Operation method of device in wireless communication system, and device using same

Abstract

Provided are an operation method of a device in a wireless communication system, and a device using the method. The method involves: receiving frequency resource allocation information indicating a set of virtual resource blocks that are consecutively allocated within a bandwidth part; and receiving a shared channel via physical resource blocks that are mapped to the virtual resource blocks, wherein the physical resource blocks are included in a downlink subband of the bandwidth part.

Description

Method of operating a device in a wireless communication system and a device using the method

[0001] The present disclosure relates to a method of operating a device in a wireless communication system and a device using the method.

[0002] As more and more communication devices demand greater communication capacity, the need for improved mobile broadband communications over existing radio access technology (RAT) is emerging. Furthermore, massive Machine Type Communications (MTC), which connects numerous devices and objects to provide diverse services anytime, anywhere, is also a key issue to be considered in next-generation communications. Furthermore, communication system design that considers reliability and latency-sensitive services / terminals is being discussed. The introduction of next-generation radio access technologies that take enhanced mobile broadband communications, massive MTC, and URLLC (Ultra-Reliable and Low Latency Communication) into account is being discussed. For convenience, these technologies are referred to herein as new RAT or NR.

[0003] Wireless communication systems, whether NR or later, can perform full duplex (FD) operation. In FD operation, a device can simultaneously perform downlink reception and uplink transmission within a specific time resource. This differs from half duplex (HD) operation, which can perform either downlink reception or uplink transmission within a specific time resource.

[0004] For FD operation, i) some frequency resources in the same time resource may be allocated as downlink subbands and other frequency resources as uplink subbands (this may be referred to as subband FD, or subband-wise full duplex (SBFD), or ii) frequency resources that can be used for both downlink reception and uplink transmission in the same time resource may be allocated (this may be referred to as spectrum shared FD, or spectrum-sharing full duplex (SSFD).

[0005] Meanwhile, among frequency resource allocation methods, there is a method of indicating the allocated frequency resources through the number of starting frequency resources and consecutive frequency resources. This is also called resource allocation type 1. When this method is used to indicate frequency resources in time resources operating as FD, especially in time resources operating as SBFD, it may be difficult to indicate that the indicated frequency resources are located only in frequency resources within the downlink subband when indicating transmission frequency resources of a shared channel, for example, a downlink shared channel.

[0006] In particular, when there are two downlink subbands and these subbands are spaced apart from each other in the frequency domain, it may be difficult to direct the frequency resources so that the transmission frequency resources of the downlink shared channel are located across the two downlink subbands using the frequency resource allocation method.

[0007] The technical problem to be solved by the present disclosure is to provide a method of operating a device in a wireless communication system and a device using the method.

[0008] A method of operating a device in a wireless communication system and a device using the method are provided. According to the method, a terminal receives frequency resource allocation information indicating a set of virtual resource blocks (VRBs) contiguously allocated within a bandwidth part (BWP), and receives a shared channel through physical resource blocks mapped to the virtual resource blocks, wherein the physical resource blocks are physical resource blocks included in a downlink subband of the bandwidth part.

[0009] In another aspect, a terminal, device, or computer-readable medium for executing the above method is provided.

[0010] In another aspect, a method of operating a base station and a base station using the method are provided. According to the method of operating the base station, the base station transmits frequency resource allocation information indicating a set of virtual resource blocks (VRBs) contiguously allocated within a bandwidth part (BWP) to a terminal, and transmits a shared channel to the terminal through physical resource blocks mapped to the virtual resource blocks, wherein the physical resource blocks are physical resource blocks included in a downlink subband of the bandwidth part.

[0011] When indicating transmission frequency resources of a downlink shared channel using resource allocation type 1, even if there are two discontinuous downlink subbands in the frequency domain in an SBFD symbol, the frequency resources can be indicated so that the downlink shared channel is located across the two downlink subbands. This allows for an increase in transmission throughput of the downlink shared channel compared to an operation in which the downlink shared channel is transmitted through only one downlink subband, and also allows for a diversity gain to be obtained.

[0012] Figure 1 illustrates a wireless communication system to which the present disclosure can be applied.

[0013] Figure 2 is a block diagram showing a radio protocol architecture for a user plane.

[0014] Figure 3 is a block diagram showing the wireless protocol structure for the control plane.

[0015] Figure 4 illustrates the system architecture of a New Generation Radio Access Network (NG-RAN) to which NR is applied.

[0016] Figure 5 illustrates the functional division between NG-RAN and 5GC.

[0017] Figure 6 illustrates the frame structure.

[0018] Figure 7 illustrates a slot structure.

[0019] Figure 8 illustrates a core set.

[0020] Figure 9 illustrates an example of a frame structure for a new wireless access technology.

[0021] Figure 10 illustrates the structure of a self-contained slot.

[0022] Figure 11 illustrates physical channels and general signal transmission.

[0023] Figure 12 is an example of PUSCH repetition type A.

[0024] Figure 13 is an example of PUSCH repetition type B.

[0025] Figure 14 shows examples of how to apply full duplex within a carrier.

[0026] Figure 15 shows examples where time resources operating in HD (half duplex) and time resources operating in FD (full duplex), such as SBFD or SSFD, coexist.

[0027] Figure 16 shows examples of a first time resource, a second time resource, a first frequency resource, and a second frequency resource.

[0028] Figure 17 illustrates another example of a first time resource, a second time resource, a first frequency resource, and a second frequency resource.

[0029] Figure 18 shows an example of non-interleaved VRB to PRB mapping.

[0030] Figure 19 is an example in which interleaved mapping is applied to mapping between a VRB bundle (VRBB) and a PRB bundle (PRBB).

[0031] Figure 20 is an example of mapping between VRBB and PRBB.

[0032] Figure 21 is another mapping example of VRBB and PRBB.

[0033] Figure 22 is another mapping example of VRBB and PRBB.

[0034] Figure 23 shows another mapping example of VRBB and PRBB.

[0035] Figure 24 illustrates a case where two DL subbands exist in an SBFD symbol when a cell performs SBFD operation.

[0036] Figure 25 shows an example of determining RBGs through which PDSCH is transmitted using the indicated RIV 1 and RIV 2 values.

[0037] Figure 26 illustrates non-interleaved VRB to PRB mapping.

[0038] Figure 27 illustrates the mapping between VRBB and PRBB.

[0039] Figure 28 illustrates an operation method of a terminal in a wireless communication system.

[0040] Figure 29 illustrates the signaling process and operation between a base station and a terminal.

[0041] Figure 30 illustrates a wireless device applicable to the present specification.

[0042] Figure 31 illustrates an example of a signal processing module structure.

[0043] Figure 32 illustrates another example of the structure of a signal processing module within a transmission device.

[0044] FIG. 33 illustrates an example of a wireless communication device according to an implementation example of the present disclosure.

[0045] Figure 34 illustrates another example of a wireless device.

[0046] Fig. 35 illustrates a communication system (1) applicable to this specification.

[0047] In this specification, “A or B” can mean “only A,” “only B,” or “both A and B.” In other words, “A or B” in this specification can be interpreted as “A and / or B.” For example, “A, B or C” in this specification can mean “only A,” “only B,” “only C,” or “any combination of A, B, and C.”

[0048] As used herein, a slash ( / ) or a comma can mean "and / or." For example, "A / B" can mean "A and / or B." Accordingly, "A / B" can mean "only A," "only B," or "both A and B." For example, "A, B, C" can mean "A, B, or C."

[0049] In this specification, “at least one of A and B” may mean “only A,” “only B,” or “both A and B.” Additionally, in this specification, the expressions “at least one of A or B” or “at least one of A and / or B” may be interpreted identically to “at least one of A and B.”

[0050] Additionally, in this specification, “at least one of A, B and C” can mean “only A,” “only B,” “only C,” or “any combination of A, B and C.” Additionally, “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.”

[0051] Additionally, parentheses used in this specification may mean “for example.” Specifically, when “control information (PDCCH)” is indicated, “PDCCH” may be suggested as an example of “control information.” In other words, “control information” in this specification is not limited to “PDCCH,” and “PDCCH” may be suggested as an example of “control information.” Furthermore, even when indicated as “control information (e.g., PDCCH),” “PDCCH” may be suggested as an example of “control information.”

[0052] Technical features individually described in a single drawing in this specification may be implemented individually or simultaneously.

[0053] The following drawings are intended to illustrate specific examples of the present specification. The names of specific devices and the names of specific signals, messages, and fields depicted in the drawings are provided for illustrative purposes only, and the technical features of this specification are not limited to the specific names used in the drawings.

[0054] Figure 1 illustrates a wireless communication system to which the present disclosure may be applied. This may also be referred to as an Evolved-UMTS Terrestrial Radio Access Network (E-UTRAN) or a Long Term Evolution (LTE) / LTE-A system.

[0055] E-UTRAN includes a base station (BS) 20 that provides a control plane and a user plane to a user equipment (UE) 10. The UE 10 may be fixed or mobile, and may be referred to by other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a wireless device, or a terminal. The base station (20) refers to a fixed station that communicates with the UE 10, and may be referred to by other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), or an access point.

[0056] Base stations (20) can be connected to each other via the X2 interface. The base station (20) is connected to an EPC (Evolved Packet Core, 30) via the S1 interface, more specifically, to an MME (Mobility Management Entity) via the S1-MME, and to an S-GW (Serving Gateway) via the S1-U.

[0057] The EPC (30) consists of an MME, an S-GW, and a P-GW (Packet Data Network-Gateway). The MME holds information about terminal access and capabilities, and this information is primarily used for terminal mobility management. The S-GW is a gateway with the E-UTRAN as its endpoint, and the P-GW is a gateway with the PDN as its endpoint.

[0058] The layers of the radio interface protocol between the terminal and the network can be divided into L1 (layer 1), L2 (layer 2), and L3 (layer 3) based on the three lower layers of the Open System Interconnection (OSI) standard model, which is widely known in communication systems. Among these, the physical layer belonging to layer 1 provides information transfer service using physical channels, and the RRC (Radio Resource Control) layer located in layer 3 controls radio resources between the terminal and the network. To this end, the RRC layer exchanges RRC messages between the terminal and the base station.

[0059] Figure 2 is a block diagram illustrating the radio protocol architecture for the user plane. Figure 3 is a block diagram illustrating the radio protocol architecture for the control plane. The user plane is a protocol stack for transmitting user data, and the control plane is a protocol stack for transmitting control signals.

[0060] Referring to Figures 2 and 3, the physical layer (PHY layer) provides information transfer services to upper layers using physical channels. The PHY layer is connected to its upper layer, the Medium Access Control (MAC) layer, through a transport channel. Data is transferred between the MAC layer and the PHY layer via the transport channel. Transport channels are classified based on how and with what characteristics data is transmitted over the wireless interface.

[0061] Data travels between different physical layers, i.e., between the physical layers of a transmitter and receiver, via a physical channel. This physical channel can be modulated using Orthogonal Frequency Division Multiplexing (OFDM) and utilizes time and frequency as radio resources.

[0062] The MAC layer's functions include mapping between logical channels and transport channels, and multiplexing / demultiplexing MAC service data units (SDUs) belonging to logical channels into transport blocks provided as physical channels on the transport channels. The MAC layer provides services to the RLC (Radio Link Control) layer through logical channels.

[0063] The functions of the RLC layer include concatenation, segmentation, and reassembly of RLC SDUs. To guarantee the various Quality of Service (QoS) required by radio bearers (RBs), the RLC layer provides three operating modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[0064] The RRC (Radio Resource Control) layer is defined only in the control plane. The RRC layer is responsible for controlling logical, transport, and physical channels, including the configuration, reconfiguration, and release of radio bearers. An RB is a logical path provided by Layer 1 (PHY layer) and Layer 2 (MAC layer, RLC layer, PDCP layer) for data transmission between a terminal and the network.

[0065] The functions of the Packet Data Convergence Protocol (PDCP) layer in the user plane include the transmission of user data, header compression, and ciphering. The functions of the Packet Data Convergence Protocol (PDCP) layer in the control plane include the transmission of control plane data and encryption / integrity protection.

[0066] Establishing an RB refers to the process of defining the characteristics of the radio protocol layer and channel to provide a specific service, and setting specific parameters and operating methods for each. RBs can be further divided into two types: signaling RBs (SRBs) and data RBs (DRBs). SRBs are used as a conduit for transmitting RRC messages in the control plane, while DRBs are used as conduits for transmitting user data in the user plane.

[0067] When an RRC connection is established between the RRC layer of the terminal and the RRC layer of the E-UTRAN, the terminal is in an RRC connected state, otherwise it is in an RRC idle state.

[0068] Downlink transmission channels that transmit data from the network to the terminal include the Broadcast Channel (BCH), which transmits system information, and the downlink Shared Channel (SCH), which transmits user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services may be transmitted through the downlink SCH or a separate downlink Multicast Channel (MCH). Meanwhile, uplink transmission channels that transmit data from the terminal to the network include the Random Access Channel (RACH), which transmits initial control messages, and the uplink Shared Channel (SCH), which transmits user traffic or control messages.

[0069] Logical channels that are located above the transport channel and are mapped to the transport channel include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), and MTCH (Multicast Traffic Channel).

[0070] A physical channel consists of multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. A single subframe consists of multiple OFDM symbols in the time domain. A resource block is a resource allocation unit and consists of multiple OFDM symbols and multiple subcarriers. Additionally, each subframe can use specific subcarriers of specific OFDM symbols (e.g., the first OFDM symbol) of the subframe for the Physical Downlink Control Channel (PDCCH), for example, the L1 / L2 control channel. A Transmission Time Interval (TTI) is a unit time for subframe transmission.

[0071] Below, we describe new radio access technology (new RAT, NR).

[0072] As more and more communication devices demand greater communication capacity, the need for improved mobile broadband communications over existing radio access technology (RAT) is emerging. Furthermore, massive Machine Type Communications (MTC), which connects numerous devices and objects to provide diverse services anytime, anywhere, is also a key issue to be considered in next-generation communications. Furthermore, communication system design that considers reliability and latency-sensitive services / terminals is being discussed. The introduction of next-generation radio access technologies that take enhanced mobile broadband communications, massive MTC, and URLLC (Ultra-Reliable and Low Latency Communication) into account is being discussed. For convenience, these technologies are referred to herein as new RAT or NR.

[0073] Figure 4 illustrates the system architecture of a New Generation Radio Access Network (NG-RAN) to which NR is applied.

[0074] Referring to FIG. 4, the NG-RAN may include gNBs and / or eNBs that provide user plane and control plane protocol termination to the UE. FIG. 4 illustrates a case where only gNBs are included. The gNBs (eNBs) are connected to each other via Xn interfaces. The gNBs and eNBs are connected to the 5th generation core network (5G Core Network: 5GC) via the NG interface. More specifically, they are connected to the access and mobility management function (AMF) via the NG-C interface, and to the user plane function (UPF) via the NG-U interface.

[0075] Figure 5 illustrates the functional division between NG-RAN and 5GC.

[0076] Referring to FIG. 5, the gNB can provide functions such as inter-cell radio resource management (Inter Cell RRM), radio bearer management (RB control), connection mobility control (Connection Mobility Control), radio admission control (Radio Admission Control), measurement configuration and provision, and dynamic resource allocation. The AMF can provide functions such as NAS security and idle state mobility processing. The UPF can provide functions such as mobility anchoring and PDU processing. The SMF (Session Management Function) can provide functions such as terminal IP address allocation and PDU session control.

[0077] Figure 6 illustrates the frame structure.

[0078] Referring to FIG. 6, a radio frame (hereinafter abbreviated as a frame) can be used for uplink and downlink transmission in NR. A frame has a length of 10 ms and can be defined as two 5 ms half-frames (Half-Frames, HF). A half-frame can be defined as five 1 ms sub-frames (Subframes, SF). A sub-frame can be divided into one or more slots, and the number of slots in a sub-frame depends on the Subcarrier Spacing (SCS). Each slot contains 12 or 14 OFDM (A) symbols depending on the CP (cyclic prefix). When a normal CP is used, each slot contains 14 symbols. When an extended CP is used, each slot contains 12 symbols. Here, the symbols can include an OFDM symbol (or a CP-OFDM symbol), an SC-FDMA symbol (or a DFT-s-OFDM symbol).

[0079] Table 1 below illustrates the subcarrier spacing configuration μ (also referred to as subcarrier spacing configuration).

[0080] [Table 1]

[0081]

[0082] Table 2 below shows the number of slots (N) in a frame according to the subcarrier spacing setting μ. frame,μ slot ), number of slots in a subframe (N subframe,μ slot ), number of symbols in the slot (N slot symb ) are examples.

[0083] [Table 2]

[0084]

[0085] In Fig. 6, examples are given for μ=0, 1, 2, and 3.

[0086] Table 2-1 below illustrates that when extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe change depending on the SCS.

[0087] [Table 2-1]

[0088]

[0089] In an NR system, OFDM(A) numerologies (e.g., SCS, CP length, etc.) may be set differently between multiple cells that are merged into a single terminal. Accordingly, the (absolute time) interval of a time resource (e.g., SF, slot, or TTI) (conveniently referred to as TU (Time Unit)) consisting of the same number of symbols may be set differently between the merged cells.

[0090] Figure 7 illustrates a slot structure.

[0091] A slot can contain multiple symbols in the time domain. For example, in the case of a normal CP, one slot can contain 14 symbols (or 7 symbols), but in the case of an extended CP, one slot can contain 12 symbols (or 6 symbols). A carrier can contain multiple subcarriers in the frequency domain. A Resource Block (RB) can be defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A Bandwidth Part (BWP) can be defined as multiple consecutive (P)RBs in the frequency domain, and can correspond to a single numerology (e.g., SCS, CP length, etc.). A carrier can contain up to N BWPs (e.g., 4 or 5). Data communication is performed through activated BWPs, and only one BWP can be activated for a single terminal. In the resource grid, each element is referred to as a Resource Element (RE), to which one complex symbol can be mapped.

[0092] A PDCCH (physical downlink control channel) may be composed of one or more CCEs (control channel elements) as shown in Table 3 below.

[0093] [Table 3]

[0094]

[0095] For example, a PDCCH can be transmitted via a resource consisting of 1, 2, 4, 8, or 16 CCEs, where a CCE is composed of 6 resource element groups (REGs), and one REG is composed of one resource block in the frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in the time domain.

[0096] Monitoring refers to decoding each PDCCH candidate according to the DCI (downlink control information) format. The terminal monitors a set of PDCCH candidates in one or more core sets (CORESETs, described below) on the active DL BWP of each activated serving cell for which PDCCH monitoring is configured, according to the corresponding search space set.

[0097] In NR, a new unit called a control resource set (CORESET) can be introduced. A terminal can receive PDCCHs in a CORESET.

[0098] Figure 8 illustrates a core set.

[0099] Referring to Figure 8, the coreset is N in the frequency domain. CORESET RB It consists of N resource blocks and is in the time domain. CORESET symb ∈ {1, 2, 3} symbols. N CORESET RB, N CORESET symb can be provided by the base station via upper layer signals. As illustrated in Fig. 8, a core set may include multiple CCEs (or REGs).

