Method and apparatus for transmitting uplink in wireless network

Abstract

The present embodiment provides a method for transmitting an uplink by a terminal, the method comprising the steps of: determining a format of a symbol as one of a downlink symbol, an uplink symbol, and a flexible symbol based on time division duplex (TDD) configuration information received from a base station; receiving configuration information on an uplink sub-band and a downlink sub-band for full duplex communication; receiving additional information for uplink transmission in a reconfiguration symbol configured with an uplink subband among symbols whose format has been determined as downlink symbols; and transmitting the uplink in the reconfiguration symbol based on the additional information for the uplink transmission in the reconfiguration symbol, in which frequency resources for the uplink transmission are limited to a region within the frequency domain of the uplink subband.

Description

Technical Field

[0001] This embodiment proposes a method and device for transmitting uplink in a next generation wireless access network (hereinafter referred to as "new radio (NR)"). Background Art

[0002] Recently, the 3rd Generation Partnership Project (3GPP) approved "New Air Interface Access Technology Research", a research project for the study of next-generation / 5G radio access technology (hereinafter referred to as "new air interface" or "NR"). Based on the new air interface access technology research, the Radio Access Network Working Group 1 (RAN WG1) has been discussing the frame structure, channel coding and modulation, waveform, multiple access method, etc. of the new air interface (NR). NR needs to be designed to not only provide improved data transmission rates compared to long-term evolution (LTE) / LTE-Advanced, but also meet various requirements in specific and particular usage scenarios.

[0003] Enhanced mobile broadband (eMBB), massive machine-type communication (mMTC) and ultra-reliable and low latency communication (URLLC) are proposed as representative use cases for NR. In order to meet the requirements of each scenario, NR needs to be designed with a flexible frame structure compared to LTE / LTE-Advanced.

[0004] Since the requirements for data rate, latency, reliability, coverage, etc. are different from each other, a method for efficiently multiplexing wireless resource units based on different parameter sets (for example, subcarrier spacing, subframe, transmission time interval (Transmission Time Interval, TTI), etc.) is needed as a method to efficiently meet the requirements of each usage scenario by constituting the frequency band of any NR system.

[0005] As part of this aspect, a specific design is needed that can allow uplink transmissions in wireless networks in symbols where full-duplex communication is applied. Summary of the invention

[0006] Technical issues

[0007] Embodiments of the present disclosure may provide a method and apparatus for transmitting uplink in NR.

[0008] Technical Solution

[0009] In one aspect, the present embodiment may provide a method for transmitting an uplink by a UE, comprising determining the format of a symbol as any one of a downlink symbol, an uplink symbol, and a flexible symbol based on time division duplex (TDD) configuration information received from a base station, receiving configuration information about uplink subbands and downlink subbands for full-duplex communication, receiving additional information for uplink transmission in a reconfigured symbol for a configured uplink subband among symbols whose format is determined to be a downlink symbol, and transmitting an uplink in the reconfigured symbol based on the additional information for the uplink transmission in the reconfigured symbol, wherein the frequency resources used for the uplink transmission are restricted to the frequency domain of the uplink subband.

[0010] In another aspect, the present embodiment may provide a method for receiving an uplink by a base station, comprising transmitting time division duplex (TDD) configuration information, transmitting configuration information about uplink subbands and downlink subbands for full-duplex communication, transmitting additional information for uplink reception in a reconfiguration symbol for a configured uplink subband among symbols whose formats are determined as downlink symbols based on the TDD configuration information, and receiving an uplink in the reconfiguration symbol based on the additional information for uplink reception in the reconfiguration symbol, wherein frequency resources used for the uplink reception are restricted to the frequency domain of the uplink subband.

[0011] In another aspect, the present embodiment may provide a UE for transmitting uplink, comprising a transmitter, a receiver and a controller for controlling the operation of the transmitter and the receiver, wherein the controller determines the format of a symbol as any one of a downlink symbol, an uplink symbol and a flexible symbol based on time division duplex (TDD) configuration information received from a base station, receives configuration information about uplink subbands and downlink subbands for full-duplex communication, receives additional information for uplink transmission in a reconfigured symbol for a configured uplink subband among symbols whose format is determined to be a downlink symbol, and transmits uplink in the reconfigured symbol based on the additional information for uplink transmission in the reconfigured symbol, and wherein the frequency resources used for the uplink transmission are limited to the frequency domain of the uplink subband.

[0012] In another aspect, the present embodiment may provide a base station for receiving an uplink, comprising a transmitter, a receiver, and a controller for controlling the operation of the transmitter and the receiver, wherein the controller transmits time division duplex (TDD) configuration information, transmits configuration information about uplink subbands and downlink subbands for full-duplex communication, transmits additional information for uplink reception in reconfiguration symbols for a configured uplink subband among symbols whose formats are determined as downlink symbols based on the TDD configuration information, and additional information for uplink reception in the reconfiguration symbols, and receives an uplink in the reconfiguration symbols, wherein frequency resources used for the uplink reception are limited to the frequency domain of the uplink subband.

[0013] Beneficial Effects

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

[0015] Figure 1 2 is a diagram schematically illustrating an NR wireless communication system according to an embodiment of the present disclosure.

[0016] Figure 2 2 is a view schematically showing a frame structure in an NR system according to an embodiment of the present disclosure.

[0017] Figure 3 It is a view for explaining a resource grid supported by a wireless access technology according to an embodiment of the present disclosure.

[0018] Figure 4 It is a view for explaining a bandwidth part supported by a wireless access technology according to an embodiment of the present disclosure.

[0019] Figure 5 is a view showing an example of a synchronization signal block in a wireless access technology according to an embodiment of the present disclosure.

[0020] Figure 6 It is a signal diagram for explaining a random access procedure in a wireless access technology according to an embodiment of the present disclosure.

[0021] Figure 7 It is a view used to illustrate CORESET.

[0022] Figure 8 is a view showing an example of symbol-level alignment among different subcarrier spacings (SCS) according to an embodiment of the present disclosure.

[0023] Fig. 9is a view schematically showing a bandwidth portion to which an embodiment of the present disclosure can be applied.

[0024] Fig.10 is a view showing a process in which a UE performs uplink transmission according to an embodiment.

[0025] Fig.11 is a view illustrating a process of performing uplink reception through a boundary space according to an embodiment.

[0026] Fig.12 and Fig.13 is a view showing a TDD frame in which a full-duplex subband is configured according to an embodiment.

[0027] Fig.14 is a view showing a configuration of a UE according to another embodiment.

[0028] Fig.15 is a view showing a configuration of a base station according to another embodiment. DETAILED DESCRIPTION

[0029] Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals are used throughout the accompanying drawings to represent the same elements, even if they are shown on different drawings. In addition, in the following description of the present disclosure, the detailed description of the known functions and configurations contained herein will be omitted when it may make the subject matter of the present disclosure quite unclear. When expressions such as "including", "having", "comprising" mentioned herein are used, any other parts may be added unless "only" is used. When an element is represented in the singular, the element may cover the plural form unless the element is specifically mentioned.

[0030] In addition, when describing the components of the present disclosure, terms such as first, second, A, B, (A), (B), etc. may be used herein. Each of these terms is not used to define the nature, order or sequence of the corresponding component but is only used to distinguish the corresponding component from other components.

[0031] When describing the positional relationship between components, if two or more components are described as being “connected,” “combined,” or “coupled” to each other, it should be understood that the two or more components may be directly “connected,” “combined,” or “coupled” to each other, and the two or more components may be “connected,” “combined,” or “coupled” to each other through another component “interposed” therebetween. In this case, the other component may be included in at least one of the two or more components that are “connected,” “combined,” or “coupled” to each other.

[0032] For example, when describing a series of operating methods or manufacturing methods, the use of expressions such as "after", "subsequently", "next", and "before" may also include situations where the operations or processes are not performed continuously, unless "immediately" or "immediately" is used in the expression.

[0033] Numerical values ​​of components mentioned herein or information corresponding thereto (eg, levels, etc.) may be construed as including error ranges caused by various factors (eg, process factors, internal or external influences, noise, etc.) even if no explicit description is provided.

[0034] The wireless communication system in this specification refers to a system that uses wireless resources to provide various communication services (such as voice services and data services). The wireless communication system may include user equipment (UE), base stations, core networks, etc.

[0035] The embodiments disclosed below may be applied to wireless communication systems using various wireless access technologies. For example, these embodiments may be applied to various wireless 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), non-orthogonal multiple access (NOMA), etc. In addition, wireless access technology may refer to various generations of communication technologies established by various communication organizations (such as 3GPP, 3GPP2, Wi-Fi, Bluetooth, IEEE, ITU, etc.), as well as specific access technologies. For example, CDMA may be implemented as wireless technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA may be implemented as wireless technologies such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate for GSM Evolution (EDGE). OFDMA can be implemented as a wireless technology such as IEEE (Institute of Electrical and Electronics Engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA), etc. IEEE 802.16m is an evolution of IEEE 802.16e, which provides backward compatibility with systems based on IEEE 802.16e. UTRA is part of the Universal Mobile Telecommunications System (UMTS). 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) is a part of E-UMTS (Evolved UMTS) using Evolved UMTS Terrestrial Radio Access (E-UTRA), which adopts OFDMA in the downlink and SC-FDMA in the uplink. As described above, the embodiments can be applied to wireless access technologies that have been launched or commercialized, and can be applied to wireless access technologies that are being developed or will be developed in the future.

[0036] The UE used in the specification must be understood in a broad sense, indicating a device including a wireless communication module that communicates with a base station in a wireless communication system. For example, UE includes user equipment (UE) in WCDMA, LTE, NR, HSPA, IMT-2020 (5G or new air interface), mobile stations in GSM, user terminals (UT), user stations (SS), wireless devices, etc. In addition, UE can be a portable user device, such as a smartphone, or, depending on its type of use, a vehicle in a V2X communication system, a device including a wireless communication module in a vehicle, etc. In the case of a machine type communication (MTC) system, UE can refer to an MTC terminal, an M2M terminal, or a URLLC terminal, which uses a communication module capable of performing machine type communication.

