Method for operating device in wireless communication system and device using same

Abstract

An operation method of an apparatus in a wireless communication system and the apparatus are provided. The apparatus receives first information for configuring a periodic full duplex (FD) time resource, receives second information indicating a non-FD time resource, and performs a transmission / reception operation based on the first information and the second information. The second information is used for switching some of the FD time resources to non-FD time resources in units of specific intervals. The specific interval may be a time division duplex (TDD) period provided by the TDD configuration information, or a time interval equal to a multiple of the TDD period.

Description

Technical Field

[0001] This disclosure relates to a method for operating a device in a wireless communication system and an apparatus for using the method. Background Technology

[0002] With an increasing number of communication devices requiring greater communication capacity, there is a need for improved mobile broadband communications relative to existing radio access technologies (RATs). Furthermore, massive machine-type communication (MTC), which provides various services by connecting numerous devices and multiple objects, is also one of the main issues to be considered in next-generation communications. Additionally, communication system designs considering reliability / latency-sensitive services / UEs are being discussed. The introduction of next-generation radio access technologies considering enhanced mobile broadband communication (eMBB), massive MTC (mMTC), and ultra-reliable low latency communication (URLLC) is being discussed. In this disclosure, for convenience, such new technologies may be referred to as new radio access technologies (new RATs or NR).

[0003] In NR, full-duplex (FD) operation is possible. During FD operation, downlink reception and uplink transmission can occur simultaneously within a given time resource, unlike half-duplex (HD) operation, where only downlink reception or uplink transmission can be performed within a specific time resource. For FD operation, i) some frequency resources can be allocated to the downlink subband and other frequency resources to the uplink subband within the same time resource, or ii) frequency resources can be allocated within the same time resource that can be used for both downlink reception and uplink transmission.

[0004] The former can be called subband full-duplex (hereinafter referred to as subband full-duplex or SBFD), while the latter can be called spectrum-shared full-duplex (hereinafter referred to as SSFD).

[0005] When the network (or cell) is operating in FD (e.g., SBFD), the UE is informed of the time resources for the network operating in SBFD, and the SBFD operation time resources can be determined from there.

[0006] Simultaneously, the device can consider rolling back some time resources configured for SBFD operations to non-SBFD time resources to increase downlink throughput. In other words, by switching some time resources configured for SBFD to non-SBFD time resources, regular HD operations (or TDD operations) can be performed in the corresponding time resources instead of FD operations.

[0007] The signaling method used for this rollback operation may be a problem.

[0008] Furthermore, in the case of the aforementioned rollback operation, the transition between SBFD and non-SBFD time resources may occur more frequently compared to the case where no rollback operation is performed. This can then lead to increased operational complexity for both the base station and the UE, as well as increased overhead due to the transition periods. Summary of the Invention

[0009] Technical issues

[0010] The technical problem this disclosure aims to solve is to provide a method for operating a device in a wireless communication system and an apparatus for using the method.

[0011] Technical solution

[0012] In one aspect, a method for operating a user equipment (UE) in a wireless communication system is provided. The method includes: receiving first information for configuring periodic full-duplex (FD) time resources; receiving second information indicating non-FD time resources; and performing transmission and reception operations based on the first and second information. The second information is information for switching some of the FD time resources to non-FD time resources in units of a specific period, and said specific period is a time interval equal to or a multiple of a time-division duplex (TDD) period provided by TDD configuration information.

[0013] In another aspect, a UE, a device, and a computer-readable medium (CRM) for performing the method are provided.

[0014] In another aspect, a method for operating a base station in a wireless communication system and a base station using the operation method are provided.

[0015] The base station sends first information to the user equipment (UE) for configuring periodic full-duplex (FD) time resources, and sends second information to the UE indicating non-FD time resources, and communicates with the UE based on the first and second information. The second information is for switching some of the FD time resources to non-FD time resources in a specific period, and the specific period is a time interval equal to or a multiple of the time-division duplex (TDD) period provided by the TDD configuration information.

[0016] Beneficial effects

[0017] According to the method of this disclosure, in the case of supporting rollback operations that switch time resources configured as SBFD resources to non-SBFD resources and use them as non-SBFD resources, the frequency of transitions between SBFD and non-SBFD time resources can be reduced. This prevents increased operational complexity between devices and also prevents throughput reduction due to frequent transition periods. Attached Figure Description

[0018] Figure 1 An example of a wireless communication system to which this disclosure can be applied is shown.

[0019] Figure 2 This is a block diagram illustrating the radio protocol architecture for the user plane.

[0020] Figure 3 This is a block diagram illustrating the radio protocol architecture used for the control plane.

[0021] Figure 4 An example of a system architecture for a next-generation radio access network (NG-RAN) using NR is presented.

[0022] Figure 5 This illustrates the functional division between NG-RAN and 5GC.

[0023] Figure 6 An example of a frame structure that can be applied to NR is shown.

[0024] Figure 7 The time slot structure is illustrated.

[0025] Figure 8 CORESET is shown as an example.

[0026] Figure 9 An example of a frame structure for a new radio access technology is shown.

[0027] Figure 10 An example of a self-contained time slot structure is shown.

[0028] Figure 11 The physical channel and typical signal transmission are illustrated.

[0029] Figure 12 An example of how to apply full-duplex within an intra-carrier is shown.

[0030] Figure 13 An example is shown where time resources operating in half-duplex (HD) and time resources operating in full-duplex (FD), such as SBFD or SSFD, coexist.

[0031] Figure 14 Examples of first time resources, second time resources, first frequency resources, and second frequency resources are shown.

[0032] Figure 15 Another example of first time resources, second time resources, first frequency resources, and second frequency resources is shown.

[0033] Figure 16 This example demonstrates a TDD rollback operation.

[0034] Figure 17 An example configuration of SBFD-DCI is shown.

[0035] Figure 18 Examples of semi-static or deterministic SBFD symbols are provided.

[0036] Figure 19 An example is shown where some SBFD symbols existing within the period P interval are switched to non-SBFD symbols.

[0037] Figure 20 An example is given of a method for switching some SBFD symbols to non-SBFD symbols according to the proposed method 2.

[0038] Figure 21 An example of the operation method of a UE in a wireless communication system is given.

[0039] Figure 22 Examples are given based on Figure 21 Examples of base station and UE operation methods in wireless communication systems.

[0040] Figure 23 Examples of wireless devices applicable to this paper are shown.

[0041] Figure 24 An example of the signal processing module structure is shown.

[0042] Figure 25 Another example of the structure of a signal processing module in a transmitting device is shown.

[0043] Figure 26 An example of a wireless communication device according to an embodiment of this disclosure is shown.

[0044] Figure 27 An example of a processor 2000 is shown.

[0045] Figure 28 An example of processor 3000 is shown.

[0046] Figure 29 Another example of a wireless device is shown.

[0047] Figure 30 Another example of a wireless device used in this paper is shown.

[0048] Figure 31 The communication system 1 used in this paper is illustrated. Detailed Implementation

[0049] In this document, “A or B” can mean “A only”, “B only”, or “both A and B”. In other words, in this document, “A or B” can be interpreted as “A and / or B”. For example, in this document, “A, B or C” can mean “A only”, “B only”, “C only”, or “any combination of A, B, and C”.

[0050] The forward slash ( / ) or comma used in this article can mean "and / or". For example, "A / B" can mean "A and / or B". Therefore, "A / B" can mean "A only", "B only", or "both A and B". For example, "A, B, C" can mean "A, B, or C".

[0051] In this document, "at least one of A and B" may mean "only A", "only B" or "both A and B". Additionally, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0052] Additionally, in this document, "at least one of A, B, and C" may mean "A only", "B only", "C only" or "any combination of A, B, and C". Furthermore, "at least one of A, B, or C" or "at least one of A, B, and / or C" may mean "at least one of A, B, and C".

[0053] Additionally, the parentheses used herein can mean "for example". Specifically, when indicated as "Control Message (PDCCH)", this can mean that "PDCCH" is cited as an example of "Control Message". In other words, "Control Message" in this document is not limited to "PDCCH", and "PDDCH" can be cited as an example of "Control Message". Specifically, when indicated as "Control Message (i.e., PDCCH)", this can also mean that "PDCCH" is cited as an example of "Control Message".

[0054] The various technical features described individually in one of the accompanying figures in this document can be implemented individually or simultaneously.

[0055] Figure 1 This illustration shows a wireless communication system to which this disclosure can be applied. This may also be referred to as an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) or an LTE (Long Term Evolution) / LTE-A system.

[0056] E-UTRAN includes a base station (BS) 20, which provides the control plane and user plane to the user equipment (UE) 10. The UE 10 can be fixed or mobile and can be referred to by other terms such as mobile station (MS), user terminal (UT), subscriber station (SS), mobile terminal (MT), radio device, terminal, etc. The BS 20 is generally a fixed station that communicates with the UE 10 and can be referred to by other terms such as evolved Node B (eNB), base transceiver system (BTS), access point, etc.

[0057] BS 20 interconnects via the X2 interface. BS also connects to the Evolved Packet Core (EPC) 30 via the S1 interface. More specifically, BS 20 connects to the Mobility Management Entity (MME) via the S1-MME and to the Serving Gateway (S-GW) via the S1-U.

[0058] EPC 30 includes an MME, an S-GW, and a Packet Data Network Gateway (P-GW). The MME contains UE access information or UE capability information, which is generally used for UE mobility management. The S-GW is a gateway with E-UTRAN as its endpoint. The P-GW is a gateway with PDN as its endpoint.

[0059] The radio interface protocol layer between the UE and the network can be divided into three layers—Layer 1 (L1), Layer 2 (L2), and Layer 3—based on the well-known Open Systems Interconnection (OSI) model in communication systems. The Physical Layer (PHY), belonging to Layer 1, provides information transmission services using physical channels. The Radio Resource Control (RRC) layer, belonging to Layer 3, controls radio resources between the UE and the network; therefore, the RRC layer exchanges RRC messages between the UE and the BS.

[0060] Figure 2 This is a block diagram illustrating the radio protocol architecture used in the user plane. Figure 3 This is a block diagram illustrating the radio protocol architecture used for the control plane. The user plane is the protocol stack used for user data transmission. The control plane is the protocol stack used for control signal transmission.

[0061] Reference Figure 2 and Figure 3 The PHY layer provides information transmission services to higher layers (i.e., higher-level layers) via physical channels. The PHY layer connects to the Media Access Control (MAC) layer, which is the layer above it, via transport channels. Data is transmitted between the MAC layer and the PHY layer via transport channels. Transport channels are classified according to how data is transmitted through the radio interface and the characteristics of the data.

[0062] Data moves between different PHY layers (i.e., the transmitter's PHY layer and the receiver's PHY layer) via physical channels. Physical channels can be modulated according to orthogonal frequency division multiplexing (OFDM) schemes and use time and frequency as radio resources.

[0063] The MAC layer's functions include mapping between logical channels and transport channels, as well as multiplexing and demultiplexing into transport blocks provided via physical channels on the transport channels of MAC Service Data Units (SDUs) that belong to the logical channels. The MAC layer provides services to the Radio Link Control (RLC) layer through logical channels.

[0064] The RLC layer's functions include the concatenation, segmentation, and reassembly of RLC SDUs. To ensure the various types of Quality of Service (QoS) required for 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 via Automatic Repeat Request (ARQ).

[0065] The RRC layer is defined only on the control plane. The RRC layer is associated with the configuration, reconfiguration, and release of radio bearers, and is responsible for the control of logical channels, transport channels, and PHY channels. RB represents the logical path provided by Layer 1 (PHY layer) and Layer 2 (MAC layer, RLC layer, and PDCP layer) for transmitting data between the UE and the network.

[0066] The Packet Data Convergence Protocol (PDCP) layer on the user plane performs functions including the transmission of user data and header compression and encryption. The PDCP layer on the user plane also performs functions related to the transmission of control plane data and encryption / integrity protection.

[0067] RB configuration refers to defining the characteristics of the radio protocol layer and channel to provide specific services and configuring various detailed parameters and operating methods. RBs can be divided into two types: Signaling RB (SRB) and Data RB (DRB). SRB is used as the channel for sending RRC messages in the control plane, while DRB is used as the channel for sending user data in the user plane.

[0068] If an RRC connection is established between the UE's RRC layer and the E-UTRAN's RRC layer, the UE is in RRC connected state. Otherwise, the UE is in RRC idle state.

[0069] Downlink transmission channels used for sending data from the network to the UE include a broadcast channel (BCH) for sending system information and a downlink shared channel (SCH) for sending user service or control messages. Service or control messages for downlink multicast or broadcast services can be sent via the downlink SCH, or via a separate downlink multicast channel (MCH). Furthermore, UL transmission channels used for sending data from the UE to the network include a random access channel (RACH) for sending initial control messages and an uplink shared channel (SCH) for sending user service or control messages.

[0070] The logical channels located above the transport channel and mapped to the transport channel include the Broadcast Control Channel (BCCH), Paging Control Channel (PCCH), Common Control Channel (CCCH), Multicast Control Channel (MCCH), and Multicast Service Channel (MTCH).

[0071] A physical channel comprises multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. A subframe comprises multiple OFDM symbols in the time domain. A Resource Allocation Unit (RB) is a unit of resource allocation that includes multiple OFDM symbols and multiple subcarriers. Additionally, each subframe may allocate specific subcarriers of a specific OFDM symbol (e.g., the first OFDM symbol) to the Physical Downlink Control Channel (PDCCH), i.e., the L1 / L2 control channel. The Transmission Time Interval (TTI) is the unit of time for subframe transmission.

[0072] The following section will describe the new radio access technology (New RAT, NR).

[0073] With an increasing number of communication devices requiring greater communication capacity, there is a need for improved mobile broadband communications compared to existing radio access technologies. Furthermore, massive machine-type communication (MTC) that provides various services by connecting numerous devices and multiple objects is also one of the main issues to be considered in next-generation communications. Additionally, communication system designs considering reliability / latency-sensitive services / UEs are being discussed. The introduction of next-generation radio access technologies considering enhanced mobile broadband (eMBB), massive MTC (mMTC), and ultra-reliable low latency communication (URLLC) is being discussed. In this disclosure, for convenience, such new technologies may be referred to as new radio access technologies (new RAT or NR).

[0074] Figure 4 An example of a system architecture for a next-generation radio access network (NG-RAN) using NR is presented.

[0075] Reference Figure 4 NG-RAN may include gNBs and / or eNBs that provide user plane and control plane protocol termination to the UE. Figure 4This example illustrates the case involving only the gNB. The gNB (eNB) connects via the Xn interface. Both the gNB and eNB connect to the 5G core network (5GC) via the NG interface. More specifically, the gNB and eNB connect 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.

[0076] Figure 5 This illustrates the functional division between NG-RAN and 5GC.

[0077] Reference Figure 5 The gNB can provide functions such as Inter-Cell Radio Resource Management (IRM), Radio Bearer Management (RB) control, Connection Mobility Control, Radio Access Control, Measurement Configuration and Provisioning, 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 can provide functions such as UE IP Address Allocation and PDU Session Control.

[0078] Figure 6 An example of a frame structure that can be applied to NR is shown.

[0079] Reference Figure 6 In NR, radio frames (hereinafter also referred to as frames) can be used for both UL transmission and downlink transmission. The frame length is 10ms, which can be defined as two 5ms half-frames (HF). HF can be defined as five 1ms subframes (SF). SF can be divided into one or more time slots, the number of time slots within an SF depending on the subcarrier spacing (SCS). Each time slot includes 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP). With normal CP, each time slot includes 14 symbols. With extended CP, each time slot includes 12 symbols. Here, symbols can include OFDM symbols (or CP-OFDM symbols) and single-carrier-FDMA (SC-FDMA) symbols (or Discrete Fourier Transform Spread Spectrum-OFDM (DFT-s-OFDM) symbols).

[0080] Table 1 below illustrates the subcarrier spacing configuration μ.

[0081] [Table 1]

[0082] Table 2 below illustrates the number of time slots (N) in a frame configured with subcarrier spacing μ. frame,μ slot The number of time slots in a subframe (N) subframe,μ slot ), the number of symbols in a time slot (N)slot symb )wait.

[0083] [Table 2]

[0084] exist Figure 6 The example shows the cases where μ = 0, 1, 2, and 3.

[0085] Table 2-1 below illustrates how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS when using extended CP.

[0086] [Table 2-1]

[0087] In NR systems, OFDM(A) parameter sets (e.g., SCS, CP length, etc.) can be configured differently across multiple cells merged into a single UE. Therefore, the (absolute time) duration of time resources (e.g., SF, time slots, or TTI) consisting of the same number of symbols (collectively referred to as Time Units (TUs) for simplicity) can be configured differently across merged cells.

[0088] Figure 7 The time slot structure is illustrated.

[0089] A time slot can include multiple symbols in the time domain. For example, in the case of normal CP, a time slot can include 14 symbols (or 7 symbols), but in the case of extended CP, a time slot can include 12 symbols (or 6 symbols). A carrier can include multiple subcarriers in the frequency domain. A resource block (RB) can be defined as multiple consecutive subcarriers in the frequency domain (e.g., 12 subcarriers). A bandwidth portion (BWP) can be defined as multiple consecutive (physical) resource blocks (P) RBs in the frequency domain, and a BWP can correspond to a set of parameters (e.g., SCS, CP length, etc.). A carrier can include up to N (e.g., 5) BWPs. Data communication can be performed through active BWPs, and only one BWP can be activated for a UE. In the resource grid, each element can be called a resource element (RE), and a complex symbol can be mapped to an RE.

[0090] The Physical Downlink Control Channel (PDCCH) may include one or more Control Channel Elements (CCEs), as illustrated in Table 3 below.

[0091] [Table 3]

[0092] In other words, PDCCH can be transmitted through resources including 1, 2, 4, 8, or 16 CCEs. Here, a CCE includes six Resource Element Groups (REGs), and a REG includes a resource block in the frequency domain and an orthogonal frequency division multiplexing (OFDM) symbol in the time domain.

[0093] The monitoring implies decoding each PDCCH candidate according to the downlink control information (DCI) format. The UE monitors a set of PDCCH candidates in one or more CORESETs (described below) on the active DL BWP of each active serving cell configured with PDCCH monitoring, based on the corresponding search space set.

[0094] In NR, a new unit called the Control Resource Set (CORESET) can be introduced. The UE can receive the PDCCH in the CORESET.

[0095] Figure 8 CORESET is shown as an example.

[0096] Reference Figure 8 CORESET includes N in the frequency domain. CORESET RB N in the resource block and time domain CORESET symb {1, 2, 3} symbols. N can be provided by the base station via higher-layer signaling. CORESET RB and N CORESET symb .like Figure 8 As illustrated, a CORESET may include multiple CCEs (or REGs).

[0097] The UE can attempt to detect PDCCH in units of 1, 2, 4, 8, or 16 CCEs in the CORESET. One or more CCEs that can be attempted for PDCCH detection can be referred to as PDCCH candidates.

[0098] Multiple CORESETs can be configured for a UE.

[0099] The control area of ​​the wireless communication system (e.g., LTE / LTE-A) of the relevant technology is configured on the entire system BW used by the base station (BS). All UEs except for some UEs that only support narrowband (e.g., eMTC / NB-IoT UEs) must be able to receive the wireless signals of the entire system BW of the BS in order to properly receive / decode the control information sent by the BS.

