Method and device for enhancing coverage area in full-duplex communication system

Abstract

The invention discloses a coverage enhancement method and device in a full-duplex communication system. A method of a terminal comprises the steps of: receiving information indicating to perform UL transmission from a base station; and performing UL transmission in a resource region including an SBFD symbol in which at least one of DL communication or UL communication may be performed and a non-SBFD symbol in which only one of DL communication or UL communication may be performed.

Description

Technical Field

[0001] The present disclosure relates to a communication technology, and more particularly, to a coverage enhancement technology in a full-duplex communication system. Background Art

[0002] With the development of information and communication technology, various wireless communication technologies have been developed. Typical wireless communication technologies include Long Term Evolution (LTE) and New Radio (NR), which are defined in the Third Generation Partnership Project (3GPP) standard. LTE can be one of the fourth generation (4G) wireless communication technologies, and NR can be one of the fifth generation (5G) wireless communication technologies.

[0003] After the commercialization of 4G communication systems (e.g., communication systems supporting LTE), 5G communication systems (e.g., communication systems supporting NR) using a higher frequency band (e.g., a frequency band of 6 GHz or more) than the frequency band of the 4G communication system (e.g., a frequency band of 6 GHz or less) are being considered to handle the surge in wireless data. The 5G communication system can support enhanced mobile broadband (eMBB), ultra-reliable low latency communication (URLLC), massive machine type communication (mMTC), etc. Discussions on the sixth generation (6G) communication system after the 5G communication system are underway.

[0004] Meanwhile, when the terminal is located at the edge of the base station coverage, the communication quality between the terminal and the base station may deteriorate. In this case, the terminal may not be able to communicate with the base station. Some methods are needed to solve the above problems. Summary of the invention

[0005]

Technical issues

[0006] The present disclosure is directed to providing a method and apparatus for coverage enhancement in a full-duplex communication system.

[0007]

Technical solution

[0008] According to an exemplary embodiment of the present disclosure for achieving the above-mentioned purpose, a method of a terminal may include: receiving information indicating the performance of uplink (UL) transmission from a base station; and performing UL transmission in a resource region including sub-band full-duplex (SBFD) symbols and non-SBFD symbols, wherein at least one of downlink (DL) communication or UL communication can be performed in the SBFD symbols, and only one of DL communication or UL communication can be performed in the non-SBFD symbols.

[0009] When performing UL transmission, the terminal may recognize that an event in which coherence of UL transmission is not maintained occurs in the resource region.

[0010] The terminal may maintain the coherence of UL transmission in a time domain window (TDW) before the event according to the instruction from the base station.

[0011] When an event in which the coherence of UL transmission is not maintained occurs in the resource region, the terminal may maintain the coherence of UL transmission in a TDW after the event.

[0012] The TDW may be configured based on at least one of the capabilities of the terminal or an indication from the base station.

[0013] The terminal can maintain power consistency and phase continuity of communication in SBFD symbols and non-SBFD symbols.

[0014] The information indicating that UL transmission is performed may indicate a physical uplink shared channel (PUSCH) repetition type A or a PUSCH repetition type B.

[0015] When UL transmission is performed based on PUSCH repetition type A, a time slot in which UL transmission is dropped may not be considered as an available time slot.

[0016] When UL transmission is performed based on PUSCH repetition type B, a partition instance may be generated at a boundary between a SBFD symbol and a non-SBFD symbol.

[0017] One or more symbols before the boundary between the SBFD symbol and the non-SBFD symbol or one or more symbols after the boundary may be configured as one or more gap symbols.

[0018] The UL transmission may be a sounding reference signal (SRS) transmission, and the validity of SRS resources for performing SRS transmission may be determined on a symbol, symbol subset, or port subset basis at a boundary between a SBFD symbol and a non-SBFD symbol.

[0019] The UL transmission may be SRS transmission, and the validity of SRS resources for performing SRS transmission may be determined in units of SRS resources.

[0020] According to an exemplary embodiment of the present disclosure for achieving the above-mentioned purpose, a terminal may include at least one processor, and the at least one processor may enable the terminal to execute: receiving information indicating the execution of uplink (UL) transmission from a base station; and performing UL transmission in a resource region including sub-band full-duplex (SBFD) symbols and non-SBFD symbols, wherein at least one of downlink (DL) communication or UL communication can be performed in the SBFD symbols, and only one of DL communication or UL communication can be performed in the non-SBFD symbols.

[0021] When performing UL transmission, the terminal may recognize that an event in which coherence of UL transmission is not maintained occurs in the resource region.

[0022] When an event in which coherence of UL transmission is not maintained occurs in a resource region, the terminal may maintain coherence of UL transmission in a time domain window (TDW) after the event.

[0023] The TDW may be configured based on at least one of the capabilities of the terminal or an indication from the base station.

[0024] When UL transmission is performed based on a physical uplink shared channel (PUSCH) repetition type A, a time slot in which UL transmission is dropped may not be considered as an available time slot.

[0025] When UL transmission is performed based on PUSCH repetition type B, a partitioning instance may be generated at a boundary between a SBFD symbol and a non-SBFD symbol.

[0026] One or more symbols before the boundary between the SBFD symbol and the non-SBFD symbol or one or more symbols after the boundary may be configured as one or more gap symbols.

[0027] The UL transmission may be a sounding reference signal (SRS) transmission, and the validity of SRS resources for performing SRS transmission may be determined on a symbol, symbol subset, or port subset basis at a boundary between a SBFD symbol and a non-SBFD symbol.

[0028]

Technical Effect

[0029] According to the present disclosure, a terminal may repeatedly transmit an uplink (UL) signal / channel. A repeated transmission operation of the UL signal / channel may be performed in a resource region including SBFD symbols and non-SBFD symbols. When performing the repeated transmission operation of the UL signal / channel, power consistency / phase continuity may be maintained. Therefore, the communication coverage may be improved and the performance of the communication system may be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a conceptual diagram illustrating a first exemplary embodiment of a communication system.

[0031] Figure 2 is a block diagram showing a first exemplary embodiment of a communication node constituting a communication system.

[0032] Figure 3 is a conceptual diagram illustrating a first exemplary embodiment of a subband filter mask for a DL subband and a UL subband in an SD symbol.

[0033] Figure 4 is a conceptual diagram illustrating a first exemplary embodiment of a slot mode (eg, TDD slot mode) including SD symbols.

[0034] Figure 5 is a conceptual diagram illustrating a first exemplary embodiment of UL transmission in resources including SD symbols and non-SD symbols.

[0035] Figure 6 is a conceptual diagram illustrating a second exemplary embodiment of UL transmission in resources including SD symbols and non-SD symbols.

[0036] Figure 7 is a conceptual diagram showing a first exemplary embodiment of UL signal / channel transmission based on frequency hopping.

[0037] Figure 8 is a conceptual diagram illustrating a first exemplary embodiment of an SSS monitoring operation.

[0038] Fig. 9 is a conceptual diagram illustrating a second exemplary embodiment of an SSS monitoring operation.

[0039] Fig.10 is a conceptual diagram illustrating a third exemplary embodiment of an SSS monitoring operation.

[0040] Fig.11 is a conceptual diagram showing a first exemplary embodiment of an SRS resource having two ports.

[0041] Fig.12 is a conceptual diagram showing a first exemplary embodiment of an SRS resource having four ports.

[0042] Fig.13 is a conceptual diagram showing a first exemplary embodiment of an SRS resource having eight ports.

[0043] Fig.14 is a conceptual diagram showing a second exemplary embodiment of an SRS resource having eight ports.

[0044] Fig.15 is a conceptual diagram illustrating a first exemplary embodiment of a TRS symbol. DETAILED DESCRIPTION

[0045] Since the present disclosure can be modified in various ways and has multiple forms, specific exemplary embodiments will be shown in the drawings and described in detail in the detailed description. However, it should be understood that this is not intended to limit the present disclosure to specific exemplary embodiments, but on the contrary, the present disclosure is intended to cover all modifications and alternatives that fall within the spirit and scope of the present disclosure.

[0046] Relational terms such as first, second, etc. may be used to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the present disclosure, a first component may be named a second component, and a second component may be similarly named a first component. The term "and / or" means any one or combination of a plurality of related and described items.

[0047] In exemplary embodiments of the present disclosure, “at least one of A and B” may refer to “at least one of A or B” or “at least one of a combination of one or more of A and B”. Furthermore, “one or more of A and B” may refer to “one or more of A or B” or “one or more of a combination of one or more of A and B”.

[0048] When it is mentioned that a certain component is “coupled” or “connected” to another component, it should be understood that the component is directly “coupled” or “connected” to the other component, or other components may be provided therebetween. On the contrary, when it is mentioned that a certain component is “directly coupled” or “directly connected” to another component, it should be understood that no other components are provided therebetween.

[0049] The terms used in this disclosure are only used to describe specific exemplary embodiments and are not intended to limit the present disclosure. Unless the context clearly dictates otherwise, singular expressions include plural expressions. In this disclosure, terms such as "including" or "having" are intended to indicate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but it should be understood that these terms do not exclude the presence or addition of one or more features, numbers, steps, operations, components, parts, or combinations thereof.

[0050] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those of ordinary skill in the art to which the present disclosure belongs. Terms commonly used and already appearing in dictionaries should be interpreted as having meanings that match the contextual meanings in the art. In this specification, unless explicitly defined, terms are not necessarily interpreted as having formal meanings.

[0051] Hereinafter, the form of the present disclosure will be described in detail with reference to the accompanying drawings. In describing the present disclosure, in order to facilitate the overall understanding of the present disclosure, the same numerals refer to the same elements throughout the description of the accompanying drawings, and their repeated description will be omitted.