[0100] A terminal may attempt PDCCH detection in units of 1, 2, 4, 8, or 16 CCEs within a core set. One or more CCEs for which PDCCH detection can be attempted may be referred to as PDCCH candidates.

[0101] A terminal can be configured with multiple core sets.

[0102] In conventional wireless communication systems (e.g., LTE / LTE-A), the control domain spans the entire system bandwidth used by the base station. Except for some terminals that support only narrow bandwidths (e.g., eMTC / NB-IoT terminals), all terminals must be able to receive radio signals across the entire system bandwidth of the base station to properly receive / decode the control information transmitted by the base station.

[0103] In contrast, NR introduces the aforementioned core set. A core set is a radio resource for control information that a terminal must receive. It can utilize only a portion of the system bandwidth in the frequency domain, rather than the entire bandwidth. Furthermore, it can utilize only a portion of the symbols within a slot in the time domain. The base station can assign a core set to each terminal and transmit control information through the assigned core set. In NR, a terminal can receive control information from the base station without necessarily receiving the entire system bandwidth.

[0104] The core set may include a terminal-specific core set for transmitting terminal-specific control information and a common core set for transmitting control information common to all terminals.

[0105] Meanwhile, in NR, depending on the application field, high reliability may be required, and in such a situation, the target block error rate (BLER) for downlink control information (DCI) transmitted through a downlink control channel (e.g., physical downlink control channel: PDCCH) may be significantly lower than in the prior art. One example of a method for satisfying such a requirement requiring high reliability is to reduce the amount of content included in the DCI and / or increase the amount of resources used when transmitting the DCI. In this case, the resources may include at least one of time domain resources, frequency domain resources, code domain resources, and spatial domain resources.

[0106] The following technologies / features can be applied in NR:

[0107] Self-contained subframe structure

[0108] Figure 9 illustrates an example of a frame structure for a new wireless access technology.

[0109] In NR, for the purpose of minimizing latency, a structure in which a control channel and a data channel are time-division multiplexed (TDM) within one TTI, as shown in Fig. 9, can be considered as one of the frame structures.

[0110] Figure 9 shows an example in which a downlink control region is located at the front of the TTI and an uplink control region is located at the back of the TTI. The region between the downlink control region and the uplink control region can be used for downlink data (DL data) transmission or uplink data (UL data) transmission. A characteristic of this structure is that downlink (DL) reception and uplink (UL) transmission are sequentially performed within a single subframe / slot, so that DL data can be received and UL ACK / NACK (Acknowledgement / Not-acknowledgement) can be transmitted within a single subframe / slot. As a result, the time required for data retransmission when a data transmission error occurs is reduced, thereby minimizing the latency of the final data transmission.

[0111] In this way, in a data and control TDMed subframe structure, a time gap is required for the base station and terminal to transition from transmission mode to reception mode or from reception mode to transmission mode. To this end, some OFDM symbols at the point of transition from DL to UL in a self-contained subframe structure can be set as a guard period (GP).

[0112] Figure 10 illustrates the structure of a self-contained slot.

[0113] In an NR system, a single slot may contain a DL control channel, DL or UL data, and a UL control channel. For example, the first N symbols in a slot may be used to transmit a DL control channel (hereinafter, referred to as a DL control region), and the last M symbols in the slot may be used to transmit a UL control channel (hereinafter, referred to as a UL control region). N and M are each integers greater than or equal to 0. A resource region (hereinafter, referred to as a data region) between the DL control region and the UL control region may be used for DL ​​data transmission or UL data transmission. As an example, the following configuration may be considered. Each section is listed in chronological order.

[0114] 1. DL only configuration

[0115] 2. UL only configuration

[0116] 3. Mixed UL-DL configuration

[0117] - DL area + GP (Guard Period) + UL control area

[0118] - DL control area + GP + UL area

[0119] DL area: (i) DL data area, (ii) DL control area + DL data area

[0120] UL domain: (i) UL data domain, (ii) UL data domain + UL control domain

[0121] In the DL control region, a PDCCH can be transmitted, and in the DL data region, a PDSCH (physical downlink shared channel) can be transmitted. In the UL control region, a PUCCH (physical uplink control channel) can be transmitted, and in the UL data region, a PUSCH (physical uplink shared channel) can be transmitted. In the PDCCH, downlink control information (DCI), such as DL data scheduling information and UL data scheduling information, can be transmitted. In the PUCCH, uplink control information (UCI), such as ACK / NACK (Positive Acknowledgement / Negative Acknowledgement) information for DL ​​data, CSI (Channel State Information) information, and SR (Scheduling Request), can be transmitted. GP provides a time gap when a base station and a terminal switch from transmission mode to reception mode or from reception mode to transmission mode. Some symbols at the time of switching from DL to UL within a subframe can be set as GP.

[0122] Analog Beamforming #1

[0123] In millimeter wave (mmW), the wavelength is shortened, allowing for the installation of multiple antenna elements in the same area. That is, in the 30 GHz band, the wavelength is 1 cm, allowing for a total of 100 antenna elements to be installed in a two-dimensional array at 0.5 wavelength (lambda) intervals on a 5 x 5 cm panel. Therefore, in mmW, multiple antenna elements are used to increase beamforming (BF) gain, thereby increasing coverage or throughput.

[0124] In this case, if there is a transceiver unit (TXRU) that allows transmission power and phase control for each antenna element, independent beamforming is possible for each frequency resource. However, it is not practical in terms of cost to install a TXRU for all 100 or so antenna elements. Therefore, a method of mapping multiple antenna elements to a single TXRU and controlling the direction of the beam with an analog phase shifter is being considered. This analog beamforming method has the disadvantage of being unable to perform frequency-selective beamforming because it can only create one beam direction for the entire band.

[0125] Hybrid beamforming (hybrid BF), which has B TXRUs, which is less than Q antenna elements, can be considered as an intermediate form between digital beamforming (Digital BF) and analog beamforming (Analog BF). In this case, depending on the connection method of the B TXRUs and Q antenna elements, the number of beam directions that can be transmitted simultaneously is limited to B or fewer.

[0126] Analog Beamforming #2

[0127] In NR systems, when multiple antennas are used, a hybrid beamforming technique that combines digital beamforming and analog beamforming is emerging. In this case, analog beamforming (or RF beamforming) performs precoding (or combining) at the RF end, which has the advantage of achieving performance close to digital beamforming while reducing the number of RF chains and D / A (or A / D) converters. For convenience, the hybrid beamforming structure can be expressed as N TXRUs and M physical antennas. Then, the digital beamforming for L data layers to be transmitted from the transmitter can be expressed as an N by L matrix, and the N converted digital signals are converted into analog signals through the TXRU, and then analog beamforming expressed as an M by N matrix is ​​applied.

[0128] System information of an NR system can be transmitted in a broadcasting manner. At this time, analog beams belonging to different antenna panels within one symbol can be transmitted simultaneously, and a method of introducing a beam reference signal (BRS), which is a reference signal (RS) transmitted by applying a single analog beam (corresponding to a specific antenna panel) to measure a channel for each analog beam, is being discussed. The BRS can be defined for multiple antenna ports, and each antenna port of the BRS can correspond to a single analog beam. At this time, unlike the BRS, a synchronization signal or xPBCH can be transmitted by applying all analog beams within an analog beam group so that any terminal can receive it well.

[0129] In NR, a synchronization signal block (SSB, or may be referred to as a synchronization signal and physical broadcast channel (SS / PBCH) in the time domain) may be composed of four OFDM symbols numbered in ascending order from 0 to 3 within the synchronization signal block, and a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a PBCH associated with a demodulation reference signal (DMRS) may be mapped to the symbols. As described above, the synchronization signal block may also be referred to as an SS / PBCH block.

[0130] In NR, multiple synchronization signal blocks can be transmitted at different times, and SSB can be used to perform initial access (IA), serving cell measurement, etc. Therefore, when the transmission timing and resources overlap with other signals, it is desirable to transmit SSB preferentially. To achieve this, the network can broadcast SSB transmission timing and resource information or indicate it through UE-specific RRC signaling.

[0131] NR can perform beam-based transmission and reception operations. If the reception performance of the current serving beam degrades, a process called beam failure recovery (BFR) can be used to find a new beam.

[0132] Since BFR is not a process for declaring an error / failure in the link between the network and the terminal, it can be assumed that the connection with the current serving cell is maintained even when the BFR process is performed. During the BFR process, measurements are performed on different beams set by the network (a beam can be expressed as a CSI-RS port or an SSB (synchronization signal block) index, etc.) and the best beam for the terminal is selected. The terminal can proceed with the BFR process by performing the RACH process associated with the beam with the best measurement result.

[0133] Now, we will describe the Transmission Configuration Indicator (TCI) state. The TCI state can be set for each core set of the control channel, and parameters for determining the terminal's receive (Rx) beam can be determined based on the TCI state.

[0134] For each downlink bandwidth portion (DL BWP) of a serving cell, a terminal may be configured with up to three core sets. Additionally, for each core set, the terminal may be provided with the following information:

[0135] 1) Coreset index p (e.g., one from 0 to 11, where the index of each coreset can be uniquely determined among the BWPs of a serving cell),

[0136] 2) PDCCH DM-RS scrambling sequence initialization value,

[0137] 3) Interval in the time domain of the core set (can be given in symbol units),

[0138] 4) A set of resource blocks,

[0139] 5) CCE-to-REG mapping parameters,

[0140] 6) Antenna port quasi co-location (QCL) information indicating quasi co-location (QCL) information of DM-RS antenna ports for PDCCH reception in each core set (from a set of antenna port quasi co-locations provided by a higher layer parameter called 'TCI-State');

[0141] 7) Indicating the presence or absence of a transmission configuration indication (TCI) field for a specific DCI format transmitted by PDCCH in the core set, etc.

[0142] Let's explain QCL. If the characteristics of the channel through which a symbol on one antenna port is transmitted can be inferred from the characteristics of the channel through which a symbol on another antenna port is transmitted, then the two antenna ports are said to be in quasi-co-location (QCL). For example, if two signals (A and B) are transmitted from the same transmit antenna array with identical / similar spatial filters applied, the two signals may experience identical / similar channel conditions. From the receiver's perspective, if one of the two signals is received, the channel characteristics of the received signal can be used to detect the other signal.

[0143] In this sense, the fact that A and B are QCL may mean that A and B experienced similar channel conditions, and thus, the channel information estimated to detect A is also useful for detecting B. Here, the channel conditions may be defined by, for example, Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameters, etc.

[0144] The 'TCI-State' parameter associates one or two downlink reference signals with a corresponding QCL type (there are QCL types A, B, C, and D, see Table 4).

[0145] [Table 4]

[0146]

[0147] Each 'TCI-State' may include parameters for establishing a quasi-colocation (QCL) relationship between one or two downlink reference signals and a DM-RS port of a PDSCH (or PDCCH), or a CSI-RS port of a CSI-RS resource.

[0148] Meanwhile, in each DL BWP configured for a terminal in a serving cell, the terminal may be provided with up to 10 search space sets. For each search space set, the terminal may be provided with at least one of the following pieces of information.

[0149] 1) Search space set index s (0≤s<40), 2) Association between core set P and search space set s, 3) PDCCH monitoring period and PDCCH monitoring offset (slot unit), 4) PDCCH monitoring pattern within a slot (e.g., indicating the first symbol of the core set within a slot for PDCCH monitoring), 5) Number of slots in which search space set s exists, 6) Number of PDCCH candidates per CCE aggregation level, 7) Information indicating whether search space set s is CSS (common search space) or USS (UE-specific search space), etc.

[0150] In NR, core set #0 can be configured by PBCH (or terminal-specific signaling for handover, PSCell configuration, or BWP configuration). The search space (SS) set #0 configured by PBCH can have different monitoring offsets (e.g., slot offset, symbol offset) for each associated SSB. This may be necessary to minimize the search space occasions that the terminal must monitor. Alternatively, it may also be necessary to provide a beam sweeping control / data area that can transmit control / data for each beam so that communication with the terminal can be continuously performed in a situation where the best beam of the terminal dynamically changes.

[0151] Figure 11 illustrates physical channels and general signal transmission.

[0152] Referring to Figure 11, in a wireless communication system, a terminal receives information from a base station via the downlink (DL), and the terminal transmits information to the base station via the uplink (UL). The information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist depending on the type and purpose of the information they transmit and receive.

[0153] When a terminal is powered on again from a powered-off state or newly enters a cell, it performs an initial cell search operation, such as synchronizing with the base station (S11). To this end, the terminal receives the PSCH (Primary Synchronization Channel) and SSCH (Secondary Synchronization Channel) from the base station to synchronize with the base station and obtain information such as the cell ID (cell identity). In addition, the terminal can obtain broadcast information within the cell by receiving the PBCH (Physical Broadcast Channel) from the base station. In addition, the terminal can receive the DL RS (Downlink Reference Signal) during the initial cell search phase to check the downlink channel status.

[0154] (Initial) cell search can be defined as a procedure in which a terminal acquires time and frequency synchronization with a cell and detects the cell ID of the cell. Cell search can be based on the primary synchronization signal and secondary synchronization signal of the cell, and the PBCH DMRS.

[0155] A terminal that has completed initial cell search can obtain more specific system information by receiving a PDCCH (Physical Downlink Control Channel) and a corresponding PDSCH (Physical Downlink Control Channel) (S12).

[0156] Thereafter, the terminal may perform a random access procedure (Random Access Procedure) to complete connection to the base station (S13-S16). Specifically, the terminal may transmit a preamble through a Physical Random Access Channel (PRACH) (S13) and receive a Random Access Response (RAR) for the preamble through a PDCCH and a 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 (Contention Resolution Procedure) such as a PDCCH and a corresponding PDSCH (which may be considered a process of receiving a contention resolution message) (S16).

[0157] A terminal that has performed the above-described procedure can then perform PDCCH / PDSCH reception (S17) and PUSCH / PUCCH (Physical Uplink Control Channel) transmission (S18) as general uplink / downlink signal transmission procedures. Control information that the terminal transmits 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 generally transmitted through PUCCH, but can be transmitted through PUSCH when control information and data must be transmitted simultaneously. In addition, the terminal can aperiodically transmit UCI through PUSCH according to a request / instruction of the network.

[0158] To enable reasonable battery consumption when BA (bandwidth adaptation) is configured, only one uplink BWP and one downlink BWP, or only one downlink / uplink BWP pair, for each uplink carrier can be activated at a time within an active serving cell, while all other BWPs configured in the UE are deactivated. In deactivated BWPs, the UE does not monitor the PDCCH and does not transmit on the PUCCH, PRACH, and UL-SCH.

[0159] For BA, the receive and transmit bandwidth of the terminal need not be as wide as the cell bandwidth and can be adjusted: the width can be commanded to change (e.g., shrinking during periods of low activity to save power), the location in the frequency domain can be moved (e.g., to increase scheduling flexibility), and the subcarrier spacing can be commanded to change (e.g., to allow different services). A subset of the total cell bandwidth of a cell is referred to as a bandwidth part (BWP), and a BA is obtained by setting BWP(s) to the terminal and notifying the terminal which of the set BWPs is currently active. Once a BA is set, the terminal only needs to monitor the PDCCH on one active BWP. For example, there is no need to monitor the PDCCH on the entire downlink frequency of the cell. A BWP inactive timer (independent of the DRX inactive timer described above) is used to switch an active BWP to a default BWP: the timer is restarted upon successful PDCCH decoding, and a switch to the default BWP occurs when the timer expires.

[0160] Below, we describe the integrated access and backhaul link (IAB). For convenience, the proposed approach is based on the new RAT (NR) system. However, the scope of the proposed approach can be expanded to include other systems, such as 3GPP LTE / LTE-A systems, in addition to NR systems.

[0161] One potential technology that aims to enable future cellular network deployment scenarios and applications is support for wireless backhaul and relay links, enabling flexible and very dense deployment of NR cells without the need to proportionally densify the transport network.

[0162] The expected availability of greater bandwidth in NR compared to LTE (e.g., in the mmWave spectrum), along with the native deployment of massive MIMO or multi-beam systems, creates opportunities for the development and deployment of integrated access and backhaul links. This allows for easier deployment of dense networks of self-backhauled NR cells in a more integrated manner by establishing multiple control and data channels / procedures defined to provide connectivity or access to terminals. Such systems are referred to as integrated access and backhaul links (IAB).

[0163] In this disclosure, the following are defined:

[0164] - AC(x): Access link between node(x) and terminal(s).

[0165] - BH(xy): Backhaul link between node(x) and node(y).

[0166] At this time, the node may refer to a DgNB (donor gNB) or a relay node (RN). Here, the DgNB or donor node may be a gNB that provides a function to support backhaul for IAB nodes.

[0167] When relay node 1 and relay node 2 exist, and relay node 1 is connected to relay node 2 via a backhaul link and relays data transmitted and received to relay node 2, relay node 1 is called the parent node of relay node 2, and relay node 2 is called the child node of relay node 1.

[0168] <PUSCH 반복(repetitions)>

[0169] PUSCH repetition types A and B were introduced in the standard specifications (e.g., NR Rel-15 / 16). Transmission is performed as follows depending on the PUSCH repetition type.

[0170] 1) PUSCH repetition type A

[0171] Figure 12 is an example of PUSCH repetition type A.

[0172] Referring to FIG. 12, PUSCH repetition type A is a slot-based PUSCH repetition transmission, and repetition is performed with the same PUSCH transmission start symbol position and PUSCH transmission symbol length for each slot, as illustrated in FIG. 12. At this time, if an invalid symbol that cannot be used for PUSCH transmission exists among the symbol resources constituting a specific PUSCH repetition, the transmission of the corresponding PUSCH repetition is dropped and not performed. For example, when a total of four PUSCH repetition transmissions of Rep0, Rep1, Rep2, and Rep3 are performed in slots N, N+1, N+2, and N+3 (one PUSCH repetition is transmitted in each slot), if an invalid symbol is included in the symbol resources constituting Rep1, the transmission of Rep1 is dropped, and only the transmissions of Rep0, Rep2, and Rep3 are performed. Therefore, the actual number of repetitions performed may be less than the set number of repetitions.

[0173] For PUSCH repetition type A, frequency hopping can be configured for the UE by upper layer parameters. One of two frequency hopping modes can be configured.

[0174] i) Frequency hopping within a slot is applicable to single slot and multi-slot PUSCH transmission.

[0175] ii) Inter-slot frequency hopping is applicable to multi-slot PUSCH transmission.

[0176] 2) PUSCH repetition type B

[0177] Figure 13 is an example of PUSCH repetition type B.

[0178] Referring to Fig. 13, PUSCH repetition type B is repeated in units of the symbol length in which the actual PUSCH is transmitted. For example, as in (a) of Fig. 13, when the PUSCH is transmitted through 10 symbols, PUSCH repetition is performed in units of 10 consecutive symbols. At this time, the repetition that determines the PUSCH repetition transmission time resource without considering slot boundaries, invalid symbols, etc. is called nominal repetition. In Fig. 13 (a), three nominal repetitions (N0, N 1, An example is shown where N2 is set.