[0100] On the other hand, NR introduces the aforementioned CORESET. A CORESET is a radio resource used to transmit control information received by the UE, and it can utilize only a portion of the system bandwidth instead of the entire system bandwidth. The BS can allocate CORESETs to each UE and can transmit control information through the allocated CORESETs. In NR, the UE can receive control information from the BS without having to receive the entire system bandwidth.

[0101] CORESET can include UE-specific CORESET for sending UE-specific control information and public CORESET for sending common control information for all UEs.

[0102] On the other hand, depending on the application domain, NR may require high reliability. In this case, the target block error rate (BLER) of downlink control information (DCI) transmitted via a downlink control channel (e.g., physical downlink control channel (PDCCH)) can be significantly reduced compared to existing technologies. As an example of a method to meet the requirement of high reliability, the amount of content included in the DCI can be reduced and / or the amount of resources used when transmitting the DCI can be increased. In this case, resources may include at least one of resources in the time domain, resources in the frequency domain, resources in the code domain, and resources in the spatial domain.

[0103] The following technologies / features can be applied in NR.

[0104] <Self-contained subframe structure>

[0105] Figure 9 An example of a frame structure for a new radio access technology is shown.

[0106] In NR, such as Figure 9 As shown, the structure in which the control channel and data channel are time-division multiplexed within a TTI can be regarded as a frame structure in order to minimize the waiting time.

[0107] exist Figure 9 In the diagram, the shaded area represents the downlink control area, and the black area represents the uplink control area. Unmarked areas can be used to transmit downlink data (DL data) or uplink data (UL data). This structure is characterized by downlink (DL) and uplink (UL) transmissions occurring sequentially within a single subframe. DL data can be sent within a subframe, and UL ACK / NACK (acknowledgment / non-acknowledgment) can also be received. Therefore, the time required to retransmit data when errors occur is reduced, thus minimizing the latency for final data transmission.

[0108] In the subframe structure of data and control TDM, there may be time gaps required for the base station and UE to switch from transmit mode to receive mode or from receive mode to transmit mode. For this reason, some OFDM symbols during the DL to UL handover can be set as guard periods (GP) in the self-contained subframe structure.

[0109] Figure 10 An example of a self-contained time slot structure is shown.

[0110] In an NR system, a timeslot contains DL control channels, DL or UL data, and UL control channels. For example, the first N symbols in a timeslot (hereinafter, the DL control area) can be used to transmit DL control channels, and the last M symbols in the timeslot (hereinafter, the UL control area) can be used to transmit UL control channels. N and M are both integers greater than or equal to 0. The resource area (hereinafter, the data area) located between the DL control area and the UL control area can be used for either DL data transmission or UL data transmission. For example, consider the following configuration. The time slots are listed in chronological order.

[0111] 1. DL configuration only. 2. UL configuration only. 3. Hybrid UL-DL configuration, - DL area + GP (protection period) + UL control area - DL control area + GP + UL area.

[0112] DL regions: (i) DL data region, (ii) DL control region + DL data region

[0113] UL area: (i) UL data area, (ii) UL data area + UL control area.

[0114] In the DL control area, the PDCCH can be transmitted, and in the DL data area, the Physical Downlink Shared Channel (PDSCH) can be transmitted. In the UL control area, the Physical Uplink Control Channel (PUCCH) can be transmitted, and in the UL data area, the Physical Uplink Shared Channel (PUSCH) can be transmitted. Downlink control information (DCI), such as DL data scheduling information or UL data scheduling information, can be transmitted on the PDCCH. Uplink control information (UCI), such as ACK / NACK information, Channel State Information (CSI) information, or Scheduling Request (SR) for DL ​​data, can be transmitted on the PUCCH. GP provides time slots during the transition from TX mode to RX mode in the gNB and UE, or during the transition from RX mode to TX mode in the gNB and UE. Some symbols within a subframe during the transition from DL to UL can be configured as GP.

[0115] <Simulated Beamforming #1>

[0116] The wavelength is shortened to millimeter wave (mmW), thus allowing a large number of antenna elements to be installed in the same area. That is, the wavelength is 1 cm at 30 GHz, so a total of 100 antenna elements can be installed in a two-dimensional array in a 5×5 cm panel with a spacing of 0.5λ (wavelength). Therefore, a large number of antenna elements can be used in mmW to increase beamforming (BF) gain, thereby increasing coverage or improving throughput.

[0117] In this scenario, if transceiver units (TXRUs) are provided to adjust the transmit power and phase of each antenna element, independent beamforming for each frequency resource can be performed. However, installing TXRUs for all approximately 100 antenna elements is cost-inefficient. Therefore, a method using analog phase shifters to map a large number of antenna elements to a single TXRU and control the beam direction is considered. This analog beamforming can only form a beam direction across all frequency bands, thus failing to provide frequency-selective beamforming.

[0118] Hybrid beamforming (BF) with B TXRUs (less than Q antenna elements) can be considered an intermediate form between digital BF and analog BF. In this case, the number of beam directions that can be transmitted simultaneously is limited to B, although this number depends on the method of connecting the B TXRUs and Q antenna elements.

[0119] <Simulated Beamforming #2>

[0120] When multiple antennas are used in NR (Radio Frequency I / O), hybrid beamforming, a combination of digital and analog beamforming, emerges. Here, in analog beamforming (or RF beamforming), precoding (or combination) is performed at the RF end, thus achieving performance similar to digital beamforming while reducing the number of RF chains and D / A (or A / D) converters. For ease of description, the hybrid beamforming structure can be represented by N TXRUs and M physical antennas. Then, the digital beamforming of the L data layers transmitted at the transmitter can be represented by an N×L matrix. The converted N digital signals are then converted into analog signals via TXRUs and applied using an analog beamforming matrix represented by an M×N matrix.

[0121] System information for the NR system can be broadcast. In this case, analog beams belonging to different antenna panels can be transmitted simultaneously within a single symbol. A scheme is being discussed to introduce a beam RS (BRS) as a reference signal (RS) transmitted by applying a single analog beam (corresponding to a specific antenna panel) to measure the channel of each analog beam. The BRS can be defined for multiple antenna ports, and each antenna port of the BRS can correspond to a single analog beam. In this case, unlike the BRS, a synchronization signal or xPBCH can be transmitted by applying all analog beams within a group of analog beams so that it can be correctly received by any UE.

[0122] In NR, in the time domain, a synchronization signal block (SSB, or also known as the synchronization signal and physical broadcast channel (SS / PBCH)) can consist of four OFDM symbols indexed in ascending order from 0 to 3 within the synchronization signal block, and the PBCH associated with the primary synchronization signal (PSS), secondary synchronization signal (SSS), and demodulation reference signal (DMRS) can be mapped to symbols. As mentioned above, a synchronization signal block can also be represented by an SS / PBCH block.

[0123] In NR, since multiple synchronization signal blocks (SSBs) can be transmitted at different times and SSBs can be used to perform initial access (IA), serving cell measurements, etc., it is preferable to transmit the SSB first when its transmission time and resources overlap with those of other signals. For this purpose, the network can broadcast the transmission time and resource information of the SSBs or indicate them through UE-specific RRC signaling.

[0124] In NR, beams can be used for both transmitting and receiving. If the receiving performance of the currently serving beam degrades, a process called beam fault recovery (BFR) can be performed to search for a new beam.

[0125] Since BFR processing is not intended to declare errors or failures in the link between the network and the UE, it can be assumed that the connection to the current serving cell is preserved even if BFR processing is performed. During BFR processing, measurements of different beams configured by the network (which can be represented by CSI-RS port or Synchronization Signal Block (SSB) index) can be performed, and the optimal beam for the corresponding UE can be selected. The UE can perform BFR processing in a manner that associates RACH processing with the beam that produces good measurement results.

[0126] The Transmit Configuration Indicator (TCI) status will now be described. The TCI status can be configured for each CORESET of the control channel, and the parameters used to determine the RX beam of the UE can be determined based on the TCI status.

[0127] For each DL BWP of the serving cell, the UE can be configured for three or fewer CORESETs. Additionally, the UE can receive the following information for each CORESET.

[0128] 1) CORESET index p (e.g., one of 0 to 11, where the index of each CORESET can be uniquely determined within the BWP of a serving cell). 2) PDCCH DM-RS scrambling sequence initialization values, 3) The duration of CORESET in the time domain (which can be given in symbolic units). 4) Resource block set, 5) CCE to REG mapping parameters, 6) Antenna port quasi-co-addressing, which indicates the quasi-co-addressing (QCL) information of the DM-RS antenna ports used to receive PDCCH in each CORESET (from a set of antenna port quasi-co-addressings provided by a higher-layer parameter called "TCI-State"). 7) Indications for the presence of a Transmit Configuration Indicator (TCI) field in a specific DCI format sent by PDCCH in CORESET.

[0129] Quasi-co-located (QCL) will be described. If the characteristics of the channel through which a symbol at one antenna port is transmitted can be inferred from the characteristics of the channel through which a symbol at another antenna port is transmitted, then the two antenna ports are said to be quasi-co-located (QCL). For example, when two signals A and B are transmitted from the same transmit antenna array with the same / similar spatial filters applied, the two signals may experience the same / similar channel states. From the receiver's perspective, upon receiving one of the two signals, the other signal can be detected by using the channel characteristics of the received signal.

[0130] In this sense, when signals A and B are called quasi-co-located (QCL), it can mean that signals A and B experience similar channel conditions. Therefore, the channel information estimated for detecting signal A is also useful for detecting signal B. In this paper, channel conditions can be defined based on, for example, Doppler shift, Doppler spread, average delay, delay spread, and spatial reception parameters.

[0131] The “TCI-State” parameter associates one or two downlink reference signals with the corresponding QCL types (QCL types A, B, C, and D, see Table 4).

[0132] [Table 4]

[0133] Each “TCI-State” may include parameters for configuring the QCL relationship between one or two downlink reference signals and the DM-RS port of the PDSCH (or PDDCH) or the CSI-RS port of the CSI-RS resource.

[0134] Furthermore, for each DL BWP configured for a UE in a serving cell, the UE may provide 10 (or fewer) search space sets. For each search space set, the UE may provide at least one of the following information.

[0135] 1) Search space set index s (0 ≤ s < 40), 2) Correlation between CORESET p and search space set s, 3) PDCCH monitoring periodicity and PDCCH monitoring offset (slot units), 4) PDCCH monitoring pattern within a slot (e.g., indicating the first symbol of CORESET in the slot used for PDCCH monitoring), 5) Number of slots in which search space set s exists, 6) Number of PDCCH candidates at each CCE aggregation level, 7) Information indicating whether search space set s is CSS or USS.

[0136] In NR, CORESET #0 can be configured via PBCH (or UE-specific signaling used for handover, PSCell configuration, or BWP configuration). The search space (SS) set #0 configured via PBCH can monitor different offsets (e.g., slot offset, symbol offset) for each associated SSB. This may be necessary to minimize the search space timing monitored by the UE. Alternatively, this may be necessary to provide a beam scan control / data area capable of performing control / data transmission on a per-beam basis to persistently perform communication with the UE under optimal beam dynamic changes.

[0137] Figure 11 The physical channel and typical signal transmission are illustrated.

[0138] Reference Figure 11 In a wireless communication system, the UE receives information from the BS via the downlink (DL) and transmits information to the BS via the uplink (UL). The information transmitted / received by the BS and UE includes data and various control information, and various physical channels exist depending on the type / purpose of the information transmitted / received by the BS and UE.

[0139] When a UE is powered on again after a power outage or enters a new cell, it performs an initial cell search operation (S11) such as adjusting synchronization with the BS. For this purpose, the UE receives the primary synchronization channel (PSCH) and secondary synchronization channel (SSCH) from the BS to adjust synchronization with the BS and obtains information such as cell identity (ID). Additionally, the UE can receive the physical broadcast channel (PBCH) from the BS to obtain broadcast information within the cell. Furthermore, the UE can receive a downlink reference signal (DL RS) during the initial cell search step to identify the downlink channel state.

[0140] (Initial) Cell search is the process by which the UE obtains time and frequency synchronization with a cell and detects the cell ID of that cell. Cell search can be based on the cell's primary synchronization signal and secondary synchronization signal, and PBCH DMRS.

[0141] After completing the initial cell search, the UE can receive the Physical Downlink Control Channel (PDCCH) and its corresponding Physical Downlink Shared Channel (PDSCH) to obtain more specific system information (S12).

[0142] Subsequently, the UE can perform a random access procedure to complete access to the BS (S13 to S16). Specifically, the UE can send a preamble via the Physical Random Access Channel (PRACH) (S13) and receive a Random Access Response (RAR) to the preamble via the PDCCH and its corresponding PDSCH (S14). Afterward, the UE can send the Physical Uplink Shared Channel (PUSCH) using the scheduling information in the RAR (S15) and can perform a contention resolution procedure similar to that of the PDCCH and its corresponding PDSCH (which can be referred to as the process of receiving a contention resolution message) (S16).

[0143] After executing the above-mentioned procedures, the UE can perform PDCCH / PDSCH reception (S17) and PUSCH / Physical Uplink Control Channel (PUCCH) transmission (S18) as a typical uplink / downlink signal transmission process. The control information sent by the UE to the BS is called Uplink Control Information (UCI). UCI includes Hybrid Automatic Repeat and Request (HARQ) Acknowledgment (ACK) / Negative ACK (NACK), Scheduling Request (SR), Channel State Information (CSI), etc. CSI includes Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Rank Indicator (RI), etc. Typically, UCI is transmitted via PUCCH. However, when control information and data are to be transmitted simultaneously, UCI can be transmitted via PUSCH. Additionally, the UE can periodically transmit UCI via PUSCH based on network requests / instructions.

[0144] To ensure reasonable battery consumption when configuring bandwidth adaptation (BA), only one uplink BWP (bandwidth part) and one downlink BWP, or only one downlink / uplink BWP pair for each uplink carrier, can be activated at a time in the active serving cell, while all other BWPs configured in the UE are disabled. In the disabled BWPs, the UE does not monitor the PDCCH and does not perform transmissions on the PUCCH, PRACH, and UL-SCH.

[0145] For BA (Balance of Entity), the UE's RX and TX bandwidths are not necessarily as wide as the cell's bandwidth and can be adjusted. That is, the bandwidth can be changed (e.g., reduced for low-activity periods to save power), its position in the frequency domain can be moved (e.g., to increase scheduling flexibility), and the subcarrier spacing can be changed (e.g., to allow different services). A subset of the cell's entire bandwidth is called the Bandwidth Part (BWP), and BA is obtained by configuring the BWP for the UE and by notifying the UE of the currently active BWP within the configured BWP. When BA is configured, the UE only needs to monitor the PDCCH on one active BWP. That is, it does not need to monitor the PDCCH across the entire downlink frequency of the cell. A BWP inactivity timer (independent of the DRX inactivity timer mentioned above) is used to switch the active BWP to the default BWP. Specifically, the timer restarts when the PDCCH is successfully decoded, and switches to the default BWP when the timer expires.

[0146] The following section describes integrated access and backhaul link (IAB). For ease of explanation, the proposed approach is described based on the new RAT (NR) system, but the scope of systems applying the proposed approach can be extended beyond NR systems to other systems such as 3GPP LTE / LTE-A systems.

[0147] One of the potential technologies aimed at realizing future cellular network configuration scenarios and applications is a technology that supports wireless backhaul and relay links, which enables flexible and high-density deployment of NR cells without scaling up the transport network.

[0148] Compared to LTE, NR is expected to offer greater bandwidth alongside native deployments of massive MIMO or multi-beam systems (e.g., millimeter-wave spectrum), thus creating opportunities for the development and configuration of integrated access and backhaul links. This facilitates denser networks of self-backhauled NR cells by establishing multiple control and data channels / procedures defined as providing access to or to a UE. Such systems are called integrated access and backhaul links (IAB).

[0149] The following definitions are used in this disclosure.

[0150] - AC(x): Access link between node (x) and UE.

[0151] - BH(xy): Backhaul link between node (x) and node (y).

[0152] In this context, a node can refer to a donor gNB (DgNB) or a relay node (RN). Here, the DgNB or donor node can be a gNB that provides backhaul functionality for IAB nodes.

[0153] When relay node 1 and relay node 2 exist, and relay node 1 is connected to relay node 2 through a backhaul link and relays the data sent and received by 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.

[0154] The technical features described individually in one of the accompanying figures can be implemented individually or simultaneously.

[0155] The following figures are provided to illustrate the specific implementations described herein. Since the names of specific devices or signals / messages / fields described in the figures are provided as examples, the technical features herein are not limited to the specific names used in the following figures.

[0156] Now, we will describe full-duplex operation.

[0157] In 5G, new service types such as extended reality (XR), AI-based services, and autonomous vehicles are emerging. These services feature the ability to dynamically modify traffic in both the downlink (DL) and uplink (UL) directions and require low latency for the traffic to be sent, such as packets. Traffic will explode in 5G services to support these diverse new use cases.

[0158] Existing semi-static or dynamic TDD UL / DL configurations have limitations such as transmission time delay and inter-carrier interference. Existing FDD methods have limitations in terms of effective frequency resource utilization in the DL / UL direction. Therefore, to achieve low latency and efficient resource utilization in NR, the introduction of full-duplex operation within a single carrier is being discussed.

[0159] Figure 12 An example of how to apply full-duplex within an intra-carrier is shown.

[0160] Reference Figure 12 Full-duplex methods include, for example: Figure 12 As shown in (a), sub-band full-duplex (hereinafter referred to as sub-band full-duplex or SBFD) and as Figure 12 The spectrum shared full-duplex (hereinafter referred to as SSFD) shown in (b) is shown.

[0161] In the case of SBFD, DL and UL transmission and reception can be performed using different frequency resources within the same time resources on the same carrier (e.g., carrier #0). That is, different frequency resources can be used for DL ​​and UL for the same time resources.

[0162] In the case of SSFD, DL and UL transmission and reception can be performed using the same frequency resources or overlapping frequency resources within the same time resources on the same carrier (e.g., carrier #0). That is, for the same time resources, the same or overlapping frequency resources can be used in DL and UL.

[0163] This full-duplex (FD) operation can also be used in conjunction with existing half-duplex (HD) operations. For example, some time resources used for existing half-duplex-based TDD operations can be used for full-duplex operations. SBFD or SSFD operations can be performed on the time resources used for full-duplex operations.

[0164] Figure 13 An example is shown where time resources operating in half-duplex (HD) and time resources operating in full-duplex (FD) (e.g., SBFD or SSFD) coexist.

[0165] exist Figure 13In (a), some time resources used as SBFD operations are designated as SBFD, while time resources used as HD operations are designated as HD. Figure 13 In (b), some time resources used for SSFD operations are designated as SSFD, while time resources used for HD operations are designated as HD. The unit of time resource can be, for example, a time slot or a symbol. That is, Figure 13 (a) and (b) can be interpreted as examples of five time slots or five symbols existing on the time axis.

[0166] In the time resources used for SBFD operation, 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 and empty for both DL and UL. The guard subband may also be referred to by other terms, such as guard frequency resources or guard subcarriers.

