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

Abstract

A device and a method for operation of a device in a wireless communication system are provided. The device may be a UE, a chipset, or a base station. The UE receives an FD configuration message notifying a full duplex symbol among a plurality of symbols, receives a cell-specific common time division duplex (TDD) configuration message, and receives a UE-specific dedicated TDD configuration. Here, for only a full duplex symbol among the plurality of symbols, the second direction information notified by the dedicated TDD configuration message covers the first direction information notified by the common TDD configuration message.

Description

Technical Field

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

[0002] As more and more communication devices require greater communication capacity, improved mobile broadband communications relative to existing radio access technologies are needed. Moreover, large-scale machine type communications (MTC) that provide various services by connecting many devices and multiple objects is also one of the main issues to be considered in the next generation of communications. In addition, the design of communication systems considering services / UEs that are sensitive to reliability / latency is under discussion. The introduction of next-generation radio access technologies that consider enhanced mobile broadband communications (eMBB), massive MTC (mMTC), and ultra-reliable low latency communications (URLLC) is under discussion. In the present disclosure, for convenience, this new technology may be referred to as a new radio access technology (new RAT or NR).

[0003] In NR, full-duplex (FD) operation can be performed. When performing FD operation, downlink reception and uplink transmission can occur simultaneously in a given time resource. The difference with half-duplex (HD) operation is that only one of downlink reception and uplink transmission can be performed in a given time resource. For FD operation, i) in the same time resource, some frequency resources can be allocated for downlink subbands and other frequency resources can be allocated for uplink subbands, or ii) frequency resources that can be used for both downlink reception and uplink transmission in the same time resource can be allocated.

[0004] For a user equipment (UE) capable of recognizing full-duplex operation, in order for a base station to use a specific time resource (e.g., a specific symbol) as a full-duplex resource, the specific time resource should be available for downlink or uplink. In existing standard specifications, in order to perform this operation, the specific time resource must be a flexible resource (flexible symbol). That is, in the prior art, in order to use a specific time resource as a full-duplex resource, the specific time resource must be set as a flexible resource.

[0005] However, in the case of a base station or UE that is actually deployed, there is a situation where a time division duplex (TDD) configuration that uses a specific mode (e.g., DDDDU) is fixed. In this case, it may be difficult to support full-duplex operation due to a lack of flexible resources that can perform full-duplex operation, resulting in reduced resource utilization efficiency and decreased system throughput. Summary of the invention

[0006] Technical issues

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

[0008] Solution

[0009] A method for operating a device in a wireless communication system and a device using the method are provided. According to the method, a UE receives an FD configuration message indicating a full-duplex symbol among a plurality of symbols, receives a cell-specific public TDD configuration message, and receives a UE-specific dedicated TDD configuration message. At this time, among the plurality of symbols, only for the full-duplex symbol, the second direction information indicated by the dedicated TDD configuration message overrides the first direction information indicated by the public TDD configuration message.

[0010] Beneficial Effects

[0011] According to the method of the present disclosure, even in an environment where the existing UE uses a TDD configuration with almost no flexible resources, full-duplex operation can be supported for an enhanced UE capable of recognizing full-duplex. Therefore, resource utilization efficiency can be improved, and throughput can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A wireless communication system to which the present disclosure can be applied is illustrated.

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

[0014] Figure 3 is a block diagram illustrating a radio protocol architecture for a control plane.

[0015] Figure 4 The system structure of the next generation radio access network (NG-RAN) to which NR is applied is illustrated.

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

[0017] Figure 6 The frame structure applicable to NR is illustrated.

[0018] Figure 7 The time slot structure of the NR frame is illustrated.

[0019] Figure 8 CORESET is instantiated.

[0020] Fig. 9 An example of a frame structure for a new radio access technology is illustrated.

[0021] Fig.10 The structure of a self-contained time slot is illustrated.

[0022] Fig.11 Physical channels and typical signal transmission are illustrated.

[0023] Fig.12 An example of how full duplex is applied within a carrier is illustrated.

[0024] Fig.13 An example is shown in which time resources for half-duplex (HD) operation and time resources for full-duplex (FD) operation (eg, SBFD or SSFD) coexist.

[0025] Fig.14 Examples of a first time resource, a second time resource, a first frequency resource, and a second frequency resource are shown.

[0026] Fig.15 Another example of a first time resource, a second time resource, a first frequency resource, and a second frequency resource is shown.

[0027] Fig.16 The period of "tdd-UL-DL-ConfigCommon", the period of "tdd-UL-DL-ConfigDedicated", and the offset are illustrated.

[0028] Fig.17 An operation method of a UE in a wireless communication system is illustrated.

[0029] Fig.18 A specific example of overwriting first direction information (determined by a common TDD configuration message) with second direction information (determined by sending a TDD configuration message) for a full-duplex symbol among a plurality of symbols is illustrated.

[0030] Fig.19 A signaling method between a base station and a UE in a wireless communication system is illustrated.

[0031] Fig. 20 The wireless devices to which the present specification can be applied are exemplified.

[0032] Fig.21 An example of a signal processing module structure is shown.

[0033] Fig. 22 Another example of the structure of the signal processing module in the transmission device is shown.

[0034] Fig.23 An example of a wireless communication device according to an implementation example of the present disclosure is shown.

[0035] Fig.24 An example of a processor 2000 is shown.

[0036] Fig.25 An example of a processor 3000 is shown.

[0037] Fig.26 Another example of a wireless device is shown.

[0038] Fig. 27 Another example of a wireless device applied to the present specification is shown.

[0039] Fig.28 A mobile device to which this specification is applied is exemplified.

[0040] Fig.29 The communication system 1 applied to this specification is exemplified. DETAILED DESCRIPTION

[0041] In this specification, "A or B" may mean "only A", "only B", or "both A and B". In other words, in this specification, "A or B" may be interpreted as "A and / or B". For example, in this specification, "A, B or C" may mean "only A", "only B", "only C", or "any combination of A, B, C".

[0042] A slash ( / ) or a comma used in this specification may mean "and / or". For example, "A / B" may mean "A and / or B". Thus, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0043] In the present specification, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, in the present specification, 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".

[0044] In addition, in the present specification, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". In addition, "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".

[0045] In addition, brackets used in this specification may mean "for example". Specifically, when indicated as "control information (PDCCH)", this may mean that "PDCCH" is proposed as an example of "control information". In other words, the "control information" of this specification is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". Specifically, when indicated as "control information (ie, PDCCH)", this may also mean that "PDCCH" is proposed as an example of "control information".

[0046] The technical features described separately in one drawing in this specification may be implemented separately or simultaneously.

[0047] Figure 1 A wireless communication system to which the present disclosure is applicable is exemplified. This may also be referred to as an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) or LTE (Long Term Evolution) / LTE-A system.

[0048] The E-UTRAN includes a base station (BS) 20 that provides a control plane and a user plane to a user equipment (UE) 10. The UE 10 may be fixed or mobile, and may be referred to as another term, such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a wireless device, a terminal, etc. The BS 20 is generally a fixed station that communicates with the UE 10, and may be referred to as another term, such as an evolved Node B (eNB), a base transceiver system (BTS), an access point, etc.

[0049] The BSs are interconnected via an X2 interface. The BSs are also connected to an Evolved Packet Core (EPC) 30 via an S1 interface, more specifically, to a Mobility Management Entity (MME) via S1-MME, and to a Serving Gateway (S-GW) via S1-U.

[0050] The EPC 30 includes an MME, an S-GW, and a packet data network gateway (P-GW). The MME has access information of the UE or capability information of the UE, which is generally used for mobility management of the UE. The S-GW is a gateway with the E-UTRAN as an endpoint. The P-GW is a gateway with the PDN as an endpoint.

[0051] The radio interface protocol layer between the UE and the network can be divided into the first layer (L1), the second layer (L2) and the third layer (L3) based on the lower three layers of the well-known open system interconnection (OSI) model in the communication system. Among them, the physical layer (PHY) belonging to the first layer provides an information transmission service using a physical channel, and the radio resource control layer (RRC) belonging to the third layer is used to control radio resources between the UE and the network. For this purpose, the RRC layer exchanges RRC messages between the UE and the BS.

[0052] Figure 2 is a block diagram illustrating a radio protocol architecture for a user plane. Figure 3 is a block diagram showing the radio protocol architecture for the control plane. The user plane is a protocol stack for user data transmission. The control plane is a protocol stack for control signal transmission.

[0053] Reference Figure 2 and Figure 3, the PHY layer provides information transfer services to the upper layer (=higher layer) through a physical channel. The PHY layer is connected to the medium access control (MAC) layer, which is a higher layer of the PHY layer, through a transport channel. Data is transferred between the MAC layer and the PHY layer through the transport channel. Transport channels are classified according to how data is transferred through a radio interface and the characteristics of the data.

[0054] Data moves between different PHY layers (ie, a PHY layer of a transmitter and a PHY layer of a receiver) through a physical channel. The physical channel may be modulated according to an Orthogonal Frequency Division Multiplexing (OFDM) scheme and use time and frequency as radio resources.

[0055] The functions of the MAC layer include mapping between logical channels and transport channels and multiplexing and demultiplexing into transport blocks provided on transport channels of MAC service data units (SDUs) belonging to logical channels through physical channels. The MAC layer provides services to the radio link control (RLC) layer through logical channels.

[0056] The functions of the RLC layer include concatenation, segmentation, and reassembly of RLC SDUs. In order to ensure various types of quality of service (QoS) required by radio bearers (RBs), the RLC layer provides three types of operation modes: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[0057] 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 a logical route provided by the first layer (PHY layer) and the second layer (MAC layer, RLC layer, and PDCP layer) to transmit data between the UE and the network.

[0058] The functions of the Packet Data Convergence Protocol (PDCP) layer on the user plane include the transmission of user data and header compression and encryption. The functions of the PDCP layer on the user plane also include the transmission and encryption / integrity protection of control plane data.

[0059] Configuration of RB means the process of defining the characteristics of the radio protocol layer and the channel in order to provide a specific service and configuring various detailed parameters and operation methods. RB can be divided into two types: signaling RB (SRB) and data RB (DRB). SRB is used as a channel through which RRC messages are sent on the control plane, and DRB is used as a channel through which user data is sent on the user plane.

[0060] If an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected state. Otherwise, the UE is in the RRC idle state.

[0061] The downlink transmission channels used to send 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 traffic or control messages. Traffic or control messages for downlink multicast or broadcast services can be sent via the downlink SCH, or can be sent via another downlink multicast channel (MCH). In addition, the uplink transmission channels used to send 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 traffic or control messages.

[0062] Logical channels located above and mapped to the transport channels include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH) and a multicast traffic channel (MTCH).

[0063] A physical channel includes multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. A subframe includes multiple OFDM symbols in the time domain. RB is a resource allocation unit, including multiple OFDM symbols and multiple subcarriers. In addition, each subframe may use a specific subcarrier of a specific OFDM symbol (e.g., the first OFDM symbol) of the corresponding subframe for a physical downlink control channel (PDCCH), i.e., an L1 / L2 control channel. A transmission time interval (TTI) is a unit time for subframe transmission.

[0064] New radio access technology (New RAT, NR) will be described below.

[0065] As more and more communication devices require greater communication capacity, improved mobile broadband communications relative to existing radio access technologies are needed. Moreover, large-scale machine type communications (MTC) that provide various services by connecting many devices and multiple objects is also one of the main issues to be considered in the next generation of communications. In addition, the design of communication systems considering services / UEs that are sensitive to reliability / latency is under discussion. The introduction of next-generation radio access technologies that consider enhanced mobile broadband communications (eMBB), massive MTC (mMTC), and ultra-reliable low latency communications (URLLC) is under discussion. In the present disclosure, for convenience, this new technology may be referred to as a new radio access technology (new RAT or NR).

[0066] Figure 4 The system structure of the next generation radio access network (NG-RAN) to which NR is applied is illustrated.

[0067] Reference Figure 4, the NG-RAN may include gNBs and / or eNBs that provide user plane and control plane protocol terminations to the UE. Figure 4 The case where only gNB is included is illustrated. gNB (eNB) is connected through the Xn interface. The gNB and eNB are connected to the 5G core network (5GC) through the NG interface. More specifically, the gNB and eNB are connected to the access and mobility management function (AMF) through the NG-C interface, and are connected to the user plane function (UPF) through the NG-U interface.

[0068] Figure 5 Illustrate the functional division between NG-RAN and 5GC.

[0069] Reference Figure 5 , gNB can provide functions such as inter-cell radio resource management (Inter Cell RRM), radio bearer management (RB control), connection mobility control, radio admission control, measurement configuration and provision, dynamic resource allocation, etc. AMF can provide functions such as NAS security and idle state mobility processing. UPF can provide functions such as mobility anchoring and PDU processing. SMF can provide functions such as UE IP address allocation and PDU session control.

[0070] Figure 6 An example of a frame structure that can be applied to NR is illustrated.

[0071] Reference Figure 6 In NR, a radio frame (hereinafter also referred to as a frame) can be used for uplink transmission and downlink transmission. The length of the frame is 10ms and 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, and the number of time slots within an SF depends on the subcarrier spacing (SCS). Each time slot includes 12 or 14 OFDM (A) symbols depending on the cyclic prefix (CP). When a normal CP is used, each time slot includes 14 symbols. When an extended CP is used, each time slot includes 12 symbols. Here, the symbol may include an OFDM symbol (or CP-OFDM symbol) and a single carrier-FDMA (SC-FDMA) symbol (or a discrete Fourier transform spread-OFDM (DFT-s-OFDM) symbol).

