Operation method of apparatus in subband full duplex communication system and apparatus using said method

Abstract

Provided are an operation method of an apparatus in a wireless communication system, and an apparatus using said method. The method comprises: receiving first configuration information for configuring a cell-specific downlink subband from a network; receiving second configuration information for configuring a UE-specific downlink subband from the network; and receiving a downlink signal from the network in one of the cell-specific downlink subband and the UE-specific downlink subband, wherein, when the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a PDSCH scheduled by downlink control information (DCI), the downlink signal is received in one of the cell-specific downlink subband and the UE-specific downlink subband on the basis of an instruction from the network.

Description

Method of operating a device in a subband full duplex communication system and a device using the method

[0001] The present disclosure relates to a method of operating a device in a subband full duplex 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] It is necessary to define a method for configuring SBFD frequency resources in an SBFD system. For example, in the prior art, SBFD frequency resources, such as uplink and downlink subbands, are configured cell-specifically. However, this poses a problem in that it is difficult to change the size of guard subbands, which are configured to account for cross-link interference (CLI), depending on the environment.

[0006] Additionally, it is necessary to clearly specify under what conditions and through what frequency band the terminal should receive a downlink signal in the SBFD system.

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

[0008] A method of operating a device in a subband full duplex communication system and a device using the method are provided. According to the method, a terminal receives first configuration information for setting a cell-specific downlink subband from a network, receives second configuration information for setting a terminal-specific downlink subband from the network, and receives a downlink signal from the network in one of the cell-specific downlink subband and the terminal-specific downlink subband, wherein, when the downlink signal is a CSI-RS or a signal through a PDSCH scheduled by DCI, the downlink signal is received in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction from the network.

[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 first configuration information for setting a cell-specific downlink subband to a terminal, transmits second configuration information for setting a terminal-specific downlink subband to the terminal, and transmits a downlink signal to the terminal in one of the cell-specific downlink subband and the terminal-specific downlink subband, wherein, when the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a PDSCH scheduled by downlink control information (DCI), the downlink signal is transmitted in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction of the base station.

[0011] According to the method according to the present disclosure, in an SBFD system, more frequency resources can be used as DL subbands in a terminal-specific manner, so that frequency resources can be used more efficiently.

[0012] Additionally, the signaling overhead for indicating the SBFD symbol is reduced, and the SBFD symbol can be prevented from being set in the UL symbol.

[0013] Figure 1 illustrates a wireless communication system to which the present disclosure can be applied.

[0014] Figure 2 is a block diagram showing a radio protocol architecture for a user plane.

[0015] Figure 3 is a block diagram showing the wireless protocol structure for the control plane.

[0016] Figure 4 illustrates the system architecture of a New Generation Radio Access Network (NG-RAN) to which NR is applied.

[0017] Figure 5 illustrates the functional division between NG-RAN and 5GC.

[0018] Figure 6 illustrates a frame structure that can be applied in NR.

[0019] Figure 7 illustrates the slot structure of an NR frame.

[0020] Figure 8 illustrates a core set.

[0021] Figure 9 illustrates an example of a frame structure for a new wireless access technology.

[0022] Figure 10 illustrates the structure of a self-contained slot.

[0023] Figure 11 illustrates physical channels and general signal transmission.

[0024] Figure 12 is an example of PUSCH repetition type A.

[0025] Figure 13 is an example of PUSCH repetition type B.

[0026] Figure 14 shows examples of how to apply full duplex within a carrier.

[0027] 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.

[0028] Figure 16 shows examples of a first time resource, a second time resource, a first frequency resource, and a second frequency resource.

[0029] Figure 17 illustrates another example of a first time resource, a second time resource, a first frequency resource, and a second frequency resource.

[0030] Figure 18 shows an example of SBFD symbol resource configuration.

[0031] Figure 19 shows another example of SBFD symbol resource configuration.

[0032] Figure 20 is an example in which the same SBFD subband time position is applied to all TDD-UL-DL pattern sections.

[0033] Figure 21 is an example in which different SBFD symbol positions are set for each TDD-UL-DL pattern section within a period of SBFD subband time positions.

[0034] Figure 22 shows examples of subband configurations.

[0035] Figure 23 illustrates the configuration of DL and UL subbands in an SBFD symbol.

[0036] Figure 24 shows examples of frequency resource configurations of SBFD subbands.

[0037] Figure 25 illustrates frequency resources constituting a guard subband.

[0038] Fig. 26 illustrates an operation method of a terminal according to one embodiment of the present disclosure.

[0039] Fig. 27 illustrates an operation method of a base station according to one embodiment of the present disclosure.

[0040] FIG. 28 illustrates a signaling and operation method between a base station and a terminal according to one embodiment of the present disclosure.

[0041] Figure 29 illustrates a wireless device applicable to the present specification.

[0042] Figure 30 illustrates an example of a signal processing module structure.

[0043] Figure 31 illustrates another example of the structure of a signal processing module within a transmission device.

[0044] FIG. 32 illustrates an example of a wireless communication device according to an implementation example of the present disclosure.

[0045] Figure 33 illustrates another example of a wireless device.

[0046] Fig. 34 illustrates a communication system (1) applicable to this specification.

[0047] As used herein, “A or B” can mean “only A,” “only B,” or “both A and B.” In other words, as used herein, “A or B” can be interpreted as “A and / or B.” For example, as used herein, “A, B or C” 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 / 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] The 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 gNodeB (gNB), 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 into account enhanced mobile broadband communications, massive MTC, and URLLC (Ultra-Reliable and Low Latency Communication) is being discussed, and for convenience, these technologies are referred to as new RAT or NR in this disclosure.

[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 a frame structure that can be applied in NR.

[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] FIG. 9 illustrates 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 time 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 time and resources overlap with other signals, it is desirable to transmit SSB preferentially. To achieve this, the network can broadcast SSB transmission time 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 can perform a random access procedure (Random Access Procedure) to complete connection to the base station (S13-S16). Specifically, the terminal can 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 can 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 can 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, leaving it 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 existing NR TDD carriers, the base station performs only downlink or uplink operations in a specific time resource. In this case, the base station always operates in 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, where 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 the HD symbol, the SBFD symbol, and / or the 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 this disclosure, a method is proposed for a terminal to set and determine the time resource where an SBFD symbol is located during intra-carrier full duplex operation.

[0250] In addition, the present disclosure proposes a method for determining frequency resource locations of DL subbands and / or UL subbands during full duplex operation within a carrier.

[0251] In this disclosure, it is assumed that a cell performs / supports SBFD operation, which performs DL and UL simultaneously using different frequency resources (e.g., subbands) in the same time resource. However, the contents of this disclosure can also be applied to a case where a cell performs / supports SSFD operation.

[0252] The present disclosure may include the following terminal operations.

[0253] When a terminal performs DL reception in an SBFD symbol, the terminal can perform DL reception using frequency resources within the DL subband. The terminal can perform DL reception using frequency resources within the DL subband within the DL BWP. The terminal does not perform DL reception on frequency resources outside the DL subband. The terminal does not perform DL reception using frequency resources outside the DL subband within the DL BWP.

[0254] When a terminal performs UL transmission in an SFBD symbol, the terminal can perform UL transmission using frequency resources within the UL subband. The terminal can perform UL transmission using frequency resources within the UL subband within the UL BWP. The terminal does not perform UL transmission on frequency resources outside the UL subband. The terminal does not perform UL transmission using frequency resources outside the UL subband within the UL BWP.

[0255] In general, a terminal can perform DL reception within a DL subband and UL transmission within a UL subband in a time resource where the terminal determines that the cell is operating in SBFD.

[0256] However, in the time resource where the cell is determined to operate in SBFD, it may be considered that the gNB (base station, hereinafter the same) performs only DL transmission or UL reception, or, if necessary, performs DL transmission or UL reception (capable of receiving DL or UL scheduling) over the entire band.

[0257] Additionally / independently, the present disclosure proposes a method in which a terminal receives location information of an SBFD symbol from a network and, based on this, the terminal independently determines the location of the SBFD symbol.

[0258] The terminal receives slot configuration information, which is DL and UL symbol information for multiple slot resources, from the network through tdd-UL-DL-ConfigurationCommon, which is a cell-specific TDD UL / DL configuration.

[0259] In the present disclosure, a symbol set to DL through tdd-UL-DL-ConfigurationCommon (or tdd-UL-DL-ConfigCommon) is called a cell-specific DL symbol. tdd-UL-DL-ConfigCommon is an information element (IE) that defines cell-specific uplink / downlink TDD configuration. In addition, a symbol that is not set to DL or UL through tdd-UL-DL-ConfigurationCommon (or tdd-UL-DL-ConfigCommon) is called a cell-specific F (flexible) symbol.

[0260] The terminal receives pattern1 or pattern1 and pattern2 through tdd-UL-DL-ConfigCommon as exemplified in Table 5. Pattern1 contains slot configuration information for the P msec time interval. Pattern2 contains slot configuration information for the P2 msec time interval.

[0261] If the terminal is set to only pattern1, the slot setting cycle is equal to P. If the terminal is set to pattern1 and pattern2, pattern1 and pattern2 are applied repeatedly, and the slot setting cycle is equal to P+P2 msec.

[0262] Table 5 illustrates tdd-UL-DL-ConfigCommon.

[0263] [Table 5]

[0264]

[0265] The terminal can receive consecutive symbols among the symbols of pattern1 and / or pattern2 from the network as SBFD symbol resources.

[0266] If the terminal is set to only pattern1, consecutive symbols within the time interval of P msec indicated by pattern1 can be set as SBFD symbol resources.

[0267] Additionally, within a time interval of P msec, consecutive symbols within symbols judged as cell-specific DL and / or cell-specific F can be set as SBFD symbol resources.

[0268] When a terminal is configured with both pattern1 and pattern2, it can receive information about consecutive symbol resources configured as SBFD symbol resources within the P msec time interval indicated by pattern1. Additionally / independently, it can independently receive information about consecutive symbol resources configured as SBFD symbol resources within the P2 msec time interval indicated by pattern2.

[0269] More specifically, information about consecutive symbol resources set as SBFD symbol resources within symbols determined as cell-specific DL and / or cell-specific F within a P msec time interval indicated by pattern1 can be set. Additionally / independently, information about consecutive symbol resources set as SBFD symbol resources within symbols determined as cell-specific DL and / or cell-specific F within a P2 msec time interval indicated by pattern2 can be independently set.

[0270] The configured SBFD symbol resource can be applied with a period of P+P2 msec or a period of (P+P2)*N msec. If pattern2 is not configured, P2 can be determined as 0. In this case, when pattern1 and pattern2 are applied periodically with a period of P+P2 msec, SBFD symbol resources may exist only in some P+P2 msec time intervals.

[0271] Meanwhile, for example, in time resources where specific signals / channels, such as SS / PBCH, are transmitted and received, it may be necessary to configure SBFD symbol resources so that SBFD operations are not performed. To this end, it may be necessary to configure SBFD symbol resources differently for each time interval. Taking this into account, multiple SBFD symbol resources can be configured so that SBFD symbols can exist in different resources for different P+P2 msec time intervals. In this case, each SBFD symbol resource can be applied with an independent period and offset.

[0272] Below, a method is described in which a terminal receives information from a network for determining SBFD symbol resources and determines SBFD symbol resources based on the information.

[0273] Method 1.

[0274] An SBFD symbol resource consists of a continuous symbol resource (e.g., SBFD symbol 1) existing within the interval of pattern1 and a continuous symbol resource (e.g., SBFD symbol 2) existing within the interval of pattern2. That is, one SBFD symbol resource consists of SBFD symbol interval 1 and SBFD symbol interval 2. If a terminal is configured with only pattern1, one SBFD symbol resource may consist of only SBFD symbol interval 1.

[0275] The SBFD symbol resource exists with a period of (P+P2)*N msec (N: natural number). At this time, the SBFD symbol resource can exist in a specific section among the N P+P2 msec sections existing within the (P+P2)*N msec section. If the terminal is configured with only pattern1, P2 can be determined as 0.

[0276] To this end, the terminal may receive information (hereinafter referred to as "SBFD symbol configuration information") for determining "SBFD symbol resources" from the network. This SBFD symbol configuration information may include all or part of the following information.

[0277] 1) Periodicity (can also be called cycle)

[0278] The values ​​of N can be set for periodicity information. In this case, the terminal can determine that the periodicity / cycle is equal to (P+P2)*N msec. At this time, N can be an integer greater than or equal to 1. Alternatively, when the periodicity is equal to (P+P2)*N, a value corresponding to (P+P2)*N can be directly set.

[0279] 2) Offset

[0280] An offset value can be set to determine the time position where the SBFD symbol resource exists within the cycle. The offset can be set to the value of N'. In this case, the terminal can determine that the offset value is equal to (P+P2)*N' msec. At this time, N' can have a value of 0, 1, …, N-1. Alternatively, when the offset is equal to (P+P2)*N' msec, a value corresponding to (P+P2)*N' can be directly set.

[0281] 3) SBFD symbol section 1

[0282] Information about SBFD symbol resources existing within the pattern1 section can be set. For this purpose, for example, the following information can be set.

[0283] i) SBFD symbol 1 offset: Sets an offset value between the first symbol to which pattern1 is applied and the starting symbol position where SBFD symbol interval 1 begins. At this time, this offset value may have a unit of slot or symbol.

[0284] ii) SBFD Symbol 1 Duration: Receives duration information for SBFD Symbol Duration 1 resources. At this time, this duration value may have a unit of slot or symbol.

[0285] Or, for example, you can set the following information:

[0286] i) Non-SBFD to SBFD transition point 1: Information on the point of transition from a non-SBFD symbol to an SBFD symbol within the pattern1 section, i.e., information on the position of the symbol where SBFD symbol section 1 begins, is set. More specifically, information on the position of the symbol where SBFD symbol section 1 begins can be set based on the first symbol to which pattern1 is applied.

[0287] ii) SBFD to non-SBFD transition point 1: Information about the point of transition from an SBFD symbol to a non-SBFD symbol within the pattern1 section is set, i.e., the position information of the symbol at which SBFD symbol section 1 ends or the position information of the next symbol of the last symbol constituting SBFD symbol section 1 is set. More specifically, based on the first symbol to which pattern1 is applied, the position information of the symbol at which SBFD symbol section 1 ends or the position information of the symbol next to the last symbol constituting SBFD symbol section 1 is set.

[0288] 4) SBFD symbol section 2

[0289] Information about SBFD symbol resources within the pattern2 section can be set. For example, the following information can be set.

[0290] i) SBFD symbol 2 offset: Sets an offset value between the first symbol to which pattern2 is applied and the starting symbol position where SBFD symbol interval 2 begins. At this time, this offset value may have a unit of slot or symbol.

[0291] ii) SBFD Symbol 2 Interval: Receives interval information for SBFD Symbol Interval 2 resources. At this time, this interval value may have a unit of slot or symbol.

[0292] Or, for example, you can set the following information:

[0293] i) Non-SBFD to SBFD transition point 2: Information on the point of transition from a non-SBFD symbol to an SBFD symbol within the pattern2 period, i.e., information on the position of the symbol where SBFD symbol period 2 begins, is set. More specifically, information on the position of the symbol where SBFD symbol period 2 begins can be set based on the first symbol to which pattern2 is applied.

[0294] ii) SBFD to non-SBFD transition point 2: Information about the point of transition from an SBFD symbol to a non-SBFD symbol within the pattern2 section is set, i.e., the position information of the symbol at which SBFD symbol section 2 ends or the position information of the symbol following the last symbol constituting SBFD symbol section 2 is set. More specifically, based on the first symbol to which pattern2 is applied, the position information of the symbol at which SBFD symbol section 2 ends or the position information of the symbol following the last symbol constituting SBFD symbol section 2 is set.