[0037] A base station or cell in this specification refers to an end portion that communicates with a UE through a network and includes various coverage areas, such as a Node B, an evolved Node B (eNB), a gNode-B, a low power node (LPN), a sector, a site, various types of antennas, a base transceiver system (BTS), an access point, a point (e.g., a transmission point, a reception point, or a transmission / reception point), a relay node, a megacell, a macrocell, a microcell, a picocell, a femtocell, a remote radio head (RRH), a radio unit (RU), a small cell, etc. In addition, the cell may be used as a meaning including a bandwidth part (BWP) in the frequency domain. For example, a serving cell may refer to an active BWP of a UE.

[0038] The various cells listed above are equipped with a base station that controls one or more cells, and the base station can be understood in two meanings. The base station can be 1) a device for providing a megacell, macrocell, microcell, picocell, femtocell or small cell connected to a wireless area, or the base station can be 2) the wireless area itself. In the above description 1), the base station can be a device controlled by the same entity and providing a predetermined wireless area, or it can be all devices that interact with each other and collaborate to configure the wireless area. For example, depending on the configuration method of the wireless area, the base station can be a point, a transmitting / receiving point, a transmitting point, a receiving point, etc. In the above description 2), the base station can be a wireless area in which a user equipment (UE) can transmit data to other UEs or adjacent base stations and receive data from other UEs or adjacent base stations.

[0039] In this specification, a cell may refer to a coverage of a signal transmitted from a transmission / reception point, a component carrier having coverage of a signal transmitted from a transmission / reception point (or transmission point), or a transmission / reception point itself.

[0040] Uplink (UL) refers to a scheme for transmitting data from a UE to a base station, and downlink (DL) refers to a scheme for transmitting data from a base station to a UE. Downlink may mean communication or a communication path from multiple transmit / receive points to a UE, and uplink may mean communication or a communication path from a UE to multiple transmit / receive points. In the downlink, a transmitter may be part of multiple transmit / receive points, and a receiver may be part of a UE. In addition, in the uplink, a transmitter may be part of a UE, and a receiver may be part of multiple transmit / receive points.

[0041] The uplink and downlink transmit and receive control information on control channels such as the physical downlink control channel (PDCCH) and the physical uplink control channel (PUCCH). The uplink and downlink transmit and receive data on data channels such as the physical downlink shared channel (PDSCH) and the physical uplink shared channel (PUSCH). In the following, the transmission and reception of signals on channels such as PUCCH, PUSCH, PDCCH, PDSCH, etc. may be expressed as "PUCCH, PUSCH, PDCCH, PDSCH, etc. are transmitted and received".

[0042] For clarity, the following description will focus on a 3GPP LTE / LTE-A / NR (New Radio) communication system, but the technical features of the present disclosure are not limited to the corresponding communication system.

[0043] After studying 4G (fourth generation) communication technology, 3GPP has been developing 5G (fifth generation) communication technology to meet the requirements of ITU-R for next-generation wireless access technology. Specifically, 3GPP is developing LTE-A pro as 5G communication technology by improving LTE-Advanced technology to meet the requirements of ITU-R and developing a new NR communication technology that is completely different from 4G communication technology. Both LTE-A pro and NR refer to 5G communication technology. In the following, unless a specific communication technology is specified, 5G communication technology will be described based on NR.

[0044] Considering satellite, automotive, new verticals, etc. in typical 4G LTE scenarios, various operation scenarios are defined in NR to support enhanced mobile broadband (eMBB) scenarios in terms of services, massive machine type communication (mMTC) scenarios where UEs are distributed over a wide area with high UE density, requiring low data rates and asynchronous connections, and ultra-reliability and low latency (URLLC) scenarios that require high responsiveness and reliability and support high-speed mobility.

[0045] To meet these scenarios, NR introduces a wireless communication system that adopts new waveform and frame structure technologies, low-latency technologies, ultra-high frequency band (mmWave) support technologies, and forward compatibility provision technologies. In particular, the NR system has made various technical changes in terms of flexibility to provide forward compatibility. The main technical features of NR will be described below with reference to the accompanying drawings.

[0046] <Overview of NR System>

[0047] Figure 1 is a view schematically showing an NR system to which this embodiment can be applied.

[0048] Referring to Figure 1 , the NR system is divided into a 5G core network (5GC) and an NG-RAN part. The NG-RAN includes gNBs and ng-eNBs, which provide user plane (SDAP / PDCP / RLC / MAC / PHY) and user equipment (UE) control plane (RRC) protocol terminations. Multiple gNBs or one gNB and ng-eNB are connected to each other through the Xn interface. The gNB and ng-eNB are respectively connected to the 5GC through the NG interface. The 5GC can be configured to include an access and mobility management function (AMF) for managing the control plane (such as UE connection and mobility control functions), and a user plane function (UPF) for controlling user data. NR supports frequency bands below 6 GHz (Frequency Range 1 FR1 FR1) and frequency bands equal to or greater than 6 GHz (Frequency Range 2 FR2 FR2).

[0049] A gNB represents a base station that provides NR user plane and control plane protocol terminations to a UE. An ng-eNB represents a base station that provides E-UTRA user plane and control plane protocol terminations to a UE. The base stations described in this specification should be understood to include gNBs and ng-eNBs. However, as needed, the base station can also be used to separately refer to gNBs or ng-eNBs.

[0050] <NR Waveform, Parameter Set and Frame Structure>

[0051] NR uses the CP-OFDM waveform for downlink transmission, which uses a cyclic prefix, and uses CP-OFDM or DFT-s-OFDM for uplink transmission. The OFDM technology is easy to combine with multiple-input multiple-output (MIMO) schemes and allows for the use of low-complexity receivers with high frequency efficiency.

[0052] Since the above three scenarios have different requirements for data rate, delay rate, coverage, etc. in NR, it is necessary to efficiently meet the requirements of each scenario in the frequency band that constitutes the NR system. To this end, a technology for efficiently multiplexing wireless resources based on multiple different parameter sets has been proposed.

[0053] Specifically, the NR transmission parameter set is determined based on the subcarrier spacing and the cyclic prefix (CP). As shown in Table 1 below, "μ" is used as an exponential value of 2 so that it changes exponentially based on 15kHz.

[0054] [Table 1]

[0055]

[0056]

[0057] As shown in Table 1 above, NR can have five types of parameter sets according to the subcarrier spacing. This is different from LTE, which is one of the 4G communication technologies, in which the subcarrier spacing is fixed to 15kHz. Specifically, in NR, the subcarrier spacing for data transmission is 15kHz, 30kHz, 60kHz or 120kHz, and the subcarrier spacing for synchronization signal transmission is 15kHz, 30kHz, 120kHz or 240kHz. In addition, the extended CP is only applied to the subcarrier spacing of 60kHz. A frame including 10 subframes and a length of 10ms is defined in the frame structure of NR, and each subframe has the same length of 1ms. A frame can be divided into half frames of 5ms, and each half frame includes 5 subframes. When the subcarrier spacing is 15kHz, a subframe includes a time slot, and each time slot includes 14 OFDM symbols. Figure 2 1 is a view for explaining a frame structure in an NR system to which this embodiment can be applied. Figure 2 , in the case of a conventional CP, one slot includes 14 OFDM symbols, which is fixed, but the length of the slot in the time domain can vary according to the subcarrier spacing. For example, in the case of a parameter set with a 15kHz subcarrier spacing, the slot is configured to have the same 1ms length as the subframe. On the other hand, in the case of a parameter set with a 30kHz subcarrier spacing, the slot includes 14 OFDM symbols, but one subframe can include two slots, each with a length of 0.5ms. That is, subframes and frames can be defined using a fixed time length, and a slot can be defined as the number of symbols so that its time length varies according to the subcarrier spacing.

[0058] NR defines the basic unit of scheduling as a time slot and also introduces mini - slots (or sub - slots or non - time - slot - based scheduling) to reduce the transmission delay in the radio section. If a wide sub - carrier spacing is used, the length of a time slot is shortened inversely proportionally to it, thus reducing the transmission delay in the radio section. Mini - slots (or sub - slots) are designed to efficiently support the URLLC scenario, and mini - slots can be scheduled in units of 2, 4, or 7 symbol units.

[0059] In addition, different from LTE, NR defines the uplink and downlink resource allocation at the symbol level within a time slot. To reduce the HARQ delay, a time - slot structure has been defined that can directly transmit HARQ ACK / NACK within one transmission time slot. This time - slot structure is called the "self - contained structure" and will be described.

[0060] NR is designed to support a total of 256 time - slot formats, of which 62 time - slot formats are used in 3GPP Rel - 15. In addition, NR supports a common frame structure that constitutes FDD or TDD frames through various combinations of time slots. For example, NR supports i) a time - slot structure in which all symbols of one time slot are configured for downlink, ii) a time - slot structure in which all symbols are configured for uplink, and iii) a time - slot structure in which downlink symbols and uplink symbols are mixed. In addition, NR supports data transmission scheduled to be allocated to one or more time slots. Therefore, the base station can use the Time - Slot Format Indicator (SFI) to notify the UE whether the time slot is a downlink time slot, an uplink time slot, or a flexible time slot. The base station can notify the time - slot format by giving an instruction (using the SFI, i.e., the index of a table configured by UE - specific RRC signaling). In addition, the base station can dynamically indicate the time - slot format through Downlink Control Information (DCI), or can statically or quasi - statically indicate the time - slot format through RRC signaling.

[0061] <Physical Resources of NR>

[0062] Regarding the physical resources in NR, antenna ports, resource grids, resource elements, resource blocks, bandwidth parts, etc. are considered.

