Method and apparatus for transceiving uplink control channel in full duplex communication

Abstract

The embodiment of the invention provides a method for transmitting an uplink control channel by a terminal in full duplex communication, which comprises the following steps of: receiving uplink control channel configuration information; an uplink control channel resource is determined and uplink control information is transmitted, the uplink control channel resource being distinguished and determined according to whether a symbol allocated to the uplink control channel transmission contains an SBFD symbol configured with an uplink subband for full duplex communication.

Description

Technical Field

[0001] This embodiment provides a method and apparatus for transmitting and receiving an uplink control channel in a new generation radio access network (hereinafter referred to as New Radio (NR)). Background Art

[0002] Recently, 3GPP approved the "Study on New Radio Access Technology" research topic for next-generation radio access technology (i.e., 5G radio access technology). Based on this research, RAN WG1 is designing the frame structure, channel coding and modulation, waveform, and multiple access scheme for NR (New Radio). NR needs to be designed to not only offer higher data rates than LTE but also meet the various Quality of Service (QoS) requirements for each specific and segmented usage scenario.

[0003] As typical use cases for NR, eMBB (enhancement Mobile Broadband), mMTC (massive Machine Type Communication), and URLLC (Ultra Reliable and Low Latency Communication) have been defined. To meet the requirements of each use case, a flexible frame structure relative to LTE needs to be designed.

[0004] Since each usage scenario has different requirements for data rates, latency, reliability, coverage, etc., as a method to effectively meet the requirements of each usage scenario by constituting the frequency band of any NR system, a solution for effectively multiplexing radio resource units based on different numerologies (for example, subcarrier spacing, subframe, TTI (Transmission Time Interval), etc.) is proposed.

[0005] As part of this, a specific design is required for wireless networks that can transmit and receive uplink control channels in symbols suitable for full-duplex communication. Summary of the Invention

[0006] Problems to be solved by the invention

[0007] Embodiments of the present disclosure may provide a method and apparatus for transmitting and receiving an uplink control channel in full-duplex communication.

[0008] Solutions for solving problems

[0009] On the one hand, this embodiment can provide a method for a terminal to transmit an uplink control channel (Physical Uplink Control Channel, PUCCH) in full-duplex communication (Full Duplex), including: a step of receiving uplink control channel configuration information; a step of determining uplink control channel resources based on at least one of uplink control channel resource indication information (PUCCH resource indicator), control channel element (Control Channel Element, CCE) index information of received downlink control information, and payload size information of uplink control information; and a step of transmitting uplink control information through uplink control channel resources, wherein the uplink control channel resources are distinguished and determined based on whether the symbols allocated to the uplink control channel transmission include subband full duplex (SBFD) symbols of an uplink subband (uplink subband) configured for full-duplex communication.

[0010] On the other hand, this embodiment can provide a method for a base station to receive an uplink control channel (Physical Uplink Control Channel, PUCCH) in full-duplex communication (Full Duplex), including: a step of transmitting uplink control channel configuration information; and a step of receiving uplink control information by determining an uplink control channel resource based on at least one of uplink control channel resource indication information (PUCCH resource indicator), control channel element (CCE) index information of the transmitted downlink control information, and payload size information of the uplink control information, wherein the uplink control channel resource is distinguished and determined based on whether the symbol allocated to the uplink control channel reception contains a subband full duplex (SBFD) symbol of an uplink subband (uplink subband) configured for full-duplex communication.

[0011] On the other hand, this embodiment can provide a terminal for transmitting an uplink control channel (Physical Uplink Control Channel, PUCCH) in full-duplex communication (Full Duplex), including: a transmitting part, a receiving part and a control part, for controlling the operation of the transmitting part and the receiving part, wherein the control part is used to receive uplink control channel configuration information, determine the uplink control channel resources based on at least one of the uplink control channel resource indication information (PUCCH resource indicator), the control channel element (Control Channel Element, CCE) index information of the received downlink control information and the payload (payload) size information of the uplink control information, and transmit the uplink control information through the uplink control channel resources, wherein the uplink control channel resources are distinguished and determined based on whether the symbols allocated to the uplink control channel transmission include subband full duplex (SBFD) symbols of the uplink subband (uplink subband) configured for full-duplex communication.

[0012] On the other hand, this embodiment can provide a base station for receiving an uplink control channel (Physical Uplink Control Channel, PUCCH) in full-duplex communication (Full Duplex), including: a transmitting part, a receiving part and a control part, for controlling the operation of the transmitting part and the receiving part, wherein the control part is used to transmit uplink control channel configuration information, and receive uplink control information through uplink control channel resources determined based on at least one of uplink control channel resource indication information (PUCCH resource indicator), control channel element (Control Channel Element, CCE) index information of the transmitted downlink control information, and payload size information of the uplink control information, wherein the uplink control channel resources are distinguished and determined based on whether the symbols allocated to the uplink control channel reception include subband full duplex (SBFD) symbols of an uplink subband (uplink subband) configured for full-duplex communication.

[0013] Effects of the Invention

[0014] According to an embodiment of the present invention, a method and apparatus for efficiently transmitting and receiving an uplink control channel in a time slot or symbol applicable to full-duplex communication can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram that simply shows the structure of the NR wireless communication system applicable to this embodiment.

[0016] Figure 2 This is a diagram used to illustrate the frame structure in the NR system to which this embodiment is applicable.

[0017] Figure 3 This is a diagram for explaining a resource grid supporting a radio access technology to which this embodiment is applicable.

[0018] Figure 4 This is a diagram for explaining a bandwidth portion supporting a wireless access technology to which this embodiment is applicable.

[0019] Figure 5 This is a diagram exemplarily showing a synchronization signal block in a wireless access technology to which this embodiment is applicable.

[0020] Figure 6 This is a diagram for explaining a random access procedure in a wireless access technology to which this embodiment is applicable.

[0021] Figure 7 This is a diagram for explaining CORESET.

[0022] Figure 8 FIG. 1 is a diagram illustrating a process of a terminal receiving a downlink control channel according to an embodiment.

[0023] Figure 9 FIG. 1 is a diagram illustrating a process of transmitting a downlink control channel by a base station according to an embodiment.

[0024] Figure 10 and Figure 11 is a diagram for explaining a TDD frame in which an uplink subband is arranged in a downlink timeslot according to one embodiment.

[0025] Figure 12 is a diagram showing a structure of a terminal according to another embodiment.

[0026] Figure 13 is a diagram showing the structure of a base station according to another embodiment. DETAILED DESCRIPTION

[0027] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the exemplary drawings. When assigning figure marks to each drawing component, the same symbols may be assigned to the same components as much as possible even if they are shown in different drawings. In addition, when describing the present embodiment, if it is considered that the specific description of the relevant well-known structures or functions will obscure the gist of the technical idea, the detailed description thereof may be omitted. In this specification, when referring to "including", "having", "formed as", etc., unless "only" is used, it means that other parts may be added. In the case of representing a component in the singular, the plural case may be included unless there is a special clear record.

[0028] In addition, when describing the components of the present disclosure, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the nature, order, sequence, or number of the component is not limited by these terms.

[0029] In the description of the positional relationship of components, if it is stated that two or more components are "connected," "coupled," or "accessed," the two or more components may be directly "connected," "coupled," or "accessed," but it should be understood that other components may also "intervene" between the two or more components, thereby forming a "connection," "combination," or "access." The other components may also include one or more of the two or more components that are "connected," "coupled," or "accessed" to each other.

[0030] In the description of the temporal process relationship related to components, operating methods or manufacturing methods, when the temporal sequence or process sequence is described by, for example, "afterwards", "followed", "next", "before", etc., discontinuous situations may also be included unless "immediately" or "directly" is used.

[0031] On the other hand, when referring to the numerical value of a component or its corresponding information (such as grade, etc.), even if there is no separate explicit record, the numerical value or its corresponding information should be interpreted as including the error range that may arise from various factors (such as process factors, internal or external impact, noise, etc.).

[0032] The wireless communication system in this specification refers to a system that uses wireless resources to provide various communication services such as voice and data packets. The system may include: terminals, base stations or core networks.

[0033] The embodiments disclosed below are applicable to wireless communication systems using a variety of radio access technologies. For example, the embodiments are applicable to a variety of radio access technologies, such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), or non-orthogonal multiple access (NOMA). Furthermore, radio access technology not only refers to a specific access technology but also refers to various generations of communication technologies specified by various communication protocol organizations, such as 3GPP, 3GPP2, WiFi, Bluetooth, IEEE, ITU, etc. For example, CDMA can be implemented through radio technologies such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA can be implemented using wireless technologies such as the Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), and Enhanced Data Rates for GSM Evolution (EDGE). OFDMA can be implemented using wireless technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi, wireless LAN), IEEE 802.16 (WiMAX, Worldwide Interoperability for Microwave Access), IEEE 802-20, and Evolved UTRA (E-UTRA). IEEE 802.16m, as an evolution of IEEE 802.16e, provides backward compatibility with systems based on IEEE 802.16e. UTRA is part of the Universal Mobile Telecommunications System (UMTS).The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE), as part of evolved UMTS (E-UMTS) that uses evolved-UMTS terrestrial radio access (E-UTRA), employs OFDMA in the downlink and SC-FDMA in the uplink. As described above, this embodiment can be applied to currently available or commercialized radio access technologies, as well as to radio access technologies currently under development or to be developed in the future.

[0034] On the other hand, the term "terminal" in this specification is a comprehensive concept that refers to a device that includes a wireless communication module that communicates with a base station in a wireless communication system. It should be interpreted as including not only user equipment (UE) in Wideband Code Division Multiple Access (WCDMA), LTE, New Radio (NR), High Speed ​​Packet Access (HSPA), and IMT-2020 (5G or New Radio), but also mobile stations (MS), user terminals (UT), subscriber stations (SS), and wireless devices in GSM. In addition, depending on the usage form, the terminal can be a user portable device such as a smartphone. In the vehicle to everything (V2X) communication system, it can also mean a vehicle, a device including a wireless communication module in the vehicle, etc. In addition, in a machine type communication system, it can also mean an MTC terminal equipped with a communication module to perform machine type communication, a machine to machine (M2M) terminal, and an ultra-reliable low-latency communication (URLLC) terminal.

[0035] In this specification, a base station or cell refers to a terminal that communicates with a terminal in a network context, and encompasses various coverage areas, such as: Node-B, evolved Node-B (eNB), gNB (gNode-B), Low Power Node (LPN), sector, site, various antenna types, base transceiver system (BTS), access point, point (e.g., transmission point, reception point, transmission / reception point), relay node, ultra-large cell, macro cell, micro cell, pico cell, femto cell, remote radio head (RRH), radio unit (RU), small cell, etc. Furthermore, a cell may also encompass a bandwidth part (BWP) in the frequency domain. For example, a serving cell may refer to the activation BWP of a terminal.

[0036] Since there are base stations controlling more than one cell in the various types of cells listed above, the base station can be interpreted in two ways. It can indicate: (1) the device itself, which provides a supercell, macrocell, microcell, picocell, femtocell or small cell associated with the wireless area; or (2) the wireless area itself. In case (1), all devices that interact so that the devices providing the specified wireless area are controlled by the same object or that configure the wireless area through cooperation are indicated as base stations. According to the configuration method of the wireless area, an embodiment of a base station is: a point, a transmission / reception point, a transmission point, a reception point, etc. In case (2), from the perspective of the user terminal or the standpoint of the adjacent base station, the wireless area itself that receives or transmits signals can also be indicated as a base station.

[0037] In this specification, a cell may refer to a coverage area of ​​a signal transmitted from a transmission / reception point or a component carrier having coverage of a signal transmitted from a transmission / reception point or the transmission / reception point itself.

[0038] The uplink (UL, or uplink) refers to the method by which a terminal transmits / receives data to / from a base station, while the downlink (DL, or downlink) refers to the method by which a base station transmits / receives data to / from a terminal. A downlink can refer to communication or a communication path from multiple transmission / reception points to a terminal, while an uplink can refer to communication or a communication path from a terminal to multiple transmission / reception points. In this case, in the downlink, a transmitter can be part of multiple transmission / reception points, and a receiver can be part of a terminal. Furthermore, in the uplink, a transmitter can be part of a terminal, and a receiver can be part of multiple transmission / reception points.

[0039] The uplink and downlink transmit and receive control information via control channels such as the Physical Downlink Control Channel (PDCCH) and the Physical Uplink Control Channel (PUCCH). Data is transmitted and received via data channels such as the Physical Downlink Shared Channel (PDSCH) and the Physical Uplink Shared Channel (PUSCH). Hereinafter, the transmission and reception of signals via channels such as the PUCCH, PUSCH, PDCCH, and PDSCH will be referred to as "transmission and reception of PUCCH, PUSCH, PDCCH, and PDSCH."

[0040] For a clearer explanation, the following describes the technical concept mainly based on the 3GPP LTE / LTE-A / NR (New RAT) communication system, but the technical features are not limited to this communication system.

[0041] In 3GPP, after studying the fourth-generation mobile information system (4th-Generation, 4G) communication technology, the fifth-generation mobile information system (5th-Generation, 5G) communication technology that meets the requirements of the next-generation wireless access technology of ITU-R is being developed. Specifically, 3GPP develops new NR communication technology through 5G communication technology, which is different from LTE-A pro and 4G communication technology that improves LTE-Advanced technology in a manner that meets the requirements of ITU-R. LTE-A pro and NR both mean 5G communication technology. In the following, when no specific communication technology is specifically mentioned, 5G communication technology will be explained with NR as the center.