[0072] The following Table 1 illustrates subcarrier spacing configuration μ.

[0073] [Table 1]

[0074]

[0075] Table 2 below illustrates the number of time slots (N) in a frame according to the subcarrier spacing configuration μ. frame,μslot ), the number of time slots in a subframe (N subframe,μ slot ), the number of symbols in a time slot (N slot symb )wait.

[0076] [Table 2]

[0077] exist Figure 6 In FIG. 1 , the cases where μ=0, 1, 2, and 3 are illustrated.

[0078] The following Table 2-1 illustrates that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS in the case of using extended CP.

[0079] [Table 2-1]

[0080] <![CDATA[SCS(15·2 μ )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,μ slot ]]> <![CDATA[N subframe,μ slot ]]> 60KHz(μ=2) 12 40 4

[0081] In the NR system, OFDM (A) parameter sets (e.g., SCS, CP length, etc.) may be configured differently between multiple cells merged into one UE. Therefore, the (absolute time) duration of time resources (e.g., SF, time slot, or TTI) (collectively referred to as time unit (TU) for simplicity) consisting of the same number of symbols may be configured differently between the merged cells.

[0082] Figure 7 The time slot structure is illustrated.

[0083] A time slot may include multiple symbols in the time domain. For example, in the case of a normal CP, a time slot may include 14 symbols (or 7 symbols), but in the case of an extended CP, a time slot may include 12 symbols (or 6 symbols). A carrier may include multiple subcarriers in the frequency domain. A resource block (RB) may be defined as a plurality of consecutive subcarriers (e.g., 12 subcarriers) in the frequency domain. A bandwidth part (BWP) may be defined as a plurality of consecutive (physical) resource blocks (P) RBs in the frequency domain, and a BWP may correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., 5) BWPs. Data communication may be performed via an active BWP, and only one BWP may be activated for a UE. In a resource grid, each element may be referred to as a resource element (RE), and a complex symbol may be mapped to an RE.

[0084] The physical downlink control channel (PDCCH) may include one or more control channel elements (CCEs) as illustrated in Table 3 below.

[0085] [Table 3]

[0086] Aggregation Level Number of CCEs 1 1 2 2 4 4 8 8 16 16

[0087] That is, the PDCCH may be transmitted through resources including 1, 2, 4, 8, or 16 CCEs. Here, the CCE includes six resource element groups (REGs), and one REG includes one resource block in the frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in the time domain.

[0088] Monitoring implies decoding each PDCCH candidate according to the Downlink Control Information (DCI) format.The UE monitors the set of PDCCH candidates in one or more CORESETs (described below) on the active DL BWP of each activated serving cell configured with PDCCH monitoring according to the corresponding search space set.

[0089] A new unit called Control Resource Set (CORESET) may be introduced in NR. The UE may receive PDC CH in the CORESET.

[0090] Figure 8 CORESET is instantiated.

[0091] Reference Figure 8 , CORESET includes N in the frequency domain CORESET RB resource blocks and N in the time domain CORESET symb ∈{1, 2, 3} symbols. N may be provided by the base station via higher layer signaling CORESET RB and N CORESET symb .like Figure 8 As illustrated in the example, a CORESET may include multiple CCEs (or REGs).

[0092] The UE may attempt to detect a PDCCH in units of 1, 2, 4, 8, or 16 CCEs in a CORESET. One or more CCEs for which PDCCH detection may be attempted may be referred to as PDCCH candidates.

[0093] Multiple CORESETs can be configured for a UE.

[0094] The control region in the wireless communication system (e.g., LTE / LTE-A) of the related art is configured over the entire system frequency band for use by the base station (BS). All UEs except some UEs (e.g., eMTC / NB-IoT UEs) that only support narrowband must be able to receive wireless signals of the entire system frequency band of the BS in order to properly receive / decode control information sent by the BS.

[0095] On the other hand, in NR, the above-mentioned CORESET is introduced. CORESET is a radio resource for control information to be received by UE, and can use only a part of the system bandwidth instead of the entire system bandwidth. The BS can allocate a CORESET to each UE, and control information can be sent through the allocated CORESET. In NR, the UE can receive control information from the BS without having to receive the entire system frequency band.

[0096] The CORESET may include a UE-specific CORESET for transmitting UE-specific control information and a common CORESET for transmitting control information common to all UEs.

[0097] On the other hand, depending on the application field, NR may require high reliability. In this case, compared with the prior art, the target block error rate (BLER) of downlink control information (DCI) transmitted through a downlink control channel (e.g., a physical downlink control channel (PDCCH)) can be significantly reduced. As an example of a method for meeting the requirement for 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. At this time, the 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 space domain.

[0098] In NR, the following technologies / features can be applied.

[0099] <Self-contained subframe structure>

[0100] Fig. 9 An example of a frame structure for a new radio access technology is illustrated.

[0101] In NR, such as Fig. 9 As shown in , the structure in which the control channel and the data channel are time-division multiplexed within one TTI can be regarded as a frame structure in order to minimize the waiting time.

[0102] exist Fig. 9 In the figure, the shaded area represents the downlink control region, and the black part represents the uplink control region. The unmarked area can be used to transmit downlink data (DL data), or can be used to transmit uplink data (UL data). The characteristic of this structure is that downlink (DL) transmission and uplink (UL) transmission are performed sequentially within one subframe, DL data can be sent within the subframe, and UL ACK / NACK (acknowledgement / non-acknowledgement) can also be received. Therefore, the time required to resend data when an error occurs in data transmission is reduced, thereby minimizing the waiting time for the final data transmission.

[0103] In the subframe structure of data and control TDM, a time gap may be required for the base station and UE to switch from the transmission mode to the reception mode or from the reception mode to the transmission mode. To this end, some OFDM symbols when DL switches to UL can be set as a guard period (GP) in a self-contained subframe structure.

[0104] Fig.10 The structure of a self-contained time slot is illustrated.

[0105] In the NR system, a time slot contains a DL control channel, DL or UL data, a UL control channel, etc. For example, the first N symbols in the time slot (hereinafter, the DL control region) can be used to send the DL control channel, and the last M symbols in the time slot (hereinafter, the UL control region) can be used to send the UL control channel. N and M are both integers greater than or equal to 0. The resource region (hereinafter, the data region) located between the DL control region and the UL control region can be used for DL ​​data transmission or UL data transmission. For example, the following configuration can be considered. List the time periods in chronological order.

[0106] 1. DL configuration only,

[0107] 2. UL configuration only,

[0108] 3. Hybrid UL-DL configuration,

[0109] -DL area + GP (guard period) + UL control area,

[0110] -DL control area + GP + UL area.

[0111] DL area: (i) DL data area, (ii) DL control area + DL data area

[0112] UL region: (i) UL data region, (ii) UL data region + UL control region.

[0113] In the DL control region, the PDCCH may be transmitted, and in the DL data region, the physical downlink shared channel (PDSCH) may be transmitted. In the UL control region, the physical uplink control channel (PUCCH) may be transmitted, and in the UL data region, the physical uplink shared channel (PUSCH) may be transmitted. Downlink control information (DCI), such as DL data scheduling information or UL data scheduling information, etc., may be transmitted on the PDCCH. Uplink control information (UCI), such as ACK / NACK information for DL ​​data, channel state information (CSI) information, or scheduling request (SR), may be transmitted on the PUCCH. GP provides a time gap in the process of switching the gNB and UE from TX mode to RX mode or in the process of switching the gNB and UE from RX mode to TX mode. Some symbols within a subframe when switching from DL to UL may be configured as GP.

[0114] <Analog Beamforming #1>

[0115] The wavelength is shortened to millimeter waves (mmW), so a large number of antenna elements can 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 5×5 cm panel in a two-dimensional array at intervals of 0.5λ (wavelength). Therefore, a large number of antenna elements can be used in mmW to increase beamforming (BF) gain to increase coverage or improve throughput.

[0116] In this case, if a transceiver unit (TXRU) is provided to adjust the transmit power and phase of each antenna element, independent beamforming for each frequency resource can be performed. However, installing a TXRU for all approximately 100 antenna elements is inefficient in terms of cost. Therefore, a method of mapping a large number of antenna elements to one TXRU using an analog phase shifter and controlling the beam direction is considered. This analog beamforming can form only one beam direction in all frequency bands, and therefore cannot provide frequency selective beamforming.

[0117] Hybrid beamforming (BF) with fewer than B TXRUs than Q antenna elements can be considered an intermediate form of digital BF and analog BF. In this case, the number of directions of beams that can be transmitted simultaneously is limited to B, although the number depends on the method of connecting the B TXRUs and the Q antenna elements.

[0118] <Analog Beamforming #2>

[0119] When multiple antennas are used in NR, hybrid beamforming, which is a combination of digital beamforming and analog beamforming, occurs. Here, in analog beamforming (or RF beamforming), the RF end performs precoding (or combining), so it is possible to achieve performance similar to digital beamforming while reducing the number of RF chains and the number of 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 to be sent at the transmitting end can be represented by an N×L matrix, and the converted N digital signals are converted into analog signals via the TXRU, and analog beamforming represented by the M×N matrix is ​​applied.

[0120] System information of the NR system can be transmitted in a broadcast manner. In this case, in one symbol, analog beams belonging to different antenna panels can be transmitted simultaneously. A scheme of introducing a beam RS (BRS), which is a reference signal (RS) transmitted by applying a single analog beam (corresponding to a specific antenna panel), is being discussed to measure the channel of each analog beam. 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 BRS, a synchronization signal or xPBCH can be transmitted by applying all analog beams within the analog beam group so as to be correctly received by any UE.

[0121] In NR, in the time domain, a synchronization signal block (SSB, or also referred to as a synchronization signal and physical broadcast channel (SS / PBCH)) may consist of 4 OFDM symbols indexed in ascending order from 0 to 3 within the synchronization signal block, and a PBCH associated with a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a demodulation reference signal (DMRS) may be mapped to the symbols. As described above, a synchronization signal block may also be represented by a SS / PBCH block.

[0122] In NR, since multiple synchronization signal blocks (SSBs) can be transmitted at different times respectively and SSBs can be used to perform initial access (IA), serving cell measurement, etc., it is preferred to transmit SSBs first when the transmission time and resources of SSBs overlap with the transmission time and resources of other signals. For this purpose, the network can broadcast the transmission time and resource information of SSBs, or indicate them through UE-specific RRC signaling.

[0123] In NR, beams can be used for both transmission and reception. If the reception performance of the current serving beam deteriorates, a process of searching for a new beam through so-called beam failure recovery (BFR) can be performed.

[0124] Since the BFR process is not intended to declare an error or failure of the link between the network and the UE, it can be assumed that the connection with the current serving cell is maintained even if the BFR process is performed. During the BFR process, measurements of different beams configured by the network (which can be represented in terms of CSI-RS ports or synchronization signal block (SSB) indexes) can be performed, and the best beam for the corresponding UE can be selected. The UE can perform the BFR process in such a way that it performs RACH processing associated with the beam that produces good measurement results.

[0125] Now, a transmission configuration indicator (hereinafter, TCI) state will be described. The TCI state may be configured for each CORESET of a control channel, and a parameter for determining an RX beam of a UE may be determined based on the TCI state.

[0126] For each DL BWP of the serving cell, the UE may be configured for three or fewer CORESETs. In addition, the UE may receive the following information for each CORESET.

[0127] 1) a CORESET index p (e.g., one of 0 to 11, where the index of each CORESET can be uniquely determined in the BWP of one serving cell),

[0128] 2) PDCCH DM-RS scrambling sequence initialization value,

[0129] 3) the duration of the CORESET in the time domain (which can be given in symbols),

[0130] 4) Resource block collection,

[0131] 5) CCE to REG mapping parameters,

[0132] 6) Antenna port quasi co-location, which indicates the quasi co-location (QCL) information of the DM-RS antenna ports for receiving PDCCH in each CORESET (from a set of antenna port quasi co-location provided by a higher layer parameter called "TCI-State"),

[0133] 7) Indication of the presence of a Transmission Configuration Indication (TCI) field for a specific DCI format transmitted by PDCCH in CORESET, etc.

[0134] QCL will be described. If the characteristics of the channel through which the symbols on one antenna port are transmitted can be inferred from the characteristics of the channel through which the symbols on the other antenna port are transmitted, 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 to which the same / similar spatial filters are applied, the two signals may experience the same / similar channel states. From the perspective of the receiver, when one of the two signals is received, the other signal can be detected by using the channel characteristics of the received signal.

[0135] In this sense, when signal A and signal B are said to be quasi co-located (QCL), this may mean that signal A and signal B experience similar channel conditions, and therefore, channel information estimated to detect signal A is also useful for detecting signal B. Herein, channel conditions may be defined according to, for example, Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameters, and the like.

[0136] The "TCI-State" parameter associates one or two downlink reference signals with the corresponding QCL type (QCL types A, B, C and D, see Table 4).

[0137] [Table 4]

[0138] QCL Type describe QCL-Type A Doppler shift, Doppler spread, average delay, delay spread QCL-Type B Doppler shift, Doppler spread QCL-Type C Doppler shift, average delay QCL-Type D Space Rx parameters

[0139] Each "TCI-State" may include parameters for configuring a QCL relationship between one or two downlink reference signals and a DM-RS port of a PDSCH (or PDDCH) or a CSI-RS port of a CSI-RS resource.

