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

Abstract

An operation method of a device in a wireless communication system, and the device are provided. The device receives first information for configuring periodic full duplex (FD) time resources, receives second information indicating non-FD time resources, and performs a transmission / reception operation on the basis of the first information and the second information. The second information is for switching some of the FD time resources to the non-FD time resources in units of a specific interval. The specific interval can be a time division duplex (TDD) cycle, which is provided by means of TDD configuration information, or a time interval equal to a multiple of the TDD cycle.

Description

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

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

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

[0003] NR can perform full duplex (FD) operation. When performing FD operation, downlink reception and uplink transmission can be performed simultaneously in a specific time resource, which is different from half duplex (HD) operation in which only either downlink reception or uplink transmission can be performed in a specific time resource. For FD operation, i) some frequency resources in the same time resource can be allocated as downlink subbands, and other some frequency resources can be allocated as uplink subbands, or ii) frequency resources that can be used for both downlink reception and uplink transmission in the same time resource can be allocated.

[0004] The former may be called subband-wise full duplex (hereinafter referred to as subband full duplex or SBFD), and the latter may be called spectrum-sharing full duplex (hereinafter referred to as SSFD).

[0005] When a network (or cell) operates in FD, for example, SBFD, the terminal is instructed with information about the time resources in which the network operates in SBFD, and can determine the SBFD operation time resources from this.

[0006] Meanwhile, the device may consider an operation of falling back some of the time resources operating in SBFD to non-SBFD time resources in order to increase the throughput of the downlink. That is, some of the time resources set as SBFD time resources may be switched to non-SBFD time resources so that the existing HD operation (or TDD operation) rather than the FD operation can be performed on the time resources.

[0007] The question may arise as to how to signal for this fallback behavior.

[0008] Additionally, in the case of the aforementioned fallback operation, transitions between SBFD time resources and non-SBFD time resources may occur more frequently than in the case where the fallback operation is not performed. This may result in problems such as increased operational complexity of the base station and terminal, and increased overhead due to the transition period.

[0009] The technical problem to be solved by the present disclosure is to provide a method of operating a device in a wireless communication system and a device using the method.

[0010] In one aspect, a method of operating a terminal in a wireless communication system is provided. The method comprises: receiving first information for setting periodic full duplex (FD) time resources, receiving second information indicating non-FD time resources, and performing a transmission and reception operation based on the first information and the second information, wherein the second information is information for switching some of the FD time resources to the non-FD time resources in units of a specific section, and wherein the specific section is a time section equal to a TDD period provided by TDD (time division duplex) setting information or a multiple of the TDD period.

[0011] In another aspect, a terminal, device, or computer-readable recording medium for executing the above method is provided.

[0012] In another aspect, a method of operating a base station in a wireless communication system and a base station using the operating method are provided.

[0013] A base station transmits first information for setting periodic full duplex (FD) time resources to a terminal, transmits second information for indicating non-FD time resources to the terminal, and communicates with the terminal based on the first information and the second information. The second information is information for switching some of the FD time resources to the non-FD time resources in units of a specific section, and the specific section is characterized in that it is a time section equal to a TDD period provided by TDD (time division duplex) setting information or a multiple of the TDD period.

[0014] According to the method according to the present disclosure, when a fallback operation is supported in which a time resource set as an SBFD resource is switched to a non-SBFD resource and used, the frequency of transitions between SBFD time resources and non-SBFD time resources can be reduced. Accordingly, an increase in operational complexity between devices can be prevented, and a decrease in throughput due to frequent transition intervals can also be prevented.

[0015] Figure 1 illustrates a wireless communication system to which the present disclosure can be applied.

[0016] Figure 2 is a block diagram showing a radio protocol architecture for a user plane.

[0017] Figure 3 is a block diagram showing the wireless protocol structure for the control plane.

[0018] Figure 4 illustrates the system architecture of a New Generation Radio Access Network (NG-RAN) to which NR is applied.

[0019] Figure 5 illustrates the functional division between NG-RAN and 5GC.

[0020] Figure 6 illustrates a frame structure that can be applied in NR.

[0021] Figure 7 illustrates a slot structure.

[0022] Figure 8 illustrates a core set.

[0023] Figure 9 illustrates an example of a frame structure for a new wireless access technology.

[0024] Figure 10 illustrates the structure of a self-contained slot.

[0025] Figure 11 illustrates physical channels and general signal transmission.

[0026] Figure 12 shows examples of how to apply full duplex within a carrier.

[0027] Figure 13 shows an example in which time resources operating in HD (half duplex) and time resources operating in FD (full duplex), such as SBFD or SSFD, coexist.

[0028] Figure 14 shows examples of a first time resource, a second time resource, a first frequency resource, and a second frequency resource.

[0029] Figure 15 illustrates another example of a first time resource, a second time resource, a first frequency resource, and a second frequency resource.

[0030] Figure 16 illustrates the TDD fallback operation.

[0031] Figure 17 shows an example of the configuration of SBFD-DCI.

[0032] Figure 18 illustrates SBFD symbols that are set / judged semi-statically.

[0033] Figure 19 shows examples in which some of the SBFD symbols existing within the period P are switched (converted) to non-SBFD symbols.

[0034] Fig. 20 is a method of switching some of the SBFD symbols into non-SBFD symbols according to proposed method 2.

[0035] Figure 21 illustrates an operation method of a terminal in a wireless communication system.

[0036] Fig. 22 shows an example of a base station and a terminal operating in a wireless communication system according to the method of Fig. 21.

[0037] Figure 23 illustrates a wireless device applicable to the present specification.

[0038] Figure 24 illustrates an example of a signal processing module structure.

[0039] Figure 25 illustrates another example of the structure of a signal processing module within a transmission device.

[0040] FIG. 26 illustrates an example of a wireless communication device according to an implementation example of the present disclosure.

[0041] Figure 27 shows an example of a processor (2000).

[0042] Figure 28 shows an example of a processor (3000).

[0043] Figure 29 illustrates another example of a wireless device.

[0044] Figure 30 illustrates another example of a wireless device to which the present specification applies.

[0045] Fig. 31 illustrates a communication system (1) applicable to this specification.

[0046] In this specification, “A or B” can mean “only A,” “only B,” or “both A and B.” In other words, “A or B” in this specification can be interpreted as “A and / or B.” For example, “A, B or C” in this specification can mean “only A,” “only B,” “only C,” or “any combination of A, B, and C.”

[0047] 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."

[0048] 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.”

[0049] 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.”

[0050] Additionally, parentheses used herein may mean “for example.” Specifically, when indicated as “control information (PDCCH),” “PDCCH” may be proposed as an example of “control information.” In other words, “control information” in this specification is not limited to “PDCCH,” and “PDCCH” may be proposed as an example of “control information.” Furthermore, even when indicated as “control information (i.e., PDCCH),” “PDCCH” may be proposed as an example of “control information.”

[0051] Technical features individually described in a single drawing in this specification may be implemented individually or simultaneously.

[0052] 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.

[0053] E-UTRAN includes a base station (BS) 20 that provides a control plane and a user plane to a user equipment (UE) 10. The UE 10 may be fixed or mobile, and may be referred to by other terms such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a wireless device, or a terminal. The base station (20) refers to a fixed station that communicates with the UE 10, and may be referred to by other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), or an access point.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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).

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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).

[0068] 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), i.e., the L1 / L2 control channel. A Transmission Time Interval (TTI) is a unit time for subframe transmission.

[0069] Below, we describe new radio access technology (new RAT, NR).

[0070] 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.

[0071] Figure 4 illustrates the system architecture of a New Generation Radio Access Network (NG-RAN) to which NR is applied.

[0072] 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 exemplifies a case including only gNBs. 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.

[0073] Figure 5 illustrates the functional division between NG-RAN and 5GC.

[0074] 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.

[0075] Figure 6 illustrates a frame structure that can be applied in NR.

[0076] 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).

[0077] Table 1 below illustrates the subcarrier spacing configuration μ (also referred to as subcarrier spacing configuration).

[0078] [Table 1]

[0079]

[0080] 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.

[0081] [Table 2]

[0082]

[0083] In Fig. 6, examples are given for μ=0, 1, 2, and 3.

[0084] 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.

[0085] [Table 2-1]

[0086]

[0087] 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.

[0088] Figure 7 illustrates a slot structure.

[0089] 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 (e.g., 5) BWPs. 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.

[0090] A PDCCH (physical downlink control channel) may be composed of one or more CCEs (control channel elements) as shown in Table 3 below.

[0091] [Table 3]

[0092]

[0093] That is, the PDCCH can be transmitted through a resource consisting of 1, 2, 4, 8, or 16 CCEs. Here, the CCEs are composed of 6 REGs (resource element groups), and one REG consists of one resource block in the frequency domain and one OFDM (orthogonal frequency division multiplexing) symbol in the time domain.

[0094] 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.

[0095] In NR, a new unit called a control resource set (CORESET) can be introduced. A terminal can receive PDCCHs in a CORESET.

[0096] Figure 8 illustrates a core set.

[0097] 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. NCORESET 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).

[0098] 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.

[0099] A terminal can be configured with multiple core sets.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] The following technologies / features can be applied in NR:

[0105] Self-contained subframe structure

[0106] Figure 9 illustrates an example of a frame structure for a new wireless access technology.

[0107] 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.

[0108] In Fig. 9, the hatched area represents a downlink control area, and the black area represents an uplink control area. Unmarked areas can be used for downlink data (DL data) transmission or uplink data (UL data) transmission. A characteristic of this structure is that downlink (DL) transmission and uplink (UL) transmission are sequentially performed within a single subframe, so that DL data can be sent and UL ACK / NACK (Acknowledgement / Not-acknowledgement) can also be received within the subframe. 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.

[0109] In these data and control TDMed subframe structures, 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 transition point from DL to UL in the self-contained subframe structure can be set as a guard period (GP).

[0110] Figure 10 illustrates the structure of a self-contained slot.

[0111] 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.

[0112] 1. DL only configuration

[0113] 2. UL only configuration

[0114] 3. Mixed UL-DL configuration

[0115] - DL area + GP (Guard Period) + UL control area

[0116] - DL control area + GP + UL area

[0117] DL area: (i) DL data area, (ii) DL control area + DL data area

[0118] UL domain: (i) UL data domain, (ii) UL data domain + UL control domain

[0119] 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.

[0120] Analog Beamforming #1

[0121] 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.

[0122] 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.

[0123] 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.

[0124] Analog Beamforming #2

[0125] 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.

[0126] 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.

[0127] 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.

[0128] In NR, multiple synchronization signal blocks can be transmitted at different times, and SSB can be used to perform initial access (IA), serving cell measurement, etc. Therefore, when the transmission timing and resources overlap with other signals, it is desirable to transmit SSB preferentially. To achieve this, the network can broadcast SSB transmission timing and resource information or indicate it through UE-specific RRC signaling.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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:

[0133] 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),

[0134] 2) PDCCH DM-RS scrambling sequence initialization value,

[0135] 3) Interval in the time domain of the core set (can be given in symbol units),

[0136] 4) A set of resource blocks,

[0137] 5) CCE-to-REG mapping parameters,

[0138] 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');

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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).

[0143] [Table 4]

[0144]

[0145] 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.

[0146] 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:

[0147] 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 or USS, etc.

[0148] 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.

[0149] Figure 11 illustrates physical channels and general signal transmission.

[0150] 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.

[0151] 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.

[0152] (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.

[0153] 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).

[0154] 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).

[0155] 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.

[0156] 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.

[0157] 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. That is, 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.

[0158] 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.

[0159] 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.

[0160] 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).

[0161] In this disclosure, the following are defined:

[0162] - AC(x): Access link between node(x) and terminal(s).

[0163] - BH(xy): Backhaul link between node(x) and node(y).

[0164] 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.

[0165] 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.

[0166] Technical features individually described in a single drawing in this specification may be implemented individually or simultaneously.

[0167] The following drawings are intended to illustrate specific examples of the present specification. The names of specific devices and the names of specific signals, messages, and fields depicted in the drawings are provided for illustrative purposes only, and the technical features of this specification are not limited to the specific names used in the drawings.

[0168] Now, we describe full duplex operation.

[0169] 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.

[0170] 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.

[0171] Figure 12 shows examples of how to apply full duplex within a carrier.

[0172] Referring to FIG. 12, in the full duplex method, subband-wise full duplex (hereinafter, referred to as subband full duplex or SBFD) as in (a) of FIG. 12 and spectrum-sharing full duplex (hereinafter, referred to as SSFD) as in (b) of FIG. 12 can be considered.

[0173] In the case of SBFD, DL and UL transmission and reception can be performed through different frequency resources within the same time resource within the same carrier (e.g., carrier #0). In other words, different frequency resources can be used for DL ​​and UL for the same time resource.

[0174] In the case of SSFD, transmission and reception of DL and UL can be performed through the same frequency resources or overlapping frequency resources in the same time resource within the same carrier (e.g., carrier #0). That is, the same or overlapping frequency resources can be used for DL ​​and UL for the same time resource.

[0175] 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.

[0176] Figure 13 shows examples where time resources operating in HD (half duplex) and time resources operating in FD (full duplex), such as SBFD or SSFD, coexist.

[0177] In (a) of Fig. 13, 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. 13, 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. That is, (a) and (b) of Fig. 13 can be interpreted as examples in which there are 5 slots or 5 symbols on the time axis.

[0178] 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).

[0179] 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 (which may be referred to as adjacent carrier interference (ACI)) from other adjacent carriers, some frequency resources at one or both ends of the carrier can be left unused for DL ​​and / or UL. That is, 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 only for DL ​​transmission.

[0180] In this disclosure, slot resources operating in half-duplex are referred to as HD slots, and slot resources operating in SBFD and SSFD are referred to as SBFD slots and SSFD slots, respectively. Additionally, SSFD slots and SSFD slots may be collectively referred to as FD slots.

[0181] 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.

[0182] In full-duplex operation, both the base station and the terminal can perform full-duplex operation. That is, both the base station and the terminal can simultaneously transmit and receive DL and UL using the same or different frequency resources in the same time resource.