[0179] However, in the case of actual PUSCH repetition, a single PUSCH cannot be transmitted while including a slot boundary. For example, if a nominal PUSCH transmission includes a slot boundary (e.g., N0, N2 in (a) of FIG. 13), two actual repetitions are performed with the slot boundary as the boundary, as in (b) of FIG. 13. For example, nominal repetition N0 is performed with two actual repetitions, such as A0, A1, with the slot boundary as the boundary.

[0180] Additionally, a single PUSCH transmission can only be performed using consecutive symbols. If an invalid symbol exists in the time resource where a PUSCH repetition should be transmitted, the actual repetition is formed using consecutive symbols with the invalid symbol as the boundary. For example, if symbols #0 to #9 constitute a nominal repetition and symbols #3 to #5 are invalid symbols, symbols #0 to #2 and symbols #6 to #9, excluding the invalid symbol, each constitute an actual repetition.

[0181] Invalid symbols may include the following:

[0182] i) Downlink symbol set by semi-static TDD UL-DL setting,

[0183] ii) an invalid symbol pattern set by RRC (which may be set by the invalid symbol pattern indicator);

[0184] iii) SSB symbol set by SIB1, SSB symbol set by 'ServngCellConfigCommon',

[0185] iv) Symbol for PDCCH for SIB1,

[0186] v) Invalid symbol for DL-UL switching set by RRC.

[0187] If a symbol that cannot be used for PUSCH transmission (e.g., a DL symbol indicated by DCI format 2_0) is included within one actual repetition resource, the corresponding actual repetition transmission is dropped and not performed.

[0188] Now, we describe full duplex operation.

[0189] 5G is giving rise to new service types, such as extended reality (XR), AI-based services, and self-driving cars. These services feature dynamic traffic in both downlink (DL) and uplink (UL) directions, and require low latency for traffic transmission (e.g., packets). 5G services will experience explosive growth in traffic to support these diverse new use cases.

[0190] Existing semi-static or dynamic TDD UL / DL configurations suffer from transmission delays and interference between operators. Existing FDD schemes also face limitations in efficient frequency resource utilization in the DL / UL directions. Therefore, the introduction of full-duplex operation within a single carrier is being discussed to achieve low latency and efficient resource utilization in NR.

[0191] Figure 14 shows examples of how to apply full duplex within a carrier.

[0192] Referring to FIG. 14, in the full duplex method, subband-wise full duplex (hereinafter, referred to as subband full duplex or SBFD) as in (a) of FIG. 14 and spectrum-sharing full duplex (hereinafter, referred to as SSFD) as in (b) of FIG. 14 can be considered.

[0193] In SBFD, DL and UL transmission and reception are performed via different frequency resources within the same carrier (e.g., carrier #0). For example, DL and UL use different frequency resources for the same time resource.

[0194] In SSFD, DL and UL transmission and reception are performed using the same or overlapping frequency resources within the same carrier (e.g., carrier #0). For example, DL and UL can use the same or overlapping frequency resources for the same time resource.

[0195] This full-duplex (FD) operation can also be combined with existing half-duplex (HD) operation. For example, among the time resources used for existing half-duplex-based TDD operation, some of the time resources can be used for full-duplex operation. For example, SBFD or SSFD operation can be performed on the time resources performing full-duplex operation.

[0196] Figure 15 shows examples where time resources operating in HD (half duplex) and time resources operating in FD (full duplex), such as SBFD or SSFD, coexist.

[0197] In (a) of Fig. 15, some time resources operating in SBFD are indicated as SBFD, and time resources operating in half-duplex are indicated as HD. In (b) of Fig. 15, some time resources operating in SSFD are indicated as SSFD, and time resources operating in half-duplex are indicated as HD. The unit of the time resource may be, for example, a slot or a symbol.

[0198] In a time resource operating under SBFD, some frequency resources are used as DL resources, while others are used as UL resources. Between the DL and UL frequency resources, there may be a guard subband that is unused for both DL and UL and remains empty. The guard subband may also be referred to by other terms, such as guard frequency resources or guard subcarrier(s).

[0199] In a time resource operating in SSFD, the entire frequency resource can be used for both DL and UL. Alternatively, to reduce the impact of interference from other adjacent carriers (which may be referred to as adjacent carrier interference (ACI)), some frequency resources at one or both ends of the carrier can be left unused for DL ​​and / or UL. For example, one or both ends of the carrier can be used as guard bands (guard subbands) that are not used for both DL and UL. Alternatively, to reduce the impact of ACI on UL reception, one or both ends of the carrier can be used exclusively for DL ​​transmission.

[0200] In this disclosure, a slot resource operating in half-duplex is referred to as an HD slot, and a slot resource operating in SBFD and a slot resource operating in SSFD are referred to as an SBFD slot (SBFD slot) and an SSFD slot (SSFD slot), respectively. In addition, an SSFD slot and an SSFD slot are collectively referred to as an FD slot.

[0201] In the present disclosure, in a time resource operating as FD, a frequency resource operating as DL among the entire frequency resources is conveniently called a DL subband, and a frequency resource operating as UL may also be called a UL subband.

[0202] In full-duplex operation, both the base station and the terminal can perform full-duplex operation. For example, both the base station and the terminal can simultaneously transmit and receive DL and UL signals using the same or different frequency resources within the same time resource.

[0203] Alternatively, only the base station can perform full-duplex operation, while the terminals can perform half-duplex operation. The base station can simultaneously transmit and receive DL and UL signals using the same or different frequency resources in the same time resource, but the terminals perform only DL reception or UL transmission in specific time resources. In this case, the base station performs full-duplex operation by performing DL transmission and UL reception with different terminals at the same time.

[0204] In the present disclosure, the base station may perform / support full duplex operation, while the terminal may perform / support half duplex operation. Alternatively, in the present disclosure, both the base station and the terminal may perform / support full duplex operation.

[0205] <SBFD 및 SSFD 동작을 위한 DL / UL 시간 / 주파수 자원의 특성>

[0206] A cell (base station) can perform both DL transmission and UL reception in the same time resource in a FD manner, such as SBFD or SSFD. For example, the base station can perform HD operation in the first time resource and FD operation in the second time resource (which may be any time resource other than the first time resource).

[0207] Through this operation, the network can change the time resource for performing transmission and reception between the first time resource and the second time resource depending on the type of signal / channel being transmitted and received or the terminal performing the transmission and reception. For example, in the case of important signals / channels (e.g., SSB, PRACH) that require high transmission and reception performance with less influence from interference, the resources can be set to transmit and receive only on the first time resource that operates only in half duplex. This allows the transmission and reception performance of the corresponding signals / channels to be maintained while applying full duplex to the cell. Alternatively, in the case of a terminal that cannot properly transmit and receive due to the significant influence of cross link interference (CLI) when operating in full duplex on the second time resource, the transmission and reception performance for the terminal can be guaranteed by setting the resources to perform transmission and reception on the first time resource.

[0208] The terminal / base station performs DL or UL operations across the entire frequency resources that constitute the entire system bandwidth in the first time resource where the HD operation is performed. Within the first time resource where the HD operation is performed, the network performs DL operations through the 1-1 time resource and UL operations through the 1-2 time resource. At this time, the 1-1 time resource and the 1-2 time resource do not overlap with each other.

[0209] The terminal / base station performs FD operation in the second time resource, and the network performs DL operation through all or part of the frequency resources (first frequency resources) among the frequency resources constituting the system band of the cell, and performs UL operation through all or part of the frequency resources (second frequency resources).

[0210] Figure 16 shows examples of a first time resource, a second time resource, a first frequency resource, and a second frequency resource.

[0211] Referring to (a) of FIG. 16, in the first time resource (indicated by A), the device operates in half-duplex. In the second time resource (indicated by B), the device may operate in, for example, SBFD. The resource indicated by DL in the first time resource corresponds to the aforementioned 1-1 time resource, and the resource indicated by UL corresponds to the aforementioned 1-2 time resource.

[0212] Referring to (b) of Fig. 16, the frequency resource operating as DL in the second time resource corresponds to the first frequency resource described above, and the frequency resource operating as UL corresponds to the second frequency resource described above.

[0213] Figure 17 illustrates another example of a first time resource, a second time resource, a first frequency resource, and a second frequency resource.

[0214] Referring to (a) of FIG. 17, in the first time resource (indicated by A), the device operates in half-duplex. In the second time resource (indicated by B), for example, it may operate in SSFD. The resource indicated by DL in the first time resource corresponds to the aforementioned 1-1 time resource, and the resource indicated by UL corresponds to the aforementioned 1-2 time resource.

[0215] Referring to (b) of Fig. 17, the frequency resources operating as DL and DL+UL in the second time resource correspond to the first frequency resource described above, and the frequency resources operating as DL+UL correspond to the second frequency resource described above.

[0216] The first frequency resource and / or the second frequency resource may have all or some of the following characteristics:

[0217] 1) When performing SBFD operation, the first frequency resource and the second frequency resource do not overlap with each other. This is to ensure that DL and UL operations are performed through different frequency resources. At this time, there may be frequency resources that do not correspond to either the first or second frequency resources, and such frequency resources are called guard subbands or guard frequency resources. Such guard frequency resources may be necessary to reduce interference between DL transmission and UL reception. The guard frequency resource may be located between the first and second frequency resources.

[0218] 2) When performing SSFD operation, the first frequency resource and the second frequency resource may overlap. In this case, there may be frequency resources that do not correspond to either the first frequency resource or the second frequency resource, and such frequency resources are called guard subbands or guard frequency resources. Such guard frequency resources may be necessary to reduce interference between DL transmissions on adjacent carriers and / or between DL transmissions and UL reception on adjacent carriers.

[0219] 3) When performing the SBFD operation, the second frequency resource may be configured with continuous frequency resources, and the first frequency resource may be configured with non-contiguous frequency resources. In this case, the first frequency resource may be configured with multiple (for example, two) non-contiguous sets, and each set may be configured with continuous frequency resources. This is to reduce interference of DL transmission on adjacent carriers to UL resources by positioning the second frequency resource used for UL at the center of the frequency resources constituting the cell. Conversely, the first frequency resource may be configured with continuous frequency resources, and the second frequency resource may be configured with non-contiguous frequency resources. In this case, the second frequency resource may be configured with multiple (for example, two) non-contiguous sets, and each set may be configured with continuous frequency resources. This is to reduce interference of DL transmission on UL resources on adjacent carriers by positioning the second frequency resource used for DL ​​at the center of the frequency resources constituting the cell.

[0220] 4) When performing SSFD operation, the second frequency resource may be configured with a portion of the frequency resources of the first frequency resource. In this case, the second frequency resource may be configured with X PRBs (physical resource blocks) less than the first frequency resource for one or both edge portions of the carrier. This is to reduce interference between DL transmission on adjacent carriers and UL reception.

[0221] Through the above operation, the base station can perform a half-duplex operation in which only one of DL transmission or UL reception is performed in the entire frequency resources constituting the cell in the first time resource, and a full-duplex operation in which DL transmission is performed through the first frequency resource within the frequency resources constituting the cell and UL reception is simultaneously performed through the second frequency resource within the frequency resources constituting the cell in the second time resource.

[0222] The network can determine / judge the 'first time resource' and the 'second time resource', and the 'first frequency resource' and the 'second frequency resource' as described above, and provide all or part of the corresponding information to the terminal. The network can perform DL transmission to the terminal in the '1-1 time resource within the first time' and the '1 frequency resource within the second time resource', and perform UL reception from the terminal in the '1-2 time resource within the first time resource' and the '2 frequency resource within the second time resource'.

[0223] The terminal can receive all or part of the information about the 'first time resource' and the 'second time resource' and the 'first frequency resource' and the 'second frequency resource' from the network, and determine the location of the resources. The terminal can perform DL reception from the network through all or part of the '1-1 time resource within the first time' and the '1 frequency resource within the second time resource', and perform UL transmission to the network through the '1-2 time resource within the first time resource' and the '2 frequency resource within the second time resource'.

[0224] Hereinafter, at least one of the following resources may mean a first time resource: 1) a time resource operating in TDD, 2) a time resource operating in HD, 3) a time resource operating in Non-SBFD, 4) a TDD symbol, 5) an HD symbol, 6) a Non-SBFD symbol.

[0225] Hereinafter, at least one of the following resources may mean a second time resource: 1) a time resource operating as SBFD and / or SSFD, 2) an SBFD symbol and / or an SSFD symbol.

[0226] Meanwhile, in the existing NR TDD carrier, the base station performs only one operation, either downlink or uplink, in a specific time resource. In this case, the base station always operates in the downlink in the time resource where SSB is transmitted.

[0227] For terminals operating in existing TDD, the following is assumed for symbols in which SSB (SS / PBCH) is transmitted.

[0228] 1) SS / PBCH transmission symbols cannot be configured for uplink by TDD configuration (e.g., 'TDD-UL-DL-ConfigCommon' and / or 'TDD-UL-DL-ConfigDedicated').

[0229] 2) SS / PBCH transmission symbols cannot be set to uplink in SFI (slot format indication) by DCI format 2_0.

[0230] 3) When SS / PBCH is transmitted in a symbol set to flexible by TDD configuration (e.g., 'TDD-UL-DL-ConfigCommon' and / or 'TDD-UL-DL-ConfigDedicated'), if the uplink transmission of the terminal overlaps with the SS / PBCH symbol, the uplink transmission is not performed. In case of SRS, if it overlaps with the SS / PBCH symbol in the flexible symbol, SRS transmission is not performed in the overlapped symbol(s).

[0231] Meanwhile, in FDs such as SBFD and SSFD, both DL and UL resources can exist in the same time resource from the cell's perspective. Therefore, the base station can simultaneously perform downlink transmission and uplink reception. Therefore, even if SS / PBCH are transmitted in the time resource where the cell is performing FD operation, the base station can perform uplink reception while transmitting SS / PBCH.

[0232] Meanwhile, under the current standard, terminals cannot perform uplink transmission on symbol resources where SS / PBCH transmission occurs. For example, terminals cannot perform FD operations on SS / PBCH transmission time resources of a base station.

[0233] When a specific time resource is configured as a time resource operating in SBFD (SBFD symbol), both DL and UL resources can exist in that time resource. In this case, if there is no UL signal to be received by the base station in that time resource, the base station can only perform DL transmission. In SBFD resources, DL transmission occurs only within the DL subband. Therefore, even if there is no UL signal transmitted in the UL subband, DL transmission can only be performed within the DL subband.

[0234] In this case, even if a specific time resource is determined to be an SBFD symbol, if there is no UL transmission to be received by the base station, performing DL transmission not only within the DL subband but also outside the DL subband may be considered to improve DL throughput. For example, performing DL transmission across the entire bandwidth may be considered.

[0235] For example, a fallback to TDD operation that performs DL or UL operation over the entire band, rather than SBFD operation over the DL / UL subband, can be considered for resources judged as SBFD symbols.

[0236] In this disclosure, we assume and describe SBFD operation, in which a cell performs DL and UL simultaneously using different frequency resources (e.g., subbands) within the same time resource. However, the contents of this disclosure can also be applied to a cell performing SSFD operation.

[0237] In a wireless communication system, i) the base station may perform full duplex operation and the terminal may perform half duplex operation, ii) the base station may perform half duplex operation and the terminal may perform full duplex operation, or iii) both the base station and the terminal may support full duplex operation.

[0238] A terminal that knows that the base station can perform full duplex operation may be referred to as an FD-aware terminal hereinafter. A terminal that knows that the base station can perform SBFD operation may be referred to as an SBFD-aware terminal hereinafter. A terminal that knows that the base station can perform SSFD operation may be referred to as an SSFD-aware terminal hereinafter.

[0239] If a base station supports both half-duplex and full-duplex operation, it can inform the terminal of the resources (time or frequency, or both) on which it can (or expects to) perform half-duplex and full-duplex.

[0240] If the base station is a full-duplex base station capable of SSFD operation, UL reception may be possible simultaneously on some or all of the frequency resources available for DL ​​transmission at the base station. For example, some frequency resources may support both DL transmission / reception and UL reception / transmission. In this case, information about frequency resources that support SSFD may be communicated to the terminal. Furthermore, information about time resources that support SSFD may be communicated to the terminal.

[0241] In the case of a full-duplex terminal, UL transmission may be possible simultaneously on some or all of the frequency resources available for DL ​​reception of the terminal. In the present disclosure, a terminal that performs half-duplex operation may be referred to as an HD terminal, and a terminal that can (or does) perform full-duplex operation may be referred to as an FD terminal.

[0242] When a base station performs full duplex operation such as SBFD or SSFD, it may perform SSFD and / or SBFD operation only for some time / frequency resources. When an SBFD-aware terminal and / or an SSFD-aware terminal knows the time / frequency resources on which a cell performs SSFD and / or SBFD operation, the terminal may perform the operation differently depending on whether the cell operates in half duplex (HD) or SBFD or SSFD. For example, the terminal may perform transmission and reception by differently determining the time / frequency resources on which it performs reception of a DL signal / channel and / or transmission of a UL signal / channel as HD resources, SBFD resources, or SSFD resources.

[0243] In the time resources operating in HD, the base station may perform a half-duplex operation in which only one of DL transmission or UL reception is performed across the frequency resources constituting the cell, and in the time resources operating in SBFD and SSFD, the base station may perform a full-duplex operation in which DL transmission is performed through a first frequency resource (e.g., a DL subband resource) within the frequency resources constituting the cell and UL reception is simultaneously performed through a second frequency resource (e.g., a UL subband resource) within the frequency resources constituting the cell.

[0244] To this end, the base station determines / determines time resources corresponding to the first time resource (e.g., HD symbol) and the second time resource (e.g., FD symbol) and transmits configuration information regarding the first time resource (e.g., HD symbol) and / or the second time resource (e.g., FD symbol) to the terminal. The FD symbol may include both the SBFD symbol and the SSFD symbol. More specifically, the base station may determine / determine time resources corresponding to the HD symbol, the SBFD symbol, and / or the SSFD symbol, and transmit configuration information regarding the HD symbol, the SBFD symbol, and / or the SSFD symbol to the terminal.

[0245] At this time, the DL subband resources and / or UL subband resources may be configured differently in the time resources operating in SBFD and in the time resources operating in SSFD. In the time resources operating in SBFD, the DL subband resources and UL subband resources are configured so as not to overlap each other. On the other hand, in the time resources operating in SSFD, the DL subband resources and UL subband resources may be configured so as to overlap each other. The DL subband / UL subband resources may be configured with a portion of the frequency resources of the system bandwidth or with the entire frequency resources.