[0167] In the time resources utilized for SSFD operation, the entire frequency resource can be used for both DL and UL. Alternatively, to reduce the impact of interference from other adjacent carriers (this can be called ACI (Adjacent Carrier Interference)), some frequency resources located at one or both ends of the carrier can be excluded from DL and / or UL. That is, one or both ends of the carrier can be used as an unused guard band (guard subband) for both DL and UL. Alternatively, to reduce ACI on UL reception, one or both ends of the carrier can be used solely for DL ​​transmission.

[0168] In this disclosure, the time slot resource used for HD operation is referred to as an HD time slot, and the time slot resource used for SBFD operation and the time slot resource used for SSFD operation are referred to as SBFD time slot and SSFD time slot, respectively. Furthermore, SBFD time slot and SSFD time slot can be collectively referred to as FD time slot.

[0169] In this disclosure, among all frequency resources used for FD operation, for convenience, frequency resources used for DL ​​operation can be referred to as DL subbands, and frequency resources used for UL operation can also be referred to as UL subbands.

[0170] In full-duplex operation, both the base station and the UE can perform full-duplex operation. That is, both the base station and the UE can simultaneously perform DL and UL transmission and reception using the same or different frequency resources at the same time.

[0171] Alternatively, only the base station can perform full-duplex operation, while the UE can perform half-duplex operation. The base station can simultaneously perform DL and UL transmission and reception using the same or different frequency resources at the same time, but the UE only performs DL reception or UL transmission in specific time resources. In this case, the base station achieves full-duplex operation by simultaneously performing DL transmission and UL reception with different UEs.

[0172] This disclosure is described under the assumption that the base station performs / supports full-duplex operation, but the UE performs / supports half-duplex operation. However, the contents of this disclosure may still apply even if both the base station and the UE perform / support full-duplex operation.

[0173] Based on the discussion above, this disclosure proposes a method for operating by falling back to TDD in the time resources of SBFD during full-duplex operation within the carrier.

[0174] In the following text, the term "network" can be interpreted as a base station or CU / DU. The term "UE (terminal)" can also be interpreted as a mobile terminal (MT) of an IAB node or an MT of a network control repeater (NCR-MT).

[0175] A. Characteristics of DL / UL time / frequency resources used for SBFD and SSFD operations

[0176] A cell (base station) can perform both DL transmission and UL reception in the same time resource within a FD scheme (e.g., SBFD or SSFD). For example, a base station can perform HD operation in a first time resource and FD operation in a second time resource (which can be a time resource other than the first time resource).

[0177] The first time resource for performing HD operation spans frequency resources encompassing the entire system bandwidth, performing either DL or UL operation. Within the first time resource for HD operation, the network performs DL operation via time resource 1-1 and UL operation via time resource 1-2. At this time, time resources 1-1 and 1-2 do not overlap.

[0178] In the second time resource for performing FD operation, the network performs DL operation using all or part of the frequency resources (first frequency resources) in the frequency resources of the system BW constituting the cell, and performs UL operation using all or part of the frequency resources (second frequency resources).

[0179] Figure 14 Examples of first time resources, second time resources, first frequency resources, and second frequency resources are shown.

[0180] Reference Figure 14In (a), the operation is performed as HD in the first time resource (denoted by A). In the second time resource (denoted by B), for example, it can be performed as SBFD. In the first time resource, the resource indicated by DL corresponds to the 1-1 time resource described above, and the resource indicated by UL corresponds to the 1-2 time resource described above.

[0181] Reference Figure 14 (b) In the second time resource, the frequency resource for DL ​​operation corresponds to the first frequency resource, and the frequency resource for UL operation corresponds to the second frequency resource.

[0182] Figure 15 Another example of first time resources, second time resources, first frequency resources, and second frequency resources is shown.

[0183] Reference Figure 15 In (a), in the first time resource (labeled A), the device operates as a half-duplex. In the second time resource (labeled B), the device may, for example, operate as an SSFD. In the first time resource, the resource labeled DL corresponds to the first time resource described above, and the resource labeled UL corresponds to the second time resource described above.

[0184] Reference Figure 15 (b) In the second time resource, the frequency resource for DL ​​and DL+UL operations corresponds to the first frequency resource described above, and the frequency resource for DL+UL operations corresponds to the second frequency resource described above.

[0185] The first frequency resource and / or the second frequency resource may have all or some of the following characteristics.

[0186] 1) During SBFD operation, the first and second frequency resources do not overlap. This is to ensure that DL and UL operations are performed using different frequency resources. At this time, there may be frequency resources that do not correspond to both the first and second frequency resources, and these frequency resources are referred to as guard subbands or guard frequency resources. These guard frequency resources may be needed to reduce interference from DL transmissions to UL reception. Guard frequency resources can be located between the first and second frequency resources.

[0187] 2) During SSFD operation, the first and second frequency resources may overlap. In this case, there may be frequency resources that do not correspond to both the first and second frequency resources, and these frequency resources are referred to as guard subbands or guard frequency resources. These guard frequency resources may be needed to reduce interference from DL transmissions on adjacent carriers to UL reception, and / or to reduce interference from DL transmissions to UL receptions on adjacent carriers.

[0188] 3) During SBFD operation, the second frequency resource can consist of contiguous frequency resources, while the first frequency resource can consist of discontinuous frequency resources. In this case, the first frequency resource can consist of multiple (e.g., two) discontinuous sets, and each set can consist of contiguous frequency resources. This is to reduce interference of DL transmissions on adjacent carriers to the UL resource by placing the second frequency resource used for DL ​​at the center of the frequency resources constituting the cell. Conversely, the first frequency resource can consist of contiguous frequency resources, while the second frequency resource can consist of discontinuous frequency resources. In this case, the second frequency resource can consist of multiple (e.g., two) discontinuous sets, and each set can consist of contiguous frequency resources. This is to reduce interference of DL transmissions on adjacent carriers to the UL resource by placing the second frequency resource used for DL ​​at the center of the frequency resources constituting the cell.

[0189] 4) When performing SSFD operation, the second frequency resource can consist of some frequency resources from the first frequency resource. In this case, the second frequency resource can be configured to have X fewer physical resource blocks (PRBs) than the first frequency resource on one or both sides of the carrier. This is to reduce interference from DL transmissions on adjacent carriers to UL reception.

[0190] The network determines the "first time resource" and "second time resource" as described above, as well as the "first frequency resource" and "second frequency resource", and provides some or part of the corresponding information to the UE.

[0191] For cell FD (SBFD and / or SSFD) operations, the UE can determine information about the time resources (hereinafter referred to as SBFD symbols) for the SBFD (and / or SSFD) operation. For this purpose, information about SBFD symbols can be set from the network to the UE.

[0192] When a specific time resource is set as a time resource operating in SBFD mode (SBFD symbol), both DL (Deep Length) and UL (Ultra Length) resources can exist within 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 perform only DL transmission. In SBFD resources, DL transmission is only performed within the DL subband. Therefore, even if there is no UL signal to be transmitted in the UL subband, only DL transmission can be performed within the DL subband.

[0193] In this scenario, if the base station has no UL transmissions to receive, even if the resources at a specific time are designated as SBFD symbols, it can consider performing DL transmissions both outside and within the DL subband to improve DL throughput. In other words, it can consider performing DL transmissions across the entire frequency band.

[0194] In other words, for resources identified as SBFD symbols, it is possible to consider reverting to TDD operation, where DL or UL operation is performed across the entire frequency band, rather than SBFD operation on the DL / UL subband.

[0195] In resources not designated as SBFD symbols, the UE can perform TDD (half-duplex) operations as existing UEs. That is, it can use all frequency resources of the cell to perform only DL or UL operations.

[0196] In the case of a rollback operation, the transition between SBFD and non-SBFD time resources can occur more frequently compared to the case where no rollback operation is performed. This can lead to increased operational complexity for both the base station and the UE, as well as increased overhead due to the transition periods.

[0197] In this disclosure, a time resource operated as SBFD or SBFD symbol can refer to a "second time resource". Additionally, in this disclosure, a time resource operated in TDD, a time resource operated in HD, a TDD symbol, or an HD symbol can refer to a "first time resource".

[0198] The DL subband mentioned in this disclosure may refer to a "first frequency resource". Additionally, the UL subband mentioned in this disclosure may refer to a "second frequency resource".

[0199] This disclosure assumes SBFD operation, where a cell simultaneously performs DL and UL using different frequency resources (e.g., subbands) within the same time resources. However, the contents of this disclosure also apply when a cell performs SSFD operation.

[0200] This disclosure may include the following UE operations.

[0201] When the UE performs DL reception in an SBFD symbol, i) the UE can use frequency resources within the DL subband to perform DL reception. The UE can use frequency resources within the DL subband of the DL BWP to perform DL reception. ii) The UE does not perform DL reception on frequency resources outside the DL subband. The UE does not use frequency resources outside the DL subband of the DL BWP to perform DL reception.

[0202] If the UE performs UL transmission on an SBFD symbol, then i) the UE can use frequency resources within the UL subband to perform UL transmission. The UE can use frequency resources within the UL subband of the UL BWP to perform UL transmission. ii) the UE does not perform UL transmission on frequency resources outside the UL subband. The UE does not use frequency resources outside the UL subband of the UL BWP to perform UL transmission.

[0203] Typically, a UE can perform DL reception within the DL subband and UL transmission within the UL subband in time resources when the cell is designated to operate in SBFD. However, if the gNB (base station) performs only DL transmission or UL reception in time resources when the cell is designated to operate in SBFD, or if necessary, it may be considered to perform DL transmission or UL reception across the entire frequency band (which can receive DL or UL scheduling).

[0204] In existing TDD carriers of NR, the base station performs only one of the DL or UL operations in a specific time resource. In this case, the base station always operates in DL during the time resource for transmitting SS / PBCH.

[0205] When the UE is operating in the existing TDD, the following assumptions are made for the symbols that transmit SS / PBCH.

[0206] 1) SS / PBCH transmit symbols cannot be configured as UL via TDD configuration (e.g., TDD-UL-DL-ConfigCommon and / or TDD-UL-DL-ConfigDedicated).

[0207] 2) SS / PBCH transmit symbols cannot be configured as UL via SFI (Slot Format Indicator) in DCI format 2_0.

[0208] 3) When SS / PBCH is transmitted in a flexible symbol configured via TDD (e.g., TDD-UL-DL-ConfigCommon and / or TDD-UL-DL-ConfigDedicated), if the UE's UL transmission overlaps with the corresponding SS / PBCH symbol, the corresponding UL transmission will not be performed. For example, if SRS transmission overlaps with an SS / PBCH symbol in a flexible symbol, SRS transmission will not be performed in the overlapping symbol.

[0209] Meanwhile, in FDR environments such as SBFD and SSFD, from the cell's (network, base station) perspective, both DL and UL resources can coexist in the same time resources. Therefore, the base station can transmit DL while simultaneously performing UL reception.

[0210] Therefore, even when the base station transmits SS / PBCH during the time resources of the cell performing FDR operation, it can still receive the UE's UL transmission at the same time as transmitting SS / PBCH.

[0211] Furthermore, according to current standards, a UE cannot perform UL transmission within the symbol resources for transmitting SS / PBCH in the network. In other words, a UE cannot perform FDR operations within the SS / PBCH transmission time resources.

[0212] When a specific time resource is configured to operate in SBFD, both DL and UL resources exist within the corresponding time resource. In this case, if there is no UL signal to be received by the base station in the corresponding time resource, the base station can perform only DL transmission. Within the SBFD resource, the base station's DL transmission is performed only within the DL subband. That is, even if there is no UL signal to be transmitted by the UE in the UL subband, DL transmission can still be performed only within the DL subband.

[0213] Even if a specific time resource is designated as an SBFD symbol, in the absence of UL transmissions from UEs to be received by the base station, it is possible to consider having the base station perform DL transmissions not only within but also outside the DL subband to improve DL throughput. In other words, it is possible to consider performing DL transmissions across the entire frequency band.

[0214] In other words, for resources identified as SBFD symbols, it may be considered to perform a fallback to TDD operations for performing DL or UL operations over the full band, rather than performing SBFD operations over the DL / UL subband.

[0215] In this disclosure, a time resource used as an SBFD or SBFD symbol operation can be referred to as a "second time resource". Furthermore, in this disclosure, a time resource used as a TDD operation, a time resource used as an HD operation, a TDD symbol, or an HD symbol can be referred to as a "first time resource".

[0216] With this in mind, this disclosure describes a method of operating by falling back to TDD in time resources that are SBFD operations during full-duplex operation within a carrier.

[0217] This disclosure assumes that SBFD operation describes a scenario where a cell simultaneously performs DL and UL using different frequency resources (e.g., subbands) within the same time resource. However, the content of this disclosure can also be applied to cases where a cell performs SSFD operation.

[0218] The base station can perform full-duplex operation and the UE can perform half-duplex operation, or the base station can perform half-duplex operation and the UE can perform full-duplex operation. Alternatively, both the base station and the UE can support full-duplex operation.

[0219] UEs that know they can perform full-duplex operation at a base station are collectively referred to as FD-aware UEs in the following text. UEs that know the base station can perform subband non-overlapping full-duplex (i.e., SBFD) operation are collectively referred to as SBFD-aware UEs. UEs that know the base station can perform spectrum sharing (or subband overlapping) full-duplex (i.e., SSFD) operation are referred to as SSFD-aware UEs.

[0220] When the base station supports both half-duplex and full-duplex operation, it can provide the UE with information about the resources (time or frequency, or both) that can be used to perform (or are expected to be performed, or are requested to be performed) half-duplex and full-duplex operation.

[0221] When a base station is capable of performing SSFD operation, in the case of a full-duplex base station, UL reception can be performed simultaneously on some or all frequency resources capable of DL transmission by the base station. That is, on some frequency resources, not only DL transmission / reception but also UL reception / transmission can be performed. In this case of SSFD, information about the frequency resources capable of SSFD can be delivered to the UE, and information about the time resources capable of SSFD can also be delivered to the UE.

[0222] In the case of a full-duplex UE, UL transmission can be performed simultaneously on some or all frequency resources that enable DL reception of the UE.

[0223] Although the following description describes a method for indicating information about time ( / frequency) resources used to perform SBFD, the method can also be used to indicate time ( / frequency) resources used to perform SSFD when the base station is capable of performing half-duplex and SSFD operations.

[0224] Typically, during the time resource for determining the cell as an SBFD operation, the UE can perform DL reception in the DL subband and UL transmission in the UL subband.

[0225] However, when determining the time resources for SBFD operation of a cell, if the base station is only performing DL transmission or UL reception (or as needed), it may be considered to perform regular TDD operation (where DL or UL scheduling can be received) for performing DL transmission or UL reception across the entire frequency band.

[0226] This disclosure describes how, during the time resource for determining a cell as an SBFD operation, the UE performs DL transmission not only in the DL subband but also in frequency resources outside the DL subband, and / or performs UL transmission not only in the UL subband but also in frequency resources outside the UL subband. For convenience, this operation may be referred to as a TDD backoff operation (or simply backoff operation) in this disclosure.

[0227] Figure 16 This example demonstrates a TDD rollback operation.

[0228] Reference Figure 16For example, suppose the UE determines time slots #0, #4, #5, and #9 as TDD (HD) time slots based on configuration information, and determines time slots #1, #2, #3, #6, #7, and #8 as SBFD time slots. In this case, specific SBFD time resources ( Figure 16 In time slot #6, a TDD backoff operation is performed that enables DL reception (capable of receiving DL scheduling) across the entire frequency band.

[0229] TDD rollback operations can specifically mean / include the following: 1) Dynamic SBFD and TDD switching A TDD rollback operation can mean the (semi-static) switching of time resources configured as SBFD to TDD time resources. That is, time resources configured as SBFD can be configured semi-statically, and the switching from SBFD to TDD time resources can be dynamically instructed. For example, SBFD time resources can be repeatedly configured at certain periods. Some of these SBFD time resources can be switched to TDD time resources (or non-SBFD time resources) through scheduling information such as DCI. In this case, the time resource performing the TDD rollback can mean the time resource that is (dynamically) switched to TDD time resources.

[0230] Alternatively, it can mean dynamically determining / judging / changing whether a particular time resource is operated as SBFD or TDD. That is, it can mean dynamically determining / judging / changing a time resource operated as SBFD and / or as TDD (i.e., non-SBFD). In this case, instructing TDD rollback operation resources / information can mean instructing (dynamic) information about time resources operated as SBFD and / or as TDD (i.e., non-SBFD).

[0231] 2) DL transmission permission in non-DL subband (or UL subband)

[0232] TDD backoff operation can mean allowing the UE to perform DL reception not only in DL subband frequency resources but also in "frequency resources outside the DL subband" (or "UL and / or guard subband resources") during the time period (semi-statically) configured for SBFD. In this case, the time resources for performing TDD backoff can mean that the UE performs DL reception even in "frequency resources outside the DL subband" (or "UL and / or guard subband resources"). That is, the time resources for performing TDD backoff can mean that the UE can perform DL reception in the entire frequency band.

[0233] 3) DL subband switching

[0234] TDD rollback operation can mean operating by changing the DL subband size and location to wideband during a time period (semi-statically) configured as SBFD. Changing the DL subband size and location to wideband can mean changing to full-frequency resources within the full band of the system BW or DL ​​BWP. That is, all frequency resources within the system band can be determined as DL subbands. In this case, since the DL subband is switched to full band, the UE can perform DL in all frequency resources. In this case, the time resource for performing TDD rollback can mean the time resource for operating by changing the DL subband size and location to wideband.

[0235] 4) UL sub-band switching

[0236] TDD rollback can mean performing the operation by changing the UL subband size to 0 for a period of time that is (semi-statically) configured as SBFD. Changing the UL subband size to 0 means changing all frequency resources within the entire system BW (band) or DL ​​BWP to DL subband. In other words, all frequency resources within the system band can be designated as DL subband. In this case, since the UL subband size is switched to 0, the UE can perform DL across all frequency resources. Therefore, the time resource for performing TDD rollback in this case can mean the time resource for operating by changing the UL subband size to 0.

[0237] The UE can determine whether a specific time resource is used for SBFD or TDD operations through explicit base station configuration or implicit determination for specific time resources.

[0238] In order to additionally support TDD rollback operations for time resources determined to be used for SBFD operations, the UE can determine the time resources for performing TDD rollback operations as follows.

[0239] In a cell performing SBFD operation, specific time resources (e.g., symbols, time slots) can be used for either SBFD operation or non-SBFD (i.e., traditional TDD) operation. When determining the symbols used for SBFD operation in a cell, the UE can operate as follows: 1) UL signal / channel transmission can be performed within the frequency resources configured / determined as UL sub-bands. And / or UL signal / channel transmission can be performed outside the frequency resources configured / determined as UL sub-bands.

[0240] 2) DL signal / channel reception can be performed within the frequency resources configured / determined as DL subbands, and / or not outside the frequency resources configured / determined as DL subbands.

[0241] 3) Do not transmit UL signals / channels within frequency resources configured / determined as protected subbands. And / or do not transmit DL signals / channels within frequency resources configured / determined as protected subbands.

[0242] Whether a cell performs SBFD / non-SBFD operation for a specific time resource can be dynamically indicated from the network to the UE via DCI. To this end, DCI signaling can be used to dynamically indicate SBFD / non-SBFD operation information for a cell targeting a specific time resource to the UE.