[0183] 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.

[0184] The present disclosure assumes that the base station performs / supports full duplex operation, while the terminal performs / supports half duplex operation. However, the present disclosure can also be applied to cases where both the base station and the terminal perform / support full duplex operation.

[0185] Based on this discussion, the present disclosure proposes a method of operating by falling back to TDD in time resources operating in SBFD during intra-carrier full duplex operation.

[0186] In the following, the term "network" may be interpreted as a base station or CU / DU. Furthermore, the term "terminal (UE)" may be interpreted as a mobile terminal (MT) of an IAB node or an MT of a network-controlled repeater (NCR-MT).

[0187] A. Characteristics of DL / UL time / frequency resources for SBFD and SSFD operations

[0188] 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).

[0189] In the first time resource performing the HD operation, the DL operation or the UL operation is performed across the entire frequency resources that constitute the entire system bandwidth. Within the first time resource performing the HD operation, the network performs the DL operation through the 1-1 time resource and the UL operation 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.

[0190] In the second time resource performing the FD operation, the network performs the 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 the UL operation through all or part of the frequency resources (second frequency resources).

[0191] Figure 14 shows examples of a first time resource, a second time resource, a first frequency resource, and a second frequency resource.

[0192] Referring to (a) of FIG. 14, 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.

[0193] Referring to (b) of Fig. 14, 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.

[0194] Figure 15 illustrates another example of a first time resource, a second time resource, a first frequency resource, and a second frequency resource.

[0195] Referring to (a) of FIG. 15, in the first time resource (indicated by A), the device operates in half-duplex mode. In the second time resource (indicated by B), for example, it may operate in SSFD mode. 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.

[0196] Referring to (b) of Fig. 15, 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.

[0197] The first frequency resource and / or the second frequency resource may have all or some of the following characteristics:

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] The network can determine / judge the 'first time resource' and 'second time resource', and the 'first frequency resource' and 'second frequency resource' as described above, and provide all or part of the corresponding information to the terminal.

[0203] The terminal can determine information about time resources (hereinafter referred to as SBFD symbols) that operate as SBFD (and / or SSFD) for the FD (SBFD and / or SSFD) operation of the cell. For this purpose, information about SBFD symbols can be set to the terminal from the network.

[0204] 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.

[0205] 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, it may be considered to perform DL transmission not only on the DL subband but also outside the DL subband to improve DL throughput. In other words, it may be considered to perform DL transmission over the entire bandwidth.

[0206] That is, a fallback to TDD operation that performs DL or UL operation over the entire band, rather than SBFD operation over DL / UL subbands, can be considered for resources judged as SBFD symbols.

[0207] In resources not identified by the SBFD symbol, the terminal can perform TDD operation (half-duplex operation) like a conventional terminal. That is, it can perform only DL or UL operation using the entire frequency resources of the cell.

[0208] In the case of fallback operation, transitions between SBFD and non-SBFD time resources may occur more frequently than in the case of non-fallback operation. This may lead to increased operational complexity of the base station and terminal, as well as increased overhead due to the transition period.

[0209] In the present disclosure, a time resource operating in SBFD or an SBFD symbol may mean a 'second time resource'. In addition, in the present disclosure, a time resource operating in TDD, a time resource operating in HD, a TDD symbol, or an HD symbol may mean a 'first time resource'.

[0210] The DL subband mentioned in this disclosure may refer to the 'first frequency resource'. In addition, the UL subband mentioned in this disclosure may refer to the 'second frequency resource'.

[0211] The present disclosure assumes SBFD operation, where a cell performs DL and UL simultaneously using different frequency resources (e.g., subbands) in the same time resource. However, the contents of the present disclosure can also be applied to a cell performing SS-FD operation.

[0212] The present disclosure may include the following terminal operations.

[0213] When a terminal performs DL reception in an SBFD symbol, i) 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. ii) the terminal does not perform DL reception on frequency resources other than the DL subband. The terminal does not perform DL reception using frequency resources other than the DL subband within the DL BWP.

[0214] When a terminal performs UL transmission in an SBFD symbol, i) 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. ii) the terminal does not perform UL transmission on frequency resources other than the UL subband. The terminal does not perform UL transmission using frequency resources other than the UL subband within the UL BWP.

[0215] Typically, a UE can perform DL reception within a DL subband and UL transmission within a UL subband in the time resources where the UE determines that the cell operates in SBFD. However, if the gNB (base station) performs only DL transmission or UL reception in the time resources where the UE determines that the cell operates in SBFD, or if necessary, it may consider performing DL transmission or UL reception (capable of receiving DL or UL scheduling) over the entire band.

[0216] In existing NR TDD carriers, a base station performs only one operation, either downlink or uplink, in a specific time resource. In this case, the base station always operates in downlink in the time resource where SSB is transmitted.

[0217] For terminals operating in existing TDD, the following assumptions are made regarding the symbols in which SSB is transmitted.

[0218] 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).

[0219] 2) SS / PBCH transmission symbols cannot be set to uplink by SFI (slot format indication) of DCI format 2_0.

[0220] 3) When SS / PBCH is transmitted in a symbol configured as 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. For example, if the transmission of SRS overlaps with the SS / PBCH symbol in the flexible symbol, SRS transmission is not performed in the overlapped symbol(s).

[0221] Meanwhile, in FDR environments such as SBFD and SSFD, both DL and UL resources can exist within the same time frame from the cell (network, base station) perspective. Therefore, the base station can simultaneously transmit downlink and receive uplink data.

[0222] Therefore, even if SS / PBCH is transmitted in a time resource where the cell performs FDR operation, the base station can perform reception of uplink transmission of the terminal while transmitting SS / PBCH.

[0223] Meanwhile, according to the current standard specifications, a terminal cannot perform uplink transmission in symbol resources where SS / PBCH is transmitted by the network. In other words, a terminal cannot perform FDR operation in SS / PBCH transmission time resources.

[0224] When a specific time resource is set to operate as a SBFD time resource, both DL and UL resources exist in that time resource. At this time, 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 an SBFD resource, the base station's DL transmission occurs only within the DL subband. In other words, even if there is no UL signal transmitted by the terminal in the UL subband, DL transmission can only be performed within the DL subband.

[0225] Even if a specific time resource is determined to be an SBFD symbol, if there is no UL transmission from a terminal to be received by the base station, the base station may consider performing DL transmission not only on the DL subband but also outside the DL subband to improve DL throughput. In other words, performing DL transmission across the entire bandwidth may be considered.

[0226] In other words, it is possible to consider performing a fallback to TDD operation that performs DL or UL operation over the entire band, rather than SBFD operation over the DL / UL subband, in a resource determined as an SBFD symbol.

[0227] In the present disclosure, a time resource operating in SBFD or an SBFD symbol may mean a 'second time resource'. Additionally, in the present disclosure, a time resource operating in TDD, a time resource operating in HD, a TDD symbol, or an HD symbol may mean a 'first time resource'.

[0228] In consideration of this, the present disclosure describes a method of operating by falling back to TDD in time resources operating in SBFD during intra-carrier full duplex operation.

[0229] The present disclosure assumes SBFD operation, where a cell performs DL and UL simultaneously using different frequency resources (e.g., subbands) within the same time resource. However, the contents of the present disclosure can also be applied when a cell performs SSFD operation.

[0230] The base station may perform full duplex operation and the terminal may perform half duplex operation, or the base station may perform half duplex operation and the terminal may perform full duplex operation. Alternatively, both the base station and the terminal may support full duplex operation.

[0231] A terminal that knows that the base station can perform full duplex operation may be collectively referred to as an FD-aware terminal. A terminal that knows that the base station can perform subband non-overlapping full duplex (i.e., SBFD) operation may be collectively referred to as an SBFD-aware terminal. A terminal that knows that the base station can perform spectrum shared (or subband overlapping) full duplex (i.e., SSFD) operation may be referred to as an SSFD-aware terminal.

[0232] If a base station supports both half-duplex and full-duplex operations, it can inform the terminal of the resources (time or frequency, or both) that can (or are expected to) perform half-duplex and full-duplex.

[0233] If a base station is capable of SSFD operation, and in the case of a full-duplex base station, simultaneous UL reception is possible on some or all of the frequency resources available for DL ​​transmission at the base station. In other words, some frequency resources may allow for both DL transmission / reception and UL reception / transmission. In this case, in the case of SSFD, information about frequency resources that support SSFD can be communicated to the terminal. In addition, information about time resources that support SSFD can be communicated to the terminal.

[0234] For full duplex terminals, UL transmission may be possible simultaneously on some / all frequency resources available for DL ​​reception of the terminal.

[0235] The following description describes a method for indicating time( / frequency) resource information for performing SBFD, but this method can also be used to indicate time( / frequency) resources for performing SSFD when the base station is capable of half-duplex and SSFD operations.

[0236] In general, in a time resource where the cell is determined to operate in SBFD, the terminal can perform DL reception within the DL subband and UL transmission within the UL subband.

[0237] However, in the time resources where the cell is judged to operate in SBFD, if the base station performs only DL transmission or UL reception (or as needed), it may consider performing conventional TDD operation (capable of receiving DL or UL scheduling) over the entire band.

[0238] In the present disclosure, an operation is described in which a terminal performs DL transmission not only in a DL subband but also in a frequency resource other than a DL subband, and / or performs UL transmission not only in a UL subband but also in a frequency resource other than a UL subband, in a time resource determined to be operating in SBFD. Such an operation may be conveniently referred to as a TDD fallback operation (or simply a fallback operation) in the present disclosure.

[0239] Figure 16 illustrates the TDD fallback operation.

[0240] Referring to Fig. 16, for example, let's assume that the terminal determines slots #0, #4, #5, and #9 as TDD (HD) slots and slots #1, #2, #3, #6, #7, and #8 as SBFD slots based on configuration information. At this time, a TDD fallback operation that can perform DL reception (receive DL scheduling) over the entire band can be performed in a specific SBFD time resource (slot #6 in Fig. 16).

[0241] The above TDD fallback operation may specifically mean / include the following:

[0242] 1) Dynamic SBFD and TDD switching

[0243] A TDD fallback operation may refer to an operation of (dynamically) switching a time resource set to SBFD (semi-statically) to a TDD time resource. That is, a time resource set to SBFD may be set semi-statically, and switching the SBFD time resource to a TDD time resource may be dynamically indicated. For example, the SBFD time resource may be set repeatedly with a certain period. Some of these SBFD time resources may be switched to TDD time resources (or non-SBFD time resources) based on scheduling information such as DCI. In this case, the time resource performing TDD fallback may refer to a time resource that has been (dynamically) switched to a TDD time resource.

[0244] Alternatively, it may mean dynamically determining / judgement / changing whether to operate as SBFD or TDD for a specific time resource. That is, it may mean dynamically determining / judgement / changing a time resource that operates as SBFD and / or a time resource that operates as TDD (i.e., non-SBFD). In this case, indicating TDD fallback operation resource / information may mean (dynamically) indicating information on a time resource that operates as SBFD and / or a time resource that operates as TDD (i.e., non-SBFD).

[0245] 2) Permission to transmit DL in non-DL subbands (or UL subbands)

[0246] A TDD fallback operation may mean an operation that allows a terminal to perform DL reception not only on a DL subband frequency resource but also on a 'frequency resource other than a DL subband' (or on a 'UL and / or guard subband resource') for a time (semi-statically) set to SBFD. In this case, the time resource for performing TDD fallback may mean a time resource for performing DL reception by a terminal on a 'frequency resource other than a DL subband' (or on a 'UL and / or guard subband resource'). In other words, the time resource for performing TDD fallback may mean a time resource for performing DL reception by a terminal in all frequency bands.

[0247] 3) DL subband switching

[0248] TDD fallback operation may mean operating by changing the DL subband size and position to a wideband for a time set (semi-statically) to SBFD. Changing the DL subband size and position to a wideband may mean changing to the full bandwidth of the system BW or the full frequency resources within the DL BWP. In other words, the entire frequency resources within the system bandwidth may be considered DL subbands. In this case, since the DL subband is switched to the full bandwidth, the terminal can perform DL within the entire frequency resources. In this case, the time resource for performing TDD fallback may mean the time resource for operating by changing the DL subband size and position to a wideband.

[0249] 4) UL subband switching

[0250] TDD fallback operation may mean operating by changing the UL subband size to 0 for a time set (semi-statically) to SBFD. Changing the UL subband size to 0 may mean changing the entire bandwidth of the system BW (bandwidth) or the entire frequency resource within the DL BWP to a DL subband. In other words, the entire frequency resource within the system band may be determined as a DL subband. In this case, since the UL subband size is switched to 0, the terminal can perform DL within the entire frequency resource. In this case, the time resource for performing TDD fallback may mean the time resource for operating by changing the UL subband size to 0.

[0251] A terminal can determine, for a specific time resource, whether the time resource is used for SBFD operation or TDD operation, either explicitly by base station configuration or implicit determination.

[0252] At this time, in order to support the TDD fallback operation for the time resource determined to additionally perform the SBFD operation, the time resource for the terminal to perform the TDD fallback operation can be determined as follows.

[0253] In a cell performing SBFD operation, specific time resources (e.g., symbol(s), slot(s)) can be used for either SBFD operation or non-SBFD (i.e., legacy TDD) operation. In a symbol where the cell is determined to be operating in SBFD, the terminal can operate as follows.

[0254] 1) Transmission of UL signals / channels can be performed within the frequency resources set / determined as UL subbands. And / or transmission of UL signals / channels is not performed outside the frequency resources set / determined as UL subbands.

[0255] 2) Reception of DL signals / channels can be performed within the frequency resources set / determined as DL subbands. And / or reception of DL signals / channels is not performed outside the frequency resources set / determined as DL subbands.

[0256] 3) Transmission of UL signals / channels is not performed within the frequency resources set / determined as guard subbands. And / or transmission of DL signals / channels is not performed within the frequency resources set / determined as guard subbands.