[0246] The terminal receives configuration information about an HD symbol, an SBFD symbol, and / or an SSFD symbol from the network, and determines the positions of the HD symbol, the SBFD symbol, and / or the SSFD symbol. At this time, the terminal performs DL reception (UL transmission) through the entire frequency resources for which the terminal is configured to operate DL reception (UL transmission) in the HD symbol. And, in the SBFD symbol and / or the SSFD symbol, the terminal performs DL reception (UL transmission) through DL subband (UL subband) resources that are the same as or limited (smaller) to the frequency resources for which the terminal performs DL reception (UL transmission) in the HD symbol. In this case, even if the terminal configures frequency resources that do not correspond to DL subband resources (UL subband resources) in the SBFD symbol and / or SSFD symbol resources for DL ​​reception (UL transmission), the terminal does not perform DL reception (UL transmission) in the frequency resources that do not correspond to DL subband resources (UL subband resources).

[0247] In the following, the term "network" may be interpreted as a base station, gNB, or CU / DU. Furthermore, the term "terminal (UE)" may be interpreted as a mobile terminal (MT) of an IAB node.

[0248] Below we describe the SBFD operations that can be applied.

[0249] In time division duplex (TDD), time-domain resources are divided into downlink and uplink. Allocating a limited time slot to the uplink in TDD reduces coverage, increases latency, and reduces capacity. To address these limitations of existing TDD operations, allowing simultaneous downlink and uplink operations within the existing TDD band—i.e., full duplex, or more specifically, subband full duplex—has been considered. The TDD standard allows for dynamic and flexible time allocation for downlink and uplink, and introduces cross-link interference (CLI) handling and remote interference management (RIM).

[0250] For SBFD operation within a TDD carrier, the base station can semi-statically indicate the time position of the SBFD subband to a UE in RRC_CONNECTED mode. For example, the base station can inform the UE of the time position of the SBFD subband in the system information block (SIB).

[0251] In RRC_CONNECTED mode, the base station can semi-statically inform the UE of the frequency domain location of the SBFD subband. For example, the base station can inform the UE of the frequency location of the SBFD subband in the system information block (SIB).

[0252] A base station can specify SBFD operation to support random access of SBFD symbols by a terminal in RRC CONNECTED mode.

[0253] The base station may review the SBFD behavior for the terminal for random access in RRC_IDLE / INACTIVE mode and, if justified, specify such behavior.

[0254] For SBFD-aware terminals, a base station can specify terminal transmission, reception, and measurement operations and procedures in SBFD symbols and / or non-SBFD symbols.

[0255] For example, transmission and reception operations in SBFD subbands composed of downlink symbols and / or flexible symbols can be indicated by 'TDD-UL-DL-ConfigCommon'. In this case, UL transmission can be performed only within the UL subband, and DL reception can be performed only within the DL subband. When flexible symbols are used, legacy uplink symbols are not (or are expected not to be) converted into downlink / SBFD symbols.

[0256] In frequency-domain resource allocation of the SBFD symbol, frequency-domain resources for PDSCH / CSI-RS may be allocated across two DL subbands in the SBFD symbol. Additionally, the base station may provide additional instructions for handling unaligned boundaries between the SBFD subband and the RBG, CSI reporting subband, CSI-RS resources, and PRG.

[0257] Within a single slot, transmission and reception may be performed using either all SBFD symbols or all non-SBFD symbols, but transmission and reception of physical signals / channels may be performed through slots that include different types of symbols. For example, an operation may be directed / performed in which transmission and reception is performed using only SBFD symbols in a first slot, and transmission and reception is performed using only non-SBFD symbols in a second slot, but signal / channel transmission and reception is performed across the first and second slots.

[0258] Frequency-domain resource allocation for transmission or reception of SBFD and non-SBFD symbols with different available frequency resources in different slots may be supported. CSI reporting in which related CSI-RS instances occur in both SBFD and non-SBFD symbols in different slots may also be supported.

[0259] Settings for SRS, PUCCH and PUSCH of SBFD symbols and non-SBFD symbols, such as resources, frequency hopping parameters, UL power control parameters and / or beam / space relationships, may be provided to the terminal by the base station.

[0260] Additionally, collision handling between DL reception in the DL subband and UL transmission in the UL subband in the SBFD symbol can also be instructed to the terminal by the base station.

[0261] In the following, it is assumed that the time and frequency locations of subbands for SBFD operation are known to SBFD-aware terminals. In a cell operating in SBFD, non-SBFD-aware terminals (e.g., legacy terminals) and SBFD-aware terminals can coexist.

[0262] For convenience, it may be assumed that there is one UL subband for SBFD operation in an SBFD symbol within a TDD carrier, but this is not a limitation.

[0263] Based on this discussion, the following describes a method for improving the 'VRB to PRB mapping' method applied to frequency resource allocation in order to perform transmission and reception of PDSCH / PUSCH using frequency resources within a subband in time resources operating in SBFD during intra-carrier full duplex operation.

[0264] <PDSCH / PUSCH의 주파수 자원 할당을 위한 VRB to PRB 맵핑 (VRB-to-PRB mapping for frequency resource allocation of PDSCH / PUSCH)>

[0265] Downlink resource allocation type 1 (hereinafter referred to as 'resource allocation type 1' or 'type 1') for PDSCH transmission can be performed as follows.

[0266] In type 1 downlink resource allocation, resource block allocation information is allocated to the scheduled terminal with a size of N. BWP size Indicates (indicates) a set of non-interleaved or interleaved virtual resource blocks (VRBs) contiguously allocated within the active bandwidth portion (BWP), which is a PRB. An exception is when DCI format 1_0 is decoded in the common search space (CSS), in which case the size of CORESET 0 shall be used if the cell has CORESET 0 set, or the size of the initial DL bandwidth portion (IBWP) shall be used if the cell has not CORESET 0 set.

[0267] The downlink type 1 resource allocation field is the start VRB (RB start ) and consecutively allocated resource blocks L RBsIt can be composed of a resource indication value (RIV) corresponding to a length indicated by (or can include an RIV value). For example, if one RIV value is indicated, the number (i.e., length) of the starting VRB and the resource blocks consecutively allocated from the starting VRB can be derived from it. For example, the RIV can be defined as follows.

[0268] [Formula 1]

[0269]

[0270] Here, L RBs ≥1, and N BWP size - RB start does not exceed (where L RBs ≥1 and shall not exceed N BWP size - RB start ).

[0271] The DCI size for DCI format 1_0 of the UE-specific search space (USS) is derived from the size of DCI format 1_0 of CSS, but has a size of N. BWP active When applied to an active BWP, the downlink type 1 resource block allocation field is the starting resource block RB. start =0, K, 2K, ..., (N BWP initial -1) Resource indication value (RIV) corresponding to K and length L of virtually consecutively allocated resource blocks RBs =K, 2K, ..., N BWP initial It consists of K.

[0272] Here, N BWP initial The values ​​can be given as follows:

[0273] 1) The size of CORESET 0 if CORESET 0 is set in the cell, 2) The size of the initial DL bandwidth portion (BWP) if CORESET 0 is not set in the cell.

[0274] In this case, the RIV value can be defined by the following equation.

[0275] [Formula 2]

[0276]

[0277] Here, L' RBs =L RBs / K, RB' start = RB start / K and L' RBs is N BWP initial - RB' start Does not exceed .

[0278] N BWP active > N BWP initial Then, K is in the set {1, 2, 4, 8}. The maximum value satisfying K; otherwise, K=1.

[0279] When a scheduling grant is received via DCI format 1_2, the downlink type 1 resource allocation field is the starting resource block group RBG. start =0, 1, ..., N RBG -1 and virtually consecutively allocated resource block groups L RBGs =1, ..., N RBG It may be composed of a resource indication value (RIV) corresponding to a length indicated by (or may include) a RIV value. Here, the resource block groups are defined by P defined by a set upper layer parameter, or if the upper layer parameter is not set, P = 1.

[0280] In this case, RIV can be defined as follows:

[0281] [Formula 3]

[0282]

[0283] Here, L RBGs ≥1, and N RBG - RBG start Does not exceed .

[0284] According to the above, the terminal receives information about the VRBs (virtual resource blocks) used for PDSCH transmission from the base station for PDSCH frequency resource allocation. Through this, the terminal determines the VRB resources used for PDSCH transmission, and from these, determines the PRB resources used for PDSCH transmission. VRBs and PRBs are mapped 1:1, and there are two methods for VRB-to-PRB mapping: non-interleaved mapping and interleaved mapping.

[0285] Hereinafter, VRBs to which non-interleaved mapping is applied are called non-interleaved VRBs, and VRBs to which interleaved mapping is applied are called interleaved VRBs.

[0286] When non-interleaved mapping is applied, PRB index i is mapped to VRB index i in order.

[0287] When interleaved mapping is applied, the mapping between PRB and VRB is interleaved in units of the VRB bundle size.

[0288] For example, non-interleaved mapping and interleaved mapping operations can be performed as follows.

[0289] The terminal assumes / considers that virtual resource blocks (VRBs) are mapped to physical resource blocks (PRBs) according to the indicated mapping scheme (e.g., non-interleaved or interleaved mapping). If the mapping scheme is not indicated, the terminal assumes non-interleaved mapping.

[0290] For non-interleaved VRB to PRB mapping, VRB n is mapped to PRB n, except for PDSCH transmissions scheduled with DCI format 1_0 in the common search space, in which case VRB n is PRB n+N. start CORESET It is mapped to N start CORESET is the lowest numbered PRB in the coreset from which the DCI was received.

[0291] For interleaved VRB to PRB mapping, the mapping process can be defined as follows.

[0292] A resource block bundle can be defined as follows:

[0293] For PDSCH transmissions scheduled in DCI format 1_0 with CRC scrambled by SI-RNTI in Type0-PDCCH common search space, N of core set 0 BWP,init size The set of resource blocks is ordered by increasing resource block number and bundle number. It is divided into resource block bundles. Here, L=2 is the bundle size and N BWP,init size is the size of core set 0.

[0294] (N BWP,init size If mod L) is greater than 0, resource block bundle N bundle -1 is (N BWP,init sizemod L) resource blocks, otherwise it consists of L resource blocks. All other resource block bundles consist of L resource blocks.

[0295] Starting position is N BWP,i start For PDSCH transmissions scheduled with DCI format 1_0 in the common search space of bandwidth portion (BWP) i, VRBs {0,1,..., N} other than the Type0-PDCCH common search space of coreset 0 BWP,init size -1} is a set of N in increasing order of VRB number and virtual bundle number. bundle It is divided into VRB bundles of N BWP,init size A set of PRBs {N start CORESET , N start CORESET +1,..., N start CORESET + N BWP,init size -1} is N in increasing order of PRB number and physical bundle number. bundle It is divided into PRB bundles of N. Here, N BWP,init size is the size of core set 0 if core set 0 is set in the cell, and is the size of the initial downlink bandwidth part (initial DL BWP) if core set 0 is not set in the cell.

[0296] N bundle can be obtained by the following equation.

[0297] [Formula 4]

[0298]

[0299] In the above equation, L=2 is the bundle size, and N start CORESET is the lowest numbered PRB in the coreset from which the DCI was received.

[0300] Resource block bundle 0 is L-((N BWP,i start+ N start CORESET )mod L) consists of resource blocks. Resource block bundle N bundle -1 is ((N BWP,init size + N BWP,i start + N start CORESET )mod L) is greater than 0, then ((N BWP,init size + N BWP,i start + N start CORESET )mod L) resource blocks, otherwise it consists of L resource blocks. All other resource block bundles consist of L resource blocks.

[0301] For all other PDSCH transmissions, the starting position is N BWP,i start N of bandwidth part (BWP) i BWP,i size Resource blocks, in increasing order of resource block number and bundle number. It is divided into resource block bundles of L. Here, L i is the bundle size for bandwidth portion (BWP) i given by the upper layer parameter. Resource block bundle 0 is L i -(N BWP,i start mod L i ) consists of resource blocks. Resource block bundle N bundle -1 is ((N BWP,i start + N BWP,i size )mod L i ) is greater than 0, then ((N BWP,i start + N BWP,i size )mod L i ) consists of resource blocks, otherwise, L i It consists of resource blocks. All other resource block bundles are L i It consists of resource blocks.

[0302] Interval j∈{0, 1, ... N bundle -1}'s VRBs are mapped to PRBs as follows.

[0303] VRB Bundle N bundle -1 is PRB bundle N bundle -It is mapped to 1.

[0304] VRB bundle j∈{0, 1, ... N bundle -2} is mapped to PRB bundle f(j) as follows.

[0305] [Formula 5]

[0306]

[0307] The terminal is in L with a PRG (Physical Resource block Group) size of 4. i I don't expect it to be set to =2.

[0308] The terminal may assume that the same precoding is used within a PRB bundle in the frequency domain. The terminal does not assume that the same precoding is used for different bundles of common resource blocks.

[0309] For PUSCH transmission, only non-interleaved VRB to PRB mapping is used.

[0310] In the SBFD symbol, the UE can only use frequency resources within the DL subband for PDSCH reception, and only frequency resources within the UL subband for PUSCH transmission. When the base station indicates frequency resource information used for PDSCH transmission to the UE, PRB resources not included in the DL subband may be included and indicated. In this case, the UE will not be able to receive the PDSCH using all of the frequency resources indicated by the base station.

[0311] Meanwhile, when applying the aforementioned Resource Allocation (RA) Type 1 for PDSCH transmission, consecutive VRBs may be designated to be used for PDSCH transmission. At this time, when non-interleaved VRB to PRB mapping is applied, it is easy for the base station to designate VRBs for PDSCH reception such that only PRB resources included in DL subbands are selected. However, when interleaved VRB to PRB mapping is applied, since only consecutive VRB resources can be designated for PDSCH transmission in RA Type 1, it may be difficult for the base station to designate VRBs for PDSCH reception such that only PRB resources included in DL subbands are selected.

[0312] Considering these problems, it may be considered to improve the VRB to PRB mapping method applied in the SBFD symbol to indicate the frequency resources of the PDSCH to the base station so that the frequency resources through which the PDSCH is transmitted are composed of PRB resources existing within the DL subband.

[0313] Furthermore, although the frequency resources that can be used for PDSCH transmission in the SBFD symbol are limited to the frequency resources within the DL subband, the current standard performs frequency resource allocation based on the total amount of PRB resources within the DL BWP. Consequently, the field size (bit length) of the FDRA (Frequency Domain Resource Allocation) field within the DCI that schedules the PDSCH becomes unnecessarily large.

[0314] For example, if the DL BWP in the SBFD symbol consists of 100 RBs and the DL subband consists of 75 RBs, it is sufficient to indicate which of the 75 RBs are used for transmitting the PDSCH. However, the FDRA field of the current standard is configured to indicate which of the 100 RBs that constitute the DL BWP are used for transmitting the PDSCH, which unnecessarily increases the size of the FDRA field.

[0315] Considering these problems, it may be considered to reduce the size of the FDRA field by improving the VRB to PRB mapping method so that the frequency resources indicated for PDSCH transmission can only indicate PRBs existing within the DL subband.

[0316] Based on such discussion, the present disclosure describes a method for improving a VRB to PRB mapping method applied to frequency resource allocation in order to perform transmission and reception of PDSCH / PUSCH using resources within a subband in time resources operating in SBFD during full duplex operation within a carrier.

[0317] For convenience of explanation, the following describes an operation for indicating / determining the transmission frequency resource of PDSCH, but the contents of the present disclosure can also be applied to an operation for indicating / determining the transmission frequency resource of PUSCH.

[0318] The present disclosure assumes SBFD operation, where a cell performs DL and UL simultaneously using different frequency resources (e.g., subbands) within the same time resource. However, the contents of the present disclosure can also be applied when a cell performs SSFD operation.

[0319] Hereinafter, the base station may perform full duplex operation and the terminal may perform half duplex operation, or the base station may perform half duplex operation and the terminal may perform full duplex operation. Alternatively, both the base station and the terminal may support full duplex operation.

[0320] A terminal that is aware that the base station can perform full duplex operation may be collectively referred to as an FD-aware terminal hereinafter. A terminal that is aware that the base station can perform subband full duplex (SBFD) operation and has this information may be collectively referred to as an SBFD-aware terminal hereinafter. A terminal that is aware that the base station can perform spectrum shared (or subband overlapping) full duplex (SSFD) operation and has this information may be collectively referred to as an SSFD-aware terminal hereinafter.

[0321] If a base station supports both half-duplex and full-duplex operation, it can inform the terminal of the resources (time or frequency, or both) that can (or are expected to) perform half-duplex and full-duplex.

[0322] If a base station is capable of SSFD operation, and in the case of a full-duplex base station, UL reception may be possible simultaneously on some or all of the frequency resources available for DL ​​transmission at the base station. For example, some frequency resources may allow for UL reception / transmission as well as DL transmission / reception. In this case, in the case of SSFD, information about the frequency resources available for SSFD may be communicated. In addition, information about the time resources available for SSFD may be communicated.

[0323] For full duplex terminals, UL transmission is possible simultaneously on some / all frequency resources available for DL ​​reception of the terminal.

[0324] Hereinafter, a terminal performing half duplex operation may be referred to as an HD terminal, and a terminal capable of performing or performing full duplex operation may be referred to as an FD terminal.

[0325] When a base station performs full duplex operation such as SBFD or SSFD, it may perform SSFD and / or SBFD operation only for some time / frequency resources. In the case of SBFD-aware terminals and / or SSFD-aware terminals, if the cell knows the time / frequency resources on which the cell performs SSFD and / or SBFD operation, the cell may perform the operation of the terminal differently depending on the resource on which the cell operates in half duplex (HD), the resource on which the cell operates in SBFD, or the resource on which the cell operates in SSFD. For example, the terminal may perform transmission and reception by differently determining the time / frequency resource on which it performs reception of a DL signal / channel and / or transmission of a UL signal / channel as an HD resource, an SBFD resource, or an SSFD resource.

[0326] In the time resources operating in HD, the base station may perform a half-duplex operation in which only one of DL transmission or UL reception is performed across the frequency resources constituting the cell, and in the time resources operating in SBFD and SSFD, the base station may perform a full-duplex operation in which DL transmission is performed through a first frequency resource (e.g., a DL subband resource) within the frequency resources constituting the cell and UL reception is simultaneously performed through a second frequency resource (e.g., a UL subband resource) within the frequency resources constituting the cell.

[0327] To this end, the base station determines / determines time resources corresponding to the first time resource (e.g., HD symbol) and the second time resource (e.g., FD symbol) and transmits configuration information regarding the first time resource and / or the second time resource to the terminal. The FD symbol may include both the SBFD symbol and the SSFD symbol. More specifically, the base station determines / determines time resources corresponding to the HD symbol, the SBFD symbol, and / or the SSFD symbol, and transmits configuration information regarding the HD symbol, the SBFD symbol, and / or the SSFD symbol to the terminal.

[0328] At this time, the DL subband resources and / or UL subband resources may be configured differently in the time resources operating in SBFD and in the time resources operating in SSFD. In the time resources operating in SBFD, the DL subband resources and UL subband resources are configured so as not to overlap each other. In the time resources operating in SSFD, the DL subband resources and UL subband resources may be configured so as to overlap each other. The DL subband / UL subband resources may be configured with all frequency resources as well as some frequency resources of the system band.