[0243] In this disclosure, for ease of description, the DCI that transmits SBFD / non-SBFD information as described above may be referred to as SBFD-DCI.

[0244] A. SBFD-DCI reception

[0245] The following section describes the configuration method for SBFD-DCI and the operation of a UE for receiving SBFD-DCI.

[0246] Method 1. SBFD-DCI can represent a scheduling DCI (i.e., DL grant, UL grant) sent for scheduling PDSCH / PUSCH. In this case, information about whether the cell performs SBFD / non-SBFD operations for a specific time resource can be included in the scheduling DCI and sent.

[0247] In this case, the UE can be informed of the cell's SBFD / non-SBFD operation information, which is applied to the transmission time resources of PDSCH / PUSCH scheduled through the corresponding DCI (e.g., the time resources indicated by the TDRA field in the DCI).

[0248] The UE can be informed of SBFD / non-SBFD operation information for such a cell in the time resource through a specific explicit field in the scheduling DCI, or implicitly through a previously existing field.

[0249] For example, a 1-bit field can be added to the scheduling DCI, and the corresponding field can be used to indicate whether the cell is performing an SBFD operation or a non-SBFD operation. For example, when instructing the UE to perform a non-SBFD operation through the corresponding field in a specific scheduling DCI, the UE determines that sending the time resources of PDSCH / PUSCH scheduled by the corresponding scheduling DCI is a non-SBFD operation.

[0250] Additionally / independently, the UE may be instructed with SBFD / non-SBFD operation information for a cell that transmits a PUCCH (i.e., a PUCCH that is sent after receiving a PDSCH that is scheduled by the corresponding DCI) with a transmission time resource including ACK / NACK information for PDSCH reception.

[0251] The UE can be informed of SBFD / non-SBFD operation information for such a cell in the time resource through a specific explicit field in the scheduling DCI, or implicitly through a previously existing field.

[0252] For example, a 1-bit field can be added to the scheduling DCI, and the corresponding field can be used to indicate whether the cell is performing an SBFD operation or a non-SBFD operation. In this case, for example, when instructing the UE to perform a non-SBFD operation through the corresponding field in a specific scheduling DCI, the UE determines that the time resources for sending the PUCCH scheduled by the corresponding scheduling DCI are for the non-SBFD operation.

[0253] The same indication information in the scheduling DCI can be used to jointly indicate information about PDSCH transmission resources and PUCCH transmission resources. When the SBFD / non-SBFD operation information of the cell is indicated to the UE through a specific explicit field in the scheduling DCI or implicitly indicated through a previously existing field, the UE can determine that the corresponding operation information is applied equally to the transmission time resources of the PDSCH and PUCCH scheduled by the corresponding DCI.

[0254] When using this method, instead of having to receive information about whether the cell performs dynamic SBFD / non-SBFD operations for each time resource, the UE only needs to receive information about whether the cell performs SBFD / non-SBFD operations for the actual signal / channel time resources for transmitting / receiving PDSCH, PUSCH, and PUCCH. Therefore, it has the advantage of reducing DCI reception overhead. Furthermore, since information about whether the cell performs dynamic SBFD / non-SBFD operations is received through existing scheduling DCI, it also has the advantage of reducing the overhead of designing separate DCI formats and receiving additional DCI.

[0255] Method 2. SBFD-DCI can be a UE-specific and / or UE-group-specific DCI independent of the scheduling DCI.

[0256] Method 2-1. SBFD-DCI is a UE group-specific DCI and can use the DCI format 2_0 previously used for slot format indication. In this case, information about whether the cell performs SBFD / non-SBFD operation for a specific time resource can be included in DCI format 2_0 and transmitted.

[0257] Therefore, a field indicating whether a cell performs SBFD / non-SBFD operations for a specific time resource can be added to the existing DCI format 2_0. When the relevant configuration for indicating SBFD / non-SBFD operation information of a cell via DCI is configured by higher-layer parameters, the UE can determine that such a field exists in DCI format 2_0.

[0258] Method 2-2. The SBFD-DCI can be a new dedicated DCI format used to indicate information about whether the cell performs SBFD / non-SBFD operations for a specific time resource. Such a DCI format can be transmitted by CRC scrambling with a dedicated RNTI (e.g., SBFD-RNTI) different from the C-RNTI. The UE can be configured with a dedicated RNTI value for receiving the SBFD-DCI from the network via higher-layer signaling.

[0259] When using this method, multiple UEs can receive information about whether a cell is performing dynamic SBFD / non-SBFD operations by receiving the same SBFD-DCI. Since SBFD / non-SBFD operation information for a specific cell with specific time resources is cell-specific, UEs receive the same information for the same time resources. Therefore, using this method has the following advantages: reducing signaling overhead by allowing UEs to receive cell SBFD / non-SBFD operation information through different or the same fields within the same DCI, rather than sending SBFD / non-SBFD operation information independently for each UE.

[0260] B. A method for indicating dynamic SBFD / non-SBFD information via SBFD-DCI

[0261] This section describes a method for dynamically instructing the UE on SBFD / non-SBFD operation information for a cell with specific time resources via SBFD-DCI.

[0262] Method B-1. A method for indicating SBFD / non-SBFD operation information for each unit of time resource.

[0263] The network can indicate SBFD / non-SBFD operation information for each time resource to the UE. With N time resources, SBFD / non-SBFD operation information is indicated for each time resource, thus enabling a total of N SBFD / non-SBFD operation information to be indicated. For example, the SBFD / non-SBFD operation information can be indicated as 1 bit, and can be indicated as 0 in the case of an SBFD operation and as 1 in the case of a non-SBFD operation. In this case, for example, the SBFD / non-SBFD operation information for N time resources can be a bitmap consisting of N bits. Using the bitmap information, the UE can determine whether the cell is performing SBFD or non-SBFD operation in the corresponding time resource based on whether the bit value corresponding to each time resource is 0 or 1.

[0264] [Configuration B-1-1] In this case, each time resource can be configured as follows.

[0265] Alternative Option 1. A time resource consists of a time slot. When indicating information about N time resources, N time resources can mean N consecutive or discontinuous time slots.

[0266] For example, N time resources can mean N time slots configured as SBFD. That is, N time resources starting from a specific time slot can mean N SBFD time slots in sequence, excluding non-SBFD time slots, starting from that specific time slot.

[0267] Alternative Option 2. A time resource consists of multiple (K) consecutive time slots or consecutive symbols. When indicating information about N time resources, the N time resources can consist of N consecutive or non-consecutive time resources. In this case, each time resource can consist of K consecutive time slots or symbols.

[0268] In this case, the value of K can be defined as a fixed value in the standard specification. Alternatively, the UE can configure the value of K from the network via higher-layer signaling.

[0269] Alternative option 3: Time slots / symbol resources constituting a time resource can be configured from the network. That is, information about the time slots / symbol resources constituting each time resource can be configured from the base station to the UE.

[0270] For example, in a time resource consisting of consecutive time slots / symbols, the UE can be configured from the network with information about the start time slot (or symbol) and time slot duration (or symbol duration) for each time resource. Thus, the UE can determine that the corresponding time resource comprises as many time resources as the time slot duration (or symbol duration) starting from the configured time slot (or symbol) position. In this case, the time slot duration (or symbol duration) may only include time slots / symbols configured as SBFD. That is, L time slot / symbol durations starting from a specific time slot / symbol can mean L sequentially SBFD time slots / symbols excluding non-SBFD time slots starting from that specific time slot / symbol.

[0271] When information about N time resources is provided, the UE can be configured from the network with information about the time slot / symbol resources that constitute each corresponding time resource for the N time resources.

[0272] SBFD-DCI can be used to indicate SBFD / non-SBFD operation information for N time resources to the UE through specific fields. Such fields can consist of N bits.

[0273] More specifically, the d-th field of the D fields constituting the SBFD-DCI can be used to indicate to the UE the target N. d Information on SBFD / non-SBFD operations for each time resource. Such a field can be defined by N. d It consists of 10 bits.

[0274] Figure 17 An example configuration of SBFD-DCI is shown.

[0275] Reference Figure 17 For example, D fields can exist in one SBFD-DCI.

[0276] The length of the d-th field in SBFD-DCI is equal to N. d At this point, for d = 0, 1, ..., D-1, N d All values ​​of can be equal to N.

[0277] Alternatively, N d The value of can be independent of the value of d.

[0278] The start bit position of the d-th field in SBFD-DCI is equal to S. d That is, the UE determines that the bit position starting from the d-th field in the SBFD-DCI is equal to S. d .

[0279] At this point, for d=0, 1, ..., D-1, in N dWhen all values ​​of S are equal to N, d The value can also be equal to N. d. Alternatively, N d The value of can be independent of the value of d.

[0280] [Configuration B-1-2] The UE receives only one DCI field within the SBFD-DCI and can use this field to indicate SBFD / non-SBFD operation information for each time resource. To determine the position of a field received by the UE among multiple fields in the DCI, in the case of the d-th field in the SBFD-DCI, the UE needs to know the position and length information of the d-th field in the DCI. For this purpose, the UE can be configured from the network with information about the fields it receives in the SBFD-DCI.

[0281] The UE can configure or determine N from the network. d The value of N d This is the length of the d-th field in SBFD-DCI. In this case, the UE determines that the length of the d-th field is equal to N. d .

[0282] The UE can configure N from the network via higher-layer signaling. d The value of N d It is the length value of the field it receives in SBFD-DCI.

[0283] Alternatively, if the UE is configured from the network with a number of time resources for indicating SBFD / non-SBFD operation information via SBFD-DCI, then the UE determines that the corresponding value is equal to N. d N d It is the length of the field in the DCI received by the UE.

[0284] The UE can configure or determine the S from the network. d The value is the start bit position of the d-th field in SBFD-DCI. In this case, the UE determines that the start bit position of the d-th field is equal to S. d .

[0285] The UE can configure S from the network via higher-layer signaling. d The value of S d It is the start bit position value of the field it receives in SBFD-DCI.

[0286] Using the information described above, the UE can determine the Sth from the DCI. d N starting with 1 bit d d bits constitute the d-th field received by the UE in SBFD-DCI.

[0287] The UE can receive multiple DCI fields within the SBFD-DCI, and thereby can be instructed with SBFD / non-SBFD operation information for each time resource. When the UE receives A fields in the SBFD-DCI, the UE needs to know the position and length information of each field in the DCI. For this purpose, the UE can be configured from the network with information about the fields it receives in the SBFD-DCI. For example, the UE can be configured with the length value and start bit position value for each of the A fields. For example, when the UE receives two DCI fields, to determine the position of the d1th field in the SBFD-DCI, N is configured as the length of the d1th field. d1 The value and S as the starting bit position of the d1th field d1 The value. And to determine the position of the d2th field, N can be configured as the length of the d2th field. d2 And S as the starting bit position of the d2th field d2 value.

[0288] If the UE receives multiple DCI fields in a single SBFD-DCI, each DCI field can indicate SBFD / non-SBFD operation information for independent / different time resources. That is, if the UE receives the d1th and d2th DCI fields, the d1th field can indicate information for N... d1 SBFD / non-SBFD operation information for each of the N time resources, and the d2 field can indicate the operation for other N. d2 SBFD / non-SBFD operation information for each time resource.

[0289] The UE uses the method described above to determine the fields it receives in SBFD-DCI, and can be instructed with SBFD / non-SBFD operation information for each time resource through the corresponding fields.

[0290] An example of the UE operation proposed in method B-1 is as follows.

[0291] The UE receives the SBFD-DCI from the network, and through specific fields in the SBFD-DCI, receives and determines the N associated with the corresponding field. d Each of the time resources indicates information about which operation the cell is performing in SBFD or non-SBFD (i.e., information about the operation plan).

[0292] The fields in the SBFD-DCI received by the UE can be determined by N d Composed of N bits. d Of the bits, each bit can be used for N. dEach of the time resources sequentially indicates one of the operating schemes: SBFD or non-SBFD. For example, if the nth bit is 0, the cell operates as SBFD in the nth time resource, and if the nth bit is 1, it means the cell operates as non-SBFD in the nth time resource (and vice versa).

[0293] N d A time resource can be N time resources starting from a specific time slot, which can be configured as shown in [Configuration B-1-1]. For example, N d A time resource can mean sequentially excluding N SBFD time slots that are not SBFD time slots, starting from a specific time slot.

[0294] UE can transfer data from the S-th generation of SBFD-DCI. d N starting with 1 bit d Each bit is determined as a field constituting the UE's received data. Therefore, the UE can receive S data from the network via higher-layer signaling. d and / or N d The value of .

[0295] Using method B-1 has the following advantages: when there are a large number of time resources, a small number of bits can be used to indicate information about all time resources. For example, in the case of 16 time resources, 4 bits are needed. Eight bits are used to notify the eight identifier (ID) values ​​of the time resource as a non-SBFD operation. On the other hand, 16 bits can be used when indicating SBFD / non-SBFD operation information for each time resource in a bitmap manner, which is advantageous in terms of overhead when a large number of time resources need to be indicated.

[0296] Method B-2. A method for indicating time resource information as a non-SBFD (or SBFD) operation.

[0297] Information about time resources for a cell operating as a non-SBFD (or as SBFD) operation can be indicated from the network to the UE. To do this, the UE can receive information about time resources in which the cell is operating as a non-SBFD operation by receiving SBFD-DCI. The UE can then determine whether the cell is operating as a non-SBFD operation in the indicated time resources.

[0298] [Configuration B-2-1]. At this time, the UE can be informed of the cell as a time resource for non-SBFD operation through a specific field in SBFD-DCI as follows.

[0299] Alternative Option 1: Through a specific field, the UE can be indicated with an ID value (i.e., Time Resource ID) that indicates a specific time resource. In this case, information about the time resource corresponding to each ID exists.

[0300] The UE can be configured from the network via higher-layer signaling with information about the ID corresponding to the time resource and / or the configuration information about the time resource corresponding to the ID.

[0301] In this case, a time resource can be configured as follows.

[0302] Alternative Option 1-1: A time resource consists of a single time slot. In this case, information regarding the time slot offset corresponding to the location of the time resource can be configured to define the time resource.

[0303] Alternative Option 1-2: A time resource consists of multiple (K) consecutive time slots or consecutive symbols. In this case, the value of K can be defined as a fixed value in the standard specification. Alternatively, the UE can configure the value of K from the network via higher-layer signaling. In this case, information about the time slot offset relative to the reference location of the corresponding time resource can be configured to define a specific time resource. Since a time resource is configured in units of K consecutive time slots or consecutive symbols, the time slot offset can be limited to a multiple of K.

[0304] Alternative options 1-3: Information about the time slot / symbol resources that constitute a time resource can be configured from the base station to the UE.

[0305] For example, when a time resource consists of consecutive time slots / symbols, the UE can be configured from the network with information about the start time slot (or start symbol) and time slot duration (or symbol duration) for each time resource. Thus, the UE can determine that the corresponding time resource comprises as many time intervals as the time slot duration (or symbol duration) starting from the configured time slot (or symbol) position. In this case, the time slot duration (or symbol duration) may only include time slots / symbols configured as SBFD. That is, L time slot / symbol durations starting from a specific time slot / symbol can mean L sequentially SBFD time slots / symbols excluding non-SBFD time slots starting from that specific time slot / symbol.

[0306] Alternative Option 2: Through a specific field, the UE can be indicated with an ID value (i.e., Time Resource Combination ID) that indicates a set / combination of one or more time resources. In this case, information about the set / combination of time resources corresponding to each ID can exist.

[0307] A time resource combination ID can be linked to multiple time resource IDs. That is, each time resource combination ID can be configured with an ID belonging to the corresponding time resource combination. In this case, each time resource can be configured as, for example, alternative 1-1, 1-2, or 1-3 of alternative 1.

[0308] Alternative Option 3: Information about the time slot / symbol resources that constitute a specific time resource can be indicated to the UE through a specific field.

[0309] In this case, a specific field in SBFD-DCI can be used to indicate to the UE the value corresponding to the start slot and slot duration.

[0310] For example, a specific field in the SBFD-DCI can indicate the value corresponding to the start time slot (the value corresponding to the time slot offset relative to the reference time slot), and another field can indicate the value corresponding to the time slot duration. As described above, the UE can determine whether the cell is operating as a non-SBFD cell in the time resources indicated by the SBFD-DCI.

[0311] [Configuration B-2-2]. The UE receives a DCI field within the SBFD-DCI, and this DCI field can be used to indicate the time resource set / combination for non-SBFD operations of the cell. To determine the position of the field received by the UE among multiple fields in the DCI, in the case that the UE receives the d-th field in the SBFD-DCI, the UE needs to know the position and length information of the d-th field in the DCI. For this purpose, the UE can be configured from the network with information about the fields it receives in the SBFD-DCI.

[0312] The UE can be configured or determined from the network. d The value of N d This is the length of the d-th field in SBFD-DCI. In this case, the UE determines that the length of the d-th field is equal to N. d .

[0313] The UE can be configured with N from the network via higher-layer signaling. d The value of N d It is the length value of the field it receives in SBFD-DCI.

[0314] Alternatively, when the number of time resources or time resource sets / combinations that can be indicated from the network via a specific field in SBFD-DCI (i.e., the number of time resources or time resource sets / combinations configured by the UE for non-SBFD operations in the cell, such as in configuration B-2-1) is referred to as "N_resource", then the UE determines N. dThe value is equal to log2(N_resource) or log2ceil(N_resource). The Ceil(x) function returns the smallest integer value greater than or equal to x.

[0315] The UE can configure or determine the S from the network. d The value is the start bit position of the d-th field in SBFD-DCI. In this case, the UE determines that the start bit position of the d-th field is equal to S. d .

[0316] Alternatively, the UE is instructed by the network via higher-layer signaling to have a d value, which indicates the order of fields received by the UE from the network. In this case, the UE determines S d The value is equal to d N d Alternatively, the UE determines the S d The value is equal to d log2(N_resource) or d log2ceil(N_resource).

[0317] Multiple fields in the SBFD-DCI can be used to indicate to the UE that a cell is operating on multiple time resources other than SBFD. For example, to indicate N time resources or N time resource sets / combinations for a cell operating on non-SBFD, N fields can be received, and each field can indicate one time resource set / combination. In this case, as in [Configuration B-2-1], each field can indicate to the UE the time resource set / combination for a cell operating on non-SBFD.

[0318] Therefore, the UE can be configured from the network with information about the fields it receives in SBFD-DCI. The UE can be configured with the length value and start bit position value for each of the A fields. For example, if the UE receives two DCI fields, to determine the position of the d1th field in SBFD-DCI, N is configured as the length of the d1th field. d1 The value and S as the starting bit position of the d1th field d1 The value. And to determine the position of the d2th field, N can be configured as the length of the d2th field. d2 And S as the starting bit position of the d2th field d2 value.

[0319] The UE uses the method described above to determine the fields it receives in SBFD-DCI, and can indicate information about the cell as a time resource for non-SBFD operations through the corresponding fields.

[0320] An example of the UE operation proposed in method B-2 is as follows.

[0321] The UE receives SBFD-DCI from the network, receives information about the time resources indicated in the corresponding field through specific fields in SBFD-DCI, and determines whether the cell is operating as a non-SBFD operation for the corresponding time resources.