[0140] In addition, for each DL BWP configured for the UE in one serving cell, the UE may be provided with 10 (or less) search space sets.For each search space set, the UE may be provided with at least one of the following information.

[0141] 1) Search space set index s (0≤s<40), 2) Association between CORESET p and search space set s, 3) PDCCH monitoring periodicity and PDCCH monitoring offset (time slot unit), 4) PDCCH monitoring pattern within a time slot (e.g., indicating the first symbol of the CORESET in the time slot used for PDCCH monitoring), 5) The number of time slots in which there is search space set s, 6) The number of PDCCH candidates for each CCE aggregation level, 7) Information indicating whether the search space set s is CSS or USS.

[0142] In NR, CORESET#0 may be configured via PBCH (or UE-specific signaling for handover or PSCell configuration or BWP configuration). Search Space (SS) Set #0 configured via PBCH may monitor offsets (e.g., slot offsets, symbol offsets) that are different for each associated SSB. This may be required to minimize the search space opportunities monitored by the UE. Alternatively, this may be required to provide a beam scanning control / data region capable of performing control / data transmission on a per-beam basis in order to persistently perform communication with the UE in a situation where the UE's best beam changes dynamically.

[0143] Fig.11 Physical channels and typical signal transmission are illustrated.

[0144] Reference Fig.11 In a wireless communication system, a UE receives information from a BS through a downlink (DL), and the UE transmits information to the BS through an uplink (UL). The information transmitted / received by the BS and the UE includes data and various control information, and there are various physical channels according to the type / purpose of the information transmitted / received by the BS and the UE.

[0145] A UE that is powered on again in a power-off state or newly enters a cell performs an initial cell search operation such as adjusting synchronization with the BS (S11). To this end, the UE receives a primary synchronization channel (PSCH) and a secondary synchronization channel (SSCH) from the BS to adjust synchronization with the BS and acquire information such as a cell identity (ID). In addition, the UE may receive a physical broadcast channel (PBCH) from the BS to acquire broadcast information in the cell. In addition, the UE may receive a downlink reference signal (DL RS) in the initial cell search step to identify a downlink channel state.

[0146] (Initial) cell search is the process by which a UE acquires time and frequency synchronization with a cell and detects the cell ID of the cell. The cell search may be based on the primary and secondary synchronization signals of the cell, and the PBCH DMRS.

[0147] After completing the initial cell search, the UE may receive a physical downlink control channel (PDCCH) and a corresponding physical downlink shared channel (PDSCH) to acquire more specific system information (S12).

[0148] Thereafter, the UE may perform a random access procedure to complete access to the BS (S13 to S16). Specifically, the UE may send a preamble through a physical random access channel (PRACH) (S13), and may receive a random access response (RAR) to the preamble through a PDCCH and a PDSCH corresponding thereto (S14). Thereafter, the UE may send a physical uplink shared channel (PUSCH) by using the scheduling information in the RAR (S15), and may perform a contention resolution procedure (which may be referred to as a process of receiving a contention resolution message) similar to the PDCCH and the PDSCH corresponding thereto (S16).

[0149] After performing the above-mentioned process, the UE may 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) confirmation (ACK) / negative ACK (NACK), scheduling request (SR), channel state information (CSI), etc. CSI includes channel quality indicator (CQI), precoding matrix indicator (PMI), rank indication (RI), etc. Typically, UCI is transmitted through PUCCH. However, when control information and data are to be transmitted simultaneously, UCI may be transmitted through PUSCH. In addition, the UE may transmit UCI irregularly through PUSCH according to the request / instruction of the network.

[0150] In order to enable reasonable battery consumption when bandwidth adaptation (BA) is configured, 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, and all other BWPs configured in the UE are deactivated. In a deactivated BWP, the UE does not monitor the PDCCH and does not perform transmissions on the PUCCH, PRACH and UL-SCH.

[0151] For BA, the RX and TX bandwidths of the UE are not necessarily as wide as the bandwidth of the cell and can be adjusted. That is, the width can be commanded to change (e.g., reduced for low activity time periods for power saving), the 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 entire cell bandwidth of a cell is called a bandwidth part (BWP), and a BA is obtained by configuring a BWP for the UE and by notifying the UE of the current active BWP among the configured BWPs. When BA is configured, the UE only needs to monitor the PDCCH on one active BWP. That is, there is no need to monitor the PDCCH on the entire downlink frequency of the cell. The BWP inactivity timer (independent of the DRX inactivity timer mentioned above) is used to switch the active BWP to the default BWP. That is, when the PDCCH decoding is successful, the timer is restarted, and when the timer expires, the timer switches to the default BWP.

[0152] The following describes an integrated access and backhaul link (IAB). Below, for ease of explanation, the proposed method is described based on a new RAT (NR) system, but the scope of the system to which the proposed method is applied can be extended to other systems such as 3GPP LTE / LTE-A systems in addition to the NR system.

[0153] One of the potential technologies aimed at realizing future cellular network configuration scenarios and applications is the technology that supports wireless backhaul and relay links, which enables flexible and high-density deployment of NR cells without proportionally densifying the transport network.

[0154] Compared to LTE, in NR, larger bandwidths are expected to be available with native deployment of massive MIMO or multi-beam systems (e.g., mmWave spectrum), thus creating opportunities for the development and deployment of integrated access and backhaul links. This makes it easier to build dense networks of self-backhauled NR cells defined as multiple control and data channels / processes that provide access to or to the UE in a more integrated manner. Such systems are referred to as integrated access and backhaul links (IAB).

[0155] The following definitions are made in this disclosure.

[0156] -AC(x): access link between node (x) and UE.

[0157] - BH(xy): backhaul link between node (x) and node (y).

[0158] In this case, the node may refer to a donor gNB (DgNB) or a relay node (RN). Here, the DgNB or the donor node may be a gNB that provides a function of supporting a backhaul for an IAB node.

[0159] When there are relay node 1 and relay node 2, and relay node 1 is connected to relay node 2 via a return link and relays 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.

[0160] The technical features described separately in one of the drawings in this specification may be implemented separately or simultaneously.

[0161] The following figures are used to illustrate a specific example of this specification. The names of specific devices or specific signals / messages / fields recorded in the figures are only for illustration, so the technical features of this specification are not limited by the specific names used in the following figures.

[0162] Now, the full-duplex operation will be described.

[0163] In 5G, new types of services such as extended reality (XR), AI-based services, and self-driving cars are emerging. These services have the characteristics of dynamically changing traffic in both downlink (DL) and uplink (UL) directions and require low latency for the traffic (e.g., packets) to be sent. In 5G services, traffic will explode to support these various new use cases.

[0164] Existing semi-static or dynamic TDD UL / DL configurations have limitations such as transmission time delay and interference between operators. Existing FDD methods have limitations in terms of efficient frequency resource utilization in the DL / UL direction. Therefore, in order to achieve low latency and efficient resource utilization in NR, the introduction of full-duplex operation within a single carrier is being discussed.

[0165] Fig.12 An example of how full duplex is applied within a carrier is shown.

[0166] Reference Fig.12 , full-duplex methods include Fig.12 The sub-band level full duplex (hereinafter, which may be referred to as sub-band full duplex or SBFD) shown in (a) of FIG. 1 and may also be considered as in Fig.12 Spectrum shared full-duplex (hereinafter, which may be referred to as SSFD) shown in (b).

[0167] In the case of SBFD, DL and UL are transmitted and received through different frequency resources within the same carrier (eg, carrier #0). That is, for the same time resource, different frequency resources are used in DL and UL.

[0168] In the case of SSFD, DL and UL are transmitted and received through the same or overlapping frequency resources in the same carrier (eg, carrier #0). That is, for the same time resource, the same or overlapping frequency resources can be used in DL and UL.

[0169] This full-duplex (FD) operation can also be used in combination with the existing half-duplex (HD) operation. For example, in the time resources used for the existing half-duplex-based TDD operation, some time resources can be used for full-duplex operation. SBFD or SSFD operation can be performed on the time resources performing full-duplex operation.

[0170] Fig.13 An example in which a time resource operating in half-duplex (HD) and a time resource operating in full-duplex (FD) (eg, SBFD or SSFD) coexist is shown.

[0171] exist Fig.13 In (a), some time resources operating as SBFD (=SBFD) are indicated as SBFD, and some time resources operating as HD are indicated as HD. Fig.13 In (b), some time resources operating as SSFD are indicated as SSFD, and some time resources operating as HD are indicated as HD. The unit of the time resource may be, for example, a time slot or a symbol.

[0172] In the time resources operated as SBFD, some frequency resources are used as DL resources, while other frequency resources are used as UL resources. Between the DL frequency resources and the UL frequency resources, there may be a guard subband that is not used for both DL and UL and is empty. The guard subband may also be referred to as other terms, such as guard frequency resources or guard subcarriers.

[0173] In the time resources using SSFD operation, the entire frequency resource can be used for both DL and UL. Alternatively, in order to reduce the impact of interference from other adjacent carriers (this may be referred to as ACI (adjacent carrier interference)), some frequency resources located at one or both ends of the carrier may not be used for DL ​​and / or UL. That is, one or both ends of the carrier may be used as an unused guard band (guard subband) for both DL and UL. Alternatively, in order to reduce ACI on UL reception, one or both ends of the carrier may be used only for DL ​​transmission.

[0174] In the present disclosure, a time slot resource operating as HD is referred to as an HD time slot, a time slot resource operating as SBFD is referred to as an SBFD time slot, and a time slot resource operating as SSFD is referred to as an SSFD time slot, respectively. SSFD time slots and SSFD time slots are also collectively referred to as FD time slots.

[0175] In the present disclosure, among all frequency resources in time resources operating as FD, for convenience, frequency resources operating in DL may be referred to as DL subbands, and frequency resources operating in UL may also be referred to as UL subbands.

[0176] In the case of 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 in the same time resource.

[0177] Alternatively, only the base station can perform full-duplex operation, while the UE can perform half-duplex operation. The base station can perform DL and UL transmission and reception simultaneously using the same or different frequency resources in the same time resource, but the UE only performs DL reception or UL transmission in a specific time resource. In this case, the base station performs full-duplex operation by performing DL transmission and UL reception with different UEs at the same time.

[0178] The content of the present 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 content of the present disclosure can also be applied even if both the base station and the UE perform / support full-duplex operation.

[0179] Based on the above discussion, the present disclosure proposes a method for setting downlink (DL) resources and uplink (UL) resources for intra-carrier full-duplex operation.

[0180] In the following, the term network may be interpreted as gNB or CU / DU. In addition, the term UE may be interpreted as being replaced by MT (Mobile Terminal, Mobile Termination) of the IAB node.

[0181] A. Characteristics of DL / UL time / frequency resources for SBFD and SSFD operations

[0182] It is assumed that the cell (base station) can perform DL transmission and UL reception in the same time resource in an FD scheme (e.g., SBFD or SSFD). For example, the base station can perform HD operation in a first time resource and perform FD operation in a second time resource (which can be a time resource other than the first time resource).

[0183] The first time resource for performing HD operation performs DL operation or UL operation across frequency resources including the entire system bandwidth. Within the first time resource for performing HD operation, the network performs DL operation through 1-1 time resource and performs UL operation through 1-2 time resource. At this time, 1-1 time resource and 1-2 time resource do not overlap with each other.

[0184] In the second time resource for performing FD operation, the network performs DL operation through all or part of the frequency resources (first frequency resources) in the frequency resources constituting the system frequency band of the cell, and performs UL operation through all or part of the frequency resources (second frequency resources).

[0185] Fig.14 Examples of a first time resource, a second time resource, a first frequency resource, and a second frequency resource are shown.

[0186] Reference Fig.14 (a), in the first time resource (indicated by A), it operates as HD. In the second time resource (indicated by B), for example, it can operate as SBFD. In the first time resource, the resource indicated by DL corresponds to the above-mentioned 1-1 time resource, and the resource indicated by UL corresponds to the above-mentioned 1-2 time resource.

[0187] Reference Fig.14 (b), in the second time resource, the frequency resource used as the DL operation corresponds to the above-mentioned first frequency resource, and the frequency resource used as the UL operation corresponds to the above-mentioned second frequency resource.

[0188] Fig.15 Another example of a first time resource, a second time resource, a first frequency resource, and a second frequency resource is shown.

[0189] Reference Fig.15 (a), in the first time resource (labeled as A), the device operates as half-duplex. In the second time resource (labeled as B), the device can, for example, operate as SSFD. In the first time resource, the resource labeled as DL corresponds to the above-mentioned first time resource, and the resource labeled as UL corresponds to the above-mentioned second time resource.

[0190] Reference Fig.15(b), in the second time resource, the frequency resource for DL ​​and DL+UL operation corresponds to the above-mentioned first frequency resource, and the frequency resource for DL+UL operation corresponds to the above-mentioned second frequency resource.

[0191] The first frequency resource and / or the second frequency resource may have all or some of the following characteristics.

[0192] 1) When performing SBFD operation, the first frequency resource and the second frequency resource do not overlap each other. This is to ensure that DL and UL operations are performed through different frequency resources. At this time, there may be frequency resources that do not correspond to both the first frequency resource and the second frequency resource, and these frequency resources are called protection subbands or protection frequency resources. These protection frequency resources may be required to reduce the interference of DL transmission to UL reception. The protection frequency resource can be located between the first frequency resource and the second frequency resource.