[0042] The operational scenarios in NR add satellite, automotive, and new vertical considerations to the existing 4G LTE scenarios, and define multiple operating scenarios. In terms of services, it supports enhanced mobile broadband (eMBB) scenarios; massive machine communication (mMTC) scenarios, which have high terminal density and are deployed over a wide area, and require low data rates and asynchronous access; ultra-reliable and low-latency communication (URLLC) scenarios, which require high responsiveness and reliability and can support high-speed mobility.

[0043] To meet these scenarios, NR discloses a wireless communication system that applies new waveform and frame structure technologies, low latency technologies, ultra-high frequency band (mmWave) support technologies, and forward compatibility technologies. In particular, in order to provide forward compatibility in the NR system, various technical changes are proposed in terms of flexibility. The following will describe the main technical features of NR with reference to the accompanying drawings.

[0044] <Normal NR system>

[0045] Figure 1 This is a diagram that simply shows the structure of the NR system applicable to this embodiment.

[0046] Reference Figure 1, the NR system is divided into 5GC (5G Core Network) and NR-RAN (New Radio - Radio Access Network) parts. The NG-RAN (Next Generation Radio Access Network) consists of gNBs and ng-eNBs that provide the user plane (SDAP (Service Data Adaptation Protocol) / PDCP (Packet Data Convergence Protocol) / RLC (Radio Link Control) / MAC (Medium Access Control) / PHY (Physical Layer)) and the control plane (RRC) protocol termination for the UE (User Equipment). gNBs are interconnected with each other or with ng-eNBs via the Xn interface. gNBs and ng-eNBs are connected to 5GC via the NG interface respectively. 5GC may include: Access and Mobility Management Function (AMF), which is responsible for the control plane such as terminal access and mobility control functions; and User Plane Function (UPF), which is responsible for user data control functions. NR supports both frequency bands below 6 GHz (FR1, Frequency Range 1) and above 6 GHz (FR2, Frequency Range 2).

[0047] gNB means a base station that provides NR user plane and control plane protocol termination for the terminal, and ng-eNB means a base station that provides E-UTRA user plane and control plane protocol termination for the terminal. The base stations described in this specification should be understood to cover the meanings of gNB and ng-eNB, and can also be used according to the meaning of differentiating gNB or ng-eNB as needed.

[0048] <Waveforms, Parameter Sets, and Frame Structures in NR>

[0049] In NR, for downlink transmission, the Cyclic prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) waveform with a cyclic prefix is used. For uplink transmission, CP-OFDM or DFT-s-OFDM (Discrete Fourier Transform - Spread Orthogonal Frequency Division Multiplexing) is used. The OFDM technology is easy to combine with Multiple Input Multiple Output (MIMO), and its advantages are high frequency efficiency and the ability to use a receiver with low complexity.

[0050] On the other hand, in NR, since the requirements for data speed, latency, and coverage vary across the three scenarios described above, it is necessary to efficiently meet the requirements of each scenario using the frequency bands that make up any NR system. To this end, a technology for efficiently multiplexing radio resources based on multiple different numerologies has been proposed.

[0051] Specifically, the NR transmission parameter set is determined based on the sub-carrier spacing and CP (Cyclic prefix), as shown in Table 1 below. Taking 15kHz as the benchmark, the μ value is used as an exponential value of 2 and changes in an exponential form.

[0052]

Table 1

[0053]

[0054] As shown in Table 1 above, NR parameter sets can be divided into five types according to the subcarrier spacing. This is different from the 4G communication technology LTE, in which the subcarrier spacing is fixed at 15kHz. Specifically, the subcarrier spacing used for data transmission in NR is 15, 30, 60 and 120kHz, and the subcarrier spacing for synchronization signal transmission is 15, 30, 12 and 240kHz. In addition, the extended CP is only applicable to 60kHz subcarrier spacing. At the same time, the frame structure in NR is defined as a frame with a length of 10ms, consisting of 10 subframes with a length of 1ms each. A frame can be divided into half frames of 5ms, and each half frame contains 5 subframes. When the subcarrier spacing is 15kHz, a subframe consists of a time slot, and each time slot consists of 14 OFDM symbols. Figure 2 This is a diagram for explaining the frame structure in the NR system to which this embodiment is applicable. Figure 2 In the case of normal CP, the time slot is fixedly composed of 14 OFDM symbols, but in the time domain of the time slot, the length can vary according to the subcarrier spacing. For example, in the case of a parameter set with a 15kHz subcarrier spacing, the length of the time slot is 1ms, which is the same as the length of the subframe. Differently, in the case of a parameter set with a 30kHz subcarrier spacing, although the time slot consists of 14 OFDM symbols, the length is 0.5ms, and two time slots can be included in one subframe. That is, subframes and frames are defined by a fixed time length, while the time slot is defined by the number of symbols, and the time length can vary according to the subcarrier spacing.

[0055] In addition, in NR, the basic unit of scheduling is defined as a time slot. To reduce the transmission delay in the wireless interval, mini-slots (or sub-slots or non-slot based scheduling) are also introduced. If a wide subcarrier spacing is used, the length of a time slot will become inversely shorter, so the transmission delay in the wireless interval can be reduced. Mini-slots (or sub-slots) are used to effectively support the URLLC scenario and can be scheduled in units of 2, 4, or 7 symbols.

[0056] In addition, different from LTE, NR defines the uplink and downlink resource allocation as the symbol level within a time slot. To reduce the HARQ (Hybrid Automatic Repeat reQuest) delay, a time slot structure in which HARQ ACK / NACK (Hybrid Automatic Repeat reQuest - Acknowledgment / Negative Acknowledgment) can be directly sent within the transmission time slot is defined, and this time slot structure is named a self-contained structure for description.

[0057] In NR, it is designed to support a total of 256 time slot formats, of which 62 time slot formats are used for 3GPP Rel-15. In addition, through various combinations of time slots, it supports the common frame structure that composes the FDD or TDD frame. For example, it supports the time slot structure where all symbols of the time slot are set as downlink, the time slot structure where all symbols are set as uplink, and the time slot structure where downlink symbols and uplink symbols are combined. In addition, NR supports scheduling data transmission scattered in more than one time slot. Therefore, the base station can use the Slot Format Indicator (SFI) to notify the terminal whether the time slot is a downlink time slot, an uplink time slot, or a flexible time slot. The base station can use the SFI indication to form a table index through UE-specific RRC signaling to indicate the time slot format, or can perform dynamic indication through Downlink Control Information (DCI) or static or quasi-static indication through RRC.

[0058] <Physical Resources in NR>

[0059] Regarding the physical resources in NR, antenna ports, resource grids, resource elements, resource blocks, bandwidth parts, etc. can be considered.

[0060] Antenna ports are defined such that the channel carrying symbols on that antenna port can be inferred from the channel carrying other symbols on the same antenna port. Two antenna ports are considered to be in a QC / QCL (quasi co-located) relationship if the large-scale properties of the channel carrying symbols on one antenna port can be inferred from the channel carrying symbols on another antenna port. Large-scale properties include one or more of the following: delay spread, Doppler spread, frequency shift, average received power, and received timing.

[0061] Figure 3 This is a diagram for explaining a resource grid supporting a radio access technology to which this embodiment is applicable.

[0062] Reference Figure 3 Resource Grid: Since NR supports multiple parameter sets in the same carrier, a resource grid can exist for each parameter set. In addition, a resource grid can exist based on the antenna port, subcarrier spacing, and transmission direction.

[0063] A resource block consists of 12 subcarriers and is defined only in the frequency domain. In addition, a resource element consists of one OFDM symbol and one subcarrier. Figure 3 As shown, the size of one resource block can vary depending on the subcarrier spacing. In addition, NR defines "Point A" which serves as a common reference point for the resource block grid, common resource blocks, virtual resource blocks, etc.

[0064] Figure 4 This is a diagram for explaining a bandwidth portion supporting a wireless access technology to which this embodiment is applicable.

[0065] In NR, unlike LTE where the carrier bandwidth is fixed at 20 MHz, the maximum carrier bandwidth for each subcarrier spacing is set to 50 MHz to 400 MHz. Therefore, it is not assumed that all terminals use these carrier bandwidths. Figure 4As shown, a bandwidth part (BWP) can be specified within the carrier bandwidth for use by a terminal. In addition, the bandwidth part is associated with a parameter set, consists of a subset of consecutive common resource blocks, and can be dynamically activated according to time. The terminal is configured to have up to 4 bandwidth parts for the uplink and downlink respectively, and transmits / receives data using the activated bandwidth part within a specified time.

[0066] In the case of a paired spectrum, the uplink and downlink bandwidth parts are set independently. In the case of an unpaired spectrum, to prevent unnecessary frequency re-tuning between downlink and uplink operations, the downlink and uplink bandwidth parts are paired and set to share the center frequency.

[0067] <NR Initial Connection>

[0068] In NR, for a terminal to access a base station and communicate, it performs a cell search and random access procedure.

[0069] Cell search is a procedure that uses the Synchronization Signal Block (SSB) transmitted by the base station to synchronize the terminal with the cell of the above base station, obtain the physical layer cell ID, and obtain system information.

[0070] Figure 5 It is a diagram示例性 showing the Synchronization Signal Block in the radio access technology applicable to this embodiment.

[0071] Refer to Figure 5 , the SSB consists of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) that respectively occupy 1 symbol and 127 subcarriers, and a Physical Broadcast Channel (PBCH) that occupies 3 OFDM symbols and 240 subcarriers.

[0072] The terminal receives the SSB by monitoring the SSB in the time and frequency domains.

[0073] SSB can be transmitted up to 64 times within 5ms. Most SSBs are transmitted using different beams within that 5ms period. If a terminal uses a specific beam for transmission as a reference, it is assumed that an SSB is transmitted and detected once every 20ms. The number of beams available for SSB transmission within 5ms increases with frequency. For example, in bands below 3GHz, up to 4 SSB beams can be transmitted, in bands between 3GHz and 6GHz, up to 8 beams can be used, and in bands above 6GHz, up to 64 different beams can be used for SSB transmission.

[0074] Two SSBs are included in one slot, and the starting symbol and the number of repetitions in the slot are determined as follows based on the subcarrier spacing.

[0075] On the other hand, unlike the existing LTE SS, SSB is not transmitted at the center frequency of the carrier bandwidth. That is, SSB can be transmitted at a place other than the center of the system frequency band, and when broadband operation is supported, multiple SSBs can be transmitted in the frequency domain. As a result, the terminal uses the synchronization raster as a candidate frequency position for monitoring SSB to monitor SSB. In NR, the carrier raster and the synchronization raster are redefined as the center frequency position of the channel for initial access, and the frequency interval of the synchronization raster is set to be wider than that of the carrier raster, so that the terminal can support fast SSB search.

[0076] The terminal can obtain the MIB (Master Information Block) through the PBCH of the SSB. The MIB (Master Information Block) includes the minimum information of the remaining minimum system information (RMSI) broadcast by the terminal for receiving the network. In addition, the PBCH may include: the position information of the first DM-RS symbol in the time domain, the information used by the terminal to monitor SIB1 (for example, SIB1 parameter set information, information related to SIB1 CORESET, search space information, and PDCCH-related parameter information, etc.), the offset information between the common resource block and the SSB (the absolute position of the SSB in the carrier is transmitted through SIB1), etc. Among them, the SIB1 parameter set information is also applicable to some messages used in the random access process for accessing the base station after the terminal completes the cell search process. For example, the parameter set information of SIB1 can be applicable to at least one of messages 1 to 4 used for the random access process.

[0077] The above-mentioned RMSI may mean SIB1 (System Information Block 1), which is broadcast periodically (for example, 160ms) in the cell. SIB1 includes the information required for the terminal to perform the initial random access procedure, and is transmitted periodically through PDSCH. In order to receive SIB1, the terminal needs to receive the parameter set information for SIB1 transmission and the control resource set (Control Resource Set, CORESET) information for SIB1 scheduling through PBCH. The terminal uses SI-RNTI in CORESET to confirm the scheduling information for SIB1, and obtains SIB1 on PDSCH according to the scheduling information. Other SIBs besides SIB1 can be transmitted periodically or according to the requirements of the terminal.

[0078] Figure 6 This is a diagram for explaining a random access procedure in a wireless access technology to which this embodiment is applicable.

[0079] Reference Figure 6 Upon completing the cell search, the terminal transmits a random access preamble (RAP) to the base station for random access. The RAP is transmitted via the PRACH. Specifically, the RAP is transmitted to the base station via the PRACH, which consists of continuous radio resources in a periodically repeated specific time slot. Typically, when a terminal initially accesses a cell, a contention-based random access procedure is performed. When performing random access for beam failure recovery (BFR), a non-contention-based random access procedure is performed.

[0080] The terminal receives a random access response to the transmitted random access preamble. The random access response may include: a random access preamble identifier (ID), an uplink grant (UL Grant) (uplink radio resources), a temporary C-RNTI (Temporary Cell-Radio Network Temporary Identifier), and a time alignment command (Time Alignment Command, TAC). Since a random access response may include random access response information for more than one terminal, a random access preamble identifier may be included to notify which terminal the included UL Grant, temporary C-RNTI, and TAC are valid for. The random access preamble identifier may be an identifier for the random access preamble received by the base station. The TAC may be included as information for the terminal to adjust uplink synchronization. The random access response may be indicated by a random access identifier on the PDCCH, i.e., a random access radio network temporary identifier (Random Access-Radio Network Temporary Identifier, RA-RNTI).