[0329] The terminal receives configuration information about an HD symbol, an SBFD symbol, and / or an SSFD symbol from the network, and determines the positions of the HD symbol, the SBFD symbol, and / or the SSFD symbol. At this time, the terminal performs DL reception (UL transmission) through the entire frequency resources for which the terminal is configured to operate DL reception (UL transmission) in the HD symbol, and performs DL reception (UL transmission) through DL subband (UL subband) resources that are the same as or limited to the frequency resources for which the terminal performs DL reception (UL transmission) in the HD symbol in the SBFD symbol and / or SSFD symbol. In this case, even if the terminal is configured to perform DL reception (UL transmission) through frequency resources that do not correspond to DL subband resources (UL subband resources) in the SBFD symbol and / or SSFD symbol resources, the terminal does not perform DL reception (UL transmission) in the frequency resources that do not correspond to DL subband resources (UL subband resources).

[0330] A. VRB to PRB mapping in SBFD symbols

[0331] Among the PRB resources that constitute the DL BWP in the SBFD symbol, N PRBs can be included in the DL subband. At this time, the frequency resource through which the PDSCH is transmitted can be indicated among the N PRBs.

[0332] The terminal can receive information about the VRBs through which the PDSCH is transmitted from the base station for reception of the PDSCH in the SBFD symbol. In this case, the present disclosure proposes that among the PRB resources constituting the DL BWP, N PRB resources included in the DL subband are mapped 1:1 with N VRBs.

[0333] For example, in the present disclosure, N VRBs, such as VRBs #0, #1, #2, ..., #N-1, may be used for frequency resource allocation of PDSCH. In this case, it is proposed that the N VRBs are mapped 1:1 to N PRBs included in the DL subband among the PRB resources constituting the DL BWP.

[0334] The terminal can receive information from the base station about M (M<=N) VRBs among these N VRBs used for transmission of PDSCH.

[0335] A.1. Non-interleaved VRB to PRB mapping

[0336] When N VRBs are mapped to N PRB resources included in a DL subband, non-interleaved VRB to PRB mapping can be applied as follows.

[0337] Among the PRB resources that constitute the DL BWP, N PRB resources included in the DL subband are PRB #k0, #k1, #k2, ..., #k N-1 When , N VRBs VRB #0, #1, #2, ..., #N-1 are sequentially connected to PRB #k0, #k1, #k2, ..., #k N-1 are mapped to each.

[0338] Figure 18 shows an example of non-interleaved VRB to PRB mapping.

[0339] Referring to Fig. 18, among 44 PRB resources, N=32 PRBs are included in the DL subband. That is, PRBs #0 to #15 are included in DL subband 1, and PRBs #28 to #43 are included in DL subband 2. These N=32 PRBs are mapped to N VRBs in order from the lowest index.

[0340] A.2. Interleaved VRB to PRB Mapping

[0341] When N VRBs are mapped to N PRB resources included in a DL subband, interleaved VRB to PRB mapping can be applied as follows.

[0342] N included in the DL subband among the PRB resources that constitute the DL BWP RB PRB resources of dogs PRB #k0, #k1, #k2, ..., #k N-1 When N RB The PRB resources and VRB resources are grouped into N resource block bundles (RBB) of size RBB It can be bundled into dog bundles. At this time, N RBB The PRB bundles (PRBBs) of the dogs are N RBB It is mapped to the VRB bundles (VRBB).

[0343] At this time, interleaved mapping can be applied to the mapping between VRB bundles and PRB bundles. For example, when VRB bundle #n is mapped to PRB bundle #m and the RBB bundle size is L, the L VRBs included in VRB bundle #n are sequentially mapped in increasing order of RB index to the L VRBs included in PRB bundle #m.

[0344] For example, when VRB bundle #n consists of VRBs #8, #9, #10, and #11, and PRB bundle #m consists of PRBs #36, #37, #38, and #39, VRBs #8, #9, #10, and #11 are mapped to PRBs #36, #37, #38, and #39, respectively, in that order.

[0345] Figure 19 is an example in which interleaved mapping is applied to mapping between a VRB bundle (VRBB) and a PRB bundle (PRBB).

[0346] Referring to Figure 19, there are 32 PRBs included in the DL subband, and N RB = 32 PRBs N RBB= It consists of 8 PRBBs, and each RBB can be composed of L=4 RBs. At this time, the 8 PRBBs can be interleaved and mapped to 8 VRBBs.

[0347] At this time, N RB The RBs of the dog are N RBB When configuring a RB bundle, each RB bundle (RBB) can be configured as follows:

[0348] N RB PRBs and VRBs can be bundled in units of L, which is the RBB bundle size. For example, each RBB bundle can be composed of L RBs. Each VRBB can be composed of L consecutive VRBs, and each PRBB can be composed of L consecutive PRBs.

[0349] At this time, the boundary of the RBB can be configured based on the CRB (common resource block) location (e.g., based on the RB location relative to the CRB #0 location). For example, when the RBB bundle size is L, one RBB can be configured by bundling L RBs based on the CRB #0 location.

[0350] In this case, N RB N with PRBs of dogs RBB When configuring RBBs, RBBs located at the boundaries of DL subbands may be composed of fewer than L RBs. Based on the boundary of an RBB formed by grouping L consecutive RBs based on the CRB#0 position, if only some PRBs within a specific RBB boundary are included in the DL subband, the RBB is composed only of PRBs included in the DL subband. In this case, the size of the RBB may be smaller than L.

[0351] Figure 20 is an example of mapping between VRBB and PRBB.

[0352] Referring to Fig. 20, there is one DL subband in the SBFD symbol, and 32 PRBs from PRB #12 to #43 can constitute the DL subband. When the RBB bundle size L is 4, the boundary of the PRBB, which groups L RBs as a unit, and the boundary of the DL subband are misaligned, so N RBs are included in the DL subband. RB = Among the PRBBs composed of 32 PRBs, the first PRBB and the last PRBB may be composed of a smaller number of RBs than the L RBs.

[0353] For example, N included in the DL subband in Fig. 20 RB = 32 PRBs N RBB = It consists of 9 PRBBs, of which the 0th (PRBB 0) and the 8th PRBB (PRBB 8) consist of 2 PRBs, and the remaining PRBBs consist of L=4 PRBs.

[0354] Figure 21 is another mapping example of VRBB and PRBB.

[0355] Referring to FIG. 21, there are two DL subbands in the SBFD symbol, and DL subband 1 and DL subband 2 can be composed of PRBs PRB #0 to #15 and PRB #28 to #43, respectively.

[0356] When the RBB bundle size L is 4, in Fig. 21, the boundary of the PRBB that groups L RBs into units and the boundary of the DL subband 1 and DL subband 2 are misaligned, so that N included in the DL subband RB = Among the PRBBs composed of 32 PRBs, PRBBs 0, 4, 5, and 9 can each be composed of only 2 PRBs.

[0357] N included in the DL subband in Fig. 21 RB = 32 PRBs N RBB= It consists of 10 PRBBs, of which PRBBs 0, 4, 5, and 9 consist of 2 PRBs, and the remaining PRBBs consist of L=4 PRBs.

[0358] At this time, more specifically N RBB The VRBBs of the dog are as follows: N RBB can be mapped to VRBBs.

[0359] Method A.

[0360] N RBB The VRBBs of the dog are as follows: N RBB can be mapped to VRBBs of the following N bundle can correspond to the RBB bundle size (L).

[0361] For example, interval j∈{0, 1, ... N bundle In the VRBs of {-1}, VRB bundle N bundle -1 is PRB bundle N bundle -1 is mapped to VRB bundle j∈{0, 1, ... N bundle -2} is mapped to PRB bundle f(j) as follows.

[0362] [Formula 6]

[0363]

[0364] When the RBB bundle size is equal to L, some PRBBs (e.g., PRBBs located at the boundaries of DL subbands) may be composed of fewer than L PRBs. In this case, VRBB #n is mapped to PRBB #m, and the number of PRBs constituting PRBB #m is L m When , the number of VRBs that make up VRBB #n is L m It is the same as .

[0365] As shown in Fig. 20, there is one DL subband, and N is included in the DL subband. RB = 32 PRBs N RBB= can be composed of 9 PRBBs. At this time, the RBB bundle size L can be equal to 4. However, PRBBs located at the DL subband boundary can be composed of fewer PRBs than L=4. In the example of Fig. 20, the first PRBB and the last PRBB each consist of 2 PRBs.

[0366] At this time, N according to the VRBB to PRBB mapping method RBB = 9 PRBBs and N RBB = 9 VRBBs can be mapped. For example, the last (N RBB - 1st) VRBB is the last (N RBB - 1st) is mapped to RRBB, and for the remaining VRBBs, the jth VRBB can be mapped to the f(j)th PRBB.

[0367] According to the above method, the 0th PRBB is mapped to the 0th VRBB, and the last (8th) PRBB is mapped to the last (8th) VRBB. Therefore, the 0th VRBB and the last (8th) VRBB are composed of 2 VRBs, and the remaining VRBBs are composed of L=4 VRBs.

[0368] Alternatively, as in Fig. 21, there are two DL subbands and N included in the two DL subbands RB = 32 PRBs N RBB = It can be composed of 10 PRBBs. At this time, the RBB bundle size L can be equal to 4. However, PRBBs located at the DL subband boundary can be composed of a smaller number of PRBs than L=4. In the example of Fig. 21, PRBBs 0, 4, 5, and 9 located at the DL subband boundary are each composed of 2 PRBs.

[0369] At this time, N according to the VRBB to PRBB mapping method RBB = 10 PRBBs and N RBB= 10 VRBBs can be mapped. For example, the last (N RBB - 1st) VRBB is the last (N RBB - 1st) is mapped to RRBB, and for the remaining VRBBs, the jth VRBB can be mapped to the f(j)th PRBB.

[0370] At this time, according to the above method, the 0th PRBB is mapped to the 0th VRBB, and the last (9th) PRBB is mapped to the last (9th) VRBB.

[0371] At this time, as shown in Fig. 21, the VRBBs mapped to PRBBs 0, 4, 5, and 9 located at the boundaries of the DL subband are each composed of 2 VRBs, and the remaining VRBBs are composed of L=4 VRBs.

[0372] Method B.

[0373] PRBB and VRBB with the same index can be made up of the same number of RBs. For example, PRBB #m and VRBB #m have the same L m It can be composed of RBs.

[0374] Considering this, if a specific PRBB #n is located at the boundary of a DL subband, the PRBB #n can be mapped to VRBB #n. The remaining PRBBs and VRBBs can be mapped in an interleaved manner.

[0375] Figure 22 is another mapping example of VRBB and PRBB.

[0376] Referring to FIG. 22, PRBBs 0, 4, 5, and 9 located at the boundaries of DL subband 1 and DL subband 2 can be mapped to VRBBs 0, 4, 5, and 9 in that order, respectively. The remaining PRBBs and VRBBs can be mapped in an interleaved manner.

[0377] Method C.

[0378] In the SBFD symbol, if there is a terminal that cannot receive the PDSCH of the DL signal / channel across two DL subbands that are discontinuously located, or if the frequency resource on which the PDSCH is transmitted is to be limited, a method may be considered in which interleaved mapping is performed on the frequency resource on which the PDSCH is transmitted, but interleaving is performed only within the same DL subband. Taking this into account, in addition to the aforementioned method B, interleaving may be performed only within PRBBs existing in the same DL subband.

[0379] Figure 23 shows another mapping example of VRBB and PRBB.

[0380] Referring to Fig. 23, there are A PRBBs in DL subband 1 and (N) in DL subband 2. RBB - When A PRBBs exist, A PRBBs existing in DL subband 1 are interleaved and mapped to A VRBBs corresponding to VRBBs #0, #1, ..., #A-1 and (N) existing in DL subband 2. RBB - A) The PRBBs are VRBB #A, #A+1, ..., # N RBB (N corresponding to -1 RBB - A) It can be mapped interleaved to VRBBs.

[0381] At this time, if a specific PRBB #n is located at the boundary of a DL subband, the PRBB #n can be mapped to VRBB #n. The remaining PRBBs and VRBBs can be mapped in an interleaved manner.

[0382] For example, as shown in FIG. 23, PRBBs 0, 4, 5, and 9 located at the boundaries of DL subband 1 and DL subband 2 can be mapped to VRBBs 0, 4, 5, and 9 in that order, respectively. In addition, PRBBs #1, #2, and #3 located within DL subband 1 can be interleaved and mapped to VRBBs #1, #2, and #3, and PRBBs #6, #7, and #8 located within DL subband 2 can be interleaved and mapped to VRBBs #6, #7, and #8.

[0383] A.3. VRB to PRB Mapping for Resource Allocation Type 0

[0384] In existing standards, VRB to PRB mapping is applied when RA (resource allocation) type 1 is applied for PDSCH / PUSCH transmission. In the present disclosure, VRB to PRB mapping is proposed to be applied even when RA type 0 is applied for PDSCH / PUSCH transmission.

[0385] When RA type 0 is applied to transmit PDSCH, the index information of RBG used for transmitting PDSCH is indicated in bitmap format.

[0386] In this disclosure, even when RA Type 0 is applied for PDSCH transmission, we propose to map PRBs included in DL subbands to VRBs by applying VRB to PRB mapping. In this case, the non-interleaved VRB to PRB mapping proposed in Section A.1 above may be applied.

[0387] After this, the terminal can be instructed in bitmap format the index information of the VRB group used for PDSCH transmission through the FDRA field in the DCI that schedules the PDSCH. In this case, the terminal determines the PRBs corresponding to the VRBs included in the instructed VRB groups as PRBs used for PDSCH transmission.

[0388] B. Apply different VRB to PRB mapping methods depending on SBFD / non-SBFD symbols.

[0389] When applying the existing interleaved VRB to PRB mapping for PDSCH transmission, it is difficult to perform frequency-domain resource allocation so that only PRB resources included in the DL subband are indicated in the SBFD symbol. Considering this point, the present disclosure proposes to determine the VRB to PRB mapping method applied differently depending on the symbol type (SBFD or non-SBFD) of the time resource on which the PDSCH is transmitted.

[0390] When a terminal receives a specific PDSCH, it may be instructed that interleaved VRB to PRB mapping has been applied for PDSCH transmission. In this case, the terminal may determine the VRB to PRB mapping method to be applied differently depending on the symbol type (SBFD or non-SBFD) of the time resource on which the PDSCH is transmitted.

[0391] For example, if the PDSCH is transmitted in a non-SBFD symbol, the terminal can determine that interleaved VRB to PRB mapping is applied as instructed and determine the frequency resource on which the PDSCH is transmitted.

[0392] If the PDSCH is transmitted in a non-SBFD symbol, the terminal can determine that interleaved VRB to PRB mapping is applied as instructed and determine the frequency resource on which the PDSCH is transmitted.

[0393] C. How to determine FDRA field size

[0394] Hereinafter, when applying the contents of the present disclosure such as the aforementioned Section A, a method for determining the field size (bit length) of the FDRA field in the DCI in which the PDSCH is scheduled when the terminal determines the transmission frequency resource of the PDSCH scheduled from the base station is described.

[0395] As described in Section A above, the number of VRBs that can be used for resource allocation may vary depending on the symbol type (SBFD or non-SBFD) of the symbol resource on which the PDSCH is transmitted. For example, in a non-SBFD symbol, there are as many VRBs as the number of PRBs that constitute the DL BWP as before, whereas in an SBFD symbol, there may be as many VRBs as the number of PRBs included in the DL subbands within the DL BWP.

[0396] In this case, if the symbol type of the symbol through which the PDSCH is transmitted is an SBFD symbol, the number of VRBs used for frequency resource allocation of the PDSCH is N. VRB_SBFD Let N be the number of VRBs used for frequency resource allocation of PDSCH when the symbol type of the symbol through which PDSCH is transmitted is a non-SBFD symbol. VRB_non-SBFD It is said.

[0397] And, below, the number of VRBs N VRB_non-SBFD The field size (bit length) of the FDRA field required when performing frequency resource allocation based on is called 'BitSize1', and the number of VRBs is N. VRB_SBFD Let the field size (bit length) of the FDRA field required when performing frequency resource allocation based on 'BitSize2'.

[0398] At this time, when the terminal additionally determines the transmission frequency resources of the PDSCH scheduled from the base station, the RBG size used for frequency resource allocation of the PDSCH can be determined differently depending on the symbol type of the symbol through which the PDSCH is transmitted. When receiving the PDSCH, the terminal can determine the RBG size of the PDSCH as follows.

[0399] 1) If the symbol type of the symbol through which PDSCH is transmitted is an SBFD symbol, the RBG size applied to the frequency resource allocation of PDSCH is P SBFD It can be judged as such.

[0400] 2) If the symbol type of the symbol through which the PDSCH is transmitted is a non-SBFD symbol, the RBG size applied to the frequency resource allocation of the PDSCH is P non-SBFD It can be judged as such.

[0401] In this case, the number of VRBs in the present disclosure is N VRB_non-SBFD Frequency resource allocation is performed based on the RBG size P non-SBFD The field size (bit length) of the FDRA field required when allocating frequency resources based on is called 'BitSize1'. Also, the number of VRBs N VRB_SBFD Frequency resource allocation is performed based on the RBG size P SBFD The field size (bit length) of the FDRA field required when allocating frequency resources based on is called 'BitSize2'.

[0402] In the present disclosure, the terminal determines that the field size (bit length) of the FDRA field within the DCI in which the PDSCH is scheduled is equal to max(BitSize1, BitSize2). This is because the terminal cannot determine in advance the symbol type of the symbol in which the PDSCH scheduled by the DCI is transmitted, and therefore the terminal cannot specify the field size (bit length) of the FDRA field as 'BitSize1' or 'BitSize2'.

[0403] When a terminal receives a DCI in which a PDSCH is scheduled and determines that the symbol type of the symbol in which the PDSCH is transmitted is a non-SBFD symbol, among the bits composing the FDRA field of the DCI, the terminal determines that 'BitSize1' bits from the front (or back) are actually valid bits and uses the bits to determine the allocated frequency resources.

[0404] Alternatively, if the terminal receives a DCI in which a PDSCH is scheduled and determines that the symbol type of the symbol in which the PDSCH is transmitted is an SBFD symbol, among the bits configuring the FDRA field of the DCI, the terminal may determine that 'BitSize2' bits from the front (or back) are actually valid bits and use the bits to determine the allocated frequency resources.

[0405] At this time, the terminal can determine the symbol type of the symbol through which the PDSCH is transmitted as follows. 1) It may mean the symbol type of the symbols determined to be the symbols through which the PDSCH is transmitted, as indicated through the TDRA field of the DCI that schedules the PDSCH. 2) Or, it may mean the symbol type assumed for transmission of the PDSCH, as indicated by the DCI that schedules the PDSCH. For this purpose, information about the symbol type assumed by the terminal for transmission of the PDSCH may be indicated through the DCI.

[0406] Below, a RIV indication method for indicating a transmission frequency resource of a PDSCH using resources within two DL subbands in a time resource operating in SBFD during full duplex operation within a carrier is described.