[0193] 2) When performing SSFD operation, the first frequency resource and the second frequency resource may overlap. At this time, there may be frequency resources that do not correspond to both the first frequency resource and the second frequency resource, and these frequency resources are referred to as guard subbands or guard frequency resources. These guard frequency resources may be required to reduce interference of DL transmission on adjacent carriers to UL reception, and / or reduce interference of DL transmission on adjacent carriers to UL reception.

[0194] 3) When performing SBFD operation, the second frequency resource may consist of continuous frequency resources, and the first frequency resource may consist of non-continuous frequency resources. At this time, the first frequency resource may consist of multiple (for example, two) non-continuous sets, and each set may consist of continuous frequency resources. This is to reduce the interference of DL transmission on adjacent carriers to UL resources by placing the second frequency resource used for UL at the center of the frequency resources constituting the cell. Conversely, the first frequency resource may consist of continuous frequency resources, and the second frequency resource may consist of non-continuous frequency resources. At this time, the second frequency resource may consist of multiple (for example, two) non-continuous sets, and each set may consist of continuous frequency resources. This is to reduce the interference of DL transmission on UL resources on adjacent carriers by placing the second frequency resource used for DL ​​at the center of the frequency resources constituting the cell.

[0195] 4) When performing SSFD operation, the second frequency resource may be composed of some frequency resources in the first frequency resource. At this time, the second frequency resource may 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 of DL transmission on adjacent carriers to UL reception.

[0196] The network determines the "first time resource" and the "second time resource" as well as the "first frequency resource" and the "second frequency resource" as described above, and provides some or part of the corresponding information to the UE. The network performs DL transmission to the UE in the "1-1 time resource in the first time" and the "first frequency resource in the second time resource", and performs UL reception from the UE in the "1-2 time resource in the first time resource" and the "second frequency resource in the second time resource".

[0197] The UE may receive some or part of the information about the "first time resource" and the "second time resource" and the "first frequency resource" and the "second frequency resource" from the network, and determine the location of the resources. The UE performs DL reception from the network through all or part of the "1-1 time resource within the first time" and the "first frequency resource within the second time resource", and performs UL transmission to the network through the "1-2 time resource within the first time resource" and the "second frequency resource within the second time resource".

[0198] For FD (SBFD and / or SSFD) operation of a cell, the UE may determine information about time resources (hereinafter referred to as SBFD symbols) for SBFD operation. To this end, information about SBFD symbols may be set from the network to the UE.

[0199] When a specific time resource is set as a time resource (SBFD symbol) operating in SBFD, both DL resources and UL resources may exist in the time resource. In this case, if there is no UL signal to be received by the base station in the time resource, the base station may perform only DL transmission. In the SBFD resource, DL transmission is only in the DL subband. Therefore, even if there is no UL signal transmitted in the UL subband, only DL transmission may be performed in the DL subband.

[0200] In this case, if the base station has no UL transmission to receive, even if the specific time resource is a resource determined as a SBFD symbol, it may consider performing DL transmission outside the DL subband as well as in the DL subband to improve DL throughput. That is, it may consider performing DL transmission in the full frequency band.

[0201] That is, in resources determined as SBFD symbols, it may be considered to fall back to TDD operation, in which DL or UL operation is performed on the entire frequency band, rather than performing SBFD operation on DL / UL subbands.

[0202] The UE can perform the same TDD operation (half-duplex operation) as the existing UE in resources not determined as SBFD symbols. That is, it is possible to perform only DL operation or UL operation by using all frequency resources of a cell.

[0203] In the present disclosure, a time resource operated as SBFD or SBFD symbol may be referred to as a “second time resource.” In addition, in the present disclosure, a time resource operated as TDD, a time resource operated as HD, TDD symbol or HD symbol may be referred to as a “first time resource.”

[0204] The DL subband mentioned in the present disclosure may mean a “first frequency resource.” In addition, the UL subband mentioned in the present disclosure may mean a “second frequency resource.”

[0205] In the existing NR TDD carrier, the base station performs only one operation, downlink or uplink, in a specific time resource. In this case, in the time resource when SSB is transmitted, the base station always operates in the downlink.

[0206] For UEs operating in existing TDD, the following assumptions exist for symbols in which SSB is transmitted.

[0207] 1) SS / PBCH transmission symbols cannot be configured for uplink through TDD configuration (eg, TDD-UL-DL-ConfigCommon and / or TDD-UL-DL-ConfigDedicated).

[0208] 2) SS / PBCH transmission symbols cannot be set as uplink through the SFI (Slot Format Indicator) of DCI format 2_0.

[0209] 3) When SS / PBCH is transmitted in a symbol set to be flexible by TDD configuration (e.g., TDD-UL-DL-ConfigCommon and / or TDD-UL-DL-ConfigDedicated), if the UE's uplink transmission overlaps with the SS / PBCH symbol, uplink transmission is not performed. In the case of SRS, if the flexible symbol overlaps with the SS / PBCH symbol, SRS transmission is not performed in the overlapping symbol.

[0210] In addition, in FD environments such as SBFD and SSFD, from the cell perspective, both DL resources and UL resources can exist in the same time resource. Therefore, the base station can perform uplink reception while transmitting downlink.

[0211] Therefore, even if SS / PBCH is transmitted in a time resource in which a cell performs an FD operation, the base station can perform uplink reception while transmitting SS / PBCH.

[0212] In addition, according to the current standard specification, the UE cannot perform uplink transmission on the symbol resources for transmitting SS / PBCH. In this case, the FDR operation cannot be performed on the SS / PBCH transmission time resources.

[0213] B.TDD Configuration

[0214] According to the existing NR standard specifications, the UE can be configured with "tdd-UL-DL-ConfigCommon" and "tdd-UL-DL-ConfigDedicated" to determine the TDD UL / DL configuration information applied in the cell.

[0215] For example, "tdd-UL-DL-ConfigCommon" may be cell-specifically transmitted through system information, by which the UE may determine the time resources set as DL and the time resources set as UL. The UE determines the time resources not set as DL or UL as flexible (F) resources. That is, flexible resources may be implicitly indicated without being explicitly indicated.

[0216] "tdd-UL-DL-ConfigDedicated" can be specifically sent by the UE via RRC. Through it, the UE can determine the DL / UL information in the time resources determined as flexible by "tdd-UL-DL-ConfigCommon". According to the existing NR standard specification, the information of "tdd-UL-DL-ConfigDedicated" cannot overwrite the DL / UL information in the time resources determined as DL or UL by "tdd-UL-DL-ConfigCommon", and can only overwrite the DL / UL information in the time resources determined as flexible by "tdd-UL-DL-ConfigCommon".

[0217] For time resources that are not set as DL or UL even after the configuration of 'tdd-UL-DL-ConfigDedicated' is applied, the UE determines them as flexible resources.

[0218] Table 5 below shows an example of the existing 'tdd-UL-DL-ConfigCommon'.

[0219] [Table 5]

[0220]

[0221] The following Table 6 shows an example of the existing 'tdd-UL-DL-ConfigDedicated'.

[0222] [Table 6]

[0223]

[0224]

[0225] When the cell operates in full duplex (SBFD or SSFD) and the UE operates in half duplex, the UE performs DL or UL operation in a specific time resource. Therefore, the UE needs to determine the DL / UL information of the UE operation based on the time resource as before. When the cell operates in SBFD / SSFD, the base station can perform DL transmission to UE 1 and UL reception from UE 2 in a specific time resource. To this end, in the above-mentioned specific time resource, the DL / UL information of UE 1 and UE 2 should be different from each other.

[0226] According to the current standard, for time resources set as flexible through "tdd-UL-DL-ConfigCommon", different UL / DL information may be set for each UE using "tdd-UL-DL-ConfigDedicated".

[0227] In addition, for time resources determined as flexible via "tdd-UL-DL-ConfigCommon" and "tdd-UL-DL-ConfigDedicated", the UE can additionally determine the DL / UL information of the corresponding time resources on a UE group-specific or UE-specific basis: i) via the time slot format indication (SFI) in DCI format 2_0 or ii) via the DL / UL scheduling of the base station. These existing operations can be used to set UE-specific DL / UL information for cells operating under SBFD / SSFD.

[0228] However, some actually deployed cells are using static TDD UL / DL modes, and some UEs, taking this into account, are also implemented to apply static TDD UL / DL modes without following standard specifications. For example, the UE may operate assuming a specific fixed TDD configuration without receiving TDD configuration information ("tdd-UL-DL-ConfigCommon" and / or "tdd-UL-DL-ConfigDedicated"). Alternatively, the UE may receive "tdd-UL-DL-ConfigCommon" information, but may not implement any operations to determine additional DL / UL information from flexible resources. In this case, it may be difficult to support full-duplex operation due to the lack of flexible resources that can perform full-duplex operation, resulting in reduced resource utilization efficiency and decreased system throughput.

[0229] Therefore, there is a problem in that if the base station wants to support legacy UEs while performing SBFD / SSFD operations, it should assume a specific "tdd-UL-DL-ConfigCommon" (e.g., DL / DL / DL / DL / UL (=DDDDU) in slot order). In this case, it may not be possible to additionally set / indicate different TDD configurations for each UE via "tdd-UL-DL-ConfigDedicated", SFI of DCI format 2_0, and / or DL / UL scheduled by the base station.

[0230] In view of this, the present disclosure proposes a method for a UE that recognizes / learns about SBFD (which may be referred to as a SBFD-aware UE) to determine a TDD configuration in a cell during an intra-carrier full-duplex operation.

[0231] Hereinafter, description is made assuming that the cell supports / performs SBFD operation, which simultaneously performs DL and UL in the same time resource using different frequency resources (subbands). However, the content of the present disclosure can also be applied to the case where the cell supports / performs SSFD operation.

[0232] i) the base station may perform full-duplex (FD) operation and the UE may perform half-duplex (HD) operation, or ii) the base station may perform half-duplex operation and the UE may perform full-duplex operation. Alternatively, both the base station and the UE may support full-duplex operation.

[0233] A UE that recognizes / knows that a base station can perform full-duplex operation may be referred to as an FD-aware UE. A UE that knows that a base station can perform SBFD operation may be referred to as an SBFD-aware UE. A UE that knows that a base station can perform SSFD operation may be referred to as an SSFD-aware UE.

[0234] When a base station supports both half-duplex and full-duplex operations, it may inform the UE of the time, frequency, or both time and frequency at which it is capable of performing (or is expected to perform or intends to perform) half-duplex and full-duplex operations.

[0235] If the base station is capable of performing SSFD operation, in the case of a full-duplex base station, this may mean that simultaneous UL reception is possible on part / all of the frequency resources of the base station that can be used for DL ​​transmission. That is, in some frequency resources, not only DL transmission / reception but also UL reception / transmission can be performed. In this case, in the case of SSFD, information about frequency resources capable of SSFD and information about time resources capable of SSFD can be transmitted.

[0236] In case of a full-duplex UE, simultaneous UL transmission may be possible on part and / or all of the frequency resources on which the UE is capable of DL reception.

[0237] The following describes a method for indicating time ( / frequency) resource information for performing SBFD, but this method can also be used when the base station indicates time ( / frequency) resources for performing SSFD when half-duplex and SSFD operations are possible.

[0238] 1) When the UE performs DL reception in SBFD symbols:

[0239] i) The UE may perform DL reception using frequency resources within a DL subband. The UE may perform DL reception using frequency resources within a DL subband within a DL BWP.

[0240] ii) The UE does not perform DL reception in frequency resources other than the DL subband. The UE does not perform DL reception using frequency resources other than the DL subband within the DL BWP.

[0241] 2) When the UE performs UL transmission in SBFD symbols:

[0242] i) The UE may perform UL transmission using frequency resources within the UL subband. The UE may perform UL transmission using frequency resources within the UL subband within the UL BWP.

[0243] ii) The UE does not perform UL transmission in frequency resources other than the UL subband. The UE does not perform UL transmission using frequency resources other than the UL subband within the UL BWP.

[0244] Generally, the UE can perform DL reception in the DL subband and UL transmission in the UL subband in the time resources in which it determines that the cell operates in SBFD. However, in the time resources in which it determines that the cell operates in SBFD, if the base station performs only DL transmission or UL reception, or when necessary, the base station may consider performing DL transmission or UL reception on the entire frequency band (capable of receiving DL or UL scheduling).

[0245] Existing legacy UEs cannot change DL / UL information through "tdd-UL-DL-ConfigDedicated" in resources determined as DL or UL through "tdd-UL-DL-ConfigCommon" from a cell. The present disclosure proposes a method for an enhanced UE (e.g., SBFD-aware UE) operating in a cell operating with SBFD to determine TDD UL / DL configuration in a cell, which is different from a legacy UE.

[0246] <Overwrite Operation Suggestions>

[0247] The present disclosure proposes a behavior of a SBFD-aware UE overriding the TDD configuration information set by “tdd-UL-DL-ConfigCommon”, as shown below.

[0248] Method 1: The SBFD-aware UE uses other TDD configurations to cover the DL / UL information determined by the “tdd-UL-DL-ConfigCommon” configured by the cell.

[0249] Here, other TDD configurations that override the DL / UL information determined by setting "tdd-UL-DL-ConfigCommon" may be the same as "tdd-UL-DL-ConfigDedicated" for existing equipment. In other words, if an SBFD-aware UE receives DL / UL / F information for a specific time resource via "tdd-UL-DL-ConfigDedicated", the information may override the information set on the time resource via "tdd-UL-DL-ConfigCommon". For example, if a specific symbol is set to DL via "tdd-UL-DL-ConfigCommon" and then set to flexible or UL via "tdd-UL-DL-ConfigDedicated", the UE may apply the information from "tdd-UL-DL-ConfigDedicated" on the symbol to determine that the symbol is a UL resource.