[0295] Through the SBFD symbol setting information as above, the terminal can determine the SBFD symbol resource as follows.

[0296] 1) The terminal determines that the SBFD symbol resource exists with a periodicity of (P+P2)*N msec. At this time, the terminal determines that the SBFD symbol resource exists within a time interval of (P+P2)*N'msec to (P+P2)*(N'+1) msec based on the starting point of each periodicity within each periodicity interval. Alternatively, the terminal determines that pattern1 and pattern2, which exist at the N'th time within each periodicity interval, exist within the SBFD symbol resource.

[0297] 2) The terminal determines that the time resource equivalent to 1 consecutive SBFD symbol intervals from the SBFD symbol 1 offset position, based on the starting point of the time interval in which the SBFD symbol exists as determined in 1) above, constitutes SBFD symbol 1. That is, the terminal determines that the time resource equivalent to 1 consecutive SBFD symbol intervals from the SBFD symbol 1 offset position, based on the position of (P+P2)*N' msec within each period, constitutes SBFD symbol interval 1.

[0298] Or, based on the starting position of the pattern1 section where the SBFD symbol exists as determined in 1) above, it is determined that the time resource for the consecutive SBFD symbol 1 sections from the SBFD symbol 1 offset position constitutes SBFD symbol section 1.

[0299] Alternatively, if the terminal is instructed to provide information on a non-SBFD to SBFD transition point and / or an SBFD to non-SBFD transition point to determine an SBFD symbol position, the terminal determines that the time resource from the symbol corresponding to the non-SBFD to SBFD transition point 1 to the symbol before the SBFD to non-SBFD transition point 1 constitutes SBFD symbol interval 1. Additionally, if the SBFD to non-SBFD transition point 1 is not set, the terminal may determine the last symbol of the pattern1 interval in which the SBFD symbol exists as the last symbol constituting SBFD symbol interval 1.

[0300] 3) Additionally, the terminal determines that the time resource for 2 consecutive SBFD symbol intervals from the SBFD symbol 2 offset position constitutes SBFD symbol interval 2, based on the time position P msec after the start point of the time interval in which the SBFD symbol exists as determined in 1) above. That is, the terminal determines that the time resource for 2 consecutive SBFD symbol intervals from the SBFD symbol 2 offset position constitutes SBFD symbol interval 2, based on the position of (P+P2)*N' + P msec within each period.

[0301] Alternatively, the terminal determines that the time resource for 2 consecutive SBFD symbol sections from the SBFD symbol 2 offset position constitutes SBFD symbol section 2 based on the starting position of the pattern2 section in which the SBFD symbol determined as in 1) above exists.

[0302] Alternatively, if the terminal is instructed to provide information on a transition point from Non-SBFD to SBFD and / or a transition point from SBFD to non-SBFD to determine the SBFD symbol position, the terminal determines that the time resource from the symbol corresponding to the transition point 2 from Non-SBFD to SBFD to the symbol preceding the transition point 2 from SBFD to non-SBFD constitutes SBFD symbol interval 2. Additionally, if the transition point 2 from SBFD to non-SBFD is not set, the terminal may determine the last symbol of the pattern2 interval in which the SBFD symbol exists as the last symbol constituting SBFD symbol interval 2.

[0303] The terminal determines that SBFD symbol interval 1 and SBFD symbol interval 2 constitute SBFD symbol resources.

[0304] Figure 18 shows an example of SBFD symbol resource configuration.

[0305] Referring to Fig. 18, an example of SBFD symbol resource configuration is shown when N=2 (i.e., period=(P+P2)*2 msec) and N'=0 (i.e., offset=(P+P2)*0=0 msec).

[0306] In Fig. 18, SBFD symbol interval 1 and SBFD symbol interval 2 exist within the N'th pattern1 and pattern2 intervals within each period, and SBFD symbol interval 1 and SBFD symbol interval 2 constitute SBFD symbol resources.

[0307] Additionally, one SBFD symbol resource can be composed of multiple SBFD symbol intervals 1 and SBFD symbol intervals 2. That is, multiple SBFD symbol intervals 1 and SBFD symbol intervals 2 can be set through one SBFD symbol setting information.

[0308] To this end, a common periodicity and offset may be applied to multiple SBFD symbol intervals 1 and multiple SBFD symbol intervals 2 included in the same SBFD symbol resource.

[0309] In this case, one SBFD symbol configuration information includes one periodicity and offset information, and may include multiple SBFD symbol intervals 1 and SBFD symbol intervals 2. The terminal determines that the same periodicity and offset are applied to multiple SBFD symbol intervals 1 and SBFD symbol intervals 2.

[0310] Alternatively, multiple SBFD symbol intervals 1 and multiple SBFD symbol intervals 2 included in the same SBFD symbol resource may have a common periodicity applied to each other, but may have independent offsets.

[0311] In this case, SBFD symbol interval 1 and SBFD symbol interval 2 are always set as a pair, and SBFD symbol interval 1 and SBFD symbol interval 2 that are in a pair relationship can apply the same offset.

[0312] In this case, one SBFD symbol configuration information includes one periodicity information, and multiple pairs of {offset, SBFD symbol interval 1, SBFD symbol interval 2} information can be configured. The terminal determines that the same periodicity is applied to multiple SBFD symbol intervals 1 and SBFD symbol intervals 2. In addition, the terminal determines that multiple SBFD symbol intervals 1 and SBFD symbol intervals 2 are paired together and that the indicated offset value is applied.

[0313] Alternatively, it may have independent offsets for each SBFD symbol interval, regardless of SBFD symbol interval 1 or SBFD symbol interval 2.

[0314] In this case, one SBFD symbol setting information includes one periodicity information, and multiple pairs of {offset, SBFD symbol interval 1} and multiple pairs of {offset, SBFD symbol interval 2} information can be set. The terminal determines that the same periodicity is applied to multiple SBFD symbol intervals 1 and SBFD symbol interval 2. In addition, the terminal determines that the offset value indicated by being paired together in each SBFD symbol interval is applied to multiple SBFD symbol intervals 1 and SBFD symbol interval 2.

[0315] Additionally, multiple offset information can be set for offset information.

[0316] For this purpose, for example, multiple N' values ​​may be included in the offset information. Alternatively, the offset information may be composed of bitmap information consisting of N bits. If the nth bit is 1, it may mean that n is included in the offset.

[0317] In this case, the terminal can determine that the SBFD symbol interval (SBFD symbol interval 1 and / or SBFD symbol interval 2) is commonly applied to multiple offsets. That is, when the offset information includes M (<=N) offset values, the terminal can determine that the SBFD symbol interval (SBFD symbol interval 1 and / or SBFD symbol interval 2) is applied based on each offset position within the cycle.

[0318] For example, when the periodicity (N) is 4 and the offset (N') = {0, 2}, the set SBFD symbol interval 1 and SBFD symbol interval 2 can be located based on (P+P2)*0 msec and (P+P2)*2 msec within each period.

[0319] At this time, multiple SBFD symbol resources may exist. In this case, the SBFD symbol resources may have independent configuration information. That is, the terminal may receive one or more SBFD symbol resources from the network. To this end, the terminal may independently receive information about each SBFD symbol resource from the network.

[0320] Method 2.

[0321] SBFD symbol resources consist of continuous symbol resources within the pattern 1 or pattern 2 interval.

[0322] The SBFD symbol resource exists with a period of (P+P2)*N msec (N: natural number). At this time, the SBFD symbol resource can exist in a specific section among the N P+P2 msec sections existing within the (P+P2)*N msec section. If the terminal is configured with only pattern1, P2 can be determined as 0.

[0323] To this end, the terminal may receive information (hereinafter referred to as "SBFD symbol configuration information") for determining "SBFD symbol resources" from the network. This SBFD symbol configuration information may include all or part of the following information.

[0324] 1) Periodicity

[0325] The value of N can be set for periodicity. In this case, the terminal can determine that the periodicity is equal to (P+P2)*N msec. In this case, N can be an integer greater than or equal to 1.

[0326] Or, when the periodicity is equal to (P+P2)*N, the value corresponding to (P+P2)*N can be directly set.

[0327] 2) Offset

[0328] An offset value can be set to determine the time position where the SBFD symbol resource exists within the cycle. The value of N' can be set for the offset. In this case, the terminal can determine that the offset value is equal to (P+P2)*N' msec. At this time, N' can have a value of 0, 1, …, N-1. Alternatively, when the offset is equal to (P+P2)*N' msec, a value corresponding to (P+P2)*N' can be directly set.

[0329] 3) TDD pattern

[0330] You can set information about the pattern that has SBFD symbol resources among pattern1 and pattern2.

[0331] 4) SBFD symbol section

[0332] Information about an SBFD symbol interval can be set within a pattern interval in which SBFD symbol resources indicated by the above TDD pattern exist. For this purpose, for example, the following information can be set.

[0333] i) SBFD Symbol Offset: Sets an offset value between the starting symbol position where the SBFD symbol resource starts from the first symbol in which the pattern indicated by the TDD pattern exists. At this time, this offset value may have a unit of slot or symbol.

[0334] ii) SBFD symbol interval: Receive interval information for SBFD symbol resources. At this time, this interval value may have a unit of slot or symbol.

[0335] Or, for example, you can set the following information:

[0336] i) Transition point from Non-SBFD to SBFD: Information on the point of transition from a non-SBFD symbol to an SBFD symbol within a pattern section where SBFD symbol resources exist, i.e., information on the position of the symbol where the SBFD symbol section begins, is set. More specifically, information on the position of the symbol where the SBFD symbol section begins can be set based on the first symbol of the pattern section where SBFD symbol resources exist.

[0337] ii) Transition point from SBFD to non-SBFD: Information on the point of transition from an SBFD symbol to a non-SBFD symbol within a pattern section where SBFD symbol resources exist is set, i.e., position information of the symbol at which the SBFD symbol section ends or position information of the symbol following the last symbol constituting the SBFD symbol section is set. More specifically, based on the first symbol of the pattern section where SBFD symbol resources exist, position information of the symbol at which the SBFD symbol section ends or position information of the symbol following the last symbol constituting the SBFD symbol section is set.

[0338] With the above information, the terminal can determine the SBFD symbol resource as follows.

[0339] 1) The terminal determines that the periodicity of the SBFD symbol resource exists as a period of (P+P2)*N msec.

[0340] At this time, if pattern1 is indicated by the TDD pattern, the terminal determines that the SBFD symbol resource exists within a time interval of (P+P2)*N' msec to (P+P2)*N'+P msec based on the starting point of each periodicity within each periodicity interval. Alternatively, the terminal determines that the SBFD symbol resource exists within the pattern1 resource that exists N'th within each periodicity interval.

[0341] Or, if pattern2 is indicated by the TDD pattern, the terminal determines that the SBFD symbol resource exists within a time interval of (P+P2)*N'+P msec to (P+P2)*(N'+1) msec based on the starting point of each periodicity within each periodicity interval. Or, the terminal determines that the SBFD symbol resource exists within the pattern2 resource that exists N'th within each periodicity interval.

[0342] 2) The terminal determines that the time resources for the consecutive SBFD symbol intervals from the SBFD symbol offset position constitute the SBFD symbol resource based on the starting point of the time interval in which the SBFD symbol determined as in 1) above exists. For example, if pattern1 is indicated by the TDD pattern, the terminal determines that the time resources for the consecutive SBFD symbol intervals from the SBFD symbol offset position constitute the SBFD symbol resource based on the position of (P+P2)*N' msec within each period. Alternatively, if pattern2 is indicated by the TDD pattern, the terminal determines that the time resources for the consecutive SBFD symbol intervals from the SBFD symbol offset position constitute the SBFD symbol resource based on the position of (P+P2)*N'+P msec within each period.

[0343] Or, based on the starting position of the pattern section where the SBFD symbol exists as determined as in 1) above, it is determined that the time resource for the consecutive SBFD symbol sections from the SBFD symbol offset position constitutes the SBFD symbol resource.

[0344] Or, if the terminal is instructed with information on a transition point from Non-SBFD to SBFD and / or a transition point from SBFD to non-SBFD in order to determine the SBFD symbol position, the terminal determines that the time resource from the symbol corresponding to the transition point from Non-SBFD to SBFD to the symbol before the transition point from SBFD to non-SBFD constitutes an SBFD symbol section, based on the start position of the pattern section in which the SBFD symbol exists as determined in 1) above. Additionally, if the transition point from SBFD to non-SBFD is not set, the terminal may determine the last symbol of the time section in which the SBFD symbol exists as the last symbol constituting the SBFD symbol section.

[0345] Figure 19 shows another example of SBFD symbol resource configuration.

[0346] Referring to Fig. 19, an example of SBFD symbol resource configuration is shown when N=2 (i.e., period = (P+P2)*2 msec), N'=0 (i.e., offset = (P+P2)*0 = 0 msec), and TDD pattern = pattern 2. In Fig. 19, SBFD symbol resources exist within the N'th pattern2 section within each period.

[0347] Additionally, one SBFD symbol resource can be composed of multiple SBFD symbol intervals. That is, multiple SBFD symbol intervals (pairs of multiple SBFD symbol offsets and SBFD symbol intervals) can be configured through one SBFD symbol configuration information.

[0348] In this case, common periodicity, offset, and / or TDD pattern information may be applied to multiple SBFD symbol intervals included in the same SBFD symbol resource.

[0349] In this case, one SBFD symbol configuration information includes one periodicity, offset, and / or TDD pattern information, and information for multiple SBFD symbol intervals (pairs of multiple SBFD symbol offsets and SBFD symbol intervals) can be configured. The terminal determines that the same periodicity, offset, and / or TDD pattern information is applied to multiple SBFD symbol intervals.

[0350] Alternatively, multiple SBFD symbol sections included in the same SBFD symbol resource may have common periodicity and offset, but may have independent TDD pattern information.

[0351] In this case, one SBFD symbol configuration information includes one periodicity and offset information, and multiple pairs of {TDD pattern information, SBFD symbol interval information} can be configured. The terminal determines that the same periodicity and offset information is applied to multiple SBFD symbol intervals. On the other hand, the terminal determines that the TDD pattern information indicated by pairing is applied to each SBFD symbol interval for multiple SBFD symbol intervals.

[0352] Alternatively, multiple SBFD symbol sections included in the same SBFD symbol resource may have a common periodicity applied to each other, but may have independent offset and TDD pattern information.

[0353] In this case, one SBFD symbol configuration information includes one periodicity information, and multiple pairs of {offset, TDD pattern information, SBFD symbol interval information} can be configured. The terminal determines that the same periodicity is applied to multiple SBFD symbol intervals. On the other hand, the terminal determines that the offset and TDD pattern information paired and indicated for each SBFD symbol interval are applied to multiple SBFD symbol intervals.

[0354] Additionally, multiple offset information can be set for offset information.

[0355] For this purpose, for example, multiple N' values ​​may be included in the offset information. Alternatively, the offset information may be composed of bitmap information consisting of N bits. If the nth bit is 1, it may mean that n is included in the offset.

[0356] In this case, the terminal can determine that the SBFD symbol interval is commonly applied to multiple offsets. That is, if the offset information includes M (<=N) offset values, the terminal can determine that the SBFD symbol interval is applied based on each offset position within the cycle.

[0357] For example, when periodicity (N) is 4, offset (N') = {0, 2}, and TDD pattern = pattern2, the set SBFD symbol interval can be located based on (P+P2)*0 + P msec and (P+P2)*2 + P msec within each period.