[0063] An antenna port is defined such that one channel carrying one symbol on one antenna port can be inferred from another channel carrying another symbol on the same antenna port. If the large - scale properties of one channel carrying one symbol on one antenna port can be inferred from another channel carrying one symbol on another antenna port, then these two antenna ports have a quasi - co - located or quasi - co - sited (QC / QCL) relationship. The large - scale properties include at least one of delay spread, Doppler spread, frequency shift, average received power, and reception timing.

[0064] Figure 3Shows a resource grid supported by a wireless access technology according to an embodiment of the present disclosure.

[0065] Referring Figure 3 , since NR supports multiple parameter sets in the same carrier, the resource grid can exist according to the corresponding parameter set. In addition, the resource grid can exist depending on the antenna port, subcarrier spacing, and transmission direction.

[0066] A resource block includes 12 subcarriers and is defined only in the frequency domain. In addition, a resource element includes one OFDM symbol and one subcarrier. Therefore, as Figure 3 shown, the size of a resource block can vary according to the subcarrier spacing. In addition, "Point A", which serves as a common reference point for the resource block grid, common resource block, and virtual resource block, is defined in NR.

[0067] Figure 4 Shows a bandwidth part supported by a wireless access technology according to an embodiment of the present disclosure.

[0068] Different from LTE where the carrier bandwidth is fixed at 20 MHz, in NR, the maximum carrier bandwidth depends on the subcarrier spacing and is configured to be 50 MHz to 400 MHz. Therefore, it is not assumed that all UEs use the entire carrier bandwidth. Therefore, as Figure 4 shown, in NR, a bandwidth part (BWP) can be specified within the carrier bandwidth so that a UE can use it. In addition, the bandwidth part can be associated with a parameter set, can include a subset of consecutive common resource blocks, and can be dynamically activated over time. A UE has up to four bandwidth parts in each of the uplink and downlink. The UE transmits and receives data using the activated bandwidth part at a given time.

[0069] In the case of paired spectrum, the uplink and downlink bandwidth parts are configured independently. In the case of unpaired spectrum, to prevent unnecessary frequency retuning between the downlink operation and the uplink operation, the downlink bandwidth part and the uplink bandwidth part are paired and configured to share a center frequency.

[0070] <Initial Access in NR>

[0071] In NR, a UE performs a cell search and a random access process to access a base station and communicate with the base station.

[0072] Cell search is a process in which a UE synchronizes with a cell of a corresponding base station using a synchronization signal block (SSB) transmitted from the base station and obtains the physical layer cell ID and system information.

[0073] Figure 5 Shows an example of a synchronization signal block in a wireless access technology according to an embodiment of the present disclosure.

[0074] Reference Figure 5 , SSB includes the primary synchronization signal (PSS) and secondary synchronization signal (SSS) occupying one symbol and 127 subcarriers, and the PBCH spanning three OFDM symbols and 240 subcarriers.

[0075] The UE monitors the SSB in the time-frequency domain, thereby receiving the SSB.

[0076] An SSB can be transmitted up to 64 times in 5 ms. Multiple SSBs are transmitted over different transmit beams within a 5 ms period, and the UE performs detection based on the specific beam used for transmission, assuming that an SSB is transmitted every 20 ms. The number of beams available for SSB transmission in 5 ms increases with the frequency band. For example, up to 4 SSB beams can be transmitted on frequency bands of 3 GHz or lower, and up to 8 SSB beams can be transmitted on frequency bands of 3 GHz to 6 GHz. In addition, SSB can be transmitted using up to 64 different beams on frequency bands of 6 GHz or higher.

[0077] One slot includes two SSBs, and the start symbol and the number of repetitions in the slot are determined as follows according to the subcarrier spacing.

[0078] Unlike SS in typical LTE systems, SSB is not transmitted at the center frequency of the carrier bandwidth. That is, SSB can also be transmitted at frequencies other than the center of the system band, and multiple SSBs can be transmitted in the frequency domain when wideband operation is supported. Therefore, the UE uses a synchronization raster to monitor SSB, and the synchronization raster is a candidate frequency position for monitoring SSB. The carrier raster and synchronization raster are newly defined in NR, which are the center frequency position information of the channel used for initial connection, and the synchronization raster can support the UE's fast SSB search because its frequency interval is configured to be wider than the frequency interval of the carrier raster.

[0079] The UE can obtain the MIB through the PBCH of the SSB. The MIB (Master Information Block) includes the minimum information for the UE to receive the remaining minimum system information (RMSI) broadcast by the network. In addition, the PBCH may include information about the position of the first DM-RS symbol in the time domain, information for the UE to monitor SIB1 (for example, SIB1 parameter set information, information related to SIB1 CORESET, search space information, PDCCH related parameter information, etc.), offset information between common resource blocks and SSBs (the position of the absolute SSB in the carrier is transmitted via SIB1), etc. SIB1 parameter set information is also applied to some messages used in the random access process so that the UE can access the base station after completing the cell search process. For example, the parameter set information of SIB1 can be applied to at least one of messages 1 to 4 used for the random access process.

[0080] The above-mentioned RMSI may mean SIB1 (System Information Block 1), and SIB1 is broadcast periodically (e.g., 160ms) in the cell. SIB1 includes information necessary for the UE to perform the initial random access procedure, and SIB1 is periodically transmitted through the PDSCH. In order to receive SIB1, the UE must receive parameter set information for SIB1 transmission and CORESET (Control Resource Set) information for scheduling SIB1 on the PBCH. The UE uses the SI-RNTI in the CORESET to identify the scheduling information of SIB1. The UE acquires SIB1 on the PDSCH according to the scheduling information. The remaining SIBs except SIB1 may be transmitted periodically, or the remaining SIBs may be transmitted according to the request of the UE.

[0081] Figure 6 This is a diagram for explaining a random access procedure in a wireless access technology to which this embodiment can be applied.

[0082] Reference Figure 6 , if the cell search is completed, the UE transmits a random access preamble for random access to the base station. The random access preamble is transmitted through PRACH. Specifically, the random access preamble is periodically transmitted to the base station through PRACH, and PRACH includes continuous radio resources in repeated specific time slots. Generally, when the UE makes an initial access to the cell, a contention-based random access procedure is performed, and when the UE performs random access for beam failure recovery (BFR), a non-contention-based random access procedure is performed.

[0083] The UE receives a random access response to the transmitted random access preamble. The random access response may include a random access preamble identifier (ID), an UL grant (uplink radio resources), a temporary C-RNTI (temporary cell radio network temporary identifier), and a TAC (time alignment command). Since a random access response may include random access response information for one or more UEs, a random access preamble identifier may be included to indicate the UE for which the included UL grant, temporary C-RNTI, and TAC are valid. The random access preamble identifier may be an identifier of a random access preamble received by a base station. TAC may be included as information for the UE to adjust uplink synchronization. The random access response may be indicated by a random access identifier (i.e., a random access radio network temporary identifier (RA-RNTI)) on the PDCCH.

[0084] After receiving a valid random access response, the UE processes the information included in the random access response and performs scheduled transmission to the base station. For example, the UE applies the TAC and stores the temporary C-RNTI. In addition, the UE transmits data stored in the UE's buffer or newly generated data to the base station using the UL grant. In this case, information for identifying the UE must be included in the data.

[0085] Finally, the UE receives a downlink message to resolve the contention conflict.

[0086] <NR CORESET>

[0087] The downlink control channel in NR is transmitted in a CORESET (Control Resource Set) of 1 to 3 symbols in length, and the downlink control channel transmits uplink / downlink scheduling information, SFI (Slot Format Index), TPC (Transmit Power Control) information, etc.

[0088] As mentioned above, NR introduces the concept of CORESET to ensure the flexibility of the system. CORESET (Control Resource Set) refers to the time-frequency resources used for downlink control signals. The UE can use one or more search spaces in the CORESET time-frequency resources to decode control channel candidates. The CORESET-specific QCL (quasi-co-location) assumption is configured and used for the purpose of providing information about the characteristics of the simulated beam direction and the delay spread, Doppler spread, Doppler shift and average delay that are characteristics of the existing QCL assumption.

[0089] Figure 7 A CORESET is shown.

[0090] Reference Figure 7, a CORESET can exist in various forms within the carrier bandwidth in a single time slot, and a CORESET can include up to 3 OFDM symbols in the time domain. In addition, a CORESET is defined as a multiple of six resource blocks up to the carrier bandwidth in the frequency domain.

[0091] The first CORESET is designated (eg, indicated, allocated) by the MIB as part of the initial bandwidth portion to receive additional configuration information and system information from the network. After establishing a connection with the base station, the UE may receive and configure one or more CORESET information via RRC signaling.

[0092] In this specification, frequencies, frames, subframes, resources, resource blocks, areas, frequency bands, subbands, control channels, data channels, synchronization signals, various reference signals, various signals or various messages related to NR (New Radio) may be interpreted as the meanings used currently or in the past, or may be interpreted as various meanings used in the future.

[0093] NR (New Radio)

[0094] Compared with LTE / LTE-Advanced, NR needs to be designed to not only provide improved data transmission rates, but also meet various QoS requirements for each specific and particular usage scenario. In particular, enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable low latency communication (URLLC) are defined as representative usage scenarios for NR. In order to meet the requirements of each usage scenario, NR needs to be designed to have a more flexible frame structure compared with LTE / LTE-Advanced.

[0095] Since each usage scenario has different requirements for data rate, latency, coverage, etc., a method for efficiently multiplexing radio resource units based on different parameter sets (e.g., subcarrier spacing (SCS), subframe, transmission time interval (TTI), etc.) is needed as a solution to efficiently meet the requirements according to the usage scenarios on the frequency band provided to the NR system.