[0322] The fields in the SBFD-DCI received by the UE are determined by N d It consists of 10 bits, and the corresponding bits indicate the ID of the time resource combination.

[0323] The UE is configured with multiple (N_resource) time resource combinations from the network. Each time resource combination corresponding to a specific ID consists of multiple time resources, and the UE is configured with the ID of the time resource constituting each time resource combination from the network. The UE is also configured with the time slot / symbol information constituting the time resource corresponding to each ID from the network.

[0324] UE will take the Sth from SBFD-DCI d N starting with 1 bit d Each bit is determined as a field constituting the UE's received data. Therefore, the UE receives (configured) S data from the network via higher-layer signaling. d The value of N. UE determines N. d The value is equal to log2(N_resource) or log2ceil(N_resource).

[0325] The indication via SBFD-DCI can be applied only to the network semi-statically indicating that the UE cell will be used as a symbol / slot resource for SBFD operation.

[0326] Although the above disclosure describes / proposes TDD rollback operations from the perspective of DL scheduling, the content and concepts of this disclosure can also be applied to TDD rollback operations from the perspective of UL scheduling.

[0327] The following describes a dynamic indication method for SBFD symbols that minimizes the transition point between SBFD symbols and non-SBFD symbols, with the application of dynamic SBFD.

[0328] The base station can perform full-duplex operation and the UE can perform half-duplex operation, or the base station can perform half-duplex operation and the UE can perform full-duplex operation. Alternatively, both the base station and the UE can support full-duplex operation.

[0329] A UE that knows it can perform full-duplex operation at a base station can be called a FD-aware UE. A UE that knows the base station can perform subband non-overlapping full-duplex (i.e., SBFD) operation can be called an SBFD-aware UE. A UE that knows the base station can perform spectrum sharing (or subband overlapping) full-duplex (i.e., SSFD) operation can be called an SSFD-aware UE.

[0330] When the base station supports both half-duplex and full-duplex operations, it can notify the UE of information about the time or frequency of resources that can perform (or expect or request to perform) half-duplex and full-duplex operations.

[0331] When the base station can perform SSFD operation, in the case of a full-duplex base station, UL reception can be performed simultaneously on some or all of the frequency resources capable of DL transmission by the base station. That is, on some frequency resources, not only DL transmission / reception but also UL reception / transmission can be performed. In this case, under SSFD, information about the frequency resources capable of SSFD can be delivered to the UE. Information about the time resources capable of SSFD can also be delivered to the UE.

[0332] In the case of a full-duplex UE, UL transmission can be performed simultaneously on some or all of the frequency resources capable of DL reception by the UE. In this disclosure, a UE performing half-duplex operation is referred to as an HD UE, and a UE capable of performing or performing full-duplex operation is referred to as an FD UE.

[0333] When a base station performs full-duplex operations such as SBFD and SSFD, SSFD and / or SBFD operations can be performed only for certain time / frequency resources. In cases where the UE is SBFD-aware and / or SSFD-aware, if the UE knows the time / frequency resources for the cell to perform SSFD and / or SBFD operations, the UE can perform operations differently based on the resources the cell uses for half-duplex (HD) operations, the resources used for SBFD operations, and the resources used for SSFD operations. For example, the UE can perform transmission and reception by determining the time / frequency resources for receiving DL signals / channels and / or transmitting UL signals / channels differently based on HD resources, SBFD resources, and SSFD resources.

[0334] This disclosure describes a method for determining the time / frequency resources for a cell to perform full-duplex operation after the UE has been configured from the base station with information for determining the time / frequency resources for performing full-duplex operation.

[0335] Based on the content of this disclosure, the base station and UE can operate as follows.

[0336] The base station performs a half-duplex operation in the time resources for HD operation, which involves performing only one of DL transmission or UL reception in all frequency resources constituting the corresponding cell. In the time resources for SBFD and SSFD operation, it performs a full-duplex operation, which involves performing DL transmission through the first frequency resource (i.e., DL subband resource) within the frequency resources constituting the corresponding cell and simultaneously performing UL reception through the second frequency resource (i.e., UL subband resource) within the frequency resources constituting the corresponding cell.

[0337] To this end, the base station determines / determines the time resources corresponding to the first time resource (i.e., the HD symbol) and the second time resource (i.e., the FD symbol), and sends configuration information about the first time resource (i.e., the HD symbol) and / or the second time resource (i.e., the FD symbol) to the UE. The FD symbol may include both SBFD symbols and SSFD symbols. More specifically, the base station determines / determines the time resources corresponding to the HD symbol, SBFD symbol, and / or SSFD symbol, and sends configuration information about the HD symbol, SBFD symbol, and / or SSFD symbol to the UE.

[0338] At this point, the DL subband resources and / or UL subband resources in the time resources used for SBFD operation and SSFD operation can be configured differently. In the time resources used for SBFD operation, the DL subband resources and UL subband resources are configured not to overlap. In the time resources used for SSFD operation, the DL subband resources and UL subband resources can be configured to overlap. The DL subband / UL subband resources can consist of some or all frequency resources of the system band.

[0339] The UE receives configuration information from the network regarding HD symbols, SBFD symbols, and / or SSFD symbols to determine their locations. In the HD symbol, the UE performs DL reception (UL transmission) using all frequency resources configured for UE operation of DL reception (UL transmission). In the SBFD and / or SSFD symbols, the UE performs DL reception (UL transmission) using DL subband (UL subband) resources that are the same as or limited to the frequency resources used for DL ​​reception (UL transmission) in the HD symbol. In this case, even if the UE is configured to perform DL reception (UL transmission) on frequency resources in the SBFD and / or SSFD symbols that do not correspond to DL subband resources (UL subband resources), the UE does not perform DL reception (UL transmission) on frequency resources that do not correspond to DL subband resources (UL subband resources).

[0340] The evolution of duplexes is described below.

[0341] 1. SBFD operation.

[0342] For SBFD operation on a TDD carrier, an SBFD subband can consist of a resource block (RB) or a group of consecutive RBs for the same transmission direction. An SBFD symbol can be defined as a symbol that represents a subband to be used by the base station for SBFD operation.

[0343] In a TDD carrier, the maximum number of UL subbands used for SBFD operation can be 1 (excluding conventional UL symbols). Such UL subbands can be located on one side of the carrier or in the middle of the carrier.

[0344] Whether SBFD operation is supported within an SSB symbol can be problematic. A UL subband can be configured within an SSB symbol. If an SBFD-aware UE is not allowed to transmit within an SSB symbol, but instead can be allowed to receive within the DL BWP of that SSB symbol, the negative impact on SSB detection and measurement can be avoided; however, UL performance may be degraded due to fewer UL transmission opportunities. If an SBFD-aware UE is allowed to transmit within an SSB symbol, the UE can perform UL transmissions only within the UL subband based on the base station's scheduling, configuration, measurement, or priority rules. If an SBFD-aware UE is requested to transmit within an SSB symbol, it may negatively impact SSB detection and measurement.

[0345] Whether a time slot can consist of both SBFD and non-SBFD symbols may also be a question. One motivation for allowing a time slot to consist of both SBFD and non-SBFD symbols is for compatibility with symbol-level TDD UL / DL configurations.

[0346] However, if transitions between SBFD and non-SBFD symbols occur frequently, implementation complexity increases, and pauses in transmission and reception may occur during transitions. At least in the case of semi-static SBFD, a potential limit on the maximum number of transition points between SBFD and non-SBFD symbols can be considered from the perspective of SBFD subband configuration to avoid frequent transitions between SBFD and non-SBFD symbols.

[0347] Within the TDD UL / DL pattern cycle, up to two transition points can be considered, such as 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. Depending on the base station / UE implementation and / or SBFD operation, a protection period between SBFD symbols and non-SBFD symbols may or may not be required on the base station and / or UE side.

[0348] In standard specifications, the time and frequency locations of subbands within a TDD carrier are not fixed. The base station may consider the following options regarding whether to notify the UE of the time and / or frequency locations of subbands used for SBFD operation, and at least in the RRC_CONNECTED state, option 4 may be given priority.

[0349] 1) SBFD operation option 1.

[0350] The time and frequency location of the subband used for SBFD operation is not notified to the UE. From the base station's perspective, UE operation can follow existing specifications without introducing new UE operations for SBFD.

[0351] 2) SBFD operation option 2.

[0352] The time and frequency location of the subband used for SBFD operation is not notified to the UE. UE operation for non-SBFD-aware UEs follows existing specifications. From RAN1's ​​perspective, new UE operations can be introduced for SBFD-aware UEs.

[0353] 3) SBFD operation option 3.

[0354] Only SBFD-aware UEs are notified of the time position of the subband used for SBFD operation. UE operations for non-SBFD-aware UEs follow existing specifications. From RAN1's ​​perspective, new UE operations for SBFD-aware UEs can be introduced based on the time position of the subband used for SBFD operation.

[0355] 4) SBFD operation option 4.

[0356] The time and frequency positions of the subband used for SBFD operation are both communicated to the SBFD-aware UE. UE operation for non-SBFD-aware UEs follows existing specifications. From RAN1's ​​perspective, new UE operations for SBFD-aware UEs can be introduced based on the time and frequency positions of the subband used for SBFD operation.

[0357] Of the four options, SBFD operation option 4 is used as an SBFD operation at least in the RRC_CONNECTED state.

[0358] Random access in SBFD symbols can be an issue. If random access in SBFD symbols for SBFD-aware UEs is allowed, it can potentially reduce the random access latency, reduce the PRACH collision probability, and improve the coverage of PRACH and Message 3 (Msg3). Transmitting PRACH and Message 3 in the UL sub-bands of SBFD symbols can cause CLI (Cross-Link Interference) between UEs. For the transmission of PRACH and Message 3 in the symbols configured as DL in TDD-UL-DL-ConfigCommon, random access in SBFD symbols can be allowed.

[0359] <Semi-static configuration of SBFD sub-bands>

[0360] To indicate the sub-band positions for SBFD operation, the sub-band time and frequency positions can be configured semi-statically. In the case of semi-static configuration of the time position of the sub-band for SBFD operation, the time position of the SBFD sub-band within a period can be configured explicitly.

[0361] In the case of semi-static configuration of the frequency position of the sub-band for SBFD operation, at least an explicit indication of the frequency position of the UL sub-band may be required. In the case of semi-static SBFD, the frequency positions of the DL sub-band and the guard band (if any) can be configured through one of the following two options.

[0362] Option 1: The frequency position of the DL sub-band can be configured explicitly. The guard band (if any) can be implicitly derived as the resource blocks that do not belong to the UL sub-band or the DL sub-band.

[0363] Option 2: The number of resource blocks for the guard band (if any) can be configured explicitly. The DL sub-band can be implicitly derived as the resource blocks that do not belong to the UL sub-band or the guard band.

[0364] In the case of semi-static SBFD, SBFD-aware UEs do not transmit UL channels / signals or receive DL channels / signals in the guard band identified by the UE.

[0365] In the case of semi-static configuration of the frequency position of the sub-band for SBFD operation, the frequency positions of the UL / DL sub-bands can refer to the Common Resource Block (CRB) grid. In the case of semi-static configuration of the sub-band position, the same sub-band frequency resources can be configured in different SBFD symbols.

[0366] <SBFD operation in symbols configured as DL in TDD-UL-DL-ConfigCommon>

[0367] In an SBFD symbol configured as DL in TDD-UL-DL-ConfigCommon, in the case of an SBFD-aware UE with a semi-statically configured UL subband, UL transmission within the UL subband is allowed in the SBFD symbol. UL transmission outside the UL subband is not allowed in the SBFD symbol. The frequency position of the DL subband is known to the SBFD-aware UE. The frequency position of the DL subband can be explicitly indicated or implicitly inferred. DL reception within the DL subband is allowed in the SBFD symbol. UL transmission occurs within the active UL BWP, and DL reception occurs within the active DL BWP.

[0368] For SBFD-aware UEs, whether to allow DL reception outside of the semi-statically configured DL subband in symbols configured as DL by TDD-UL-DL-ConfigCommon may be an issue. One of the following options can be considered.

[0369] Option 1 (Semi-static SBFD): Disallows DL reception outside of DL subbands configured in a semi-static manner.

[0370] Option 2 (Dynamic SBFD): Allows DL reception outside of the semi-statically configured DL subband.

[0371] <SbFFD operations in flexible symbols configured by TDD-UL-DL-ConfigCommon>

[0372] During SBFD operations in a flexible symbol configured by TDD-UL-DL-ConfigCommon, the following approaches may be considered.

[0373] Alternative Option 1: Allow UL transmission within the UL subband in the symbol. Disallow UL transmission outside the UL subband in the symbol. The frequency location of the DL subband is known to the SBFD-aware UE. Allow DL reception within the DL subband in the symbol.

[0374] Alternative Option 2: Allow UL transmission within the UL subband in the symbol. Resource blocks outside the UL subband can be used as DL (Dedicated Line) within the symbol from the base station's perspective, excluding UL or guard bands, and the transmission direction of all resource blocks is the same. The frequency location of the DL subband is known to the SBFD-aware UE. Allow DL reception within the DL subband in the symbol.

[0375] In both options, UL transmission in the symbol is within the active UL BWP, and DL reception is within the active DL BWP. For all resource blocks outside the UL subband, the UE cannot simultaneously use a single resource block for both DL and UL.

[0376] Whether DL reception outside of the semi-static DL subband and UL transmission outside of the semi-static UL subband are allowed in a symbol configured as flexible by TDD-UL-DL-ConfigCommon can be based on one of the following options.

[0377] Option 1 (Semi-static): Disallow DL reception outside of the DL subband in the semi-static configuration, and disallow UL transmission outside of the UL subband in the semi-static configuration.

[0378] Option 2 (Dynamic SBFD): Allows DL reception outside of the semi-static DL subband. Disallows UL transmission outside of the semi-static UL subband.

[0379] Option 3 (Dynamic SBFD): Allows DL reception outside of the semi-static DL subband. Allows UL transmission outside of the semi-static UL subband.

[0380] <Dynamic SBFD>

[0381] In the case of dynamic SBFD, the following considerations may be taken into account.

[0382] Compared to semi-static SBFD, dynamic SBFD can better adapt to UL / DL resource requirements based on UL / DL service load. Dynamic SBFD may increase the implementation complexity of the base station due to dynamic antenna / panel switching and filter / RF tuning, may cause resource loss due to transition time, may increase CLI between base stations, may increase scheduling complexity, and may be affected by additional specifications on semi-static SBFD.

[0383] When the UE supports dynamic SBFD, the implementation complexity of the UE may increase, and the CLI between UEs may also increase due to dynamic SBFD.

[0384] If dynamic SBFD is supported, the following options can be considered.

[0385] Option 1: Dynamic SBFD can be implemented by scheduling DL reception outside the DL subband of the semi-static SBFD or scheduling UL transmission outside the UL subband of the semi-static SBFD.

[0386] Option 2: Dynamic SBFD can be implemented through unscheduled DCI, and the unscheduled DCI indicates whether the symbol is an SBFD symbol.

[0387] Option 3: Dynamic SBFD is achieved through MAC-CE indicating whether the symbol is an SBFD symbol.

[0388] By introducing flexible subband types in Option 1, DL reception outside of the semi-static SBFD DL subband or UL transmission outside of the semi-static SBFD UL subband can be achieved.

[0389] In any option, the DL / UL sub-band size may not change dynamically.

[0390] The UE can be semi-statically configured with information about the location of SBFD symbol resources from the base station. These SBFD symbol resources are symbols used by the cell for SBFD operations. The UE can also be directly configured with the location of SBFD symbols from the network. And / or the UE can semi-statically configure symbols in the UL subband from the network to determine them as SBFD symbols. The method of semi-statically configuring / determining the location of SBFD symbols when the cell performs SBFD operations is called semi-static SBFD.

[0391] Additionally / independently, the UE can be dynamically configured from the base station with information about the location of SBFD symbol resources, which are symbols used by the cell for SBFD operation. The UE can determine symbols dynamically configured from the network as SBFD symbols. The method of dynamically configuring / determining the location of SBFD symbols when the cell performs SBFD operation is called dynamic SBFD. Furthermore, in the case of dynamic SBFD, only symbols that are semi-statically configured / determined as SBFD symbols can be dynamically switched to non-SBFD symbols. Alternatively, in the case of dynamic SBFD, symbols that are semi-statically configured / determined as SBFD symbols can be dynamically switched to non-SBFD symbols, and symbols that are semi-statically configured / determined as non-SBFD symbols can be dynamically switched to SBFD symbols.

[0392] In configuring / determining semi-static SBFD symbols, to minimize the transition points between SBFD and non-SBFD symbols, consecutive symbol resources within a specific period / interval can be configured / determined as SBFD symbols, and the remaining resources can be configured / determined as non-SBFD symbols. Such a period / interval can be the same as the period of the configuration information configured by TDD-UL-DL-ConfigCommon.

[0393] Simultaneously, when applying dynamic SBFD, a specific SBFD symbol can be switched to a non-SBFD symbol. Therefore, compared to methods based solely on semi-static SBFD symbol configuration operations, the number of transition points between SBFD and non-SBFD symbols may increase. For example, when configuring 5 time slots as DXXXU, there are 2 transition points within a period consisting of 5 time slots. The n letters (e.g., DXXXU) represent resource configuration information applied sequentially to n consecutive time slots, where D represents DL time slots (non-SBFD time slots), X represents SBFD time slots, and U represents UL time slots (non-SBFD time slots). On the other hand, if dynamic SBFD is applied, for example, the third time slot out of five can be switched to a non-SBFD symbol, and all five time slots can be configured as DXDXU. In this case, SBFD symbol resources exist discontinuously within the same period, and the existing two transition points increase to four. That is, due to the application of dynamic SBFD, the number of transition points between SBFD and non-SBFD symbols may increase compared to semi-static SBFD operations.

[0394] This disclosure describes a dynamic indication method for SBFD symbols that minimizes the transition point between SBFD symbols and non-SBFD symbols when applying dynamic SBFD.

[0395] In the following text, for ease of description, it is assumed that SBFD resources can be configured / determined at the symbol level. However, SBFD resources can also be configured / determined at the time slot level, and with this in mind, symbols in this disclosure can be replaced with time slots and interpreted accordingly.

[0396] This disclosure describes a method for determining SBFD symbols and non-SBFD symbols within the time resources for UE operation. However, this disclosure can be extended and interpreted / applied as follows.

[0397] This disclosure can be interpreted / applied as a method for the UE to determine SSFD and non-SBFD symbols within time resources. Therefore, the SBFD symbols in this disclosure can be replaced with SSFD symbols and interpreted / applied accordingly.

[0398] This disclosure can be extended and interpreted / applied as a method for a UE to determine a symbol that dynamically operates as an SSFD in a semi-statically configured / determined SBFD symbol set. Therefore, in this disclosure, the switching of a symbol to a non-SBFD for dynamic SBFD operation indication can be replaced and interpreted / applied as a symbol that dynamically switches to SSFD operation.

[0399] This disclosure can be extended and interpreted / applied as a method for a UE to determine a symbol that dynamically operates as an SBFD in a semi-statically configured / determined SSFD symbol set. Therefore, the semi-statically configured / determined SBFD symbols in this disclosure can be replaced with and interpreted / applied as semi-statically configured / determined SSFD symbols, and symbols indicating a switch to non-SBFD for dynamic SBFD operation can be replaced with symbols indicating a dynamic switch to SBFD operation and interpreted / applied.