[0358] At this time, multiple SBFD symbol resources may exist. In this case, the SBFD symbol resources may have independent configuration information. That is, the terminal may receive one or more SBFD symbol resources from the network. To this end, the terminal may independently receive information about each SBFD symbol resource from the network.

[0359] Additionally / independently, if the periodicity is not set through the SBFD symbol configuration information, the terminal may determine that the periodicity of the SBFD symbol configuration information is equal to P+P2 msec. That is, it may determine that N=1. Alternatively, the terminal may determine that the periodicity of the SBFD symbol configuration information is equal to the period at which the SS / PBCH is transmitted in the corresponding cell.

[0360] This method can be applied even if Method 1 and Method 2 for the above SBFD symbol setting information are applied or if another method is applied.

[0361] Figure 20 is an example in which the same SBFD subband time position is applied to all TDD-UL-DL pattern sections.

[0362] Referring to FIG. 20, as in Option 1, the same SBFD subband time position is applied in all TDD-UL-DL pattern intervals (indicated by the period of TDD-UL-DL-ConfigCommon, which may mean the period set by TDD-UL-DL-ConfigCommon).

[0363] Meanwhile, in Option 2, SBFD symbols can be located only in some TDD-UL-DL patterns within the period of SBFD subband time positions.

[0364] In this case, the cell has the advantage of being able to flexibly adjust the SBFD subband time position as needed. For example, it is easy to avoid some symbols transmitting SSB from being set as SBFD symbols, or to adjust the resource amounts of SBFD and non-SBFD symbols.

[0365] Figure 21 is an example in which different SBFD symbol positions are set for each TDD-UL-DL pattern section within a period of SBFD subband time positions.

[0366] Referring to FIG. 21, in order to utilize the advantages of Option 2, it may be considered that different SBFD symbol positions are set for each TDD-UL-DL pattern section (indicated by the period of TDD-UL-DL-ConfigCommon, which may mean the period set by TDD-UL-DL-ConfigCommon) within the period of the SBFD subband time position.

[0367] Hereinafter, a method for indicating the position of an SBFD symbol within a single TDD-UL-DL pattern set by TDD-UL-DL-ConfigCommon is described. In the present disclosure, the period in which the configuration information for the SBFD symbol is applied is p SBFD It is said.

[0368] Method 1. How to indicate the starting SBFD symbol and the SBFD symbol section.

[0369] To indicate the location of the SBFD symbol, a starting SBFD symbol (e.g., s0) and / or an SBFD symbol interval (e.g., s d ) information may be indicated.

[0370] In this case, the terminal starts from symbol #s0 to symbol #s0+s d -1 consecutive s d It can be concluded that dog symbols are used as SBFD symbols. These SBFD symbols are p SBFD It exists in cycles.

[0371] At this time, these SBFD symbol resources are reference symbol locations (e.g., s r ) can be expressed in terms of relative symbol positions.

[0372] At this time, s r can be as follows (s r can mean the following).

[0373] Alt 1. Start symbol of each cycle where the SBFD symbol exists

[0374] Alt 2. Start symbol of TDD-UL-DL pattern where SBFD symbol exists

[0375] If the TDD-UL-DL pattern period is less than the period of the SBFD symbol setting, the period of the SBFD symbol setting is p SBFD Multiple TDD-UL-DL patterns can exist within a section. SBFD symbols can exist only within a specific TDD-UL-DL pattern section. Or p SBFD The SBFD symbol may exist differently for each TDD-UL-DL pattern section located within the section. Considering this, the reference symbol s for indicating the location of the SBFD symbol existing within a specific TDD-UL-DL pattern section r may be the same as the start symbol of the corresponding TDD-UL-DL pattern section.

[0376] The following locations within a specific TDD-UL-DL pattern where the SBFD symbol is located: f It can be called. The position of the last symbol among the symbols set to DL or Flexible by TDD-UL-DL-ConfigCommon within the TDD-UL-DL pattern. These s f The value is also a reference symbol position (e.g., s r ) can mean the relative symbol position.

[0377] At this time, the starting SBFD symbol is symbol #s f must be located before s. That is, s0 is greater than 0 and s f It can be indicated within values ​​less than or equal to.

[0378] If the configuration information for the SBFD symbol is indicated to the terminal, but the start SBFD symbol information is not indicated, the terminal may determine that the value of s0 is equal to 0.

[0379] At this time, the SBFD symbol must be instructed not to be located in a symbol indicated as UL by TDD-UL-DL-ConfigCommon within the TDD-UL-DL pattern. Considering this, the SBFD symbol section (e.g., s d ) is s f -s0 can be specified among values ​​less than or equal to 1.

[0380] If the configuration information for the SBFD symbol is indicated to the terminal, but the SBFD symbol interval information is not indicated, the terminal s d The value of s f -It can be judged to be the same as s0+1.

[0381] Method 2. How to indicate the start SBFD symbol and the last SBFD symbol.

[0382] To indicate the location of the SBFD symbol, the starting SBFD symbol (e.g., s0) and / or the last SBFD symbol information (e.g., s l ) can be directed.

[0383] At this time, s r is s in the above method 1 r can be the same as s f is s in the above method 1 f It can be like this.

[0384] Method 2-1.

[0385] The terminal starts from symbol #s0 to symbol #s l Continuous s up to l -s0+1 symbols can be judged to be used as SBFD symbols. These SBFD symbols are p SBFD It exists in cycles.

[0386] At this time, these start SBFD symbol and last SBFD symbol resources are located at the reference symbol position (e.g., s r ) can indicate the relative symbol position.

[0387] At this time, the starting SBFD symbol is symbol #s fIt must be located before s. That is, s0 is greater than 0 and s f It can be indicated within values ​​equal to or less than . If the configuration information for the SBFD symbol is indicated to the terminal, but the start SBFD symbol information is not indicated, the terminal can determine that the value of s0 is equal to 0.

[0388] At this time, the SBFD symbol must be instructed not to be located in the symbol indicated as UL by TDD-UL-DL-ConfigCommon within the TDD-UL-DL pattern. Considering this, the last SBFD symbol (e.g., s l ) is greater than s0 and s f It can be indicated among values ​​that are equal to or less than.

[0389] If the configuration information for the SBFD symbol is indicated to the terminal, but the last SBFD symbol interval information is not indicated, the terminal s l The value of s f It can be judged to be the same as .

[0390] Method 2-2.

[0391] The terminal starts from symbol #s0 to symbol #s f -s l It can be determined that the consecutive symbols up to are used as SBFD symbols. These SBFD symbols are p SBFD It exists in cycles.

[0392] At this time, these start SBFD symbol and last SBFD symbol resources are located at the reference symbol position (e.g., s r ) can indicate the relative symbol position.

[0393] At this time, the starting SBFD symbol is symbol #s f It must be located before s. That is, s0 is greater than 0 and s f It can be indicated within values ​​less than or equal to.

[0394] If the configuration information for the SBFD symbol is indicated to the terminal, but the start SBFD symbol information is not indicated, the terminal may determine that the value of s0 is equal to 0.

[0395] At this time, information for determining the last SBFD symbol (e.g., s l ) Information is symbol #s f It can mean a relative symbol offset value, i.e. s l If a value is indicated, the actual location of the last SBFD symbol is symbol #s f -s l It can be like this.

[0396] Taking this into account, information about the last SBFD symbol position (e.g., s l ) is greater than or equal to 0 and s f -s0 can be specified among values ​​less than or equal to 0.

[0397] If the configuration information for the SBFD symbol is indicated to the terminal, but the last SBFD symbol interval information is not indicated, the terminal s l The value of can be judged to be equal to 0.

[0398] Method 3. How to indicate the transition point from non-SBFD to SBFD and from SBFD to non-SBFD.

[0399] To indicate the location of the SBFD symbol, information about the transition point from Non-SBFD to SBFD (e.g., s0) and / or the transition point from SBFD to non-SBFD (e.g., s1) may be indicated.

[0400] The terminal can determine that the cell, while operating in non-SBFD, is operating in SBFD starting from the symbol indicated by the transition point from Non-SBFD to SBFD. In addition, the terminal can determine that the cell, while operating in SBFD, is operating in non-SBFD starting from the symbol indicated by the transition point from SBFD to non-SBFD. In other words, the terminal can determine that the symbol before the symbol indicated by the transition point from Non-SBFD to SBFD to the symbol indicated by the transition point from SBFD to non-SBFD is an SBFD symbol in which the cell is operating in SBFD.

[0401] At this time, s r is s in the above method 1 r can be the same as s f is s in the above method 1 f It can be like this.

[0402] Method 3-1.

[0403] The terminal is a continuous s from symbol #s0 to symbol #s1-1. l -s1 It can be determined that the symbols are used as SBFD symbols. These SBFD symbols are p SBFD It exists in cycles.

[0404] At this time, the transition point from Non-SBFD to SBFD and from SBFD to non-SBFD is the reference symbol position (e.g., s r ) can indicate the relative symbol position.

[0405] At this time, the transition point from Non-SBFD to SBFD is symbol #s f It must be located before s. That is, s0 is greater than 0 and s f It can be indicated within values ​​less than or equal to.

[0406] If the configuration information for the SBFD symbol is indicated to the terminal, but the transition point information from Non-SBFD to SBFD is not indicated, the terminal may determine that the value of s0 is equal to 0.

[0407] At this time, it must be indicated that the SBFD symbol is not located in the symbol indicated as UL by TDD-UL-DL-ConfigCommon within the TDD-UL-DL pattern. Considering this, the transition point from SBFD to non-SBFD (e.g., s1) is greater than s0 and s f It can be indicated among values ​​less than or equal to +1.

[0408] If the configuration information for the SBFD symbol is indicated to the terminal, but the transition point information from SBFD to non-SBFD is not indicated, the terminal sets the value of s1 to s f It can be judged to be equal to +1.

[0409] Method 3-2.

[0410] The terminal starts from symbol #s0 to symbol #s f - It can be determined that the consecutive symbols up to s1 are used as SBFD symbols. These SBFD symbols are p SBFD It exists in cycles.

[0411] At this time, these start SBFD symbol and last SBFD symbol resources are located at the reference symbol position (e.g., s r ) can indicate the relative symbol position.

[0412] At this time, the transition point from Non-SBFD to SBFD is symbol #s f It must be located before s. That is, s0 is greater than 0 and s f It can be indicated within values ​​less than or equal to.

[0413] If the configuration information for the SBFD symbol is indicated to the terminal but the transition point information from Non-SBFD to SBFD is not indicated, the terminal may determine that the value of s0 is equal to 0.

[0414] At this time, the transition point information from SBFD to non-SBFD (e.g., s1) is symbol #s f+1 can mean a relative symbol offset value. That is, if the value s1 is indicated, the position of the actual transition point from SBFD to non-SBFD is symbol #s f -s l It can be equal to +1.

[0415] Taking this into account, information about the location of the transition point from SBFD to non-SBFD (e.g., s1) is greater than or equal to 0 and s f -s0 can be specified among values ​​less than or equal to 0.

[0416] If the configuration information for the SBFD symbol is indicated to the terminal, but the transition point information from SBFD to non-SBFD is not indicated, the terminal may determine that the value of s1 is equal to 0.

[0417] Method 4. Indicate one or two transition points.

[0418] The contents of the above-described method 3 are applied, but one or two switching point information may be indicated to indicate the position of the SBFD symbol.

[0419] If the terminal receives information on a single switching point from the network, it can determine that the switching point information refers to information on a switching point from Non-SBFD to SBFD (e.g., s0). In this case, the terminal can determine that the information on a switching point from SBFD to non-SBFD (e.g., s1) refers to s f It can be judged to be equal to +1.

[0420] When a terminal receives two pieces of switching point information from the network, it may determine that the first switching point information refers to information about a switching point from non-SBFD to SBFD (e.g., s0), and that the second switching point information refers to information about a switching point from SBFD to non-SBFD (e.g., s1). In this case, the smaller value of the two pieces of switching point information may refer to the first switching point information, and the larger value may refer to the second switching point information.

[0421] If the configuration information for the SBFD symbol is indicated to the terminal, but the information for the transition point is not indicated, the terminal determines symbol #0 as the transition point from SBFD to non-SBFD, and symbol #s f +1 can be considered as a transition point from SBFD to non-SBFD. That is, all symbols set to DL or Flexible within the TDD-UL-DL pattern where the SBFD symbol is located can be considered SBFD symbols.

[0422] The terminal determines the SBFD symbol resource determined using the above method as a symbol resource for the cell to perform SBFD operation. In addition, the cell determines the resource that is not designated / determined as an SBFD symbol resource as a symbol resource for the cell to perform non-SBFD (e.g., legacy TDD) operation.

[0423] Hereinafter, a method for determining the frequency resource location of a DL subband, an UL subband, and / or a guard subband in a cell where a terminal performs an SBFD operation is described.

[0424] Figure 22 shows examples of subband configurations.

[0425] Referring to FIG. 22, the DL subband and UL subband in the SBFD symbol can be configured as follows.

[0426] Referring to (a) or (b) of FIG. 22, when one subband is composed of continuous frequency resources, one UL subband and one DL subband may be composed within the system bandwidth. The UL subband may be composed of one continuous frequency resource, and the DL subband may also be composed of one continuous frequency resource. In this case, the UL subband may be located below (see (a) of FIG. 22) or above (see (b) of FIG. 22) the system bandwidth, and the DL subband may be located on the opposite side of the UL subband within the system bandwidth.

[0427] Referring to (c) of FIG. 22, when one subband is composed of continuous frequency resources, one UL subband and two DL subbands may exist within the system band.

[0428] This can be expressed as the UL subband being composed of one continuous frequency resource, and the DL subband being composed of two sets of continuous frequency resources. In this case, the UL subband may be located at the center or middle of the system bandwidth, and the DL subband may be located at both edges (bottom and top) of the system bandwidth.

[0429] <DL / UL / 가드 서브밴드 설정을 위한 부반송파 간격(Subcarrier spacing for DL / UL / guard subband configuration)>

[0430] Since a cell performs UL reception on the UL subband and DL transmission on the DL subband in the time resources operating in SBFD, information about UL subband and DL subband resources can be applied equally to all SBFD terminals within the same cell. Additionally, the UL subband and DL subband may have the following characteristics.

[0431] 1) Semi-static setting of subband frequency positions for SBFD operation, frequency positions of UL / DL subbands are based on the CRB grid.

[0432] 2) The maximum number of UL subbands for SBFD operation in SBFD symbols (excluding legacy UL symbols) within a TDD carrier can be, for example, 1.

[0433] 3) In a semi-static setting, the same subband frequency resources can be used across different SBFD symbols.

[0434] With respect to the frequency resources on which the cell operates, information about the DL frequency resources of the DL carrier of the cell and the UL frequency information constituting the UL carrier are set through the RRC parameters FrequencyInfoDL IE and FrequencyInfoUL IE, respectively.

[0435] Within the FrequencyInfoDL IE and FrequencyInfoUL IE, information about the frequency resources that constitute the corresponding carriers for each subcarrier spacing (SCS) is set through the scs-SpecificCarrier IE. The scs-SpecificCarrier IE contains the following information:

[0436] 1) SubcarrierSpacing: This is the subcarrier spacing of the corresponding carrier. This is used to convert offsetToCarrier to an actual frequency.

[0437] 2) offsetToCarrier: Offset in frequency domain between point A (the lowest subcarrier of common RB 0) and the lowest usable subcarrier of this carrier (expressed in number of PRBs and using subcarrierSpacing defined for this carrier).

[0438] 3) carrierBandwidth: The width of this carrier (number of PRBs, using subcarrierSpacing defined for this carrier).

[0439] The DL and UL frequency resources that constitute a particular cell may vary depending on the SCS applied.