[0052] A communication system to which an exemplary embodiment according to the present disclosure is applied will be described. The communication system to which an exemplary embodiment according to the present disclosure is applied is not limited to the content described below, and can be applied to various communication systems according to the exemplary embodiment of the present disclosure. Here, the communication system can be used in the same sense as the communication network.

[0053] In an exemplary embodiment, "configuration of an operation (e.g., transmission of an operation)" may mean "signaling of configuration information (e.g., information element, parameter) for an operation" and / or "signaling of information indicating execution of an operation". "Configuration of an information element (e.g., parameter)" may mean that the corresponding information element is transmitted by a signal. The signaling may be at least one of system information (SI) signaling (e.g., transmission of a system information block (SIB) and / or a master information block (MIB)), RRC signaling (e.g., transmission of RRC messages, RRC parameters and / or higher layer parameters), MAC control element (CE) signaling (e.g., transmission of a MAC message and / or MAC CE), PHY signaling (e.g., transmission of downlink control information (DCI), uplink control information (UCI) and / or sidelink control information (SCI)), or a combination thereof.

[0054] Figure 1 is a conceptual diagram illustrating a first exemplary embodiment of a communication system.

[0055] Reference Figure 1 , the communication system 100 may include a plurality of communication nodes 110-1, 110-2, 110-3, 120-1, 120-2, 130-1, 130-2, 130-3, 130-4, 130-5 and 130-6. In addition, the communication system 100 may also include a core network (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW) and a mobility management entity (MME)). When the communication system 100 is a 5G communication system (e.g., an NR system), the core network may include an access and mobility management function (AMF), a user plane function (UPF), a session management function (SMF), etc.

[0056] The plurality of communication nodes 110 to 130 may support communication protocols defined by technical specifications of the 3rd Generation Partnership Project (3GPP) (eg, LTE communication protocol, LTE-A communication protocol, NR communication protocol, etc.). The plurality of communication nodes 110 to 130 may support a communication protocol based on code division multiple access (CDMA), a communication protocol based on wideband CDMA (WCDMA), a communication protocol based on time division multiple access (TDMA), a communication protocol based on frequency division multiple access (FDMA), a communication protocol based on orthogonal frequency division multiplexing (OFDM), a communication protocol based on filtered OFDM, a communication protocol based on cyclic prefix OFDM (CP-OFDM), a communication protocol based on discrete Fourier transform spread OFDM (DFT-s-OFDM), a communication protocol based on orthogonal frequency division multiple access (OFDMA), a communication protocol based on single carrier FDMA (SC-FDMA), a communication protocol based on non-orthogonal multiple access (NOMA), a communication protocol based on generalized frequency division multiplexing (GFDM), a communication protocol based on filter bank multi-carrier (FBMC), a communication protocol based on universal filter multi-carrier (UFMC), a communication protocol based on space division multiple access (SDMA), etc. Each of the plurality of communication nodes may have the following structure.

[0057] Figure 2 is a block diagram showing a first exemplary embodiment of a communication node constituting a communication system.

[0058] Reference Figure 2 , the communication node 200 may include at least one processor 210, a memory 220, and a transceiver 230 connected to a network to perform communication. In addition, the communication node 200 may also include an input interface device 240, an output interface device 250, a storage device 260, etc. The various components included in the communication node 200 can be connected through a bus 270 to communicate with each other.

[0059] However, each component included in the communication node 200 may be connected to the processor 210 via a separate interface or a separate bus instead of the common bus 270. For example, the processor 210 may be connected to at least one of the memory 220, the transceiver 230, the input interface device 240, the output interface device 250, and the storage device 260 via a dedicated interface.

[0060] The processor 210 may execute a program stored in at least one of the memory 220 and the storage device 260. The processor 210 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor, on which the method according to the embodiment of the present disclosure is executed. Each of the memory 220 and the storage device 260 may be composed of at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory 220 may include at least one of a read-only memory (ROM) and a random access memory (RAM).

[0061] Refer again Figure 1 , the communication system 100 may include a plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2, and a plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6. Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 may form a macro cell, and each of the fourth base station 120-1 and the fifth base station 120-2 may form a small cell. The fourth base station 120-1, the third terminal 130-3, and the fourth terminal 130-4 may belong to the cell coverage of the first base station 110-1. In addition, the second terminal 130-2, the fourth terminal 130-4, and the fifth terminal 130-5 may belong to the cell coverage of the second base station 110-2. In addition, the fifth base station 120-2, the fourth terminal 130-4, the fifth terminal 130-5 and the sixth terminal 130-6 may belong to the cell coverage of the third base station 110-3. In addition, the first terminal 130-1 may belong to the cell coverage of the fourth base station 120-1, and the sixth terminal 130-6 may belong to the cell coverage of the fifth base station 120-2.

[0062] Here, each of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 may refer to a Node-B, an evolved Node-B (eNB), a gNB, an advanced base station (ABS), a high reliability base station (HR-BS), a base transceiver station (BTS), a radio base station, a radio transceiver, an access point, an access node, a radio access station (RAS), a mobile multi-hop relay base station (MMR-BS), a relay station (RS), an advanced relay station (ARS), a high reliability relay station (HR-RS), a home NodeB (HNB), a home eNodeB (HeNB), a road side unit (RSU), a radio remote head (RRH), a transmission point (TP), a transmission and reception point (TRP), etc.

[0063] Each of the multiple terminals 130-1, 130-2, 130-3, 130-4, 130-5 and 130-6 can refer to a user equipment (UE), a terminal equipment (TE), an advanced mobile station (AMS), a high reliability mobile station (HR-MS), a terminal, an access terminal, a mobile terminal, a station, a subscriber station, a mobile station, a portable subscriber station, a node, a device, an on-board unit (OBU), etc.

[0064] In addition, each of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can operate in the same frequency band or in different frequency bands. The multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can be connected to each other via an ideal backhaul or a non-ideal backhaul, and exchange information with each other via an ideal backhaul or a non-ideal backhaul. In addition, each of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can be connected to the core network via an ideal backhaul or a non-ideal backhaul. Each of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can transmit the signal received from the core network to the corresponding terminal 130-1, 130-2, 130-3, 130-4, 130-5 or 130-6, and transmit the signal received from the corresponding terminal 130-1, 130-2, 130-3, 130-4, 130-5 or 130-6 to the core network.

[0065] In addition, each of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can support multiple-input multiple-output (MIMO) transmission (for example, single-user MIMO (SU-MIMO), multi-user MIMO (MU-MIMO), massive MIMO, etc.), coordinated multi-point (CoMP) transmission, carrier aggregation (CA) transmission, unlicensed band transmission, device-to-device (D2D) communication (or proximity service (ProSe)), Internet of Things (IoT) communication, dual connectivity (DC), etc. Here, each of the plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6 may perform operations corresponding to the operations of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 (i.e., operations supported by the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2), for example, the second base station 110-2 may transmit a signal to the fourth terminal 130-4 in SU-MIMO mode, and the fourth terminal 130-4 may receive a signal from the second base station 110-2 in SU-MIMO mode. Alternatively, the second base station 110-2 may transmit a signal to the fourth terminal 130-4 and the fifth terminal 130-5 in MU-MIMO mode, and the fourth terminal 130-4 and the fifth terminal 130-5 may receive a signal from the second base station 110-2 in MU-MIMO mode.

[0066] The first base station 110-1, the second base station 110-2 and the third base station 110-3 can transmit signals to the fourth terminal 130-4 in a CoMP transmission manner, and the fourth terminal 130-4 can receive signals from the first base station 110-1, the second base station 110-2 and the third base station 110-3 in a CoMP manner. In addition, each of the multiple base stations 110-1, 110-2, 110-3, 120-1 and 120-2 can exchange signals with the corresponding terminal 130-1, 130-2, 130-3, 130-4, 130-5 or 130-6 belonging to its cell coverage in a CA manner. Each of base stations 110-1, 110-2, and 110-3 may control D2D communication between the fourth terminal 130-4 and the fifth terminal 130-5, and thus the fourth terminal 130-4 and the fifth terminal 130-5 may perform D2D communication under the control of the second base station 110-2 and the third base station 110-3.

[0067] The following will describe the operation method of the communication node in the communication system. Even if a method (e.g., transmission or reception of a data packet) performed at a first communication node in the communication node is described, the corresponding second communication node may also perform a method (e.g., reception or transmission of a data packet) corresponding to the method performed at the first communication node. That is, when describing the operation of a terminal, the corresponding base station may perform an operation corresponding to the operation of the terminal. Conversely, when describing the operation of a base station, the corresponding terminal may perform an operation corresponding to the operation of the base station.

[0068] Chapter 1 Introduction

[0069] The applied communication scenarios may be enhanced mobile broadband (eMBB) scenarios, massive machine type communication (mMTC) scenarios, ultra-reliable and low latency communication (URLLC) scenarios and / or time-sensitive communication (TSC) scenarios. mMTC scenarios, URLLC scenarios and / or TSC scenarios may be applied to Internet of Things (IoT) communications. A communication network (e.g., a communication system) may support all or some of the above scenarios. In a communication network supporting mMTC scenarios, narrowband (NB)-IoT and LTE-MTC technologies may be used to meet IMT-2020 requirements. In a communication system supporting URLLC scenarios, a lot of discussion may be required to meet the requirements.

[0070] In order to reduce the error rate of the data, a low modulation and coding scheme (MCS) level (or a low MCS index) can be applied. In order not to increase the size of the field indicated by the downlink control information (DCI), a frequently used MCS can be selected. In order to apply a lower MCS, repeated transmission operations can be supported. In the case of applying quadrature phase shift keying (QPSK) at the lowest modulation rate, the effect of further reducing the code rate can be produced. In particular, since the transmission power in the uplink (UL) transmission is limited, the repeated transmission operation can be performed in the time domain rather than the frequency domain.