[0081] The terminal that receives a valid random access response processes the information contained in the random access response and performs a transmission scheduled to the base station. For example, the terminal applies the TAC and stores the temporary C-RNTI. Additionally, the data stored in the terminal buffer or newly generated data is transmitted to the base station using the UL Grant. In this case, information capable of identifying the terminal should be included.

[0082] Finally, the terminal receives a downlink message for contention resolution.

[0083] <CORESET in NR>

[0084] The downlink control channel in NR is transmitted by a CORESET (Control Resource Set) with a length of 1 to 3 symbols and transmits uplink / downlink scheduling information and a slot format index (Slot format Index, SFI), transmit power control (Transmit Power Control, TPC) information, etc.

[0085] As mentioned above, NR introduces the concept of a CORESET to ensure system flexibility. A CORESET (Control Resource Set) refers to the time-frequency resources (i.e., time-frequency resources) used for downlink control signals. Terminals can use more than one search space within the CORESET time-frequency resources to decode control channel candidates. A QCL (Quasi CoLocation) assumption is set for each CORESET. Its purpose is to provide characteristics for the simulated beam direction in addition to the existing QCL assumptions: delay spread, Doppler spread, Doppler shift, and average delay.

[0086] Figure 7 This is a diagram for explaining CORESET.

[0087] Reference Figure 7 ,CORESET can exist in multiple forms within the carrier bandwidth within a time slot.,In the time domain, a CORESET can consist of up to 3 OFDM symbols.,In addition, a CORESET is defined as a multiple of up to six resource blocks of the,carrier bandwidth in the frequency domain.

[0088] The first CORESET is part of the initial bandwidth component and is indicated by the MIB to receive additional configuration information and system information from the network. After establishing a connection with the base station, the terminal can receive and configure more than one CORESET information through RRC signaling.

[0089] Wider bandwidth operations

[0090] In existing LTE systems, scalable bandwidth operation is supported for any LTC component carrier (CC). This means that, depending on the frequency deployment scenario, any LTE operator can configure a bandwidth ranging from a minimum of 1.4 MHz to a maximum of 20 MHz when configuring an LTE CC. For a single LTE CC, a normal LTE terminal supports the transmit / receive capability of 20 MHz bandwidth.

[0091] However, in the case of NR, a single wideband NR CC is designed to support NR terminals with different transmit / receive bandwidth capabilities. Therefore, for any NR CC, one or more bandwidth parts (BWPs) consisting of segmented bandwidths are configured, and flexible wider bandwidth operation is supported through different bandwidth part configurations and activations for each terminal.

[0092] Specifically, in NR, one or more bandwidth parts can be composed of a serving cell configured from the perspective of the terminal, and the terminal is defined as being used for uplink and downlink data transmission / reception by activating a downlink bandwidth part (DL bandwidth part) and an uplink bandwidth part (UL bandwidth part) in the serving cell. In addition, when multiple serving cells are set in the terminal, that is, the terminal to which CA is applied is also defined as being used for uplink and downlink data transmission / reception using the radio resources of the serving cell by activating a downlink bandwidth part and / or an uplink bandwidth part for each serving cell.

[0093] Specifically, an initial bandwidth part for the initial access procedure of the terminal is defined in any serving cell, one or more terminal-specific (UE-specific) bandwidth parts (multiple bandwidth parts) are configured for each terminal through dedicated RRC signaling, and a default bandwidth part for fallback operation can also be defined for each terminal.

[0094] However, in any serving cell, multiple downlink and / or uplink bandwidth parts can be defined as being activated and used simultaneously according to the terminal's capability and bandwidth part (multiple) bandwidth part configuration, but in NR rel-15, only one downlink bandwidth part (DL bandwidth part) and one uplink bandwidth part (UL bandwidth part) are defined as being activated and used at any time in any terminal.

[0095] In this specification, frequency, frame, subframe, resource, resource block, region, frequency band, subband, control channel, data channel, synchronization signal, various reference signals, various signals, or various messages related to NR (New Radio) may be interpreted as having a meaning used in the past or present or having multiple meanings used in the future.

[0096] Hereinafter, a method for a terminal to transmit a Physical Uplink Control Channel (PUCCH) in full-duplex communication will be described in detail with reference to relevant drawings.

[0097] Figure 8 FIG8 is a diagram illustrating a process 800 of a terminal transmitting an uplink control channel according to an embodiment.

[0098] refer to Figure 8 , the terminal may receive uplink control channel configuration information S810.

[0099] Full-duplex communication is a technology in which a base station performs downlink (DL) transmission and uplink (UL) reception simultaneously on the same radio resources. The terminal side can also perform DL reception and UL transmission simultaneously. When the base station supports full-duplex communication based on sub-band non-overlapping, specific frequency resources within the same symbol in the TDD carrier are used for downlink transmission, while other frequency resources are used for uplink reception. In other words, the subband can be set to any frequency resource to support a transmission direction different from the DL, UL or flexible transmission direction set by the TDD configuration information.

[0100] That is, within a TDD carrier, part of the frequency resources in any DL time slot or DL ​​symbol can be configured for uplink transmission of the terminal, or configured as a flexible symbol for downlink / uplink transition. Alternatively, part of the frequency resources in any UL time slot or UL symbol can be configured for downlink transmission of the base station.

[0101] For example, when an uplink subband (UL subband) is set in a DL time slot, the uplink subband can be set at the center of the frequency band or at the edge of the frequency band. In this case, a guard band can be set between the uplink subband and the downlink subband (DL subband) in the time slot. Similarly, when a downlink subband is set in a UL time slot, the downlink subband can be set at the center of the frequency band or at the edge of the frequency band. In this case, the uplink subband and guard band can also be set in the frequency domain where no downlink subband is configured in the time slot.

[0102] Thus, in this disclosure, DL time slots or symbols containing uplink subbands and UL time slots or symbols containing downlink subbands are referred to as subband full-duplex (SBFD) time slots or SBFD symbols. In contrast, "downlink symbols" or "uplink symbols" herein refer to non-SBFD symbols, where no uplink or downlink subbands are assigned. However, the term SBFD is used for convenience and is not intended to limit the scope of this disclosure. Other terms may be used as needed.

[0103] The terminal can receive configuration information for up to four uplink bandwidth parts (ULBWPs) from the base station for transmitting uplink control information. In this case, one of the multiple UL BWPs is activated, and radio resources for UL transmission are allocated based on this. In other words, the terminal's UL transmission is performed using the physical resource blocks (PRBs) of the UL BWP activated for the terminal in the UL time slot or symbol (or flexible symbol) set or indicated by the base station.

[0104] The uplink control information (UCI) transmitted by the terminal through the uplink control channel may include HARQ-ACK information, scheduling request (SR), channel state information (CSI), etc. However, this is only an example, and the technical concept of the present disclosure is not limited to specific uplink control information if it can be applied in substantially the same way.

[0105] The terminal may receive uplink control channel configuration information for UCI transmission, where the UCI includes HARQ feedback information corresponding to each uplink bandwidth part set for the terminal. In other words, the terminal may receive PUCCH resource configuration information and at least one PUCCH resource set configuration information consisting of at least one PUCCH resource.

[0106] PUCCH resource configuration information may include PUCCH resource index information for each PUCCH resource, frequency hopping setting information, PUCCH format information, etc. In addition, PUCCH resource set configuration information may include PUCCH resource set index information, PUCCH resource list information consisting of a set of PUCCH resource indices constituting a PUCCH resource set, etc. A maximum of four PUCCH resource sets can be configured for one uplink bandwidth part, of which the first PUCCH resource set can contain a maximum of 32 PUCCH resources, and the remaining PUCCH resource sets can contain a maximum of eight PUCCH resources.

[0107] According to an example, when a subband full-duplex (SBFD) symbol is set for a terminal to support SBFD operation, in addition to receiving PUCCH resource configuration information and PUCCH resource set configuration information of existing uplink symbols, the terminal can also receive PUCCH resource configuration information and PUCCH resource set configuration information for UCI (such as HARQ feedback information, etc.) transmission in the SBFD symbol.

[0108] Reference again Figure 8The terminal can determine the uplink control channel resource S820 based on at least one of the uplink control channel resource indication information (PUCCH resource indicator), the control channel element (CCE) index information of the received downlink control information, and the payload size information of the uplink control information, and transmit the uplink control information S830 through the determined uplink control channel resource.

[0109] The terminal may determine the PUCCH resource for transmitting UCI (e.g., HARQ feedback information, etc.) based on the PUCCH resource configuration information and the PUCCH resource set configuration information. The terminal may determine the PUCCH resource set index and PUCCH resource index used to determine the PUCCH resource based on the payload size information of each UCI, the PUCCH resource indication information included in the DCI format, and the lowest CCE index (lowest CCE index) information for DCI transmission.

[0110] In this case, uplink control channel resources can be distinguished and determined based on whether the symbols allocated for uplink control channel transmission include SBFD symbols configured for an uplink subband used for full-duplex communication. According to one example, the case where the symbols allocated for uplink control channel transmission include SBFD symbols is equivalent to the case where all symbols used to perform uplink control channel transmission are SBFD symbols. Alternatively, according to another example, the case where the symbols allocated for uplink control channel transmission include SBFD symbols is equivalent to the case where at least one symbol among all symbols used to perform uplink control channel transmission is an SBFD symbol.

[0111] According to one example, when the symbols allocated for uplink control channel transmission include SBFD symbols, the uplink control channel resources used to transmit UCI may be determined from the uplink control channel resources included in the uplink subband in the frequency domain among the uplink control channel resources that comprise an uplink control channel resource set (PUCCH resource set). In this case, as in the past, the PUCCH resource allocation for the uplink subband in the SBFD symbols may be indicated based on the existing PUCCH resources and PUCCH resource set configured for the activated uplink bandwidth portion.

[0112] However, in this case, the PUCCH resource allocation in the SBFD symbol may be limited to performing PUCCH resource allocation only on the PUCCH resources that completely belong to the uplink subband on the frequency axis among the PUCCH resources constituting the PUCCH resource set. That is, the terminal can only determine the PUCCH resources whose all PUCCH frequency resources set according to the PUCCH resource completely belong to the uplink subband as the available (available) PUCCH resources in the SBFD symbol. Therefore, when the symbol used for UCI transmission includes an SBFD symbol, it may be limited to performing PUCCH resource allocation through the available PUCCH resource. At this time, in order to support UCI transmission such as HARQ-ACK of the uplink subband through the SBFD symbol at the terminal, the PUCCH resource set set for the terminal may include at least one or more available PUCCH resources.

[0113] According to another example, when the symbols allocated for uplink control channel transmission include SBFD symbols, the uplink control channel resources for transmitting UCI may be determined based on uplink control channel configuration information configured separately for the SBFD symbols. In other words, separate from the existing PUCCH configuration information, the terminal may also receive independent PUCCH configuration information for the SBFD symbols.

[0114] In this case, the uplink subband configuration information for the terminal may include separate PUCCH resource configuration information and PUCCH resource set configuration information for the terminal to transmit UCI through the uplink subband. For example, in order to allocate PUCCH resources for UCI transmission containing HARQ-ACK information of the terminal in the SBFD symbol, it can be defined as separate PUCCH configuration information PUCCH-configULSB. However, this is only an example, and the technical idea of ​​the present disclosure is not limited to this name. The PUCCH-configULSB can be set in a cell-specific manner, that is, in units of uplink subbands, or in a terminal-specific manner.

[0115] When PUCCH-configULSB is configured in a cell-specific manner, the PUCCH-configULSBcommon configuration information may include a reference PUCCH resource for configuring one or more PUCCH resource sets for any uplink subband, and a PUCCH resource set size, i.e., PRB number information, for configuring a PUCCH resource set based on the reference PUCCH resource. Therefore, a separate PUCCH resource table (table) for setting reference PUCCH resources for uplink subbands may be defined. In this case, the reference PUCCH resource table may include information such as the PUCCH format, first symbol, number of symbols, PRB offset, and set of initial CS (CyclicShift) indexes for each index.

[0116] In addition, the PUCCH resource table may include more than one table depending on the UCI payload size. Therefore, PUCCH-configULSBcommon may include separate PUCCH resource sets for each UCI payload size, i.e., information about the index setting for each PUCCH resource table and the number of PRBs. In addition, the PRB offset information of the table may be offset information relative to the lowest PRB of the uplink subband.

[0117] When the PUCCH-config ULSB is configured in a terminal-specific manner, the PUCCH-config ULSB may be configured according to the uplink subband configured for the terminal and based on the uplink subband. Therefore, the PUCCH-config ULSB may include PUCCH resource configuration information and PUCCH resource set configuration information based on the frequency resources of the uplink subband. In this case, the frequency resource allocation of the PUCCH resource may be based on the PRB index of the configured uplink subband. For example, the lowest PRB of the uplink subband may be set to 0, and the PRB offset value may be set accordingly. Alternatively, as before, it may be set based on the PRB index of the uplink bandwidth portion.

[0118] According to another example, when symbols allocated for uplink control channel transmission include SBFD symbols, uplink control channel resources used to transmit UCI may be determined based on uplink control channel resource set configuration information configured separately for the SBFD symbols. That is, in addition to including PUCCH resource configuration information or PUCCH resource set configuration information applicable to existing uplink symbols, existing PUCCH configuration information may also include separate PUCCH resource set configuration information for uplink subbands applicable to SBFD symbols.