[0440] Meanwhile, the location of point A (absoluteFrequencyPointA) set through FrequencyInfoDL IE and FrequencyInfoUL IE is applied equally regardless of SCS within the same carrier.

[0441] Table 6 is an example of a FrequencyInfoDL IE, which provides basic parameters for the downlink carrier and transmission thereon.

[0442] [Table 6]

[0443]

[0444] Table 7 is an example of a FrequencyInfoUL IE, which provides basic parameters for the uplink carrier and transmission thereon.

[0445] [Table 7]

[0446]

[0447] Table 8 provides an example of an SCS-SpecificCarrier IE, which provides parameters that determine the actual carrier location and width, or carrier bandwidth. This is defined specifically with respect to the numerology (subcarrier spacing (SCS)) and point A (frequency offset).

[0448] [Table 8]

[0449]

[0450] As the frequency resources constituting the cell are determined according to the SCS, the terminal can determine the lowest frequency position (hereinafter referred to as the lower boundary) of the DL / UL carrier, the highest frequency position (hereinafter referred to as the upper boundary), and the number of RBs constituting the carrier (hereinafter referred to as the system BW) according to the BWP in which the terminal operates (more specifically, according to the SCS of the BWP in which the terminal operates).

[0451] Considering the characteristics of the frequency resources that constitute the above-mentioned cell, when a terminal receives frequency resources that constitute a UL subband, a DL subband, and / or a guard subband from a network, it is necessary to know based on which SCS this information is set.

[0452] In consideration of this, the present disclosure proposes that frequency resources constituting UL subbands, DL subbands, and / or guard subbands are set and determined based on SCS as follows.

[0453] SCS judgment method for subband setting / judgment.

[0454] Method 1. The terminal receives subband information based on a specific reference SCS.

[0455] In order to determine the frequency resources constituting the UL subband, DL subband, and / or guard subband, the terminal may receive configuration information (hereinafter referred to as subband configuration information) regarding the frequency resources of the UL subband, DL subband, and / or guard subband from the network. At this time, such configuration information may be set based on a specific reference SCS. And / or, when the terminal determines the frequency resources indicated by such configuration information, the terminal may interpret / determine the information based on the corresponding reference SCS.

[0456] Considering this, the terminal can determine the reference SCS as follows.

[0457] Alt 1. When receiving subband configuration information, the terminal can also receive information about the reference SCS.

[0458] When a terminal independently configures subband configuration information for a UL subband and subband configuration information for a DL subband, the reference SCS information may be independently configured for the UL subband and the DL subband. Alternatively, common reference SCS information may be applied to the UL subband and the DL subband.

[0459] Alt 2. The terminal can determine the SCS applied to a specific BWP as the reference SCS. For example, the SCS set in the initial BWP or default BWP of the terminal can be determined as the reference SCS. Alternatively, the terminal can receive a BWP ID from the network to determine the reference SCS and determine the SCS used for the BWP corresponding to the BWP ID as the reference SCS. If the terminal independently configures subband configuration information for the UL subband and subband configuration information for the DL subband, the reference SCS information can be determined independently for the UL and DL subbands. For example, the SCS applied to the UL BWP can be applied as the reference SCS for the UL subband, and the SCS applied to the DL BWP can be applied as the reference SCS for the DL subband.

[0460] Alt 3. If the reference SCS is smaller than the SCS applied by the terminal, the terminal can configure subband information so that only some of the frequency resources constituting the PRB are included in the subband, depending on the subband configuration. Considering this, the terminal can determine the largest SCS as the reference SCS.

[0461] At this time, the largest SCS can specifically mean the following:

[0462] 1) It refers to the largest SCS supported by NR. Additionally, it may refer to the largest SCS among the SCSs supported by the terminal in the frequency range in which the cell operates (e.g., FR1, FR2).

[0463] 2) Alternatively, it may mean the largest SCS supported by the cell. Specifically, when the largest value among the subcarrierSpacing values ​​within each SCS-SpecificCarrier set to the scs-SpecificCarrierList of FrequencyInfoDL is referred to as the largest SCS of DL, and the largest value among the subcarrierSpacing values ​​within each SCS-SpecificCarrier set to the scs-SpecificCarrierList of FrequencyInfoUL is referred to as the largest SCS of UL, it may mean the larger value between the largest SCS of DL and the largest SCS of UL.

[0464] Alternatively, since the SCS supported by a cell may be different for the DL carrier and the UL carrier, the largest SCS can be determined independently for the DL subband and the UL subband. For the DL subband, this may refer to the largest SCS of the DL, and for the UL subband, this may refer to the largest SCS of the UL.

[0465] 3) It refers to the largest SCS that the terminal operates in the cell. Specifically, it can refer to the SCS with the largest value among the SCSs applied to each BWP for the BWPs set by the terminal in the cell. When the SCS with the largest value among the SCSs applied to the DL BWPs of the terminal is referred to as the largest SCS of the DL BWP, and the SCS with the largest value among the SCSs applied to the UL BWPs of the terminal is referred to as the largest SCS of the UL BWP, it can refer to the larger value between the largest SCS of the DL BWP and the largest SCS of the UL BWP.

[0466] Alternatively, considering that the SCS applied to the DL BWP and UL BWP may be different, the largest SCS can be determined independently for the DL and UL subbands. For the DL subband, this may refer to the largest SCS of the DL BWP, and for the UL subband, this may refer to the largest SCS of the UL BWP.

[0467] Alt 4. For a specific carrier, frequency resources constituting the carrier are set for each SCS, and in this case, the larger the SCS, the narrower the frequency resources the carrier is set to include. Considering this, if the reference SCS is larger than the SCS applied by the terminal, the frequency resources constituting the carrier corresponding to the reference SCS may not include some of the frequency resources constituting the carrier corresponding to the SCS applied by the terminal. Considering this, the terminal can determine the smallest SCS as the reference SCS.

[0468] At this time, the smallest SCS can specifically mean the following:

[0469] 1) It refers to the smallest SCS supported by NR. Additionally, it may refer to the smallest SCS among the SCSs supported by the terminal in the frequency range in which the cell operates (e.g., FR1, FR2).

[0470] 2) It refers to the smallest SCS supported by the cell. Specifically, when the smallest value among the subcarrierSpacing values ​​within each SCS-SpecificCarrier set to the scs-SpecificCarrierList of FrequencyInfoDL is referred to as the smallest SCS of DL, and the smallest value among the subcarrierSpacing values ​​within each SCS-SpecificCarrier set to the scs-SpecificCarrierList of FrequencyInfoUL is referred to as the smallest SCS of UL, it can mean the smaller value between the smallest SCS of DL and the smallest SCS of UL.

[0471] Alternatively, since the SCS supported by a cell may be different for the DL carrier and the UL carrier, the smallest SCS can be determined independently for the DL subband and the UL subband. For the DL subband, this may mean the smallest SCS of the DL, and for the UL subband, this may mean the smallest SCS of the UL.

[0472] 3) It refers to the smallest SCS that the terminal operates in the cell. Specifically, it can refer to the SCS with the largest value among the SCSs applied to each BWP for the BWPs set by the terminal in the cell. When the SCS with the largest value among the SCSs applied to the DL BWPs of the terminal is referred to as the smallest SCS of the DL BWP, and the SCS with the largest value among the SCSs applied to the UL BWPs of the terminal is referred to as the smallest SCS of the UL BWP, it can refer to the smaller one between the smallest SCS of the DL BWP and the smallest SCS of the UL BWP.

[0473] Alternatively, considering that the SCS applied to the DL BWP and UL BWP may be different, the smallest SCS can be determined independently for the DL and UL subbands. For the DL subband, this may mean the smallest SCS of the DL BWP, and for the UL subband, this may mean the smallest SCS of the UL BWP.

[0474] When applying this method, if the subband configuration information is set only for the UL subband or the DL subband, or if the subband configuration information is set independently for the UL subband and the DL subband, i) the subband configuration information for the UL subband can be set from the gNB to the terminal via system information and / or RRC signaling, etc. For example, such information can be set by being included in FrequencyInfoUL IE or UplinkConfigCommon. ii) And / or the subband configuration information for the DL subband can be set from the gNB to the terminal via system information and / or RRC signaling, etc. For example, such information can be set by being included in FrequencyInfoDL IE or DownlinkConfigCommon.

[0475] When the subband configuration information is configured to be combined for the UL subband and the DL subband, or is commonly applied to the UL subband and the DL subband, the subband configuration information may be configured from the gNB to the UE via system information and / or RRC signaling. For example, such information may be configured by being included in the FrequencyInfoUL IE or UplinkConfigCommon IE. Alternatively, the subband configuration information may be configured by being included in the ServingCellConfigCommon IE.

[0476] Additionally, if the terminal receives information about the reference SCS from the network as in Alt 1, the terminal may apply the information, otherwise, the terminal may determine the reference SCS using the methods of Alt 2, 3, and 4. For example, if the terminal receives reference SCS information used to determine subband information from the network, the terminal determines the value as the reference SCS, otherwise, the terminal determines the smallest SCS as the reference SCS, as in Alt 4.

[0477] In this case, for example, the UE receives subband configuration information from the gNB based on a specific reference SCS. The UE determines the subband location based on this subband configuration information in all of its operating BWPs. In this case, the SCS applied to the UE's operating BWP and the SCS for the subband configuration information may differ.

[0478] Method 2. A method in which the terminal determines subband information based on the SCS applied to the BWP.

[0479] To determine the frequency resources that constitute the UL subband, DL subband, and / or guard subband, the terminal receives SCS-specific subband information from the network. Based on this, when operating in a specific BWP, the terminal determines and applies the subband information corresponding to the SCS applied to the BWP as the subband information for the BWP.

[0480] More specifically, the terminal determines and applies subband information based on the subband information corresponding to the SCS applied to a specific DL BWP. The terminal determines and applies subband information based on the subband information corresponding to the SCS applied to a specific UL BWP.

[0481] To apply this method, subband configuration information can be set independently for each SCS.

[0482] When the subband configuration information is set only for the UL subband or the DL subband, or when the subband configuration information is set independently for the UL subband and the DL subband, 1) the SCS-specific subband configuration information for the UL subband may be set by being included in, for example, the FrequencyInfoUL IE or the UplinkConfigCommon. Or, for example, the subband configuration information for the UL subband applied to the corresponding SCS may be included through the SCS-SpecificCarrier for each SCS set by the FrequencyInfoUL IE. 2) And / or the SCS-specific subband configuration information for the DL subband may be set by being included in the FrequencyInfoDL IE or the DownlinkConfigCommon. Or, for example, the subband configuration information for the DL subband applied to the corresponding SCS may be included through the SCS-SpecificCarrier for each SCS set by the FrequencyInfoDL IE.

[0483] When the subband configuration information is configured to be combined for the UL subband and the DL subband, or when it is commonly applied to the UL subband and the DL subband, 1) the subband configuration information per SCS can be configured from the gNB to the UE through system information and / or RRC signaling, etc. For example, such information can be configured by being included in the FrequencyInfoUL IE or UplinkConfigCommon. Or, for example, the subband configuration information applied to the corresponding SCS can be included through the SCS-SpecificCarrier for each SCS configured with the FrequencyInfoUL IE. 2) Or, the subband configuration information per SCS can be configured by being included in the ServingCellConfigCommon IE.

[0484] In this case, for example, the UE receives subband configuration information based on each SCS for a specific number of SCSs from the gNB. When the UE operates in a specific BWP, it determines the subband position in the BWP by applying the subband configuration information corresponding to / related to the SCS applied to the BWP. In this case, the SCS applied to the UE's operating BWP and the SCS for the subband configuration information are always the same.

[0485] Alternatively, subband configuration information can be included in the configuration information for each BWP. In this case, when a terminal operates in a specific BWP, the subband configuration information configured for that BWP can be applied. Therefore, in this case, the SCS applied to the terminal's operating BWP and the SCS for the subband configuration information are always the same.

[0486] Cell-specific subband configuration

[0487] Figure 23 illustrates the configuration of DL and UL subbands in an SBFD symbol.

[0488] Referring to Figure 23, there can be three configurations of DL and UL subbands in an SBFD symbol.

[0489] Figure 23 (a) can be referred to as SBFD subband pattern 1, Figure 23 (b) can be referred to as SBFD subband pattern 2, and Figure 23 (c) can be referred to as SBFD subband pattern 3.

[0490] When the UL subband is located on one side of the carrier, as in SBFD subband patterns 1 and 2 of (a) and (b) of FIG. 23, there is one DL subband, which is located on the opposite side. Or, when the UL subband is located in the middle of the carrier, as in SBFD subband pattern 3 of (c) of FIG. 23, there are two DL subbands, which are located on both sides.

[0491] The configuration of frequency resources constituting the SBFD subband can be configured cell-specifically from the base station to the terminal. The terminal receives the cell-specific frequency resource configuration of the SBFD subband from the base station, and can determine the frequency resources constituting the DL subband(s), UL subband(s), and / or guard subband(s) from this configuration.

[0492] The following may apply to the setting of the frequency position of the SBFD subband.

[0493] For RRC connected mode terminals, cell-specific configuration of the time and frequency positions of SBFD subbands is supported within the TDD carrier.

[0494] The maximum number of UL subbands for SBFD operation in an SBFD symbol within a TDD carrier can be 1. The UL subbands can be located on one side of the carrier or in the middle of the carrier.

[0495] For semi-static indication of SBFD subband frequency positions, the following options can be selected:

[0496] Option 1: The frequency locations of the UL and DL subbands are explicitly set. RBs not within the UL or DL ​​subbands can be implicitly determined to be guard bands.

[0497] Option 2: The frequency locations of the UL subbands and the number of RBs in the guard band (if any) are explicitly set. RBs not in the UL subband or guard band can be implicitly determined to be DL subbands.

[0498] The subband frequency domain resources are identical across different SBFD symbols within a TDD carrier. The frequency locations of cell-specific UL and DL subbands are indicated relative to the CRB grid.

[0499] RB level granularity is supported for semi-static indication of SBFD subband frequency locations.

[0500] In other words, the frequency resource information of the cell-specific SBFD subband can be set / judged as follows.

[0501] Option 1: The terminal receives frequency resource information constituting the UL and DL subbands from the base station, and implicitly determines the frequency resources constituting the guard subband. The frequency locations of the UL and DL subband(s) are explicitly set, and the guard band(s) (if any) can be implicitly determined / derived from RBs not within the UL or DL ​​subband(s).

[0502] Option 2: The terminal receives frequency resource information for the UL subbands and guard subbands from the base station and implicitly determines the frequency resources for the DL subbands. The frequency locations of the UL subbands and the number of RBs (if any) in the guard band are explicitly set. The DL subband(s) are implicitly determined / derived as RBs that do not belong to the UL subbands or guard bands.

[0503] For configuration information for frequency resource configuration of cell-specific SBFD subbands, the cell-specific frequency location of the SBFD subband can be configured separately for each SCS configuration in the SCS-SpecificCarrierList. For each SCS configuration, the reference start PRB can be a PRB determined by the SCS configuration and the offsetToCarrier corresponding to this subcarrier spacing.

[0504] The UL subband frequency resources within the active UL BWP are called UL usable PRBs, and the DL subband frequency resources within the active DL BWP are called DL usable PRBs. To determine the UL / DL usable PRBs, the following options may be considered. The UL usable PRBs may be determined as the intersection between the cell-specific UL subband and the active UL BWP in the SBFD symbols. The DL usable PRBs may be determined as the intersection between the cell-specific DL subband and the active DL BWP in the SBFD symbols.