[0071] In the case of eMBB traffic and URLLC traffic, a lower MCS can be used for different purposes respectively. For example, for eMBB traffic, a lower MCS may be required to extend coverage. On the other hand, for URLLC traffic, a lower MCS may be required to reduce latency and achieve lower error rates. Due to different requirements, eMBB traffic may be transmitted repeatedly even if relatively large delays occur. URLLC traffic can be transmitted using a new MCS (e.g., a low MCS) instead of repeated transmissions. The new MCS can be configured via RRC messages and / or DCI.

[0072] In order to support repeated transmission of eMBB traffic in the time domain, physical uplink shared channel (PUSCH) repetition (e.g., PUSCH repetition type A) may be introduced. In the present disclosure, PUSCH repetition may mean a PUSCH instance. In other words, depending on the context, PUSCH repetition may be interpreted as having the same meaning as a PUSCH instance. Repeated transmission of PUSCH may be performed in units of PUSCH instances. When repeated transmission of PUSCH is performed, PUSCH allocated based on time slots may be repeatedly transmitted. In order to expand coverage, time resources may be allocated over multiple time slots. When PUSCH repetition type A is used, time resources may be configured by RRC messages and / or DCI. The number of repetitions of PUSCH may be indicated by an RRC message, and the time resources for transmitting PUSCH in the first time slot may be indicated by DCI (e.g., in the case of type 2 configuration grant (CG) or dynamic grant) or RRC message (e.g., in the case of type 1 CG). In the present disclosure, the number of repetitions may mean the number of repeated transmissions or the number of transmissions.

[0073] In order to support URLLC traffic, the terminal may preferably perform frequent reception operations in downlink (DL) resources and / or perform frequent transmission operations in uplink (UL) resources. In a time division duplex (TDD) system, the terminal may operate based on a half-duplex scheme. Therefore, the time to support DL traffic and / or UL traffic may increase according to the time slot mode. On the other hand, in a frequency division duplex (FDD) system, the terminal may use DL resources and UL resources at the same time. Therefore, the above-mentioned problems in the TDD system may not occur in the FDD system. The FDD system can use two or more carriers. When two or more serving cells are configured for the terminal in the TDD system, the terminal can use DL resources and UL resources.

[0074] In a communication system including at least one carrier to which FDD is applied (hereinafter referred to as an "FDD carrier"), there may be no problems associated with the delay of the terminal. In a communication system including only a carrier to which TDD is applied (hereinafter referred to as a "TDD carrier"), there may be problems associated with the delay of the terminal. In order to solve the above problems, the time slots in the TDD carrier can be configured according to different modes.

[0075] The transmission of eMBB traffic and / or URLLC traffic may be supported in at least one of the licensed band or the unlicensed band. The carrier belonging to the licensed band may be used alone. The carrier belonging to the unlicensed band may be used alone. Alternatively, according to the configuration of the base station, the carrier belonging to the licensed band and the carrier belonging to the unlicensed band may be used together based on the carrier aggregation scheme.

[0076] In the present disclosure, transmission of a channel may mean transmitting a message, data, signal and / or information on the channel, and reception of a channel may mean transmitting a message, data, signal and / or information on the channel. A channel may be a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a physical random access channel (PRACH), a physical sidelink broadcast channel (PSBCH), a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH) and / or a physical sidelink feedback channel (PSFCH).

[0077] Chapter 2 Methods for performing full-duplex communication in sub-bands

[0078] In a communication system supporting time division duplex (TDD), downlink (DL) communication and uplink (UL) communication can be performed in different time resources. The ratio between the DL time for performing DL communication and the UL time for performing UL communication can be determined according to the ratio of traffic (e.g., DL traffic and / or UL traffic). For example, in an NR system, the amount of DL traffic is greater than the amount of UL traffic, so the DL time slot can be allocated more than the UL time slot. For example, the time slot (e.g., time slot mode) can be configured so that the mode "DDDSU" is repeated. Here, D may refer to a DL time slot, S may refer to a time slot including a DL symbol, a flexible (FL) symbol, and a UL symbol, and U may refer to a UL time slot. The arrangement order of symbols in the S time slot may be DL symbol-FL symbol-DL symbol. The base station may indicate or configure the time slot mode to the terminal through signaling (e.g., RRC signaling). The base station may indicate some of the FL symbols configured by RRC signaling as DL symbols or UL symbols. Some FL symbols may be indicated as DL symbols or UL symbols by DCI.

[0079] A terminal located at the edge of a cell may repeatedly transmit an UL signal / channel to transmit UL traffic to a base station. In this case, at the base station, the signal to interference plus noise ratio (SINR) may be improved and the block error rate (BLER) may be reduced. In the present disclosure, an UL signal / channel may refer to an UL signal and / or an UL channel, and a DL signal / channel may refer to a DL signal and / or a DL channel. The base station may instruct the terminal to repeatedly transmit an UL signal / channel, and the terminal may repeatedly transmit the UL signal / channel based on an instruction from the base station. The base station may instruct the terminal to repeatedly receive a DL signal / channel, and the terminal may repeatedly receive a DL signal / channel based on an instruction from the base station. If the UL time slot does not occur frequently, the terminal may experience a large delay to obtain enough UL time slots for repeated transmission. For example, when the mode "DDDSU" is configured and the subcarrier spacing (SCS) is 30kHz, the UL time slot may appear every 2.5ms. In this case, the time required for the UL signal / channel to be repeated four times may be 10ms.

[0080] In order to reduce this time delay, a method for improving the frequency shape of the time slot can be considered. The base station can perform full-duplex communication. The frequency region of the DL symbol (or FL symbol) of the DL time slot (or DL ​​time slot and S time slot) can be divided into sub-bands. The base station can perform a transmission operation of a DL signal / channel or a reception operation of a UL signal / channel in some sub-bands (e.g., DL symbols or FL symbols) of the DL time slot. Although the terminal performs half-duplex communication, the terminal can perform a transmission operation of a UL signal / channel in a DL time slot (e.g., DL symbols or FL symbols). Symbols capable of DL communication and UL communication may be referred to as sub-band full-duplex (SBFD) symbols or SD symbols. In the present disclosure, SD symbols may refer to SBFD symbols. The base station may configure SD symbols and / or non-SD symbols to the terminal through signaling. The terminal may receive configuration information of SD symbols and / or non-SD symbols from the base station. DL communication or UL communication may be performed in non-SD symbols.

[0081] Since DL communication and UL communication are performed in one SD symbol (e.g., the same time resource), a guard band can be introduced. The bandwidth of the guard band can vary depending on the amount of interference at the base station. When different antenna arrays are used, the coupling between DL communication and UL communication can be reduced. If there is little coupling between DL communication and UL communication, the guard band may be unnecessary, or the bandwidth required for the guard band is small. In this case, the guard band may not be allocated separately. Alternatively, a small amount of PRBs may be allocated for the guard band.

[0082] When there is little coupling between DL communication and UL communication, a separate Rx filtering operation or Rx processing operation may be performed at the base station, but a separate Tx filtering operation or Tx processing operation may not be required at the terminal. The filtering operation may be a radio frequency (RF) filtering operation. When the RF filtering operation is performed, spectrum emission to adjacent PRBs (e.g., out-of-band emission (OOB) or adjacent channel leakage ratio (ACLR)) may be reduced, and RF element saturation may be prevented.

[0083] The DL subband and the UL subband may have different frequencies. When leakage occurs, the analog-to-digital converter (ADC) may become saturated and small signals may be ignored. Therefore, the base station may appropriately arrange shielding between the antenna arrays or apply signal processing methods. In this case, the base station may allocate a smaller bandwidth to the guard band.

[0084] Figure 3 is a conceptual diagram illustrating a first exemplary embodiment of a subband filter mask for a DL subband and a UL subband in an SD symbol.

[0085] Reference Figure 3 , shows the power spectral density or spectrum mask of DL related filtering and / or UL related filtering. DL related filtering can be performed at the base station, and UL related filtering can be performed at the terminal. The UL subband can be located at the center of the carrier, and there can be two DL subbands. The DL band can be divided into two DL subbands by the UL subband. For another example, there can be two or more UL subbands, and the DL subband can exist in the remaining band.

[0086] The base station may not perform DL-related filtering by additionally considering the positions of the DL subband and / or the UL subband. The terminal may perform UL-related filtering by considering the position of the UL subband.

[0087] In order to add (e.g., transmit) UL signals / channels while minimizing the number of UL time slots in the time slot pattern, SD symbols may be introduced. The base station may indicate or configure the repeated transmission of UL signals / channels to a terminal located at the edge of a cell. The terminal may identify the need for repeated transmission of UL signals / channels based on the indication or configuration by the base station. The scheduling information for allocating PUSCH / PUCCH may include a repetition factor for time resources. The terminal may identify the repetition factor included in the scheduling information. The repetition factor may indicate that PUSCH / PUCCH is repeatedly transmitted n times. n may be a natural number. One repetition may refer to one transmission of PUSCH / PUCCH. If the repetition factor is not indicated to the terminal (e.g., if the scheduling information does not include the repetition factor), the terminal may transmit PUSCH / PUCCH once. In the present disclosure, PUSCH / PUCCH may refer to PUSCH and / or PUCCH. The scheduling information may include resource allocation information, resource activation information, and / or resource deactivation information. The scheduling information may be included in an RRC message, a MAC message (eg, MAC CE), and / or a PHY message (eg, DCI).

[0088] In order to extend the arrival distance of the UL signal / channel, the base station may instruct the terminal to perform demodulation-reference signal (DM-RS) bundling through signaling (e.g., RRC signaling). The terminal may identify the need for DM-RS bundling based on the signaling from the base station. Performing DM-RS bundling may mean maintaining power consistency / phase continuity in repeated PUSCH / PUCCH transmissions. The base station may perform a channel estimation operation at one time while maintaining power consistency / phase continuity. Therefore, the reception performance of PUSCH / PUCCH at the base station may be improved. Power consistency / phase continuity may refer to power consistency and / or phase continuity. Power consistency / phase continuity may refer to coherence (e.g., time coherence).