[0096] To this end, i) a method of multiplexing parameter sets with different subcarrier spacing (SCS) values ​​from each other based on TDM, FDM or TDM / FDM on one NR carrier, and ii) a method of supporting one or more time units when configuring a scheduling unit in the time domain have been discussed. In this regard, in NR, the definition of a subframe is given as a type of time domain structure. In addition, as a reference parameter set for defining the duration of a corresponding subframe, a single subframe duration is defined as 14 OFDM symbols with a conventional CP overhead based on a 15kHz subcarrier spacing (SCS), the same as LTE. Therefore, the subframe of NR has a duration of 1ms. Unlike LTE, since the subframe of NR is an absolute reference duration, time slots and microslots can be defined as time units for actual UL / DL data scheduling. In this case, the number of OFDM symbols constituting a time slot, that is, the value of y, has been defined as y=14, regardless of the parameter set.

[0097] Therefore, one slot may consist of 14 symbols. Depending on the transmission direction of the corresponding slot, all symbols may be used for DL ​​transmission or UL transmission, or the symbols may be used in a configuration of DL part + slot + UL part.

[0098] In addition, a micro-slot has been defined as consisting of fewer symbols than a slot in a parameter set (or SCS), and therefore, a short time domain scheduling interval can be configured for UL / DL data transmission or reception based on a micro-slot. In addition, a long time domain scheduling interval can be configured for UL / DL data transmission or reception through slot aggregation.

[0099] In particular, in the case of transmitting or receiving delay-critical data (such as URLLC), it may be difficult to meet the delay requirements when scheduling is performed on a slot basis based on 1 ms (14 symbols) defined in a frame structure based on a parameter set with a small SCS value (e.g., 15 kHz). To this end, a micro-slot consisting of fewer OFDM symbols than a slot can be defined, so that scheduling of delay-critical data (such as URLLC) can be performed based on the micro-slot.

[0100] As described above, it is also contemplated to support parameter sets with different SCS values ​​in one NR carrier by multiplexing different SCS values ​​in a TDM and / or FDM manner, thereby scheduling data according to latency requirements based on the length of the time slot (or mini-time slot) defined by the parameter set. Figure 8 As shown, when the SCS is 60kHz, the symbol length is reduced to about 1 / 4 of the symbol length of the SCS 15kHz. Therefore, when a time slot consists of 14 OFDM symbols, the time slot length based on 15kHz is 1ms, while the time slot length based on 60kHz is reduced to about 0.25ms.

[0101] Therefore, since different SCSs or TTI lengths different from each other are defined in NR, a technology that meets the requirements of each of URLLC and eMBB has been developed.

[0102] Wider bandwidth operation

[0103] A typical LTE system supports scalable bandwidth operation for any LTE CC (component carrier). That is, depending on the frequency deployment scenario, an LTE provider can configure a bandwidth of 1.4 MHz to 20 MHz when configuring a single LTE CC, and a conventional LTE UE supports a transmission / reception capability of 20 MHz bandwidth for a single LTE CC.

[0104] However, NR is designed to support NR UEs with different transmission / reception bandwidth capabilities on a single wideband NR CC. Therefore, it is necessary to configure one or more bandwidth parts (BWPs) including subdivided bandwidths for one NR CC, such as Fig. 9 As shown, flexible and wider bandwidth operation is supported by configuring and activating different bandwidth parts for each UE.

[0105] Specifically, in NR, one or more bandwidth parts can be configured by a single service cell configured for the UE, and the UE is defined as activating one downlink (DL) bandwidth part and one uplink (UL) bandwidth part to use for uplink / downlink data transmission / reception in the corresponding service cell. In addition, in the case where multiple service cells are configured for the UE (i.e., the UE to which CA is applied), the UE is also defined as activating one downlink bandwidth part and / or one uplink bandwidth part in each service cell to use for uplink / downlink data transmission / reception by utilizing the radio resources of the corresponding service cell.

[0106] Specifically, the initial bandwidth part of the UE's initial access process can be defined in the serving cell; one or more UE-specific bandwidth parts can be configured for each UE through dedicated RRC signaling and a default bandwidth part for fallback operation can be defined for each UE.

[0107] The simultaneous activation and use of multiple downlink and / or uplink bandwidth parts may be defined depending on the capabilities of the UE and the configuration of the bandwidth parts in the serving cell. However, NR rel-15 defines the activation and use of only one downlink (DL) bandwidth part and one uplink (UL) bandwidth part at a time.

[0108] A method for transmitting an uplink in a wireless network is described in detail below with reference to related drawings.

[0109] Fig.10 1000 is a diagram illustrating a process in which a UE performs uplink transmission in a full-duplex communication mode according to an embodiment.

[0110] Reference Fig.10 , the UE may determine the format of the symbol as any one of a downlink symbol, an uplink symbol, and a flexible symbol based on time division duplex (TDD) configuration information received from the base station (S1010).

[0111] Time division duplex (TDD) divides time domain radio resources into downlink time slots and uplink time slots and uses them, and the UE can receive TDD configuration information from the base station to determine the format of the symbol. In this case, the TDD configuration information may include configuration information about the time slot format and configuration information for determining the symbol format in the time slot, and the corresponding information may be received through higher layer signaling or L1 signaling.

[0112] In other words, the UE may receive TDD configuration information for uplink-downlink (UL-DL) time slot configuration from the base station. In this case, the corresponding time slot configuration may be configured per cell through higher layer signaling (e.g., cell-specific RRC signaling). In other words, the pattern of DL symbols, UL symbols, and flexible symbols for a predetermined period may be configured through the RRC message 'tdd-UL-DL-ConfigurationCommon' for the corresponding UL-DL time slot configuration.

[0113] In addition, the UE may also receive an RRC message 'tdd-UL-DL-ConfigurationDedicated' through UE-specific RRC signaling. Among the symbols configured through the above 'tdd-UL-DL-ConfigurationCommon', only the flexible symbols may be reconfigured as UL symbols, DL symbols or flexible symbols through 'tdd-UL-DL-ConfigurationDedicated'.

[0114] Alternatively, the UE may receive an indication of a dynamic slot format via a UE group common PDCCH. In this case, the UE may dynamically receive the slot format via DCI format 2_0.

[0115] Based on at least one of the above information, the UE can determine each symbol as a DL, UL or flexible symbol relative to the time resources to be applied to the TDD scheme. In other words, based on the above cell-specific or UE group common UL / DL time slot / symbol configuration, UE-specific downlink time domain resource allocation for any UE is performed in the corresponding DL time slot / symbol, and UE-specific uplink time domain resource allocation for any UE is performed in the UL time slot / symbol.

[0116] Return to reference Fig.10 , the UE may receive configuration information of uplink subbands and downlink subbands for full-duplex communication (S1020).

[0117] The configuration information about the full-duplex communication mode may include information for transmitting / receiving data in the full-duplex communication mode between the UE and the base station. For example, the configuration information about the full-duplex communication mode may include configuration information for full-duplex communication, such as information about a predetermined frequency band including a plurality of resource blocks used in the full-duplex communication mode.

[0118] According to an example, when the base station supports full-duplex communication based on non-overlapping subbands, a specific frequency resource in the same symbol in the TDD carrier is used for downlink transmission, and another frequency resource is used for uplink reception. In other words, the subband can be configured as an arbitrary frequency resource to support a transmission direction different from the DL, UL or flexible transmission direction set by the above-mentioned TDD configuration information.

[0119] In other words, some frequency resources can be used for uplink transmission of the UE in any DL time slot or DL ​​symbol, or can be used for downlink / uplink conversion like flexible symbols. Alternatively, some frequency resources in any UL time slot or UL symbol can be configured for downlink transmission of the base station. Therefore, a UL full-duplex subband (FDSB) in any DL time slot / symbol, or a DL FDSB in a UL time slot / symbol can be configured. However, the term "FDSB" is for ease of description, the scope of the present disclosure is not limited thereto, and it can be referred to by other terms as needed.

[0120] When an uplink subband is configured in a symbol configured as a downlink symbol, that is, when the above-mentioned UL FDSB is configured, the corresponding symbol may be referred to as a reconfiguration symbol. However, the term "reconfiguration symbol" is for convenience of description, the scope of the present disclosure is not limited thereto, and it may be referred to by other terms as needed, such as a mixed link (ML) symbol or a subband full-duplex (SBFD) symbol.

[0121] The UE may receive configuration information for a UL FDSB configured in a downlink symbol or a DL FDSB configured in an uplink symbol. In this case, the UE may determine the corresponding symbol as a reconfiguration symbol.

[0122] Return to reference Fig.10 The UE may receive (S1030) additional information for uplink transmission in a reconfigured symbol configured with an uplink subband among symbols whose format has been determined as a downlink symbol, and transmit (S1040) an uplink in the reconfigured symbol based on the additional information for uplink transmission in the reconfigured symbol.

[0123] According to one example, the UE may receive information about a bandwidth part (BWP, also referred to as an SBFD bandwidth part hereinafter) for uplink transmission or downlink reception of the UE in a reconfigured symbol including an uplink subband configured in the base station. In this case, the SBFD bandwidth part may be further subdivided into SBFD DL BWP and SBFD ULBWP.

[0124] The SBFD bandwidth part may include PUSCH configuration information and PUCCH resource set configuration information for uplink transmission of the UE in the reconfiguration symbol. In addition, the SBFD bandwidth part may include CORESET configuration information and PDSCH configuration information for downlink reception of the UE in the reconfiguration symbol. Alternatively, the SBFD UL BWP may include PUSCH configuration information and PUCCH resource set configuration information for uplink transmission of the UE. Alternatively, the SBFD DL BWP may include PDSCH configuration information and CORESET configuration information for downlink reception of the UE.

[0125] However, the frequency resources used for uplink transmission can be configured to be limited to the frequency domain of the uplink subband. In other words, the PUCCH resource set configuration information for uplink control information (UCI) transmission / reception within the SBFD bandwidth portion can be limited to be performed in the uplink frequency domain according to the configuration of the full-duplex communication subband (FDSB).