[0257] Whether a cell operates in SBFD / non-SBFD mode for a specific time resource can be dynamically indicated to the terminal from the network via DCI. To this end, the terminal can dynamically receive information about the cell's SBFD / non-SBFD operation for a specific time resource(s) from the network via DCI signaling.

[0258] In the present disclosure, for convenience of explanation, DCI in which SBFD / non-SBFD information is transmitted as described above may be referred to as SBFD-DCI.

[0259] A. Reception of SBFD-DCI

[0260] Below, the configuration method of SBFD-DCI and the operation of a terminal for receiving SBFD-DCI are described.

[0261] Approach 1. SBFD-DCI may refer to scheduling DCI (i.e., DL grant, UL grant) transmitted for scheduling PDSCH / PUSCH, etc. In this case, information regarding whether a cell operates in SBFD / non-SBFD mode for specific time resource(s) may be included and transmitted within the scheduling DCI.

[0262] In this case, the terminal can be instructed on SBFD / non-SBFD operation information of the cell applied to the transmission time resource of the PDSCH / PUSCH scheduled through the corresponding DCI (e.g., the time resource indicated by the TDRA field in the DCI).

[0263] The terminal may be instructed about the SBFD / non-SBFD operation information of the cell in these time resources either through a specific explicit field in the scheduling DCI or implicitly through an existing field.

[0264] For example, a 1-bit field may be added within the scheduling DCI, which may be used to indicate SBFD or non-SBFD operation of the cell. For example, if the UE is instructed by the field within a specific scheduling DCI that the cell performs non-SBFD operation, the UE determines that the time resource(s) on which the PDSCH / PUSCH scheduled by the corresponding scheduling DCI is transmitted are operating in non-SBFD.

[0265] Additionally / independently, the terminal may be instructed of SBFD / non-SBFD operation information of the cell for the transmission time resource(s) of the PUCCH scheduled through the corresponding DCI (i.e., the PUCCH transmitted after receiving the PDSCH scheduled through the corresponding DCI and including ACK / NACK information for the reception of the corresponding PDSCH).

[0266] The terminal may be instructed about the SBFD / non-SBFD operation information of the cell in these time resources either through a specific explicit field in the scheduling DCI or implicitly through an existing field.

[0267] For example, a 1-bit field may be added within the scheduling DCI, which may be used to indicate whether the cell will operate in SBFD or non-SBFD mode. In this case, for example, if the UE is instructed by the field within a specific scheduling DCI that the cell will operate in non-SBFD mode, the UE determines that the time resource(s) on which the PUCCH scheduled by the scheduling DCI is transmitted are operating in non-SBFD mode.

[0268] The same indication information via scheduling DCI can simultaneously indicate information about PDSCH transmission resources and PUCCH transmission resources. If a UE receives cell SBFD / non-SBFD operation information through a specific explicit field within scheduling DCI or implicitly through an existing field, it can determine that the operation information applies equally to the transmission time resources of the PDSCH scheduled by the DCI and the transmission time resources of the PUCCH scheduled by the DCI.

[0269] When using this approach, the UE only needs to receive information on whether the cell is in dynamic SBFD / non-SBFD operation for the time resources when it actually transmits / receives signals / channels such as PDSCH, PUSCH, and PUCCH, without having to receive information on whether the cell is in dynamic SBFD / non-SBFD operation every time for each resource. Therefore, there is an advantage in that the overhead of DCI reception is reduced. In addition, since the information on whether the cell is in dynamic SBFD / non-SBFD operation is received through the existing scheduling DCI, there is an advantage in that the overhead of designing a separate DCI format and receiving additional DCI is reduced.

[0270] Approach 2. SBFD-DCI can be UE specific and / or UE group specific DCI independent of scheduling DCI.

[0271] Approach 2-1. SBFD-DCI is a terminal group-specific DCI. DCI Format 2-0, previously used for slot format indication, can be used. In this case, information regarding whether a cell operates in SBFD / non-SBFD mode for specific time resources can be included and transmitted within DCI Format 2-0.

[0272] For this purpose, field(s) may be added to the existing DCI format 2-0 to indicate whether the cell operates in SBFD / non-SBFD mode for specific time resource(s). If the relevant setting for indicating the cell's SBFD / non-SBFD operation information in DCI is set by a higher layer parameter, the terminal may determine that such field(s) exist in the DCI format 2-0.

[0273] Approach 2-2. SBFD-DCI may be a new dedicated DCI format for indicating whether a cell operates in SBFD / non-SBFD mode for a specific time resource(s). This DCI format may be transmitted CRC-scrambled with a dedicated RNTI (e.g., SBFD-RNTI) different from the C-RNTI. The UE may receive the value of the dedicated RNTI used for receiving SBFD-DCI from the network via higher-layer signaling.

[0274] When using this approach, multiple terminals can receive information about whether a cell is in dynamic SBFD / non-SBFD operation by receiving the same SBFD-DCI. Since the SBFD / non-SBFD operation information of a specific cell for a specific time resource is cell-specific information, terminals receive the same information for the same time resource. Therefore, when using this approach, there is an advantage of reducing signaling overhead because the terminals receive the SBFD / non-SBFD operation information of the cell through different or the same fields within the same DCI, rather than transmitting the SBFD / non-SBFD operation information independently for each terminal.

[0275] B. Method of indicating dynamic SBFD / non-SBFD information through SBFD-DCI

[0276] This section describes how to dynamically indicate to UEs the SBFD / non-SBFD operation information of a cell for a specific time resource via SBFD-DCI.

[0277] Approach B-1. How to indicate SBFD / non-SBFD operation information by unit time resource.

[0278] A terminal can receive SBFD / non-SBFD operation information for each time resource from the network. If there are N time resources, SBFD / non-SBFD operation information is indicated for each time resource, and thus, a total of N SBFD / non-SBFD operation information can be indicated. For example, the SBFD / non-SBFD operation information can be indicated as 1-bit information, and can be indicated as 0 when operating as SBFD and 1 when operating as non-SBFD. In this case, for example, the SBFD / non-SBFD operation information for N time resources can be a bitmap consisting of N bits. The terminal can determine whether a cell operates as SBFD or non-SBFD in the corresponding time resource based on whether the bit value corresponding to each time resource is 0 or 1 through the bitmap information.

[0279] [Composition B-1-1] At this time, each time resource can be configured as follows.

[0280] Alt 1. A time resource consists of one slot. When information about N time resources is indicated, the N time resources can mean N consecutive or non-consecutive slots.

[0281] For example, N time resources may mean N slots set to SBFD. That is, N time resources starting from a specific slot may mean N SBFD slots sequentially excluding non-SBFD slot(s) starting from the specific slot.

[0282] Alt 2. A single time resource consists of a plurality of (K) consecutive slots or consecutive symbols. When information about N time resources is indicated, the N time resources may consist of N consecutive or non-consecutive time resources. In this case, each time resource may consist of K consecutive slots or symbols.

[0283] At this time, the value of K can be defined as a fixed value in the standard specification. Alternatively, the terminal can receive the value of K from the network through upper layer signaling.

[0284] Alt 3. The slots / symbol resources that constitute a single time resource can be configured from the network. That is, information about the slot / symbol resources that constitute each time resource can be configured from the base station to the terminal.

[0285] For example, when a time resource is composed of consecutive slots / symbols, the terminal can receive information about the start slot (or symbol) and slot interval (or symbol interval) of each time resource from the network. From this, the terminal can determine that the time resource is composed of the slot interval (or symbol interval) starting from the position of the configured slot (or symbol). At this time, the slot interval (or symbol interval) can include only slots / symbols set to SBFD. That is, L slot / symbol intervals starting from a specific slot / symbol can mean L SBFD slots / symbols sequentially excluding non-SBFD slot(s).

[0286] When instructed to provide information on N time resources, the terminal can receive information on slot / symbol resources that constitute each of the N time resources from the network.

[0287] A terminal can be instructed on SBFD / non-SBFD operation information for N time resources through a specific field in SBFD-DCI. This field can consist of N bits.

[0288] More specifically, the terminal sends N through the dth field among the D fields that constitute SBFD-DCI. d SBFD / non-SBFD operation information for the time resource of the dog can be instructed. These fields are N dIt can be made up of dog bits.

[0289] Figure 17 shows an example of the configuration of SBFD-DCI.

[0290] Referring to Figure 17, there may be, for example, D fields within one SBFD-DCI.

[0291] The length of the dth field in SBFD-DCI is N d is the same. At this time, for d = 0, 1, …, D-1, N d The values ​​of can all be equal to N.

[0292] or N d The value of can be independent of the value of d.

[0293] The starting bit location of the dth field in SBFD-DCI is S d That is, the terminal sets the bit position where the dth field starts in SBFD-DCI to S d I judge it to be the same.

[0294] At this time, for d = 0, 1, …, D-1, N d If all values ​​of S are equal to N, d The value of can be equal to N*d or N d The value of can be independent of the value of d.

[0295] [Configuration B-1-2] The terminal can receive only one DCI field within SBFD-DCI and receive SBFD / non-SBFD operation information for each time resource through this. In order to determine the position of the field received by the terminal among multiple fields within the DCI, when the terminal receives the d-th field within the SBFD-DCI, the terminal needs to know the position and length information of the d-th field within the DCI. To this end, the terminal can receive information about the field it receives within the SBFD-DCI from the network.

[0296] The terminal receives N, the length of the dth field in SBFD-DCI from the network. d The value of can be set or determined. In this case, the terminal sets the length of the d-th field to N d I judge it to be the same.

[0297] The terminal sets the length value of the field it receives in SBFD-DCI, N d The value can be set from the network through upper layer signaling.

[0298] Alternatively, if the terminal receives the number of time resources for which it is instructed to receive SBFD / non-SBFD operation information from the network through SBFD-DCI, the value is set to N, which is the length of the field in the DCI that the terminal receives. d I judge it to be the same.

[0299] The terminal receives S, which is the starting bit position of the dth field in SBFD-DCI from the network. d The value can be set or determined. In this case, the terminal starts at the bit position where the d-th field begins. d I judge it to be the same.

[0300] The terminal sets the S bit position value of the field it receives in SBFD-DCI. d The value can be set from the network through upper layer signaling.

[0301] With the above information, the terminal can access S within the DCI. d From the Nth bit d It can be determined that the bits of the dog constitute the d-th field that the terminal receives within the SBFD-DCI.

[0302] The terminal can receive multiple DCI fields in SBFD-DCI and receive SBFD / non-SBFD operation information by time resource through these fields. When the terminal receives A fields in SBFD-DCI, the terminal needs to know the location and length information of each field in the DCI. To this end, the terminal can receive information about the fields it receives in SBFD-DCI from the network. For example, the terminal can receive the length value and the start bit position value of each field for A fields. For example, when the terminal receives two DCI fields, in order to determine the location of the d1-th field in SBFD-DCI, the length of the d1-th field, N d1 S, the starting bit position of the d1th field d1 To set the value and determine the position of the d2th field, N is the length of the d2th field. d2 , S, which is the starting bit position of the d2nd field d2 The value can be set.

[0303] When a terminal receives multiple DCI fields within a single SBFD-DCI, each DCI field can indicate SBFD / non-SBFD operation information for independent / different time resources. That is, when a terminal receives the d1 and d2 DCI fields, N d1 The SBFD / non-SBFD operation information for each time resource for the time resource is indicated from the d1 field, and the other N d2 The SBFD / non-SBFD operation information for each time resource can be indicated from the d2 field.

[0304] The terminal can use the above method to determine the field(s) it receives within SBFD-DCI and receive SBFD / non-SBFD operation information for each time resource through the field(s).

[0305] An example of the operation of the terminal proposed in the above approach B-1 is as follows.

[0306] The terminal receives SBFD-DCI from the network and, through a specific field in the SBFD-DCI, identifies the N associated with that field. d For each of the dog time resources, the cell receives and determines whether it is operating in SBFD or non-SBFD mode (i.e., information about the operating mode).

[0307] The fields in the SBFD-DCI received by the terminal are N d It can be composed of N bits. d In the bits of the dog, each bit is in order N d Each of the time resources can be instructed to operate in either SBFD or non-SBFD mode. For example, if the nth bit is 0, it can mean that the cell operates in SBFD mode in the nth time resource, and if the nth bit is 1, it can mean that the cell operates in non-SBFD mode in the nth time resource (and vice versa).

[0308] N d The time resources of the dog can be N time resources from a specific slot, which can be configured as in [Configuration B-1-1] above. For example, N d A time resource of a dog may mean N SBFD slots sequentially excluding non-SBFD slot(s) from a specific slot.

[0309] The terminal is S within SBFD-DCI d From the Nth bit d The bits of the dog can be judged as the bits that constitute the field received by the terminal. For this purpose, the terminal S d and / or N d The value can be received from the network through upper layer signaling.

[0310] The above Approach B-1 method has the advantage of being able to indicate information about all time resources using a small number of bits when a large number of time resources exist. For example, if there are 16 time resources, 4*8 bits are required to indicate the ID (identity) values ​​of 8 time resources that operate in non-SBFD mode. On the other hand, if the SBFD / non-SBFD operation information for each time resource is indicated in bitmap format, 16 bits can be used, which has the advantage in terms of overhead when a large number of time resources need to be indicated.

[0311] Approach B-2. How to indicate time resource information that operates non-SBFD (or SBFD).

[0312] A terminal can be instructed by the network about the time resource(s) on which the cell operates in non-SBFD mode (or in SBFD mode). To this end, the terminal can receive information about the time resource(s) on which the cell operates in non-SBFD mode by receiving SBFD-DCI. The terminal can determine that the cell operates in non-SBFD mode based on the instructed time resource(s).

[0313] [Configuration B-2-1] At this time, the terminal can be instructed as follows about the time resource(s) in which the cell operates as non-SBFD through a specific field in SBFD-DCI.

[0314] Alt 1. Through a specific field, a terminal can receive an ID (i.e., a time resource ID) indicating a specific time resource. In this case, information about the corresponding time resource exists for each ID.

[0315] The terminal can receive information about an ID corresponding to a time resource and / or information about the configuration of a time resource corresponding to the ID through upper layer signaling from the network.