[0089] The base station may allocate SD symbols. The arrangement order of symbols in the time slot may be DL symbol-SD symbol-UL symbol. The FL symbol may be located between the DL symbol and the SD symbol. Alternatively, the FL symbol between the DL symbol and the SD symbol may be omitted. The FL symbol may be located between the SD symbol and the UL symbol. Alternatively, the FL symbol between the SD symbol and the UL symbol may be omitted.

[0090] Figure 4 is a conceptual diagram illustrating a first exemplary embodiment of a slot mode (eg, TDD slot mode) including SD symbols.

[0091] Reference Figure 4 , SD symbols may be located after DL symbols, and UL symbols may be located after SD symbols. The frequency band of SD symbols may be divided into DL subbands and UL subbands.

[0092] The UL bandwidth for SD symbols may be different from the UL bandwidth for UL symbols. Therefore, the base station may apply different filtering operations to SD symbols and UL symbols. If necessary, the terminal may apply different filtering operations to SD symbols and UL symbols (or DL ​​symbols). The application of different filtering operations may mean applying different filtering operations before and after the boundary between the SD symbol and the UL symbol. In this case, power consistency / phase continuity may not be maintained in the transmission / reception procedure of the UL signal / channel.

[0093] 2.1 DM-RS Bundling for UL Joint Channel Estimation

[0094] The base station may instruct the terminal to perform DM-RS bundling through signaling (e.g., RRC signaling). The terminal may perform DM-RS bundling according to an instruction from the base station. In this case, power consistency / phase continuity (e.g., coherence) may be maintained when performing repeated transmission of PUCCH / PUSCH. The time during which the terminal maintains power consistency / phase continuity may be referred to as a nominal time domain window (TDW) and / or an actual TDW. An event may occur in which power consistency / phase continuity is not maintained in the nominal TDW, and power consistency / phase continuity may not be maintained after the event. In this case, the TDW before the event may be defined as an actual TDW. The base station may instruct the terminal to maintain power consistency / phase continuity (e.g., time coherence) in the TDW before the event through signaling (e.g., RRC signaling). The terminal may maintain power consistency / phase continuity (e.g., time coherence) in the TDW before the event according to an instruction from the base station. Depending on the capabilities of the terminal, the actual TDW may be restarted after the event, and the terminal may maintain power consistency / phase continuity in the actual TDW after the event.

[0095] Events can be divided into semi-static events and dynamic events. Semi-static events may refer to events where power consistency / phase continuity is not maintained due to semi-static configuration (eg, frequency hopping, TDD time slot mode, etc.) before the nominal TDW is terminated.

[0096] The terminal may assume that the actual TDW starts after a semi-static event (e.g., frequency hopping, a change in a sounding reference signal (SRS) resource set, a change in a spatial relationship, and / or a change in a power control parameter) rather than after a dynamic event. In other words, the terminal may assume that power consistency / phase continuity is maintained after a semi-static event rather than after a dynamic event. The terminal may regard the following events as events that do not maintain power consistency / phase continuity. Depending on the capabilities of the terminal, the actual TDW may not be regenerated after the event.

[0097] A reception operation in a DL symbol indicated by signaling (e.g., RRC signaling) between UL symbols may be considered an event. A situation in which a gap of greater than 13 symbols (or 11 symbols when an extended cyclic prefix (CP) is used) occurs for two consecutive PUSCH / PUCCH transmissions may be considered an event. A situation in which a gap of no greater than 13 symbols or 11 symbols occurs for two consecutive PUSCH / PUCCH transmissions, but another UL signal / channel transmission is performed may be considered an event. When PUSCH repetition type A is used, when PUSCH repetition type B is used, or when a TB is mapped to multiple time slots (e.g., when TB processing is performed in multiple time slots), the discarding / cancellation of PUSCH according to the UL priority / multiplexing procedure, the discarding / cancellation of PUSCH due to differences between time slot modes, or the discarding / cancellation of PUSCH due to an UL cancellation indication may occur.

[0098] The occurrence of discard / cancellation of PUSCH can be regarded as an event. Discard / cancellation can refer to discard and / or cancellation. The change of the association relationship of the SRS resource set between two consecutive PUSCH instances can be regarded as an event. The situation where two different PUSCH instances are configured with their own SRS resource sets, and the spatial relationship or TCI of the SRS resources of the SRS resource sets belonging to the two different PUSCH instances is different can be regarded as an event. The change of at least one spatial relationship or power control parameter for two consecutive PUCCH instances can be regarded as an event. The reception operation of the timing advance (TA) command or the execution of the change or update of the TA to match the TA with the terminal's own limitations can be regarded as an event. The execution of frequency hopping of PUCCH or PUSCH can be regarded as an event.

[0099] Figure 5 is a conceptual diagram illustrating a first exemplary embodiment of UL transmission in resources including SD symbols and non-SD symbols.

[0100] Reference Figure 5 , the UL signal / channel can be transmitted in a resource including an SD symbol and a non-SD symbol (for example, an SD symbol and a non-SD symbol for a single frequency hopping). The non-SD symbol can be a UL symbol or a FL symbol. Transmission of a UL signal / channel with the same frequency resource can be performed in a time resource including both SD symbols and non-SD symbols. The UL signal / channel can be transmitted using the same antenna port. Therefore, the terminal can apply the same filter 1 to all symbols transmitting the UL signal / channel. Filter 1 can refer to a technique for reducing spectrum emissions to adjacent PRBs.

[0101] In the proposed method, the terminal can maintain power consistency and phase continuity when transmitting a UL signal / channel in a time resource including SD symbols and non-SD symbols.

[0102] As an example, the terminal may not change the filtering applied to the UL signal / channel.

[0103] The base station may instruct the terminal to perform frequency hopping on the UL signal / channel. The terminal may recognize the instruction from the base station. In this case, the terminal may apply the same filter 1 at least at the same hopping frequency, and apply filter 2 with a shifted center frequency at another hopping frequency. The time required to change the filtering (e.g., filtering scheme) may be considered to perform the transmission of the UL signal / channel.

[0104] The base station may instruct the terminal to perform DM-RS bundling through signaling (e.g., RRC signaling). The terminal may recognize the instruction from the base station. The terminal and / or the base station may change the filtering (e.g., filtering scheme) at the boundary between the SD symbol and the non-SD symbol. For example, the terminal and / or the base station may apply filtering 1 with a narrow bandwidth in the SD symbol and filtering 2 with a wide bandwidth in the non-SD symbol.

[0105] Figure 6 is a conceptual diagram illustrating a second exemplary embodiment of UL transmission in resources including SD symbols and non-SD symbols.

[0106] Reference Figure 6 , a UL signal / channel may be transmitted in a resource including SD symbols and non-SD symbols (e.g., SD symbols and non-SD symbols used for single frequency hopping). The non-SD symbol may be a UL symbol or a FL symbol. The base station may instruct the terminal to perform DM-RS bundling during repeated transmission of the UL signal / channel. The terminal may recognize the indication from the base station. The terminal may regard the TDW before the event occurs as the actual TDW, and may transmit the UL signal / channel in the actual TDW considered. After the event occurs, the terminal may generate (e.g., configure) a new actual TDW based on the capabilities and / or signaling of the terminal (e.g., indication and / or configuration from the base station via RRC signaling). Time coherence may be maintained in the new actual TDW.

[0107] In the proposed method, the terminal and / or the base station may regard the event as occurring at the boundary between the SD symbol and the non-SD symbol.

[0108] For example, the terminal and / or the base station may derive the boundary between the SD symbol and the non-SD symbol based on the TDD slot mode. Alternatively, the base station may indicate the location of the SD slot, SD symbol and / or UL subband (e.g., RB set) to the terminal through signaling. The terminal may derive the boundary between the SD symbol and the non-SD symbol based on the indication from the base station. The above information (or operation) may be indicated by a semi-static configuration. Therefore, the terminal may regard the event as a semi-static event.

[0109] The base station can dynamically indicate the mode of the SD symbol and / or the position of the UL subband to the terminal. The terminal can recognize the indication from the base station. The group common DCI format can be used to indicate the mode of the SD symbol and / or the position of the UL subband. Alternatively, the mode of the SD symbol and / or the position of the UL subband can be implicitly derived based on the scheduling DCI. The scheduling DCI can be a DCI including resource allocation information for DL ​​communication or UL communication. The base station can use MAC CE to instruct the terminal to activate or deactivate time / frequency resources (e.g., part of the time / frequency resources). The terminal can recognize the indication from the base station. The terminal can regard the indication (e.g., an indication of activating or deactivating time / frequency resources) as a dynamic event. Time / frequency resources can refer to time resources and / or frequency resources.

[0110] After a semi-static event or a dynamic event occurs, the terminal may generate (e.g., configure) a new actual TDW according to the capabilities of the terminal. Alternatively, the terminal may not generate a new actual TDW according to the capabilities of the terminal. In this case, channel estimation may be performed for each time slot. The maximum length (e.g., the maximum number of time slots) during which DM-RS bundling can be configured according to the capabilities of the terminal. An actual TDW that does not exceed the maximum length during which DM-RS bundling can be performed may be generated. The base station may instruct the terminal to activate (e.g., enable) a specific RRC parameter (e.g., pusch-WindowRestart or pucch-WindowRestart). The terminal may recognize the indication from the base station. The terminal may start a new actual TDW from the first symbol of the PUSCH transmission (or PUCCH transmission) where the event occurs. The last symbol of the actual TDW is no later than the last symbol of the nominal TDW.