[0126] For example, in the reconfiguration symbol, the uplink FDSB can be configured, and the SBFD bandwidth part can be configured to include the uplink FDSB, the guard band, and the frequency band operated as a downlink. In this case, the PUCCH resource set for the corresponding SBFD bandwidth part can be configured only within the frequency band of the corresponding uplink FDSB, and the CORESET configuration can be restricted to be performed only within the frequency band configured as the downlink, excluding the corresponding uplink FDSB and the guard band. Similarly, as a PUSCH resource allocation in the reconfiguration symbol, frequency domain resource allocation can be performed based on the activated SBFD bandwidth part. In this case, according to the frequency band configuration of the FDSB in the corresponding reconfiguration symbol, the frequency resources of the PUSCH can be allocated within the uplink FDSB, and the PDSCH frequency resources can be restricted to be allocated within the downlink frequency band.

[0127] For example, the additional information for uplink transmission in the reconfiguration symbol may be determined based on PUSCH scheduling information or PDSCH scheduling information in a downlink control information format (DCI format) received from the base station. The uplink transmission of the UE in the reconfiguration symbol may be indicated by the transmission of scheduling control information by the base station.

[0128] For example, it is assumed that a PUSCH transmission symbol indicated by a DCI for PUSCH scheduling (such as DCI formats 0_0, 0_1, 0_2, etc. received by the UE) includes a reconfiguration symbol. In other words, when a PUSCH transmission symbol according to time domain resource allocation information about a downlink control information format including PUSCH scheduling information is a reconfiguration symbol, the UE may transmit PUSCH in the reconfiguration symbol based on the priority of the PUSCH scheduling information over the TDD configuration information. Specifically, the UE may perform PUSCH transmission through the PUSCH transmission resource allocated by the DCI, regardless of the UL or DL ​​configuration information of the corresponding symbol performed by the above-mentioned 'tdd-UL-DL-ConfigurationCommon' or 'tdd-UL-DL-ConfigurationDedicated' or otherwise by the UL or DL ​​indication information performed by the DCI format 2_0.

[0129] As another example, it is assumed that a HARQ feedback information transmission symbol according to a PDSCH-to-HARQ_feedback timing indicator included in a DCI for PDSCH scheduling (DCI formats 1_0, 1_1, 1_2, etc. received by the UE) is a reconfiguration symbol. In other words, when a HARQ feedback information transmission symbol according to a PDSCH-to-HARQ_feedback timing indicator of a downlink control information format including PUSCH scheduling information is a reconfiguration symbol, the UE may transmit the HARQ feedback information in the reconfiguration symbol based on the priority of the PUSCH scheduling information over the TDD configuration information.

[0130] In addition, according to one example, additional information for uplink transmission in the reconfiguration symbol can be determined based on the configuration and activation of the bandwidth part or uplink bandwidth part configured for the reconfiguration symbol. In other words, the uplink transmission operation of the UE in the reconfiguration symbol can be configured or indicated by the configuration and activation of the separate SBFD bandwidth part.

[0131] When the SBFD UL BWP is configured for the UE or the SBFD UL BWP is configured and indicated to be activated, the uplink transmission operation in the reconfiguration symbol can be configured to be performed. Conversely, when the SBFD DL BWP is configured for the UE or the SBFD DL BWP is configured and indicated to be activated, the downlink reception operation in the reconfiguration symbol can be configured to be performed. In this case, the SBFD UL BWP or the SBFD DL BWP can be configured separately from the existing downlink bandwidth part (DL BWP) or uplink bandwidth part (UL BWP).

[0132] In addition, the activation indication information about the SBFD UL BWP or SBFD DL BWP can be indicated by the DCI format used for PDSCH scheduling or PUSCH scheduling. In this case, the PDSCH scheduling or PUSCH scheduling DCI format can be configured to include an information area for activation indication of a separate SBFD UL BWP or SBFD DL BWP in addition to the activation indication information area for DL ​​BWP or UL BWP (such as an existing bandwidth part indicator). Alternatively, it can be configured to indicate the activation of the SBFD DL BWP or SBFD UL BWP through the existing bandwidth part indicator.

[0133] According to an example, when the frequency domain resource allocation information about the downlink control information format including the PUSCH scheduling information includes frequency resources outside the frequency domain of the uplink subband, the UE can transmit the PUSCH by rate matching or puncturing for the PUSCH transmission of the frequency resources outside the uplink subband frequency domain. For example, it is assumed that the frequency resource allocation information for PUSCH transmission includes frequency resources outside the uplink subband boundary, such as frequency resources belonging to the downlink subband or the guard band in the reconfiguration symbol. In this case, when generating a PUSCH signal according to the corresponding PUSCH scheduling information and mapping it to the frequency resource, the UE can map to the frequency resource based on the frequency resource belonging to the uplink subband by rate matching or puncturing the frequency resource that is not the corresponding uplink subband.

[0134] As an example, when resource allocation type 0 is applied to PUSCH transmission, if some of the one or more resource block groups allocated for PUSCH transmission overlap at least partially with the frequency domain of the uplink subband, the UE may transmit PUSCH only for physical resource blocks belonging to the frequency domain of the uplink subband among the physical resource blocks (PRBs) constituting the resource block group. For example, in the case where the RBG partially overlaps with the uplink subband, the UE may perform frequency mapping on the PUSCH only through the frequency resources in the uplink subband boundary among the frequency resources of the corresponding RBG. In other words, frequency mapping may be performed only on one or more PRBs in the uplink subband boundary among the PRBs constituting the corresponding RBG.

[0135] In other words, when the frequency domain resource allocation information based on resource allocation type 0 can be indicated by a DCI format including PUSCH scheduling information (such as DCI format 0_0, 0_1, 0_2), and the corresponding PUSCH transmission includes a reconfiguration symbol, among the allocated (multiple) RGBs, the UE can only determine the PRBs in the frequency domain belonging to the uplink subband among the RBGs that partially overlap with the uplink subband, and all PRBs belonging to all RBGs that completely overlap with the uplink subband as available PRB resources for the corresponding PUSCH transmission. Therefore, the UE can perform PUSCH transmission based on the resource elements (RE) in the corresponding available PRB resources. In this case, as described above, puncturing or rate matching can be applied to map the PUSCH transmission signal through the REs of the available PRB resources.

[0136] The case based on resource allocation type 0 has been described above, but this is an example and the present disclosure is not limited thereto. The description of the present disclosure can be substantially equally applied to other resource allocation types.

[0137] Furthermore, from the perspective of base station PDSCH transmission and UE PDSCH reception including reconfiguration symbols, the content of the present disclosure can be substantially equally applied as long as it does not contradict the technical spirit.

[0138] According to this, a method and apparatus for efficiently transmitting uplink in a time slot or symbol to which full-duplex communication is applied can be provided.

[0139] Fig.11 1 is a diagram showing a process 1100 for a base station to perform uplink reception in a full-duplex communication mode according to an embodiment. Fig.10 The description is made to avoid redundant description, in which case the omitted content can be applied to the transmission UE in substantially the same manner as long as it does not violate the technical spirit of the present invention.

[0140] Reference Fig.11 , the base station may transmit time division duplex (TDD) uplink (UL)-downlink (DL) configuration information (S1110).

[0141] The base station may transmit TDD configuration information for determining the symbol format to the UE. In this case, the TDD configuration information may include configuration information about the slot format and configuration information for determining the symbol format in the slot, and the corresponding information may be transmitted through higher layer signaling or L1 signaling.

[0142] In other words, the base station may transmit TDD configuration information for uplink-downlink (UL-DL) time slot configuration to the UE. In this case, the corresponding time slot configuration may be configured per cell through higher layer signaling (e.g., cell-specific RRC signaling). In other words, the pattern of DL symbols, UL symbols, and flexible symbols for a predetermined period may be configured through the RRC message 'tdd-UL-DL-ConfigurationCommon' for the corresponding UL-DL time slot configuration.

[0143] In addition, the base station may also transmit an RRC message 'tdd-UL-DL-ConfigurationDedicated' through UE-specific RRC signaling. Among the symbols configured through the above 'tdd-UL-DL-ConfigurationCommon', only flexible symbols may be reconfigured as UL symbols, DL symbols or flexible symbols through 'tdd-UL-DL-ConfigurationDedicated'.

[0144] Alternatively, the base station may indicate the dynamic slot format to the UE via a UE group common PDCCH. In this case, the base station may dynamically indicate the slot format via DCI format 2_0.

[0145] Return to reference Fig.11 , the base station may transmit configuration information of uplink subbands and downlink subbands for full-duplex communication (S1120).

[0146] The configuration information about the full-duplex communication mode may include information for transmitting / receiving data in the full-duplex communication mode between the UE and the base station. According to one example, when the base station supports full-duplex communication based on non-overlapping subbands, a specific frequency resource in the same symbol in the TDD carrier is used for downlink transmission, and another frequency resource is used for uplink reception. In other words, the subband can be configured as an arbitrary frequency resource to support a transmission direction different from the DL, UL or flexible transmission direction set by the above-mentioned TDD configuration information.

[0147] In other words, some frequency resources can be used for uplink transmission of UE in any DL time slot or DL ​​symbol, or can be used for downlink / uplink conversion like flexible symbols. Alternatively, some frequency resources in any UL time slot or UL symbol can be configured for downlink transmission of base station. Therefore, UL full duplex subband (FDSB) in any DL time slot / symbol, or DL ​​FDSB in UL time slot / symbol can be configured.

[0148] When an uplink subband is configured in a symbol configured as a downlink symbol, that is, when the above-mentioned UL FDSB is configured, the corresponding symbol may be referred to as a reconfiguration symbol. The base station may transmit configuration information for the UL FDSB configured in a downlink symbol or the DL FDSB configured in an uplink symbol to the UE.

[0149] Return to reference Fig.11 The base station may transmit (S1130) additional information for uplink reception in a reconfiguration symbol configured with an uplink subband among symbols whose formats have been determined as downlink symbols based on the DD UL-DL configuration information, and receive (S1140) an uplink in the reconfiguration symbol based on the additional information for uplink reception in the reconfiguration symbol.