[0505] <UE-specific subband configuration>

[0506] For RRC connected mode terminals, cell-specific configuration of the time and frequency positions of SBFD subbands within a TDD carrier may be supported. Whether and how to additionally support terminal-specific configuration of the time and / or frequency positions of SBFD subbands may be an issue. Below, terminal-specific configuration of the frequency positions of SBFD subbands is described.

[0507] In addition to cell-specific configuration of frequency locations of SBFD subbands, the reason for supporting terminal-specific configuration may be to support different guard bands due to different terminal capabilities and / or CLI relaxation between terminals.

[0508] In a macro cell deployment scenario, inter-terminal CLI from an aggressor terminal with higher transmit power may impact DL performance degradation when DL frequency resources are allocated to adjacent UL subbands.

[0509] When a severe CLI level is reported, the gNB may instruct additional UE-specific settings for frequency positions to reduce the available DL PRBs. If the UE determines the size of the available DL PRBs based on these additional UE-specific settings, the UE may apply the size of the available DL PRBs based on the DL signal / channel type within the BWP.

[0510] In order to reduce the impact of gNB to gNB CLI between adjacent subbands received from other cells, it is necessary to reduce the size of the emission of DL signals transmitted by the gNB in ​​the DL subband (first frequency resource) to the UL subband (second frequency resource) below a certain level.

[0511] For convenience, let's call the ratio of the power of the transmission signal radiated to the adjacent subband compared to the transmission signal power ACLR (Adjacent Channel Leakage power ratio). That is, when the gNB transmits a DL signal, it must have ACLR (e.g., ACLR) to the UL subband. gNB ) needs to be transmitted so that it is below a certain value.

[0512] In addition, when receiving UL signals, the gNB needs to reduce the level of signals received outside the UL subband (second frequency resource) to a certain level or less in order to reduce the influence of signals received in frequency resources outside the UL subband (second frequency resource) on UL reception in the UL subband. In other words, the magnitude of signals received in adjacent subbands needs to be reduced to a certain level or less. Let us conveniently refer to the ratio of the power of the received signal to the power of the signal received in the adjacent subband as ACS (Adjacent Channel Selection).

[0513] That is, when the gNB receives an UL signal, it performs ACS (e.g., ACS) in a frequency resource outside the UL subband (or DL ​​subband). gNB) needs to be received so that it is below a certain value.

[0514] In order to reduce the influence of terminal-to-terminal CLI (UE to UE CLI) between adjacent subbands received from other cells, similarly to the above, it is necessary to reduce the size of radiation of UL signals transmitted by terminals in UL subbands (second frequency resources) to DL subbands (first frequency resources) below a certain level.

[0515] That is, when the terminal transmits the UL signal, ACLR (e.g., ACLR) to the DL subband UE ) needs to be transmitted so that it is below a certain value. In addition, when the terminal receives a DL signal, it is necessary to lower the level of the signal received outside the DL subband to below a certain level in order to reduce the influence of the signal received in the frequency resource outside the DL subband (the first frequency resource) on the DL reception in the DL subband. That is, when the terminal receives a DL signal, it is necessary to lower the level of the signal received outside the DL subband to below a certain level in order to reduce the influence of the signal received in the frequency resource outside the DL subband (or the UL subband) on the DL reception in the DL subband. UE ) needs to be received so that it is below a certain value.

[0516] To reduce the impact of gNB to gNB CLI and / or terminal to terminal CLI between adjacent subbands received from other cells, or to reduce the impact of gNB to gNB CLI and / or terminal to terminal CLI between adjacent subbands on other cells, guard frequency resources can be placed at the same location between cells. That is, cells can place guard frequency resources at mutually agreed-upon locations.

[0517] Meanwhile, there are differences in the capabilities of gNBs, so each gNB has a specific ACLR. gNB and ACS gNBThe amount of guard subbands required to satisfy ACLR may vary. For example, there may be differences in the subband filters used between gNBs, which may affect the required ACLR. gNB and ACS gNB The amount of guard subbands required to satisfy the requirement may vary. Considering this case, the location and / or size of the guard frequency resources applied between cells may vary. In this case, the size and / or location of the guard frequency resources may be applied cell-specifically, and this information may be set cell-specifically for the terminal.

[0518] Or, there is a difference in capability between terminals, so a specific ACLR is required depending on the terminal. UE and ACS UE The amount of guard subbands required to satisfy the requirement may vary. Considering this case, the location and / or size of the guard frequency resources applied between terminals may differ. In this case, the size and / or location of the guard frequency resources may be applied terminal-specifically, and this information may be set terminal-specifically for each terminal.

[0519] For the above reasons / purposes, frequency resources constituting DL subbands, UL subbands, and / or guard subbands within the same cell can be set / determined terminal-specifically.

[0520] To this end, when there are cell-specifically set / determined DL subbands, UL subbands, and / or guard subbands, it may be considered to reset / determine such subband information terminal-specifically.

[0521] From a terminal perspective, a guard subband helps reduce the CLI impact of UL transmissions transmitted on a UL subband on the terminal's reception of DL signals on a DL subband to a certain value.

[0522] Therefore, for terminals with significant CLI impact and for which it is difficult to sufficiently attenuate the CLI impact with cell-specifically configured / determined guard subbands, increasing the guard subband size in a terminal-specific manner may be considered. In this case, rather than increasing the guard subband by using a portion of the cell-specific UL subband region as a guard subband, by using a portion of the DL subband region as a guard subband, the interference impact of UL signals transmitted by other terminals in the UL subband on the terminal receiving DL signals in the DL subband can be reduced.

[0523] Conversely, for terminals with minimal CLI impact and thus no problem using fewer guard subbands than those configured / determined cell-specifically, a terminal-specific reduction in the guard subband size can be considered. In this case, by using a portion of the cell-specific guard subband area as a DL subband, more resources can be used for DL ​​reception without increasing the CLI impact on other terminals.

[0524] Below, methods for setting frequency resources of terminal-specific SBFD subbands are described.

[0525] A. Setting Information

[0526] Proposal 1. The terminal receives frequency resource information of a terminal-specific DL subband from the base station.

[0527] The terminal receives frequency resource information for a terminal-specific DL subband from the base station. The terminal uses the frequency resource information for the terminal-specific DL subband to determine the frequency resources that constitute the terminal-specific DL subband.

[0528] Option 1. To achieve this, the terminal receives information about the PRB resources that constitute the terminal-specific DL subband from the base station. The terminal determines the frequency resources determined from this configuration information as the frequency resources that constitute the terminal-specific DL subband.

[0529] For example, the terminal may be configured with information about the starting PRB position and / or PRB size that constitute one or two DL subbands.

[0530] Alternatively, for example, a terminal may be instructed to receive SCS information to configure frequency resources constituting a terminal-specific DL subband. In this case, the terminal may determine cell-specific DL subband information corresponding to / related to the instructed SCS as a terminal-specific DL subband.

[0531] Option 2. For this purpose, the terminal may receive information from the base station about the amount of DL subbands added (e.g., number of PRBs) compared to cell-specific DL subbands or information about the amount of DL subbands reduced (e.g., number of PRBs).

[0532] When information about the amount of DL subbands (e.g., the number of PRBs) added compared to a cell-specific DL subband is set, and the amount of added DL subbands is A PRBs, the UE can determine the resources extended by A PRBs in the direction in which the cell-specific UL subband exists from the frequency resources constituting the cell-specific DL subband for each DL subband as the UE-specific DL subband. That is, when the cell-specific DL subband is composed of X PRBs from one edge of the cell, the frequency resources constituting the UE-specific DL subband can be determined to be equal to X+A PRBs from the edge of the cell.

[0533] When information about the amount of DL subbands (e.g., the number of PRBs) that are reduced (decreased) compared to a cell-specific DL subband is set, and when the amount of DL subbands that are reduced is B PRBs, the UE can determine, for each DL subband, a frequency resource adjacent to a cell-specific UL subband among the frequency resources constituting the cell-specific DL subband, which is reduced by B PRBs, as the UE-specific DL subband. That is, when the cell-specific DL subband is composed of X PRBs from one edge of the cell, the frequency resource constituting the UE-specific DL subband can be determined to be equal to XB PRBs from the edge of the cell.

[0534] When two DL subbands exist, this information can be configured independently for each DL subband, or one configuration information can be applied commonly to both DL subbands.

[0535] If the terminal has not been set with frequency resource information of a terminal-specific DL subband, the terminal-specific DL subband can be determined to be the same as a cell-specific DL subband.

[0536] A terminal can determine that a terminal-specific UL subband is the same as a cell-specific UL subband.

[0537] A terminal may determine that a terminal-specific guard subband is the same as a resource that is not included in the terminal-specific DL subband and the terminal-specific UL subband among the frequency resources that constitute the cell.

[0538] Figure 24 shows examples of frequency resource configurations of SBFD subbands.

[0539] Figure 24 (a) shows the frequency resource configuration of a cell-specific SBFD subband, and Figure 24 (b) shows the frequency resource configuration of a terminal-specific SBFD subband.

[0540] The terminal determines the frequency resources constituting the cell-specific DL subband(s) and UL subband(s) through the frequency resource information of the cell-specific UL subband and DL subband(s) set by the base station.

[0541] Additionally, the terminal may receive terminal-specific DL subband frequency resource information from the base station. This information may be information about additional DL subbands, for example, information about the sizes of additional DL subband 1 and additional DL subband 2 of FIG. 24.

[0542] Based on this, the terminal can determine the resource that combines the cell-specific DL subband 1 resource and the additional DL subband 1 resource as the terminal-specific DL subband 1, and determine the resource that combines the cell-specific DL subband 2 resource and the additional DL subband 2 resource as the terminal-specific DL subband 2. At this time, the terminal can determine the resource excluding the frequency resource that configures the UL subband and the frequency resource that configures the terminal-specific DL subband(s) from the frequency resource that configures the system band as the terminal-specific guard subband(s) resource.

[0543] Proposal 2. The terminal receives frequency resource information of terminal-specific guard subbands from the base station.

[0544] The terminal receives frequency resource information for a terminal-specific guard subband from the base station. The terminal uses the frequency resource information for the terminal-specific guard subband to determine the frequency resources that constitute the terminal-specific guard subband.

[0545] Option 1. To achieve this, the terminal receives information about the PRB resources that constitute the terminal-specific guard subband from the base station. The terminal determines the frequency resources determined from this configuration information as the frequency resources that constitute the terminal-specific guard subband.

[0546] For example, a terminal may be configured with information regarding the PRB size that constitutes one or two guard subbands. In this case, the terminal may determine PRB resources equal to the PRB size set from the boundary of the UL subband as terminal-specific guard subbands.

[0547] Alternatively, for example, a terminal may be instructed to receive SCS information to configure frequency resources constituting a terminal-specific guard subband. In this case, the terminal may determine cell-specific guard subband information corresponding to / related to the instructed SCS as a terminal-specific DL subband.

[0548] Option 2. For this purpose, the terminal may receive information from the base station about the amount of guard subbands added (e.g., number of PRBs) compared to the cell-specific guard subbands or information about the amount of guard subbands reduced (e.g., number of PRBs).

[0549] When information about the amount of guard subbands added compared to cell-specific guard subbands (e.g., the number of PRBs) is set, and when the amount of added guard subbands is A PRBs, the terminal can determine a resource extended by A PRBs in the direction in which the DL subband exists for each guard subband as the terminal-specific guard subband. That is, when the cell-specific guard subband is composed of X PRBs, the frequency resource constituting the terminal-specific guard subband can be determined to be equal to X+A PRBs from the boundary of the UL subband.

[0550] When information about the amount of guard subbands (e.g., the number of PRBs) that are reduced (decreased) compared to a cell-specific guard subband is set, and when the amount of guard subbands to be reduced is B PRBs, the terminal can determine, for each guard subband, a frequency resource adjacent to a DL subband among the frequency resources constituting the cell-specific guard subband, in which the frequency resources are reduced by B PRBs, as the terminal-specific guard subband. That is, when the cell-specific guard subband is composed of X PRBs, the frequency resource constituting the terminal-specific guard subband can be determined to be equal to XB PRBs from the boundary of the UL subband of the cell.

[0551] When two guard subbands exist, this information can be configured independently for each guard subband, or a single configuration information can be applied commonly to both guard subbands.

[0552] If the terminal has not been set with frequency resource information of a terminal-specific guard subband, the terminal-specific guard subband can be determined to be the same as the cell-specific guard subband.

[0553] Alternatively, the terminal may determine that the terminal-specific UL subband is the same as the cell-specific UL subband.

[0554] Alternatively, the terminal may determine that the terminal-specific DL subband is the same as a resource that is not included in the terminal-specific DL subband and the terminal-specific guard subband among the frequency resources that constitute the cell.

[0555] Figure 25 illustrates frequency resources constituting a guard subband.

[0556] Figure 24 (a) illustrates a frequency resource configuration of a cell-specific SBFD subband, and Figure 24 (b) illustrates a frequency resource configuration of a terminal-specific SBFD subband. The terminal determines a frequency resource constituting a cell-specific guard subband based on frequency resource information of cell-specific UL subbands and DL subband(s) configured from a base station. The terminal can determine a resource excluding a frequency resource constituting a cell-specific UL subband and a frequency resource constituting a cell-specific DL subband(s) from the frequency resources constituting the system band as a cell-specific guard subband(s) resource.

[0557] Additionally, the terminal may receive terminal-specific guard subband frequency resource information from the base station. This information may be information about a reduced DL subband, for example, information about the sizes of reduced guard subband 1 and reduced guard subband 2 of FIG. 25. Based on this, the terminal may determine a resource excluding the reduced guard subband 1 resource from the cell-specific guard subband 1 resource as terminal-specific guard subband 1, and may determine a resource that combines the cell-specific guard subband 2 resource and the reduced guard subband 2 resource as terminal-specific guard subband 2. In this case, the terminal may determine a resource excluding the frequency resource configuring the UL subband and the frequency resource configuring the terminal-specific guard subband(s) from the frequency resource configuring the system band as terminal-specific DL subband(s) resources.

[0558] B. Configuration signaling and DL / UL usable PRB determination

[0559] The frequency resource information of the terminal-specific SBFD subband as described above is set through the following signaling, and from this, the terminal can determine the DL / UL available PRB resources according to the operating BWP.

[0560] Method 1. A method of applying the same terminal-specific SBFD subband resource information to all BWPs.

[0561] Frequency resource information for a terminal-specific SBFD subband is configured through RRC signaling and can be applied equally to all BWPs on which the terminal operates. The terminal receives frequency resource configuration information for a terminal-specific SBFD subband from the base station through RRC signaling, and can apply the frequency resource information for the terminal-specific SBFD subband determined from this equally to all BWPs on which the terminal operates.

[0562] Based on the terminal-specific DL subband frequency resources determined as described above, the terminal can determine the PRB resources included in the terminal-specific DL subband within the DL BWP in which the terminal operates as DL available PRBs.

[0563] Alternatively, the terminal may determine a PRB resource excluding a terminal-specific guard subband among PRB resources included in a cell-specific DL subband within the DL BWP in which the terminal operates as a DL available PRB.

[0564] The terminal can perform reception of DL signals / channels within the DL available PRB in the SBFD symbol, and / or cannot perform reception of DL signals / channels outside the DL available PRB resources.

[0565] A terminal may determine a PRB resource included in a cell-specific UL subband within the UL BWP in which it operates as a UL available PRB. The terminal may perform reception of UL signals / channels within the UL available PRB in the SBFD symbol. And / or may not perform reception of UL signals / channels outside the UL available PRB resources.

[0566] When receiving an RB resource that constitutes a terminal-specific SBFD subband resource, an assumed subcarrier spacing (SCS) (e.g., a reference SCS) is required to determine the actual frequency resource implied by the information. The terminal can determine this reference SCS as follows.