[0111] The transmission of the UL signal / channel at the boundary between the SD symbol and the non-SD symbol may be affected. In other words, the power consistency / phase continuity of the UL signal / channel may not be maintained at the boundary between the SD symbol and the non-SD symbol. Whether the power consistency / phase continuity of the UL signal / channel is maintained at the boundary between the SD symbol and the non-SD symbol may be indicated by signaling of the base station (e.g., RRC signaling).

[0112] 2.2 UL signals / channels allowed to be transmitted in SD symbols

[0113] When a UL signal / channel is transmitted in an SD symbol, the frequency resource through which the UL signal / channel is transmitted may belong to the UL subband of the SD symbol. Alternatively, some frequency resources through which the UL signal / channel is transmitted may belong to a frequency band other than the UL subband of the SD symbol. In this case, the transmission of the UL signal / channel may be discarded / canceled.

[0114] If a portion of the transmission of the UL signal / channel is determined to be invalid, the terminal may discard / cancel the entire transmission of the UL signal / channel. If the transmission of the UL signal / channel is discarded / cancelled due to the slot mode, the transmission of the UL signal / channel may be discarded / cancelled at all hopping frequencies. If the transmission of the UL signal / channel is cancelled by the ULCI, the transmission of the UL signal / channel may be discarded / cancelled at all hopping frequencies.

[0115] If the bandwidth of the UL subband varies according to the symbol, the terminal may transmit the UL signal / channel on a frequency hopping basis. A one-time transmission process of the UL signal / channel may be performed based on intra-slot frequency hopping. A repeated transmission process of the UL signal / channel may be performed based on intra-slot frequency hopping or inter-slot frequency hopping. Transmission of the UL signal / channel based on frequency hopping may correspond to one UL signal / channel repetition.

[0116] Figure 7 is a conceptual diagram showing a first exemplary embodiment of UL signal / channel transmission based on frequency hopping.

[0117] Reference Figure 7 , the terminal may transmit a UL signal / channel based on frequency hopping. The first frequency hopping of the UL signal / channel may be transmitted in a symbol including an SD symbol. The first frequency hopping of the UL signal / channel may be scheduled in a frequency resource of a UL subband belonging to an SD symbol. The second frequency hopping of the UL signal / channel may not belong to a UL subband of an SD symbol. In other words, the second frequency hopping of the UL signal / channel may belong to a UL subband of a non-SD symbol. Therefore, the frequency hopping of the UL signal / channel may be transmitted in a valid UL resource of a symbol.

[0118] According to the proposed method, the terminal can determine a UL subband capable of transmitting a UL signal / channel for each frequency hopping.

[0119] If the frequency hopping of the UL signal / channel is outside the UL subband of the SD symbol, the terminal may discard or cancel the transmission of the UL signal / channel or the repetition (e.g., actual repetition, actual instance) of the UL signal / channel. When repeated transmission of PUCCH or PUSCH repetition type A is performed (e.g., when availableSlotCounting is configured), the discarding / cancellation of the UL signal / channel may not be counted in the number of repetitions. In other words, the time slot in which the transmission of the UL signal / channel is discarded / cancelled may not be considered as an available time slot.

[0120] In order to extend the reach of the UL signal / channel and reduce its delay, the base station may instruct the terminal to repeatedly transmit the UL signal / channel. Repeated transmission may be classified into repeated transmission according to time slot periodicity (e.g., sub-time slot periodicity) and continuous repeated transmission. The indication of repeated transmission of the UL signal / channel may include an indication of PUSCH repetition type A or PUSCH repetition type B.

[0121] 2.2.1 PUSCH transmission

[0122] Repeated transmission of PUCCH and / or PUSCH repetition type A can be performed in consecutive time slots (e.g., sub-time slots). The same time / frequency resources can be allocated for PUCCH repetition and / or PUSCH repetition type A in each time slot (e.g., sub-time slot). In order to ensure the number of repetitions of PUSCH in a TDD-based communication system, the base station can indicate a parameter (e.g., AvailableSlotCounting) to the terminal through a separate signaling (e.g., RRC signaling). The terminal can recognize the indication from the base station. The number of repetitions of PUCCH can be guaranteed without signaling from the base station (e.g., signaling of AvailableSlotCounting). Operations according to PUSCH repetition type A can at least be scheduled by DCI.

[0123] In the proposed method, the symbols allocated for PUSCH may consist of only SD symbols or only non-SD symbols. In this case, PUSCH (e.g., PUSCH transmission, PUSCH instance, PUSCH repetition) may be determined to be valid. When PUSCH is scheduled by DCI, the frequency resources of PUSCH indicated by DCI may belong to the UL subband (e.g., the UL subband of SD symbols), and the time resources of PUSCH indicated by DCI symbols may have the same duplex.

[0124] In another proposed method, when the frequency resource of the PUSCH belongs to the UL subband, the PUSCH (eg, PUSCH transmission, PUSCH instance) may be determined to be valid regardless of whether the symbols allocated for the PUSCH are SD symbols or non-SD symbols.

[0125] The base station may configure (e.g., indicate) PUSCH repetition type B to the terminal. The terminal may receive the configuration of PUSCH repetition type B from the base station. PUSCH resources may be determined by scheduling DCI. Alternatively, PUSCH resources may be indicated by RRC signaling. For example, type 1 configuration grant (CG) PUSCH may be configured to the terminal by RRC signaling. Alternatively, PUSCH resources may be indicated by RRC signaling and DCI (e.g., activation DCI). For example, type 2 CG PUSCH may be configured to the terminal by RRC signaling and activation DCI.

[0126] When PUSCH repetition type B is configured, nominal PUSCH repetitions may be allocated continuously in the time domain. One nominal PUSCH repetition may be divided into two or more actual PUSCH repetitions at the boundary of a slot, the boundary of a DL symbol, or the boundary of a FL symbol. The boundary of a DL symbol or the boundary of a FL symbol may mean the boundary between a DL symbol and a FL symbol. Additional DM-RS symbols may be allocated for actual PUSCH repetitions, and rate matching operations for data may be performed on the remaining symbols. A DM-RS symbol may mean a symbol in which a DM-RS is mapped (e.g., transmitted).

[0127] Considering the SD symbol, the terminal may perform a monitoring operation on the search space set (SSS) and perform PUSCH transmission. In the present disclosure, the monitoring operation on the SSS (i.e., the SSS monitoring operation) may refer to the operation of the reception operation of the DCI included in the SSS. The terminal may select one of the DL reception operation and the UL transmission operation by considering the priority.

[0128] Figure 8 is a conceptual diagram illustrating a first exemplary embodiment of an SSS monitoring operation.

[0129] Reference Figure 8 , when UL signal / channel repetition (e.g., UL signal / channel instance) is configured, the terminal may perform an SSS monitoring operation. When the terminal performs an SSS monitoring operation, continuous transmission of the UL signal / channel may be scheduled to the terminal. Alternatively, when the terminal performs an SSS monitoring operation, the terminal may repeatedly transmit the UL signal / channel. The operation may be an operation according to PUCCH repetition or PUSCH repetition type A. Figure 8 In an exemplary embodiment of , frequency hopping may not be performed. Since the terminal performs a DL reception operation in an SD symbol in which an SSS monitoring operation is performed, the terminal may not perform an UL transmission operation in an SD symbol. The base station may perform appropriate scheduling according to the periodicity of the SSS so that the SSS monitoring operation and the UL transmission operation are not performed simultaneously. The above operations may be applied to operations configured according to scheduling DCI, activation DCI, and / or CG.

[0130] SD symbols may be configured for terminals located at the edge of a cell. Therefore, it may be preferred that the transmission of URLLC traffic is not supported in SD symbols. The terminal may not receive an indication of a priority index. Alternatively, the terminal may receive an indication of "priority index = 0". The terminal may perform an SSS monitoring operation in an SD symbol. Since there may be data scheduled by DCI having a CRC scrambled by a cell (C)-radio network temporary identifier (RNTI) or a modulation and coding scheme (MCS)-RNTI, it may be preferred that the terminal SD receives the scheduling DCI in the symbol. In the proposed method, the terminal may consider the priority of the SSS monitoring operation to be higher than the priority of the data transmission and reception operations.

[0131] For monitoring operations on a control resource set (CORESET) / SSS, some SD symbols may be allocated for DL ​​reception operations. Therefore, the terminal may not be able to perform continuous UL signal / channel transmission in continuous SD symbols. CORESET / SSS may mean CORESET and / or SSS. In the proposed method, when performing operations according to PUSCH repetition type B, the terminal may regard SD symbols as invalid symbols. The terminal may use FL symbols and / or UL symbols to perform operations according to PUSCH repetition type B.

[0132] When an operation according to PUSCH repetition type B is performed, a partition instance or actual repetition may be generated (eg, configured) at a boundary between an SD symbol and a non-SD symbol. The partition instance may be generated by a base station and / or a terminal.

[0133] Fig. 9 is a conceptual diagram illustrating a second exemplary embodiment of an SSS monitoring operation.

[0134] Reference Fig. 9 , an operation according to PUSCH repetition type B may be performed in SD symbols, and the terminal may perform continuous UL signal / channel transmission. An operation according to PUSCH repetition type B may be performed without performing frequency hopping. The terminal may reduce spectrum emission by applying filter 1 on SD symbols. Fig. 9 In this context, the actual PUSCH repetition may refer to an actual PUSCH instance.

[0135] Fig.10 is a conceptual diagram illustrating a third exemplary embodiment of an SSS monitoring operation.