[0250] Alternatively, the other TDD configuration that overwrites the DL / UL information determined by setting "tdd-UL-DL-ConfigCommon" may be a new configuration (i.e., "TDD-UL-DL-ConfigDedicated-DE") set for the SBFD-aware UE. That is, it may be a new configuration that is different from the existing "tdd-UL-DL-ConfigDedicated". In this case, when the SBFD-aware UE is configured with DL / UL / F information for a specific time resource through "TDD-UL-DL-ConfigDedicated-DE", the information may overwrite the information set through "tdd-UL-DL-ConfigCommon" for the specific time resource. In other words, the existing "tdd-UL-DL-ConfigDedicated" cannot change the DL / UL information of the resources set as DL or UL through "tdd-UL-DL-ConfigCommon", but in the case of "TDD-UL-DL-ConfigDedicated-DE", it may overwrite the information set through "tdd-UL-DL-ConfigCommon". When SBFD perceives that the UE is configured with 'TDD-UL-DL-ConfigDedicated-DE', it may determine DL / UL information using 'TDD-UL-DL-ConfigDedicated-DE' without applying the 'TDD-UL-DL-ConfigDedicated' information.

[0251] Method 2: SBFD aware UE applies TDD configuration except “tdd-UL-DL-ConfigCommon”.

[0252] SBFD-aware UEs may be configured with TDD configurations for SBFD-aware UEs that are separate from “tdd-UL-DL-ConfigCommon”. For example, these TDD configurations may be sent as part of system information. When such a configuration is referred to as “TDD-UL-DL-ConfigCommon-DE”, the SBFD-aware UE may determine the DL / UL information in the cell by applying “TDD-UL-DL-ConfigCommon-DE” instead of “tdd-UL-DL-ConfigCommon” when “TDD-UL-DL-ConfigCommon-DE” is set. That is, “TDD-UL-DL-ConfigCommon-DE” is considered a valid configuration. In addition, if the UE determines the DL / UL information in the cell by applying the “TDD-UL-DL-ConfigCommon-DE” information, the DL / UL information in the time resources that are not set as DL or UL (determined as flexible) by “TDD-UL-DL-ConfigCommon-DE” may be overwritten by “tdd-UL-DL-ConfigDedicated”.

[0253] Alternatively, the SBFD-aware UE may be configured with a TDD configuration for the SBFD-aware UE that is separate from “tdd-UL-DL-ConfigDedicated”. For example, these TDD configurations may be set via RRC. When such a configuration is referred to as “TDD-UL-DL-ConfigDedicated-DE”, the SBFD-aware UE may ignore the “tdd-UL-DL-ConfigCommon” and “tdd-UL-DL-ConfigDedicated” information in all time resources and apply “TDD-UL-DL-ConfigDedicated-DE” to determine the DL / UL information in the cell. In other words, when the SBFD-aware UE is configured with the “TDD-UL-DL-ConfigDedicated-DE” configuration, it may assume all time resources as flexible symbols and overwrite the “TDD-UL-DL-ConfigDedicated-DE” information to determine the DL / UL information in the cell.

[0254] <time resource to perform overwrite>

[0255] As in the above method 1, the operation of the UE overwriting the information set by "tdd-UL-DL-ConfigCommon" by using "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE" may be applicable only to the following time resources.

[0256] Option 1. It can be applied to the entire time resource. That is, for symbols set to DL or UL and flexible via "tdd-UL-DL-ConfigCommon", the UE can cover the DL / UL information with the information set by "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE".

[0257] Option 2. It is only applicable to DL or flexible symbols. That is, for symbols set to DL or flexible through "tdd-UL-DL-ConfigCommon", the UE can use the information set through "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE" to cover the DL / UL information. On the other hand, the UE cannot use the information set through "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE" to cover the symbols set to UL through "tdd-UL-DL-ConfigCommon". This is to prevent interference to UL signals on adjacent carriers by performing SBFD operations on existing uplink symbols.

[0258] Option 3. It is only applicable to flexible symbols, that is, for symbols set as flexible via "tdd-UL-DL-ConfigCommon", the UE can use the information set by "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE" to cover the DL / UL information. On the other hand, the UE cannot use the information set by "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE" to cover the symbols set as DL or UL via "tdd-UL-DL-ConfigCommon". This is to maintain the principle of not changing the link direction of resources determined as DL or UL in the existing standard specifications, and to reuse the content of the existing standard specifications as much as possible.

[0259] Option 4. It applies to time resources set or determined as SBFD symbols. SBFD symbols may mean symbols in which the cell performs SBFD operation. The UE may be configured with information about time resources in which the cell performs SBFD operation from the network, and determine the time resources in which the cell performs SBFD operation based on the information. For SBFD symbols determined in this way, the UE may overwrite the DL / UL information with information set via "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE".

[0260] In addition, the UE may be configured from the network through high-layer signaling information about which method the UE will use in Option 2 or Option 3. According to these configurations, the UE may determine the time resources for performing coverage by applying the method of Option 2 or Option 3.

[0261] <Frequency resource to perform overlay>

[0262] In addition, operations such as method 1 or method 2 may be applied only to specific frequency resources, as shown below.

[0263] That is, the UE may apply the TDD configuration determined by method 1 or method 2 for specific frequency resources, and apply the TDD configuration determined by "tdd-UL-DL-ConfigCommon" for the remaining frequency resources as before.

[0264] At this time, the UE may configure information about these specific frequency resources from the base station through system information or RRC message.

[0265] In this case, from a UE's perspective, for the same time resource, the DL / UL information for each frequency resource may be different. At this time, the UE may determine the time resource as a symbol capable of SBFD or SSFD operation.

[0266] In this case, for UEs operating in half-duplex, a method for determining whether to operate in the DL or UL direction in symbols capable of SBFD or SSFD operation is additionally required. On the other hand, for UEs operating in full-duplex, symbols capable of SBFD or SSFD operation can be determined as resources capable of performing both DL and UL.

[0267] <DL / UL / F (=D / U / F) information that can be set via overlay>

[0268] When the UE overwrites the information set through "tdd-UL-DL-ConfigCommon" through "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE" as in the above method 1, the DL / UL information to be overwritten may be limited as follows:

[0269] 1) For resources set as flexible via "tdd-UL-DL-ConfigCommon",

[0270] i) It can be maintained as flexible or can be overridden as DL or UL through "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE".

[0271] ii) In addition, considering UEs operating in full-duplex, it can be covered as a new resource direction type (ie, X (bidirectional)), which can operate in both DL and UL directions simultaneously.

[0272] 2) For resources set to DL via "tdd-UL-DL-ConfigCommon",

[0273] Option 1. It can be maintained as DL or can be overridden as UL through "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE".

[0274] Option 2. It can be maintained as DL or can be overridden as UL or flexible through "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE".

[0275] Furthermore, considering a UE operating in full-duplex, it can be covered as a new resource direction type, namely X (bidirectional), which can operate in both DL and UL directions simultaneously.

[0276] 3) For resources set to UL via "tdd-UL-DL-ConfigCommon":

[0277] Option 1. It can be maintained as UL or can be overridden as DL through "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE".

[0278] Option 2. Either it can be maintained as UL or can be overridden as DL or flexible through "tdd-UL-DL-ConfigDedicated" or "TDD-UL-DL-ConfigDedicated-DE".

[0279] Option 3. Or it can only be maintained as UL and cannot be overridden as DL or flexible.

[0280] In addition, for the above-mentioned Option 1 and Option 2, considering UEs operating in full-duplex, they can be covered as a new resource direction type (ie, X (bidirectional)), which can operate in DL and UL directions at the same time.

[0281] <Overwrite operation method>

[0282] Existing UEs can be configured with time slot configuration information through "tdd-UL-DL-ConfigCommon", which is DL and UL symbol information for multiple time slot resources. These configurations allow specific symbols to be set to DL or UL, or to be set to DL or not set to DL.

[0283] In the present disclosure, symbols set to DL by "tdd-UL-DL-ConfigCommon" are referred to as cell-specific DL symbols. Symbols set to UL by "tdd-UL-DL-ConfigCommon" are referred to as cell-specific UL symbols. Symbols not set to DL or UL by "tdd-UL-DL-ConfigCommon" are referred to as cell-specific F (flexible) symbols.

[0284] For existing UEs, the cell-specific F symbol can be set as DL or UL through "tdd-UL-DL-ConfigDedicated".

[0285] If the UE sets the cell-specific F symbol as DL through "tdd-UL-DL-ConfigDedicated", the UE determines the symbol as a DL symbol. It is determined that the above DL symbol can be used for DL ​​reception of the UE but not for UL transmission.

[0286] If the UE sets the cell-specific F symbol to UL through "tdd-UL-DL-ConfigDedicated", the UE determines the symbol as a UL symbol. It is determined that the UL symbol is not used for DL ​​reception of the UE but can be used for UL transmission.

[0287] If the UE does not set the cell-specific F symbol to DL or UL through "tdd-UL-DL-ConfigDedicated", the UE determines the symbol as a flexible (F) symbol. The UE determines that the F symbol can be used for DL ​​reception or UL transmission through future signaling / scheduling, etc.

[0288] When a cell performs SBFD operation, all or part of the cell-specific DL symbols and / or cell-specific F symbols may be set as SBFD symbols. In this case, the UE may perform DL or UL operation in the resources set as SBFD symbols. To this end, a method is proposed for enabling the UE to perform DL or UL operation even if the symbol is indicated as DL when the cell-specific DL symbol is set / determined as a SBFD symbol.

[0289] When a cell-specific DL symbol (eg, a symbol set to DL by "tdd-UL-DL-ConfigCommon") is set / determined as a SBFD symbol, the UE may perform DL or UL operation in the symbol.

[0290] For cell-specific DL symbols, UE,

[0291] i) If it is indicated as DL by "tdd-UL-DL-ConfigDedicated", the UE determines the symbol as a DL symbol. The UE determines that the symbol is used for DL ​​reception and not for UL transmission.

[0292] ii) If it is indicated as UL by "tdd-UL-DL-ConfigDedicated", the UE determines the symbol as a UL symbol. The UE determines that the symbol is used for UL transmission and is not used for DL ​​reception.

[0293] iii) If the symbol is not indicated as DL or UL by "tdd-UL-DL-ConfigDedicated", the UE determines the symbol as a flexible (F) symbol. Alternatively, if "tdd-UL-DL-ConfigDedicated" is not set, the UE determines the symbol as an F symbol.

[0294] The UE determines that the symbol can be used for DL ​​reception or UL transmission through subsequent signaling / scheduling, etc.

[0295] <Conditions for performing overwrite operation>

[0296] In case of SBFD-aware UE, it is desirable to perform the above-mentioned operation of overriding the information set by "tdd-UL-DL-ConfigCommon" only when the cell performs SBFD operation. Considering this, it is proposed to apply the above disclosure in the following cases.

[0297] Option 1. If the UE determines / identifies that the cell is a cell that performs SBFD operation, it can perform the coverage operation. To this end, for example, if the cell operates in SBFD, the UE can obtain the information through system information or RRC configuration.

[0298] If the UE determines (or learns) through these configurations that the cell is a cell that performs SBFD operation, the UE may determine the TDD configuration by applying the above-disclosed proposals; otherwise, the UE may determine the TDD configuration like a conventional UE.

[0299] Option 2. If the UE is instructed by the cell to override "tdd-UL-DL-ConfigCommon" as proposed above, it may perform such an override operation. To this end, the UE may be configured with information on how to determine the TDD configuration through system information or RRC configuration.

[0300] If the UE is instructed by these configurations to overwrite "tdd-UL-DL-ConfigCommon" as per the above recommendations, the UE may apply the above disclosed recommendations to determine the TDD configuration, otherwise, it may determine the TDD configuration like a legacy UE.

[0301] Option 3. When the UE is configured with a TDD configuration that is set only for SBFD-aware UEs (e.g., "TDD-UL-DL-ConfigCommon-DE" or "TDD-UL-DL-ConfigDedicated-DE"), the UE determines that the cell is a cell that performs SBFD behavior and can use this TDD configuration to perform coverage operations as proposed above. Otherwise, it can determine the TDD configuration like a conventional UE.

[0302] <Period of "tdd-UL-DL-ConfigDedicated">

[0303] When the existing UE determines the semi-static TDD configuration via “tdd-UL-DL-ConfigCommon” and “tdd-UL-DL-ConfigDedicated”, the periodicity of the TDD configuration will be the periodicity of “tdd-UL-DL-ConfigCommon” (ie, “dl-UL-TransmissionPeriodicity”).

[0304] Even if the “tdd-UL-DL-ConfigCommon” information is overwritten by “tdd-UL-DL-ConfigDedicated” or “TDD-UL-DL-ConfigDedicated-DE” as proposed above, the periodicity of the semi-static TDD configuration may follow the periodicity of “tdd-UL-DL-ConfigCommon”.

[0305] The periodicity of "tdd-UL-DL-ConfigCommon" (i.e., "dl-UL-TransmissionPeriodicity") supports various values ​​in the standard, but in the case of some actually deployed UEs, it can be implemented and operated by applying a TDD UL / DL mode that is fixed to a specific 5 millisecond (ms) period. To support these legacy UEs, "tdd-UL-DL-ConfigCommon" needs to operate with a fixed period of 5 milliseconds. In this case, the TDD configuration of the SBFD-aware UE may also have to have a fixed period of 5 milliseconds. SBFD-aware UEs with a TDD configuration period limited to 5 milliseconds may be less efficient in terms of network operation and resource utilization.