[0407] When Resource Allocation (RA) Type 1 is applied for PDSCH transmission, consecutive VRBs can be designated to be used for PDSCH transmission. However, if non-interleaved VRB to PRB mapping is applied, it is impossible for the base station to designate VRBs for PDSCH reception by designating a single RIV value so that only PRB resources spanning two DL subbands are selected.

[0408] Additionally, when interleaved VRB to PRB mapping is applied, in RA type 1, only consecutive VRB resources can be indicated for transmission of PDSCH, so it is difficult for the base station to indicate VRBs for reception of PDSCH so that only PRB resources included in the DL subband are selected.

[0409] Considering these problems, it is necessary to improve the indication method of RIV in the SBFD symbol so that the base station indicates the frequency resources of the PDSCH so that the frequency resources through which the PDSCH is transmitted are composed of PRB resources existing within the DL subband.

[0410] For convenience of explanation, the following describes an operation for indicating / determining the transmission frequency resource of PDSCH, but the contents of the present disclosure can also be applied to an operation for indicating / determining the transmission frequency resource of PUSCH.

[0411] A. Two RIV indications in SBFD symbol

[0412] Figure 24 illustrates a case where two DL subbands exist in an SBFD symbol when a cell performs SBFD operation.

[0413] Referring to FIG. 24, each DL subband is composed of consecutive RB resources and can be located at both edge portions of the cell.

[0414] A UE can receive a PDSCH using frequency resources within a DL subband in an SBFD time resource. The UE cannot receive a PDSCH in frequency resources outside of a DL subband. When a PDSCH is transmitted by a base station in such an SBFD symbol, such a PDSCH may be transmitted across two DL subbands. For example, a single PDSCH may be transmitted across PRB resources included in DL subband 1 and PRB resources included in DL subband 2.

[0415] Considering these cases, for PDSCH transmitted in SBFD time resources, the frequency resources used for transmission may be composed of two sets of frequency resources. For example, 'Frequency Resource Set 1' may be composed of frequency resources within DL subband 1, and 'Frequency Resource Set 2' may be composed of frequency resources within DL subband 2.

[0416] For this operation, with respect to frequency resources through which PDSCH is transmitted, the terminal can receive information about two sets of frequency resource information, 'frequency resource set 1' and 'frequency resource set 2', from the base station.

[0417] At this time, 'frequency resource set 1' and 'frequency resource set 2' may each be composed of multiple RB or RBG resources.

[0418] The terminal determines that the PDSCH is transmitted through the 'frequency resource set 1' and 'frequency resource set 2' locations determined according to the method proposed in this disclosure in the SBFD time resource, and can perform reception of the PDSCH.

[0419] Meanwhile, according to the existing standard, when resource allocation (RA) type 1 is used to indicate PRB information to be transmitted by PDSCH, the resource indication value (RIV) value can be indicated from the base station to the terminal through DCI that schedules the PDSCH.

[0420] When resource allocation by RB unit is applied, the terminal selects RB from the indicated RIV value. start (Index of starting VRB) value and L RBs (The length of VRBs allocated consecutively) can be determined. The terminal can use this to determine the RB start Continuous L from the VRB position corresponding to RBsIt can be determined that the VRBs of the dog are used for transmission of PDSCH.

[0421] Or, if resource allocation is applied by RB group (RBG) unit, the terminal selects RBG from the indicated RIV value. start (Index of starting VRBG) value and L RBGs (The length of the VRBGs allocated consecutively) can be determined. The terminal can use this to determine the RBG start Continuous L from the VRBG position corresponding to RBGs It can be determined that the VRBGs of the dog are used for transmission of PDSCH.

[0422] As described above, when a terminal is instructed of two sets of frequency resource information from a base station with respect to frequency resources through which PDSCH is transmitted, the terminal can be instructed of two RIV information, i.e., RIV 1 and RIV 2 values, from the base station for information of 'frequency resource set 1' and 'frequency resource set 2'. The terminal can determine frequency resources constituting 'frequency resource set 1', which is a continuous RB resource located in DL subband 1, and 'frequency resource set 2', which is a continuous RB resource located in DL subband 2, from RIV 1 and RIV 2, respectively.

[0423] At this time, the terminal receives RB from the RIV1 and RIV2 values ​​respectively. start Value and L RBs The value can be judged. Below, RB obtained from RIV 1 start Wow L RBs Each value is RB start _1 and L RBs _1, and RB obtained from RIV 2 start Wow L RBs Each value is RB start _2 and L RBs It's called _2.

[0424] In some embodiments, the terminal may output RBG from each RIV value. start Value and L RBGsThe value can be judged. In this case, the RBG obtained from RIV 1 start Wow L RBGs Each value is RBG start _1 and L RBGs _1, and RBG obtained from RIV 2 start Wow L RBGs Each value is RBG start _2 and L RBGs It's called _2.

[0425] Figure 25 shows an example of determining RBGs through which PDSCH is transmitted using the indicated RIV 1 and RIV 2 values.

[0426] Referring to FIG. 25, the terminal can determine RBGs in which PDSCH is transmitted within DL subband 1 through RIV 1, and can determine RBGs in which PDSCH is transmitted within DL subband 2 through RIV 2. In other words, RBGs indicated through RIV 1 are located within DL subband 1, and RBGs indicated through RIV 2 are located within DL subband 2.

[0427] The terminal receives two RIV values ​​from the base station as follows, and can determine the frequency resource on which the PDSCH is transmitted.

[0428] For convenience of explanation, the following describes a case where a terminal configures PDSCH transmission frequency resources on an RB basis. However, the contents of the present disclosure can also be applied equally to a case where a terminal configures PDSCH transmission frequency resources on an RBG basis.

[0429] Approach 1. Method using conventional VRB to PRB mapping

[0430] The number of PRBs that make up the DL BWP (i.e., the size of the DL BWP) is N BWP size When N is used to constitute DL BWP according to the existing standard specifications, BWP sizeN PRBs of dogs BWP size It can be mapped to VRBs (virtual resource blocks).

[0431] The terminal receives RIV 1 and RIV 2 values ​​from the base station, and from these, can determine frequency resources constituting 'frequency resource set 1', which is a continuous RB resource located in DL subband 1, and 'frequency resource set 2', which is a continuous RB resource located in DL subband 2.

[0432] At this time, a non-interleaved VRB to PRB mapping method may be used so that VRBs determined from RIV 1 are located in DL subband 1 and VRBs determined from RIV 2 are located in DL subband 2.

[0433] For example, if a terminal receives two RIV values ​​from a base station and determines frequency resources located in each DL subband from these, this operation method can be applied only when a non-interleaved VRB to PRB mapping method is used.

[0434] More specifically, the terminal can determine the 'frequency resource set 1' and 'frequency resource set 2' through which the PDSCH is transmitted through the RIV values ​​instructed as follows.

[0435] Method 1-1. Indicate the position of RB relative to the starting point of DL BWP.

[0436] The terminal receives RIV 1 and RIV 2 from the base station, and through this, RB start _1 and L RBs _1 and RB start _2 and L RBs _2 value can be judged.

[0437] At this time, the corresponding RB from each RIV value start Wow L RBsThe way to determine the value can follow the below. For example, RB is used to determine the value of two RIV values, RIV 1 and RIV 2. start _1 and RB start _2 represents the VRB index.

[0438] The terminal is RB start Continuous L from VRB corresponding to _1 RBs _1 VRBs are considered to constitute frequency resource set 1. In addition, the terminal determines that RB start _2 from the VRB corresponding to the continuous L RBs _It is determined that two VRBs constitute frequency resource set 2. At this time, the contents described in Equations 1 and 2 above can be applied.

[0439] Method 1-2. Indicate the position of RB relative to the starting point of the DL subband.

[0440] The terminal receives RIV 1 and RIV 2 from the base station, and through this, RB start _1 and L RBs _1 and RB start _2 and L RBs _2 value can be judged.

[0441] At this time, RB start The _1 value may indicate the RB position relative to the lowest PRB position included in DL subband 1. In this case, the terminal may start The value obtained by adding the index of the lowest PRB constituting DL subband 1 to the index indicated by _1 can be determined as the lowest VRB index constituting frequency resource set 1.

[0442] For example, the terminal is RB start _1' = RB start Consecutive L from VRB with index _1 + offset_1 RBs_1 VRBs are determined to constitute frequency resource set 1. At this time, offset_1 may be equal to the index of the lowest PRB constituting DL subband 1. At this time, considering that DL subband 1 is located at the lower edge of the frequency resources constituting the cell, offset_1 may always be equal to 0.

[0443] RB start The _2 value may indicate the RB position relative to the lowest PRB position included in DL subband 2. In this case, the terminal may start The value obtained by adding the index of the lowest PRB constituting DL subband 2 to the index indicated by _2 can be determined as the lowest VRB index constituting frequency resource set 2.

[0444] For example, the terminal is RB start _2' = RB start Consecutive L from VRB with index _2 + offset_2 RBs _It is determined that two VRBs constitute frequency resource set 2. At this time, offset_2 may be equal to the index of the lowest PRB constituting DL subband 2.

[0445] In this case, the RIV value is RB start and L RBs N used to map to values BWP size The value can be replaced by the number of PRBs constituting each corresponding DL subband.

[0446] RIV 1 value RB start _1 and L RBs N used to map to the _1 value BWP size The value is the number of PRBs constituting DL subband 1 (N RB subbnad1 ) can be replaced with.

[0447] RIV 2 value RB start _2 and LRBs N used to map to _2 values BWP size The value is the number of PRBs (N) that constitute DL subband 2. RB subbnad2 ) can be replaced with.

[0448] In this case, the range of values ​​that RIV can hold becomes smaller than in Method 1. Therefore, fewer bits can be used to indicate RIV than in Method 1.

[0449] Approach 2: Improved VRB to PRB Mapping

[0450] The number of PRBs that make up the DL BWP (i.e., the size of the DL BWP) is N BWP size When N is used to constitute DL BWP according to the existing standard specifications, BWP size N PRBs of dogs BWP size It can be mapped to VRBs (virtual resource blocks).

[0451] The terminal receives RIV 1 and RIV 2 from the base station, and through this, RB start _1 and L RBs _1 and RB start _2 and L RBs _2 value can be judged.

[0452] RB used to determine the values ​​of two RIV values, RIV 1 and RIV 2 start _1 and RB start _2 represents the VRB index.

[0453] At this time, an improved VRB to PRB mapping compared to the existing one can be used to ensure that only frequency resources existing within the DL subband are indicated through RIV.

[0454] Non-interleaved VRB to PRB mapping

[0455] Among the PRB resources that constitute the DL BWP, N PRB resources included in the DL subband can be mapped 1:1 with N VRBs.

[0456] When N VRBs are mapped to N PRB resources included in a DL subband, non-interleaved VRB to PRB mapping can be applied as follows.

[0457] Among the PRB resources that constitute the DL BWP, N PRB resources included in the DL subband are PRB #k0, #k1, #k2, ..., #k N-1 When , N VRBs VRB #0, #1, #2, ..., #N-1 are sequentially connected to PRB #k0, #k1, #k2, ..., #k N-1 are mapped to each.

[0458] Figure 26 illustrates non-interleaved VRB to PRB mapping.

[0459] Referring to Figure 26, among the 44 PRB resources, N=32 PRBs are included in the DL subband. These N=32 PRBs are mapped to N VRBs in order from the lowest index.

[0460] When applying the VRB to PRB mapping method as described above, only RPBs included in the DL subband can be mapped to the VRB. The number of PRBs included in the DL subband among the PRBs existing in the DL BWP is N RB subband When N RB subband There are VRBs of which N RB subband N VRBs included in the DL subband RB subband The PRBs of the dog are mapped.

[0461] Interleaved VRB to PRB Mapping

[0462] When N VRBs are mapped to N PRB resources included in a DL subband, interleaved VRB to PRB mapping can be applied as follows.

[0463] N included in the DL subband among the PRB resources that constitute the DL BWP RB PRB resources of dogs PRB #k0, #k1, #k2, ..., #k N-1 When N RB N PRB resources and VRB resources are grouped into RB bundle (RBB) size units. RBB You can bundle them together. At this time, N RBB The PRB bundles (PRBBs) of the dogs are N RBB It is mapped to the VRB bundles (VRBB).

[0464] At this time, interleaved mapping can be applied to the mapping between the VRB bundle and the PRB bundle.

[0465] For example, when VRB bundle #n is mapped to PRB bundle #m and the RBB bundle size is L, the L VRBs included in VRB bundle #n are sequentially mapped to the L VRBs included in PRB bundle #m in increasing order of RB index. For example, when VRB bundle #n is composed of VRBs #8, #9, #10, and #11 and PRB bundle #m is composed of PRBs #36, #37, #38, and #39, VRBs #8, #9, #10, and #11 are sequentially mapped to PRBs #36, #37, #38, and #39, respectively.

[0466] At this time, more specifically N RB The RBs of the dog are N RBB When configuring a RB bundle, each RB bundle (RBB) can be configured as follows:

[0467] N RBPRBs and VRBs can be bundled in units of RBB bundle size L. For example, each RBB bundle can be composed of L RBs. Each VRBB can be composed of L consecutive VRBs, and each PRBB can be composed of L consecutive PRBs.

[0468] At this time, the boundary of the RBB can be configured based on the CRB position (e.g., based on the RB position relative to the CRB #0 position). For example, when the RBB bundle size is L, one RBB can be configured by bundling L RBs based on the CRB #0 position.

[0469] In this case, N RB N with PRBs of dogs RBB When configuring PRBBs, RBBs located at the boundaries of DL subbands may be composed of fewer than L RBs. With respect to the boundaries of RBBs formed by grouping L consecutive RBs based on the CRB#0 position, if only some PRBs within a specific RBB boundary are included in the DL subband, then the RBB is composed only of PRBs included in the DL subband. In this case, the size of the RBB may be smaller than L.

[0470] N RBB The VRBBs of the dog are as follows: N RBB It can be mapped to the PRBBs of the dog.

[0471] PRBB and VRBB with the same index can be made up of the same number of RBs. For example, PRBB #m and VRBB #m have the same L m It can be composed of RBs.

[0472] Considering this, if a specific PRBB #n is located at the boundary of a DL subband, the PRBB #n can be mapped to VRBB #n. The remaining PRBBs and VRBBs can be mapped in an interleaved manner.

[0473] Additionally, interleaving can only be performed within PRBBs existing in the same DL subband. For example, if there are A PRBBs in DL subband 1 and (N) PRBBs in DL subband 2, RBB - When A PRBBs exist, A PRBBs existing in DL subband 1 are interleaved and mapped to A VRBBs corresponding to VRBBs #0, #1, ..., #A-1 and (N) existing in DL subband 2 RBB - A) The PRBBs of the dogs are VRBB #A, #A+1, ..., # N RBB (N corresponding to -1 RBB - A) It can be mapped interleaved to VRBBs.

[0474] Figure 27 illustrates the mapping between VRBB and PRBB.

[0475] Referring to FIG. 27, PRBBs #0, #4, #5, and #9 located at the boundaries of DL subband 1 and DL subband 2 can be mapped to VRBBs #0, #4, #5, and #9 in that order, respectively. In addition, PRBBs #1, #2, and #3 located within DL subband 1 can be interleaved and mapped to VRBBs #1, #2, and #3, and PRBBs #6, #7, and #8 located within DL subband 2 can be interleaved and mapped to VRBBs #6, #7, and #8.

[0476] In this case, VRBs determined by the terminal based on RIV 1 may be mapped to PRBs located within DL subband 1. Additionally, VRBs determined by the terminal based on RIV 2 may be mapped to PRBs located within DL subband 2.

[0477] More specifically, the terminal can determine the 'frequency resource set 1' and 'frequency resource set 2' through which the PDSCH is transmitted through the RIV values ​​instructed as follows.

[0478] Method 2-1. Indicate the position of VRB relative to VRB #0

[0479] The terminal receives RIV 1 and RIV 2 from the base station, and through this, RB start _1 and L RBs _1 and RB start _2 and L RBs _2 value can be determined. At this time, RB is used to determine the values ​​of two RIV values, RIV 1 and RIV 2. start _1 and RB start _2 represents the VRB index.

[0480] When using the improved VRB to PRB mapping described above, VRB is N RB subband There are as many as dogs. At this time, N RB subband refers to the number of RBs located within the DL subband among the RBs existing within the DL BWP.

[0481] Therefore, each RIV value is RB start and L RBs N used to map to values BWP size The value is N, the number of RBs located within the DL subband. RB subband can be replaced with

[0482] For example, RIV 1 value is RB start _1 and L RBs N used to map to the _1 value BWP size The value is N, the number of RBs located within the DL subband. RB subband can be replaced with

[0483] RIV 2 value RB start _2 and L RBs N used to map to _2 values BWP size The value is N, the number of RBs located within the DL subband. RBsubband can be replaced with

[0484] Method 2-2. Indicates the position of the VRB relative to the lowest VRB position mapped to the DL subband.

[0485] The terminal receives RIV 1 and RIV 2 from the base station, and through this, RB start _1 and L RBs _1 and RB start _2 and L RBs _2 value can be judged.

[0486] At this time, RB start The _1 value may mean the VRB position relative to the lowest VRB position among the VRBs mapped to the PRBs included in DL subband 1. In this case, the terminal may start The value obtained by adding the index of the lowest VRB among the VRBs mapped to the PRBs included in DL subband 1 to the index indicated by _1 can be determined as the lowest VRB index constituting frequency resource set 1.

[0487] For example, the terminal is RB start _1' = RB start Consecutive L from VRB with index _1 + offset_1 RBs _1 VRBs are determined to constitute frequency resource set 1. At this time, offset_1 may be equal to the index of the lowest VRB among the VRBs mapped to PRBs included in DL subband 1. At this time, considering that DL subband 1 is located at the lower edge of the frequency resources constituting the cell, offset_1 may always be equal to 0.

[0488] RB start The _2 value may mean the VRB position relative to the lowest VRB position among the VRBs mapped to the PRBs included in DL subband 2. In this case, the terminal may startThe value obtained by adding the index of the lowest VRB among the VRBs mapped to the PRBs included in DL subband 2 to the index indicated by _2 can be determined as the lowest VRB index constituting frequency resource set 2.

[0489] For example, the terminal is RB start _2' = RB start Consecutive L from VRB with index _2 + offset_1 RBs _It is determined that 2 VRBs constitute frequency resource set 2. At this time, offset_2 may be equal to the index of the lowest VRB among the VRBs mapped to PRBs included in DL subband 2. At this time, offset_2 is the number of PRBs constituting DL subband 1 (N RB subband1 ) may be the same.

[0490] In this case, the RIV value is RB start and L RBs N used to map to values BWP size The value can be replaced by the number of PRBs constituting each corresponding DL subband.

[0491] RIV 1 value RB start _1 and L RBs N used to map to the _1 value BWP size The value is the number of PRBs constituting DL subband 1 (N RB subband1 ) can be replaced with.