[0136] Reference Fig.10, an operation according to PUSCH repetition type B can be performed in an SD symbol, and the terminal can perform continuous UL signal / channel transmission. In the operation according to PUSCH repetition type B, frequency hopping (e.g., inter-slot frequency hopping) can be applied. In this case, the terminal can apply filter 1 to the SD symbol and filter 2 to the non-SD symbol. At the boundary between the SD symbol and the non-SD symbol, the filtering can be changed from filter 1 to filter 2. The operation of changing the filtering may refer to an operation of changing the center frequency or an operation of extending the bandwidth without changing the center frequency. Fig.10 In this context, the actual PUSCH repetition may refer to an actual PUSCH instance.

[0137] A gap may be required before and / or after an SD symbol in which an operation according to PUSCH repetition type B and an SSS monitoring operation are performed.

[0138] In the proposed method, the operation of the terminal performing the operation according to the PUSCH repetition type B can be switched to the DL reception operation in the SD symbol in which the SSS monitoring operation is performed. At the boundary of the SD symbol, the nominal PUSCH repetition (or nominal PUSCH repetition) can be divided into the actual PUSCH repetition (or actual PUSCH instance). A switching gap may be required between the transmission operation of the SSS monitoring operation and the actual PUSCH repetition. DL to UL gaps and / or UL to DL gaps can be considered.

[0139] Taking into account the DL to UL gap, the round trip delay (RTD) reflecting the distance between the terminal and the base station can be added to the duplex switching delay. RTD can be the dominant factor. If the terminal is located at the edge of the cell, SD symbols for the DL to UL gap can be allocated.

[0140] In the proposed method, the base station may indicate the DL-to-UL gap (e.g., the number of SD symbols) to the terminal through signaling (e.g., RRC signaling). The DL-to-UL gap may be applied from the last symbol of the DL signal / channel received by the terminal. The first symbol of the UL signal / channel that the terminal wishes to transmit may be derived by applying the DL-to-UL gap from the last symbol of the DL signal / channel. Information indicating whether the DL-to-UL gap is applied may be included in the scheduling information for PUSCH repetition type B.

[0141] Taking into account the UL-to-DL gap, the duplex switching delay may be taken into account. The DL-to-UL gap may be reflected in a previous or subsequent symbol at a boundary between SD symbols or a boundary between an SD symbol and a UL symbol. When the nominal PUSCH repetition is divided, two actual PUSCH repetitions (e.g., actual PUSCH repetition 1 and actual PUSCH repetition 2) may be generated. Taking into account actual PUSCH repetition 1 and PUSCH actual repetition 2, no additional symbols may be allocated to take into account the UL-to-DL gap, and the UL-to-DL gap may be reflected in PUSCH actual repetition 1. PUSCH actual repetition 2 may start from a DM-RS symbol. Therefore, in order to take into account the duplex switching delay, transmission may not be performed in a portion of the last symbol of PUSCH actual repetition 1.

[0142] According to another proposed method, the gap symbol (or gap sample) may be applied to a subsequent UL signal / channel in the time domain. If the first symbol of the subsequent UL signal / channel is invalid, part or all of the subsequent UL signal / channel may not be transmitted. In the case of PRACH, PUCCH and / or PUSCH, their entire transmission may not be performed. If some SRS symbols overlap with the gap symbols, the SRS may not be transmitted in some SRS symbols overlapping with the gap symbols, and the SRS may be transmitted in the remaining SRS symbols that do not overlap with the gap symbols. The SRS symbol may be a symbol configured for SRS transmission.

[0143] In the time domain, the subsequent UL signal / channel may be transmitted starting from the first symbol after the gap symbol. In this case, the last symbol of the subsequent UL signal / channel may be punctured and / or the size (amount) of the gap symbol may be discarded. Alternatively, a rate matching operation may be performed on symbols other than the last symbol of the subsequent UL signal / channel.

[0144] The length of a gap symbol (e.g., a symbol for a DL-to-UL gap or a UL-to-DL gap) may vary according to the SCS. The SCS may be the SCS of an active DL BWP or an active UL BWP. The SCS may be a combination of the SCS of an active DL BWP and the SCS of an active UL BWP. Alternatively, the SCS may be configured based on a reference parameter set.

[0145] The Nth symbol from the last symbol of the received DL signal / channel can be gap TA may be additionally applied after N symbols to determine the first symbol of the UL signal / channel. Alternatively, the TA may be applied after N symbols from the last symbol of the received DL signal / channel. gap After N symbols, the first symbol of the UL signal / channel is determined without additionally applying TA. gap Can be the number of gap symbols.

[0146] A minimum gap (e.g., N ) may be required between receiving the last symbol of the SSB and transmitting the first symbol of the PRACH. gap According to the following Table 1, N can be applied according to the SCS of the PRACH preamble. gap The value of .

[0147] [Table 1]

[0148] SCS of PRACH preamble <![CDATA[N gap ]]> 1.25kHz or 5kHz 0 15kHz, 30kHz, 60kHz or 120kHz 2 480kHz 8 960kHz 16

[0149] The gap symbol may be regarded as an invalid symbol pattern. The number of gap symbols, an enable indication of the gap symbol and / or a disable indication of the gap symbol may be included in the scheduling information transmitted to the terminal. The gap symbol may appear at the boundary between the SD symbol and the UL symbol.

[0150] exist Fig. 9 In an exemplary embodiment of , some SD symbols may be regarded as gap symbols. Since data is mapped to the last symbol of the preceding UL signal / channel, if some SD symbols are regarded as gap symbols, a puncturing operation, a dropping operation, and / or a rate matching operation may be easily applied. Fig.10 In an exemplary embodiment of the present invention, some UL symbols may be regarded as gap symbols. “Regarding a part of the UL symbol as a gap symbol” may refer to performing a puncturing operation, a discarding operation, and / or a delaying operation on the first symbol of a subsequent UL signal / channel. Since a puncturing operation and / or a discarding operation may be performed on a DM-RS symbol, a delaying operation may be preferably performed on the UL signal / channel.

[0151] 2.2.2SRS Transmission

[0152] Considering the SD symbol in the SRS transmission, the terminal can operate as follows. An SRS resource set may include one or more SRS resources. An SRS resource may include one or more SRS symbols. The transmission of all SRS ports may be performed in the same symbol (e.g., the same SRS symbol), and the number of SRS symbols may be the same as the number of SRS ports that the SRS resource has. The number of SRS ports may be 4 or less. Different SRS ports may be distinguished in the same symbol based on at least one of repetition, different transmission combs, cyclic shift, partial detection, or frequency hopping.

[0153] Fig.11 is a conceptual diagram showing a first exemplary embodiment of an SRS resource having two ports.

[0154] Reference Fig.11 , the terminal may transmit the SRS in an SRS resource having two ports (eg, two SRS ports).

[0155] Fig.12 is a conceptual diagram showing a first exemplary embodiment of an SRS resource having four ports.

[0156] Reference Fig.12 , the terminal may transmit the SRS in an SRS resource having four ports (eg, four SRS ports).

[0157] Fig.13 is a conceptual diagram showing a first exemplary embodiment of an SRS resource having eight ports.

[0158] Reference Fig.13 , the terminal may transmit the SRS in an SRS resource having eight ports (eg, eight SRS ports).

[0159] Fig.14 is a conceptual diagram showing a second exemplary embodiment of an SRS resource having eight ports.

[0160] Reference Fig.14 , the terminal can transmit SRS in an SRS resource having eight ports (e.g., eight SRS ports). When eight ports are defined, the SRS resource (e.g., m symbols) can be divided into s port sets. SRS transmissions of a specific SRS port can all be performed in SRS symbols belonging to one symbol set. Each of m and s can be a natural number.

[0161] When eight ports are defined, s is 2, m is 4, half of the SRS ports can be divided into different symbol sets, and SRS transmission can be performed alternately in SRS resources (e.g., SRS sub-resources) belonging to one symbol set. m can be the number of symbols belonging to the SRS resource configured in one time slot. s can be the value of dividing the SRS port. A subset of the SRS port can be repeatedly mapped to m symbols in the order of 1, 2, 3, ..., and s. Therefore, SRS transmission of each of all SRS ports in the s ports (e.g., s symbols) belonging to the SRS resource can be performed once.

[0162] According to the configuration of the base station, the terminal may receive an indication of the number of repetitions R. In this case, the SRS transmission may be repeated R times. If frequency hopping is performed in the SRS transmission, frequency hopping may not be performed when the SRS transmission is repeated R times, and frequency hopping may be performed after the SRS transmission is repeated R times.

[0163] when Fig.13 When the exemplary embodiment of the present invention is summarized, SRS transmission may be performed in 8×R symbols, and the SRS may be transmitted in the same frequency resource in R consecutive symbols.

[0164] when Fig.14When the exemplary embodiment of is summarized, SRS transmission may be performed in s×R symbols, and the SRS may be transmitted in the same frequency resource in consecutive s×R symbols.

[0165] The unit in which the SRS transmission of all SRS ports occurs once in each of s SRS symbols may be referred to as an SRS port subset. According to the configuration of the base station, the SRS resource may include SD symbols and non-SD symbols, and the terminal may transmit SRS in the SRS resource. Symbols with changed duplex types may appear in the same SRS port subset.

[0166] In the proposed method, the terminal may adopt the same duplex type in the SRS port subset. In other words, the terminal may assume that the SRS resources for the SRS port subset include only SD symbols or only non-SD symbols.

[0167] In another proposed method, if the duplex type is changed, it may be difficult for the base station to perform processing or Rx processing on the same Rx beam. Therefore, the terminal may determine that the SRS port subset is invalid.

[0168] The terminal may transmit SRS in a part of the invalid SRS port subset. Alternatively, the terminal may transmit SRS in the invalid SRS port subset. The terminal may perform aperiodic SRS transmission in the invalid SRS port subset. The terminal may perform aperiodic SRS transmission in the valid SRS port subset and may discard aperiodic SRS transmission in the invalid SRS port subset.