[0316] At this time, one time resource can be configured as follows:

[0317] Alt 1-1. A single time resource consists of a single slot. In this case, information about the slot offset corresponding to the position of the time resource from the reference position can be set to define the time resource.

[0318] Alt 1-2. A single time resource consists of multiple (K) consecutive slots or consecutive symbols. The value of K can be defined as a fixed value in the standard. Alternatively, the terminal can receive the value of K from the network via upper-layer signaling. In this case, information about the slot offset corresponding to the position of the corresponding time resource from the reference position can be set to define a specific time resource. Since a single time resource consists of K consecutive slots or consecutive symbols, the slot offset can be limited to a multiple of K.

[0319] Alt 1-3. Information about slot / symbol resources that constitute one time resource can be set from the base station to the terminal.

[0320] For example, when a time resource is composed of consecutive slots / symbols, the terminal can receive information about the start slot (or start symbol) and slot interval (or symbol interval) of each time resource from the network. From this, the terminal can determine that the time interval corresponding to the slot interval (or symbol interval) from the position of the configured slot (or symbol) constitutes the time resource. At this time, the slot interval (or symbol interval) can include only slots / symbols set to SBFD. That is, L slot / symbol intervals starting from a specific slot / symbol can mean L SBFD slots / symbols sequentially excluding non-SBFD slot(s).

[0321] Alt 2. Through a specific field, the terminal can receive an ID (i.e., a time resource combination ID) indicating a set / combination of one or more time resources. In this case, information about the corresponding set / combination of time resources may be available for each ID.

[0322] A single time resource combination ID may be linked to multiple time resource IDs. That is, the IDs of time resources belonging to each combination may be set for each time resource combination ID. In this case, each time resource may be configured as, for example, Alt 1-1, 1-2, or 1-3 of the above Alt 1.

[0323] Alt 3. Through a specific field, the terminal can be instructed about the slot / symbol resources that constitute a specific time resource.

[0324] In this case, the terminal can be instructed of values ​​corresponding to the start slot and slot interval through specific fields within SBFD-DCI.

[0325] For example, a value corresponding to a start slot (a value corresponding to a slot offset from a base slot) can be indicated through a specific field within SBFD-DCI, and a value corresponding to a slot interval can be indicated through another field. As described above, the terminal can determine that the cell operates in non-SBFD mode in the time resource(s) indicated through SBFD-DCI.

[0326] [Configuration B-2-2] A terminal can receive a single DCI field within SBFD-DCI and be instructed of a time resource set / combination for the cell to operate in non-SBFD mode. In order to determine the position of a field received by the terminal among multiple fields within the DCI, when the terminal receives the d-th field within the SBFD-DCI, the terminal needs to know the position and length information of the d-th field within the DCI. To this end, the terminal can receive information about the field it receives within the SBFD-DCI from the network.

[0327] The terminal receives N, the length of the dth field in SBFD-DCI from the network. d The value of can be set or determined. In this case, the terminal sets the length of the d-th field to N d I judge it to be the same.

[0328] The terminal sets the length value of the field it receives in SBFD-DCI, N d The value can be set from the network through upper layer signaling.

[0329] Or, when the number of time resources or time resource sets / combinations that the terminal can be instructed to receive from the network through a specific field in the SBFD-DCI (i.e., the number of time resources or time resource sets / combinations for which the cell set by the terminal operates as non-SBFD, such as in [Configuration B-2-1] above) is called 'N_resource', the terminal can receive N d The value of is determined to be equal to log2(N_resource) or log2ceil(N_resource). Ceil(x) is a function that returns the smallest integer value that is bigger than or equal to x.

[0330] The terminal receives S, which is the starting bit position of the dth field in SBFD-DCI from the network.d The value can be set or determined. In this case, the terminal determines that the bit position where the d-th field begins is S d I judge it to be the same.

[0331] Alternatively, the terminal receives a d value indicating the order of fields received by the terminal from the network through upper layer signaling from the network. In this case, the terminal receives S d The value is d*N d It is judged to be the same as or the terminal is S d The value is judged to be equal to d·log2(N_resource) or d·log2ceil(N_resource).

[0332] A terminal can be instructed of multiple time resources for which a cell operates in non-SBFD mode through multiple fields in SBFD-DCI. For example, a cell can receive N fields to be instructed of N time resources or N time resource sets / combinations for which the cell operates in non-SBFD mode, and one time resource set / combination can be instructed through each field. In this case, the terminal can be instructed of a time resource set / combination for which the cell operates in non-SBFD mode through each field, as in [Configuration B-2-1] above.

[0333] To this end, the terminal can set information about the fields it receives within SBFD-DCI from the network. The terminal can set the length value and the start bit position value of each field for A fields. For example, if the terminal receives two DCI fields, to determine the position of the d1-th field within SBFD-DCI, the length of the d1-th field, N d1 S, the starting bit position of the d1th field d1 To set the value and determine the position of the d2th field, N is the length of the d2th field. d2 , S, which is the starting bit position of the d2nd field d2 The value can be set.

[0334] The terminal can use the above method to determine the field(s) it receives within SBFD-DCI and, through the field(s), can be instructed of information on the time resource(s) in which the cell operates in non-SBFD.

[0335] An example of the operation of the terminal proposed in the above approach B-2 is as follows.

[0336] The terminal receives SBFD-DCI from the network, receives information about time resource(s) indicated in a specific field within the SBFD-DCI, and determines that the cell operates non-SBFD for the time resource(s).

[0337] The fields in the SBFD-DCI received by the terminal are N d It consists of bits, and these bits indicate the ID of the time resource combination.

[0338] The terminal receives multiple (N_resource) time resource combinations from the network. A time resource combination corresponding to a specific ID consists of multiple time resources, and the terminal receives the IDs of the time resources constituting each time resource combination from the network. The terminal also receives slot / symbol information constituting the time resources corresponding to each ID from the network.

[0339] The terminal is S within SBFD-DCI d From the Nth bit d The bits of the dog are judged as bits that constitute the field received by the terminal. For this purpose, the terminal determines the S d The value of is received (set) from the network through upper layer signaling. The terminal is N d It is determined that the value is equal to log2(N_resource) or log2ceil(N_resource).

[0340] The above instructions via SBFD-DCI can only be applied to symbol / slot resources for which the terminal has been semi-statically instructed by the network that the cell will operate in SBFD.

[0341] Although the content of the above disclosure describes / proposes a TDD fallback operation from a DL scheduling perspective, the content and concept of the present disclosure can also be applied to a TDD fallback operation from a UL scheduling perspective.

[0342] Below, a dynamic indication method of SBFD symbols is described to minimize the transition point between SBFD symbols and non-SBFD symbols when applying dynamic SBFD.

[0343] The base station may perform full duplex operation and the terminal may perform half duplex operation, or the base station may perform half duplex operation and the terminal may perform full duplex operation. Alternatively, both the base station and the terminal may support full duplex operation.

[0344] A terminal that knows that the base station can perform full-duplex operation may be referred to as an FD-aware terminal. A terminal that knows that the base station can perform subband non-overlapping full-duplex (i.e., SBFD) operation may be referred to as an SBFD-aware terminal. A terminal that knows that the base station can perform spectrum sharing (or subband overlapping) full-duplex (i.e., SSFD) operation may be referred to as an SSFD-aware terminal.

[0345] If a base station supports both half-duplex and full-duplex operation, it may inform the terminal of the time or frequency, or both, at which it can perform half-duplex and full-duplex (or is expected to perform or intends to perform the resource).

[0346] When a base station is capable of SSFD operation, for a full-duplex base station, UL reception may be possible simultaneously on some or all frequency resources available for DL ​​transmission at the base station. In other words, some frequency resources may allow for UL reception / transmission as well as DL transmission / reception. In this case, in the case of SSFD, information about frequency resources available for SSFD may be communicated to the terminal. In addition, information about time resources available for SSFD may be communicated to the terminal.

[0347] In the case of a full-duplex terminal, UL transmission may be possible simultaneously on some or all frequency resources in the frequency resources where the terminal can receive DL. In the present disclosure, a terminal performing half-duplex operation is referred to as an HD terminal, and a terminal capable of performing or performing full-duplex operation is referred to as an FD terminal.

[0348] When a base station performs full duplex operation such as SBFD or SSFD, it may perform SSFD and / or SBFD operation only for some time / frequency resources. In the case of SBFD-aware terminals and / or SSFD-aware terminals, if the cell knows the time / frequency resources on which the cell performs SSFD and / or SBFD operation, the cell may perform the operation of the terminal differently depending on the resource on which the cell operates in half duplex (HD), the resource on which the cell operates in SBFD, or the resource on which the cell operates in SSFD. For example, the terminal may perform transmission and reception by differently determining the time / frequency resource on which it performs reception of a DL signal / channel and / or transmission of a UL signal / channel as an HD resource, an SBFD resource, or an SSFD resource.

[0349] In the present disclosure, a method is described in which a terminal receives information for determining a time / frequency resource for performing full duplex from a base station, and a cell determines a time / frequency resource for performing full duplex from the information.

[0350] Through the contents of this disclosure, the base station and terminal can operate as follows.

[0351] The base station may 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 time resources operating in HD, and may perform a full-duplex operation in which DL transmission is performed through the first frequency resource (i.e., DL subband resource) within the frequency resources constituting the cell and UL reception is simultaneously performed through the second frequency resource (i.e., UL subband resource) within the frequency resources constituting the cell in the time resources operating in SBFD and SSFD.

[0352] To this end, the base station determines / determines time resources corresponding to the first time resource (i.e., HD symbol) and the second time resource (i.e., FD symbol) and transmits configuration information regarding the first time resource (i.e., HD symbol) and / or the second time resource (i.e., FD symbol) to the terminal. The FD symbol may include both the SBFD symbol and the SSFD symbol. More specifically, the base station determines / determines time resources corresponding to the HD symbol, the SBFD symbol, and / or the SSFD symbol, and transmits configuration information regarding the HD symbol, the SBFD symbol, and / or the SSFD symbol to the terminal.

[0353] At this time, the DL subband resources and / or UL subband resources may be configured differently in the time resources operating in SBFD and in the time resources operating in SSFD. In the time resources operating in SBFD, the DL subband resources and UL subband resources are configured so as not to overlap each other. In the time resources operating in SSFD, the DL subband resources and UL subband resources may be configured so as to overlap each other. The DL subband / UL subband resources may be configured with all frequency resources as well as some frequency resources of the system band.

[0354] The terminal receives configuration information about an HD symbol, an SBFD symbol, and / or an SSFD symbol from the network, and determines the positions of the HD symbol, the SBFD symbol, and / or the SSFD symbol. At this time, the terminal performs DL reception (UL transmission) through the entire frequency resources for which the terminal is configured to operate DL reception (UL transmission) in the HD symbol, and performs DL reception (UL transmission) through DL subband (UL subband) resources that are the same as or limited to the frequency resources for which the terminal performs DL reception (UL transmission) in the HD symbol in the SBFD symbol and / or SSFD symbol. In this case, even if the terminal is configured to perform DL reception (UL transmission) in a frequency resource that does not correspond to a DL subband resource (UL subband resource) in the SBFD symbol and / or SSFD symbol resource, the terminal does not perform DL reception (UL transmission) in a frequency resource that does not correspond to a DL subband resource (UL subband resource).

[0355] Below, we describe the evolution of duplex operation.

[0356] 1. SBFD operations.

[0357] For SBFD operation within a TDD carrier, an SBFD subband may be composed of one resource block (RB) or a set of contiguous RBs for the same transmission direction. An SBFD symbol may be defined as a symbol that includes a subband that the base station will use for SBFD operation.

[0358] The maximum number of UL subbands for SBFD operation in SBFD symbols (excluding legacy UL symbols) within a TDD carrier can be one. These UL subbands can be located on either side of the carrier or in the middle of the carrier.

[0359] Whether SBFD operation is supported in SSB symbols may be an issue. UL subbands may be configured in SSB symbols. If SBFD-aware terminals are not allowed to transmit in SSB symbols but are allowed to receive within the DL BWP of the SSB symbol, negative impacts on SSB detection and measurement may be avoided, but uplink performance may be degraded due to reduced uplink transmission opportunities. If SBFD-aware terminals are allowed to transmit in SSB symbols, the terminals may perform uplink transmission only on the uplink subbands according to the scheduling and configuration of the base station, the terminal's measurement, or the priority rules. If an SBFD-aware terminal is requested to transmit in an SSB symbol, SSB detection and measurement may be negatively affected.

[0360] Another issue may be whether a slot can consist of both SBFD and non-SBFD symbols. One motivation for allowing a slot to consist of both SBFD and non-SBFD symbols is compatibility with symbol-level TDD UL / DL configurations.

[0361] However, frequent transitions between SBFD and non-SBFD symbols increase implementation complexity and may result in transmission and reception interruptions during such transitions. At least for semi-static SBFD, a potential limit on the maximum number of transition points between SBFD and non-SBFD symbols could be considered from the perspective of SBFD subband configuration to avoid frequent transitions between SBFD and non-SBFD symbols.

[0362] Within a TDD UL / DL pattern period, at most two transition points can be considered: one transition point from a non-SBFD symbol to an SBFD symbol and one transition point from an SBFD symbol to a non-SBFD symbol. A guard period between an SBFD symbol and a non-SBFD symbol may or may not be required at the base station and / or terminal side, depending on the base station / terminal implementation and / or SBFD operation.

[0363] The time and frequency locations of subbands within a TDD carrier are not fixed in the standard. The base station may consider the following options regarding whether to inform the UE of the time and / or frequency locations of the subbands to be used for SBFD operation. At least in the RRC_CONNECTED state, option 4 below may be given priority.

[0364] 1) SBFD operation option 1.

[0365] The time and frequency locations of subbands for SBFD operation are unknown to the terminal. Terminal operation can follow existing standards without introducing new terminal operations for SBFD operation on the base station side.

[0366] 2) SBFD operation option 2.