[0400] Figure 18 Examples of semi-statically configured / deterministic SBFD symbols are shown.

[0401] Reference Figure 18 Within a period (or a specific time interval) P, the consecutive symbols from symbol #n to symbol #n+d are semi-statically configured / deterministic SBFD symbols. In this case, symbol #n is the transition point from a non-SBFD symbol to an SBFD symbol, and symbol #n+d+1 is the transition point from an SBFD symbol to a non-SBFD symbol.

[0402] The period P can represent the configuration period of a semi-static SBFD symbol. A semi-static SBFD symbol can be repeatedly applied with period P. Such period P can be the same as the period configured by TDD-UL-DL-ConfigCommon. For example, TDD-UL-DL-ConfigCommon can configure one TDD-UL-DL pattern or two TDD UL-DL patterns, and indicate the period of the TDD UL-DL pattern via "dl-UL-TransmissionPeriodicity". In this case, when only one TDD UL-DL pattern is configured, the period P (i.e., the configuration period of the semi-static SBFD symbol) can be the same as the TDD UL-DL pattern period configured by "dl-UL-TransmissionPeriodicity". When two TDD-UL-DL patterns are configured, the period P can be the same as the sum of the periods of the two TDD-UL-DL patterns configured by dl-UL-TransmissionPeriodicity in TDD-UL-DL-ConfigCommon.

[0403] When a cell supports dynamic SBFD, a symbol that has been semi-statically configured as an SBFD symbol can be switched to a non-SBFD symbol. Figure 18 In the example, all or some of the symbols in a continuous sequence from symbol #n to symbol #n+d can be switched to non-SBFD symbols.

[0404] In such Figure 18In the case of semi-static configuration / determination of SBFD symbols, there are at most two transition points between SBFD and non-SBFD symbols within period P. To support dynamic SBFD without increasing the number of such transition points, this disclosure proposes: Recommended method 1.

[0405] Suppose that within period P, consecutive symbols from symbol #n to symbol #n+d are configured as SBFD symbols, and the remaining symbols are configured as non-SBFD symbols. In this case, “a” consecutive SBFD symbols starting from symbol #n (i.e., “a” SBFD symbols that are temporally after symbol #n) can be (dynamically) switched to non-SBFD symbols. And / or “b” consecutive SBFD symbols starting from symbol #n+d in reverse temporal order (i.e., temporally before symbol #n+d) can be (dynamically) switched to non-SBFD symbols.

[0406] Additionally / independently, where it is permissible to switch symbols that will be semi-statically configured / determined as non-SBFD symbols to SBFD symbols, a' consecutive non-SBFD symbols starting from symbol #n-1 in reverse chronological order can be switched to SBFD symbols (dynamically). And / or b' consecutive non-SBFD symbols starting from symbol #n+d+1 can be switched to SBFD symbols (dynamically).

[0407] At this time, the period P can be the same as the period of the location (positioning) information of the SBFD symbol, which is semi-statically configured / determined by the UE (or the period configured by TDD-UL-DL-ConfigCommon).

[0408] Figure 19 An example is shown where some SBFD symbols existing within period P are switched (transformed) into non-SBFD symbols.

[0409] Reference Figure 19 (a) Multiple SBFD symbols can be configured (can exist) within the period interval P. In this case, "a" SBFD symbols starting from the first SBFD symbol (191) and "b" SBFD symbols in reverse time order starting from the last SBFD symbol (192) can be switched / transformed into non-SBFD symbols.

[0410] For example, when multiple SBFD symbols are symbols #n, #n+1, ..., #n+d, i) the symbols from symbol #n to symbol #n+a-1 and ii) the symbols from symbol #n+d-(b-1) to symbol #n+d can be switched / transformed into non-SBFD symbols.

[0411] According to this method, after the switch / transformation from SBFD symbol to non-SBFD symbol, the symbol is positioned in the order of non-SBFD symbol, SBFD symbol, and non-SBFD symbol within period P. Therefore, the transition between SBFD symbol and non-SBFD symbol occurs only twice within period P.

[0412] like Figure 19 As shown in (b), if a handover / transformation from an SBFD symbol to a non-SBFD symbol is performed in the middle of an SBFD symbol sequence, then after the handover / transformation, the symbols are positioned in the order of non-SBFD symbol, SBFD symbol, non-SBFD symbol, SBFD symbol, and non-SBFD symbol within period P. That is, the transition between SBFD and non-SBFD symbols occurs four times. This results in increased operational complexity for both the base station and the UE, as well as increased overhead due to the transition period.

[0413] Therefore, this disclosure proposes that, as Figure 19 The method in (a) switches (transforms) some SBFD symbols to non-SBFD symbols. See below for reference. Figure 19 Refers to Figure 19 (a)

[0414] The following describes the information indicated from the base station to the UE for the aforementioned dynamic SBFD operation, and the method by which the UE determines information about the symbol for switching to non-SBFD based on this information.

[0415] For dynamic SBFD operation, the UE can receive all or some of the following information from the network and can determine information about switching to a non-SBFD symbol based on such indications.

[0416] The aforementioned "a" (see above) can be used Figure 19 This information can be used to instruct the UE on the value corresponding to "a" or information from which the value of "a" can be interpreted / inferred. Specifically, such information may be as follows.

[0417] Alternative Option 1-1: The value of "a" can be used to indicate to the UE, i.e., the number of symbols switched to non-SBFD symbols. In this case, the UE can base it on the start point of the cycle (e.g., Figure 19 The symbol #0 (the same applies below) determines that “a” consecutive SBFD symbols starting from symbol #n are switched to non-SBFD symbols.

[0418] Alternative option 1-2: The UE can be instructed using a value corresponding to "a-1". In this case, the UE can determine that "a" consecutive SBFD symbols from symbol #n to symbol #n+a-1 are switched to non-SBFD symbols based on the start point of the cycle.

[0419] Alternative scheme 1-3. The UE can be instructed using a value corresponding to "n+a-1". In this case, the UE can determine that "a" consecutive SBFD symbols from symbol #n to symbol #n+a-1 are switched to non-SBFD symbols based on the start point of the cycle. The UE can determine that consecutive symbols from the start symbol of the cycle (i.e., symbol #0) to symbol #n+a-1 are used as non-SBFD symbols.

[0420] The aforementioned "b" (see above) can be used Figure 19 This information can be used to instruct the UE on the value corresponding to "b" or information from which the value of "b" can be interpreted / inferred. Specifically, such information can be as follows.

[0421] Alternative Option 2-1: The value of “b” can be used to indicate to the UE the number of symbols switched to non-SBFD symbols. In this case, the UE can determine, based on the start point of the cycle (e.g., symbol #0), that “b” consecutive SBFD symbols are switched to non-SBFD symbols in reverse chronological order starting from symbol #n+d.

[0422] Alternative option 2-2: The UE can be instructed using a value corresponding to "b-1". In this case, the UE can determine, based on the start point of the cycle, that "b" consecutive SBFD symbols from symbol #n+d-(b-1) to symbol #n+d are switched to non-SBFD symbols.

[0423] Alternative scheme 2-3: The UE can be instructed using a value corresponding to "n+d-(b-1)". In this case, the UE determines, based on the start point of the cycle, that "b" consecutive SBFD symbols from symbol #n+d-(b-1) to symbol #n+d are switched to non-SBFD symbols. That is, the UE determines that consecutive symbols from symbol #n+d-(b-1) to the last symbol of the cycle are used as non-SBFD symbols.

[0424] Based on this instruction, the UE determines that "a" consecutive SBFD symbols from symbol #n to symbol #n+a-1 among the symbols to be identified as SBFD symbols are used as non-SBFD symbols, and performs signal / channel transmission / reception. And / or the UE 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.

[0425] Additionally / independently, where it is permissible to dynamically switch symbols that are semi-statically configured / determined as non-SBFD symbols to SBFD symbols, for dynamic SBFD operations as described above, the UE may receive all or some of the following information from the network and determine information about switching to non-SBFD symbols based on such indications.

[0426] The UE can be indicated using a' or information corresponding to a', or information from which the value of a' can be interpreted / inferred. Specifically, such information can be as follows.

[0427] Alternative Option 1-1: The value of a' can be used to indicate to the UE, i.e., the number of symbols switched to SBFD symbols. In this case, the UE can determine, based on the start point of the cycle, that a' consecutive non-SBFD symbols starting from symbol #n-1 in reverse time order are switched to SBFD symbols.

[0428] Alternative scheme 1-2. The UE can be indicated using a value corresponding to a'-1. In this case, the UE can determine, based on the start point of the cycle, that a' consecutive non-SBFD symbols from symbol #n-1 to symbol #n-1-(a'-1) in reverse time order are switched to SBFD symbols.

[0429] Alternative options 1-3 can use the value corresponding to n-a' to indicate the UE. In this case, the UE can determine, based on the start point of the cycle, that a' consecutive non-SBFD symbols from symbol #n-1 to symbol #n-a' in reverse time order are switched to SBFD symbols.

[0430] The UE can be indicated using b' or information corresponding to b', or information from which the value of b' can be interpreted / inferred. Specifically, such information can be as follows.

[0431] Alternative option 2-1. The value of b' can be used to indicate to the UE, i.e., the number of symbols switched to SBFD symbols. In this case, the UE can determine that b' consecutive non-SBFD symbols starting from symbol #n+d+1 are switched to SBFD symbols based on the start point of the cycle.

[0432] Alternative option 2-2. The UE can be instructed using a value corresponding to b'-1. In this case, the UE can determine b' consecutive non-SBFD symbols from symbol #n+d+1 to symbol #n+d+1+(b'-1) to be switched to SBFD symbols based on the start point of the cycle.

[0433] Alternative option 2-3: The UE can be instructed using the value corresponding to n+d+b'. In this case, the UE can determine b' consecutive non-SBFD symbols from symbol #n+d+1 to symbol #n+d+b' being switched to SBFD symbols based on the start point of the cycle.

[0434] Based on such instructions, the UE determines that "a' consecutive non-SBFD symbols from symbol #n-a' to symbol #n-1" among the symbols that will be identified as non-SBFD symbols are used as SBFD symbols, and performs signal / channel transmission / reception. And / or the UE 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.

[0435] The following describes a method by which the UE receives indication information from the network via signaling for dynamic SBFD operation as described above.

[0436] The UE can be instructed from the network using the information described above via RRC signaling, MAC-CE signaling, and / or DCI signaling.

[0437] In this situation, signaling can be used to directly instruct the UE on the information applied by the UE from the network.

[0438] And / or multiple candidate values ​​applied by the UE for each of the information can be indicated from the network to the UE via RRC signaling, etc. Subsequently, information about the value actually applied by the UE among the multiple candidate values ​​can be indicated via MAC-CE signaling and / or DCI signaling.

[0439] And / or the network can indicate to the UE as much information as described above as multiple configuration sets. As mentioned above, each configuration set can include multiple pieces of information for determining the location of the symbol to be switched to a non-SBFD. Such configuration sets can be indicated via RRC signaling, etc. Then, information about the configuration set actually applied by the UE among the multiple configuration sets can be indicated to the UE from the network via MAC-CE signaling and / or DCI signaling.

[0440] The following describes a method for the UE to determine the time interval for applying the indication information for dynamic SBFD operation as described above.

[0441] The aforementioned indication may be applied only during a continuous time interval or during a number of time intervals based on the time point at which the UE receives the indication. More specifically, such an indication may be applied during the time interval as follows.

[0442] Alternative option a. It can be applied continuously and periodically from the start of the most recent period after the time the UE receives such indication information. More specifically, if the UE receives such indication information in time slot #m, it can be applied periodically from the start of the most recent period after time slot #m, time slot #m+1, or time slot #m+z. This indication can be applied continuously until the UE receives and applies the corresponding next indication. Furthermore, the period for applying this indication information can be the same as P or Q. In this case, specifically, Q can be the same as q. P is the same. That is, when the period of the semi-static SBFD configuration information is P, the instruction information for the action of dynamic SBFD can also be applied periodically once every q periods of the semi-static SBFD configuration information. Typically, such a value of q can always be equal to 1.

[0443] Alternative option b. It can be applied once within the nearest period after the time point at which the UE receives such indication information. More specifically, if the UE receives such indication information in time slot #m, such information can be applied to the nearest period after time slot #m, time slot #m+1, or time slot #m+z.

[0444] Alternative option c. It can be applied once within a specific period / interval after the time point at which the UE receives such indication information. More specifically, if the UE receives such indication information in time slot #m, such information can be applied to the Kth period based on the most recent period after time slot #m, time slot #m+1, or time slot #m+z.

[0445] Alternative option d. It can be applied during a specific time interval after the point in time when the UE receives such indication information. More specifically, if the UE receives such indication information in time slot #m, such information can be applied to the Kth to K+Lth cycles based on the most recent cycle after time slot #m, time slot #m+1, or time slot #m+z. Typically, such a value of K can always be equal to 0.

[0446] The aforementioned period can refer to the periodic interval of the SBFD symbol location information, which is semi-statically configured / determined by the UE.

[0447] For the operations described above, the UE can be configured with a value corresponding to z from the network via RRC and / or DCI signaling.

[0448] Additionally / independently, for the operations described above, the UE can be configured from the network with a value corresponding to Q or a value corresponding to q via RRC, MAC-CE, and / or DCI signaling.

[0449] Additionally / independently, for the operations described above, the UE can be configured with a value corresponding to K from the network via RRC, MAC-CE, and / or DCI signaling.

[0450] Additionally / independently, for the operations described above, the UE can be configured with a value corresponding to L from the network via RRC, MAC-CE, and / or DCI signaling.

[0451] As another method for determining the time interval for applying such indication, the UE can be configured with indication information for the operation of dynamic SBFD as described above from the network via RRC signaling and / or MAC-CE signaling, and thereafter, the UE can be indicated by activation / deactivation information of the indication information configured from the network via MAC-CE signaling and / or DCI signaling.

[0452] When the UE is indicated to have activation information from the network, the UE can periodically apply the configured indication information to the operation of dynamic SBFD, as in alternative scheme a.

[0453] When the UE is indicated by the network to have deactivation information, the UE can stop applying the indication information to the operation of dynamic SBFD.

[0454] Additionally, multiple sets of indication information for dynamic SBFD operation can be configured from the network to the UE via RRC signaling and / or MAC-CE signaling, and thereafter, the index of the configuration information set for which the activation / deactivation information has been applied can be indicated from the network to the UE along with the activation / deactivation information of the configured indication information via MAC-CE signaling and / or DCI signaling.

[0455] Additionally, when indicating activation information to the UE, the Q or q value used to determine the period of the application indication information can be indicated together. Alternatively, the Q or q value used to determine the period of the application indication information can be configured by including it in indication information for dynamic SBFD operation configured for the UE from the network via RRC signaling and / or MAC-CE signaling, etc.

[0456] Below, a method will be described for indicating with multiple sets of indication information for dynamic SBFD operation as described above and applying each set to a different time interval.

[0457] In addition to the method described above for the UE to determine the time interval to which the indication information for dynamic SBFD operation is applied, the UE can be indicated from the network with up to multiple sets of indication information as described above. In this case, different configuration sets can be applied to different periods. Such multiple configuration sets can be indicated by the same signaling (e.g., via the same DCI).

[0458] More specifically, the network can indicate M configuration sets to the UE. The UE can then determine that these configuration sets are applied sequentially over M consecutive periods. For example, the m-th configuration set can be applied to the m-th period.

[0459] Alternatively, the UE may be instructed with M configuration sets, and for each configuration set, the L value applied to the corresponding configuration set may be jointly indicated. In this case, when the UE receives the L value applied to the corresponding configuration set for each configuration set, the UE may apply the corresponding configuration set to the Lth cycle.

[0460] Recommended method 2.

[0461] The proposed method 2 is a method in which all SBFD symbols existing within a specific time interval (e.g., period P) are (dynamically) switched to non-SBFD symbols when consecutive symbols are configured as SBFD symbols within a period P and the remaining symbols are configured as non-SBFD symbols.

[0462] At this time, the period P can be the same as the period of the SBFD symbol location information that is semi-statically configured / determined by the UE (or the period configured by TDD-UL-DL-ConfigCommon).

[0463] Figure 20 An example is given of a method for switching some of the SBFD symbols to non-SBFD symbols according to suggested method 2.

[0464] Reference Figure 20 In each of the multiple periods with period P (e.g., period #p-1, period #p, period #p+1, period #p+2), some consecutive symbols within each period are configured as SBFD symbols, and the remaining symbols are configured as non-SBFD symbols. Then, by a specific instruction, all SBFD symbols existing within a time interval corresponding to a specific period (e.g., period #p) among the multiple periods can be switched / transformed into non-SBFD symbols.

[0465] In other words, when it is necessary to switch some of the SBFD symbols configured in multiple cycles to non-SBFD symbols, all SBFD symbols in a specific cycle (e.g., cycle #p) within the multiple cycles will be switched / transformed to non-SBFD symbols.

[0466] This method has the advantages of low signaling overhead and reduced operational complexity.

[0467] The following describes a method for the UE to receive information from the base station for the operation of the dynamic SBFD as described above and to determine information about the symbol for switching to a non-SBFD.

[0468] For dynamic SBFD operations as described above, the UE can be instructed using all or some of the following information from the network, and information regarding the symbol for switching to non-SBFD can be determined based on such instructions.

[0469] The UE can be indicated to the position of the period in which the handover to a non-SBFD symbol is performed, i.e., the p-value as the index value of the period, or information from which the corresponding value can be interpreted / inferred.

[0470] The length of the period Q, which can be interpreted / inferred from the information about the handover to a non-SBFD symbol, can be used to instruct the UE. Typically, such a Q value can be equal to q. P. For the operations described above, the UE can be configured from the network with a value corresponding to Q or a value corresponding to q. Or typically, such a q value can always be equal to 1 (i.e., Q can be equal to P, which is the period of the semi-statically configured / determined SBFD symbol location information).

[0471] Based on this instruction, the UE determines that the SBFD symbols present in period #p among the symbols indicated as SBFD symbols are used as non-SBFD symbols, and can perform signal / channel transmission / reception.

[0472] The following describes a method by which the UE receives instruction information from the network via signaling for operation of the dynamic SBFD as described above.

[0473] The information described above can be indicated from the network to the UE via RRC signaling, MAC-CE signaling, and / or DCI signaling. In this case, the information applied by the UE can be directly indicated from the network to the UE via signaling.

[0474] And / or multiple candidate values ​​applied to each UE in the information can be indicated from the network to the UE via RRC signaling, etc. Subsequently, information about the value actually applied by the UE among the multiple candidate values ​​can be indicated via MAC-CE signaling and / or DCI signaling.

[0475] The following describes a method for determining the time resource corresponding to period #p when it is determined, through indication information for dynamic SBFD operation as described above, that an SBFD symbol existing within period #p is used as a non-SBFD symbol.

[0476] As described above, the UE can determine the position of period #p based on the time point at which the UE receives the instruction.