[0169] If the entire SRS port subset is valid, the terminal may perform aperiodic SRS transmission in the SRS resource for the SRS port subset. If a portion of the SRS port subset is invalid, the terminal may not perform aperiodic SRS transmission in the invalid time slot (e.g., SRS resource) of the SRS port subset. The base station may instruct the terminal to transmit SRS in an available time slot through signaling (e.g., RRC signaling). In this case, the terminal may determine whether the SRS resource is valid in the next time slot.

[0170] The terminal may receive an indication of a repetition factor (R) for UL beam refinement from the base station. The above operation may be a step in the UL beam management procedure. If the terminal repeatedly transmits the SRS using the same Tx beam, the base station may perform a hypothesis test to determine the Rx beam. Frequency hopping of the SRS may be performed according to the technical specification.

[0171] Frequency hopping may not be performed in SRS resources, and SRS may be transmitted for UL beam management purposes. In this case, if the duplex type changes, it may be difficult for the base station to measure the reference signal received power (RSRP) based on the same conditions. The terminal may not transmit SRS in certain SRS resources.

[0172] Aperiodic SRS transmission may be considered. The base station may instruct the terminal to perform aperiodic SRS transmission in Ns consecutive symbols through signaling (e.g., RRC signaling). The terminal may recognize the indication from the base station and operate based on the indication. The base station may instruct the terminal to perform intra-slot frequency hopping through signaling (e.g., RRC signaling). The terminal may recognize the indication from the base station and operate based on the indication. Ns may be one of 2, 4, 8, 10, 12, or 14. The base station may indicate to the terminal through signaling (e.g., RRC signaling) that "repetition factor R=1".

[0173] The BWP may be divided into Ns subbands. The Ns subbands may have the same size. The terminal may transmit the SRS over the entire frequency band of the BWP in Ns symbols. When Ns ≥ 4 and R ≥ 2 are indicated, Ns may be indicated as a number divisible by R. The terminal may transmit the SRS over the entire frequency band of the BWP in R adjacent symbols using Ns / R subbands with the same bandwidth.

[0174] Periodic SRS transmission or semi-static SRS transmission may be considered. When Ns=1 is indicated, the base station may instruct the terminal to perform inter-slot frequency hopping through signaling. When Ns=2, 4, 8, 10, 12, or 14 is indicated, the base station may instruct the terminal to perform periodic SRS transmission or semi-static SRS transmission, and perform inter-slot frequency hopping or intra-slot frequency hopping through signaling.

[0175] When Ns=R is indicated, the terminal may perform inter-slot frequency hopping and transmit the SRS using the same frequency resource in R adjacent symbols. Operations related to SD symbols may be further considered. Instead of performing frequency hopping in R SRS symbols, the terminal may transmit the SRS through the entire frequency band of the BWP in Ns SRS symbols by performing frequency hopping. In this case, if the duplex type changes, a portion of the SRS symbol subset may deviate from the UL subband. The portion of the SRS symbol subset that deviates from the UL subband may be determined to be invalid.

[0176] In the proposed method, the validity of SRS resources may be determined based on SRS symbol subsets.The terminal may determine the validity of SRS resources based on SRS symbol subsets, and may discard SRS transmissions in a subset (eg, SRS symbol subset) determined to be invalid.

[0177] In another proposed method, the validity of the SRS resource may be determined based on the SRS resource symbol. The terminal may discard SRS transmission in the SRS symbol determined to be invalid.

[0178] In another proposed method, if all subsets of SRS resources are valid, the terminal may determine that the SRS resources are valid. The terminal may discard SRS transmissions in SRS resources determined to be invalid. The discarded SRS transmissions may be performed in the next time slot according to the configuration indicated to the terminal.

[0179] SRS transmission may be performed for the purpose of antenna switching. If the purpose of the SRS resource set is indicated as antenna switching, the base station may receive the SRS of the terminal in the SRS resource set (eg, SRS resources belonging to the SRS resource set) to obtain DL channel state information (CSI).

[0180] When xTyR is indicated or configured, simultaneous transmission can be performed in x ports, and simultaneous reception can be performed in y ports. xTyR can be expressed as 1T2R, 1T4R, 2T4R, 2T2R, etc. When SRS transmission is repeated an integer number of times in x ports, SRS reception operations can be performed in y ports.

[0181] When xTyR is indicated or configured, the terminal may require separate processing time for antenna switching. When the SRS port used for SRS transmission of the terminal changes or when the SRS resource changes, at least one symbol between the SRS symbols may be allocated as a gap symbol. In order to perform SRS transmission in two SRS symbols, the terminal may assume the order of "SRS symbol-gap symbol-SRS symbol" and perform SRS transmission based on this assumption.

[0182] Each value of x and y for "xTyR" may be determined according to the form of a terminal. A time resource (eg, an SRS symbol) for transmitting an SRS may vary according to the configuration of an SRS resource set.

[0183] In the case of 1T2R, one or two sets of SRS resources may be indicated, and semi-static SRS transmission may be considered. Zero or one SRS resource set may be indicated, and periodic SRS transmission may be considered. If the SRS resource set is indicated by different resource types (e.g., periodic, semi-static), the two semi-static SRS resource sets may not be activated at the same time. Two SRS resources belonging to one SRS resource set may have different symbols. Different SRS resource sets may have different SRS ports.

[0184] In the case of 2T4R, one or two SRS resource sets may be indicated. SRS transmission may be performed in two SRS resources belonging to one SRS resource set (e.g., at different symbols). Each SRS resource belonging to one SRS resource set may have two SRS ports. Different SRS resources may have a pair of SRS ports that do not overlap with each other.

[0185] In the case of 1T4R, zero or one SRS resource set may be indicated. The resource type of the SRS resource set may be indicated as periodic or semi-static. An SRS resource set may include four SRS resources. The SRS resources may be different symbols. The SRS ports of the SRS resources may correspond to different antenna ports (e.g., different DL DM-RS ports).

[0186] In the case of 1T4R, zero or two SRS resource sets may be indicated. The resource type of the SRS resource set may be indicated aperiodically. Each SRS resource set may include four SRS resources, and SRS transmission may be performed in different symbols within two time slots. The SRS ports of the SRS resources within the two time slots may correspond to different antenna ports (e.g., different DL DM-RS ports). Each of the two SRS resource sets may include two SRS resources. Alternatively, one SRS resource set may include one SRS resource, while the other SRS resource set may include three SRS resources.

[0187] In case of 1T2R, 2T2R, 4T4R or 8T8R, zero, one or two SRS resource sets may be indicated. The number of SRS ports used for SRS resources may be 1, 2 or 4.

[0188] The above exemplary embodiments can be interpreted as the operation of the terminal. Two or more SRS resource sets can be considered in two or more time slots. The reason for the above situation is that the position of the symbol that can be configured as an SRS resource in a time slot is limited, and a gap symbol is required between SRS symbols. Considering SD symbols and non-SD symbols, SRS transmission according to SRS ports can be performed in invalid symbols.

[0189] Two or more SRS resource sets may be considered in one slot. Since an SRS resource set may include independent SRS resources, SRS transmission may be performed in an invalid frequency resource outside the UL subband in consideration of SD symbols and non-SD symbols. In other words, the SRS resource may be invalid.

[0190] In the proposed method, SRS transmission may be dropped in invalid time resources and / or frequency resources.

[0191] In another proposed method, for SRS transmission in SRS resources including SD symbols and non-SD symbols, the base station may apply separate Rx assumptions or Rx processing. Channel estimation for the case of performing SRS transmission of an SRS port in an SD symbol and channel estimation for the case of performing SRS transmission of an SRS port in a non-SD symbol may be managed differently.

[0192] Aperiodic SRS transmission may be performed in SRS resources (e.g., valid time and / or frequency resources) belonging to a triggered SRS resource set. Valid resources may be determined based on each of the above methods. Alternatively, valid resources may be determined based on a combination of the above methods. In order to determine an available time slot, the terminal may find a time slot in which all SRS resources of all SRS resource sets are valid.

[0193] 2.3 DM-RS bundling for DL ​​joint channel estimation

[0194] DL joint channel estimation may be performed. It may be preferred that power consistency / phase continuity is maintained at the base station for a predefined time period. The terminal may perform joint channel estimation on the DL signal / channel received from the base station for a predefined time period.

[0195] The reception resources for DL ​​signals / channels can be divided into at least two types. As the first type of reception resources for DL ​​signals / channels, the reception resources for DL ​​signals / channels can include both non-SD symbols and SD symbols. The above situation can be interpreted as Figure 5 The exemplary embodiment of the present invention is applied to the case of a reception operation of a DL signal / channel. As the second type of reception resource of the DL signal / channel, the reception resource of the DL signal / channel may include only non-SD symbols (eg, DL symbols or FL symbols). The above case may be interpreted as Figure 6 The exemplary embodiment of the present invention is applied to the case of receiving operation of a DL signal / channel. The following method can be applied to two types of receiving resources of a DL signal / channel. Alternatively, the following method can be applied to one of the two types of receiving resources of a DL signal / channel.

[0196] In the proposed method, the base station may instruct the terminal to perform joint channel estimation on the DL signal / channel through signaling (e.g., RRC signaling). The terminal may perform joint channel estimation on the DL signal / channel based on the instruction from the base station. For example, the base station may transmit an instruction to enable or disable joint channel estimation of the DL signal / channel to the terminal. When the joint channel estimation of the DL signal / channel is enabled, the terminal may perform joint channel estimation on the DL signal / channel. When the joint channel estimation of the DL signal / channel is disabled, the terminal may not perform joint channel estimation on the DL signal / channel.

[0197] In another proposed method, the terminal may assume that the power consistency / phase continuity of the DL signal / channel scheduled by the base station is maintained.