[0119] In this case, the PUCCH-config configuration information for the uplink bandwidth portion including the uplink subband may include existing PUCCH resource set configuration information for uplink symbols that do not include the uplink subband, and separate PUCCH resource set configuration information for SBFD symbols. In other words, in addition to including PUCCH resource set configuration information applicable to existing uplink symbols, the existing PUCCH configuration information may also include separate PUCCH resource set configuration information applicable to uplink subbands for SBFD symbols.

[0120] In this case, the PUCCH resource configuration information included in the PUCCH-config can be applied to both the existing PUCCH resource set configuration for uplink symbols and the new PUCCH resource set configuration for SBFD symbols. In this case, the PUCCH resource set configuration for SBFD symbols can be configured based on the PUCCH resources available in the SBFD symbols among the PUCCH resources included in the PUCCH-config. That is, as described above, only PUCCH resources whose frequency resources completely belong to the uplink subband can be included in the PUCCH resource set for the SBFD symbol.

[0121] According to another example, when the symbols allocated for uplink control channel transmission include SBFD symbols, the uplink control channel resources used to transmit UCI can be determined based on uplink control channel resource configuration information set separately for the SBFD symbols and uplink control channel resource set configuration information set based on the separately set uplink control channel resource configuration information. In other words, the existing PUCCH configuration information may include PUCCH resource set configuration information for uplink symbols and separate PUCCH resource set configuration information for SBFD symbols. In addition, the existing PUCCH configuration information may also include PUCCH resource configuration information for uplink symbols and separate PUCCH resource configuration information for SBFD symbols.

[0122] Therefore, PUCCH resource allocation for SBFD symbols can be performed based on the PUCCH resource set configured for the SBFD symbol or on individual PUCCH resources also configured for the SBFD symbol. Furthermore, in this case, the frequency resource allocation included in the individual PUCCH resource configuration information can be based on the PRB index of the configured uplink subband. For example, the lowest PRB of the uplink subband can be set to 0, and the PRB offset value can be set accordingly. Alternatively, as before, it can be set based on the PRB index of the uplink bandwidth portion.

[0123] In order to determine the PUCCH resources used for UCI transmission, when interpreting the PUCCH resource allocation information of the base station, the terminal can determine whether to interpret the PUCCH resource allocation as being based on the existing PUCCH resource setting, or to interpret the PUCCH resource allocation as being based on a separate PUCCH resource setting for SBFD symbols, based on the symbol type indicating UCI transmission.

[0124] According to one example, only when all symbols used for uplink control channel transmission are SBFD symbols, the terminal interprets the PUCCH resource allocation as being for SBFD symbols. Alternatively, when at least one of all symbols used for uplink control channel transmission is a SBFD symbol, the terminal interprets the PUCCH resource allocation as being for SBFD symbols.

[0125] In contrast, the terminal can interpret PUCCH resource allocation according to indication information received through physical layer control signaling (L1 control signaling) from the base station.

[0126] The terminal may transmit UCI to the base station using the determined uplink control channel resources.

[0127] Accordingly, a method and apparatus for efficiently transmitting and receiving an uplink control channel in a time slot or symbol suitable for full-duplex communication can be provided.

[0128] Figure 9 900 is a diagram illustrating a process of receiving an uplink control channel by a base station according to an embodiment. Figure 8 In the above description, in this case, as long as it does not contradict the technical idea of ​​the present invention, the omitted content can be applied to the sending terminal in essentially the same manner.

[0129] refer to Figure 9 , the base station may transmit uplink control channel configuration information S910.

[0130] The base station can transmit configuration information of up to four uplink bandwidth parts (ULBWPs) to the terminal for transmitting uplink control information. In this case, one of the multiple UL BWPs is activated, and radio resources for UL transmission are allocated based on this. In other words, the terminal's UL transmission is performed using the physical resource blocks (PRBs) of the UL BWP activated for the terminal in the UL time slot or symbol (or flexible symbol) set or indicated by the base station.

[0131] The uplink control information (UCI) received by the base station through the uplink control channel may include HARQ-ACK information, scheduling request (SR), channel state information (CSI), etc.

[0132] The base station may transmit uplink control channel configuration information for UCI reception, where the UCI includes HARQ feedback information corresponding to each uplink bandwidth portion set for the terminal. In other words, the base station may transmit PUCCH resource configuration information and configuration information of at least one PUCCH resource set consisting of at least one PUCCH resource to the terminal.

[0133] PUCCH resource configuration information may include PUCCH resource index information for each PUCCH resource, frequency hopping setting information, PUCCH format information, etc. In addition, PUCCH resource set configuration information may include PUCCH resource set index information, PUCCH resource list information consisting of a set of PUCCH resource indices constituting a PUCCH resource set, etc. A maximum of four PUCCH resource sets may be configured for one uplink bandwidth part, of which the first PUCCH resource set may contain a maximum of 32 PUCCH resources, and the remaining PUCCH resource sets may contain a maximum of eight PUCCH resources.

[0134] According to an example, when a subband full-duplex (SBFD) symbol is set for a terminal to support SBFD operation, in addition to transmitting PUCCH resource configuration information and PUCCH resource set configuration information of existing uplink symbols, the base station can also transmit PUCCH resource configuration information and PUCCH resource set configuration information for UCI (such as HARQ feedback information, etc.) transmission in the SBFD symbol.

[0135] Reference again Figure 9The base station can receive uplink control information S920 by determining the uplink control channel resources based on at least one of the uplink control channel resource indication information (PUCCHresource indicator), the control channel element (CCE) index information of the transmitted downlink control information, and the payload size information of the uplink control information.

[0136] The terminal may determine the PUCCH resource for transmitting UCI (e.g., HARQ feedback information, etc.) based on the PUCCH resource configuration information and the PUCCH resource set configuration information. The terminal may determine the PUCCH resource set index and PUCCH resource index used to determine the PUCCH resource based on the payload size information of each UCI, the PUCCH resource indication information included in the DCI format, and the lowest CCE index (lowest CCE index) information for DCI transmission.

[0137] In this case, uplink control channel resources can be distinguished and determined based on whether the symbols allocated for uplink control channel reception include SBFD symbols configured for an uplink subband for full-duplex communication. According to one example, the case where the symbols allocated for uplink control channel reception include SBFD symbols is equivalent to the case where all symbols used to perform uplink control channel reception are SBFD symbols. Alternatively, according to another example, the case where the symbols allocated for uplink control channel reception include SBFD symbols is equivalent to the case where at least one symbol among all symbols used to perform uplink control channel reception is an SBFD symbol.

[0138] According to one example, when symbols allocated for uplink control channel reception include SBFD symbols, uplink control channel resources used to receive UCI may be determined from uplink control channel resources included in uplink subbands in the frequency domain among uplink control channel resources comprising an uplink control channel resource set (PUCCH resource set). In this case, as in the past, PUCCH resource allocation for uplink subbands in SBFD symbols may be indicated based on existing PUCCH resources and PUCCH resource sets set for the activated uplink bandwidth portion.

[0139] However, in this case, the PUCCH resource allocation in the SBFD symbol may be limited to performing PUCCH resource allocation only on the PUCCH resources that completely belong to the uplink subband on the frequency axis among the PUCCH resources constituting the PUCCH resource set. That is, the terminal can only determine the PUCCH resources whose all PUCCH frequency resources set according to the PUCCH resource completely belong to the uplink subband as the available (available) PUCCH resources in the SBFD symbol. Therefore, when the symbol used for UCI reception includes an SBFD symbol, it may be limited to performing PUCCH resource allocation through the available PUCCH resource. At this time, in order to support UCI transmission such as HARQ-ACK of the uplink subband through the SBFD symbol at the terminal, the PUCCH resource set set for the terminal may include at least one or more available PUCCH resources.

[0140] According to another example, when the symbols allocated for uplink control channel reception include SBFD symbols, the uplink control channel resources for receiving UCI may be determined based on uplink control channel configuration information configured separately for the SBFD symbols. That is, in addition to existing PUCCH configuration information, the base station may also transmit independent PUCCH configuration information for SBFD symbols.

[0141] In this case, the uplink subband configuration information for the terminal may include separate PUCCH resource configuration information and PUCCH resource set configuration information for the terminal to transmit UCI through the uplink subband. For example, in order to allocate PUCCH resources for UCI transmission containing HARQ-ACK information of the terminal in the SBFD symbol, separate PUCCH configuration information PUCCH-configULSB may be defined. The PUCCH-configULSB can be set in a cell-specific manner, i.e., in units of uplink subbands, or in a terminal-specific manner.

[0142] When PUCCH-configULSB is configured in a cell-specific manner, the PUCCH-configULSBcommon configuration information may include a reference PUCCH resource for configuring one or more PUCCH resource sets for any uplink subband, and a PUCCH resource set size, i.e., PRB number information, for configuring a PUCCH resource set based on the reference PUCCH resource. Therefore, a separate PUCCH resource table (table) for setting reference PUCCH resources for uplink subbands may be defined. In this case, the reference PUCCH resource table may include information such as the PUCCH format, first symbol, number of symbols, PRB offset, and set of initial CS (CyclicShift) indexes for each index.

[0143] Furthermore, the PUCCH resource table may contain more than one table depending on the UCI payload size. Therefore, PUCCH-configULSBcommon may contain separate PUCCH resource sets per UCI payload size, i.e., information about the index setting for each PUCCH resource table and the number of PRBs. Furthermore, the PRB offset information for the table may be offset information relative to the lowest PRB of the uplink subband.

[0144] When the PUCCH-configULSB is configured in a terminal-specific manner, the PUCCH-configULSB can be configured according to the uplink subband set for the terminal and based on the uplink subband. Therefore, the PUCCH-configULSB can include PUCCH resource configuration information and PUCCH resource set configuration information based on the frequency resources of the uplink subband. In this case, the frequency resource allocation of the PUCCH resource can be based on the PRB index of the configured uplink subband. For example, the lowest PRB of the uplink subband can be set to 0, and the PRB offset value can be set accordingly. Alternatively, as in the past, it can be set based on the PRB index of the uplink bandwidth part.

[0145] According to yet another example, when symbols allocated for uplink control channel reception include SBFD symbols, uplink control channel resources used to receive UCI may be determined based on uplink control channel resource set configuration information configured separately for the SBFD symbols. That is, in addition to including PUCCH resource configuration information or PUCCH resource set configuration information applicable to existing uplink symbols, existing PUCCH configuration information may also include separate PUCCH resource set configuration information for uplink subbands applicable to SBFD symbols.

[0146] In this case, the PUCCH-config configuration information for the uplink bandwidth portion including the uplink subband may include existing PUCCH resource set configuration information for uplink symbols that do not include the uplink subband, and separate PUCCH resource set configuration information for SBFD symbols. In other words, in addition to including PUCCH resource set configuration information applicable to existing uplink symbols, the existing PUCCH configuration information may also include separate PUCCH resource set configuration information applicable to uplink subbands for SBFD symbols.

[0147] In this case, the PUCCH resource configuration information included in the PUCCH-config can be applied to both the existing PUCCH resource set configuration for uplink symbols and the new PUCCH resource set configuration for SBFD symbols. In this case, the PUCCH resource set configuration for SBFD symbols can be configured based on the PUCCH resources available in the SBFD symbols among the PUCCH resources included in the PUCCH-config. That is, as described above, only PUCCH resources whose frequency resources completely belong to the uplink subband can be included in the PUCCH resource set for the SBFD symbol.

[0148] According to another example, when the symbols allocated for uplink control channel reception include SBFD symbols, the uplink control channel resources used to receive UCI can be determined based on uplink control channel resource configuration information set separately for the SBFD symbols and uplink control channel resource set configuration information set based on the separately set uplink control channel resource configuration information. That is, the existing PUCCH configuration information may include PUCCH resource set configuration information for uplink symbols and separate PUCCH resource set configuration information for SBFD symbols. In addition, the existing PUCCH configuration information may also include PUCCH resource configuration information for uplink symbols and separate PUCCH resource configuration information for SBFD symbols.

[0149] Therefore, PUCCH resource allocation for SBFD symbols can be performed based on the PUCCH resource set configured for the SBFD symbol or on individual PUCCH resources also configured for the SBFD symbol. Furthermore, in this case, the frequency resource allocation included in the individual PUCCH resource configuration information can be based on the PRB index of the configured uplink subband. For example, the lowest PRB of the uplink subband can be set to 0, and the PRB offset value can be set accordingly. Alternatively, as before, it can be set based on the PRB index of the uplink bandwidth portion.

[0150] In order to determine the PUCCH resources used for UCI transmission, when interpreting the PUCCH resource allocation information of the base station, the terminal can determine whether to interpret the PUCCH resource allocation as being based on the existing PUCCH resource setting, or to interpret the PUCCH resource allocation as being based on a separate PUCCH resource setting for SBFD symbols, based on the symbol type indicating UCI transmission.

[0151] According to one example, only when all symbols used for uplink control channel transmission are SBFD symbols, the terminal interprets the PUCCH resource allocation as being for SBFD symbols. Alternatively, when at least one of all symbols used for uplink control channel transmission is a SBFD symbol, the terminal interprets the PUCCH resource allocation as being for SBFD symbols.

[0152] Different from this, the base station may transmit indication information for explaining the PUCCH resource allocation of the terminal via physical layer control signaling (L1 control signaling).