[0306] In the present disclosure, a method for supporting flexible TDD configuration for SBFD-aware UE is proposed. To this end, when setting "tdd-UL-DL-ConfigDedicated" and "TDD-UL-DL-ConfigDedicated-DE" to the SBFD-aware UE, the following settings are recommended. Hereinafter, for convenience, "tdd-UL-DL-ConfigDedicated" and "TDD-UL-DL-ConfigDedicated-DE" may be collectively referred to as "tdd-UL-DL-ConfigDedicated".

[0307] In the present disclosure, it is proposed to apply different "tdd-UL-DL-ConfigDedicated" information for each period of "tdd-UL-DL-ConfigCommon". That is, when the UE is configured with DL / UL information for a specific time resource through "tdd-UL-DL-ConfigDedicated", it can apply the corresponding DL / UL information only in specific or some periods of "tdd-UL-DL-ConfigCommon". For example, if the UE is configured with configuration information via "tdd-UL-DL-ConfigDedicated" that sets DL / UL information on a specific time resource, the information may be applied only to odd periods of "tdd-UL-DL-ConfigCommon". On the other hand, another DL / UL configuration information may be applied only to even periods of "tdd-UL-DL-ConfigCommon".

[0308] To this end, when setting 'tdd-UL-DL-ConfigDedicated', information on the period and / or offset to which the 'tdd-UL-DL-ConfigDedicated' configuration is applied may be set together.

[0309] According to the implementation relaxation, the periodicity information may be equal to K times the periodicity of "tdd-UL-DL-ConfigCommon" (i.e., "dl-UL-TransmissionPeriodicity"). In this case, K may be a positive integer. Alternatively, K may be equal to 2 K’ (K' is a non-negative integer).

[0310] Specifically, the offset information can be one of the values ​​obtained by multiplying the period of "tdd-UL-DL-ConfigCommon" (i.e., "dl-UL-TransmissionPeriodicity") by 0, 1, ..., K-1. In order to set the offset information, P_o = 0, 1, ..., K-1 can be set. In this case, the UE can determine the offset value by applying P_o * "period of TDD-UL-DL-ConfigCommon" value.

[0311] Specifically, the period and / or offset information may be set as follows:

[0312] Option 1. When "tdd-UL-DL-ConfigDedicated" is set, the period and / or offset information to which the "tdd-UL-DL-ConfigDedicated" is applied may be set together with it. In this case, an independent "tdd-UL-DL-ConfigDedicated" may be set for each offset, that is, multiple "tdd-UL-DL-ConfigDedicated" may be set, and corresponding offset information may be set for each "tdd-UL-DL-ConfigDedicated".

[0313] To this end, offset information applied by the corresponding "tdd-UL-DL-ConfigDedicated" may be set for each "tdd-UL-DL-ConfigDedicated". The UE may apply "tdd-UL-DL-ConfigDedicated" within a time period corresponding to the offset value based on the period of application of "tdd-UL-DL-ConfigDedicated".

[0314] In this case, the period information may be set for each “tdd-UL-DL-ConfigDedicated.” Alternatively, all “tdd-UL-DL-ConfigDedicated” may apply the same period, in which case the period information may be set in “ServingCellConfig” in which “tdd-UL-DL-ConfigDedicated” is set.

[0315] Fig.16 The period of "tdd-UL-DL-ConfigCommon", the period of "tdd-UL-DL-ConfigDedicated", and the offset are shown.

[0316] Reference Fig.16, there may be a period of "tdd-UL-DL-ConfigCommon" and a period of "tdd-UL-DL-ConfigDedicated". At this time, in the case of "tdd-UL-DL-ConfigDedicated" with the offset value set to 0, it is applied to the period duration of the 0th (or even-numbered) "tdd-UL-DL-ConfigCommon" within each period of "tdd-UL-DL-ConfigDedicated". In the case of "tdd-UL-DL-ConfigDedicated" with the offset value set to 1, it is applied to the period duration of the 1st (or odd-numbered) "tdd-UL-DL-ConfigCommon" within each period of "tdd-UL-DL-ConfigDedicated".

[0317] Option 2. When setting "TDD-UL-DL-SlotConfig" (which sets DL / UL information for each time slot in "tdd-UL-DL-ConfigDedicated"), the offset information can be set together in the "TDD-UL-DL-SlotConfig" configuration. That is, the offset information corresponding to each "TDD-UL-DL-SlotConfig" configuration can be set together. In this case, the "TDD-UL-DL-SlotConfig" information can be applied only within the corresponding offset duration.

[0318] For example, the period information can be set in the "TDD-UL-DL-SlotConfig" configuration. Alternatively, all "TDD-UL-DL-SlotConfigs" can apply the same period. In this case, the period information can be set in "tdd-UL-DL-ConfigDedicated".

[0319] For example, Fig.16As shown, there may be a period of "tdd-UL-DL-ConfigCommon" and a period of "tdd-UL-DL-ConfigDedicated". At this time, in the case of "TDD-UL-DL-SlotConfig" with an offset value set to 0, it is applied to the period duration of the 0th (or even-numbered) "tdd-UL-DL-ConfigCommon" in each "tdd-UL-DL-ConfigDedicated" period. For "TDD-UL-DL-SlotConfig" with an offset value set to 1, it is applied to the period duration of the 1st (or odd-numbered) "tdd-UL-DL-ConfigCommon" in each "tdd-UL-DL-ConfigDedicated" period.

[0320] In summary, for SBFD-aware UE, the present disclosure may be operated as follows.

[0321] When the UE is configured with "tdd-UL-DL-ConfigDedicated" from the network, the UE determines to use the link direction (e.g., DL, UL, F) information set by "tdd-UL-DL-ConfigDedicated" to overwrite the link direction information in the symbols determined as DL or flexible (i.e., symbols not determined as UL) by "tdd-UL-DL-ConfigCommon".

[0322] In addition, the "tdd-UL-DL-ConfigDedicated" configured to the UE may be an additional configuration (i.e., "TDD-UL-DL-ConfigDedicated-DE") different from the existing "tdd-UL-DL-ConfigDedicated". When the additional "TDD-UL-DL-ConfigDedicated-DE" is set, the UE may ignore the existing "tdd-UL-DL-ConfigDedicated" information and apply the additional "TDD-UL-DL-ConfigDedicated-DE" information to determine the link direction information in each time resource.

[0323] The above-mentioned "TDD-UL-DL-ConfigDedicated-DE" information may be indicated differently for each period of "tdd-UL-DL-ConfigCommon". In this case, for each period of "tdd-UL-DL-ConfigCommon", the UE determines the link direction information in each time resource by applying the additional "TDD-UL-DL-ConfigDedicated-DE" information associated with the corresponding period.

[0324] When a symbol set or determined by the UE as a SBFD symbol is configured as a DL or UL symbol through "tdd-UL-DL-ConfigDedicated", the UE determines / assumes that the link direction (DL, UL, F) information set through "tdd-UL-DL-ConfigDedicated" is used to overwrite the link direction (DL, UL, F) information in the symbol set / determined through "tdd-UL-DL-ConfigCommon".

[0325] For a symbol set or determined as a SBFD symbol, if the symbol is not set as a DL or UL symbol through "tdd-UL-DL-ConfigDedicated", the UE determines the symbol as a flexible symbol. That is, it is determined that the link direction (DL, UL, F) information in the corresponding symbol set / determined through "tdd-UL-DL-ConfigCommon" is used to cover the flexible coverage.

[0326] In addition, the “tdd-UL-DL-ConfigDedicated” set to the UE may be an additional configuration different from the existing “tdd-UL-DL-ConfigDedicated” (i.e., “TDD-UL-DL-ConfigDedicated-DE” different from the “tdd-UL-DL-ConfigDedicated”). When the additional “TDD-UL-DL-ConfigDedicated-DE” is set, the UE ignores the existing “tdd-UL-DL-ConfigDedicated” information and applies the additional “TDD-UL-DL-ConfigDedicated-DE” information to determine the link direction information in each time resource.

[0327] The above additional "TDD-UL-DL-ConfigDedicated-DE" information may be indicated differently for each period of "tdd-UL-DL-ConfigCommon". In this case, for each period of "tdd-UL-DL-ConfigCommon", the UE determines the link direction information in each time resource by applying the "TDD-UL-DL-ConfigDedicated-DE" information associated with each period.

[0328] According to an embodiment, SBFD symbols may be limited to resources that are not set to UL through 'tdd-UL-DL-ConfigCommon'.

[0329] Fig.17 An operation method of a UE in a wireless communication system is illustrated.

[0330] Reference Fig.17 , the UE receives a full-duplex (FD) configuration message notifying a full-duplex (FD) symbol among a plurality of symbols in a time slot from the network (S171). For example, the FD configuration message may be provided through system information or through a UE-specific RRC message.

[0331] The UE receives a cell-specific common time division duplex (TDD) configuration message from the network (S172). The common TDD configuration message may provide, for example, a time slot format. The time slot format includes a downlink symbol, an uplink symbol, and a flexible symbol.

[0332] For example, the common TDD configuration message may provide a reference subcarrier spacing (SCS) configuration and pattern. The pattern may provide, for example, a slot configuration period (P msec), the number of slots containing only downlink symbols (d slots ), the number of downlink symbols (d sym ), the number of time slots containing only uplink symbols (u slots ) and the number of uplink symbols (u sym ).

[0333] In this case, the above-mentioned time slot configuration period of P msec includes a time slot configuration (μ ref ) of S = P·2 μref Among the above S time slots, the first d slots The time slots contain only downlink symbols and, finally u slots The first d time slots contain only uplink symbols. slots The first d after the time slot sym symbols are downlink symbols. slots u time slots ago symsymbols are uplink symbols. The remaining symbols (i.e., (Sd slots -u slots )·N slot symb -d sym -u sym Symbols) are flexible symbols. slot symb is the number of symbols per time slot.

[0334] The UE receives a UE-specific dedicated TDD configuration message from the network. Here, only for full-duplex symbols among a plurality of symbols, the second direction information indicated by the dedicated TDD configuration message covers the first direction information indicated by the common TDD configuration message (S173).

[0335] If the full-duplex symbol is not set as uplink or downlink by a dedicated TDD configuration message, the full-duplex symbol is determined to be a flexible symbol. That is, the dedicated TDD configuration message may not explicitly indicate that the full-duplex symbol is a flexible symbol. In other words, the dedicated TDD configuration message may indicate downlink symbols or uplink symbols for some full-duplex symbols, and may not indicate downlink symbols or uplink symbols for the remaining full-duplex symbols. Then, the UE can implicitly recognize that the full-duplex symbol that is not indicated as a downlink symbol or an uplink symbol by a dedicated TDD configuration message is indicated as a flexible symbol.

[0336] Among the plurality of symbols, the first direction information indicated by the common TDD configuration message is applied to symbols except the full-duplex symbol.

[0337] In the above-mentioned full-duplex symbol, sub-band full-duplex (SBFD) can be applied, wherein the frequency resources of the symbol include a first sub-band for downlink reception and a second sub-band for uplink transmission, but the first sub-band and the second sub-band do not overlap each other. Alternatively, according to an embodiment, SSFD can also be applied to the full-duplex symbol, which can perform DL and UL transmission and reception through the same frequency resources or overlapping frequency resources within the same carrier.

[0338] The UE may be an SBFD-aware UE capable of recognizing SBFD.

[0339] The dedicated TDD configuration message may be information additional to an existing dedicated TDD configuration message provided to an existing UE that cannot recognize SBFD.

[0340] A different dedicated TDD configuration message may be applied for each period of the common TDD configuration message.

[0341] For example, the first dedicated TDD configuration message may be applied to the first period of the common TDD configuration message, and the second dedicated TDD configuration message may be applied to the second period of the common TDD configuration message.

[0342] The full-duplex symbol may be included in the symbols (D, F symbols) not configured as uplink through the common TDD configuration message among the plurality of symbols. That is, the symbol set as uplink through the common TDD configuration message is not set / indicated as a full-duplex symbol.

[0343] In the above-mentioned full-duplex symbol, the direction indicated by the second direction information is applied instead of the direction indicated by the first direction information.

[0344] The direction indicated by the first direction information is downlink or uplink, and the direction indicated by the second direction information is downlink or uplink.

[0345] Among the plurality of symbols, symbols other than the full-duplex symbol may be half-duplex (HD) symbols, frequency resources of which include downlink resources for downlink reception or uplink resources for uplink transmission.

[0346] Fig.18 A specific example is shown in which the first direction information (determined by sending a common TDD configuration message) is overwritten by the second direction information (determined by sending a TDD configuration message) for a full-duplex symbol among a plurality of symbols.

[0347] Reference Fig.18 , the UE can determine whether multiple symbols are HD symbols or FD symbols based on the FD configuration message.

[0348] It is assumed that the directions of the plurality of symbols 181 to 185 are sequentially set to UDDFD, for example, through a cell-specific TDD configuration message, and it is assumed that the directions of the plurality of symbols 181 to 185 are sequentially set to DUUFD, for example, through a UE-specific TDD configuration message.

[0349] In this case, the UE can determine that the direction of the HD symbol (181) is U, the direction of the FD symbol (182) is U, the direction of the FD symbol (183) is U, the direction of the FD symbol (184) is F, and the direction of the HD symbol (185) is D.