[0367] The time and frequency locations of subbands for SBFD operation are unknown to the terminal. Non-SBFD-aware terminals follow existing specifications. From a RAN1 perspective, new terminal operations may be introduced for SBFD-aware terminals.

[0368] 3) SBFD operation option 3.

[0369] Only the time positions of the subbands for SBFD operation are known to SBFD-aware terminals. Non-SBFD-aware terminals follow existing specifications for terminal operation. From a RAN1 perspective, new terminal operations for SBFD-aware terminals can be introduced based on the time positions of the subbands for SBFD operation.

[0370] 4) SBFD operation option 4.

[0371] Both the time and frequency locations of the subbands for SBFD operation are known to SBFD-aware terminals. Non-SBFD-aware terminals follow existing specifications. From a RAN1 perspective, new terminal operations for SBFD-aware terminals can be introduced based on the time and frequency locations of the subbands for SBFD operation.

[0372] Among the above four options, SBFD operation option 4 is used as SBFD operation at least in the RRC_CONNECTED state.

[0373] Random access in SBFD symbols can be problematic. Allowing random access in SBFD symbols for SBFD-aware UEs can potentially reduce random access latency, reduce PRACH collision probability, and improve PRACH and Message 3 coverage. Transmission of PRACH and Message 3 in the UL subband of the SBFD symbol can cause cross-link interference (CLI) between UEs. Random access in SBFD symbols may be allowed for PRACH and Message 3 transmission in symbols configured as downlink in TDD-UL-DL-ConfigCommon.

[0374] <SBFD 서브밴드의 반정적 설정>

[0375] For the subband position indication for SBFD operation, the subband time and frequency positions can be set semi-statically. In the case of semi-static setting of the time positions of the subbands for SBFD operation, the time positions of the SBFD subbands can be explicitly set within a period.

[0376] For semi-static configuration of the frequency positions of subbands for SBFD operation, explicit indication of the frequency positions of at least the UL subbands may be required. For semi-static SBFD, the frequency positions of the DL subbands and guard bands (if any) may be configured by one of the following two options:

[0377] Option 1: The frequency locations of DL subbands can be explicitly set. Guard bands (if any) can be implicitly derived as resource blocks that do not belong to UL or DL ​​subbands.

[0378] Option 2: The number of resource blocks for the guard band (if any) can be explicitly set. DL subbands can be implicitly derived as resource blocks that do not belong to the UL subbands or guard bands.

[0379] In the case of semi-static SBFD, an SBFD-aware terminal does not transmit UL channels / signals or receive DL channels / signals in the guard bands that the terminal recognizes.

[0380] For semi-static configuration of subband frequency locations for SBFD operation, the frequency locations of UL / DL subbands can refer to the common resource block (CRB) grid. For semi-static configuration of subband locations, the same subband frequency resources can be configured in different SBFD symbols.

[0381] <TDD-UL-DL-ConfigCommon에서 하향링크로 설정된 심볼에서의 SBFD 동작>

[0382] In the SBFD symbol configured as downlink in TDD-UL-DL-ConfigCommon, for an SBFD-aware terminal with an uplink subband semi-statically configured, uplink transmission within the uplink subband is allowed in the SBFD symbol. Uplink transmission outside the uplink subband is not allowed in the SBFD symbol. The frequency location of the downlink subband is known to the SBFD-aware terminal. The frequency location of the downlink subband can be explicitly indicated or implicitly derived. Downlink reception within the downlink subband is allowed in the SBFD symbol. The uplink transmission is within an active UL BWP, and the downlink reception is within an active DL BWP.

[0383] For SBFD-aware terminals, it may be questionable whether downlink reception outside of the semi-statically configured downlink subband is permitted in symbols configured as downlink by TDD-UL-DL-ConfigCommon. One of the following options may be considered:

[0384] Option 1 (Semi-static SBFD): Downlink reception outside the semi-statically configured downlink subband is not allowed.

[0385] Option 2 (Dynamic SBFD): Downlink reception outside the semi-statically configured downlink subbands is allowed.

[0386] <TDD-UL-DL-ConfigCommon에 의하여 플렉서블로 설정된 심볼에서의 SBFD 동작>

[0387] The following methods can be considered when operating SBFD on symbols set as flexible by TDD-UL-DL-ConfigCommon.

[0388] Alt 1: Uplink transmission within the uplink subband is permitted in this symbol. Uplink transmission outside the uplink subband is not permitted in this symbol. The frequency location of the downlink subband is known to the SBFD-aware terminal. Downlink reception within the downlink subband is permitted in this symbol.

[0389] Alt 2: Uplink transmission within an uplink subband is permitted in the symbol. Resource blocks outside the uplink subband can be used for uplink or downlink (excluding the guard band) in the symbol from the base station's perspective, and the transmission direction of all resource blocks is the same. The frequency location of the downlink subband is known to the SBFD-aware terminal. Downlink reception within the downlink subband is permitted in the symbol.

[0390] In the above symbols of the two options, uplink transmission is within the active UL BWP, and downlink reception is within the active DL BWP. For all resource blocks outside the uplink subband, the terminal cannot simultaneously use separate resource blocks for downlink and uplink.

[0391] Whether downlink reception outside of the semi-statically configured downlink subband and uplink transmission outside of the semi-statically configured uplink subband are allowed in symbols flexibly configured by TDD-UL-DL-ConfigCommon can be determined by one of the following options:

[0392] Option 1 (Semi-static): Downlink reception outside the semi-statically configured downlink subband is not allowed, and uplink transmission outside the semi-statically configured uplink subband is not allowed.

[0393] Option 2 (Dynamic SBFD): Downlink reception outside of the semi-statically configured downlink subbands is permitted. Uplink transmission outside of the semi-statically configured uplink subbands is not permitted.

[0394] Option 3 (Dynamic SBFD): Downlink reception outside of the semi-statically configured downlink subbands is permitted. Uplink transmission outside of the semi-statically configured uplink subbands is permitted.

[0395] Dynamic SBFD

[0396] For dynamic SBFD, the following can be considered:

[0397] Compared to semi-static SBFD, dynamic SBFD can better adapt to UL / DL resource requirements based on UL / DL traffic load. However, dynamic SBFD increases base station implementation complexity due to dynamic antenna / panel switching and filter / RF tuning, potentially resulting in resource loss due to switchover times, increased CLI between base stations, increased scheduling complexity, and the impact of additional specifications compared to semi-static SBFD.

[0398] If the terminal supports dynamic SBFD, the terminal implementation complexity may increase, and the CLI between terminals may increase due to dynamic SBFD.

[0399] If dynamic SBFD is supported, the following options may be considered:

[0400] Option 1: Dynamic SBFD can be achieved by DCI used to schedule downlink reception outside of the semi-statically configured SBFD downlink subbands or to schedule uplink transmissions outside of the semi-statically configured SBFD uplink subbands.

[0401] Option 2: Dynamic SBFD can be achieved via a non-scheduling DCI, which indicates whether a symbol is an SBFD symbol.

[0402] Option 3: Dynamic SBFD is achieved by a MAC-CE indicating whether a symbol is an SBFD symbol.

[0403] By introducing a flexible subband type in Option 1, it is also possible to achieve downlink reception outside the semi-statically configured SBFD downlink subband or uplink transmission outside the semi-statically configured SBFD uplink subband.

[0404] None of the above options may allow dynamic changes in downlink / uplink subband sizes.

[0405] The terminal can semi-statically receive information about the location of the SBFD symbol resource, which is a symbol that the cell operates in SBFD, from the base station. The terminal can directly receive the location of the SBFD symbol from the network. And / or the terminal can determine a symbol for which the UL subband is semi-statically set by the network as an SBFD symbol. The method in which the location of the SBFD symbol is semi-statically set / determined when the cell performs SBFD operation is called semi-static SBFD.

[0406] Meanwhile, additionally / independently, the terminal can dynamically receive information about the location of SBFD symbol resources, which are symbols in which the cell operates in SBFD, from the base station. The terminal can determine a symbol for which a UL subband is dynamically configured from the network as an SBFD symbol. The method in which the location of the SBFD symbol is dynamically set / determined when the cell performs SBFD operation is called dynamic SBFD. Additionally, in the case of dynamic SBFD, only symbols that are semi-statically set / determined as SBFD symbols can be dynamically switched to non-SBFD symbols. Alternatively, in the case of dynamic SBFD, it may be possible for a symbol that is semi-statically set / determined as an SBFD symbol to be dynamically switched to a non-SBFD symbol, and for a symbol that is semi-statically set / determined as a non-SBFD symbol to be dynamically switched to an SBFD symbol.

[0407] In the case of setting / determination of a semi-static SBFD symbol, in order to minimize the transition point between SBFD symbols and non-SBFD symbols, consecutive symbol resources within a specific period / specific section may be set / determination as SBFD symbols, and the remaining resources may be set / determination as non-SBFD symbols. This period / section may be identical to the period of the configuration information set by TDD-UL-DL-ConfigCommon.

[0408] Meanwhile, when dynamic SBFD is applied, a specific SBFD symbol may be switched to a non-SBFD symbol. Therefore, compared to a method that operates only based on semi-static SBFD symbol configuration, a phenomenon in which the switching points between SBFD symbols and non-SBFD symbols increase may occur. For example, if 5 slots are configured as DXXXU, there are 2 switching points within a period consisting of 5 slots. The n alphabets (e.g., DXXXU) represent resource configuration information applied to n consecutive slots in order, where D represents a downlink slot (non-SBFD slot), X represents an SBFD slot, and U represents an uplink slot (non-SBFD slot). Meanwhile, when dynamic SBFD is applied, for example, the third slot among the 5 slots may be switched to non-SBFD symbols, so that the 5 slots may be configured as DXDXU. In this case, SBFD symbol resources exist discontinuously within the same period, and the existing 2 switching points increase to 4. That is, the application of dynamic SBFD may cause a problem in that the number of transition points between SBFD symbols and non-SBFD symbols increases compared to the semi-static SBFD operation.

[0409] In the present disclosure, a dynamic indication method of SBFD symbols is described to minimize the transition point between SBFD symbols and non-SBFD symbols when applying dynamic SBFD.

[0410] For convenience of explanation, the following description assumes that SBFD resources can be set / determined based on symbols as units (granularity). However, SBFD resources can also be set / determined based on slots as units (granularity), and considering this, the symbols in this disclosure can be interpreted as being replaced with slots.

[0411] The present disclosure describes a method for determining SBFD symbols and non-SBFD symbols within the time resources in which a terminal operates. However, the present disclosure can be expanded and interpreted / applied as follows.

[0412] The contents of the present disclosure may be interpreted / applied in a manner that allows a terminal to determine SSFD symbols and non-SBFD symbols within a time resource. To this end, SBFD symbols in the contents of the present disclosure may be interpreted / applied by replacing them with SSFD symbols.

[0413] The terminal can be extended and interpreted / applied in a way that it determines which symbols among the semi-statically set / determined SBFD symbols are dynamically operated in SSFD. To this end, in the contents of the present disclosure, symbols that are switched to non-SBFD, which are indicated for dynamic SBFD operation, can be interpreted / applied by replacing them with symbols that are dynamically switched to SSFD operation.

[0414] The method for determining which symbols dynamically operate as SBFD among the semi-statically set / determined SSFD symbols by a terminal can be expanded and interpreted / applied. To this end, in the contents of the present disclosure, the semi-statically set / determined SBFD symbols can be interpreted / applied by replacing them with semi-statically set / determined SSFD symbols, and the symbols switched to non-SBFD indicated for dynamic SBFD operation can be interpreted / applied by replacing them with symbols dynamically switched to SBFD operation.

[0415] Figure 18 illustrates SBFD symbols that are set / judged semi-statically.

[0416] Referring to Fig. 18, consecutive symbols from symbol #n to symbol #n+d within a period (or specific time interval) P are semi-statically set / determined SBFD symbols. In this case, symbol #n becomes a transition point from a non-SBFD symbol to an SBFD symbol, and symbol #n+d+1 becomes a transition point from an SBFD symbol to a non-SBFD symbol.

[0417] The period P may indicate the period of setting the semi-static SBFD symbol. The semi-static SBFD symbol may be applied repeatedly with a period of P. This period P may be the same as the period set by TDD-UL-DL-ConfigCommon. For example, TDD-UL-DL-ConfigCommon may set one TDD UL-DL pattern or two TDD UL-DL patterns, and indicates the period of the TDD UL-DL pattern through 'dl-UL-TransmissionPeriodicity'. In this case, when only one TDD UL-DL pattern is set, the period P (i.e., the period of setting the semi-static SBFD symbol) may be the same as the TDD UL-DL pattern period set by 'dl-UL-TransmissionPeriodicity'. When two TDD UL-DL patterns are configured, the period P may be the same as the sum of the two TDD-UL-DL pattern periods configured by dl-UL-TransmissionPeriodicity in TDD-UL-DL-ConfigCommon.

[0418] If a cell supports dynamic SBFD, a symbol that is statically set as an SBFD symbol may be switched to a non-SBFD symbol. In the example of Fig. 18, all or part of the consecutive symbols from symbol #n to symbol #n+d may be switched to non-SBFD symbols.

[0419] As shown in Fig. 18, when the SBFD symbol is set / determined semi-statically, there are at most two transition points between SBFD symbols and non-SBFD symbols within a period P. To support dynamic SBFD without increasing the number of transition points, the present disclosure proposes the following.

[0420] Suggestion Method 1.

[0421] Let us assume that consecutive symbols from symbol #n to symbol #n+d within a period P are set as SBFD symbols, and the remaining symbols are set as non-SBFD symbols. In this case, a consecutive SBFD symbols from symbol #n (i.e., a SBFD symbols that are positioned chronologically after symbol #n) can be (dynamically) switched to non-SBFD symbols. And / or b consecutive SBFD symbols in reverse chronological order from symbol #n+d (i.e., that are positioned chronologically before symbol #n+d) can be (dynamically) switched to non-SBFD symbols.