[0153] The base station may receive UCI from the terminal using the determined uplink control channel resources.

[0154] Accordingly, a method and apparatus for efficiently transmitting and receiving an uplink control channel in a time slot or symbol suitable for full-duplex communication can be provided.

[0155] Hereinafter, with reference to the relevant drawings, a method for transmitting and receiving an uplink control channel in full-duplex communication and various related embodiments will be described in detail.

[0156] This disclosure proposes a method for allocating resources for an uplink control channel (PUCCH) for transmission of uplink control information to a terminal at any base station or cell, wherein the base station or cell is configured with an uplink subband (UL subband) or downlink subband (DL subband) for supporting full-duplex communication in a wireless mobile communication system. In particular, a method for allocating PUCCH resources for transmitting uplink control information via the UL subband is proposed.

[0157] Time Division Duplex (TDD) is a duplexing method widely used in commercial NR (New Radio), i.e., 5G mobile communication systems. In TDD, time period radio resources are divided into downlink time slots and uplink time slots for use. Typically, downlink time slots are distributed more frequently than uplink time slots, based on the distribution ratio of uplink traffic to downlink traffic. However, this limitation of uplink time slots has a negative impact on coverage and latency. Full-duplex communication can be applied as a technology to solve the above problems.

[0158] Full-duplex communication is a technology that uses the same time and frequency resources to transmit and receive simultaneously. It is a method that is applicable in the form of simultaneous DL transmission and UL reception on the base station side. The terminal side can also perform DL reception and UL transmission simultaneously. That is, both the base station and the terminal can support full duplex. However, unlike the base station, which is structurally convenient for self-interference cancellation, the DL reception performance of the terminal is easily affected by the self-interference of the UL transmission signal. Therefore, it is generally considered that the base station is operated by full-duplex communication and the terminal is operated by half-duplex communication. In addition, in order to reduce the impact of self-interference, DL transmission and UL reception are also performed simultaneously at the base station, but the subband non-overlapping full duplex communication method is mainly considered to distinguish frequency resources that are not the same resources between DL / UL and transmit and receive.

[0159] That is to say, in Figure 10 and Figure 11 , an example is shown in which DL time slots and UL time slots in any NR frequency band are composed in a ratio of 4:1. However, part of the symbols of the last DL time slot may be a special time slot containing flexible symbols for DL / UL transition. As described above, when a TDD (Time Division Duplex) configuration is formed, an uplink subband (UL subband) for supporting UL transmission of a terminal may be set in part (or all) of the DL time slots in the DL time slot. When a UL subband is set in any DL time slot, as shown in FIG. Figure 10 As shown, the UL subband can be set at the center of the frequency band, or as shown in Figure 11 As shown, it can be set at the edge of the frequency band. In this case, a guard band can be set between the UL subband and the downlink subband (DL subband) in the time slot.

[0160] The content described in the present disclosure can be substantially the same and applied to various other full-duplex application scenarios. For example, the full-duplex application scenario may include full-duplex operation in an unpaired spectrum and full-duplex operation in a downlink (DL) band or uplink (UL) band of a paired spectrum. In addition, only sub-band non-overlapping full-duplex or pure full-duplex (i.e., performing DL transmission and UL reception simultaneously on the same frequency resource) is supported on the base station side, and in the terminal, the content of the present disclosure can also be substantially the same and applied to scenarios where half-duplex operation is performed. In addition, not only in the base station, but also in the terminal, when sub-band non-overlapping full-duplex or pure full-duplex is supported, the content of the present disclosure can also be substantially the same and applied.

[0161] The uplink-downlink (UL-DL) slot setting defined in NR is defined as being formed by cell units through cell-specific RRC signaling. That is, a pattern of DL symbols, UL symbols and flexible symbols of a certain period is set by the RRC message "tdd-UL-DL-ConfigurationCommon" used for the UL-DL slot configuration. In addition, through "tdd-UL-DL-ConfigurationDedicated" as terminal-specific (UE-specific) RRC signaling, only the flexible symbols set by the above-mentioned "tdd-UL-DL-ConfigurationCommon" can be reallocated as UL symbols, DL symbols or flexible symbols for each terminal. Alternatively, a method for indicating a dynamic slot format through a UE-group common PDCCH is also defined. For this reason, a slot format indication method in a dynamic form through DCI format 2_0 is also supported in NR.

[0162] According to the above slot configuration method, any symbol can be set or indicated as one of DL, UL or flexible. Figure 10 This is an example of setting an arbitrary time slot format to DDDSU through the existing slot configuration. D is a downlink time slot, which means that all OFDM symbols constituting the time slot are set to DL. U is an uplink time slot, which means that all OFDM symbols constituting the time slot are set to UL. S is a special time slot, which refers to a time slot including flexible symbols for DL / UL transition. Typically, in the case of a normal CP, the special time slot can consist of 12 DL symbols and 2 flexible symbols out of a total of 14 symbols. Alternatively, it can consist of 10 DL symbols, 2 flexible symbols and 2 UL symbols. That is, within any TDD carrier, a symbol is set or indicated as only one of DL or UL or flexible.

[0163] However, if Figure 10 and Figure 11 As shown, when a UL subband is set in any DL time slot, DL transmission or UL transmission can occur simultaneously on each frequency resource in that symbol. As described above, a DL time slot or symbol including a UL subband and a UL time slot or symbol including a DL subband are referred to as subband full duplex (SBFD) time slots or SBFD symbols in this disclosure.

[0164] In the NR system, according to the uplink transmission method of the terminal, the base station can set up to 4 uplink bandwidth parts (UL BWP) for the uplink transmission of the terminal. In this case, one of the multiple UL BWPs is activated, and the radio resource allocation for UL transmission is performed based on this. That is, the UL transmission of the terminal is performed in the UL time slot or symbol (or flexible symbol) set or indicated by the base station through the physical resource block (PRB) resources of the ULBWP activated for the terminal.

[0165] The terminal can transmit uplink control information (UCI) through PUCCH. The types of UCI transmitted by the terminal through PUCCH include HARQ-ACK information, scheduling request (SR), channel state information (CSI), etc. The PUCCH resources used for UCI transmission of the terminal are also based on the UL BWP. That is, when the base station sets the UL BWP for any terminal, it will include PUCCH resource allocation information about the UL BWP. The PUCCH resource allocation information includes PUCCH resource index information for each PUCCH resource, frequency hopping setting information, starting PRB information (i.e., frequency resource allocation information before frequency hopping or when frequency hopping is not set), secondHopPRB information for frequency hopping, PUCCH format information, etc. In addition, the PUCCH resource setting information in the shared spectrum may include PRB interlace setting information for PUCCH transmission.

[0166] The PUCCH resource set for any UL BWP can be set together with the setting of the above-mentioned PUCCH resource allocation information. Each PUCCH resource set setting information includes: the PUCCH resource set index information, the PUCCH resource list information consisting of the set of the above-mentioned PUCCH resource indices constituting the PUCCH resource set, and the maximum payload size information of the PUCCH resource set. Up to four PUCCH resource sets can be set for any UL BWP, of which the first PUCCH resource set can contain up to 32 PUCCH resources, and the remaining PUCCH resource sets can contain up to 8 PUCCH resources.

[0167] As above Figure 10 and Figure 11As shown, the terminal can perform uplink transmission through the UL subband of the SBFD symbol. At this time, due to the difference between the bandwidth of the UL subband and the bandwidth of the UL BWP activated for the uplink transmission of the terminal, problems may arise when allocating PUCCH resources of the UL subband according to the PUCCH resources set based on the UL BWP. That is, the PUCCH resources according to the PUCCH-config information set in units of UL BWP may not be included in the frequency band of the UL subband. In this case, if the PUCCH resource allocation within the UL subband is based on the PUCCH-config information of the UL BWP unit, it is necessary to define a method for the terminal to reinterpret it, or to define a separate PUCCH resource allocation method for the UL subband.

[0168] Therefore, the present disclosure proposes a method for allocating PUCCH resources for a UL subband of an SBFD symbol.

[0169] Example 1, Implicit Configuration Method

[0170] As described above, when PUCCH resource allocation is performed based on the PUCCH-config information of the existing UL BWP unit, a method for reinterpreting it as a UL subband PUCCH resource can be defined. In other words, it can be defined that the PUCCH configuration for UL subband PUCCH resource allocation is performed implicitly.

[0171] As a method for implicit PUCCH resource configuration for UL subbands, available PUCCH resources can be defined for PUCCH resource allocation within the UL subband within the PUCCH resource configuration in UL BWP units, thereby limiting PUCCH resource allocation through the UL subband to only those available PUCCH resources. In this case, as in the past, PUCCH transmission resource allocation through the UL subband is performed based on the PUCCH configuration information configured for each existing UL BWP, without the need to configure PUCCH resources separately for the UL subband at the base station. Specifically, it can be defined as follows: at any terminal, PUCCH resource allocation through the UL subband is performed based on the PUCCH resources and PUCCH resource set configured for the UL BWP activated for UL transmission through the UL subband (i.e., the UL BWP including the UL subband).

[0172] However, when performing PUCCH transmission via the UL subband, it is possible to define the following: among the PUCCH resources configured for the UL BWP, only PUCCH resources whose frequency resources completely belong to the UL subband are allocated as PUCCH transmission resources for the UL subband of the SBFD symbol. In other words, when any terminal is configured or instructed by the base station to transmit UCI via the UL subband of the SBFD symbol, and this UCI transmission is configured or instructed to be performed via PUCCH, the PUCCH resource configuration or indication information used for this UCI transmission can be defined based on the PUCCH resources and PUCCH resource sets configured based on the activated UL BWP that includes the UL subband.

[0173] However, in this case, the frequency resources of the PUCCH resources additionally set or indicated by the base station can also be limited to the frequency band of the UL subband. That is, when the terminal transmits UCI through the UL subband, only the PUCCH resources of the activated UL BWP that completely belong to the frequency band of the UL subband can be expected to be allocated by the base station. Therefore, when the PUCCH resources set or indicated by the base station do not completely belong to the UL subband, the terminal can be defined to abandon (drop) the UCI transmission, or to define the transmission through the first subsequent UL time slot or symbol. In addition, in this case, when there is no PUCCH resource that completely belongs to the UL subband among the PUCCH resources set for any UL BWP activated for the terminal, it can be defined that the terminal does not expect PUCCH transmission of the UL subband through the SBFD symbol. That is, UCI transmission through the UL subband can be restricted to be performed only through the PUSCH.

[0174] As another method for implicitly defining PUCCH resources for UCI transmission via a UL subband, a rule can be defined for mapping PUCCH resources configured based on the UL BWP to PUCCH resources within the UL subband. That is, each PUCCH resource configured for the UL BWP (i.e., the PUCCH resource corresponding to each PUCCH resource index) can be mapped 1:1 to a PUCCH resource within the UL subband. Therefore, a formula can be defined for converting the PUCCH resources of the UL BWP to the PUCCH resources of the UL subband. In this case, the mapping from the PUCCH resources of the UL BWP to the PUCCH resources of the UL subband can be a frequency resource mapping. That is, a formula can be defined to convert only the frequency resource allocation of the PUCCH resources configured based on the UL BWP to the frequency resources within the UL subband.

[0175] In this case, the PUCCH resources of all indices of all UL BWPs can be limited to the objects of the frequency resource mapping, or only part of the PUCCH resources among all PUCCH resources can be the objects of the frequency resource mapping. At this time, when the frequency resource mapping is limited to part of the PUCCH resources, the PUCCH resources that are the objects of the frequency resource mapping can be limited to PUCCH resources that do not completely belong to the UL subband, that is, partially or completely overlap with the guardband or DL ​​subband on the frequency axis. The parameters for mapping the PUCCH resources set based on the UL BWP to the PUCCH resources for the UL subband can be determined by the following information: the frequency allocation information of the UL BWP (that is, the frequency position and bandwidth information of the UL BWP), the PRB allocation information of the PUCCH resources based on the UL BWP, and the frequency allocation information of the UL subband (that is, the frequency position and bandwidth information of the UL subband).

[0176] Example 2, Explicit Configuration Method

[0177] When configuring a UL BWP for any terminal, if the UL BWP includes a UL subband, it may be defined to include PUCCH-config information configured for existing UL time slots or symbols and PUCCH resources / PUCCH resource sets configured accordingly, as well as PUCCH-config information for a UL subband configured for a separate SFBD symbol and PUCCH resources / PUCCH resource sets configured accordingly. That is, a special UL BWP including a UL subband may be separately defined (alternatively, the existing UL BWP configuration may be followed without separate definition; however, when the UL BWP includes a UL subband, it will be referred to as a special UL BWP for convenience of description). The special UL BWP may be defined to separately configure and include: PUCCH-config information based on the entire frequency resource information configuring the special UL BWP for UL time slots or symbols; and PUCCH-config information based on the frequency resource information of the UL subbands included in the special UL BWP. That is, the special UL BWP includes: PUCCH-config information for setting or indicating PUCCH resources in UL time slots / symbols for the entire frequency band of the BWP and PUCCH resource / PUCCH resource set configuration information based thereon; and PUCCH-config information for setting or indicating PUCCH resources in SBFD time slots / symbols for the UL subband and PUCCH resource / PUCCH resource set configuration information based thereon. In other words, it can be distinguished into PUCCH-config-UL for UL time slots / symbols and PUCCH-config-SBFD for SBFD time slots / symbols. (However, this is only an example and the present invention is not limited to this name.)