[0492] RIV 2 value RB start _2 and L RBs N used to map to _2 values BWP size The value is the number of PRBs constituting DL subband 2 (N RB subband2 ) can be replaced with.

[0493] In this case, the range of values ​​that RIV can hold becomes smaller than in Method 1. Therefore, fewer bits can be used to indicate RIV than in Method 1.

[0494] Approach 3. Start / End PRB / RBG Index

[0495] The following resource allocation method of frequency resources for PUSCH transmission can be supported.

[0496] Resource allocation information for uplink resource allocation type 1 can indicate two sets of resource blocks to the scheduled terminal. In this case, each set is N RB UL It includes one or more consecutive resource block groups given based on the value assuming the system bandwidth, and the size of each resource block group is P.

[0497] The combination index r is It can be composed of bits. The bits in the resource allocation field of the scheduling grant represent r, except that the number of bits in the resource allocation field of the scheduling grant is as follows.

[0498] 1) If it is smaller than necessary to completely represent r, in which case the bits in the resource allocation field of the scheduling grant occupy the LSBs of r and the remaining bits of r are assumed to have values ​​of 0; or 2) If it is larger than necessary to completely represent r, in which case r occupies the LSBs of the resource allocation field of the scheduling grant.

[0499] The combination index r corresponds to the start and end RBG indices s0, s1-1 of resource block set 1 and the start and end RBG indices s2, s3-1 of resource block set 2. Here, r can be given by the following equation.

[0500] [Formula 7]

[0501]

[0502] In equation 7, M = 4, and N is given by the following equation.

[0503] [Formula 8]

[0504]

[0505] If the last RBG index is equal to the starting RBG index, only one RBG can be allocated for the set of starting RBG indices.

[0506] The above method can be used to indicate PDSCH transmission resources in SBFD symbols.

[0507] Instead of indicating the RIV value as before to indicate the continuous frequency resources on which the PDSCH is transmitted, the location of the starting PRB (RBG) resource and the location of the ending PRB (RBG) resource that constitute the continuous frequency resources can be indicated.

[0508] In order to indicate the locations of 'Frequency Resource Set 1' and 'Frequency Resource Set 2' across two DL subbands, information on the locations of the starting PRB (RBG) resource and the last PRB (RBG) resource of the two sets is required. Let the locations of the first starting PRB (RBG) resource and the last PRB (RBG) resource be s1 and s2, respectively, and the locations of the second starting PRB (RBG) resource and the last PRB (RBG) resource be s3 and s4, respectively.

[0509] Then, the continuous frequency resources from s1 to s2 can constitute 'frequency resource set 1', and the continuous frequency resources from s3 to s4 can constitute 'frequency resource set 2'.

[0510] To use this instruction method, the terminal can be instructed by the base station of values ​​for s1, s2, s3, and s4.

[0511] The terminal can directly receive values ​​for s1, s2, s3, and s4 from the base station through DCI scheduling the PDSCH.

[0512] Alternatively, to reduce the overhead of DCI, the terminal may receive index values ​​representing the values ​​of s1, s2, s3, and s4 from the base station through DCI scheduling the PDSCH. In this case, this index value r may be calculated based on the aforementioned equations 7 and 8.

[0513] At this time, the group contains M sorted subband indices, where (1≤s i ≤N, s i < s i+1 )am. is the extended binomial coefficient, and has a unique label Creates.

[0514] At this time, N RB DL may mean the number of RBs that constitute the DL BWP.

[0515] P may represent the RBG size when indicating PDSCH transmission frequency resources in RBG units. When indicating PDSCH transmission frequency resources in PRB units, the value of P may be equal to 1.

[0516] When applying this method, instead of being instructed with two RIV values ​​from the base station to determine the locations of 'frequency resource set 1' and 'frequency resource set 2', the terminal may be instructed with four PRB (RBG) index values, s1, s2, s3, and s4. In this case, in the present disclosure, being instructed with two RIV values ​​may be interpreted / applied as being instructed with the values ​​s1, s2, s3, and s4.

[0517] Alternatively, when applying this method, instead of being instructed with two RIV values ​​from the base station to determine the locations of 'frequency resource set 1' and 'frequency resource set 2', the terminal may be instructed with an r value, which is an index representing the values ​​s1, s2, s3, and s4. In this case, in the present disclosure, being instructed with two RIV values ​​may be interpreted / applied as being instructed with an r value.

[0518] B. Instruction method for two RIVs through DCI

[0519] The terminal can receive the RIV value from the base station through the FDRA (Frequency domain resource assignment) field in the DCI that schedules the PDSCH.

[0520] When applying the contents of the present disclosure such as the aforementioned Section A, when a terminal determines a transmission frequency resource of a PDSCH scheduled from a base station, a method of configuring an FDRA field in a DCI in which a PDSCH is scheduled and a method of determining a field size (bit length) are described.

[0521] As in Section A above, the number of RIVs indicated for resource allocation may vary depending on the symbol type (SBFD or non-SBFD) of the symbol resource on which the PDSCH is transmitted. For example, in a non-SBFD symbol, one RIV value may be indicated to indicate the frequency resource on which the PDSCH is transmitted, whereas in an SBFD symbol, two RIV values ​​may be indicated to indicate an independent RIV for each DL subband.

[0522] When a terminal is instructed with two RIV values ​​(e.g., values ​​of RIV 1 and RIV 2) for determining the locations of 'frequency resource set 1' and 'frequency resource set 2' for a PDSCH transmitted in an SBFD symbol, the two RIV values ​​can be specifically instructed as follows.

[0523] Method 1. The terminal is instructed of two RIV values ​​through different fields in the DCI that schedules the PDSCH. For example, if there are two FDRA fields in the DCI, the first FDRA field can be instructed to indicate the RIV 1 value, and the second FDRA field can be instructed to indicate the RIV 2 value.

[0524] Hereinafter, let the field size (bit length) of the FDRA field required when performing frequency resource allocation based on one RIV as before in a non-SBFD symbol be 'BitSize1'. Let the total field size (bit length) composing the two FDRA fields required when performing frequency resource allocation based on two RIVs in an SBFD symbol be 'BitSize2'.

[0525] Then, the terminal can determine that the field size (bit length) of the FDRA field in the DCI in which the PDSCH is scheduled is equal to max(BitSize1, BitSize2). This is because the terminal cannot determine in advance the symbol type of the symbol in which the PDSCH scheduled by the DCI is transmitted, and therefore the terminal cannot specify the number of fields and the field size (bit length) of the FDRA field.

[0526] When a terminal receives a DCI in which a PDSCH is scheduled and determines that the symbol type of the symbol in which the PDSCH is transmitted is a non-SBFD symbol, it can determine that there is one FDRA field in the DCI and that the field size (bit length) of the field is 'BitSize1'.

[0527] Alternatively, if the terminal receives a DCI in which a PDSCH is scheduled and determines that the symbol type of the symbol in which the PDSCH is transmitted is an SBFD symbol, the terminal may determine that there are two FDRA fields in the DCI and that the total field size (bit length) constituting the two FDRA fields is 'BitSize2'. The terminal may determine the RIV 1 value from the first FDRA field and the RIV2 value from the second FDRA field.

[0528] Method 2. The terminal is instructed with two RIV values ​​through one FDRA field in the DCI that schedules the PDSCH in the SBFD symbol.

[0529] Let the field size (bit length) of the FDRA field required when performing frequency resource allocation based on one RIV as before in a non-SBFD symbol be 'BitSize1', and let the field size (bit length) of the FDRA field required when performing frequency resource allocation based on two RIVs in an SBFD symbol be 'BitSize2'.

[0530] Then, the terminal can determine that the field size (bit length) of the FDRA field in the DCI where the PDSCH is scheduled is equal to max(BitSize1, BitSize2). This is because the terminal cannot determine in advance the symbol type of the symbol through which the PDSCH scheduled by the DCI is transmitted, and therefore cannot specify the field size (bit length) of the FDRA field as 'BitSize1' or 'BitSize2'.

[0531] When a terminal receives a DCI in which a PDSCH is scheduled and determines that the symbol type of the symbol in which the PDSCH is transmitted is a non-SBFD symbol, among the bits composing the FDRA field of the DCI, the terminal determines that 'BitSize1' bits from the front (or back) are actually valid bits and uses the bits to determine the allocated frequency resources.

[0532] Or, if the terminal receives a DCI in which a PDSCH is scheduled and determines that the symbol type of the symbol in which the PDSCH is transmitted is an SBFD symbol, the terminal may determine that among the bits configuring the FDRA field of the DCI, 'BitSize2' bits from the front (or back) are actually valid bits and use the bits to determine the allocated frequency resources. Of the 'BitSize2' bits, K bits can be used to indicate RIV 1, and M bits among the remaining bits can be used to indicate RIV 2. In this case, K+M can be less than or equal to 'BitSize2'.

[0533] The terminal can determine the symbol type of the symbol through which the PDSCH is transmitted as follows.

[0534] It can mean the symbol type of symbols determined to be symbols for which PDSCH transmission is performed, as indicated through the TDRA field of DCI that schedules PDSCH.

[0535] Alternatively, it may refer to a symbol type assumed for transmission of a PDSCH, as indicated by DCI scheduling the PDSCH. For this purpose, information about the symbol type assumed by the terminal for transmission of the PDSCH may be indicated through DCI.

[0536] FIG. 28 illustrates an operation method of a terminal according to one embodiment of the present disclosure.

[0537] Referring to FIG. 28, the terminal receives frequency resource allocation information indicating a set of virtual resource blocks (VRBs) contiguously allocated within a bandwidth part (BWP) (S281).

[0538] The above virtual resource blocks may be non-interleaved virtual resource blocks or interleaved virtual resource blocks.

[0539] The above frequency resource allocation information may indicate i) a starting virtual resource block of the virtual resource blocks and ii) a resource indication value (RIV) corresponding to the length, which is the number of consecutively allocated resource blocks. According to an embodiment, the starting resource block group RBG start And it can inform the RIV corresponding to the number (length) of virtually consecutively allocated resource block groups. Based on the RIV, the allocated frequency resources (virtual resource blocks or virtual resource block groups) can be identified, for example, by at least one of Equations 1 to 3.

[0540] The above frequency resource allocation information can be received through downlink control information (DCI).

[0541] The terminal receives a shared channel through physical resource blocks (PRBs) mapped to the virtual resource blocks, but the physical resource blocks are limited to physical resource blocks included in a downlink subband of the bandwidth portion (S282). In other words, the physical resource blocks may include only physical resource blocks included in the downlink subband among the physical resource blocks of the bandwidth portion.

[0542] In some embodiments, the downlink subband may include a first downlink subband and a second downlink subband, wherein the first downlink subband and the second downlink subband may be downlink subbands spaced apart from each other in the frequency domain.

[0543] For example, there may be two downlink subbands spaced apart in the frequency domain, such as DL subband 1 and DL subband 2 illustrated in FIGS. 19, 21 to 23.

[0544] If the above virtual resource blocks are non-interleaved virtual resource blocks, the interleaved virtual resource blocks are N RBB (N RBB is divided into virtual resource block bundles (N is a natural number), and the N RBB N virtual resource block bundles RBB are mapped 1:1 to the physical resource block bundles of the dog. At this time, the N RBB All physical resource block bundles are included in the above downlink subband.

[0545] At this time, the above N RBB Among the physical resource block bundles, a physical resource block bundle located at the boundary of the downlink subband may include a smaller number of physical resource blocks than other physical resource block bundles.

[0546] For example, as shown in FIG. 21, among the 10 physical resource block bundles (PRBBs), PRBB 0 and PRBB 4, which are located at the boundary of DL subband 1, and PRBB 5 and PRBB 9, which are located at the boundary of DL subband 2, contain two physical resource blocks (PRBs). The other PRBBs contain four physical resource blocks.

[0547] The above N RBBN virtual resource block bundles and the above N RBB Each bundle of physical resource blocks is numbered from 0 to N. RBB If indexed with -1, map virtual resource block bundle 0 to physical resource block bundle 0, (N RBB -1) Virtual resource block bundle (N) RBB -1) can be mapped to the physical resource block bundle. Here, the physical resource block bundle 0 and (N RBB -1) The physical resource block bundle is a physical resource block bundle located at the boundary of a downlink subband. For example, PRBB #N located at the boundary of a downlink subband is mapped to VRBB #N having the same index number N.

[0548] In an embodiment, when the downlink subband includes two downlink subbands, the frequency resource allocation information may indicate two RIV values, and may indicate virtual resource blocks mapped to physical resource blocks included in the first downlink subband based on a first RIV value among the two RIV values, and may indicate virtual resource blocks mapped to physical resource blocks included in the second downlink subband based on a second RIV value.

[0549] According to the method of FIG. 28, when indicating the transmission frequency resources of the PDSCH using resource allocation type 1, even if there are two discontinuous DL subbands in the frequency domain in the SBFD symbol (e.g., FIG. 19, FIG. 21, etc.), the frequency resources can be indicated so that the PDSCH is located across the two DL subbands. Through this, the transmission throughput of the PDSCH can be increased compared to an operation in which the PDSCH is transmitted through only one DL subband, and diversity gain can also be obtained.

[0550] Figure 29 illustrates signaling and operation between a base station and a terminal.

[0551] Referring to FIG. 29, the base station provides an RRC message including information informing the terminal of the downlink resource allocation type (S291).

[0552] The downlink resource allocation type can be either Type 0 or Type 1. Type 0 is a method of indicating the RBGs (resource block groups) allocated through a bitmap. Here, an RBG is a set of contiguous virtual resource blocks, and the number of virtual resource blocks included in each RBG (nominal RBG size P) can be defined or determined based on the parameters set for each DCI format by the upper layer parameters and the size of the bandwidth portion.

[0553] Type 1 is a method that provides an RIV value to indicate the number of starting virtual resource blocks (starting virtual resource block sets) and consecutively allocated resource blocks (virtual resource block sets). In the following, it is assumed that the RRC message indicates Type 1.

[0554] Although FIG. 29 illustrates an example in which a base station indicates a downlink resource allocation type via an RRC message, this is not a limitation. That is, a base station can indicate a dynamic switch for a specific DCI format via an RRC message, and then a terminal can use Type 0 or Type 1 depending on the downlink resource allocation type indicated by the frequency domain resource allocation field of the corresponding DCI format.

[0555] Alternatively, the terminal may assume that downlink resource allocation type 1 (type 1 described above) is used when a scheduling grant is received through a specific DCI format (e.g., DCI format 1_0, 4_0, or 4_1) among multiple DCI formats. That is, step S291 may not be performed depending on the embodiment.

[0556] The base station transmits frequency resource allocation information to the terminal (S292). The frequency resource allocation information may indicate a set of virtual resource blocks (VRBs) contiguously allocated within a bandwidth portion (BWP). For example, a set of VRBs (or sets of VRBs) contiguously allocated within a bandwidth portion may be indicated through at least one RIV.

[0557] The terminal receives a shared channel through physical resource blocks (PRBs) mapped to the virtual resource blocks, but the physical resource blocks are limited to physical resource blocks included in a downlink subband of the bandwidth portion (S293). In other words, the physical resource blocks may include only physical resource blocks included in the downlink subband among the physical resource blocks of the bandwidth portion.

[0558] The base station transmits a shared channel, for example, a physical downlink shared channel (PDSCH), to the terminal through physical resource blocks mapped to the virtual resource blocks (S294).

[0559] Figure 30 illustrates a wireless device applicable to the present specification.

[0560] Referring to FIG. 30, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR).

[0561] A first wireless device (100) includes at least one processor (102) and at least one memory (104), and may further include at least one transceiver (106) and / or at least one antenna (108). The at least one processor (102, hereinafter simply referred to as a processor) controls at least one memory (104, hereinafter simply referred to as a memory) and / or at least one transceiver (106, hereinafter simply referred to as a transceiver or a transceiver), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (102) may process information in the memory (104) to generate first information / signal, and then transmit a wireless signal including the first information / signal via the transceiver (106). In addition, the processor (102) may receive a wireless signal including second information / signal through the transceiver (106), and then store information obtained from signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive a wireless signal through one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit.In this specification, wireless device may also mean a communication modem / circuit / chip.

[0562] The processor (102) receives frequency resource allocation information indicating a set of virtual resource blocks (VRBs) consecutively allocated within a bandwidth portion, and receives a shared channel (e.g., PDSCH) through physical resource blocks (PRBs) mapped to the virtual resource blocks, wherein the physical resource blocks are physical resource blocks included in a downlink subband of the bandwidth portion. The specific operation thereof has been described with reference to FIGS. 18 to 29.

[0563] A second wireless device (200) includes at least one processor (202), at least one memory (204), and may further include at least one transceiver (206) and / or at least one antenna (208). The processor (202) controls the memory (204) and / or the transceiver (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document. For example, the processor (202) may process information in the memory (204) to generate third information / signal, and then transmit a wireless signal including the third information / signal via the transceiver (206). In addition, the processor (202) may receive a wireless signal including fourth information / signal via the transceiver (206), and then store information obtained from signal processing of the fourth information / signal in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may perform some or all of the processes controlled by the processor (202), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via one or more antennas (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF unit. In this specification, a wireless device may also mean a communication modem / circuit / chip.

[0564] The processor (202) transmits frequency resource allocation information indicating a set of virtual resource blocks (VRBs) contiguously allocated within a bandwidth part (BWP) to a terminal, and transmits a shared channel to the terminal through physical resource blocks mapped to the virtual resource blocks. At this time, the physical resource blocks are characterized in that they are physical resource blocks included in a downlink subband of the bandwidth part. The specific operation has been described with reference to FIGS. 18 to 29.

[0565] Hereinafter, the hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed herein, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed herein.

[0566] The one or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. The one or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in the one or more processors (102, 202). The one or more processors (102, 202) may also be implemented by at least one computer-readable medium (CRM) containing instructions based on which at least one processor is executed.

[0567] For example, at least one computer readable medium (CRM) including instructions based on being executed by at least one processor receives frequency resource allocation information indicating a set of virtual resource blocks (VRBs) consecutively allocated within a bandwidth portion, and receives a shared channel (e.g., PDSCH) through physical resource blocks (PRBs) mapped to the virtual resource blocks, wherein the physical resource blocks are physical resource blocks included in a downlink subband of the bandwidth portion. The specific operation thereof has been described with reference to FIGS. 18 to 29.

[0568] The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions. The firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be included in one or more processors (102, 202) or stored in one or more memories (104, 204) and executed by one or more processors (102, 202). The descriptions, functions, procedures, suggestions, methods and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0569] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0570] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of this document, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of this document, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed herein, via one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

[0571] Fig. 31 illustrates an example of a signal processing module structure. Here, signal processing may be performed in the processor (102, 202) of Fig. 30.

[0572] Referring to FIG. 31, a transmission device (e.g., a processor, a processor and a memory, or a processor and a transceiver) within a terminal or a base station may include a scrambler (301), a modulator (302), a layer mapper (303), an antenna port mapper (304), a resource block mapper (305), and a signal generator (306).