[0477] Alternative approach a. The position of period #p can be determined based on the start point of the most recent period after the time the UE receives such indication information. More specifically, if the UE receives such indication information in time slot #m, such information can be applied to the p-th period based on the start point of the most recent period after time slot #m, time slot #m+1, or time slot #m+z. In this case, each period can be equal to Q.

[0478] Alternative option b. The position of period #p can be determined based on the start point of the most recent set of periods after the time point at which the UE receives such indication information. If the UE receives such indication information in time slot #m, such information can be applied to the p-th period based on the start point of the most recent set of periods after time slot #m, time slot #m+1, or time slot #m+z. A set of periods refers to a time interval comprising multiple consecutive periods, and a set of periods can consist of Z periods. When the length of each period is equal to Q, the length of each set of periods is equal to Z. Q, and such periodic sets can exist periodically.

[0479] Alternative option c. The position of period #p can be periodically determined based on the start point of the most recent set of periods after the time point at which the UE receives such indication information. If the UE receives such indication information in time slot #m, such information can be applied to the p-th period based on the start point of the most recent set of periods after time slot #m, time slot #m+1, or time slot #m+z, and such indication can be applied periodically every Z periods. A set of periods refers to a time interval comprising multiple consecutive periods, and a set of periods can consist of Z periods. When the length of each period is equal to Q, the length of each set of periods is equal to Z. Q, and such periodic sets can exist periodically.

[0480] The aforementioned period can refer to the periodic interval of the SBFD symbol location information configured semi-statically for the UE.

[0481] For the operations described above, the UE can be configured with a value corresponding to Z from the network via RRC, MAC-CE, and / or DCI signaling. The value of Q.

[0482] As another method for determining the location of the period #p for applying such an indication, indication information for the operation of dynamic SBFD as described above can be configured from the network to the UE via RRC signaling and / or MAC-CE signaling, and thereafter, activation / deactivation information of the configured indication information can be indicated from the network to the UE via MAC-CE signaling and / or DCI signaling.

[0483] When the UE is indicated by activation information from the network, the UE can periodically apply the configured indication information to the operation of dynamic SBFD, as in alternative scheme c.

[0484] When the UE is instructed by the deactivation information from the network, the UE can stop applying the instruction information for the operation of dynamic SBFD.

[0485] Additionally, multiple sets of indication information for dynamic SBFD operation can be configured from the network to the UE via RRC signaling and / or MAC-CE signaling, and thereafter, the index of the configuration information set for which the activation / deactivation information has been applied can be indicated from the network to the UE along with the activation / deactivation information of the configured indication information via MAC-CE signaling and / or DCI signaling.

[0486] Additionally, when indicating activation information to the UE, Z or Z0 can be indicated together with the period used to determine the application indication information. Q value. Alternatively, Z or Z0 is used to determine the period of the application indication information. The Q value can be configured by including it in the indication information for the operation of dynamic SBFD configured for the UE from the network via RRC signaling and / or MAC-CE signaling.

[0487] The following describes a method for indicating multiple pieces of information regarding the p-value of the dynamic SBFD operation as described above. Such a p-value represents the index of the cycle, but can also be replaced by other information capable of interpreting / inferring the location information of the cycle to which a switch to a non-SBFD is performed. Information regarding these multiple p-values ​​can be indicated by the same signaling (e.g., via the same DCI).

[0488] Multiple p-values ​​can be independently indicated from the network to the UE. When such information is signaled via DCI, multiple p-values ​​can be indicated through different DCIs. Alternatively, multiple p-values ​​can be indicated through the same DCI, but through fields that are independent of each other.

[0489] Alternatively, multiple p-values ​​can be combined and represented as a single message. When such information is signaled via DCI, multiple p-values ​​can be indicated to the UE from the network through the same field within the same DCI.

[0490] For example, multiple p values ​​can be indicated in a bitmap format. The UE can receive a bitmap consisting of Z bits from the network and can interpret / determine the position of the bit that indicates 1 (or 0) as the value of p. For example, if the 2nd and 4th bits of the 5 bits constituting the bitmap are indicated as 1, the UE can determine that two p values ​​are indicated and that these two p values ​​are 2 and 4.

[0491] Alternatively, when multiple p-values ​​constitute a set, the UE can be configured from the network with information about the multiple sets and the multiple p-values ​​constituting each set. Simultaneously, the UE can be configured from the network with an index value corresponding to each set. Then, the index value corresponding to the specific set applied by the UE can be indicated to the UE from the network via signaling such as MAC-CE and / or DCI.

[0492] For the operations described above, the UE can be configured with a value corresponding to Z from the network via RRC and / or DCI signaling.

[0493] When multiple p values ​​(i.e., p1, p2, ..., pM) are indicated to the UE via the indication described above, the UE can determine that the SBFD symbol present in the time interval corresponding to the period #p1, period #p2, ... and period #pM is switched / transformed into a non-SBFD symbol.

[0494] Figure 21 An example of the operation method of a UE in a wireless communication system is given.

[0495] Reference Figure 21 The UE receives first information for configuring periodic full-duplex (FD) time resources (S211).

[0496] The UE receives a second message notifying non-FD time resources, wherein the second message is information for switching some of the FD time resources to non-FD time resources in units of a specific interval (e.g., P) (S212).

[0497] For example, the second information may use a specific time interval, referred to as P, as the unit of indication. In the case of multiple consecutive intervals, each with a time length of P, the second information may be used to indicate or notify that some or all of the SBFD time resources within a specific interval will be switched to non-SBFD time resources for that particular interval. In this sense, the second information may be referred to as information notifying resource switching in units of a specific interval (P).

[0498] For example, a specific interval can be a TDD (Time Division Duplex) period provided by TDD configuration information or a time interval equal to a multiple of the TDD period. The TDD configuration information can be, for example, a “TDD-UL-DL-ConfigCommon” that determines the cell-specific uplink / downlink TDD configuration. Such TDD configuration information can inform the period of the downlink-uplink pattern (also called the uplink-downlink pattern), which can be referred to as the TDD period. And the information informing the TDD period can be referred to as TDD period information.

[0499] The UE performs transmission and reception operations based on the first information and the second information (S213).

[0500] For example, FD time resources can be multiple consecutive symbols within a specific interval P, such as... Figure 18 and Figure 19 As described in [the document]. At this time, the time resources in the FD time resources that switch to non-FD time resources can include N1 (N1 is a natural number) consecutive symbols starting from the first symbol among multiple symbols and N2 (N2 is a natural number) consecutive symbols starting from the last symbol among multiple symbols.

[0501] The above has been referenced Figure 19 An example of non-SBFD time resources is described. That is, multiple SBFD symbols can exist within a period interval P, and in this case, the 'a' (corresponding to N1) SBFD symbols starting from the first SBFD symbol (191) and the 'b' (corresponding to N2) SBFD symbols starting from the last SBFD symbol (192) in reverse time order can be switched / transformed into non-SBFD symbols.

[0502] The second information may include information related to N1 and information related to N2.

[0503] According to the implementation, the UE can be configured with candidate values ​​for N1 and N2 via Radio Resource Control (RRC) messages, and can receive information indicating at least one of the candidate values ​​via at least one of Media Access Control (MAC) control element (CE) and Downlink Control Information (DCI).

[0504] For example, a first list of candidate values ​​for N1 and a second list of candidate values ​​for N2 can be configured via an RRC message, which is a higher-level 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 m1-th value (m1 is any natural number from 1 to M1) in the first list and information indicating the m2-th value (m2 is any natural number from 1 to M2) in the second list can be provided via at least one of MAC CE and DCI.

[0505] According to the implementation, a list of multiple combinations of candidate values ​​for N1 and N2 can be configured via RRC messages, and information indicating at least one combination of candidate values ​​can be received via at least one of MAC CE and DCI.

[0506] Switching some FD time resources to non-FD time resources can be performed in units of the aforementioned TDD cycle (e.g., the cycle of a Time Division Duplex (TDD) uplink-downlink pattern). For example, Figure 19 As shown, when SBFD symbols are configured in units of period P and some of the SBFD symbols within period P are switched to non-FD symbols, period P can represent the TDD UL-DL pattern period or a multiple of the TDD UL-DL pattern period. For example, the TDD UL-DL pattern period can be configured by determining the cell-specific UL / DL TDD configuration's "TDD-UL-DL-ConfigCommon".

[0507] The following table is an example of "TDD-UL-DL-ConfigCommon".

[0508] [Table 5]

[0509] In the table above, "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 where all symbols within the slot are downlink symbols. "nrofDownlinkSymbols" indicates the number of consecutive downlink symbols at the beginning of slots 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 where all symbols within the slot are uplink symbols. "nrofUplinkSymbols" indicates the number of consecutive uplink symbols at the end of slots preceding the first full uplink slot.

[0510] According to the implementation method, FD time resources can be configured semi-statically by higher-layer signals. On the other hand, non-FD time resources can be dynamically indicated by DCI.

[0511] According to an implementation, when FD time resources are configured across multiple periods, non-FD time resources may include all FD time resources included in any one of the multiple periods. (As already referenced above...) Figure 20 This describes such an operation. That is, as... Figure 20As shown, in multiple cycles (e.g., cycle #p-1, cycle #p, cycle #p+1, cycle #p+2), where some consecutive symbols in each cycle are configured as SBFD symbols and the remaining symbols are configured as non-SBFD symbols, the second information can indicate or notify any one of the multiple cycles (e.g., cycle #p). The UE can then perform transmit and receive operations with the network after switching / converting all SBFD symbols present in any one cycle (e.g., cycle #p) to non-SBFD symbols. Here, for ease of explanation, the case where the second information indicates any one of the multiple cycles is illustrated, but it is not limited to this. That is, the second information can indicate two or more of the multiple cycles.

[0512] according to Figure 21 The method described herein has the advantage of reducing the number of transitions between FD time resources and non-FD time resources when switching from FD time resources (e.g., SBFD time resources) to non-FD time resources (e.g., non-SBFD time resources).

[0513] That is, according to the method of this disclosure, when a rollback operation is supported to switch a time resource configured as an SBFD resource to a non-SBFD resource, the frequency of transitions between SBFD and non-SBFD time resources can be reduced. Therefore, increased operational complexity between devices can be prevented, and throughput reduction due to frequent transition periods can also be prevented.

[0514] Figure 22 Examples are given based on Figure 21 Examples of base station and UE operation methods in wireless communication systems.

[0515] Reference Figure 22 The base station provides the UE with TDD configuration information, including TDD cycle information (S220).

[0516] The base station sends first information to the UE for configuring periodic full-duplex (FD) time resources (S221).

[0517] The base station sends a second message (S222) to the UE notifying it of non-FD time resources. This second message may represent information related to switching some FD time resources to non-FD time resources at specific intervals, and the specific interval may, for example, be a TDD period provided by TDD configuration information, or a multiple of the TDD period. This has already been referenced above. Figure 21 It has been described.

[0518] The UE determines FD time resources and non-FD time resources based on the first information and the second information (S223). In the above... Figure 19 and Figure 20 The process of determining this is described in the text.

[0519] The base station and UE perform transmit and receive 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).

[0520] exist Figure 22 The example describes a scenario where the first information is provided separately from the TDD configuration information, but the first information can be provided to the UE by being included in the TDD configuration information.

[0521] In addition, Figure 22 The example describes a situation where the first and second information are provided separately by different signals, but they can be provided by including them in the same signal.

[0522] TDD configuration information and the first information can be provided by the RRC signal, and the second information can be provided by the MAC CE and / or DCI. (The above has already been referenced.) Figure 21 A specific example of this operation is described. Alternatively, both the first and second information can be provided by a higher-level signal such as an RRC signal.

[0523] Figure 23 Examples of wireless devices applicable to this document are shown.

[0524] Reference Figure 23 The first wireless device 100 and the second wireless device 200 can transmit radio signals via various RATs (e.g., LTE and NR).

[0525] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and additionally include one or more transceivers 106 and / or one or more antennas 108. The processors 102 may control the memories 104 and / or the transceivers 106, and may be configured to implement the descriptions, functions, processes, suggestions, methods, and / or operation flowcharts disclosed herein. For example, the processors 102 may process information in the memories 104 to generate a first information / signal, which can then be transmitted via the transceivers 106 as a radio signal including the first information / signal. Additionally, the processors 102 may receive a radio signal including a second information / signal via the transceivers 106, and can then store information obtained from signal processing of the second information / signal in the memories 104. The memories 104 may be connected to the processors 102 and may store various pieces of information related to the operation of the processors 102. For example, memory 104 may store software code including instructions for performing some or all of the processing controlled by processor 102 or for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed herein. Here, processor 102 and memory 104 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 106 may be connected to processor 102 and may transmit and / or receive radio signals via one or more antennas 108. Transceiver 106 may include a transmitter and / or a receiver. Transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In this document, a wireless device may refer to a communication modem / circuit / chip. Processor 102 receives first information for configuring periodic full-duplex (FD) time resources, receives second information indicating non-FD time resources, and performs transmit and receive operations based on the first and second information. The second information is information for switching some of the FD time resources to non-FD time resources on a specific periodic basis. A specific period is a time interval equal to or a multiple of the Time Division Duplex (TDD) period provided by the TDD configuration information.

[0526] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and additionally include one or more transceivers 206 and / or one or more antennas 208. The processors 202 may control the memories 204 and / or the transceivers 206, and may be configured to implement the descriptions, functions, processes, proposals, methods, and / or operational flows disclosed in this document. For example, the processors 202 may process information in the memories 204 to generate third information / signals, which can then be transmitted via the transceivers 206 as radio signals including the third information / signals. Additionally, the processors 202 may receive radio signals including fourth information / signals via the transceivers 206, and may store information obtained by processing the fourth information / signals in the memories 204. The memories 204 may be connected to the processors 202 and may store various information related to the operation of the processors 202. For example, memory 204 may store software code, including instructions for performing some or all of the processing controlled by processor 202 or for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed herein. Here, processor 202 and memory 204 may be part of a communication modem / circuit / chip designed to implement RAT (e.g., LTE or NR). Transceiver 206 may be connected to processor 202 and may transmit and / or receive radio signals via one or more antennas 208. Transceiver 206 may include a transmitter and / or a receiver. Transceiver 206 may be used interchangeably with an RF unit. In this document, a wireless device may refer to a communication modem / circuit / chip. Processor 202 sends first information to user equipment (UE) for configuring periodic full-duplex (FD) time resources, sends second information to the UE indicating non-FD time resources, and communicates with the UE based on the first and second information. The second information is information for switching some of the FD time resources to non-FD time resources on a specific periodic basis. A specific period is a time interval equal to or a multiple of the Time Division Duplex (TDD) period provided by the TDD configuration information.

[0527] The hardware components of wireless devices 100 and 200 will be described in more detail below. One or more protocol layers may be implemented by, but are not limited to, one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) in accordance with the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information in accordance with the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. One or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information, according to the functions, processes, proposals, and / or methods disclosed in this document, and may provide the generated signals to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive signals (e.g., baseband signals) from one or more transceivers 106 and 206, and may acquire PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document.

[0528] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 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 one or more processors 102 and 202. One or more processors 102 and 202 may be implemented using at least one computer-readable medium (CRM) including instructions to be executed by at least one processor.

[0529] That is, at least one computer-readable medium (CRM) based on instructions executed by at least one processor performs the following steps: receiving first information for configuring periodic full-duplex (FD) time resources, receiving second information indicating non-FD time resources, and performing transmit and receive operations based on the first and second information. The second information is information for switching some of the FD time resources to non-FD time resources.

[0530] The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software, and such firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be included in one or more processors 102 and 202, or stored in one or more memories 104 and 204, so as to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document may be implemented using firmware or software in the form of code, commands, and / or command sets.

[0531] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, codes, instructions, and / or commands. One or more memories 104 and 204 may be configured as read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, registers, cache, computer-readable storage media, and / or combinations thereof. At least one memory 104 and 204 may be located internally and / or externally to one or more processors 102 and 202. Furthermore, one or more memories 104 and 204 may be connected to one or more processors 102 and 202 via various technologies such as wired or wireless connections.

[0532] One or more transceivers 106 and 206 can transmit user data, control information, and / or radio signals / channels as disclosed in the methods and / or operation flowcharts disclosed in this document to one or more other devices. One or more transceivers 106 and 206 can receive user data, control information, and / or radio signals / channels as disclosed in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 can be connected to one or more processors 102 and 202 and can transmit and receive radio signals. For example, one or more processors 102 and 202 can perform control to enable one or more transceivers 106 and 206 to transmit user data, control information, or radio signals to one or more other devices. Additionally, one or more processors 102 and 202 can perform control to enable one or more transceivers 106 and 206 to receive user data, control information, or radio signals from one or more other devices. Additionally, one or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit or receive user data, control information, and / or radio signals / channels mentioned in the descriptions, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document through one or more antennas 108 and 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 and 206 may convert received radio signals / channels, etc., from RF band signals to baseband signals for processing by one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc., processed by one or more processors 102 and 202 from baseband signals to RF band signals. For this purpose, one or more transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0533] Figure 24 An example of the structure of a signal processing module is shown. Here, signal processing can be performed... Figure 23 It is executed in processors 102 and 202.

[0534] Reference Figure 24 The transmitting device (e.g., processor, processor and memory, or processor and transceiver) in the UE or BS 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.

[0535] The transmitting device can transmit one or more codewords. The encoded bits in each codeword are scrambled by a corresponding scrambler 301 and transmitted over the physical channel. The codeword can be referred to as a data string and can be equivalent to a transport block provided as a data block by the MAC layer.

[0536] The corresponding modulator 302 can modulate the scrambled bits into complex-valued modulation symbols. Modulator 302 can modulate the scrambled bits according to a modulation scheme to arrange complex-valued modulation symbols representing their positions on the signal constellation diagram. The modulation scheme is unrestricted, and m-PSK (m-phase shift keying) or m-QAM (m-quadrature amplitude modulation) can be used to modulate the coded data. The modulator can be referred to as a modulation mapper.

[0537] Complex-valued modulation symbols can be mapped to one or more transmission layers by layer mapper 303. Complex-valued modulation symbols on each layer can be mapped by antenna port mapper 304 for transmission at antenna ports.

[0538] Each resource block mapper 305 can map the complex-valued modulation symbols for each antenna port to appropriate resource elements in the virtual resource blocks allocated for transmission. The resource block mapper can map virtual resource blocks to physical resource blocks according to an appropriate mapping scheme. The resource block mapper 305 can allocate the complex-valued modulation symbols for each antenna port to appropriate subcarriers and multiplex the complex-valued modulation symbols according to the user.

[0539] Signal generator 306 can modulate complex-valued modulation symbols, i.e., antenna-specific symbols, for each antenna port according to a specific modulation scheme (e.g., OFDM (Orthogonal Frequency Division Multiplexing)) to generate complex-valued time-domain OFDM symbol signals. The signal generator can perform an IFFT (Inverse Fast Fourier Transform) on the antenna-specific symbols and can insert a CP (Cyclic Prefix) into the IFFT-operated time-domain symbols. The OFDM symbols undergo digital-to-analog conversion and up-conversion before being transmitted to the receiving device through each transmit antenna. The signal generator may include an IFFT module, a CP insertion unit, a digital-to-analog converter (DAC), and an up-converter.