[0198] When a DL signal / channel is repeatedly received, the terminal may assume that power consistency / phase continuity is maintained when receiving all repetitions of the DL signal / channel. In an NR communication system, the terminal may receive the PDSCH in multiple time slots. The base station may indicate the pdsch-AggregationFactor to the terminal through signaling (e.g., RRC signaling). Alternatively, the base station may transmit scheduling information including a time domain resource allocation (TDRA) index indicating the repetitionNumber (number of repetitions) to the terminal. In order to repeatedly receive a DL signal / channel K times, K time slots may be required.

[0199] According to the technical specification, in order to receive each PDSCH, the terminal can perform independent channel estimation. According to the proposed method, the PDSCH DM-RS belonging to one time slot can be used for channel estimation for decoding the PDSCH belonging to another time slot. The PDSCH DM-RS can be a DM-RS for decoding / demodulating the PDSCH.

[0200] In the proposed method, the terminal reports UE capability information to the base station, which includes information about the maximum length of the TDW supported by the terminal. The base station can receive the UE capability information from the terminal and identify the maximum length of the TDW supported by the terminal based on the UE capability information. The base station can indicate information about the length of the TDW (e.g., nominal TDW) to the terminal through signaling (e.g., RRC signaling). The terminal can identify the length of the TDW (e.g., nominal TDW) indicated by the base station.

[0201] 2.4 DL signals / channels allowed to be received in SD symbols

[0202] The terminal can receive a tracking reference signal (TRS) from a base station and perform DL maintenance (e.g., time synchronization and / or frequency synchronization) based on the TRS. TRS can be interpreted as a type of CSI-RS. The terminal can receive TRS in one time slot or in adjacent time slots according to the configuration of the base station. The terminal receives TRS in two TRS symbols within one time slot. Alternatively, the terminal can receive TRS in two TRS symbols in each adjacent time slot. When the adjacent time slot is 2 time slots, TRS can be received in 4 TRS symbols. TRS symbols can be symbols configured for TRS transmission and reception.

[0203] Fig.15 is a conceptual diagram illustrating a first exemplary embodiment of a TRS symbol.

[0204] Reference Fig.15, TRS symbols in a time slot may have a specific interval (e.g., four OFDM symbols). TRS symbols belonging to SD symbols and TRS symbols belonging to non-SD symbols may experience different radio channels. The terminal may not be able to use TRS to obtain time synchronization and / or frequency synchronization. This is because different virtualizations may be applied to TRS (e.g., TRS symbols). In this case, TRS symbols (e.g., TRS) may have different per-resource element energies (EPREs). TRS symbols (e.g., TRS) may have different transmission configuration indicator (TCI) states (e.g., qcl-typeD).

[0205] In the proposed method, the terminal may perform DL maintenance based on TRS symbols belonging to symbols having the same duplex type (e.g., SD symbols or non-SD symbols). When one of two TRS symbols belongs to an SD symbol and the other TRS symbol belongs to a non-SD symbol, the terminal may not use the two TRS symbols for DL ​​maintenance.

[0206] In the proposed method, the terminal may determine validity in units of time slots including TRS symbols. A first time slot including only SD symbols and a second time slot including only non-SD symbols may be indicated to the terminal, and the first time slot and the second time slot may be adjacent time slots. Two time slots may include TRS symbols, and the TRS symbols of each of the two time slots may be determined to be valid. The terminal may process the TRS symbols in each time slot separately and perform DL maintenance based on the TRS symbols.

[0207] The base station may indicate to the terminal through signaling (e.g., RRC signaling) that the TRS is transmitted in two adjacent time slots. The terminal may recognize the indication from the base station. When the TRS is received in two adjacent time slots, the terminal may perform DL maintenance in units of each time slot or in units of two time slots. When DL maintenance is performed in units of each time slot, the terminal may perform DL maintenance on SD symbols and DL maintenance on non-SD symbols, respectively.

[0208] When TRS is received in two time slots and both time slots are determined to be valid, the terminal can perform DL maintenance based on the TRS received in the two time slots. When TRS is received in two time slots and at least one of the two time slots is determined to be invalid, the terminal may not use the TRS received in the two time slots for DL ​​maintenance.

[0209] The operation of the method according to the exemplary embodiment of the present disclosure can be implemented as a computer-readable program or code in a computer-readable recording medium. The computer-readable recording medium may include various recording devices for storing data that can be read by a computer system. In addition, the computer-readable recording medium can store and execute a program or code that can be distributed in a computer system connected via a network and read by a computer in a distributed manner.

[0210] The computer readable recording medium may include a hardware device specially configured to store and execute program commands, such as ROM, RAM or flash memory. The program command may include not only machine language codes created by a compiler, but also high-level language codes that can be executed by a computer using an interpreter.

[0211] Although certain aspects of the present disclosure have been described in the context of an apparatus, these aspects may indicate that the corresponding descriptions of the method and blocks or apparatus may correspond to the steps or features of the steps of the method. Similarly, the aspects described in the context of the method may be expressed as features of the corresponding blocks or items or corresponding apparatus. Some or all steps of the method may be performed by (or using) hardware devices (such as microprocessors, programmable computers, or electronic circuits). In some embodiments, one or more of the most important steps of the method may be performed by such an apparatus.

[0212] In some exemplary embodiments, a programmable logic device, such as a field programmable gate array, may be used to perform some or all of the functions of the methods described herein. In some exemplary embodiments, a field programmable gate array may operate with a microprocessor to perform one of the methods described herein. Typically, these methods are preferably performed by specific hardware devices.

[0213] The description of the present disclosure is only exemplary, therefore, changes that do not deviate from the essence of the present disclosure are intended to be within the scope of the present disclosure. Such changes should not be regarded as departing from the spirit and scope of the present disclosure. Therefore, it should be understood by those of ordinary skill in the art that various changes can be made in form and details without departing from the spirit and scope defined by the appended claims.

Claims

1. A terminal method, comprising: receiving information indicating to perform uplink (UL) transmission from a base station; performing the UL transmission in a resource region including sub-band full duplex (SBFD) symbols and non-SBFD symbols, At least one of downlink (DL) communication or UL communication can be performed in the SBFD symbol, and only one of the DL communication or the UL communication can be performed in the non-SBFD symbol.

2. The method according to claim 1, wherein: When performing the UL transmission, the terminal considers that an event in which coherence of the UL transmission is not maintained occurs in the resource region.

3. The method according to claim 2, wherein: The terminal maintains the coherence of the UL transmission in a time domain window (TDW) before the event according to the instruction from the base station.

4. The method according to claim 1, wherein: When an event in which the coherence of the UL transmission is not maintained occurs in the resource region, the terminal maintains the coherence of the UL transmission in a TDW after the event.

5. The method according to claim 4, wherein: The TDW is configured based on at least one of a capability of the terminal or an indication from the base station.

6. The method according to claim 1, wherein: The terminal maintains power consistency and phase continuity of communication in the SBFD symbols and the non-SBFD symbols.

7. The method according to claim 1, wherein: The information indicating that the UL transmission is performed indicates a physical uplink shared channel (PUSCH) repetition type A or a PUSCH repetition type B.

8. The method according to claim 1, wherein: When the UL transmission is performed based on the PUSCH repetition type A, the time slot in which the UL transmission is dropped is not considered as an available time slot.

9. The method according to claim 1, wherein: When the UL transmission is performed based on the PUSCH repetition type B, a partition instance is generated at a boundary between the SBFD symbol and the non-SBFD symbol.

10. The method according to claim 1, wherein: One or more symbols before a boundary between the SBFD symbol and the non-SBFD symbol or one or more symbols after the boundary are configured as one or more gap symbols.

11. The method according to claim 1, wherein: The UL transmission is a sounding reference signal (SRS) transmission, and validity of an SRS resource for performing the SRS transmission is determined on a symbol, symbol subset, or port subset basis at a boundary between the SBFD symbol and the non-SBFD symbol.

12. The method according to claim 1, wherein: The UL transmission is SRS transmission, and validity of SRS resources for performing the SRS transmission is determined in units of the SRS resources.

13. A terminal comprising at least one processor, wherein: The at least one processor causes the terminal to execute: receiving information indicating to perform uplink (UL) transmission from a base station; and performing the UL transmission in a resource region including sub-band full duplex (SBFD) symbols and non-SBFD symbols, At least one of downlink (DL) communication or UL communication can be performed in the SBFD symbol, and only one of the DL communication or the UL communication can be performed in the non-SBFD symbol.

14. The terminal according to claim 13, wherein: When performing the UL transmission, the terminal considers that an event in which coherence of the UL transmission is not maintained occurs in the resource region.

15. The terminal according to claim 13, wherein: When an event in which coherence of the UL transmission is not maintained occurs in the resource region, the terminal maintains coherence of the UL transmission in a time domain window (TDW) after the event.

16. The terminal according to claim 15, wherein: The TDW is configured based on at least one of a capability of the terminal or an indication from the base station.

17. The terminal according to claim 13, wherein: When the UL transmission is performed based on a physical uplink shared channel (PUSCH) repetition type A, a time slot in which the UL transmission is dropped is not considered as an available time slot.

18. The terminal according to claim 13, wherein: When the UL transmission is performed based on PUSCH repetition type B, a partition instance is generated at a boundary between the SBFD symbol and the non-SBFD symbol.

19. The terminal according to claim 13, wherein: One or more symbols before a boundary between the SBFD symbol and the non-SBFD symbol or one or more symbols after the boundary are configured as one or more gap symbols.

20. The terminal according to claim 13, wherein: The UL transmission is a sounding reference signal (SRS) transmission, and validity of an SRS resource for performing the SRS transmission is determined on a symbol, symbol subset, or port subset basis at a boundary between the SBFD symbol and the non-SBFD symbol.

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