[0422] Additionally / independently, if a symbol that is statically set / judged as a non-SBFD symbol is allowed to be dynamically switched to an SBFD symbol, a' consecutive non-SBFD symbols in reverse chronological order starting from symbol #n-1 can be (dynamically) switched to an SBFD symbol, and / or b' consecutive non-SBFD symbols in reverse chronological order starting from symbol #n+d+1 can be (dynamically) switched to an SBFD symbol.

[0423] At this time, the period P may be the same as the period of the SBFD symbol location information that the terminal has semi-statically set / determined (or the period set by TDD-UL-DL-ConfigCommon).

[0424] Figure 19 shows examples in which some of the SBFD symbols existing within period P are switched (converted) to non-SBFD symbols.

[0425] Referring to (a) of Fig. 19, multiple SBFD symbols can be set (exist) within the period P. In this case, among the multiple SBFD symbols, a SBFD symbols starting from the first SBFD symbol (191) and b SBFD symbols starting from the last SBFD symbol (192) in reverse time order can be switched / converted to non-SBFD symbols.

[0426] For example, when the above multiple SBFD symbols are symbol #n, n+1, ... n+d, i) symbols from symbol #n to symbol #n+a-1, and ii) symbols from symbol #n+d-(b-1) to symbol #n+d can be switched / converted to non-SBFD symbols.

[0427] In this way, after switching / transitioning SBFD symbols to non-SBFD symbols, the symbols within period P are positioned in the order of non-SBFD symbols, SBFD symbols, and non-SBFD symbols. Therefore, transitions between SBFD symbols and non-SBFD symbols occur only twice within period P.

[0428] If, as in (b) of FIG. 19, the switching / transition of SBFD symbols to non-SBFD symbols is performed in the middle of SBFD symbols, then after the switching / transition, the symbols within the period P are positioned in the following order: non-SBFD symbols, SBFD symbol(s), non-SBFD symbol(s), SBFD symbol(s), non-SBFD symbols. That is, the transition between SBFD symbols and non-SBFD symbols occurs four times. This increases the operational complexity of the base station and the terminal, and there is a problem that the overhead due to the transition section increases.

[0429] Therefore, the present disclosure proposes to switch (convert) some of the SBFD symbols into non-SBFD symbols in a manner similar to (a) of FIG. 19. Hereinafter, reference to FIG. 19 means reference to (a) of FIG. 19.

[0430] Below, a method for determining information that a terminal receives from a base station for the operation of the aforementioned dynamic SBFD and information on a symbol for which the terminal switches to non-SBFD is described.

[0431] For dynamic SBFD operation, the terminal may receive all or part of the following information from the network, and based on this information, determine the information of the symbol to be switched to non-SBFD.

[0432] The terminal may be instructed with information that can interpret / infer the value of a (see FIG. 19) or a value corresponding to a, or the value of a. Specifically, such information may be as follows.

[0433] Alt 1-1. The terminal can be instructed to specify the value of a, i.e., the number of symbols that are switched to non-SBFD symbols. In this case, the terminal can determine that a consecutive number of SBFD symbols, starting from symbol #n, are switched to non-SBFD symbols based on the starting point of the cycle (e.g., symbol #0 in FIG. 19, and the same applies hereinafter).

[0434] Alt 1-2. The terminal can be instructed to correspond to a-1. In this case, the terminal can determine that a consecutive number of SBFD symbols from symbol #n to symbol #n+a-1, based on the starting point of the cycle, are switched to non-SBFD symbols.

[0435] Alt 1-3. The terminal can be instructed to correspond to a value corresponding to n+a-1. In this case, the terminal can determine that a consecutive SBFD symbols from symbol #n to symbol #n+a-1 based on the starting point of the cycle are switched to non-SBFD symbols. The terminal can determine that the consecutive symbols from the starting symbol of the cycle (i.e., symbol #0) to symbol #n+a-1 are used as non-SBFD symbols.

[0436] The terminal may be instructed with information that can interpret / infer the value of b (see FIG. 19) or a value corresponding to b or the value of b. Specifically, such information may be as follows.

[0437] Alt 2-1. The terminal can be instructed to specify the value of b, i.e., the number of symbols that will be switched to non-SBFD symbols. In this case, the terminal can determine that b consecutive SBFD symbols, starting from symbol #n+d in reverse chronological order from the start of the cycle (e.g., symbol #0), will be switched to non-SBFD symbols.

[0438] Alt 2-2. The terminal can be instructed to correspond to a value corresponding to b-1. In this case, the terminal can determine that b consecutive SBFD symbols from symbol #n+d-(b-1) to symbol #n+d, based on the starting point of the cycle, are switched to non-SBFD symbols.

[0439] Alt 2-3. The terminal can be instructed to specify a value corresponding to n+d-(b-1). In this case, the terminal determines that b consecutive SBFD symbols from symbol #n+d-(b-1) to symbol #n+d, based on the starting point of the cycle, are switched to non-SBFD symbols. In other words, the terminal determines that consecutive symbols from symbol #n+d-(b-1) to the last symbol of the cycle are used as non-SBFD symbols.

[0440] Based on these instructions, the terminal determines that among the symbols judged as SBFD symbols, a consecutive number of SBFD symbols from symbol #n to symbol #n+a-1 are used as non-SBFD symbols and performs signal / channel transmission / reception. And / or, the terminal determines that b consecutive SBFD symbols from symbol #n+d-(b-1) to symbol #n+d are used as non-SBFD symbols and performs signal / channel transmission / reception.

[0441] Additionally / independently, if a symbol that is statically set / judged as a non-SBFD symbol is allowed to be dynamically switched to an SBFD symbol, the terminal may receive all or part of the following information from the network for the above-described dynamic SBFD operation, and may determine information on a symbol to be switched to non-SBFD based on this information.

[0442] The terminal may be instructed to provide information that can interpret / infer a' or a value corresponding to a' or the value of a'. This information may be specifically as follows.

[0443] Alt 1-1. The terminal can be instructed by the value of a', i.e., the number of symbols that will be switched to SBFD symbols. In this case, the terminal can determine that a' consecutive non-SBFD symbols, starting from symbol #n-1 in reverse chronological order from the start of the cycle, will be switched to SBFD symbols.

[0444] Alt 1-2. The terminal can be instructed to specify a value corresponding to a'-1. In this case, the terminal can determine that a' consecutive non-SBFD symbols from symbol #n-1 to symbol #n-1-(a'-1) in reverse chronological order, starting from the start point of the cycle, are switched to SBFD symbols.

[0445] Alt 1-3. The terminal can be instructed to correspond to a value corresponding to n-a'. In this case, the terminal can determine that a' consecutive non-SBFD symbols, starting from symbol #n-1 in reverse chronological order to symbol #n-a', based on the starting point of the cycle, are switched to SBFD symbols.

[0446] The terminal may be instructed to provide information that can interpret / infer the value of b' or a value corresponding to b'. This information may be specifically as follows.

[0447] Alt 2-1. The terminal can be instructed on the value of b', i.e., the number of symbols that will be switched to SBFD symbols. In this case, the terminal can determine that b' consecutive non-SBFD symbols, starting from symbol #n+d+1, from the start of the cycle, will be switched to SBFD symbols.

[0448] Alt 2-2. The terminal can be instructed to correspond to a value corresponding to b'-1. In this case, the terminal can determine that b' consecutive non-SBFD symbols from symbol #n+d+1 to symbol #n+d+1+(b'-1) based on the start point of the cycle are switched to SBFD symbols.

[0449] Alt 2-3. The terminal can be instructed to correspond to a value corresponding to n+d+b'. In this case, the terminal can determine that b' consecutive non-SBFD symbols from symbol #n+d+1 to symbol #n+d+b', based on the starting point of the cycle, are switched to SBFD symbols.

[0450] Based on these instructions, the terminal determines that a' consecutive non-SBFD symbols from symbol #n-a' to symbol #n-1 among the symbols judged as non-SBFD symbols are used as SBFD symbols and performs signal / channel transmission / reception. And / or, the terminal determines that b' consecutive non-SBFD symbols from symbol #n+d+1 to symbol #n+d+b' are used as SBFD symbols and performs signal / channel transmission / reception.

[0451] Below, a method for a terminal to receive signaling information from a network for operation of the above-described dynamic SBFD is described.

[0452] The terminal can receive the above information from the network via RRC signaling, MAC-CE signaling, and / or DCI signaling.

[0453] In this case, the terminal can directly receive the above information(s) applied by the terminal from the network through signaling.

[0454] And / or, the terminal may be instructed from the network via RRC signaling or the like of multiple candidate values ​​that the terminal can apply to each of the above information(s). Thereafter, the terminal may be instructed via MAC-CE signaling and / or DCI signaling as to which of the multiple candidate values ​​the terminal actually applies.

[0455] And / or, the terminal may be instructed of multiple configuration sets of the above information from the network. Each configuration set may include multiple pieces of information for determining the symbol positions that are switched to non-SBFD as described above. These configuration sets may be instructed through RRC signaling, etc. Thereafter, the terminal may be instructed of information about the configuration set actually applied by the terminal among the multiple configuration sets from the network through MAC-CE signaling and / or DCI signaling.

[0456] Below, a method for a terminal to determine a time interval to which instruction information for the operation of the above dynamic SBFD is applied is described.

[0457] The above instructions may be applied for a continuous period of time or only for a portion of the time period from the time the terminal receives the instructions. More specifically, these instructions may be applied for the following time periods:

[0458] Alt a. The instruction information may be applied periodically from the start of the nearest period after the time at which the terminal receives the instruction information. More specifically, when the terminal receives the instruction information in slot #m, the information may be applied periodically from the start of the nearest period after slot #m or slot #m+1 or slot #m+z. The instruction may be applied continuously until the terminal receives and applies the next instruction. Additionally, the period at which the instruction information is applied may be equal to P or Q. In this case, specifically, Q = q*P. That is, when the period of the semi-static SBFD configuration information is P, the instruction information for the operation of the dynamic SBFD may be applied periodically once for every period of q pieces of semi-static SBFD configuration information. Characteristically, the value of q may always be equal to 1.

[0459] Alt b. This can be applied once for the nearest cycle after the terminal receives this instruction information. More specifically, if the terminal receives this instruction information in slot #m, this information can be applied to the nearest cycle after slot #m, slot #m+1, or slot #m+z.

[0460] Alt c. This can be applied once for a specific period / specific section after the terminal receives this instruction information. More specifically, if the terminal receives this instruction information in slot #m, this information can be applied to the Kth period based on the closest period after slot #m, slot #m+1, or slot #m+z.

[0461] Alt d. This can be applied during a specific time interval after the terminal receives this instruction information. More specifically, if the terminal receives this instruction information in slot #m, this information can be applied from the Kth cycle to the K+Lth cycle based on the closest cycle after slot #m, slot #m+1, or slot #m+z. Notably, this K value can always be equal to 0.

[0462] The period in the above may mean the period section of SBFD symbol location information that the terminal has semi-statically set / judged.

[0463] For the above operation, the terminal can receive a value corresponding to z from the network through RRC and / or DCI signaling.

[0464] Additionally / independently, for the above operation, the terminal may receive a value corresponding to Q or a value corresponding to q from the network via RRC, MAC-CE, and / or DCI signaling.

[0465] Additionally / independently, for the above operation, the terminal may receive a value corresponding to K from the network via RRC, MAC-CE, and / or DCI signaling.

[0466] Additionally / independently, for the above operation, the terminal may receive a value corresponding to L from the network via RRC, MAC-CE, and / or DCI signaling.

[0467] As another method of determining the time period to which such instructions are applied, the terminal may receive instruction information for the operation of the above-described dynamic SBFD from the network through RRC signaling and / or MAC-CE signaling, and thereafter, the terminal may receive activation / deactivation information of the instruction information set from the network through MAC-CE signaling and / or DCI signaling.

[0468] When the terminal receives activation information from the network, it can periodically apply the instruction information for the operation of the configured dynamic SBFD as in Alt a.

[0469] When the terminal receives deactivation information from the network, it can stop applying the instruction information for the operation of dynamic SBFD.

[0470] Additionally, the terminal may receive multiple sets of instruction information for the operation of dynamic SBFD from the network through RRC signaling and / or MAC-CE signaling, and thereafter, the terminal may receive an index of a set of instruction information to which the instruction information is applied, together with the activation / deactivation information of the instruction information received through MAC-CE signaling and / or DCI signaling, from the network.

[0471] Additionally, when activation information is indicated to a terminal, a Q or q value for determining the period in which the indication information is applied may be indicated together. Alternatively, the Q or q value for determining the period in which the indication information is applied may be included and set in the indication information for the operation of dynamic SBFD that the terminal receives from the network through RRC signaling and / or MAC-CE signaling.

[0472] Below, a method of receiving multiple sets of instruction information for the above-described dynamic SBFD operation and applying each set to a different time interval is described.

[0473] In addition to the method by which the terminal determines the time interval during which the instruction information for dynamic SBFD operation is applied, the terminal may receive multiple sets of the instruction information from the network. In this case, different sets of settings may be applied at different intervals. These multiple sets of settings may be indicated through the same signaling (e.g., through the same DCI).

[0474] More specifically, the terminal may receive M sets of settings from the network. The terminal may determine that these sets of settings are sequentially applied to M consecutive cycles. For example, the m-th set of settings may be applied to the m-th cycle.

[0475] Alternatively, the terminal may be instructed with M sets of settings, and for each set of settings, the terminal may be instructed with an L value to which the set of settings applies. In this case, when the terminal receives the L value applicable to each set of settings, the terminal may apply the set of settings to the Lth cycle.

[0476] Suggestion method 2.

[0477] Proposed method 2 is a method in which, when consecutive symbols within one period P are composed of SBFD symbols and the remaining symbols are composed of non-SBFD symbols, all SBFD symbols existing within a specific time interval (e.g., period p) are (dynamically) switched to non-SBFD symbols.

[0478] At this time, the period P may be the same as the period of the SBFD symbol location information that the terminal has semi-statically set / judged (or the period set by TDD-UL-DL-ConfigCommon).