[0540] Figure 25 Another example illustrating the structure of a signal processing module in a transmitting device is given. Here, signal processing can be performed in the processor of the UE / BS, for example... Figure 23 Processors 102 and 202.

[0541] Reference Figure 25 The transmitting device (e.g., processor, processor and memory, or processor and transceiver) in the UE or BS 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.

[0542] The transmitting device can scramble the encoded bits in the codeword using the corresponding scrambler 401, and then transmit the scrambled encoded bits through the physical channel.

[0543] The scrambled bits are modulated into complex-valued modulation symbols by the corresponding modulator 402. The modulator can modulate the scrambled bits according to a predetermined modulation scheme to arrange complex-valued modulation symbols representing the positions on the signal constellation diagram. The modulation scheme is unrestricted and can use π / 2-BPSK (π / 2-binary phase shift keying), m-PSK (m-phase shift keying), or m-QAM (m-quadrature amplitude modulation) to modulate the coded data.

[0544] Complex-valued modulation symbols can be mapped to one or more transport layers by layer mapper 403.

[0545] Complex-valued modulation symbols on each layer can be pre-coded by pre-encoder 404 for transmission at antenna ports. Here, the pre-encoder can perform transform precoding on the complex-valued modulation symbols, followed by precoding. Alternatively, the pre-encoder can perform precoding without transform precoding. Pre-encoder 404 can process the complex-valued modulation symbols according to MIMO using multiple transmit antennas to output antenna-specific symbols and assign these symbols to the corresponding resource block mapper 405. The output z of pre-encoder 404 can be obtained by multiplying the output y of layer mapper 403 by an N×M precoding matrix W. Here, N is the number of antenna ports, and M is the number of layers.

[0546] Each resource block mapper 405 maps the complex-valued modulation symbol for each antenna port to the appropriate resource element in the virtual resource block allocated for transmission.

[0547] Resource block mapper 405 can assign complex-valued modulation symbols to appropriate subcarriers and multiplex complex-valued modulation symbols according to users.

[0548] Signal generator 406 can modulate complex-valued modulation symbols according to a specific modulation scheme (e.g., OFDM) to generate complex-valued time-domain OFDM symbol signals. Signal generator 406 can perform IFFT (Inverse Fast Fourier Transform) on antenna-specific symbols and can insert CP (Cyclic Prefix) into the time-domain symbols that have undergone IFFT. The OFDM symbols are then converted from digital to analog and up-converted before being transmitted to the receiving device through each transmit antenna. Signal generator 406 may include an IFFT module, a CP insertion unit, a digital-to-analog converter (DAC), and an up-converter.

[0549] The signal processing of the receiving device can be the reverse of the signal processing of the transmitting device. Specifically, the processor of the transmitting device decodes and demodulates the RF signal received through the antenna port of the transceiver. The receiving device may include multiple receiving antennas, and the signals received through the receiving antennas are recovered into baseband signals, which are then multiplexed and demodulated according to MIMO to recover the data string intended to be transmitted by the transmitting device. The receiving device may include: a signal recovery unit that recovers the received signal into a baseband signal; a multiplexer for combining and multiplexing the received signals; and a channel demodulator for demodulating the multiplexed signal string into corresponding codewords. The signal recovery unit, multiplexer, and channel demodulator may be configured as integrated modules or independent modules for performing their functions. More specifically, the signal recovery unit may include: an analog-to-digital converter (ADC) for converting an analog signal into a digital signal; a CP removal unit for removing CP from the digital signal; a FET module for applying an FFT (Fast Fourier Transform) to the CP-removed signal to output a frequency domain signal; and a resource element demapping / equalizer for recovering the frequency domain symbols into antenna-specific symbols. The antenna-specific symbols are then recovered into the transport layer by a multiplexer, and the transport layer is recovered into codewords intended to be transmitted by a transmitting device by a channel demodulator.

[0550] Figure 26 An example of a wireless communication device according to an implementation example of this disclosure is illustrated.

[0551] Reference Figure 26 A wireless communication device, such as a UE, may include at least one of a processor 2310 (e.g., a digital signal processor (DSP) or microprocessor), a transceiver 2335, a power management module 2305, an antenna 2340, a battery 2355, a display 2315, a keyboard 2320, a global positioning system (GPS) chip 2360, a sensor 2365, a memory 2330, a user identification module (SIM) card 2325, a speaker 2345, and a microphone 2350. Multiple antennas and multiple processors may be provided.

[0552] The processor 2310 can implement the functions, processes and methods described herein. Figure 25 The processor 2310 Figure 26 The memory 2330 in the memory can be Figure 23 The processors 102 and 202 are in the middle.

[0553] The memory 2330 is connected to the processor 2310 and stores information related to processor operation. The memory can be located inside or outside the processor and can be connected to the processor via various technologies such as wired or wireless connections. Figure 26The memory 2330 in the memory can be Figure 23 The memory in the memory is 104 and 204.

[0554] Users can use various technologies, such as pressing buttons on keypad 2320 or using microphone 2350 to activate sound, to input various types of information, such as phone numbers. Processor 2310 can receive and process user information and perform appropriate functions, such as making a call using the entered phone number. In some scenarios, data can be retrieved from SIM card 2325 or memory 2330 to perform appropriate functions. In some scenarios, processor 2310 can display various types of information and data on display 2315 for user convenience.

[0555] Transceiver 2335 is connected to processor 2310 and transmits and / or receives RF signals. The processor can control the transceiver to initiate communication or transmit RF signals, including various types of information or data such as voice communication data. The transceiver includes a transmitter and a receiver for transmitting and receiving RF signals. Antenna 2340 facilitates the transmission and reception of RF signals. In some implementation examples, when the transceiver receives an RF signal, it can forward the signal and convert it into a baseband frequency for use in processing performed by the processor. The signal can be processed using various techniques, such as converting it into audible or readable information, for output through speaker 2345. Figure 26 The transceiver in the middle can be Figure 29 The transceivers in the middle are 106 and 206.

[0556] although Figure 26 Not shown in the diagram, but the UE may also include various components such as a camera and a Universal Serial Bus (USB) port. For example, the camera may be connected to the processor 2310.

[0557] Figure 26 This is an example of a UE implementation, and the implementation examples disclosed herein are not limited to this. The UE does not necessarily have to include... Figure 26 All components are shown. That is to say, some components, such as the keyboard 2320, GPS chip 2360, sensor 2365, and SIM card 2325, may not be required. In this case, they may not be included in the UE.

[0558] Figure 27 An example of a processor 2000 is shown.

[0559] Reference Figure 27 The processor 2000 may include a control channel transceiver 2010 and a data channel transceiver 2020. For example, the processor 2000 can perform operations from the perspective of the UE. Figures 16 to 22 The method described in [the document]. The processor 2000 can be [the method described in the document]. Figure 23 Examples of processors 102 and 202.

[0560] Figure 28 An example of processor 3000 is shown.

[0561] Reference Figure 28 The processor 3000 may include a control information / data generation module 3010 and a transmission / reception module 3020. The processor 3000 can perform operations, for example, from the perspective of a base station or network. Figures 16 to 22 The method described in [the document]. The processor 3000 can be [the method described in the document]. Figure 23 Examples of processors 102 and 202.

[0562] Figure 29 Another example of a wireless device is shown.

[0563] Reference Figure 29 The wireless device may include one or more processors 102 and 202, one or more memories 104 and 204, one or more transceivers 106 and 206, and one or more antennas 108 and 208.

[0564] Figure 29 Examples of wireless devices described in the document and Figure 23 The difference between the examples of wireless devices described in the text and the examples of wireless devices described in the text is that... Figure 23 The processors 102 and 202 are separate from the memories 104 and 204, while Figure 29 In the example, memories 104 and 204 are included in processors 102 and 202. That is, the processor and memory can form a chipset.

[0565] Figure 30 Another example of a wireless device used in this paper is shown. Wireless devices can be implemented in various forms depending on the use case / service.

[0566] Reference Figure 30 Wireless devices 100 and 200 can correspond to Figure 23 The wireless devices 100 and 200 can be configured with various elements, components, units / parts, and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and additional components 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include one or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include... Figure 23The device comprises one or more transceivers 106 and 206 and / or one or more antennas 108 and 208. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on programs / code / commands / information stored in the memory unit 130. Furthermore, the control unit 120 may transmit information stored in the memory unit 130 to an external source (e.g., another communication device) via the communication unit 110 through a wireless / wired interface, or store information received from an external source (e.g., another communication device) via the communication unit 110 through a wireless / wired interface in the memory unit 130.

[0567] The additional component 140 can be configured differently depending on the type of wireless device. For example, the additional component 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be implemented in the form of, but is not limited to, the robot 100a of FIG. 34, vehicles 100b-1 and 100b-2 of FIG. 34, the XR device 100c of FIG. 34, the handheld device 100d of FIG. 34, the home appliance 100e of FIG. 34, the IoT device 100f of FIG. 34, a digital broadcast UE, a holographic device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device 400 of FIG. 34, a BS 200 of FIG. 34, a network node, etc. Depending on the use example / service, the wireless device may be used in a mobile or fixed location.

[0568] exist Figure 30 In wireless devices 100 and 200, various elements, components, units / parts, and / or modules can be fully interconnected via wired interfaces, or at least partially wirelessly connected via communication unit 110. For example, within wireless devices 100 and 200, control unit 120 and communication unit 110 can be wired together, and control unit 120 and first units (e.g., 130 and 140) can be connected via communication unit 110. Additionally, the various elements, components, units / parts, and / or modules within wireless devices 100 and 200 may also include one or more elements. For example, control unit 120 may include one or more processor groups. For example, control unit 120 may include a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, and a memory control processor. As another example, memory unit 130 includes random access memory (RAM), dynamic RAM (DRAM), read-only memory (ROM), flash memory, volatile memory, and / or combinations thereof.

[0569] Examples of handheld devices to which this document applies are provided. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses), or portable computers (e.g., laptops). Handheld devices may be referred to as mobile stations (MS), user terminals (UT), mobile subscriber stations (MSS), subscriber stations (SS), advanced mobile stations (AMS), or wireless terminals (WT).

[0570] Figure 31 The communication system 1 used in this paper is illustrated.

[0571] Reference Figure 31 The communication system 1 used herein includes wireless devices, base stations (BS), and networks. In this document, a wireless device refers to a device that communicates using radio access technology (RAT) (e.g., 5G New RAT (NR)) or Long Term Evolution (LTE) and may be referred to as a communication / radio / 5G device. Wireless devices may include, but are not limited to, robots 100a, vehicles 100b-1 and 100b-2, extended reality (XR) devices 100c, handheld devices 100d, home appliances 100e, Internet of Things (IoT) devices 100f, and artificial intelligence (AI) devices / servers 400. For example, a vehicle may include a vehicle with wireless communication capabilities, an autonomous vehicle, and a vehicle capable of communication between vehicles. Here, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head-mounted displays (HMDs), head-up displays (HUDs) installed in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, robots, etc. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smartwatches or smart glasses), and computers (e.g., laptops). Home appliances may include televisions, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, the BS and network can be implemented as wireless devices, and a particular wireless device 200a can operate as a BS / network node relative to other wireless devices.

[0572] Wireless devices 100a to 100f can connect to network 300 via BS 200. AI technology can be applied to wireless devices 100a to 100f, and wireless devices 100a to 100f can connect to AI server 400 via network 300. Network 300 can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although wireless devices 100a to 100f can communicate with each other via BS 200 / network 300, wireless devices 100a to 100f can also perform direct communication with each other without going through the BS / network (e.g., secondary link communication). For example, vehicles 100b-1 and 100b-2 can perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). In addition, IoT devices (e.g., sensors) can perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0573] Wireless communication / connections 150a, 150b, or 150c can be established between wireless devices 100a to 100f / BS 200 or between BS 200 and BS 200. In this document, wireless communication / connections can be established via various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, secondary link communication 150b (or D2D communication), or inter-BS communication (e.g., relay, integrated access and backhaul (IAB)). Wireless devices and BS / wireless devices can transmit / receive radio signals to / from each other via wireless communication / connections 150a and 150b. For example, wireless communication / connections 150a and 150b can transmit / receive signals via various physical channels. To this end, at least a portion of various configuration information configuration processes, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and resource allocation processes for transmitting / receiving radio signals can be performed based on various proposals of this disclosure.

[0574] In addition, NR supports multiple parameter sets (or subcarrier spacing (SCS)) to support a variety of 5G services. For example, a 15 kHz SCS can support wide-area coverage in traditional cellular bands. A 30 kHz / 60 kHz SCS supports dense urban areas, lower latency, and wider carrier bandwidth. A 60 kHz or higher SCS uses a bandwidth greater than 24.25 GHz to overcome phase noise.

[0575] NR bands can be defined as two types of frequency ranges (FR1, FR2). The values ​​of the frequency ranges can be changed. For example, the two types of frequency ranges (FR1, FR2) are shown in Table 6 below. For ease of explanation, in the frequency ranges used in NR systems, FR1 can represent "below 6 GHz" and FR2 can represent "above 6 GHz" and can also be referred to as millimeter wave (mmW).

[0576] [Table 6]

[0577] As mentioned above, the frequency range value in an NR system can be varied. For example, as shown in Table 7 below, FR1 can include a frequency band ranging from 410MHz to 7125MHz. That is, FR1 can include a frequency band of at least 6GHz (or 5850MHz, 5900MHz, 5925MHz, etc.). For example, the frequency band of at least 6GHz (or 5850MHz, 5900MHz, 5925MHz, etc.) included in FR1 can include unlicensed frequency bands. Unlicensed frequency bands can be used for various purposes, such as unlicensed frequency bands for vehicle-specific communications (e.g., autonomous driving).

[0578] [Table 7]

[0579] The claims disclosed herein can be combined in various ways. For example, technical features from the method claims herein can be combined to implement or perform in a device, and technical features from the device claims herein can be combined to implement or perform in a method. Additionally, technical features from the method claims and device claims herein can be combined to implement or perform in a device.

Claims

1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising: Receive first information for configuring periodic full-duplex FD time resources; Receive second information indicating non-FD time resources; as well as Based on the first information and the second information, send and receive operations are performed. The second information is used to switch some of the FD time resources to the non-FD time resources on a specific periodic basis, and The specific period is a time interval equal to or a multiple of the TDD period provided by the time-division duplex (TDD) configuration information.

2. The method according to claim 1, wherein, Based on the fact that the FD time resource is a plurality of consecutive symbols within the specific period, the non-FD time resource includes N1 consecutive symbols starting from the first symbol among the plurality of symbols and N2 consecutive symbols starting from the last symbol among the plurality of symbols, where N1 is a natural number and N2 is a natural number.

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

4. The method according to claim 2, wherein, Candidate values ​​for N1 and N2 are configured via Radio Resource Control (RRC) messages, wherein at least one of the candidate values ​​is received via Media Access Control (MAC) control element (CE) and Downlink Control Information (DCI).

5. The method according to claim 1, wherein, The operation of switching some of the FD time resources to the non-FD time resources is performed with the period of the time division duplex (TDD) uplink-downlink pattern as the smallest unit.

6. The method according to claim 1, wherein, The FD time resources are configured semi-statically by higher-layer signals.

7. The method according to claim 1, wherein, The non-FD time resources are dynamically indicated by DCI.

8. The method according to claim 1, wherein, Based on configuring the FD time resources in multiple cycles, the non-FD time resources include all FD time resources included in any one of the multiple cycles.

9. A user equipment (UE), the UE comprising: At least one transceiver; At least one memory; as well as At least one processor, said at least one processor being operatively connected to said at least one transceiver and said at least one memory, Wherein, the at least one memory stores instructions, the instructions performing operations based on execution by the at least one processor, the operations including: Receive first information for configuring periodic full-duplex FD time resources; Receive second information indicating non-FD time resources; and Based on the first information and the second information, send and receive operations are performed. The second information is used to switch some of the FD time resources to the non-FD time resources on a specific periodic basis, and The specific period is a time interval equal to or a multiple of the TDD period provided by the time-division duplex (TDD) configuration information.

10. The UE according to claim 9, wherein, Based on the fact that the FD time resource is a plurality of consecutive symbols within the specific period, the non-FD time resource includes N1 consecutive symbols starting from the first symbol among the plurality of symbols and N2 consecutive symbols starting from the last symbol among the plurality of symbols, where N1 is a natural number and N2 is a natural number.

11. The UE according to claim 10, wherein, The second information includes information related to N1 and information related to N2.

12. The UE according to claim 10, wherein, Candidate values ​​for N1 and N2 are configured via Radio Resource Control (RRC) messages, wherein at least one of the candidate values ​​is received via Media Access Control (MAC) control element (CE) and Downlink Control Information (DCI).

13. The UE according to claim 9, wherein, The operation of switching some of the FD time resources to the non-FD time resources is performed with the period of the time division duplex (TDD) uplink-downlink pattern as the smallest unit.

14. The UE according to claim 9, wherein, The FD time resources are configured semi-statically by higher-layer signals.

15. The UE according to claim 9, wherein, The non-FD time resources are dynamically indicated by DCI.

16. The UE according to claim 9, wherein, Based on configuring the FD time resources in multiple cycles, the non-FD time resources include all FD time resources included in any one of the multiple cycles.

17. An apparatus for a user equipment (UE), the apparatus comprising: At least one memory; as well as At least one processor, said at least one processor being operatively connected to said at least one memory, Wherein, the at least one memory stores instructions, the instructions performing operations based on execution by the at least one processor, the operations including: Receive first information for configuring periodic full-duplex FD time resources; Receive second information indicating non-FD time resources; and Based on the first information and the second information, send and receive operations are performed. The second information is used to switch some of the FD time resources to the non-FD time resources on a specific periodic basis, and The specific period is a time interval equal to or a multiple of the TDD period provided by the time-division duplex (TDD) configuration information.

18. A non-transitory computer-readable medium CRM comprising at least one instruction, said at least one instruction being executed by at least one processor to direct means: Receive first information for configuring periodic full-duplex FD time resources; Receive second information indicating non-FD time resources; and Based on the first information and the second information, send and receive operations are performed. in, The second information is used to switch some of the FD time resources to the non-FD time resources on a specific periodic basis, and The specific period is a time interval equal to or a multiple of the TDD period provided by the time-division duplex (TDD) configuration information.

19. A method performed by a base station in a wireless communication system, the method comprising: Send first information to the user equipment (UE) for configuring periodic full-duplex (FD) time resources; Send a second message indicating non-FD time resources to the UE; as well as Communicating with the UE based on the first information and the second information. The second information is used to switch some of the FD time resources to the non-FD time resources on a specific periodic basis, and The specific period is a time interval equal to or a multiple of the TDD period provided by the time-division duplex (TDD) configuration information.

20. A base station, the base station comprising: At least one transceiver; At least one memory; as well as At least one processor, said at least one processor being operatively connected to said at least one transceiver and said at least one memory, Wherein, the at least one memory stores instructions, the instructions performing operations based on execution by the at least one processor, the operations including: Send first information to the user equipment (UE) for configuring periodic full-duplex (FD) time resources; Send second information indicating non-FD time resources to the UE; and Communicating with the UE based on the first information and the second information. The second information is used to switch some of the FD time resources to the non-FD time resources on a specific periodic basis, and The specific period is a time interval equal to or a multiple of the TDD period provided by the time-division duplex (TDD) configuration information.

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