[0350] That is, it is determined that the direction of the cell-specific TDD configuration message (setting) is applied to the HD symbols (181, 185). For the FD symbols (182, 183, 184), the direction of the cell-specific TDD configuration message (setting) is overwritten by the direction of the UE-specific TDD configuration message (setting). That is, the direction of the UE-specific TDD configuration message (setting) is applied.

[0351] Therefore, the directions finally applied to the plurality of symbols (181 to 185) are UUUFD in sequence.

[0352] Fig.19 The present invention illustrates a signaling method between a base station and a UE in a wireless communication system. Specifically, Fig.19 Demonstrates application Fig.17 The method is signaling and operation between the base station and the UE.

[0353] Reference Fig.19 The base station sends a full-duplex (FD) configuration message to the UE to notify a full-duplex (FD) symbol among a plurality of symbols (S191). For example, the FD configuration message may be provided through system information or a cell-specific RRC message.

[0354] The base station sends a cell-specific common TDD (Time Division Duplex) configuration message to the UE (S192). For example, the common TDD configuration message may be provided via system information or a cell-specific RRC message.

[0355] The base station sends a UE-specific dedicated TDD configuration message to the UE (S193). For example, the dedicated TDD configuration message may be provided via a UE-specific RRC message.

[0356] For only the full-duplex symbol among the plurality of symbols, the UE determines the direction (D, U, F) of the symbol by overwriting the first direction information indicated by the common TDD configuration message with the second direction information indicated by the dedicated TDD configuration message (S194).

[0357] From the perspective of the base station, this can be described as meaning that only for full-duplex symbols among the plurality of symbols for the UE, the second direction information indicated by the dedicated TDD configuration message is applied instead of the first direction information indicated by the common TDD configuration message.

[0358] The base station and the UE communicate based on the determined symbol direction (S195).

[0359] According to the method of the present disclosure, even in an environment where a conventional UE uses a TDD setting with almost no flexible resources, full-duplex operation can be supported for an enhanced UE capable of recognizing full-duplex. Therefore, resource utilization efficiency can be improved, and throughput can be improved.

[0360] Fig. 20 A wireless device applied to this specification is exemplified.

[0361] Reference Fig. 20 , the first wireless device 100 and the second wireless device 200 may transmit radio signals through various RATs (eg, LTE and NR).

[0362] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may also include one or more transceivers 106 and / or one or more antennas (antenna units) 108. The processor 102 may control the memory 104 and / or the transceiver 106, and is configured to implement the descriptions, functions, processes, proposals, methods and / or operation flows disclosed in this document. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and may then transmit a radio signal including the first information / signals through the transceiver 106. In addition, the processor 102 may receive a radio signal including second information / signals through the transceiver 106, and may then store information obtained from the signal processing of the second information / signals in the memory 104. The memory 104 may be connected to the processor 102, and may store various pieces of information related to the operation of the processor 102. For example, the memory 104 may store software codes including instructions for executing part or all of the processing controlled by the processor 102 or for executing the description, function, process, proposal, method and / or operation flow chart disclosed in this document. Here, the processor 102 and the memory 104 may be a part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and may send and / or receive radio signals via one or more antennas 108. The transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be replaced by a radio frequency (RF) unit. In this specification, a wireless device may represent a communication modem / circuit / chip. The processor 102 receives an FD configuration message notifying a full-duplex (FD) symbol among multiple symbols, receives a cell-specific public TDD configuration message, and receives a UE-specific dedicated TDD configuration message. Then, for only the full-duplex symbols among the plurality of symbols, the processor 102 covers the first direction information indicated by the common TDD configuration message with the second direction information indicated by the dedicated TDD configuration message.

[0363] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the descriptions, functions, processes, proposals, methods and / or operation flows disclosed in this document. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then may transmit a radio signal including the third information / signals through the transceiver 206. In addition, the processor 202 may receive a radio signal including fourth information / signals through the transceiver 206, and may store information obtained by processing the signal of the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202, and may store various information related to the operation of the processor 202. For example, the memory 204 may store software codes, which include instructions for executing part or all of the processing controlled by the processor 202 or for executing the description, function, process, proposal, method and / or operation flow chart disclosed in this document. Here, the processor 202 and the memory 204 may be a part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and may send and / or receive radio signals via one or more antennas 208. The transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be replaced by an RF unit. In this specification, a wireless device may represent a communication modem / circuit / chip. The processor 202 sends an FD configuration message indicating a full-duplex (FD) symbol among multiple symbols to the UE, sends a cell-specific public TDD configuration message to the UE, and sends a UE-specific dedicated TDD configuration message to the UE. For the UE, only for full-duplex symbols among the plurality of symbols, the processor 202 applies the second direction information provided by the dedicated TDD configuration message instead of the first direction information provided by the common TDD configuration message.

[0364] Hereinafter, the hardware elements of the wireless devices 100 and 200 will be described in more detail. 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) according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document, and may provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206, and may obtain a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operational flow charts disclosed in this document.

[0365] 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.

[0366] That is, at least one computer-readable medium (CRM) having instructions executed by at least one processor to perform operations, the operations including: receiving a full-duplex (FD) configuration message notifying a full-duplex symbol among a plurality of symbols, receiving a cell-specific public TDD configuration message, receiving a UE-specific dedicated TDD configuration message, and only for the full-duplex symbols among the plurality of symbols, overwriting the first direction information indicated by the public TDD configuration message with the second direction information indicated by the dedicated TDD configuration message.

[0367] The descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document may be implemented using firmware or software, and the 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 operational 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 operational flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, commands, and / or command sets.

[0368] 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 a read-only memory (ROM), a random access memory (RAM), an electrically erasable programmable read-only memory (EPROM), a flash memory, a hard drive, a register, a cache, a computer-readable storage medium, and / or a combination thereof. At least one memory 104 and 204 may be located inside and / or outside of one or more processors 102 and 202. In addition, 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.

[0369] One or more transceivers 106 and 206 can send the user data, control information and / or radio signal / channel mentioned in the method and / or operation flow chart disclosed in this document to one or more other devices. One or more transceivers 106 and 206 can receive the user data, control information and / or radio signal / channel mentioned in the description, function, process, proposal, method and / or operation flow chart 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 send and receive radio signals. For example, one or more processors 102 and 202 can perform control so that one or more transceivers 106 and 206 can send user data, control information or radio signal to one or more other devices. In addition, one or more processors 102 and 202 can perform control so that one or more transceivers 106 and 206 can receive user data, control information or radio signal from one or more other devices. In addition, 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 send or receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flow charts 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 into baseband signals so as to process received user data, control information, radio signals / channels, etc. using 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 using one or more processors 102 and 202 from baseband signals into RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0370] Fig.21 Here, the signal processing can be performed in Fig.18 is executed in processors 102 and 202.

[0371] Reference Fig.21 , a transmitting device in a UE or a BS (e.g., a processor, a processor and a memory, or a processor and a transceiver) 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.

[0372] The transmitting device may transmit one or more codewords. The coded bits in each codeword are scrambled by the corresponding scrambler 301 and transmitted on the physical channel. The codeword may be referred to as a data string and may be equivalent to a transport block which is a data block provided by the MAC layer.

[0373] The modulator 302 may modulate the scrambled bits into complex-valued modulation symbols. The modulator 302 may modulate the scrambled bits according to a modulation scheme to arrange complex-valued modulation symbols representing positions on a signal constellation diagram. The modulation scheme is not limited, and the coded data may be modulated using m-PSK (m-phase shift keying) or m-QAM (m-quadrature amplitude modulation). The modulator may be referred to as a modulation mapper.

[0374] The complex-valued modulation symbols may be mapped to one or more transmission layers by a layer mapper 303. The complex-valued modulation symbols on each layer may be mapped by an antenna port mapper 304 to be transmitted on an antenna port.

[0375] Each resource block mapper 305 can map the complex-valued modulation symbol for each antenna port to an appropriate resource element in a virtual resource block allocated for transmission. The resource block mapper can map the virtual resource block to a physical resource block according to an appropriate mapping scheme. The resource block mapper 305 can allocate the complex-valued modulation symbol for each antenna port to an appropriate subcarrier and multiplex the complex-valued modulation symbol according to the user.

[0376] Each signal generator 306 can modulate a complex-valued modulation symbol, i.e., an antenna-specific symbol, for each antenna port according to a specific modulation scheme (e.g., OFDM (Orthogonal Frequency Division Multiplexing)) to generate a complex-valued time-domain OFDM symbol signal. The signal generator can perform IFFT (Inverse Fast Fourier Transform) on the antenna-specific symbol, and can insert a CP (Cyclic Prefix) into the time-domain symbol on which IFFT has been performed. The OFDM symbol is subjected to digital-to-analog conversion and up-conversion, and then sent to the receiving device through each transmitting antenna. The signal generator may include an IFFT module, a CP insertion unit, a digital-to-analog converter (DAC), and an up-converter.

[0377] Fig. 22 Another example of the structure of the signal processing module in the transmitting device is illustrated. Here, the signal processing can be performed in the processor of the UE / BS, for example Fig. 20 Processors 102 and 202.

[0378] Reference Fig. 22 , a transmitting device (e.g., a processor, a processor and a memory, or a processor and a transceiver) in a UE or a 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.

[0379] The sending device may scramble the coded bits in the codeword through the corresponding scrambler 401, and then send the scrambled coded bits through the physical channel.

[0380] The scrambled bits are modulated into complex-valued modulation symbols by the modulator 402. The modulator may modulate the scrambled bits according to a predetermined modulation scheme to arrange complex-valued modulation symbols representing positions on a signal constellation diagram. The modulation scheme is not limited, and π / 2-BPSK (π / 2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), or m-QAM (m-Quadrature Amplitude Modulation) may be used to modulate the encoded data.

[0381] The complex-valued modulation symbols may be mapped to one or more transmission layers by a layer mapper 403 .

[0382] The complex-valued modulation symbols on each layer may be precoded by the precoder 404 so as to be transmitted on the antenna port. Here, the precoder may perform transform precoding on the complex-valued modulation symbols and then perform precoding. Alternatively, the precoder may perform precoding without transform precoding. The precoder 404 may process the complex-valued modulation symbols according to MIMO using multiple transmit antennas to output antenna-specific symbols and assign the antenna-specific symbols to the corresponding resource block mapper 405. The output z of the precoder 404 may be obtained by multiplying the output y of the layer mapper 403 by the N×M precoding matrix W. Here, N is the number of antenna ports and M is the number of layers.

[0383] Each resource block mapper 405 maps the complex-valued modulation symbols for each antenna port to appropriate resource elements in the virtual resource block allocated for transmission.

[0384] The resource block mapper 405 may allocate complex-valued modulation symbols to appropriate subcarriers and multiplex the complex-valued modulation symbols according to users.

[0385] Each signal generator 406 can modulate the complex-valued modulation symbol according to a specific modulation scheme (e.g., OFDM) to generate a complex-valued time-domain OFDM symbol signal. The signal generator 406 can perform IFFT (Inverse Fast Fourier Transform) on the antenna-specific symbol, and can insert a CP (Cyclic Prefix) into the time-domain symbol that has been subjected to IFFT. The OFDM symbol is subjected to digital-to-analog conversion and up-conversion, and then sent to the receiving device through each transmitting antenna. The signal generator 406 may include an IFFT module, a CP insertion unit, a digital-to-analog converter (DAC), and an up-converter.

[0386] The signal processing process of the receiving device may be the inverse process of the signal processing process 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 by the receiving antennas are restored to baseband signals, which are then multiplexed and demodulated according to MIMO to be restored to data strings intended to be sent by the transmitting device. The receiving device may include: a signal recovery unit that restores the received signal to a baseband signal; a multiplexer that is used to combine and multiplex the received signals; and a channel demodulator that is used to demodulate the multiplexed signal string into corresponding codewords. The signal recovery unit, the multiplexer, and the channel demodulator may be configured as an integrated module or an independent module 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 FFT (Fast Fourier Transform) to the signal from which the CP has been removed to output a frequency domain signal; and a resource element demapper / equalizer for restoring the frequency domain symbol to an antenna specific symbol. The antenna specific symbol is restored to a transmission layer by a multiplexer, and the transmission layer is restored to a codeword intended to be sent by a transmitting device by a channel demodulator.

[0387] Fig.23 An example of a wireless communication device according to an implementation example of the present disclosure is illustrated.

[0388] Reference Fig.23 , 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 a 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 subscriber identity module (SIM) card 2325, a speaker 2345, and a microphone 2350. Multiple antennas and multiple processors may be provided.

[0389] The processor 2310 may implement the functions, processes, and methods described in this specification. Fig.23 Processor 2310 Fig.23 The memory 2330 may be Fig. 20 Processors 102 and 202 in.

[0390] The memory 2330 is connected to the processor 2310 and stores information related to the operation of the processor. The memory can be located inside or outside the processor and connected to the processor through various technologies such as wired connection and wireless connection. Fig.23 The memory 2330 may be Fig. 20 The memories 104 and 204 in FIG.

[0391] The user can input various types of information such as a phone number using various techniques such as pressing a button of the keypad 2320 or starting a voice using the microphone 2350. The processor 2310 can receive and process the user information and perform appropriate functions such as making a call using the input phone number. In some scenarios, data can be obtained from the SIM card 2325 or the memory 2330 to perform appropriate functions. In some scenarios, the processor 2310 can display various types of information and data on the display 2315 for the convenience of the user.