[0178] Alternatively, it can be defined as only for the PUCCH resource setting information or PUCCH resource set setting information included in the PUCCH-config set for the UL BWP, distinguishing between PUCCH resource setting information or PUCCH resource set setting information for the entire frequency band of the UL BWP of the existing UL time slot / symbol, and PUCCH resource setting information or PUCCH resource set setting information for the UL subband of the SBFD time slot / symbol. In other words, it can be defined as including: existing PUCCH resource setting information or PUCCH resource set setting information; and PUCCH resource setting information or PUCCH resource set setting information used solely for the UL subband. That is, it can be distinguished as PUCCH-resource-UL or PUCCH-resourceset-UL, and PUCCH-resource-SBFD or PUCCH-resourceset-SBFD. (However, this is only an example, and the present invention is not limited to this name).

[0179] Alternatively, when performing any PUCCH resource setting or PUCCH resource set setting, it can be defined as including a parameter to indicate whether the PUCCH resource or PUCCH resource set is a PUCCH resource or PUCCH resource set based on the entire ULBWP frequency band of the UL time slot / symbol, or a PUCCH resource or PUCCH resource set based on the UL sub-band frequency band of the SBFD time slot / symbol.

[0180] As described above, in the case where the PUCCH resource setting for the UL subband of the SBFD symbol is performed separately, when the terminal interprets the PUCCH resource allocation information of the base station, if the base station sets / instructs that the PUCCH resource transmission is performed through the SBFD symbol, then the PUCCH-config-SBFD information based on the SBFD symbol, or PUCCH-resource-SBFD, PUCCH-resourceset-SBFD information, or PUCCH-resource / PUCCH-resourceset indicated by an indication parameter as a resource or resource set for the UL subband of the SBFD symbol / time slot can be defined to interpret the PUCCH resource allocation information.

[0181] In addition, the special UL BWP (special ULBWP) containing separate PUCCH configuration information for the UL subband is a dedicated BWP set for each terminal and can be set for each terminal through UE-specific RRC signaling. Alternatively, the special UL BWP can be set as a common BWP for a specific terminal group or cell unit through UE-group common or cell-specific RRC signaling.

[0182] As another method of explicitly setting the PUCCH for the UL subband, the PUCCH setting for the UL subband can be defined to be performed in a UL subband-specific manner or based on the DLBWP containing the UL subband. That is, when the base station sets the UL subband, regardless of the UL BWP setting information of each terminal and the PUCCH-config information based thereon, it can be defined as setting a separate UL subband-specific PUCCH-config information for PUCCH transmission resource allocation through the UL subband and transmitting it to each terminal. Alternatively, a special DL BWP containing the UL subband can be defined, and the special DL BWP setting information can be defined to contain the PUCCH-config information for the UL subband. When a UL subband-specific PUCCH-config is set, the UL subband-specific PUCCH-config information may be included in the UL subband setting information and transmitted through UE-specific RRC signaling, or transmitted through UE-group common signaling or cell-specific RRC signaling. Alternatively, the UL subband-specific PUCCH-config information may be transmitted through separate UE-specific RRC signaling, or transmitted through UE-group common signaling or cell-specific RRC signaling.

[0183] In addition, when the base station sets the UL subband, it can be set whether the UL subband supports PUCCH transmission. In this case, the terminal applies the above-mentioned PUCCH resource allocation method only for the case where the base station is set to support PUCCH transmission through any UL subband, and transmits UCI through the PUCCH resources of the UL subband. However, whether the PUCCH transmission is supported can be set separately according to whether PUCCH repetition is set, or it can be defined as supporting PUCCH transmission through the UL subband only when PUCCH repetition is set. At this time, the PUCCH transmission support setting can be transmitted to the terminal through UE-specific or cell-specific RRC signaling or UE-group common RRC signaling.

[0184] The following describes specific operations of PUCCH transmission of the terminal based on the above solution.

[0185] Any terminal receives PUCCH resource setting information for UCI transmission and one or more PUCCH resource set setting information consisting of one or more PUCCH resources. The UCI includes the HARQ-ACK information of the terminal corresponding to the initial UL BWP and dedicated UL BWP set for the terminal according to the above scheme.

[0186] The terminal determines the PUCCH resource for transmitting UCI containing any HARQ-ACK information based on the PUCCH resource configuration information and PUCCH resource set configuration information. The terminal determines the PUCCH resource set and PUCCH resource index for determining the PUCCH resource based on the payload size of each UCI, the PUCCH resource indicator information included in the DCI format, and the lowest CCE index for the DCI transmission.

[0187] When the above-mentioned terminal is set with a UL subband for supporting SBFD operation and an SBFD time slot or SBFD symbol based thereon, in addition to receiving the above-mentioned PUCCH resource setting information set according to each UL BWP for transmitting UCI containing HARQ-ACK information in the existing UL symbol, the terminal can also receive separate PUCCH resource setting information for transmitting UCI containing HARQ-ACK information in the SBFD symbol.

[0188] As an example of PUCCH resource configuration for UCI transmission including HARQ-ACK information in the SBFD symbol, the PUCCH resource configuration in the SBFD symbol may be performed in an implicit method.

[0189] As an implicit setting method, as in the past, the PUCCH resource allocation of the UL subband through the SBFD symbol can be indicated based on the existing PUCCH resources and PUCCH resource sets set for the activated UL BWP. However, in this case, the PUCCH resource allocation in the SBFD symbol may be limited to only performing PUCCH resource allocation on the PUCCH resources that completely belong to the UL subband on the frequency axis among the PUCCH resources constituting the PUCCH resource set. That is, only the PUCCH resources that completely belong to the UL subband according to all PUCCH frequency resources set according to any PUCCH resource are determined as available PUCCH resources in the SBFD symbol. When any UCI transmission includes SBFD symbols, it may be limited to performing PUCCH resource allocation through the available PUCCH resources. At this time, in order to support UCI transmission including HARQ-ACK in the UL subband through the SBFD symbol at any terminal, any PUCCH resource set set for the terminal may include at least one or more available PUCCH resources.

[0190] As another method, the UL subband setting information for any terminal may include separate PUCCH resource setting information and PUCCH resource set configuration information for UCI transmission of the terminal through the UL subband. As an example, in order to allocate PUCCH resources for UCI transmission containing HARQ-ACK information of the terminal in the SBFD symbol, PUCCH-configULSB as separate PUCCH setting information may be defined (but this is only an example and the present invention is not limited to this name). The PUCCH-configULSB can be set in a cell-specific manner (i.e., set in units of UL subbands) or in a UE-specific manner.

[0191] As an example of a cell-specific setting method, the PUCCH-configULSBcommon setting information may include a reference PUCCH resource for configuring one or more PUCCH resource sets for any UL subband, and a PUCCH resource set size (resource set size), i.e., PRB number information, for configuring the PUCCH resource set based on the reference PUCCH resource. Therefore, a separate PUCCH resource table (PUCCH resource table) for setting reference PUCCH resources based on the UL subband may be defined. In addition, the reference PUCCH resource table may include information such as the PUCCH format, first symbol, number of symbols, PRB offset, and set of initial CS indexes for each index.

[0192] Furthermore, the PUCCH resource table for the UL subband can define more than one table based on the UCI payload size. Therefore, PUCCH-configULSBcommon can include separate PUCCH resource sets for each UCI payload size, i.e., information about each PUCCH resource table index and the number of PRBs. Furthermore, the PRB offset information in the above table can be offset information relative to the lowest PRB of the UL subband.

[0193] When PUCCH-config ULSB is configured in a UE-specific manner, any PUCCH-config ULSB can be set according to the UL subband set for any terminal, and the PUCCH-config ULSB setting can be performed based on the UL subband, similar to the PUCCH-config set according to the existing UL BWP. Therefore, PUCCH-config ULSB can include PUCCH resource setting related information and PUCCH resource set (PUCCH resource set) setting information based on the frequency resources of the UL subband. In this case, the frequency resource allocation of the PUCCH resource (i.e., starting PRB and secondHop PRB allocation) can be based on the PRB index (index) of the configured UL subband. For example, the lowest PRB of the UL subband can be set to 0, and the PRB offset (PRB offset) value can be set accordingly. Alternatively, as before, it can be set based on the PRB index (PRB index) of the UL BWP.

[0194] Alternatively, when the PUCCH resources and PUCCH resource sets are configured using the PUCCH-configcommon or PUCCH-config message, which is the existing PUCCH configuration information, it may be defined so that, in addition to including PUCCH resource configuration information or PUCCH resource set configuration information applicable to existing UL symbols, separate PUCCH resource configuration information or PUCCH resource set configuration information applicable to SBFD symbols may also be included. For example, PUCCH-config configuration information targeting a UL BWP including a UL subband may include existing PUCCH resource set configuration information for UL symbols not including a UL subband, as well as separate PUCCH resource set configuration information for SBFD symbols.

[0195] At this time, the PUCCH resource setting information included in the PUCCH-config can be commonly applied to the existing PUCCH resource set setting for UL symbols and the new PUCCH resource set setting for SBFD symbols. In this case, the PUCCH resource set setting for SBFD symbols can be set based on the available PUCCH resources in the SBFD symbols among the PUCCH resources included in the PUCCH-config. That is, as described above, only PUCCH resources whose frequency resources completely belong to the uplink subband can be included in the PUCCH resource set for the SBFD symbol.

[0196] Alternatively, any PUCCH-config setting information may include a PUCCH resource set setting for UL symbols and a separate PUCCH resource set setting information for SBFD symbols, and may also include PUCCH resource setting information for the above-mentioned UL symbols and a separate PUCCH resource setting information for SBFD symbols. Therefore, the PUCCH resource allocation including the SBFD symbol may be performed based on the PUCCH resource set set for the SBFD symbol or a separate PUCCH resource also configured for the SBFD symbol. In addition, in this case, the frequency resource allocation (i.e., startingPRB and secondHopPRB allocation) contained in the separate PUCCH resource setting information may be based on the PRB index of the configured UL subband. For example, the lowest PRB of the UL subband may be set to 0, and the PRB offset value may be set accordingly. Alternatively, as before, it may be set based on the PRB index of the UL BWP.

[0197] As described above, in the case where a separate PUCCH resource setting is implicitly or explicitly performed for SBFD symbols, when interpreting the PUCCH resource allocation information of the base station of any terminal, it is possible to define whether to interpret the PUCCH resource allocation as being based on the existing PUCCH resource setting or as being based on a separate PUCCH resource setting for SBFD symbols, based on the type or type of symbol indicating the UCI transmission containing HARQ-ACK information (i.e., an existing UL symbol or flexible symbol that does not contain a UL subband, or an SBFD symbol with a UL subband set). When the terminal determines that the symbol of the PUCCH transmission containing HARQ-ACK information contains at least one or more SBFD symbols, it can be defined that the PUCCH transmission resource allocation is based on the PUCCH resource setting for the above-mentioned SBFD symbols. Alternatively, only when all symbols of the PUCCH transmission containing HARQ-ACK information are determined on the terminal to be SBFD symbols, it can be defined that the PUCCH transmission resource allocation is based on the PUCCH resource setting for the above-mentioned SBFD symbols. Alternatively, the base station may explicitly transmit indication information thereof to the terminal through L1 control signaling.

[0198] All examples formed by combining the above-mentioned Embodiment 1 and Embodiment 2 are included in the scope of the invention disclosed herein.

[0199] Next, a method capable of performing reference will be described with reference to the accompanying drawings. Figures 1 to 11The structures of part or all of the terminal and base station of the embodiment described above may be omitted to avoid repeated description. In this case, as long as it does not contradict the technical concept of the present invention, the omitted content can be substantially the same as in the following description.

[0200] Figure 12 is a diagram showing a structure of a terminal 1200 according to another embodiment.

[0201] refer to Figure 12 According to another embodiment, a terminal 1200 includes: a transmitting unit 1220; a receiving unit 1230; and a control unit 1210; which is used to control operations of the transmitting unit and the receiving unit.

[0202] The control unit 1210 controls the overall operation of the terminal 1200 according to the method of transmitting an uplink control channel in full-duplex communication required for performing the above-described present invention.

[0203] The control unit 1210 may receive uplink control channel configuration information. The control unit 1210 may receive configuration information for up to four uplink bandwidth parts (UL BWPs) from a base station for transmitting uplink control information. In this case, one of the multiple UL BWPs is activated, and radio resources for UL transmission are allocated based on this activation.

[0204] The control unit 1210 may receive uplink control channel configuration information for UCI transmission, where the UCI includes HARQ feedback information corresponding to each uplink bandwidth portion configured for the terminal. Specifically, the control unit 1210 may receive PUCCH resource configuration information and configuration information for at least one PUCCH resource set consisting of at least one PUCCH resource.

[0205] PUCCH resource configuration information may include PUCCH resource index information for each PUCCH resource, frequency hopping setting information, PUCCH format information, etc. In addition, PUCCH resource set configuration information may include PUCCH resource set index information, PUCCH resource list information consisting of a set of PUCCH resource indices constituting a PUCCH resource set, etc. A maximum of four PUCCH resource sets can be configured for one uplink bandwidth part, of which the first PUCCH resource set can contain a maximum of 32 PUCCH resources, and the remaining PUCCH resource sets can contain a maximum of eight PUCCH resources.

[0206] According to an example, when a subband full-duplex (SBFD) symbol is set for the terminal to support SBFD operation, the control unit 1210 can not only receive PUCCH resource configuration information and PUCCH resource set configuration information of the existing uplink symbol, but also receive PUCCH resource configuration information and PUCCH resource set configuration information for UCI (such as HARQ feedback information, etc.) transmission in the SBFD symbol.