[0479] Fig. 20 is a method of switching some of the SBFD symbols into non-SBFD symbols according to proposed method 2.

[0480] Referring to FIG. 20, among a plurality of periods (e.g., period #p-1, period #p, period #p+1, period #p+2) in which one period is P, some consecutive symbols within each period are composed of SBFD symbols, and the remaining symbols are composed of non-SBFD symbols. At this time, by a specific instruction, all SBFD symbols existing within a time section corresponding to a specific period (e.g., period #p) among the plurality of periods can be switched / converted to non-SBFD symbols.

[0481] That is, if it is necessary to switch some of the SBFD symbols set in multiple periods to non-SBFD symbols, all SBFD symbols within a specific period (e.g., period #p) among the multiple periods are switched / converted to non-SBFD symbols.

[0482] This method has the advantage of having small signaling overhead and reducing operational complexity.

[0483] Below, a method for determining information that a terminal receives from a base station for the operation of the above-described dynamic SBFD and information on a symbol for which the terminal switches to non-SBFD is described.

[0484] For the above dynamic SBFD operation, the terminal may receive all or part of the following information from the network, and determine information on symbols to be switched to non-SBFD based on this information.

[0485] The terminal may be instructed on the position of the cycle in which switching to a non-SBFD symbol is performed, i.e., the p value, which is the index value of the cycle, or information that can interpret / infer that value.

[0486] The terminal may be instructed with information that allows it to interpret / infer the length Q value of the period during which it performs switching to a non-SBFD symbol. Characteristically, this Q value may be equal to q*P. For the above operation, the terminal may be configured with a value corresponding to Q or a value corresponding to q from the network. Or characteristically, this q value may always be equal to 1 (i.e., Q may be equal to P, which is the period of the SBFD symbol position information that is semi-statically configured / determined).

[0487] Based on these instructions, the terminal can determine that among the symbols indicated as SBFD symbols, the SBFD symbols existing within cycle #p are used as non-SBFD symbols and perform signal / channel transmission / reception.

[0488] Below, a method for a terminal to receive signaling information from a network for operation of the above-described dynamic SBFD is described.

[0489] The terminal can receive the above information from the network via RRC signaling, MAC-CE signaling, and / or DCI signaling. In this case, the terminal can directly receive the information(s) applied by the terminal from the network via signaling.

[0490] And / or, the terminal may be instructed from the network via RRC signaling or the like of multiple candidate values ​​that the terminal can apply to each of the above information(s). Thereafter, the terminal may be instructed via MAC-CE signaling and / or DCI signaling as to which of the multiple candidate values ​​the terminal actually applies.

[0491] Below, a method for determining a time resource corresponding to a period #p is described when it is determined that SBFD symbols existing in period #p are used as non-SBFD symbols through instruction information for the operation of the above-described dynamic SBFD.

[0492] The terminal can determine the position of period #p based on the time at which it receives the above instruction.

[0493] Alt a. The position of cycle #p can be determined based on the start time of the closest cycle after the time at which the terminal receives such instruction information. More specifically, if the terminal receives such instruction information in slot #m, this information can be applied to the pth cycle based on the start time of the closest cycle after slot #m, slot #m+1, or slot #m+z. In this case, each cycle can be equal to the above Q.

[0494] Alt b. The position of period #p can be determined based on the start time of the closest period set after the time at which the terminal receives such instruction information. When the terminal receives such instruction information in slot #m, this information can be applied to the pth period based on the start time of the closest period set after slot #m or slot #m+1 or slot #m+z. A period set is a time section including multiple consecutive periods, and one period set can be composed of Z periods. When the length of each period is equal to Q, the length of each period set is equal to Z*Q, and such period sets can exist periodically.

[0495] Alt c. The terminal can periodically determine the position of period #p based on the start time of the closest period set after the time at which the terminal receives such instruction information. When the terminal receives such instruction information in slot #m, this information can be applied to the pth period based on the start time of the closest period set after slot #m or slot #m+1 or slot #m+z, and this instruction can be applied periodically every Z periods. A period set is a time section including multiple consecutive periods, and one period set can be composed of Z periods. When the length of each period is equal to Q, the length of each period set is equal to Z*Q, and such period sets can exist periodically.

[0496] The period in the above may mean the period section of the SBFD symbol location information that the terminal has semi-statically set.

[0497] For the above operation, the terminal can receive a value corresponding to Z or a value corresponding to Z*Q from the network through RRC, MAC-CE, and / or DCI signaling.

[0498] As another method of determining the position of the period #p to which such instructions are applied, the terminal may receive instruction information for the operation of the above-described dynamic SBFD from the network through RRC signaling and / or MAC-CE signaling, and thereafter, the terminal may receive instruction information for activation / deactivation of the instruction information set from the network through MAC-CE signaling and / or DCI signaling.

[0499] When the terminal receives activation information from the network, it can periodically apply the instruction information for the operation of the configured dynamic SBFD as in Alt c above.

[0500] When the terminal receives deactivation information from the network, it can stop applying the instruction information for the operation of dynamic SBFD.

[0501] Additionally, the terminal may receive multiple sets of instruction information for the operation of dynamic SBFD from the network through RRC signaling and / or MAC-CE signaling, and thereafter, the terminal may receive an index of a set of instruction information to which the instruction information is applied, together with the activation / deactivation information of the instruction information received through MAC-CE signaling and / or DCI signaling, from the network.

[0502] Additionally, when activation information is indicated to a terminal, a Z or Z*Q value for determining the period in which the instruction information is applied may be indicated together. Alternatively, the Z or Z*Q value for determining the period in which the instruction information is applied may be included and set in the instruction information for the operation of dynamic SBFD that the terminal receives from the network through RRC signaling and / or MAC-CE signaling.

[0503] Below, a method for receiving multiple p-values ​​for dynamic SBFD operation as described above is described. These p-values ​​represent cycle indices, but can be replaced and interpreted with other information that can interpret / infer the position information of the cycle performing the non-SBFD switch. Information regarding these multiple p-values ​​can be indicated via the same signaling (e.g., via the same DCI).

[0504] A terminal can independently receive multiple p values ​​from the network. When this information is signaled via DCI, the multiple p values ​​may be indicated via different DCIs. Alternatively, the multiple p values ​​may be indicated via the same DCI, but in independent fields.

[0505] Alternatively, the above multiple p values ​​may be combined and indicated as a single piece of information. When such information is signaled via DCI, the terminal may receive multiple p values ​​from the network via the same field within the same DCI.

[0506] For example, the plurality of p values ​​may be indicated in a bitmap format. The terminal may receive a bitmap composed of Z bits from the network and interpret / determine the position of the bit indicated as 1 (or indicated as 0) as the value of p. For example, if the 2nd and 4th bits among the 5 bits constituting the bitmap are indicated as 1, the terminal may determine that two p values ​​are indicated and that the two p values ​​are 2 and 4.

[0507] Alternatively, when multiple p values ​​constitute a single set, the terminal may receive information about the multiple sets and the multiple p values ​​constituting each set from the network. Furthermore, the terminal may receive an index value corresponding to each set from the network. Thereafter, the terminal may be instructed by the network, via signaling such as MAC-CE and / or DCI, of the index value corresponding to the specific set applied by the terminal.

[0508] For the above operation, the terminal can receive a value corresponding to Z from the network through RRC and / or DCI signaling.

[0509] When a terminal is instructed with multiple p values ​​(i.e., p1, p2, …, pM) through the above instructions, the terminal can determine that SBFD symbols existing in the time intervals corresponding to period #p1, period #p2, …, period #pM are switched / converted to non-SBFD symbols.

[0510] Figure 21 illustrates an operation method of a terminal in a wireless communication system.

[0511] Referring to FIG. 21, the terminal receives first information for setting periodic full duplex (FD) time resources (S211).

[0512] The terminal receives second information indicating non-FD time resources, wherein the second information is information for switching some of the FD time resources to the non-FD time resources in units of a specific section (e.g., P) (S212).

[0513] For example, the second information may be a specific time section called P as an indication unit. The second information may be information that instructs or notifies switching of some or all of the SBFD time resources within a specific section to non-SBFD time resources among the multiple consecutive sections having a time length called P. In this sense, the second information may be information that notifies resource switching on a unit basis of the specific section (P).

[0514] The specific interval may be, for example, a time interval equal to a TDD period provided by TDD (time division duplex) configuration information or a multiple of the TDD period. The TDD configuration information may be, for example, 'TDD-UL-DL-ConfigCommon' that determines cell-specific uplink / downlink TDD configuration. This TDD configuration information may indicate the period of a downlink-uplink pattern (which may also be referred to as an uplink-downlink pattern), which may be referred to as a TDD period. In addition, information indicating the TDD period may be referred to as TDD period information.

[0515] The terminal performs transmission and reception operations based on the first information and the second information (S213).

[0516] For example, the FD time resources may be a plurality of consecutive symbols within a specific section P, as described in FIGS. 18 and 19. At this time, among the FD time resources, the time resource switched to a non-FD time resource may include N1 consecutive symbols (N1 is a natural number) from the first symbol among the plurality of symbols and N2 consecutive symbols (N2 is a natural number) from the last symbol among the plurality of symbols.

[0517] An example of the above non-FD time resource has been described above with reference to FIG. 19. That is, multiple SBFD symbols may exist within a period P, and in this case, among the multiple SBFD symbols, a SBFD symbols (corresponding to the above N1) starting from the first SBFD symbol (191) and b SBFD symbols (corresponding to the above N2) in reverse time order starting from the last SBFD symbol (192) may be switched / converted to non-SBFD symbols.

[0518] The second information may include information related to N1 and information related to N2.

[0519] According to an embodiment, the terminal may receive candidate values ​​of the N1 and the N2 through an RRC (radio resource control) message, and may receive information indicating at least one of the candidate values ​​through at least one of a MAC (media access control) CE (control element) and DCI (downlink control information).

[0520] For example, a first list of candidate values ​​of the N1 and a second list of candidate values ​​of the N2 can be set through an RRC message, which is a higher layer signal. The first list can have M1 candidate values, and the second list can have M2 candidate values. M1 and M2 are natural numbers. Information indicating the m1th value (m1 is any natural number from 1 to M1) in the first list and information indicating the m2th value (m2 is any natural number from 1 to M2) in the second list can be indicated through at least one of MAC CE and DCI.

[0521] According to an embodiment, a list including multiple combinations of candidate values ​​of the N1 and candidate values ​​of the N2 may be set via an RRC message, and information indicating at least one of the combinations of candidate values ​​may be received via at least one of the MAC CE and the DCI.

[0522] The operation of switching some of the above FD time resources to the non-FD time resources can be performed with the minimum unit being the above-mentioned TDD period, for example, the period of the TDD (time division duplex) uplink-downlink pattern. For example, as shown in FIG. 19, when SBFD symbols are set with period P as a unit and some of the SBFD symbols within the period P are switched to non-FD symbols, the period P can mean the period of the TDD UL-DL pattern or a multiple of the period of the TDD UL-DL pattern. The period of the TDD UL-DL pattern can be set, for example, by 'TDD-UL-DL-ConfigCommon', which determines cell-specific UL / DL TDD settings.

[0523] The following table is an example of 'TDD-UL-DL-ConfigCommon'.

[0524] [Table 5]

[0525]

[0526] In the above table, 'dl-UL-TransmissionPeriodicity' indicates the period of the aforementioned TDD UL-DL pattern (hereinafter abbreviated as UL-DL pattern). 'dl-UL-TransmissionPeriodicity' can be an example of TDD period information. 'nrofDownlinkSlots' indicates the number of consecutive full downlink slots at the beginning of each UL-DL pattern. A full downlink slot can be a slot in which all symbols in the slot are downlink symbols. 'nrofDownlinkSymbols' indicates the number of consecutive downlink symbols at the beginning of the slot following the last full downlink slot. 'nrofUplinkSlots' indicates the number of consecutive full uplink slots at the end of each UL-DL pattern. A full uplink slot can be a slot in which all symbols in the slot are uplink symbols. 'nrofUplinkSymbols' tells the number of consecutive uplink symbols at the end of the slot before the first full uplink slot.

[0527] Depending on the embodiment, the FD time resources may be semi-statically set by upper layer signals. On the other hand, the non-FD time resources may be dynamically indicated by DCI.

[0528] In some embodiments, when the FD time resources are set to multiple periods, the non-FD time resources may include all FD time resources included in any one of the multiple periods. This operation has been described above with reference to FIG. 20. That is, as illustrated in FIG. 20, when some consecutive symbols within each period are composed of SBFD symbols and the remaining symbols are composed of non-SBFD symbols among multiple periods (e.g., period #p-1, period #p, period #p+1, period #p+2), the second information may indicate or inform any one of the multiple periods (e.g., period #p). Then, the terminal may perform a transmission / reception operation with the network after switching / converting all SBFD symbols existing in any one of the periods (e.g., period #p) to non-SBFD symbols. Here, for the convenience of explanation, the case where the second information indicates any one of the multiple periods is exemplified, but this is not a limitation. That is, the second information may indicate two or more cycles among the plurality of cycles.

[0529] According to the method described in Fig. 21, when switching an FD time resource (e.g., an SBFD time resource) to a non-FD time resource (e.g., a non-SBFD time resource), there is an advantage in that the number of occurrences of transitions between the FD time resource and the non-FD time resource can be reduced.

[0530] That is, according to the method according to the present disclosure, when a fallback operation is supported in which a time resource set as an SBFD resource is switched to a non-SBFD resource and used, the frequency of occurrence of transitions between SBFD time resources and non-SBFD time resources can be reduced. Accordingly, an increase in operational complexity between devices can be prevented, and a decrease in throughput due to frequent transition sections can also be prevented.

[0531] Fig. 22 shows an example of a base station and a terminal operating in a wireless communication system according to the method of Fig. 21.

[0532] Referring to FIG. 22, the base station provides TDD configuration information including TDD period information to the terminal (S220).

[0533] The base station transmits first information for setting periodic full duplex (FD) time resources to the terminal (S221).