[0573] A transmitting device can transmit one or more codewords. The coded bits within each codeword are scrambled by a scrambler (301) and transmitted over a physical channel. A codeword may also be referred to as a data string and may be equivalent to a transport block, which is a data block provided by the MAC layer.

[0574] The scrambled bits are modulated into complex-valued modulation symbols by a modulator (302). The modulator (302) can modulate the scrambled bits according to a modulation scheme and arrange them into complex-valued modulation symbols that represent positions on a signal constellation. There is no limitation on the modulation scheme, and m-PSK (m-Phase Shift Keying) or m-QAM (m-Quadrature Amplitude Modulation) can be used to modulate the encoded data. The modulator may be referred to as a modulation mapper.

[0575] The complex modulation symbols may be mapped to one or more transmission layers by a layer mapper (303). The complex modulation symbols on each layer may be mapped by an antenna port mapper (304) for transmission on an antenna port.

[0576] The resource block mapper (305) can map the complex modulation symbol for each antenna port to an appropriate resource element within a virtual resource block (VRB) allocated for transmission. The resource block mapper can map the VRB to a physical resource block (PRB) according to an appropriate mapping scheme. The resource block mapper (305) can assign the complex modulation symbol for each antenna port to an appropriate subcarrier and multiplex it according to the user.

[0577] The signal generator (306) can generate a complex-valued time domain OFDM symbol signal by modulating a complex modulation symbol, for example, an antenna-specific symbol, for each antenna port, with a specific modulation method, for example, an Orthogonal Frequency Division Multiplexing (OFDM) method. The signal generator can perform an Inverse Fast Fourier Transform (IFFT) on the antenna-specific symbol, and a Cyclic Prefix (CP) can be inserted into the time domain symbol on which the IFFT is performed. The OFDM symbol is transmitted to a receiving device through each transmitting antenna through digital-to-analog conversion, frequency uplink conversion, etc. The signal generator can include an IFFT module, a CP inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc.

[0578] Fig. 32 illustrates another example of the signal processing module structure within a transmission device. Here, signal processing may be performed in a processor of a terminal / base station, such as the processor (102, 202) of Fig. 30.

[0579] Referring to FIG. 32, a transmission device (e.g., a processor, a processor and a memory, or a processor and a transceiver) within a terminal or base station may include a scrambler (401), a modulator (402), a layer mapper (403), a precoder (404), a resource block mapper (405), and a signal generator (406).

[0580] The transmitting device can transmit coded bits within a codeword through a physical channel after scrambling the coded bits within the codeword by a scrambler (401).

[0581] The scrambled bits are modulated into complex modulation symbols by a modulator (402). The modulator can modulate the scrambled bits according to a predetermined modulation scheme and arrange them into complex modulation symbols representing positions on a signal constellation. There is no limitation on the modulation scheme, and pi / 2-BPSK (pi / 2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), or m-QAM (m-Quadrature Amplitude Modulation) can be used to modulate the encoded data.

[0582] The above complex modulation symbol can be mapped to one or more transmission layers by the layer mapper (403).

[0583] The complex modulation symbols on each layer can be precoded by the precoder (404) for transmission on the antenna ports. Here, the precoder may perform precoding after performing transform precoding on the complex modulation symbols. Alternatively, the precoder may perform precoding without performing transform precoding. The precoder (404) may process the complex modulation symbols in a MIMO manner according to multiple transmission antennas to output antenna-specific symbols and distribute the antenna-specific symbols to the corresponding resource block mapper (405). The output z of the precoder (404) can be obtained by multiplying the output y of the layer mapper (403) by the precoding matrix W of NХM. Here, N is the number of antenna ports and M is the number of layers.

[0584] The resource block mapper (405) maps the demodulation modulation symbol for each antenna port to the appropriate resource element within the virtual resource block allocated for transmission.

[0585] The resource block mapper (405) can assign complex modulation symbols to appropriate subcarriers and multiplex them according to the user.

[0586] The signal generator (406) can generate a complex-valued time domain OFDM (Orthogonal Frequency Division Multiplexing) symbol signal by modulating a complex modulation symbol with a specific modulation method, for example, OFDM. The signal generator (406) can perform an Inverse Fast Fourier Transform (IFFT) on an antenna-specific symbol, and a Cyclic Prefix (CP) can be inserted into the time domain symbol on which the IFFT has been performed. The OFDM symbol is transmitted to a receiving device through each transmitting antenna after going through digital-to-analog conversion, frequency upconversion, etc. The signal generator (406) can include an IFFT module, a CP inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc.

[0587] The signal processing process of the receiving device may be configured in reverse order of the signal processing process of the transmitter. Specifically, the processor of the receiving device performs decoding and demodulation on a wireless signal received externally through the antenna port(s) of the transceiver. The receiving device may include a plurality of multiple receiving antennas, and each signal received through the receiving antenna is restored to a baseband signal and then multiplexed and MIMO demodulated to be restored to a data sequence originally intended to be transmitted by the transmitting device. The receiving device (1820) may include a signal restorer for restoring the received signal to a baseband signal, a multiplexer for combining and multiplexing the received and processed signals, and a channel demodulator for demodulating the multiplexed signal sequence into a corresponding codeword. The signal restorer, the multiplexer, and the channel demodulator may be configured as an integrated module performing their functions or as individual modules. More specifically, the signal restorer may include an analog-to-digital converter (ADC) that converts an analog signal into a digital signal, a CP remover that removes a CP from the digital signal, an FFT module that applies an FFT (fast Fourier transform) to a signal from which the CP has been removed to output a frequency domain symbol, and a resource element demapper / equalizer that restores the frequency domain symbol to an antenna-specific symbol. The antenna-specific symbol is restored to a transmission layer by a multiplexer, and the transmission layer is restored to a codeword that the transmitter intended to transmit by a channel demodulator.

[0588] FIG. 33 illustrates an example of a wireless communication device according to an implementation example of the present disclosure.

[0589] Referring to FIG. 33, a wireless communication device, for example, a terminal, may include at least one of a processor (2310) such as a digital signal processor (DSP) or a microprocessor, a transceiver (2335), a power management module (2305), an antenna (2340), a battery (2355), a display (2315), a keypad (2320), a GPS (Global Positioning System) chip (2360), a sensor (2365), a memory (2330), a SIM (Subscriber Identification Module) card (2325), a speaker (2345), and a microphone (2350). There may be a plurality of antennas and processors.

[0590] The processor (2310) can implement the functions, procedures, and methods described in this specification. The processor (2310) of FIG. 33 may be the processor (102, 202) of FIG. 30.

[0591] Memory (2330) is connected to the processor (2310) and stores information related to the processor's operation. The memory may be located internally or externally to the processor and may be connected to the processor via various technologies, such as wired or wireless connections. The memory (2330) of FIG. 33 may be the memory (104, 204) of FIG. 30.

[0592] A user may input various types of information, such as a phone number, using various techniques, such as pressing buttons on a keypad (2320) or activating sound using a microphone (2350). The processor (2310) may receive and process the user's information and perform an appropriate function, such as dialing the entered phone number. In some scenarios, data may be retrieved from a SIM card (2325) or memory (2330) to perform the appropriate function. In some scenarios, the processor (2310) may display various types of information and data on a display (2315) for the user's convenience.

[0593] A transceiver (2335) is coupled to a processor (2310) and transmits and / or receives wireless signals, such as radio frequency (RF) signals. The processor may control the transceiver to initiate communication or transmit wireless signals containing various types of information or data, such as voice communication data. The transceiver includes a transmitter and a receiver for transmitting and receiving wireless signals. An antenna (2340) may facilitate the transmission and reception of wireless signals. In some implementations, upon receiving a wireless signal, the transceiver may forward and convert the signal to a baseband frequency for processing by the processor. The processed signal may be processed by various techniques, such as being converted into audible or readable information for output through a speaker (2345). The transceiver of FIG. 33 may be the transceiver (106, 206) of FIG. 29.

[0594] Although not shown in FIG. 33, various components, such as a camera and a Universal Serial Bus (USB) port, may be additionally included in the terminal. For example, the camera may be connected to the processor (2310).

[0595] Fig. 33 is only one implementation example for a terminal, and the implementation examples are not limited thereto. The terminal does not necessarily have to include all the elements of Fig. 33. For example, some components, such as a keypad (2320), a Global Positioning System (GPS) chip (2360), a sensor (2365), and a SIM card (2325), may not be essential elements, and in this case, may not be included in the terminal.

[0596] Figure 34 illustrates another example of a wireless device.

[0597] According to FIG. 34, the wireless device may include at least one processor (102, 202), at least one memory (104, 204), at least one transceiver (106, 206), and one or more antennas (108, 208).

[0598] The difference between the example of the wireless device described in FIG. 30 and the example of the wireless device in FIG. 34 is that in FIG. 30, the processor (102, 202) and the memory (104, 204) are separated, whereas in the example of FIG. 34, the memory (104, 204) is included in the processor (102, 202). For example, the processor and the memory may constitute a single chipset.

[0599] Fig. 35 illustrates a communication system (1) applicable to this specification.

[0600] Referring to FIG. 35, a communication system (1) applied to the present specification includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using a wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Things) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing vehicle-to-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone). XR devices include AR (Augmented Reality) / VR (Virtual Reality) / MR (Mixed Reality) devices, and can be implemented in the form of HMD (Head-Mounted Device), HUD (Head-Up Display) installed in a vehicle, television, smartphone, computer, wearable device, home appliance, digital signage, vehicle, robot, etc. Mobile devices can include smartphone, smart pad, wearable device (e.g., smart watch, smart glass), computer (e.g., laptop, etc.), etc. Home appliances can include TV, refrigerator, washing machine, etc. IoT devices can include sensors, smart meters, etc. For example, base stations and networks can also be implemented as wireless devices, and a specific wireless device (200a) can act as a base station / network node to other wireless devices.

[0601] Wireless devices (100a to 100f) can be connected to a network (300) via a base station (200). Artificial Intelligence (AI) technology can be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) via the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, a 5G (e.g., NR) network, etc. The wireless devices (100a to 100f) can communicate with each other via the base station (200) / network (300), but can also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to Everything) communication). In addition, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0602] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base stations (200), and base stations (200) / base stations (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR) such as uplink / downlink communication (150a), sidelink communication (150b) (or, D2D communication), and communication between base stations (150c) (e.g., relay, IAB (Integrated Access Backhaul). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), and resource allocation processes can be performed based on various proposals of the present specification.

[0603] Meanwhile, NR supports multiple numerologies (or subcarrier spacing (SCS)) to support various 5G services. For example, an SCS of 15 kHz supports a wide area in traditional cellular bands; an SCS of 30 kHz / 60 kHz supports dense urban areas, lower latency, and wider carrier bandwidth; and an SCS of 60 kHz or higher supports a bandwidth greater than 24.25 GHz to overcome phase noise.

[0604] The NR frequency band can be defined by two types of frequency ranges (FR1, FR2). The numerical values ​​of the frequency ranges can be changed, and for example, the frequency ranges of the two types (FR1, FR2) can be as shown in Table 5 below. For convenience of explanation, among the frequency ranges used in the NR system, FR1 can mean the “sub 6 GHz range”, and FR2 can mean the “above 6 GHz range” and can be called millimeter wave (mmW).

[0605] [Table 5]

[0606]

[0607] As described above, the numerical value of the frequency range of the NR system can be changed. For example, FR1 may include a band from 410 MHz to 7125 MHz, as shown in Table 6 below. For example, FR1 may include a frequency band above 6 GHz (or 5850, 5900, 5925 MHz, etc.). For example, the frequency band above 6 GHz (or 5850, 5900, 5925 MHz, etc.) included within FR1 may include an unlicensed band. The unlicensed band may be used for various purposes, such as for communications for vehicles (e.g., autonomous driving).

[0608] [Table 6]

[0609]

[0610] The claims set forth in this specification may be combined in various ways. For example, the technical features of the method claims of this specification may be combined and implemented as a device, and the technical features of the device claims of this specification may be combined and implemented as a method. Furthermore, the technical features of the method claims and the technical features of the device claims of this specification may be combined and implemented as a device, and the technical features of the method claims and the technical features of the device claims of this specification may be combined and implemented as a method.

Claims

1. In the method, The terminal receives frequency resource allocation information indicating a set of virtual resource blocks (VRBs) contiguously allocated within a bandwidth part (BWP), and The terminal receives a shared channel through physical resource blocks mapped to the virtual resource blocks. A method characterized in that the above physical resource blocks are physical resource blocks included in a downlink subband of the bandwidth portion.

2. A method according to claim 1, wherein the virtual resource blocks are non-interleaved virtual resource blocks or interleaved virtual resource blocks.

3. A method according to claim 1, wherein the downlink subband includes a first downlink subband and a second downlink subband, wherein the first downlink subband and the second downlink subband are downlink subbands spaced apart from each other in the frequency domain.

4. In the first paragraph, if the virtual resource blocks are non-interleaved virtual resource blocks, the interleaved virtual resource blocks are N RBB (N RBB is divided into virtual resource block bundles (N is a natural number), and the above N RBB N bundles of virtual resource blocks RBB Map 1:1 to the physical resource block bundles of the dog, but the N RBB A method characterized in that all physical resource block bundles of the dog are included in the downlink subband.

5. In the fourth paragraph, the N RBB A method characterized in that, among the physical resource block bundles, a physical resource block bundle located at the boundary of the downlink subband includes a smaller number of physical resource blocks than other physical resource block bundles.

6. In the fourth paragraph, the N RBB N virtual resource block bundles and the above N RBB Each bundle of physical resource blocks is numbered from 0 to N. RBB If indexed by -1, Map virtual resource block bundle 0 to physical resource block bundle 0, (N RBB -1) Virtual resource block bundle (N RBB -1) A method characterized by mapping to a physical resource block bundle.

7. A method according to claim 1, wherein the frequency resource allocation information is characterized in that it indicates a resource indication value (RIV) corresponding to i) a starting virtual resource block of the virtual resource blocks and ii) a length, which is the number of continuously allocated resource blocks.

8. In the 7th paragraph, when the downlink subband includes two downlink subbands, the frequency resource allocation information indicates two RIV values, and is characterized in that virtual resource blocks mapped to physical resource blocks included in the first downlink subband are indicated based on a first RIV value among the two RIV values, and virtual resource blocks mapped to physical resource blocks included in the second downlink subband are indicated based on a second RIV value.

9. A method according to claim 1, characterized in that the frequency resource allocation information is received through downlink control information (DCI).

10. A method according to claim 1, characterized in that the physical resource blocks include only physical resource blocks included in the downlink subband among the physical resource blocks of the bandwidth portion.

11. The terminal is, At least one transceiver; At least one memory; and At least one processor operably coupled with said at least one memory and said at least one transceiver, wherein said at least one memory comprises instructions that are executed by said at least one processor to perform operations, The above actions are, Receive frequency resource allocation information indicating a set of virtual resource blocks (VRBs) contiguously allocated within a bandwidth part (BWP), and Receive a shared channel through physical resource blocks mapped to the above virtual resource blocks, A terminal characterized in that the above physical resource blocks are physical resource blocks included in a downlink subband of the bandwidth portion.

12. A terminal according to claim 11, wherein the virtual resource blocks are non-interleaved virtual resource blocks or interleaved virtual resource blocks.

13. A terminal according to claim 11, wherein the downlink subband includes a first downlink subband and a second downlink subband, wherein the first downlink subband and the second downlink subband are downlink subbands spaced apart from each other in the frequency domain.

14. In the 11th paragraph, if the virtual resource blocks are non-interleaved virtual resource blocks, the interleaved virtual resource blocks are N RBB (N RBB is divided into virtual resource block bundles (N is a natural number), and the above N RBB N bundles of virtual resource blocks RBB Map 1:1 to the physical resource block bundles of the dog, but the N RBB A terminal characterized in that all of the dog's physical resource block bundles are included in the downlink subband.

15. In the 14th paragraph, the N RBB A terminal characterized in that, among the physical resource block bundles, a physical resource block bundle located at the boundary of the downlink subband includes a smaller number of physical resource blocks than other physical resource block bundles.

16. In the 14th paragraph, the N RBB N virtual resource block bundles and the above N RBB Each bundle of physical resource blocks is numbered from 0 to N. RBB If indexed by -1, Map virtual resource block bundle 0 to physical resource block bundle 0, (N RBB -1) Virtual resource block bundle (N RBB -1) A terminal characterized by mapping to a physical resource block bundle.

17. A terminal according to claim 11, wherein the frequency resource allocation information is characterized in that it indicates a resource indication value (RIV) corresponding to i) a starting virtual resource block of the virtual resource blocks and ii) a length, which is the number of continuously allocated resource blocks.

18. In the 17th paragraph, when the downlink subband includes two downlink subbands, the frequency resource allocation information indicates two RIV values, and is characterized in that virtual resource blocks mapped to physical resource blocks included in the first downlink subband are indicated based on a first RIV value among the two RIV values, and virtual resource blocks mapped to physical resource blocks included in the second downlink subband are indicated based on a second RIV value.

19. A terminal according to claim 11, characterized in that the frequency resource allocation information is received through downlink control information (DCI).

20. In the 11th paragraph, the terminal is characterized in that the physical resource blocks include only physical resource blocks included in the downlink subband among the physical resource blocks of the bandwidth portion.

21. The device, At least one memory; and At least one processor operably coupled to at least one memory, wherein said at least one memory comprises instructions that are executed by said at least one processor to perform operations, The above actions are, Receive frequency resource allocation information indicating a set of virtual resource blocks (VRBs) contiguously allocated within a bandwidth part (BWP), and Receive a shared channel through physical resource blocks mapped to the above virtual resource blocks, A device characterized in that the above physical resource blocks are physical resource blocks included in a downlink subband of the bandwidth portion.

22. At least one computer readable medium (CRM) containing instructions based on being executed by at least one processor, Receive frequency resource allocation information indicating a set of virtual resource blocks (VRBs) contiguously allocated within a bandwidth part (BWP), and Receive a shared channel through physical resource blocks mapped to the above virtual resource blocks, CRM characterized in that the above physical resource blocks are physical resource blocks included in a downlink subband of the bandwidth portion.

23. In the method, The base station transmits frequency resource allocation information to the terminal, which indicates a set of virtual resource blocks (VRBs) contiguously allocated within a bandwidth part (BWP), and The base station transmits a shared channel to the terminal through physical resource blocks mapped to the virtual resource blocks. A method characterized in that the above physical resource blocks are physical resource blocks included in a downlink subband of the bandwidth portion.

24. The base station, At least one transceiver; At least one memory; and At least one processor operably coupled with said at least one memory and said at least one transceiver, wherein said at least one memory comprises instructions that are executed by said at least one processor to perform operations, The above actions are, Transmits frequency resource allocation information to the terminal, which indicates a set of virtual resource blocks (VRBs) contiguously allocated within a bandwidth part (BWP), and Transmitting a shared channel to the terminal through physical resource blocks mapped to the virtual resource blocks, The above physical resource blocks are physical resource blocks included in the downlink subband of the bandwidth portion.

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