[0567] i) The terminal can receive information about the reference SCS applied / assumed for terminal-specific SBFD subband configuration from the base station.

[0568] ii) Alternatively, the terminal may receive terminal-specific SBFD subband configuration information applicable to each SCS for multiple SCSs supported by the cell.

[0569] Method 2. Method of applying terminal-specific SBFD subband resource information according to BWP.

[0570] Frequency resource information of a terminal-specific SBFD subband can be configured via RRC signaling and applied only to some BWPs. To this end, when the frequency resource information of a terminal-specific SBFD subband is configured, information on the BWP(s) to which the information applies can be indicated. In this case, the terminal determines that the terminal-specific SBFD subband information is applied only to the indicated BWP(s), and that the terminal-specific SBFD subband information is not applied to other BWPs. At this time, frequency resource information of multiple terminal-specific SBFD subbands can be configured, and the BWP(s) to which the information is applied can be configured differently / independently for each configuration information.

[0571] At this time, when receiving an RB resource that constitutes a terminal-specific SBFD subband resource, a subcarrier spacing (SCS) (e.g., a reference SCS) is required to determine the actual frequency resource implied by the information. The terminal can determine this reference SCS as follows.

[0572] The terminal may receive information about the reference SCS applied / assumed for terminal-specific SBFD subband configuration from the base station. Alternatively, the terminal may receive terminal-specific SBFD subband configuration information applied to each SCS for multiple SCSs supported by the cell.

[0573] Frequency resource information of a terminal-specific SBFD subband can be configured within a BWP configuration and thus be specifically configured for the BWP. When a terminal receives frequency resource information of a terminal-specific SBFD subband within a specific BWP configuration, the terminal can determine that the frequency resource information of the terminal-specific SBFD subband is applied only to the BWP configured in the BWP configuration for which such information is configured.

[0574] At this time, when the RB resources constituting the terminal-specific SBFD subband resources are indicated, a subcarrier spacing (SCS) (e.g., a reference SCS) that is assumed to determine the actual frequency resources that the information implies is required. When the terminal receives frequency resource information of the terminal-specific SBFD subband within a specific BWP configuration, the terminal can determine the SCS applied to the BWP as the reference SCS for determining the terminal-specific SBFD subband resources.

[0575] If there is a BWP to which the frequency resource information of the terminal-specific SBFD subband is not applied, the cell-specific SBFD subband information can be determined and applied as the terminal-specific SBFD subband information.

[0576] Based on the terminal-specific DL subband frequency resources determined as described above, the terminal can determine the PRB resources included in the terminal-specific DL subband applied to the DL BWP in which the terminal operates as DL available PRBs.

[0577] Alternatively, the terminal may determine a PRB resource, excluding a terminal-specific guard subband applied to the BWP among the PRB resources included in the cell-specific DL subband within the DL BWP in which the terminal operates, as a DL available PRB.

[0578] The terminal can perform reception of DL signals / channels within the DL available PRB in the SBFD symbol, and / or cannot perform reception of DL signals / channels outside the DL available PRB resources.

[0579] A terminal may determine a PRB resource included in a cell-specific UL subband within the UL BWP in which it operates as a UL available PRB. The terminal may perform reception of UL signals / channels within the UL available PRB in the SBFD symbol. And / or may not perform reception of UL signals / channels outside the UL available PRB resources.

[0580] C. Adaptation of UE-specific subband

[0581] The terminal determines the frequency resources of the cell-specific SBFD subband (e.g., DL, UL, and / or guard subband whose frequency resources are determined based on cell-specific SBFD subband information) and the terminal-specific SBFD subband (e.g., DL, UL, and / or guard subband whose frequency resources are determined based on terminal-specific SBFD subband information) as described above, and from this, the terminal can determine the frequency resources (e.g., DL available PRB(s)) that can perform reception of a DL signal / channel in an SBFD symbol and the frequency resources (e.g., UL available PRB(s)) that can perform transmission of a UL signal / channel. In the present disclosure, DL available PRB(s) and UL available PRB(s) resources determined by a terminal based on a cell-specific SBFD subband are referred to as cell-specific DL available PRB(s) and cell-specific UL available PRB(s), and DL available PRB(s) and UL available PRB(s) resources determined by a terminal-specific SBFD subband are referred to as terminal-specific DL available PRB(s) and terminal-specific UL available PRB(s).

[0582] The configuration of the applicable DL subbands needs to vary depending on whether the DL signal / channel received by a terminal is terminal-specific or transmitted commonly to multiple terminals. For DL ​​signals / channels received by multiple terminals, the DL signal / channel must be transmitted using frequency resources that allow all terminals to receive the DL signal / channel.

[0583] Additionally, the configuration of DL subbands can vary depending on the environment of the DL channel received by the terminal. When the CLI environment changes, DL resources can be used more flexibly by determining more or fewer resources as DL subband resources.

[0584] At this time, the terminal may apply specific subband information among cell-specific SBFD subband information and terminal-specific SBFD subband information depending on the situation / condition / capability, etc. At this time, only one of the following proposals may be applied, or multiple proposals may be applied together.

[0585] (1) Depending on the type of DL signal / channel received by the terminal, either a cell-specific DL subband (cell-specific DL subband information) or a terminal-specific DL subband (terminal-specific DL subband information) may be applied. That is, depending on the type of DL signal / channel received, the terminal may apply a cell-specific DL subband to receive a DL signal / channel within the cell-specific DL available PRB(s), or apply a terminal-specific DL subband to receive a DL signal / channel within the terminal-specific DL available PRB(s).

[0586] For example, when a terminal receives all or part of the following DL signals / channels, it may perform reception of the DL signals / channels within the cell-specific DL available PRB(s) by applying cell-specific DL subbands.

[0587] 1) SS / PBCH

[0588] 2) PDCCH by cell-specific search space

[0589] 3) PDSCH scheduled by cell-specific search space

[0590] 4) PDSCH carrying SIB (PDSCH scheduled by SI-RNTI)

[0591] 5) PDSCH for RAR (PDSCH scheduled by RA-RNTI)

[0592] 6) PDSCH for paging (PDSCH scheduled by P-RNTI)

[0593] For example, when a terminal receives all or part of the following DL signals / channels, the terminal may perform reception of the DL signals / channels within the terminal-specific DL available PRB(s) by applying the terminal-specific DL subband.

[0594] 1) PDCCH by terminal-specific search space

[0595] 2) PDSCH scheduled by terminal-specific search space

[0596] 3) PDSCH scheduled by C-RNTI

[0597] (2) Depending on the network configuration / instruction, a cell-specific DL subband or a terminal-specific DL subband may be applied for reception of a specific DL signal / channel. That is, a terminal may apply a cell-specific DL subband according to the network configuration / instruction to receive a specific DL signal / channel and perform reception of the corresponding DL signal / channel within the cell-specific DL available PRB(s), or apply a terminal-specific DL subband to perform reception of the corresponding DL signal / channel within the terminal-specific DL available PRB(s).

[0598] For example, when a terminal is configured with a specific CSI-RS resource or a set of CSI-RS resources, the terminal may be configured with whether to apply a cell-specific DL subband or a terminal-specific DL subband to receive CSI-RS resources within the corresponding CSI-RS resource or set of CSI-RS resources. In this case, when receiving a specific CSI-RS, if the terminal is instructed to apply a cell-specific DL subband for reception, the terminal may receive the corresponding CSI-RS using frequency resources within the cell-specific DL available PRB(s), and if the terminal-specific DL subband is instructed to apply, the terminal may receive the corresponding CSI-RS using frequency resources within the terminal-specific DL available PRB(s).

[0599] For example, when scheduling / configuring PDSCH transmission, it may be configured / instructed whether a cell-specific DL subband or a terminal-specific DL subband will be applied for reception of the corresponding PDSCH. For example, whether a cell-specific DL subband or a terminal-specific DL subband will be applied for reception of the corresponding PDSCH may be indicated together in the DCI that schedules the PDSCH. In this case, when a cell-specific DL subband is instructed to be applied for reception when receiving a specific PDSCH, the terminal may receive the corresponding PDSCH using frequency resources within the cell-specific DL available PRB(s), and when a terminal-specific DL subband is instructed to be applied, the terminal may receive the corresponding PDSCH using frequency resources within the terminal-specific DL available PRB(s).

[0600] (3) As proposed in Method 2 of the above Section B, either a terminal-specific SBFD subband or a cell-specific SBFD subband may be applied depending on the BWP (e.g., active BWP) in which the terminal operates. When frequency resource information of the terminal-specific SBFD subband is set, information on the BWP(s) to which the information is applied may also be set.

[0601] In this case, when the terminal operates in a BWP to which a terminal-specific SBFD subband is applied, the terminal may perform reception of a DL signal / channel using frequency resources within the terminal-specific DL available PRB(s), and when the terminal operates in a BWP to which a cell-specific SBFD subband is applied, the terminal may perform reception of a DL signal / channel using frequency resources within the cell-specific DL available PRB(s).

[0602] Additionally / independently, a terminal may differently determine the frequency resources constituting a terminal-specific SBFD subband depending on circumstances / conditions / capabilities / instructions, etc. Hereinafter, the frequency resources constituting a terminal-specific SBFD subband may refer to all or only a portion of the DL subband, the UL subband, and / or the guard subband. In this case, only one of the following proposals may be applied, or multiple proposals may be applied together.

[0603] (1) As proposed in Method 2 of the above Section B, the frequency resources constituting the terminal-specific SBFD subband may differ depending on the BWP in which the terminal operates (e.g., the active BWP). In this case, frequency resource information of the terminal-specific SBFD subband may be configured within the BWP configuration. Alternatively, frequency resource information of one or more terminal-specific SBFD subbands may be configured, and BWP(s) information to which the corresponding information is applied may be configured together for each frequency resource information of each terminal-specific SBFD subband.

[0604] In this case, when the terminal operates in a specific BWP, the terminal can perform reception of DL signals / channels by applying the frequency resources of the terminal-specific SBFD subband applied in the BWP, and using the frequency resources within the terminal-specific DL available PRB(s) determined based on this. When the terminal operates in a BWP to which a cell-specific SBFD subband is applied, the terminal can perform reception of DL signals / channels by using the frequency resources within the cell-specific DL available PRB(s).

[0605] (2) When a terminal receives a DL signal / channel (e.g., PDSCH), the frequency resources constituting the terminal-specific SBFD subband applied for reception of the DL signal / channel can be determined as follows.

[0606] i) Frequency resources constituting terminal-specific DL subbands can be determined differently depending on the modulation and coding scheme (MCS) or modulation order applied to PDSCH transmission.

[0607] For example, considering that a good channel environment is required to transmit data with a high MCS, a larger MCS index, (effective / target) code rate, spectral efficiency, and / or modulation order may reduce the frequency resources constituting the terminal-specific DL subband. In other words, the size of the reduced DL subband (or the size of the additional guard subband) may increase.

[0608] ii) When scheduling / configuring PDSCH transmission, information about the frequency resources constituting the terminal-specific DL subband applicable to reception of the corresponding PDSCH may be indicated / configured together. For example, information about the frequency resources constituting the terminal-specific DL subband (e.g., information about the size of the reduced DL subband or the size of the additional guard subband) may be indicated together within the DCI scheduling the PDSCH.

[0609] In this case, the terminal may differently determine the frequency resources constituting the terminal-specific DL subband applied for reception of the DL channel, and perform reception of the corresponding DL channel using the frequency resources within the DL available PRB(s) determined based on the determination.

[0610] Additionally / independently, the terminal may be configured with terminal-specific SBFD subband information, and based on this, may be instructed / configured or may determine information on the amount of terminal-specific DL subband and / or terminal-specific guard subband to be actually applied.

[0611] Information about the amount of actually applied terminal-specific DL subbands may be, for example, the difference in PRB amount of the actually applied terminal-specific DL subband compared to the terminal-specific DL subband (the amount of terminal-specific DL subband that is reduced and / or increased). Or, information about the amount of actually applied terminal-specific guard subbands may be, for example, the difference in PRB amount of the actually applied terminal-specific guard subband compared to the terminal-specific guard subband (the amount of terminal-specific guard subband that is increased and / or decreased).

[0612] At this time, information about the amount of terminal-specific DL subbands actually applied or information about the amount of terminal-specific guard subbands can be determined as follows.

[0613] When a terminal receives a DL signal / channel (e.g., PDSCH), information about the amount of terminal-specific DL subbands and / or terminal-specific guard subbands actually applied for reception of the DL signal / channel can be determined differently.

[0614] For example, information about the amount of frequency resources of a terminal-specific DL subband or frequency resources of a terminal-specific guard subband that is actually applied can be determined based on the MCS or modulation order applied to PDSCH transmission.

[0615] Alternatively, when scheduling / configuring PDSCH transmission, information regarding the frequency resources of a terminal-specific DL subband or the frequency resources of a terminal-specific guard subband applicable to reception of the corresponding PDSCH may be indicated / configured together. For example, information regarding the frequency resources of a terminal-specific DL subband or the frequency resources of a terminal-specific guard subband may be indicated together in the DCI scheduling the PDSCH.

[0616] Meanwhile, to define the location of one subband, information on the starting RB (resource block) and subband size may generally be required.

[0617] For example, a terminal can be instructed about the starting frequency location and carrier bandwidth information of a DL carrier and an UL carrier through the FrequencyInfoDL IE and FrequencyInfoUL IE. When a subband is located on one side of a carrier, one boundary of the subband is aligned with the boundary of the frequency resources constituting the carrier, so the terminal can determine the frequency location of the subband with only one piece of information, either the start RB or the subband size.

[0618] For example, for a UL subband in SBFD subband pattern 1, the start RB is the same as the lowest RB position constituting the carrier, so the subband position can be determined with only the subband size information.

[0619] Meanwhile, in the case of the DL subband in SBFD subband pattern 1, since the position of the last RB is the same as the position of the highest RB constituting the carrier, the subband position can be determined by knowing only the information on the starting RB position of the DL subband or the information on the subband size.

[0620] Based on this principle, the minimum information required to determine the positions of DL and UL subbands for each SBFD subband pattern and the method for determining the SBFD subband frequency resources of a terminal based on this information can be as follows.

[0621] For example, when SBFD subband pattern 1 is applied (where the UL subband is located on the lower side of the carrier frequency resource and the DL subband is located on the upper side of the carrier frequency resource), the UE may need information about the subband size to determine the UL subband location. This information may be replaced with information about the last RB (the location of the last RB constituting the subband).

[0622] Since the location of the starting RB constituting the UL subband is the same as the lowest RB location constituting the carrier frequency resource, information about the starting RB may not be separately set. In this case, the terminal may determine the location of the lowest RB constituting the carrier frequency resource as the location of the starting RB constituting the UL subband. The terminal may determine the location of the lowest RB constituting the carrier frequency resource as the RB location that is offsetToCarrier from pointA. Point A may refer to a frequency location that serves as a common reference point of the resource block grid.

[0623] Based on this information, the terminal can determine that the continuous RB resources from the start RB (e.g., the lowest RB position constituting the carrier frequency resources) to the subband size constitute a UL subband. Alternatively, based on this information, the terminal can determine that the continuous RB resources from the start RB (e.g., the lowest RB position constituting the carrier frequency resources) to the last RB constitute a UL subband.

[0624] To determine the DL subband location, the terminal may need information about the subband size. This information can be replaced with information about the starting RB (the location of the first RB that constitutes the subband).