[0207] The control unit 1210 may determine uplink control channel resources based on at least one of uplink control channel resource indication information (PUCCH resource indicator), control channel element (CCE) index information of received downlink control information, and payload size information of the uplink control information.

[0208] The control unit 1210 may determine the PUCCH resource for transmitting UCI (e.g., HARQ feedback information, etc.) based on the PUCCH resource configuration information and the PUCCH resource set configuration information. The control unit 1210 may determine the PUCCH resource set index and PUCCH resource index used to determine the PUCCH resource based on the payload size information of each UCI, the PUCCH resource indication information included in the DCI format, and the lowest CCE index information of the DCI transmission.

[0209] In this case, uplink control channel resources can be distinguished and determined based on whether the symbols allocated for uplink control channel transmission include SBFD symbols configured for an uplink subband used for full-duplex communication. According to one example, the case where the symbols allocated for uplink control channel transmission include SBFD symbols is equivalent to the case where all symbols used to perform uplink control channel transmission are SBFD symbols. Alternatively, according to another example, the case where the symbols allocated for uplink control channel transmission include SBFD symbols is equivalent to the case where at least one symbol among all symbols used to perform uplink control channel transmission is an SBFD symbol.

[0210] According to one example, when the symbols allocated for uplink control channel transmission include SBFD symbols, the uplink control channel resources used to transmit UCI may be determined from the uplink control channel resources included in the uplink subband in the frequency domain among the uplink control channel resources that comprise an uplink control channel resource set (PUCCH resource set). In this case, as in the past, the PUCCH resource allocation for the uplink subband in the SBFD symbols may be indicated based on the existing PUCCH resources and PUCCH resource set configured for the activated uplink bandwidth portion.

[0211] However, in this case, the PUCCH resource allocation in the SBFD symbol may be limited to performing PUCCH resource allocation only on the PUCCH resources that completely belong to the uplink subband on the frequency axis among the PUCCH resources constituting the PUCCH resource set. That is, the control unit 1210 may determine only the PUCCH resources whose all PUCCH frequency resources set according to the PUCCH resource completely belong to the uplink subband as the available (available) PUCCH resources in the SBFD symbol. Therefore, when the symbol used for UCI transmission includes an SBFD symbol, it may be limited to performing PUCCH resource allocation through the available PUCCH resource. At this time, in order to support UCI transmission such as HARQ-ACK of the uplink subband through the SBFD symbol at the terminal, the PUCCH resource set set for the terminal may include at least one or more available PUCCH resources.

[0212] According to another example, when the symbols allocated for uplink control channel transmission include SBFD symbols, the uplink control channel resources used to transmit UCI may be determined based on uplink control channel configuration information configured separately for the SBFD symbols. In other words, separate from the existing PUCCH configuration information, the control unit 1210 may also receive independent PUCCH configuration information for the SBFD symbols.

[0213] In this case, the uplink subband configuration information for the terminal may include separate PUCCH resource configuration information and PUCCH resource set configuration information for the terminal to transmit UCI through the uplink subband. For example, in order to allocate PUCCH resources for UCI transmission containing HARQ-ACK information of the terminal in the SBFD symbol, separate PUCCH configuration information PUCCH-configULSB may be defined. The PUCCH-configULSB can be set in a cell-specific manner, i.e., in units of uplink subbands, or in a terminal-specific manner.

[0214] When PUCCH-configULSB is configured in a cell-specific manner, the PUCCH-configULSBcommon configuration information may include a reference PUCCH resource for configuring one or more PUCCH resource sets for any uplink subband, and a PUCCH resource set size, i.e., PRB number information, for configuring a PUCCH resource set based on the reference PUCCH resource. Therefore, a separate PUCCH resource table (table) for setting reference PUCCH resources for uplink subbands may be defined. In this case, the reference PUCCH resource table may include information such as the PUCCH format, first symbol, number of symbols, PRB offset, and set of initial CS (CyclicShift) indexes for each index.

[0215] When the PUCCH-config ULSB is configured in a terminal-specific manner, the PUCCH-config ULSB may be configured according to the uplink subband configured for the terminal and based on the uplink subband. Therefore, the PUCCH-config ULSB may include PUCCH resource configuration information and PUCCH resource set configuration information based on the frequency resources of the uplink subband. In this case, the frequency resource allocation of the PUCCH resource may be based on the PRB index of the configured uplink subband. For example, the lowest PRB of the uplink subband may be set to 0, and the PRB offset value may be set accordingly. Alternatively, as before, it may be set based on the PRB index of the uplink bandwidth portion.

[0216] According to another example, when symbols allocated for uplink control channel transmission include SBFD symbols, uplink control channel resources used to transmit UCI may be determined based on uplink control channel resource set configuration information configured separately for the SBFD symbols. That is, in addition to including PUCCH resource configuration information or PUCCH resource set configuration information applicable to existing uplink symbols, existing PUCCH configuration information may also include separate PUCCH resource set configuration information for uplink subbands applicable to SBFD symbols.

[0217] In this case, the PUCCH-config configuration information for the uplink bandwidth portion including the uplink subband may include existing PUCCH resource set configuration information for uplink symbols that do not include the uplink subband, and separate PUCCH resource set configuration information for SBFD symbols. In other words, in addition to including PUCCH resource set configuration information applicable to existing uplink symbols, the existing PUCCH configuration information may also include separate PUCCH resource set configuration information applicable to uplink subbands for SBFD symbols.

[0218] In this case, the PUCCH resource configuration information included in the PUCCH-config can be applied to both the existing PUCCH resource set configuration for uplink symbols and the new PUCCH resource set configuration for SBFD symbols. In this case, the PUCCH resource set configuration for SBFD symbols can be configured based on the PUCCH resources available in the SBFD symbols among the PUCCH resources included in the PUCCH-config. That is, as described above, only PUCCH resources whose frequency resources completely belong to the uplink subband can be included in the PUCCH resource set for the SBFD symbol.

[0219] According to another example, when the symbols allocated for uplink control channel transmission include SBFD symbols, the uplink control channel resources used to transmit UCI can be determined based on uplink control channel resource configuration information set separately for the SBFD symbols and uplink control channel resource set configuration information set based on the separately set uplink control channel resource configuration information. In other words, the existing PUCCH configuration information may include PUCCH resource set configuration information for uplink symbols and separate PUCCH resource set configuration information for SBFD symbols. In addition, the existing PUCCH configuration information may also include PUCCH resource configuration information for uplink symbols and separate PUCCH resource configuration information for SBFD symbols.

[0220] Therefore, PUCCH resource allocation for SBFD symbols can be performed based on the PUCCH resource set configured for the SBFD symbol or on individual PUCCH resources also configured for the SBFD symbol. Furthermore, in this case, the frequency resource allocation included in the individual PUCCH resource configuration information can be based on the PRB index of the configured uplink subband. For example, the lowest PRB of the uplink subband can be set to 0, and the PRB offset value can be set accordingly. Alternatively, as before, it can be set based on the PRB index of the uplink bandwidth portion.

[0221] In order to determine the PUCCH resources used for UCI transmission, the control unit 1210 can determine, when interpreting the PUCCH resource allocation information of the base station, whether to interpret it as the PUCCH resource allocation being based on the existing PUCCH resource setting, or to interpret it as the PUCCH resource allocation being based on a separate PUCCH resource setting for SBFD symbols, based on the symbol type indicating UCI transmission.

[0222] According to one example, only when all symbols used for uplink control channel transmission are SBFD symbols, the control unit 1210 interprets the PUCCH resource allocation as being for SBFD symbols. Alternatively, when at least one of all symbols used for uplink control channel transmission is a SBFD symbol, the control unit 1210 interprets the PUCCH resource allocation as being for SBFD symbols.

[0223] In contrast, the control unit 1210 may interpret PUCCH resource allocation according to indication information via physical layer control signaling (L1 control signaling) received from the base station.

[0224] The control unit 1210 may transmit uplink control information to the base station using the determined uplink control channel resources.

[0225] Accordingly, a method and apparatus for efficiently transmitting and receiving an uplink control channel in a time slot or symbol suitable for full-duplex communication can be provided.

[0226] Figure 13 is a diagram showing the structure of a base station 1300 according to another embodiment.

[0227] refer to Figure 13 According to another embodiment, a base station 1300 includes: a transmitting unit 1320; a receiving unit 1330; and a control unit 1310 for controlling operations of the transmitting unit and the receiving unit.

[0228] Control unit 1310 controls the overall operation of base station 1300, using the method for receiving an uplink control channel during full-duplex communication required by the present invention. Transmitter 1320 transmits downlink control information, data, and messages to terminals via this channel. Receiver 1330 receives uplink control information, data, and messages from terminals via this channel.

[0229] The control unit 1310 may transmit uplink control channel configuration information. The control unit 1310 may transmit configuration information for up to four uplink bandwidth parts (UL BWPs) to the terminal for transmitting uplink control information. In this case, one of the multiple UL BWPs is activated, and radio resources for UL transmission are allocated based on this activation.

[0230] The control unit 1310 may transmit uplink control channel configuration information for UCI reception, where the UCI includes HARQ feedback information corresponding to each uplink bandwidth portion configured for the terminal. Specifically, the control unit 1310 may transmit PUCCH resource configuration information and configuration information for at least one PUCCH resource set consisting of at least one PUCCH resource to the terminal.

[0231] PUCCH resource configuration information may include PUCCH resource index information for each PUCCH resource, frequency hopping setting information, PUCCH format information, etc. In addition, PUCCH resource set configuration information may include PUCCH resource set index information, PUCCH resource list information consisting of a set of PUCCH resource indices constituting a PUCCH resource set, etc. A maximum of four PUCCH resource sets may be configured for one uplink bandwidth part, of which the first PUCCH resource set may contain a maximum of 32 PUCCH resources, and the remaining PUCCH resource sets may contain a maximum of eight PUCCH resources.

[0232] According to an example, when a subband full-duplex (SBFD) symbol is set for the terminal to support SBFD operation, the control unit 1310 can transmit, in addition to the PUCCH resource configuration information and PUCCH resource set configuration information of the existing uplink symbol, the PUCCH resource configuration information and PUCCH resource set configuration information used for UCI (such as HARQ feedback information, etc.) transmission in the SBFD symbol.

[0233] The control unit 1310 can receive uplink control information based on uplink control channel resources determined by at least one of uplink control channel resource indication information (PUCCH resource indicator), control channel element (CCE) index information of the transmitted downlink control information, and payload size information of the uplink control information.

[0234] The terminal may determine the PUCCH resource for transmitting UCI (e.g., HARQ feedback information, etc.) based on the PUCCH resource configuration information and the PUCCH resource set configuration information. The terminal may determine the PUCCH resource set index and PUCCH resource index used to determine the PUCCH resource based on the payload size information of each UCI, the PUCCH resource indication information included in the DCI format, and the lowest CCE index (lowest CCE index) information for DCI transmission.

[0235] In this case, uplink control channel resources can be distinguished and determined based on whether the symbols allocated for uplink control channel reception include SBFD symbols configured for an uplink subband for full-duplex communication. According to one example, the case where the symbols allocated for uplink control channel reception include SBFD symbols is equivalent to the case where all symbols used to perform uplink control channel reception are SBFD symbols. Alternatively, according to another example, the case where the symbols allocated for uplink control channel reception include SBFD symbols is equivalent to the case where at least one symbol among all symbols used to perform uplink control channel reception is an SBFD symbol.

[0236] According to one example, when symbols allocated for uplink control channel reception include SBFD symbols, uplink control channel resources used to receive UCI may be determined from uplink control channel resources included in uplink subbands in the frequency domain among uplink control channel resources comprising an uplink control channel resource set (PUCCH resource set). In this case, as in the past, PUCCH resource allocation for uplink subbands in SBFD symbols may be indicated based on existing PUCCH resources and PUCCH resource sets set for the activated uplink bandwidth portion.

[0237] However, in this case, the PUCCH resource allocation in the SBFD symbol may be limited to performing PUCCH resource allocation only on the PUCCH resources that completely belong to the uplink subband on the frequency axis among the PUCCH resources constituting the PUCCH resource set. That is, the terminal can only determine the PUCCH resources whose all PUCCH frequency resources set according to the PUCCH resource completely belong to the uplink subband as the available (available) PUCCH resources in the SBFD symbol. Therefore, when the symbol used for UCI reception includes an SBFD symbol, it may be limited to performing PUCCH resource allocation through the available PUCCH resource. At this time, in order to support UCI transmission such as HARQ-ACK of the uplink subband through the SBFD symbol at the terminal, the PUCCH resource set set for the terminal may include at least one or more available PUCCH resources.

[0238] According to another example, when the symbols allocated for uplink control channel reception include SBFD symbols, the uplink control channel resources for receiving UCI may be determined based on uplink control channel configuration information configured separately for the SBFD symbols. That is, separate from existing PUCCH configuration information, the control unit 1310 may also transmit independent PUCCH configuration information for SBFD symbols.

[0239] In this case, the uplink subband configuration information for the terminal may include separate PUCCH resource configuration information and PUCCH resource set configuration information for the terminal to transmit UCI through the uplink subband. For example, in order to allocate PUCCH resources for UCI transmission containing HARQ-ACK information of the terminal in the SBFD symbol, separate PUCCH configuration information PUCCH-configULSB may be defined. The PUCCH-configULSB can be set in a cell-specific manner, i.e., in units of uplink subbands, or in a terminal-specific manner.