[0150] According to an example, the base station may transmit to the UE information about a bandwidth portion used for uplink transmission or downlink reception of the UE in the reconfigured symbols including the uplink subband. In this case, the SBFD bandwidth portion may be further subdivided into SBFD DL BWP and SBFD UL BWP.

[0151] The SBFD bandwidth part may include PUSCH configuration information and PUCCH resource set configuration information for uplink transmission of the UE in the reconfiguration symbol. In addition, the SBFD bandwidth part may include CORESET configuration information and PDSCH configuration information for downlink reception of the UE in the reconfiguration symbol. Alternatively, the SBFD UL BWP may include PUSCH configuration information and PUCCH resource set configuration information for uplink transmission of the UE. Alternatively, the SBFD DL BWP may include PDSCH configuration information and CORESET configuration information for downlink reception of the UE.

[0152] However, the frequency resources used for uplink transmission can be configured to be limited to the frequency domain of the uplink subband. In other words, the PUCCH resource set configuration information for uplink control information (UCI) transmission / reception within the SBFD bandwidth portion can be limited to be performed in the uplink frequency domain according to the configuration of the full-duplex communication subband (FDSB).

[0153] For example, in the reconfiguration symbol, the uplink FDSB can be configured, and the SBFD bandwidth part can be configured to include the uplink FDSB, the guard band, and the frequency band operated as a downlink. In this case, the PUCCH resource set for the corresponding SBFD bandwidth part can be configured only within the frequency band of the corresponding uplink FDSB, and the CORESET configuration can be limited to be performed only within the frequency band configured as the downlink, excluding the corresponding uplink FDSB and the guard band. Similarly, as a PUSCH resource allocation in the reconfiguration symbol, frequency domain resource allocation can be performed based on the activated SBFD bandwidth part. In this case, according to the frequency band configuration of the FDSB in the corresponding reconfiguration symbol, the frequency resources of the PUSCH can be allocated within the uplink FDSB, and the PDSCH frequency resources can be limited to be allocated within the downlink frequency band.

[0154] For example, additional information for uplink transmission in the reconfiguration symbol may be determined based on PUSCH scheduling information or PDSCH scheduling information in a downlink control information format (DCI format) transmitted from the base station. Uplink transmission of the UE in the reconfiguration symbol may be indicated by transmission of scheduling control information by the base station.

[0155] For example, it is assumed that a PUSCH transmission symbol indicated by a DCI for PUSCH scheduling (such as DCI formats 0_0, 0_1, 0_2, etc.) includes a reconfiguration symbol. In other words, when a PUSCH transmission symbol according to time domain resource allocation information about a downlink control information format including PUSCH scheduling information is a reconfiguration symbol, the base station may receive the PUSCH in the reconfiguration symbol based on the priority of the PUSCH scheduling information over the TDD configuration information.

[0156] As another example, it is assumed that a HARQ feedback information transmission symbol according to a PDSCH-to-HARQ_feedback timing indicator included in a DCI for PDSCH scheduling (such as DCI formats 1_0, 1_1, 1_2, etc. received by a UE) is a reconfiguration symbol. In other words, when a HARQ feedback information transmission symbol according to a PDSCH-to-HARQ_feedback timing indicator of a downlink control information format including PUSCH scheduling information is a reconfiguration symbol, the base station may receive the HARQ feedback information in the reconfiguration symbol based on the priority of the PUSCH scheduling information over the TDD configuration information.

[0157] In addition, according to one example, additional information for uplink transmission in the reconfiguration symbol can be determined based on the configuration and activation of the bandwidth part or uplink bandwidth part configured for the reconfiguration symbol. In other words, the uplink transmission operation of the UE in the reconfiguration symbol can be configured or indicated by the configuration and activation of the separate SBFD bandwidth part.

[0158] When the SBFD UL BWP is configured for the UE or the SBFD UL BWP is configured and indicated to be activated, the uplink transmission operation in the reconfiguration symbol can be configured to be performed. Conversely, when the SBFD DL BWP is configured for the UE or the SBFD DLBWP is configured and indicated to be activated, the downlink reception operation in the reconfiguration symbol can be configured to be performed. In this case, the SBFD UL BWP or the SBFD DL BWP can be configured separately from the existing downlink bandwidth part (DL BWP) or uplink bandwidth part (UL BWP).

[0159] In addition, the base station may indicate activation indication information about the SBFD ULBWP or SBFD DL BWP through a DCI format for PDSCH scheduling or PUSCH scheduling. In this case, the PDSCH scheduling or PUSCH scheduling DCI format may be configured to include an information area for activation indication of a separate SBFD UL BWP or SBFD DL BWP in addition to an activation indication information area for DL ​​BWP or UL BWP (such as an existing bandwidth part indicator). Alternatively, it may be configured to indicate activation of the SBFD DL BWP or SBFD UL BWP through an existing bandwidth part indicator.

[0160] According to one example, when frequency domain resource allocation information about the downlink control information format including PUSCH scheduling information includes frequency resources outside the frequency domain of the uplink subband, the base station can receive a punctured or rate-matched PUSCH for the frequency resources outside the frequency domain of the uplink subband.

[0161] As an example, when resource allocation type 0 is applied to PUSCH transmission, if some of the one or more resource block groups allocated for PUSCH transmission at least partially overlap with the frequency domain of the uplink subband, the base station may receive PUSCH only for physical resource blocks belonging to the frequency domain of the uplink subband among the physical resource blocks (PRBs) constituting the resource block group. For example, in the case where the RBG partially overlaps with the uplink subband, the UE may perform frequency mapping on the PUSCH only through the frequency resources in the uplink subband boundary among the frequency resources of the corresponding RBG.

[0162] According to this, a method and apparatus for efficiently receiving an uplink in a time slot or symbol to which full-duplex communication is applied can be provided.

[0163] Each embodiment related to a method for transmitting uplink in a wireless network is described in detail below with reference to related drawings.

[0164] The present disclosure proposes a method for supporting full-duplex communication in a wireless mobile communication system. Specifically, the present disclosure proposes full-duplex communication between heterogeneous radio access technologies (RATs) and full-duplex communication between homogeneous RATs, and proposes an uplink transmission / reception method supporting the full-duplex communication. The present disclosure proposes a bandwidth part (BWP) configuration for supporting full-duplex communication in a wireless mobile communication system, and a transmission / reception method for uplink / downlink wireless signals and wireless channels by a base station and a UE according to the configuration.

[0165] Time division duplex (TDD) is a duplex method widely used in commercial new radio (NR), i.e., 5G mobile communication systems. In TDD, time domain radio resources are divided into downlink time slots and uplink time slots, and downlink time slots are generally distributed at a higher ratio than uplink time slots according to the distribution ratio of uplink traffic and 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 these problems.

[0166] Specifically, full-duplex communication is a technology in which a gNB (i.e., base station) performs DL transmission and UL reception simultaneously in the same wireless resource. The UE side can also perform DL reception and UL transmission simultaneously. In other words, both the base station and the UE can support full-duplex. However, unlike the base station, which is structurally easy to eliminate self-interference, in the UE, the DL reception performance is easily affected by the self-interference of the UL transmission signal. Therefore, it is generally believed that the base station operates in full-duplex communication and the UE operates in half-duplex communication. In addition, the sub-band non-overlapping full-duplex method can be mainly considered, in which, in order to reduce the impact of self-interference, the base station performs DL transmission and UL reception simultaneously, but uses identified frequency resources to perform transmission and reception instead of using the same resources.

[0167] As described above, various full-duplex communication application scenarios are being considered based on the capabilities of the base station and UE, frequency bands, and frequency interference issues with other operators.

[0168] The present disclosure proposes a method for configuring a BWP and transmitting / receiving radio channels (e.g., PDCCH / PDSCH and PUSCH / PUCCH) and uplink / downlink radio signals (DM-RS, CSI-RS, SRS, and PSS / SSS) of base stations and UEs when any base station / network supports sub-band non-overlapping full-duplex. However, the description of the present disclosure can be applied to various other full-duplex application scenarios in a substantially identical manner. For example, a full-duplex application scenario may include full-duplex operation in a non-paired spectrum and full-duplex operation in a downlink (DL) band or uplink (UL) band of a paired spectrum. In addition, as described above, the description of the present disclosure can be applied substantially identically to a scenario in which sub-band non-overlapping full-duplex or pure full-duplex (i.e., DL transmission and UL reception are performed simultaneously in the same frequency resource) is supported only on the base station side and half-duplex operation is performed in the UE. In addition, even when not only the base station but also the UE supports sub-band non-overlapping full-duplex or pure full-duplex, the description of the present disclosure can be applied substantially identically.

[0169] According to the BWP configuration defined in the conventional system and the wireless signal transmission / reception method according thereto, for any UE, any base station / network configures a DL BWP for downlink signal transmission and a ULBWP for uplink signal reception. Specifically, any UE can configure up to four DL BWPs (including the initial DL BWP) from the base station for downlink signal reception, and similarly, configure up to four UL BWPs (including the initial UL BWP) for uplink signal transmission. Each DL BWP and UL BWP configuration information includes index information for identifying each BWP and frequency allocation information based on subcarrier spacing (SCS), cyclic prefix (CP) and common resource block (CRB). In addition, DL BWP and UL BWP with the same index configured for any UE in a non-paired spectrum (i.e., TDD frequency) are restricted to have the same center frequency. The base station activates one DLBWP and one UL BWP among the DL BWP and UL BWP configured for the corresponding UE for downlink transmission or uplink reception for any UE, so as to allocate frequency resources for downlink signal transmission (e.g., CORESET or PDSCH transmission resources for PDCCH transmission) in the corresponding DL BWP, and allocate frequency resources for uplink signal reception (e.g., PUCCH resource set or PUSCH transmission resources for PUCCH reception) in the UL BWP.

[0170] Therefore, frequency resources for any UE are allocated based on the above-mentioned DL BWP and UL BWP configuration and activation.