[0625] Since the position of the last RB constituting the DL subband is the same as the position of the highest RB constituting the carrier frequency resource, information about the last RB may not be separately set. In this case, the terminal may determine the position of the highest RB constituting the carrier frequency resource as the position of the starting RB constituting the DL subband. The terminal may determine the position of the last RB constituting the DL subband as the RB position that is spaced apart by carrierBandwidth from the lowest RB position constituting the carrier frequency resource (e.g., the RB position that is spaced apart by offsetToCarrier from point A).

[0626] Based on this information, the terminal can determine that the continuous RB resources from the start RB to the last RB constitute a DL subband. Alternatively, based on this information, the terminal can determine that the continuous RB resources in reverse order of the RB index from the last RB (e.g., the highest RB position constituting the carrier frequency resources) constitute a DL subband, equal to the subband size.

[0627] When SBFD subband pattern 2 is applied (where the DL subband is located on the lower side of the carrier frequency resource and the UL subband is located on the upper side of the carrier frequency resource), the UE may need information about the subband size to determine the DL subband location. This information may be replaced with information about the last RB (the location of the last RB constituting the subband).

[0628] Since the location of the starting RB constituting the DL subband is identical to the lowest RB location constituting the carrier frequency resource, information regarding the starting RB may not be separately configured. In this case, the terminal may determine the location of the lowest RB constituting the carrier frequency resource as the location of the starting RB constituting the DL subband. The terminal may determine the location of the lowest RB constituting the carrier frequency resource as the RB location located at offsetToCarrier from Point A.

[0629] Based on this information, the terminal can determine that the continuous RB resources from the start RB (e.g., the lowest RB position constituting the carrier frequency resources) to the subband size constitute the DL subband. Alternatively, based on this information, the terminal can determine that the continuous RB resources from the start RB (e.g., the lowest RB position constituting the carrier frequency resources) to the last RB constitute the DL subband.

[0630] To determine the UL subband location, a terminal may need information about the subband size. This information can be replaced with information about the starting RB (the location of the first RB constituting the subband).

[0631] Since the position of the last RB constituting the UL subband is the same as the position of the highest RB constituting the carrier frequency resource, information about the last RB may not be separately set. In this case, the terminal may determine the position of the highest RB constituting the carrier frequency resource as the position of the starting RB constituting the UL subband. The terminal may determine the position of the last RB constituting the UL subband as the RB position that is spaced apart by carrierBandwidth from the lowest RB position constituting the carrier frequency resource (e.g., the RB position that is spaced apart by offsetToCarrier from point A).

[0632] Based on this information, the terminal can determine that the continuous RB resources from the start RB to the last RB (e.g., the highest RB position constituting the carrier frequency resources) constitute a UL subband. Alternatively, based on this information, the terminal can determine that the continuous RB resources in the reverse order of the RB index from the last RB (e.g., the highest RB position constituting the carrier frequency resources) constitute a UL subband in the same number as the subband size.

[0633] When SBFD subband pattern 3 is applied (where the UL subband is located in the middle of the carrier frequency resource, and the two DL subbands, DL subband 1 and DL subband 2, are located on the lower and upper sides of the carrier frequency resource, respectively), the UE may need information about the subband size to determine the UL subband location. This information may be replaced with information about the last RB (the location of the last RB constituting the subband).

[0634] Alternatively, the terminal may require information about the starting RB to determine the UL subband location. If the SBFD subband has a symmetrical structure with respect to the center frequency, or if the center of the UL subband is aligned with the center frequency of the carrier, information about the starting RB may be omitted.

[0635] In this case, the terminal can determine that the start RB of the UL subband is equal to floor((carrier bandwidth-subband size) / 2). Floor(x) is the largest integer less than or equal to x. In this case, the carrier bandwidth may be equal to carrierBandwidth set through SCS-SpecificCarrier in the FrequencyInfoUL IE by higher layer signaling. In addition, the subband size may mean subband size information for the corresponding UL subband.

[0636] Based on this information, the terminal can determine that the continuous RB resources from the start RB to the subband size constitute a UL subband. Alternatively, based on this information, the terminal can determine that the continuous RB resources from the start RB to the last RB constitute a UL subband.

[0637] The terminal may need information about the subband size to determine the location of DL subband 1. This information may be replaced with information about the last RB (the location of the last RB constituting the subband).

[0638] Since the location of the starting RB constituting the DL subband is identical to the lowest RB location constituting the carrier frequency resource, information regarding the starting RB may not be separately configured. In this case, the terminal may determine the location of the lowest RB constituting the carrier frequency resource as the location of the starting RB constituting the DL subband. The terminal may determine the location of the lowest RB constituting the carrier frequency resource as the RB location located at offsetToCarrier from Point A.

[0639] Based on this information, the terminal can determine that the continuous RB resources from the start RB (e.g., the lowest RB position constituting the carrier frequency resources) to the subband size constitute the DL subband. Alternatively, based on this information, the terminal can determine that the continuous RB resources from the start RB (e.g., the lowest RB position constituting the carrier frequency resources) to the last RB constitute the DL subband.

[0640] The terminal may need information about the subband size to determine the location of DL subband 2. This information may be replaced with information about the starting RB (the location of the first RB constituting the subband).

[0641] If the SBFD subband has a symmetrical structure with respect to the center frequency, or if DL subband 1 and DL subband 2 have the same subband size, the subband size information for DL ​​subband 2 may be omitted. In this case, the terminal may determine that the subband size of DL subband 2 is the same as the subband size of DL subband 1.

[0642] Since the position of the last RB constituting the DL subband is identical to the highest RB position constituting the carrier frequency resource, information regarding the last RB may not be separately configured. In this case, the terminal may determine the highest RB position constituting the carrier frequency resource as the position of the starting RB constituting the DL subband. The terminal may determine the RB position as the carrierBandwidth position away from the lowest RB position constituting the carrier frequency resource (e.g., the RB position offsetToCarrier away from Point A).

[0643] Based on this information, the terminal can determine that the continuous RB resources from the start RB to the last RB constitute a DL subband. Alternatively, based on this information, the terminal can determine that the continuous RB resources in reverse order of the RB index from the last RB (e.g., the highest RB position constituting the carrier frequency resources) constitute a DL subband in the same number as the subband size.

[0644] The terminal can receive information about the frequency resources that constitute the SBFD subbands from the base station through SIB and / or RRC signaling. This information can be more specifically indicated to the terminal from the base station using the methods below.

[0645] Method 1.

[0646] The terminal may receive one of the configuration information for SBFD subband pattern 1, SBFD subband pattern 2, and SBFD subband pattern 3. In this case, each configuration information may be configured as follows.

[0647] 1) SBFD subband pattern 1.

[0648] UL Subband Size: Refers to the subband size of the UL subband located on the lower side of the carrier. DL Subband Size: Refers to the subband size of the DL subband located on the upper side of the carrier.

[0649] 2) SBFD subband pattern 2.

[0650] UL Subband Size: Refers to the subband size of the UL subband located on the upper side of the carrier. DL Subband Size: Refers to the subband size of the DL subband located on the lower side of the carrier.

[0651] 3) SBFD subband pattern 3.

[0652] UL Subband Start RB: This refers to the starting RB position of the UL subband located in the center of the carrier. UL Subband Size: This refers to the subband size of the UL subband located in the center of the carrier. DL Subband 1 Size: This refers to the subband size of the DL subband located on the lower side of the carrier. DL Subband 2 Size: This refers to the subband size of the DL subband located on the upper side of the carrier.

[0653] The terminal can determine the frequency resources constituting the SBFD subband pattern and UL / DL subband(s) applied to the cell based on the configuration information received / configured among the configuration information for SBFD subband pattern 1, SBFD subband pattern 2, and SBFD subband pattern 3.

[0654] For SBFD subband pattern 3, if the SBFD subband has a symmetrical structure with respect to the center frequency, or if the center of the UL subband is aligned with the center frequency of the carrier, information about the start RB may be omitted.

[0655] In SBFD subband pattern 3, the SBFD subband may always have a symmetrical structure with respect to the center frequency, or the center of the UL subband may be aligned with the center frequency of the carrier. In such cases, the terminal is not instructed about the UL subband start RB, and can determine that the UL subband start RB is equal to floor((carrier bandwidth - subband size) / 2).

[0656] Alternatively, the terminal may be instructed to configure SBFD subband pattern 3, but may not be instructed with information about the UL subband start RB. In this case, the terminal may not be instructed with information about the UL subband start RB, and may determine that the UL subband start RB is equal to floor((carrier bandwidth - subband size) / 2).

[0657] For SBFD subband pattern 3, if the DL subband 1 size and the DL subband 2 size are the same, the information may be omitted.

[0658] In SBFD subband pattern 3, the DL subband 1 size and DL subband 2 size may always be the same. In this case, the terminal may receive information on a single DL subband size instead of the DL subband 1 size and DL subband 2 size, and may determine that the corresponding DL subband size applies to both DL subbands.

[0659] Alternatively, the terminal may be instructed to configure SBFD subband pattern 3, but may not be instructed with information about the DL subband 1 size or DL ​​subband 2 size. In this case, the terminal may determine that the DL subband 1 size and the DL subband 2 size are the same.

[0660] Method 2.

[0661] The terminal can receive information about the SBFD subband pattern applied to the SBFD symbol and information about the configuration of each SBFD subband.

[0662] In this case, the setup information can be configured as follows:

[0663] SBFD Subband Pattern: This refers to an instruction on information about the form of the SBFD subband pattern applied among the three SBFD subband patterns (SBFD Subband Pattern 1, SBFD Subband Pattern 2, and SBFD Subband Pattern 3).

[0664] UL Subband Size: This refers to the size of the UL subband.

[0665] UL Subband Start RB: Indicates the starting RB position of the UL subband. This information may be indicated only when SBFD subband pattern 3 is indicated by the SBFD subband pattern. Although SBFD subband pattern 3 is indicated by the SBFD subband pattern, this information may not be indicated if the SBFD subband always has a symmetrical structure based on the center frequency, or if the center of the UL subband is aligned with the center frequency of the carrier.

[0666] DL Subband Size: Indicates the size of the DL subband. When SBFD subband pattern 3 is indicated by the SBFD subband pattern, information about the DL subband size can be independently indicated for DL ​​subband 1 and DL subband 2. Or, even when SBFD subband pattern 3 is indicated by the SBFD subband pattern, if the DL subband 1 size and DL subband 2 size are the same, only one DL subband size information can be indicated.

[0667] Method 3.

[0668] The terminal can receive configuration information for frequency resources that comprise the UL subband, DL subband 1 (the lower DL subband), and DL subband 2 (the higher DL subband). In this case, only some information may be selectively configured depending on the configuration of the SBFD subband.

[0669] UL subband.

[0670] Start RB: Indicates the starting RB location of the UL subband. This is set only when the UL subband is located in the center of the carrier, and may be omitted when located on the lower / upper side of the carrier. Subband Size: Indicates the subband size of the UL subband.

[0671] DL Subband 1 (Lower DL Subband): Set only when there is a DL subband located on the lower side of the carrier, and may be omitted when there is a DL subband located only on the upper side of the carrier. Subband Size: Indicates the subband size of DL Subband 1 (the DL subband located on the lower side of the carrier).

[0672] DL Subband 2 (Higher DL Subband): Set only when there is a DL subband located on the upper side of the carrier, and may be omitted when there is a DL subband located only on the lower side of the carrier. Subband Size: Indicates the subband size of DL Subband 2 (the DL subband located on the upper side of the carrier).

[0673] Method 4.

[0674] In order to receive configuration information for frequency resources constituting a UL subband, the terminal may selectively set one of configuration information for frequency resources constituting UL subband 1 (e.g., a UL subband located on the lower side of the carrier, such as in SBFD subband pattern 1 of FIG. 23 (a)), UL subband 2 (e.g., a UL subband located on the upper side of the carrier, such as in SBFD subband pattern 2 of FIG. 23 (b)), or UL subband 3 (e.g., a UL subband located in the middle of the carrier, such as in SBFD subband pattern 3 of FIG. 23 (c)).

[0675] UL Subband 1: Can be set only when the UL subband is located on the lower side of the carrier. Subband Size: Indicates the subband size of UL Subband 1 (the UL subband located on the lower side of the carrier).

[0676] UL Subband 2: Can be set only when the UL subband is located on the upper side of the carrier. Subband Size: Refers to the subband size of UL Subband 2 (the UL subband located on the upper side of the carrier).

[0677] UL Subband 3: Can be set only when the UL subband is located in the middle of the carrier. Start RB: Indicates the starting RB location of the UL subband. Subband Size: Indicates the subband size of the UL subband.

[0678] Additionally, the terminal may receive configuration information for frequency resources constituting DL subbands, such as DL subband 1 (a lower DL subband) and / or DL ​​subband 2 (a higher DL subband). In this case, only some information may be selectively set, depending on the configuration of the DL subband.

[0679] DL Subband 1 (Lower DL Subband): Set only when there is a DL subband located on the lower side of the carrier, and may be omitted when there is a DL subband located only on the upper side of the carrier. Subband Size: Indicates the subband size of DL Subband 1 (the DL subband located on the lower side of the carrier).

[0680] DL Subband 2 (Higher DL Subband): Set only when there is a DL subband located on the upper side of the carrier, and may be omitted when there is a DL subband located only on the lower side of the carrier. Subband Size: Indicates the subband size of DL Subband 2 (the DL subband located on the upper side of the carrier).

[0681] At this time, settings for frequency resources constituting the UL subband can be set through the FrequencyInfoUL IE, and settings for frequency resources constituting the DL subband can be set through the FrequencyInfoDL IE.

[0682] FrequencyInfoDL IE and FrequencyInfoUL IE provide basic parameters of downlink carriers and uplink carriers, and since SCS-SpecificCarrierList is included in both FrequencyInfoDL IE and FrequencyInfoUL IE, the frequency locations of UL subbands and DL subbands can be explicitly set in FrequencyInfoDL IE and FrequencyInfoUL IE, respectively.

[0683] Fig. 26 illustrates an operation method of a terminal according to one embodiment of the present disclosure.

[0684] Referring to FIG. 26, the terminal receives first configuration information for setting a cell-specific downlink subband (cell-specific SBFD DL subband) from the network (S261).

[0685] The terminal receives second configuration information for setting a terminal-specific downlink subband (terminal-specific SBFD DL subband) from the network (S262).

[0686] The terminal receives a downlink signal from the network in one of the cell-specific downlink subband and the terminal-specific downlink subband, and if the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a physical downlink shared channel (PDSCH) scheduled by downlink control information (DCI), the terminal receives the downlink signal in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction from the network (S263).

[0687] Specifically, when the downlink signal is the CSI-RS, the configuration information for setting a resource to receive the CSI-RS may include information indicating one of the cell-specific downlink subband and the terminal-specific downlink subband.

[0688] If the downlink signal is the signal through the PDSCH scheduled by the DCI, the DCI may include information indicating one of the cell-specific downlink subband and the terminal-specific downlink subband.

[0689] In some embodiments, if the downlink signal is a predetermined specific signal, the downlink signal may be received in one of the cell-specific downlink subband and the terminal-specific downlink subband without instructions from the network.

[0690] These operations are described in detail in “C. Adaptation of UE-specific subband”.

[0691] The terminal-specific downlink subband may be larger in frequency domain than the cell-specific downlink subband.

[0692] According to the method according to the present disclosure, in an SBFD system, more frequency resources can be used as DL subbands in a terminal-specific manner, so that frequency resources can be used more efficiently.

[0693] The terminal of FIG. 26 may be, for example, an RRC connection mode terminal, in which case the SBFD subband time position may be set within a period. For example, if only one TDD-UL-DL pattern is set, the period may be selected from one of the following options.