[0240] When PUCCH-configULSB is configured in a cell-specific manner, the PUCCH-configULSBcommon configuration information may include a reference PUCCH resource for configuring one or more PUCCH resource sets for any uplink subband, and a PUCCH resource set size, i.e., PRB number information, for configuring a PUCCH resource set based on the reference PUCCH resource. Therefore, a separate PUCCH resource table (table) for setting reference PUCCH resources for uplink subbands may be defined. In this case, the reference PUCCH resource table may include information such as the PUCCH format, first symbol, number of symbols, PRB offset, and set of initial CS (CyclicShift) indexes for each index.

[0241] Furthermore, the PUCCH resource table may contain more than one table depending on the UCI payload size. Therefore, PUCCH-configULSBcommon may contain separate PUCCH resource sets per UCI payload size, i.e., information about the index setting for each PUCCH resource table and the number of PRBs. Furthermore, the PRB offset information for the table may be offset information relative to the lowest PRB of the uplink subband.

[0242] When the PUCCH-config ULSB is configured in a terminal-specific manner, the PUCCH-config ULSB may be configured according to the uplink subband configured for the terminal and based on the uplink subband. Therefore, the PUCCH-config ULSB may include PUCCH resource configuration information and PUCCH resource set configuration information based on the frequency resources of the uplink subband. In this case, the frequency resource allocation of the PUCCH resource may be based on the PRB index of the configured uplink subband. For example, the lowest PRB of the uplink subband may be set to 0, and the PRB offset value may be set accordingly. Alternatively, as before, it may be set based on the PRB index of the uplink bandwidth portion.

[0243] According to yet another example, when symbols allocated for uplink control channel reception include SBFD symbols, uplink control channel resources used to receive UCI may be determined based on uplink control channel resource set configuration information configured separately for the SBFD symbols. That is, in addition to including PUCCH resource configuration information or PUCCH resource set configuration information applicable to existing uplink symbols, existing PUCCH configuration information may also include separate PUCCH resource set configuration information for uplink subbands applicable to SBFD symbols.

[0244] In this case, the PUCCH-config configuration information for the uplink bandwidth portion including the uplink subband may include existing PUCCH resource set configuration information for uplink symbols that do not include the uplink subband, and separate PUCCH resource set configuration information for SBFD symbols. In other words, in addition to including PUCCH resource set configuration information applicable to existing uplink symbols, the existing PUCCH configuration information may also include separate PUCCH resource set configuration information applicable to uplink subbands for SBFD symbols.

[0245] In this case, the PUCCH resource configuration information included in the PUCCH-config can be applied to both the existing PUCCH resource set configuration for uplink symbols and the new PUCCH resource set configuration for SBFD symbols. In this case, the PUCCH resource set configuration for SBFD symbols can be configured based on the PUCCH resources available in the SBFD symbols among the PUCCH resources included in the PUCCH-config. That is, as described above, only PUCCH resources whose frequency resources completely belong to the uplink subband can be included in the PUCCH resource set for the SBFD symbol.

[0246] According to another example, when the symbols allocated for uplink control channel reception include SBFD symbols, the uplink control channel resources used to receive UCI can be determined based on uplink control channel resource configuration information set separately for the SBFD symbols and uplink control channel resource set configuration information set based on the separately set uplink control channel resource configuration information. That is, the existing PUCCH configuration information may include PUCCH resource set configuration information for uplink symbols and separate PUCCH resource set configuration information for SBFD symbols. In addition, the existing PUCCH configuration information may also include PUCCH resource configuration information for uplink symbols and separate PUCCH resource configuration information for SBFD symbols.

[0247] Therefore, PUCCH resource allocation for SBFD symbols can be performed based on the PUCCH resource set configured for the SBFD symbol or on individual PUCCH resources also configured for the SBFD symbol. Furthermore, in this case, the frequency resource allocation included in the individual PUCCH resource configuration information can be based on the PRB index of the configured uplink subband. For example, the lowest PRB of the uplink subband can be set to 0, and the PRB offset value can be set accordingly. Alternatively, as before, it can be set based on the PRB index of the uplink bandwidth portion.

[0248] In order to determine the PUCCH resources used for UCI transmission, when interpreting the PUCCH resource allocation information of the base station, the terminal can determine whether to interpret the PUCCH resource allocation as being based on the existing PUCCH resource setting, or to interpret the PUCCH resource allocation as being based on a separate PUCCH resource setting for SBFD symbols, based on the symbol type indicating UCI transmission.

[0249] According to one example, only when all symbols used for uplink control channel transmission are SBFD symbols, the terminal interprets the PUCCH resource allocation as being for SBFD symbols. Alternatively, when at least one of all symbols used for uplink control channel transmission is a SBFD symbol, the terminal interprets the PUCCH resource allocation as being for SBFD symbols.

[0250] Alternatively, the control unit 1310 may transmit indication information for explaining PUCCH resource allocation of the terminal via physical layer control signaling (L1 control signaling).

[0251] The control unit 1310 may receive UCI from the terminal using the determined uplink control channel resources.

[0252] Accordingly, a method and apparatus for efficiently transmitting and receiving an uplink control channel in a time slot or symbol suitable for full-duplex communication can be provided.

[0253] The above-described embodiments may be supported by standard documents disclosed in at least one of IEEE 802, 3GPP, and 3GPP2, which are wireless access systems. Specifically, in this embodiment, steps, configurations, and components not described to clearly illustrate the technical concept may be supported by these standard documents. Furthermore, all terms disclosed in this specification are to be interpreted in accordance with these standard documents.

[0254] The above embodiment can be implemented by various means. For example, the embodiment can be implemented by hardware, firmware, software, or a combination thereof.

[0255] In the case of hardware implementation, the method according to this embodiment can be implemented by one or more ASICs (Application Specific Integrated Circuits), DSPs (Digital Signal Processors), DSPDs (Digital Signal Processing Devices), PLDs (Programmable Logic Devices), FPGAs (Field Programmable Gate Arrays), processors, controllers, microcontrollers or microprocessors, etc.

[0256] When implemented via firmware or software, the method according to this embodiment can be implemented in the form of a device, process, or function that performs the functions or operations described above. The software code can be stored in a storage unit and driven by a processor. The storage unit is located inside or outside the processor and can exchange data with the processor via various known devices.

[0257] In addition, the above-mentioned terms such as "system", "processor", "controller", "component", "module", "interface", "model" or "unit" may generally refer to physical hardware related to a computer, a combination of hardware and software, software or running software. For example, the aforementioned components may be processes driven by a processor, processors, controllers, control processors, individuals, execution threads, programs and / or computers, but are not limited to these. For example, an application running in a controller or processor and the controller or processor may become components. One or more components may be located in a process and / or execution thread, and a component may be located in one device (such as a system, computing device, etc.) or distributed in two or more devices.

[0258] The above description is merely an exemplary description of the technical ideas of the present disclosure, and those skilled in the art to which the present disclosure belongs may make various modifications and changes without departing from the essential features of the technical ideas of the present disclosure. In addition, the present embodiment is intended to illustrate the technical ideas of the present disclosure rather than to limit them, and therefore, the scope of the technical ideas of the present disclosure is not limited by these embodiments. The scope of protection of the present disclosure should be interpreted in accordance with the following claims, and all technical ideas within the equivalent scope thereof should be interpreted as included within the scope of rights of the present disclosure.

[0259] CROSS-REFERENCE TO RELATED APPLICATIONS

[0260] This patent application claims priority under Section 119(a) of the United States Patent Act (35 U.S.C. §119(a)) to Patent Application No. 10-2023-0006949 filed in South Korea on January 17, 2023, and Patent Application No. 10-2024-0006821 filed in South Korea on January 16, 2024, the entire contents of which are hereby incorporated by reference into this patent application. This patent application also claims priority in countries other than the United States for the same reasons as above, the entire contents of which are hereby incorporated by reference into this patent application.

Claims

1. A method for transmitting an uplink control channel (PUCCH) by a terminal in full-duplex communication, comprising: The step of receiving uplink control channel configuration information; determining uplink control channel resources based on at least one of uplink control channel resource indication information, control channel element index information of received downlink control information, and payload size information of the uplink control information; as well as The step of transmitting the uplink control information via the uplink control channel resources, The uplink control channel resources are distinguished and determined according to whether the symbols allocated for uplink control channel transmission include sub-band full-duplex (SBFD) symbols configured with an uplink sub-band for full-duplex communication.

2. The method according to claim 1, wherein When the symbols allocated to the uplink control channel transmission include SBFD symbols, the uplink control channel resources are determined from uplink control channel resources included in the uplink subband in the frequency domain among uplink control channel resources constituting an uplink control channel resource set.

3. The method according to claim 1, wherein When the symbols allocated for the uplink control channel transmission include SBFD symbols, the uplink control channel resources are determined based on uplink control channel configuration information separately set for the SBFD symbols.

4. The method according to claim 1, wherein When the symbols allocated for the uplink control channel transmission include SBFD symbols, the uplink control channel resources are determined based on uplink control channel resource set configuration information separately set for the SBFD symbols.

5. The method according to claim 1, wherein When the symbols allocated to the uplink control channel transmission include SBFD symbols, the uplink control channel resources are determined based on uplink control channel resource configuration information set separately for the SBFD symbols and uplink control channel resource set configuration information set based on the separately set uplink control channel resource configuration information.

6. The method according to claim 1, wherein The case where the symbols allocated to the uplink control channel transmission include SBFD symbols is a case where all symbols used to perform the uplink control channel transmission are the SBFD symbols.

7. The method according to claim 1, wherein The case where the symbols allocated to the uplink control channel transmission include SBFD symbols is a case where at least one symbol among all symbols used to perform the uplink control channel transmission is the SBFD symbol.

8. A method for a base station to receive an uplink control channel (PUCCH) in full-duplex communication, comprising: The step of transmitting uplink control channel configuration information; as well as receiving the uplink control information by using an uplink control channel resource determined based on at least one of uplink control channel resource indication information, control channel element index information of the transmitted downlink control information, and payload size information of the uplink control information; The uplink control channel resources are distinguished and determined according to whether the symbols allocated to the uplink control channel reception include sub-band full-duplex (SBFD) symbols configured with an uplink sub-band for full-duplex communication.

9. The method according to claim 8, wherein When the symbols allocated to the uplink control channel reception include SBFD symbols, the uplink control channel resources are determined from uplink control channel resources included in the uplink subband in the frequency domain among uplink control channel resources constituting an uplink control channel resource set.

10. The method according to claim 8, wherein When the symbols allocated for reception of the uplink control channel include SBFD symbols, the uplink control channel resources are determined based on uplink control channel configuration information individually set for the SBFD symbols.

11. The method according to claim 8, wherein When the symbols allocated for reception of the uplink control channel include SBFD symbols, the uplink control channel resources are determined based on uplink control channel resource set configuration information individually set for the SBFD symbols.

12. The method according to claim 8, wherein When the symbols allocated to the uplink control channel reception include SBFD symbols, the uplink control channel resources are determined based on uplink control channel resource configuration information set separately for the SBFD symbols and uplink control channel resource set configuration information set based on the separately set uplink control channel resource configuration information.

13. The method according to claim 8, wherein The case where the symbols allocated to the uplink control channel reception include SBFD symbols is a case where all symbols used to perform the uplink control channel reception are the SBFD symbols.

14. The method according to claim 8, wherein The case where the symbols allocated to the uplink control channel reception include SBFD symbols is a case where at least one symbol among all symbols used to perform the uplink control channel reception is the SBFD symbol.

15. A terminal for transmitting an uplink control channel (PUCCH) in full-duplex communication, comprising: Sending Department; Receiving Department; as well as a control unit, configured to control operations of the sending unit and the receiving unit; The control unit is configured to receive uplink control channel configuration information, determine uplink control channel resources based on at least one of uplink control channel resource indication information, control channel element index information of received downlink control information, and payload size information of the uplink control information, and transmit the uplink control information through the uplink control channel resources. The uplink control channel resources are distinguished and determined according to whether the symbols allocated for uplink control channel transmission include sub-band full-duplex (SBFD) symbols configured with an uplink sub-band for full-duplex communication. The terminal according to claim 15 , wherein: When the symbols allocated for the uplink control channel transmission include SBFD symbols, the uplink control channel resources are determined from the uplink control channel resources included in the uplink subband in the frequency domain among the uplink control channel resources constituting an uplink control channel resource set (PUCCH resource set). The terminal according to claim 15 , wherein: When the symbols allocated for the uplink control channel transmission include SBFD symbols, the uplink control channel resources are determined based on uplink control channel configuration information separately set for the SBFD symbols. The terminal according to claim 15 , wherein: When the symbols allocated for the uplink control channel transmission include SBFD symbols, the uplink control channel resources are determined based on uplink control channel resource set configuration information separately set for the SBFD symbols. The terminal according to claim 15 , wherein: When the symbols allocated to the uplink control channel transmission include SBFD symbols, the uplink control channel resources are determined based on uplink control channel resource configuration information set separately for the SBFD symbols, and uplink control channel resource set configuration information set based on the separately set uplink control channel resource configuration information.

20. The terminal according to claim 15, wherein The case where the symbols allocated to the uplink control channel transmission include SBFD symbols is a case where all symbols used to perform the uplink control channel transmission are the SBFD symbols.

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