[0171] On the other hand, for resource allocation in the time domain in non-paired spectrum, mainly, the configuration or indication of DL or UL time slots / symbols is performed specifically for the cell. In other words, the uplink-downlink (UL-DL) time slot configuration defined in the current NR is defined to be performed in units of cells through cell-specific RRC signaling. In other words, the pattern of DL symbols, UL symbols and flexible symbols for a predetermined period is configured by the RRC message 'tdd-UL-DL-ConfigurationCommon' for the corresponding UL-DL time slot configuration. In addition, only the flexible symbols configured by 'tdd-UL-DL-ConfigurationCommon' can be reallocated as UL symbols, DL symbols or flexible symbols for each UE through 'tdd-UL-DL-ConfigurationDedicated' which is UE-specific RRC signaling. Alternatively, a method for indicating a dynamic time slot format through a UE group common PDCCH is also defined. To this end, NR also supports a time slot format indication method in a dynamic form through DCI format 2_0. Therefore, according to the above-mentioned time slot configuration method, any one symbol can be configured or indicated as one of DL, UL or flexible. Fig.12 An example of setting any time slot format to DDDSU through traditional time slot configuration is shown. D is a downlink time slot, which means that all OFDM symbols constituting the corresponding time slot are set to DL. U is an uplink time slot, which means that all OFDM symbols constituting the corresponding time slot are set to UL. S is a special time slot, which means that one time slot includes flexible symbols for DL / UL conversion. In general, a special time slot can consist of a total of 14 symbols for a conventional CP, including 12 DL symbols and 2 flexible symbols. Alternatively, it can consist of 10 DL symbols, 2 flexible symbols, and 2 UL symbols. In other words, within any one TDD carrier, a symbol is set or indicated as only one of DL, UL, or flexible.

[0172] Therefore, according to the above-mentioned cell-specific or UE group common UL / DL time slot / symbol configuration, UE-specific DL period resource allocation for any UE is performed in the corresponding DL time slot / symbol, and UE-specific UL period resource allocation for any UE is performed in the UL time slot / symbol.

[0173] However, when full duplex based on subband non-overlapping is supported in any base station, one specific frequency resource can be used for DL ​​transmission and another specific frequency resource can be used for UL transmission so as to perform UL reception in the same symbol in any non-paired spectrum (i.e., any TDD carrier). Fig.13For full-duplex operation as shown, any frequency resource, i.e., a so-called full-duplex subband (FDSB), can be configured to support a Tx direction different from the transmission direction (Tx direction) configured by the time slot configuration information (i.e., DL, UL, or flexible). In other words, Fig.13 As shown, it can be defined as utilizing some frequency resources in any DL time slot or DL ​​symbol as flexible symbols for UL transmission or DL / UL conversion of UE. Alternatively, some frequency resources in any UL time slot or UL symbol can be defined as being used for DL ​​transmission of the base station. Therefore, a UL full-duplex subband (FDSB) in any DL time slot / symbol, or a DL FDSB in a UL time slot / symbol can be configured. However, the term "FDSB" is for ease of description, and the present disclosure is not limited thereto, and it can be referred to by other terms as needed.

[0174] Therefore, when FDSB is configured in any TDD spectrum, it is necessary to clearly define whether any UE is to perform DL reception operation or UL transmission operation in a corresponding symbol in any time slot or symbol including the corresponding FDSB. It is also necessary to clearly define how to define the BWP of DL resource or UL resource allocation based on this.

[0175] Therefore, the present disclosure proposes a Tx / Rx configuration / indication method of a UE and a BWP configuration / indication method according to the method in any time slot or symbol including FDSB (in the present disclosure, it is referred to as a hybrid link (ML) time slot or symbol, but the scope of the present disclosure is not limited to this term).

[0176] ML-specific BWP configuration

[0177] It can be defined that, in addition to the existing DL / UL BWP, the base station configures a separate ML BWP for frequency resource allocation in an ML symbol or time slot including the FDSB. In this case, the ML BWP can be configured in the form of a DL / UL common BWP, regardless of whether it is Rx (i.e., DL) or Tx (i.e., UL) on the UE side. In other words, any base station can configure one or more ML BWPs for DL ​​transmission resource allocation or UL reception resource allocation for any UE in an ML symbol or time slot including the FDSB. In addition, it can be defined that the base station activates one ML BWP for DL ​​transmission or UL reception resource allocation for the corresponding UE in any ML time slot or symbol. Therefore, any one ML BWP configuration information can include configuration information for DL ​​reception (such as CORESET configuration information) and configuration information for UL transmission (such as PUCCH resource set configuration information). However, the CORESET configuration information for PDCCH transmission / reception and the PUCCH resource set configuration information for uplink control information (UCI) transmission / reception in the corresponding MLBWP can be restricted to be implemented in the DL frequency domain and the UL frequency domain, respectively, according to the FDSB configuration. For example, as Fig.13 As shown, in any DL slot / symbol, UL FDSB is configured, and the ML BWP for any UE may be configured to include a frequency band as DL operation according to other existing configurations, and a guard band. In this case, the PUCCH resource set for the corresponding ML BWP may be configured only within the frequency band of the corresponding UL FDSB, and the CORESET configuration may be limited to be performed only within the frequency band configured as the existing DL, excluding the corresponding UL FDSB and the guard band. Similarly, as a PDSCH or PUSCH resource allocation in an ML symbol, frequency domain resource allocation may be performed based on the activated ML BWP. In this case, according to the frequency band configuration of the FDSB in the corresponding ML slot or symbol, the frequency resources of the PUSCH may be allocated within the UL FDSB, and the PDSCH frequency resources may be limited to be allocated within the DL band. If any PUSCH frequency resource allocation includes a frequency resource that is not a UL FDSB, the frequency resource that is not a UL FDSB is punctured or rate matched. Likewise, when any PDSCH frequency resource allocation includes a frequency resource that is not a DL frequency band (ie, the above-mentioned guard band or UL FDSB), the corresponding frequency resource is defined to be punctured or rate matched.

[0178] As another example of separately configuring ML-specific BWPs, it is possible to define ML for DL ​​transmission separately configured in corresponding ML symbols / time slots. DL BWP and ML for UL transmission UL BWP. In this case, MLDL BWP can be configured in the DL band of the entire band in the ML symbol, and ML UL BWP can be configured in the UL band in the entire band of ML symbols. Fig.13 As shown, when the UL FDSB is configured in a symbol / time slot that is configured as DL through the conventional time slot configuration, the ML in the corresponding ML symbol may be configured. DL BWP and ML UL BWP. In this case, the corresponding ML can be defined DL The BWP may be configured in a frequency band configured as DL according to the existing time slot configuration, excluding the UL FDSB and the guard band, and the ML UL BWP can be configured in UL FDSB. DL BWP and ML UL When BWP is configured separately, the corresponding ML DL The BWP configuration information may include CORESET configuration information for PDCCH reception, and the ML UL The BWP may include PUCCH resource set configuration information.

[0179] As another method of separately configuring the ML-specific BWP, a BWP configuration for performing only the reverse transmission direction (reverse Tx direction) in the corresponding FDSB may be defined. In other words, when the UL FDSB is configured in a symbol configured as DL by the conventional slot configuration, an ML for UL transmission only in the corresponding UL FDSB may be defined in addition to the existing DL BWP and UL BWP for any UE. UL Alternatively, when a DL FDSB is configured in a symbol configured as UL by a conventional slot configuration, an ML for DL ​​reception only in the corresponding DL FDSB may be defined in addition to the existing DL BWP and UL BWP for any UE. DLThe BWP is configured additionally. In this case, resource allocation for the Tx direction according to the legacy time slot configuration in the ML symbol may be defined as being performed based on the activated legacy BWP configuration, and resource allocation based on the reverse Tx direction through the FDSB in the corresponding ML symbol may be defined as being performed based on the corresponding ML-specific BWP. For example, when any UL FDSB configuration is performed in a DL symbol according to the legacy time slot configuration as described above, for any UE, resource allocation (e.g., PDSCH resource allocation or CORESET resource allocation for PDCCH monitoring) for DL ​​reception (which is the Tx direction according to the legacy time slot configuration) in the ML time slot including the corresponding UL FDSB is performed based on the DL BWP configuration activated according to the existing DL BWP configuration information in the corresponding UE. On the other hand, a separate ML for UL transmission as the reverse Tx direction may be defined as being configured and activated through the UL FDSB in the corresponding ML symbol. UL BWP, so that the PUSCH or PUCCH transmission resources of the UL FDSB through the corresponding ML symbol are based on the activated ML UL Even in this case, the corresponding ML DL The BWP configuration information may also include CORESET configuration information for PDCCH reception, and ML UL The BWP may include PUCCH resource set configuration information.

[0180] In this case, in the ML symbol, any UE can dynamically indicate DL or UL transmission / reception. For example, in the ML symbol, the Tx direction of the UE in the corresponding ML symbol can be determined by the DL or UL transmission resource allocation of the DCI. In other words, any UE supports both PDSCH / PDCCH reception and PUSCH / PUCCH transmission in the ML symbol according to the indication of the base station. Alternatively, it can be defined that the Tx direction in the corresponding ML symbol is derived according to whether an ML-specific BWP is configured. For example, it can be defined that when no ML-specific BWP configuration is performed for any UE, the UE follows the DL / UL configuration according to the traditional time slot configuration in the ML symbol, and when the wireless signal transmission / reception is requested in all or some ML symbols by a Tx direction different from the traditional time slot configuration (i.e., FDSB), the base station configures and activates one or more ML-specific BWPs according to the above scheme.