[0534] The base station transmits second information informing the terminal of non-FD time resources (S222). The second information may refer to information related to switching some of the FD time resources to non-FD time resources in units of a specific period. The specific period may be, for example, equal to the TDD period provided by the TDD configuration information or a multiple of the TDD period. This has already been described above with reference to FIG. 21.

[0535] The terminal determines FD time resources and non-FD time resources based on the first information and the second information (S223). This determination process is described above in FIGS. 19 and 20.

[0536] The base station and the terminal perform transmission and reception operations according to the type of each time resource (i.e., whether it is an FD time resource or a non-FD time resource) (S224).

[0537] In the example of Fig. 22, an example is described in which the first information is provided separately from the TDD configuration information, but the first information may be included in the TDD configuration information and provided to the terminal.

[0538] Additionally, in the example of FIG. 22, the first information and the second information are provided separately through different signals, but they may also be provided within the same signal.

[0539] TDD configuration information and the first information may be provided via an RRC signal, and the second information may be provided via a MAC CE and / or DCI. A specific example of this operation is described above with reference to FIG. 21. Alternatively, both the first and second information may be provided via a higher-layer signal, such as an RRC signal.

[0540] Figure 23 illustrates a wireless device applicable to the present specification.

[0541] Referring to FIG. 23, 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).

[0542] A first wireless device (100) includes one or more processors (102) and one or more memories (104), and may further include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memories (104) and / or the transceivers (106), 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 via 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 wireless signals via 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.The processor (102) receives first information that sets periodic full duplex (FD) time resources, receives second information that indicates non-FD time resources, and performs a transmission and reception operation based on the first information and the second information. At this time, the second information is information that switches some of the FD time resources to the non-FD time resources in units of a specific section. The specific section may be, for example, the same as a TDD period provided by TDD (time division duplex) setting information or a multiple of the TDD period.

[0543] The second wireless device (200) includes one or more processors (202), one or more memories (204), and may further include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memories (204) and / or the transceivers (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 / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). Furthermore, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of the fourth information / signals 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.The processor (202) transmits first information for setting periodic full duplex (FD) time resources to a terminal, transmits second information for indicating non-FD time resources to the terminal, and communicates with the terminal based on the first information and the second information. The second information is information for switching some of the FD time resources to the non-FD time resources in units of a specific section. The specific section may be, for example, equal to a TDD period provided by TDD (time division duplex) setting information or a multiple of the TDD period.

[0544] 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.

[0545] 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 being executed by at least one processor.

[0546] That is, at least one computer readable medium (CRM) including instructions based on being executed by at least one processor performs the steps of receiving first information for setting periodic full duplex (FD) time resources, receiving second information indicating non-FD time resources, and performing a transmission and reception operation based on the first information and the second information. The second information is information for switching some of the FD time resources to the non-FD time resources.

[0547] 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.

[0548] 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.

[0549] 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.

[0550] Fig. 24 illustrates an example of a signal processing module structure. Here, signal processing may be performed in the processor (102, 202) of Fig. 23.

[0551] Referring to FIG. 24, 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).

[0552] 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.

[0553] 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.

[0554] 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.

[0555] 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.

[0556] The signal generator (306) can generate a complex-valued time domain OFDM symbol signal by modulating a complex modulation symbol for each antenna port, i.e., an antenna-specific symbol, 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.

[0557] Fig. 25 illustrates another example of a 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. 23.

[0558] Referring to FIG. 25, 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).

[0559] 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).

[0560] 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.

[0561] The above complex modulation symbol can be mapped to one or more transmission layers by the layer mapper (403).

[0562] 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.

[0563] 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.

[0564] The resource block mapper (405) can assign complex modulation symbols to appropriate subcarriers and multiplex them according to the user.

[0565] 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.

[0566] The signal processing process of the receiving device may be configured in reverse order of the signal processing process of the transmitter. Specifically, the processor of the receiving device performs decoding and demodulation on a wireless signal received externally through the antenna port(s) of the transceiver. The receiving device may include a plurality of multiple receiving antennas, and each signal received through the receiving antenna is restored to a baseband signal and then multiplexed and MIMO demodulated to be restored to a data sequence originally intended to be transmitted by the transmitting device. The receiving device (1820) may include a signal restorer for restoring the received signal to a baseband signal, a multiplexer for combining and multiplexing the received and processed signals, and a channel demodulator for demodulating the multiplexed signal sequence into a corresponding codeword. The signal restorer, the multiplexer, and the channel demodulator may be configured as an integrated module performing their functions or as individual modules. More specifically, the signal restorer may include an analog-to-digital converter (ADC) that converts an analog signal into a digital signal, a CP remover that removes a CP from the digital signal, an FFT module that applies an FFT (fast Fourier transform) to a signal from which the CP has been removed to output a frequency domain symbol, and a resource element demapper / equalizer that restores the frequency domain symbol to an antenna-specific symbol. The antenna-specific symbol is restored to a transmission layer by a multiplexer, and the transmission layer is restored to a codeword that the transmitter intended to transmit by a channel demodulator.

[0567] FIG. 26 illustrates an example of a wireless communication device according to an implementation example of the present disclosure.

[0568] Referring to FIG. 26, 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.

[0569] The processor (2310) can implement the functions, procedures, and methods described in this specification. The processor (2310) of FIG. 26 may be the processor (102, 202) of FIG. 23.

[0570] 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. 26 may be the memory (104, 204) of FIG. 23.

[0571] 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.

[0572] 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. 26 may be the transceiver (106, 206) of FIG. 29.

[0573] Although not shown in FIG. 26, 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).

[0574] Fig. 26 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. 26. That is, 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.

[0575] Figure 27 shows an example of a processor (2000).

[0576] Referring to FIG. 27, the processor (2000) may include a control channel transceiver (2010) and a data channel transceiver (2020). The processor (2000) may, for example, execute the methods described in FIGS. 19 to 22 from the terminal's perspective. The processor (2000) may be an example of the processors (102, 202) of FIG. 23.

[0577] Figure 28 shows an example of a processor (3000).

[0578] Referring to FIG. 28, the processor (3000) may include a control information / data generation module (3010) and a transmission / reception module (3020). The processor (3000) may execute the method described in FIGS. 19 to 22, for example, from the perspective of a base station or a network. The processor (3000) may be an example of the processor (102, 202) of FIG. 23.

[0579] Figure 29 illustrates another example of a wireless device.

[0580] According to FIG. 29, 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).

[0581] The difference between the example of the wireless device described in FIG. 23 and the example of the wireless device in FIG. 29 is that in FIG. 23, the processor (102, 202) and the memory (104, 204) are separated, but in the example of FIG. 29, the memory (104, 204) is included in the processor (102, 202). That is, the processor and the memory may constitute a single chipset.

[0582] Figure 30 illustrates another example of a wireless device applicable to the present specification. The wireless device may be implemented in various forms depending on the use case / service.

[0583] Referring to FIG. 30, the wireless device (100, 200) may correspond to the wireless device of FIG. 23 and may be composed of various elements, components, units / units, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and an additional element (140). The communication unit may include a communication circuit (112) and a transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204). For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 23. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and the additional elements (140) and controls the overall operations of the wireless device. For example, the control unit (120) can control the electrical / mechanical operations of the wireless device based on the program / code / command / information stored in the memory unit (130). In addition, the control unit (120) can transmit information stored in the memory unit (130) to an external device (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external device (e.g., another communication device) via a wireless / wired interface in the memory unit (130).

[0584] The additional element (140) may be configured in various ways depending on the type of the wireless device. For example, the additional element (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 34, 100a), a vehicle (Fig. 34, 100b-1, 100b-2), an XR device (Fig. 34, 100c), a portable device (Fig. 34, 100d), a home appliance (Fig. 34, 100e), an IoT device (Fig. 34, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or a financial device), a security device, a climate / environmental device, an AI server / device (Fig. 34, 400), a base station (Fig. 34, 200), a network node, etc. Wireless devices may be mobile or stationary depending on the use / service.

[0585] In FIG. 30, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least some may be wirelessly connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be wired, and the control unit (120) and a first unit (e.g., 130, 140) may be wirelessly connected via the communication unit (110). In addition, each element, component, unit / part, and / or module within the wireless device (100, 200) may further include one or more elements. For example, the control unit (120) may be composed of a set of one or more processors. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory, and / or a combination thereof.

[0586] Examples of mobile devices applicable to this specification are provided. Mobile devices may include smartphones, smart pads, wearable devices (e.g., smartwatches, smartglasses), and portable computers (e.g., laptops). Mobile devices may be referred to as MS (Mobile Station), UT (User Terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), or WT (Wireless Terminal).

[0587] Fig. 31 illustrates a communication system (1) applicable to this specification.

[0588] Referring to FIG. 31, 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.

[0589] 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).

[0590] 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.

[0591] 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.

[0592] 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 6 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).

[0593] [Table 6]

[0594]

[0595] 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 7 below. That is, 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 vehicular communications (e.g., autonomous driving).

[0596] [Table 7]

[0597]

[0598] 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 a method of operating a terminal in a wireless communication system, Receive first information for setting periodic full duplex (FD) time resources, Receive second information indicating a non-FD time resource, and Perform transmission and reception operations based on the first information and the second information, The second information is information for switching some of the FD time resources to the non-FD time resources in units of a specific section, A method characterized in that the above specific section is a time section equal to a TDD period provided by TDD (time division duplex) setting information or a multiple of the TDD period.

2. A method characterized in that, in the first paragraph, when the FD time resources are a plurality of consecutive symbols within the specific section, the non-FD time resources include N1 (N1 is a natural number) consecutive symbols from the first symbol among the plurality of symbols and N2 (N2 is a natural number) consecutive symbols from the last symbol among the plurality of symbols.

3. A method according to claim 2, wherein the second information includes information related to N1 and information related to N2.

4. In the second paragraph, the candidate values ​​of N1 and N2 are set through an RRC (radio resource control) message, A method characterized in that information indicating at least one of the above candidate values ​​is received through at least one of MAC (media access control) CE (control element) and DCI (downlink control information).

5. A method according to claim 1, characterized in that the operation of switching some of the FD time resources to the non-FD time resources is performed in units of a minimum period of a TDD (time division duplex) uplink-downlink pattern.

6. A method according to claim 1, characterized in that the FD time resources are set semi-statically by a higher layer signal.

7. A method according to claim 1, characterized in that the non-FD time resource is dynamically indicated by DCI.

8. A method according to claim 1, wherein, when the FD time resources are set to a plurality of periods, the non-FD time resource includes all FD time resources included in any one of the plurality of periods.

9. 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 information for setting periodic full duplex (FD) time resources, Receive second information indicating a non-FD time resource, and Including performing a transmission and reception operation based on the first information and the second information, The second information is information for switching some of the FD time resources to the non-FD time resources in units of a specific section, A terminal characterized in that the above-mentioned specific section is a time section equal to a TDD period provided by TDD (time division duplex) setting information or a multiple of the TDD period.

10. In the 9th paragraph, when the FD time resources are a plurality of consecutive symbols within the specific section, the non-FD time resources are a terminal characterized in that they include N1 (N1 is a natural number) consecutive symbols from the first symbol among the plurality of symbols and N2 (N2 is a natural number) consecutive symbols from the last symbol among the plurality of symbols.

11. A terminal according to claim 10, wherein the second information includes information related to N1 and information related to N2.

12. In the 10th paragraph, the candidate values ​​of N1 and N2 are set through an RRC (radio resource control) message, A terminal characterized in that it receives information indicating at least one of the above candidate values ​​through at least one of MAC (media access control) CE (control element) and DCI (downlink control information).

13. A terminal characterized in that, in paragraph 9, the operation of switching some of the FD time resources to the non-FD time resources is performed in units of a minimum period of a TDD (time division duplex) uplink-downlink pattern.

14. A terminal characterized in that, in the 9th paragraph, the FD time resources are set semi-statically by a higher layer signal.

15. A terminal characterized in that, in paragraph 9, the non-FD time resource is dynamically indicated by DCI.

16. In the 9th paragraph, when the FD time resources are set to a plurality of periods, the terminal is characterized in that the non-FD time resources include all FD time resources included in any one of the plurality of periods.

17. The terminal 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 information for setting periodic full duplex (FD) time resources, Receive second information indicating a non-FD time resource, and Including performing a transmission and reception operation based on the first information and the second information, The second information is information for switching some of the FD time resources to the non-FD time resources in units of a specific section, A device characterized in that the above-mentioned specific section is a time section equal to a TDD period provided by TDD (time division duplex) setting information or a multiple of the TDD period.

18. At least one computer readable medium (CRM) containing instructions based on being executed by at least one processor, A step of receiving first information for setting periodic full duplex (FD) time resources, A step of receiving second information indicating a non-FD time resource, and Including a step of performing a transmission and reception operation based on the first information and the second information, The second information is information for switching some of the FD time resources to the non-FD time resources in units of a specific section, A CRM characterized in that the above specific section is a time section equal to a TDD period provided by TDD (time division duplex) setting information or a multiple of the TDD period.

19. In a method of operating a base station in a wireless communication system, Transmits first information to the terminal that sets periodic full duplex (FD) time resources, Transmitting second information indicating non-FD time resources to the terminal, and Communicate with the terminal based on the first information and the second information, The second information is information for switching some of the FD time resources to the non-FD time resources in units of a specific section, A method characterized in that the above specific section is a time section equal to a TDD period provided by TDD (time division duplex) setting information or a multiple of the TDD period.

20. The base station, At least one transceiver; At least one memory; and At least one processor operably coupled with said at least one memory and said at least one transceiver, wherein said at least one memory comprises instructions that are executed by said at least one processor to perform operations, The above actions are, Transmits first information to the terminal that sets periodic full duplex (FD) time resources, Transmitting second information indicating non-FD time resources to the terminal, and Including communicating with the terminal based on the first information and the second information, The second information is information for switching some of the FD time resources to the non-FD time resources in units of a specific section, A base station characterized in that the above-mentioned specific section is a time section equal to a TDD period provided by TDD (time division duplex) setting information or a multiple of the TDD period.

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