[0694] Option 1: The above period is the same as the TDD-UL-DL pattern period set by dl-UL-TransmissionPeriodicity of TDD-UL-DL-ConfigCommon.

[0695] Option 2: The above period is an integer multiple of the TDD-UL-DL pattern period set by dl-UL-TransmissionPeriodicity in TDD-UL-DL-ConfigCommon.

[0696] A slot may consist of SBFD symbols and non-SBFD symbols.

[0697] In the semi-static indication of the SBFD subband time position, when only one TDD-UL-DL pattern is set, the SBFD symbols are set consecutively within the TDD-UL-DL pattern period.

[0698] When two TDD-UL-DL patterns are configured and SBFD symbols are configured for only one of the patterns, the SBFD symbols are configured consecutively within the TDD-UL-DL pattern period. When two TDD-UL-DL patterns are configured and SBFD symbols are configured for both of the patterns, the SBFD symbols are configured consecutively within each TDD-UL-DL pattern period.

[0699] SBFD symbols are configured in the downlink (DL) and / or flexible symbols configured in TDD-UL-DL-ConfigCommon. The configured SBFD symbols can start from any symbol within a slot and end at any symbol within the slot. The referenceSubcarrierSpacing in TDD-UL-DL-ConfigCommon is used as the reference SCS.

[0700] That is, together with the terminal operation for the frequency domain described in FIG. 26, the terminal operation for the time domain related to the SBFD subband time positions may also be applied, and at this time, the following two options may be considered. If the SBFD subband time positions are set within a period, Option 1: The period is identical to the TDD-UL-DL pattern period set by dl-UL-TransmissionPeriodicity of TDD-UL-DL-ConfigCommon. Option 2: The period is an integer multiple of the TDD-UL-DL pattern period set by dl-UL-TransmissionPeriodicity of TDD-UL-DL-ConfigCommon.

[0701] According to an embodiment, the terminal may further receive position information indicating the positions of subband full duplex (SBFD) symbols within a pattern (e.g., the aforementioned TDD-UL-DL pattern) period set by an information element defining a cell-specific uplink-downlink TDD (time division duplex) configuration.

[0702] At this time, the location information may include information about the starting SBFD symbol and the last SBFD symbol of the SBFD symbols.

[0703] According to an embodiment, the position of the last SBFD symbol of the consecutive SBFD symbols within the pattern period may be given based on an offset position relative to the position of the last symbol among the symbols set to downlink or flexible by the cell-specific uplink-downlink TDD configuration. Additionally, if the position of the last SBFD symbol of the consecutive SBFD symbols is not indicated, the position of the last symbol among the symbols set to DL or flexible by the cell-specific uplink-downlink TDD configuration (TDD-UL-DL-ConfigCommon) within the pattern period may be determined as the last SBFD symbol position.

[0704] By this method, the signaling overhead for indicating the SBFD symbol is reduced, and the SBFD symbol can be prevented from being set to a symbol set as a UL symbol by the cell-specific uplink-downlink TDD configuration (TDD-UL-DL-ConfigCommon).

[0705] This has been described in detail in “Method 2. Method for indicating the start SBFD symbol and the last SBFD symbol” and in Method 2-1 and Method 2-2, which are specific examples of Method 2.

[0706] In some embodiments, the location information may include information about a first transition point from a non-SBFD symbol to an SBFD symbol and information about a second transition point from an SBFD symbol to a non-SBFD symbol.

[0707] For example, the symbols preceding the symbol indicated by the information about the first turning point and the symbol indicated by the information about the second turning point may be determined as SBFD symbols. This has been described in detail in “Method 3. Method for indicating a turning point from non-SBFD to SBFD and a turning point from SBFD to non-SBFD” and Method 3-1 and Method 3-2, which are specific examples of Method 3.

[0708] Fig. 27 illustrates an operation method of a base station according to one embodiment of the present disclosure.

[0709] Referring to FIG. 27, the base station transmits first configuration information for setting a cell-specific downlink subband to the terminal (S271).

[0710] The base station transmits second configuration information for setting a terminal-specific downlink subband to the terminal (S272).

[0711] The base station transmits a downlink signal to the terminal in one of the cell-specific downlink subband and the terminal-specific downlink subband, and if the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a physical downlink shared channel (PDSCH) scheduled by downlink control information (DCI), the base station transmits the downlink signal in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction of the base station (S273).

[0712] Specific operations and embodiments related to this are described above in Fig. 26.

[0713] FIG. 28 illustrates a signaling and operation method between a base station and a terminal according to one embodiment of the present disclosure.

[0714] Referring to FIG. 28, the base station transmits first configuration information for setting a cell-specific downlink subband to the terminal (S281).

[0715] The base station transmits second configuration information for setting a terminal-specific downlink subband to the terminal (S282).

[0716] For example, when transmitting configuration information that configures / informs a terminal of the resources to receive CSI-RS, the base station may include information indicating one of a cell-specific downlink subband and a terminal-specific downlink subband (S283). For example, in the example of FIG. 28, the information may indicate a terminal-specific downlink subband.

[0717] In this case, the terminal receives CSI-RS in a terminal-specific downlink subband (S284).

[0718] Although the example of Fig. 28 describes an example related to CSI-RS, this is not a limitation. For example, if the downlink signal to be transmitted by the base station is a signal through a PDSCH scheduled by DCI, the DCI may include information indicating one of a cell-specific downlink subband and a terminal-specific downlink subband, and the terminal may receive the signal on one of the cell-specific downlink subband and the terminal-specific downlink subband based on this.

[0719] Figure 29 illustrates a wireless device applicable to the present specification.

[0720] Referring to FIG. 29, 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).

[0721] 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.

[0722] The processor (102) receives first configuration information for setting a cell-specific downlink subband from a network, receives second configuration information for setting a terminal-specific downlink subband from the network, and receives a downlink signal from the network in one of the cell-specific downlink subband and the terminal-specific downlink subband, wherein, when the downlink signal is a CSI-RS or a signal through a PDSCH scheduled by DCI, the processor (102) is characterized in that the downlink signal is received in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction of the network. The specific operation thereof has been described with reference to FIGS. 18 to 28.

[0723] 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.

[0724] The processor (202) transmits first configuration information for setting a cell-specific downlink subband to the terminal, transmits second configuration information for setting a terminal-specific downlink subband to the terminal, and transmits a downlink signal to the terminal in one of the cell-specific downlink subband and the terminal-specific downlink subband, wherein, when the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a PDSCH scheduled by downlink control information (DCI), the downlink signal is transmitted in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction of the base station. The specific operation thereof has been described with reference to FIGS. 18 to 28.

[0725] 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.

[0726] 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.

[0727] For example, at least one computer readable medium (CRM) including instructions based on being executed by at least one processor performs the operations of receiving first configuration information for configuring a cell-specific downlink subband from a network, receiving second configuration information for configuring a terminal-specific downlink subband from the network, and receiving a downlink signal from the network in one of the cell-specific downlink subband and the terminal-specific downlink subband, wherein, when the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a PDSCH scheduled by downlink control information (DCI), the downlink signal is received in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction from the network. The specific operations have been described with reference to FIGS. 18 to 28.

[0728] 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.

[0729] 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.

[0730] 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.

[0731] Fig. 30 illustrates an example of a signal processing module structure. Here, signal processing may be performed in the processor (102, 202) of Fig. 29.

[0732] Referring to FIG. 30, 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).

[0733] 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.

[0734] 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.

[0735] 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.

[0736] 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.

[0737] 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.

[0738] Fig. 31 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. 29.

[0739] Referring to FIG. 31, a transmission device (e.g., a processor, a processor and a memory, or a processor and a transceiver) in a terminal or a 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).

[0740] 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).

[0741] 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.

[0742] The above complex modulation symbol can be mapped to one or more transmission layers by the layer mapper (403).

[0743] 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.

[0744] 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.

[0745] The resource block mapper (405) can assign complex modulation symbols to appropriate subcarriers and multiplex them according to the user.

[0746] 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.

[0747] The signal processing process of the receiving device may be configured as the reverse 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.

[0748] FIG. 32 illustrates an example of a wireless communication device according to an implementation example of the present disclosure.

[0749] Referring to FIG. 32, 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 global positioning system (GPS) chip (2360), a sensor (2365), a memory (2330), a subscriber identification module (SIM) card (2325), a speaker (2345), and a microphone (2350). There may be a plurality of antennas and processors.

[0750] The processor (2310) can implement the functions, procedures, and methods described in this specification. The processor (2310) of FIG. 32 may be the processor (102, 202) of FIG. 29.

[0751] 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. 32 may be the memory (104, 204) of FIG. 29.

[0752] 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.

[0753] 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. 32 may be the transceiver (106, 206) of FIG. 29.

[0754] Although not shown in FIG. 32, 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).

[0755] Fig. 32 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. 32. 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.

[0756] Figure 33 illustrates another example of a wireless device.

[0757] According to FIG. 33, 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).

[0758] The difference between the example of the wireless device described in FIG. 29 and the example of the wireless device in FIG. 33 is that in FIG. 29, the processor (102, 202) and the memory (104, 204) are separated, whereas in the example of FIG. 33, the memory (104, 204) is included in the processor (102, 202). For example, the processor and the memory may constitute a single chipset.

[0759] Fig. 34 illustrates a communication system (1) applicable to this specification.

[0760] Referring to FIG. 34, 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.

[0761] 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).

[0762] 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.

[0763] 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.

[0764] 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 two types of frequency ranges (FR1, FR2) can be as shown in Table 9 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).

[0765] [Table 9]

[0766]

[0767] 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 10 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 vehicle communications (e.g., autonomous driving).

[0768] [Table 10]

[0769]

[0770] 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 first configuration information for setting a cell-specific downlink subband from the network, The terminal receives second configuration information for setting a terminal-specific downlink subband from the network, and The terminal receives a downlink signal from the network in one of the cell-specific downlink subband and the terminal-specific downlink subband, A method characterized in that, when the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a physical downlink shared channel (PDSCH) scheduled by downlink control information (DCI), the downlink signal is received in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction of the network.

2. A method according to claim 1, wherein, when the downlink signal is the CSI-RS, the configuration information for setting a resource to receive the CSI-RS includes information indicating one of the cell-specific downlink subband and the terminal-specific downlink subband.

3. A method according to claim 1, wherein, when the downlink signal is the signal through the PDSCH scheduled by the DCI, the DCI includes information indicating one of the cell-specific downlink subband and the terminal-specific downlink subband.

4. A method according to claim 1, characterized in that, when the downlink signal is a predetermined specific signal, the downlink signal is received in one of the cell-specific downlink subband and the terminal-specific downlink subband without instructions from the network.

5. A method according to claim 1, characterized in that the terminal-specific downlink subband is larger in the frequency domain than the cell-specific downlink subband.

6. A method according to claim 1, characterized in that the terminal further receives position information indicating the positions of SBFD (subband full duplex) symbols within a pattern period set by an information element defining a cell-specific uplink-downlink TDD (time division duplex) setting.

7. A method according to claim 6, characterized in that the location information includes information on a starting SBFD symbol and a last SBFD symbol of the SBFD symbols.

8. In the 6th paragraph, a method characterized in that the position of the last SBFD symbol of consecutive SBFD symbols within the pattern period is given based on an offset position based on the position of the last symbol among symbols set as downlink or flexible by the cell-specific uplink-downlink TDD setting.

9. A method according to claim 6, characterized in that the position information includes information on a first transition point from a non-SBFD symbol to an SBFD symbol and information on a second transition point from an SBFD symbol to a non-SBFD symbol.

10. A method according to claim 9, characterized in that the symbols preceding the symbol indicated by the information about the first turning point and the symbol indicated by the information about the second turning point are determined as the SBFD symbols.

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 first configuration information for setting cell-specific downlink subbands from the network, Receive second configuration information for setting a terminal-specific downlink subband from the above network, and Receive a downlink signal from the network in one of the cell-specific downlink subband and the terminal-specific downlink subband, A terminal characterized in that, when the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a physical downlink shared channel (PDSCH) scheduled by downlink control information (DCI), the terminal receives the downlink signal in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction from the network.

12. A terminal according to claim 11, wherein, when the downlink signal is the CSI-RS, the configuration information for setting a resource to receive the CSI-RS includes information indicating one of the cell-specific downlink subband and the terminal-specific downlink subband.

13. A terminal according to claim 11, wherein, when the downlink signal is the signal through the PDSCH scheduled by the DCI, the DCI includes information indicating one of the cell-specific downlink subband and the terminal-specific downlink subband.

14. A terminal characterized in that, in the 11th paragraph, when the downlink signal is a predetermined specific signal, the terminal receives the downlink signal in one of the cell-specific downlink subband and the terminal-specific downlink subband without instructions from the network.

15. A terminal according to claim 11, wherein the terminal-specific downlink subband is larger in the frequency domain than the cell-specific downlink subband.

16. In the 11th paragraph, the terminal is characterized in that it further receives position information indicating the positions of SBFD (subband full duplex) symbols within a pattern period set by an information element defining a cell-specific uplink-downlink TDD (time division duplex) setting.

17. A terminal characterized in that, in the 16th paragraph, the location information includes information on a starting SBFD symbol and a last SBFD symbol of the SBFD symbols.

18. A terminal according to claim 16, wherein the position of the last SBFD symbol of consecutive SBFD symbols within the pattern period is given based on an offset position based on the position of the last symbol among symbols set to downlink or flexibly by the cell-specific uplink-downlink TDD setting.

19. A terminal according to claim 16, wherein the position information includes information on a first transition point from a non-SBFD symbol to an SBFD symbol and information on a second transition point from an SBFD symbol to a non-SBFD symbol.

20. A terminal characterized in that, in paragraph 19, all symbols from the symbol indicated by the information about the first switching point to the symbol indicated by the information about the second switching point are determined as the SBFD symbols.

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 first configuration information for setting cell-specific downlink subbands from the network, Receive second configuration information for setting a terminal-specific downlink subband from the above network, and Including an operation of receiving a downlink signal from the network in one of the cell-specific downlink subband and the terminal-specific downlink subband, A device characterized in that, when the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a physical downlink shared channel (PDSCH) scheduled by downlink control information (DCI), the device receives the downlink signal in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction from the network.

22. At least one computer readable medium (CRM) containing instructions based on being executed by at least one processor, An operation of receiving first configuration information for setting a cell-specific downlink subband from a network; An operation of receiving second configuration information for setting a terminal-specific downlink subband from the above network, and An operation of receiving a downlink signal from the network in one of the cell-specific downlink subband and the terminal-specific downlink subband is performed, A CRM characterized in that, when the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a physical downlink shared channel (PDSCH) scheduled by downlink control information (DCI), the downlink signal is received in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction from the network.

23. In the method, The base station transmits to the terminal first configuration information that sets a cell-specific downlink subband, The base station transmits second configuration information for setting a terminal-specific downlink subband to the terminal, and The base station transmits a downlink signal to the terminal in one of the cell-specific downlink subband and the terminal-specific downlink subband, A method characterized in that, when the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a physical downlink shared channel (PDSCH) scheduled by downlink control information (DCI), the downlink signal is transmitted in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction from the base station.

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, Transmit first configuration information for setting a cell-specific downlink subband to the terminal, Transmitting second configuration information for setting a terminal-specific downlink subband to the terminal, and Transmitting a downlink signal to the terminal in one of the cell-specific downlink subband and the terminal-specific downlink subband, A base station characterized in that, when the downlink signal is a channel state information reference signal (CSI-RS) or a signal through a physical downlink shared channel (PDSCH) scheduled by downlink control information (DCI), the base station transmits the downlink signal in one of the cell-specific downlink subband and the terminal-specific downlink subband based on an instruction of the base station.

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