[0392] The transceiver 2335 is connected to the processor 2310 and transmits and / or receives RF signals. The processor can control the transceiver to start 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 sending and receiving RF signals. Antenna 2340 can facilitate the transmission and reception of RF signals. In some implementation examples, when the transceiver receives an RF signal, the transceiver can forward the signal and convert it to a baseband frequency for processing performed by the processor. The signal can be processed by various techniques such as conversion into audible or readable information so as to be output through the speaker 2345. Fig.23 The transceiver in can be Fig.26 The transceivers 106 and 206 in FIG.

[0393] although Fig.23 Although not shown in the figure, 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.

[0394] Fig.23 is an example of implementation of the UE, and the implementation example of the present disclosure is not limited thereto. The UE does not necessarily have to include Fig.23 That is, some components, such as keyboard 2320, GPS chip 2360, sensor 2365, and SIM card 2325, may not be essential components. In this case, they may not be included in the UE.

[0395] Fig.24 An example of a processor 2000 is shown.

[0396] Reference Fig.24 , the processor 2000 may include a control channel transceiver 2010 and a data channel transceiver 2020. For example, the processor 2000 may execute from the perspective of the UE Figures 16 to 24The processor 2000 may be Fig. 20 Examples of processors 102 and 202.

[0397] Fig.25 An example of a processor 3000 is shown.

[0398] Reference Fig.25 , the processor 3000 may include a control information / data generating module 3010 and a sending / receiving module 3020. For example, the processor 3000 may execute from the perspective of a base station or a network. Figures 17 to 19 The processor 3000 may be Fig. 20 Examples of processors 102, 202.

[0399] Fig.26 Another example of a wireless device is shown.

[0400] Reference Fig.26 , 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 .

[0401] Fig.26 An example of a wireless device described in Fig. 20 The example of the wireless device described in is different in that Fig. 20 The processors 102 and 202 are separated from the memories 104 and 204, and Fig.26 In the example of FIG. 1 , the memories 104 and 204 are included in the processors 102 and 202. That is, the processor and the memory may constitute a chipset.

[0402] Fig. 27 Another example of a wireless device applied to the present specification is shown. The wireless device can be implemented in various forms according to use cases / services.

[0403] Reference Fig. 27 , the wireless devices 100 and 200 may correspond to Fig. 20 The wireless devices 100 and 200 of the present invention may be configured by 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 an additional component 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 Fig. 20The 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 the program / code / command / information stored in the memory unit 130. In addition, the control unit 120 may transmit the information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store the information received from the outside (e.g., other communication devices) via the communication unit 110 through the wireless / wired interface in the memory unit 130.

[0404] The additional component 140 may 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 a robot 100a in FIG. 34, but is not limited thereto. Vehicles 100b-1, 100b-2 in FIG. 34, XR devices 100c in FIG. 34, handheld devices 100d in FIG. 34, home appliances 100e in FIG. 34, IoT devices 100f in FIG. 34, digital broadcast UEs, hologram devices, public safety devices, MTC devices, medical devices, fintech devices (or financial devices), security devices, climate / environmental devices, AI servers / devices 400 in FIG. 34, BS200 in FIG. 34, network nodes, etc. The wireless device may be used in a mobile or fixed location depending on the usage example / service.

[0405] exist Fig. 27In the wireless devices 100 and 200, various elements, components, units / components and / or modules within the wireless devices 100 and 200 may be fully interconnected through a wired interface, or at least a portion may be wirelessly connected through the communication unit 110. For example, within the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be connected by wire, and the control unit 120 and the first unit (e.g., 130 and 140) may be connected through the communication unit 110. In addition, each element, component, unit / component and / or module within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be composed of one or more processor groups. For example, the control unit 120 may be composed of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, and a memory control processor. As another example, the memory unit 130 includes a random access memory (RAM), a dynamic RAM (DRAM), a read only memory (ROM), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0406] Fig.28 Examples of handheld devices to which the present specification is applicable are illustrated. Handheld devices may include smartphones, smart tablets, wearable devices (e.g., smart watches or smart glasses), or portable computers (e.g., notebooks). Handheld devices may be referred to as mobile stations (MS), user terminals (UTs), mobile subscriber stations (MSSs), subscriber stations (SSs), advanced mobile stations (AMSs), or wireless terminals (WTs).

[0407] Reference Fig.28 , the handheld device 100 may include an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and an I / O unit 140c. The antenna unit 108 may be configured as a part of the communication unit 110. Blocks 110 to 130 / 140a to 140c correspond to Fig. 27 Blocks 110 to 130 / 140.

[0408] The communication unit 110 may send and receive signals (e.g., data and control signals) to and from other wireless devices or BSs. The control unit 120 may perform various operations by controlling the constituent elements of the handheld device 100. The control unit 120 may include an application processor (AP). The memory unit 130 may store data / parameters / programs / codes / commands required to drive the handheld device 100. In addition, the memory unit 130 may store input / output data / information. The power supply unit 140a may supply power to the handheld device 100, including a wired / wireless charging circuit, a battery, etc. The interface unit 140b may support the connection of the handheld device 100 with other external devices. The interface unit 140b may include various ports (e.g., audio I / O ports and video I / O ports) for connecting to external devices. The I / O unit 140c may input or output video information / signals, audio information / signals, data and / or information input by a user. The I / O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker and / or a tactile module.

[0409] For example, in the case of data communication, the I / O unit 140c may acquire information / signals (e.g., touch, text, voice, image, or video) input by the user, and the acquired information / signals may be stored in the memory unit 130. The communication unit 110 may convert the information / signals stored in the memory into radio signals, and directly transmit the converted radio signals to other wireless devices or to a BS. In addition, the communication unit 110 may receive radio signals from other wireless devices or BSs, and then restore the received radio signals to the original information / signals. The restored information / signals may be stored in the memory unit 130, and may be output in various types (e.g., text, voice, image, video, or tactile) through the I / O unit 140c.

[0410] Fig.29 A communication system 1 applied to the present specification is shown.

[0411] Reference Fig.29, the communication system 1 applied to this specification includes a wireless device, a base station (BS) and a network. Herein, a wireless device refers to a device that communicates using a 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. The wireless device may include, but is not limited to, a robot 100a, a vehicle 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of communicating 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 a head-mounted device (HMD), a head-up display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, and the like. Handheld devices may include smart phones, smart tablets, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include televisions, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, the BS and the network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0412] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without passing through the BS / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). In addition, an IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0413] Wireless communication / connection 150a, 150b or 150c can be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Herein, wireless communication / connection can be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication) or inter-BS communication (e.g., relay, integrated access and backhaul (IAB)). The wireless device and the BS / wireless device can send / receive radio signals to each other through wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b can send / receive signals through various physical channels. To this end, various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping) and at least a portion of the resource allocation process can be performed based on various proposals of the present disclosure.

[0414] In addition, NR supports multiple parameter sets (or subcarrier spacing (SCS)) to support various 5G services. For example, if the SCS is 15kHz, wide areas in traditional cellular bands can be supported. If the SCS is 30kHz / 60kHz, dense cities, lower latency, and wider carrier bandwidths are supported. If the SCS is 60kHz or higher, bandwidths greater than 24.25GHz are used to overcome phase noise.

[0415] The NR frequency band may be defined as two types of frequency ranges (FR1, FR2). The value of the frequency range may be changed. For example, the two types of frequency ranges (FR1, FR2) may be as shown in Table 7 below. For ease of explanation, among the frequency ranges used in the NR system, FR1 may mean "lower than 6 GHz range", and FR2 may mean "higher than 6 GHz range" and may also be referred to as millimeter wave (mmW).

[0416] [Table 7]

[0417] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 450MHz to 6000MHz 15, 30, 60kHz FR2 24250MHz to 52600MHz 60, 120, 240kHz

[0418] As described above, the value of the frequency range in the NR system can be changed. For example, as shown in Table 8 below, FR1 may include a frequency band in the range of 410 MHz to 7125 MHz. That is, FR1 may include a frequency band of at least 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.). For example, the frequency band of at least 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.) included in FR1 may include an unlicensed frequency band. The unlicensed frequency band can be used for a variety of purposes, for example, an unlicensed frequency band for vehicle-specific communications (e.g., autonomous driving).

[0419] [Table 8]

[0420]

[0421]

[0422] The claims disclosed in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented or performed in a device, and the technical features in the device claims of this specification can be combined to be implemented or performed in a method. In addition, the technical features in the method claims and device claims of this specification can be combined to be implemented or performed in a device. In addition, the technical features in the method claims and device claims of this specification can be combined to be implemented or performed in a method.

Claims

1. A method for operating a user equipment UE in a wireless communication system, the method comprising the following steps: receiving a full-duplex FD configuration message notifying a full-duplex symbol among a plurality of symbols; Receiving a cell-specific common time division duplex TDD configuration message; as well as Receive UE-specific dedicated TDD configuration message, Only for the full-duplex symbol among the multiple symbols, the UE uses the second direction information notified by the dedicated TDD configuration message to cover the first direction information notified by the common TDD configuration message.

2. The method according to claim 1, wherein: Based on the dedicated TDD configuration message not configuring the full-duplex symbol as uplink or downlink, the full-duplex symbol is determined to be a flexible symbol.

3. The method according to claim 1, wherein: The first direction information notified by the common TDD configuration message is applied to symbols other than the full-duplex symbol among the plurality of symbols.

4. The method according to claim 1, wherein: Subband full-duplex (SBFD) is applied to the full-duplex symbol, in which frequency resources of a symbol include a first subband for downlink reception and a second subband for uplink transmission, and the first subband and the second subband do not overlap each other.

5. The method according to claim 4, wherein: The UE is a SBFD-aware UE capable of identifying the SBFD.

6. The method according to claim 5, wherein: The dedicated TDD configuration message is information additionally set to an existing dedicated TDD configuration message applied to an existing UE that cannot recognize the SBFD.

7. The method according to claim 1, wherein: A different dedicated TDD configuration message is applied for each period of the common TDD configuration message.

8. The method according to claim 7, wherein: The first dedicated TDD configuration message is applied to a first period of the common TDD configuration message, and the second dedicated TDD configuration message is applied to a second period of the common TDD configuration message.

9. The method according to claim 1, wherein: The full-duplex symbol is included in symbols that are not configured as uplink by the common TDD configuration message among the plurality of symbols.

10. The method according to claim 1, wherein: The full-duplex symbol applies the direction notified by the second direction information, rather than the direction notified by the first direction information.

11. The method according to claim 10, wherein: The direction notified by the first direction information is downlink or uplink, and the direction notified by the second direction information is downlink or uplink.

12. The method according to claim 1, wherein: Among the plurality of symbols, symbols other than the full-duplex symbol are half-duplex HD symbols, and frequency resources of the HD symbols include downlink resources for downlink reception or uplink resources for uplink transmission.

13. A user equipment UE, the UE comprising: Transceiver; at least one memory; as well as at least one processor operatively coupled to the at least one memory and the transceiver, wherein the processor is adapted to: receiving a full-duplex FD configuration message notifying a full-duplex symbol among a plurality of symbols, receiving a cell-specific common time division duplex (TDD) configuration message, and Receive UE-specific dedicated TDD configuration message, Only for the full-duplex symbol among the multiple symbols, the UE uses the second direction information notified by the dedicated TDD configuration message to cover the first direction information notified by the common TDD configuration message.

14. A device of a user equipment UE, the device comprising: at least one memory; as well as at least one processor operatively coupled to the at least one memory, Wherein, the processor is suitable for: receiving a full-duplex FD configuration message notifying a full-duplex symbol among a plurality of symbols, receiving a cell-specific common time division duplex (TDD) configuration message, and Receive UE-specific dedicated TDD configuration message, Only for the full-duplex symbol among the multiple symbols, the at least one processor covers the first direction information notified by the common TDD configuration message with the second direction information notified by the dedicated TDD configuration message.

15. At least one computer readable medium (CRM) having instructions to be executed by at least one processor to perform operations comprising: receiving a full-duplex FD configuration message notifying a full-duplex symbol among a plurality of symbols, receiving a cell-specific common time division duplex (TDD) configuration message, and Receive UE-specific dedicated TDD configuration message, Only for the full-duplex symbols among the multiple symbols, the at least one processor covers the first direction information notified by the common TDD configuration message with the second direction information notified by the dedicated TDD configuration message.

16. A method for operating a base station in a wireless communication system, the method comprising the steps of: Sending a full-duplex FD configuration message to the user equipment UE to notify the full-duplex symbol among the multiple symbols, sending a cell-specific common TDD configuration message to the UE, and sending a UE-specific dedicated TDD configuration message to the UE, Wherein, for the UE, only for the full-duplex symbol among the multiple symbols, the second direction information notified by the dedicated TDD configuration message is applied instead of the first direction information notified by the common TDD configuration message.

17. A base station BS, comprising: Transceiver; at least one memory; as well as at least one processor operatively coupled to the at least one memory and the transceiver, wherein the processor is adapted to: Sending a full-duplex FD configuration message to the user equipment UE to notify the full-duplex symbol among the multiple symbols, sending a cell-specific common TDD configuration message to the UE, and sending a UE-specific dedicated TDD configuration message to the UE, Wherein, for the UE, only for the full-duplex symbol among the multiple symbols, the second direction information notified by the dedicated TDD configuration message is applied instead of the first direction information notified by the common TDD configuration message.

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