[0181] Therefore, when MLBWP configuration for DL / UL transmission / reception is performed in an ML slot or ML symbol in which FDSB configuration is performed, the payload size of the DCI format including PDSCH or PUSCH scheduling information in the corresponding ML slot / symbol may be determined according to the corresponding ML BWP or ML DL BWP and MLUL The size of the BWP (i.e., the number of PRBs) varies. Therefore, it can be defined that the size alignment between the DCI format for PUSCH scheduling and the DCI format for PDSCH scheduling by padding or truncation achieves the corresponding DCI size (including ML BWP or ML DL BWP and ML UL In other words, when performing DCI size alignment between DCI format 0_0 and DCI format 1_0, DCI size alignment between DCI format 0_1 ​​and DCI format 1_1, and DCI size alignment between DCI format 0_2 and DCI format 1_2, according to ML DL BWP and ML UL Size alignment between DCI formats of the sizes of BWP or activated ML BWP and activated DL BWP and UL BWP is performed.

[0182] In addition, when a corresponding ML-specific BWP configuration is performed and it includes a BWP indicator information area of ​​any PDSCH or PUSCH scheduling DCI format, when the corresponding BWP indicator is configured by the base station and understood by the UE, if the PUSCH resource allocation through the PUSCH scheduling DCI format is performed in ML symbols, the corresponding BWP indicator can be defined to indicate the ML BWP ID or ML UL BWP ID, and when PUSCH resource allocation is performed in legacy UL symbols, it indicates the legacy UL BWP ID. Similarly, when PDSCH resource allocation by any PDSCH scheduling DCI format is performed in ML symbols, it can be defined to indicate ML BWP or ML DL BWP ID, and when PDSCH resource allocation is performed in legacy DL symbols, it can be defined to represent the legacy DL BWP ID. Alternatively, each DL / UL DCI format can be defined to include an additional information area for indicating whether the corresponding BWP indicator is a legacy DL / UL BWP indicator or ML-specific BWP indicator information.

[0183] In addition, for the unpaired spectrum, it can be defined as DL BWP and ML UL Linking is established between BWPs or between DLBWPs of the same index and UL BWPs and ML BWPs. In other words, it can be defined that any UE does not expect ML DL BWP and ML ULThe center frequencies between BWPs or between DL BWP and UL BWP and ML BWP of the same index are set to be different. Alternatively, the configuration and activation of the ML-specific BWP may be defined independently of the link between the legacy DL BWP and UL BWP.

[0184] Hereinafter, a transmission / reception direction configuration / indication method of a UE in a subband full duplex (SBFD) time slot or SBFD symbol (i.e., the above-mentioned ML time slot or ML symbol) configured with UL subband full duplex (i.e., UL SBFD) according to the above-mentioned method and a PUSCH and PUCCH transmission method of the UE according to the method, and a PUSCH and PUCCH reception method of the base station according to the method are described in detail. Here, the term 'SBFD' is an example, and the present disclosure is not limited thereto, and the symbol may be referred to by other terms, such as a reconfiguration symbol.

[0185] The base station may configure a SBFD BWP for uplink transmission or downlink reception of any UE in a SBFD symbol or SBFD time slot including a UL subband. The SBFD BWP may be further subdivided into a SBFD DL BWP and a SBFD ULBWP. The SBFD BWP configured for any UE may include PUSCH configuration information and PUCCH resource set configuration information for uplink transmission of the UE in the SBFD symbol / time slot. In addition, the SBFD BWP configured for any UE may include CORESET configuration information and PDSCH configuration information for downlink reception of the corresponding UE in the SBFD symbol / time slot. Alternatively, the SBFD UL BWP configured for any UE may include PUSCH configuration information and PUCCH resource set configuration information for uplink transmission of the UE. Alternatively, the SBFD DL BWP configured for any UE may include PDSCH configuration information and CORESET configuration information for downlink reception of the UE.

[0186] Whether the UE performs uplink transmission or downlink reception in a SBFD symbol or SBFD time slot can be indicated by the transmission of scheduling control information of the base station. As an example, when the PUSCH transmission time slot or symbol indicated by the time domain resource allocation (TDRA) included in the DCI format for PUSCH scheduling transmitted to any UE (e.g., DCI format 0_0, 0_1, or 0_2) includes a SBFD time slot or SBFD symbol, the corresponding UE performs PUSCH transmission through the PUSCH transmission resources allocated by the corresponding DCI format, regardless of the traditional time slot configuration in the corresponding SBFD time slot or SBFD symbol. In other words, the UE can perform PUSCH transmission through the PUSCH transmission resources allocated by the DCI format, regardless of the UL or DL ​​configuration information of the corresponding time slot or symbol performed through the above-mentioned 'tdd-UL-DL-ConfigurationCommon' or 'tdd-UL-DL-ConfigurationDedicated' or the UL or DL ​​indication information performed separately through DCI format 2_0. As another example, when the UCI transmission slot or symbol indicated by the PDSCH-to-HARQ_feedback timing indicator included in the DCI format for PDSCH scheduling transmitted for any UE (e.g., DCI format 1_0, 1_1, or 1_2) includes an SBFD slot or SBFD symbol, the corresponding UE performs UCI transmission (e.g., PUCCH transmission or PUSCH transmission) regardless of the configuration made by the traditional slot configuration in the indicated SBFD slot or SBFD symbol.

[0187] Alternatively, as described above, whether the UE performs UL transmission or DL ​​reception operation can be configured or indicated by separate SBFD BWP configuration and activation in any SBFD time slot or SBFD symbol. As an example, when an SBFD UL BWP is configured for any UE or an SBFD UL BWP is configured and indicated to be activated, an uplink transmission operation in the SBFD symbol or SBFD time slot can be defined to be performed. Conversely, when an SBFD DL BWP is configured for the UE or an SBFD DL BWP is configured and indicated to be activated, a downlink reception operation in the SBFD symbol or SBFD time slot can be defined to be performed. In this case, the SBFD UL BWP or SBFD DL BWP is configured separately from the conventional DL BWP or UL BWP, and activation indication information about the corresponding SBFD UL BWP or SBFD DL BWP is indicated by the DCI format used for PDSCH or PUSCH scheduling. In this case, the PDSCH scheduling or PUSCH scheduling DCI format may be defined to include, in addition to the activation indication information area for the legacy DL BWP or ULBWP (i.e., the legacy bandwidth part indicator), an information area for a separate SBFD UL BWP or SBFD DL BWP activation indication, or may be defined to indicate the activation of the SBFD DLBWP or SBFD UL BWP through the legacy bandwidth part indicator.

[0188] Hereinafter, a frequency resource determination method for PUSCH transmission of a UE when frequency resource additional information for PUSCH transmission of the UE in a SBFD symbol or SBFD slot includes frequency resources outside a UL subband boundary according to the above method is described in detail.

[0189] When the frequency resource allocation information for PUSCH transmission according to PUSCH scheduling information in a SBFD symbol or SBFD time slot for any UE includes frequency resources outside the UL subband boundary (i.e., when some of the frequency resources belonging to the above-mentioned guard band or DL ​​subband are included), it can be defined that when the UE generates a PUSCH signal according to the corresponding PUSCH scheduling information and maps it to the frequency resource, it generates a PUSCH transmission signal by rate matching or punching the frequency resource that is not the corresponding UL subband and maps the frequency resource based on the frequency resource belonging to the UL subband.

[0190] As an example, PUSCH transmission is performed only through (multiple) RGBs that completely or partially overlap the UL subband on the frequency axis in the resource block group (RGB) allocated for PUSCH transmission in the SBFD symbol for any UE according to the PUSCH frequency resource allocation based on resource allocation type 0. However, in the case where any RBG partially overlaps the UL subband, that is, any RBG includes all frequency resources outside the UL subband boundary and frequency resources in the UL subband boundary, it can be defined that the UE performs frequency mapping of the corresponding PUSCH transmission through the frequency resources in the UL subband boundary among the frequency resources of the corresponding RBG (one or more PRBs only in the UL subband boundary among the PRBs constituting the corresponding RBG). In other words, when frequency domain resource allocation information based on resource allocation type 0 can be indicated by a DCI format including PUSCH scheduling information (such as DCI formats 0_0, 0_1, 0_2), and the corresponding PUSCH transmission includes SBFD symbols, the UE can only determine the PRBs in the frequency domain belonging to the UL subband among one or more RBGs that partially overlap with the UL subband and all PRBs of all RBGs that completely overlap with the UL subband among the allocated one or more RBGs as available PRB resources for the corresponding PUSCH transmission. In addition, the UE can be defined to perform PUSCH transmission accordingly based on the resource elements (REs) in the corresponding available PRB resources. In this case, as described above, as a method of mapping a PUSCH transmission signal by REs of available PRB resources, the above-mentioned puncturing or rate matching method can be applied.

[0191] Although a method based on puncturing or rate matching for mapping a PUSCH transmission signal to frequency domain resources outside a UL subband boundary based on resource type 0 has been described above, the method is also applicable to other resource allocation types.

[0192] Furthermore, although the above description is made with respect to PUSCH transmission of the UE, the description is equally applicable to reception of the base station. Furthermore, the same description is applicable to PDSCH transmission of the base station and PDSCH reception of the UE including SBFD symbols.

[0193] In addition, although the present disclosure is described based on a 5G NR system, all situations in which the technical spirit of the present disclosure is applied may be included in the scope of the present invention regardless of the specific wireless communication technology.

[0194] According to this, a method and apparatus for efficiently transmitting an uplink in a time slot or symbol to which full-duplex communication is applied can be provided.

[0195] In addition, the present disclosure proposes a frequency sharing technology based on full-duplex communication between different heterogeneous RATs. For example, it can be a frequency sharing method based on full-duplex communication between LTE and 5G NR. In this case, the 5G NR base station can configure one or more UL time slots and perform UL reception on the wireless resources configured by the LTE base station through the DL subframe for DL ​​transmission in any frequency band. In contrast, the 5G NR base station can configure one or more DL time slots and perform DL transmission on the wireless resources configured by the LTE base station through the UL subframe for UL reception. Specifically, in any paired spectrum, the LTE DL band can be used as the UL band of 5G NR, and the UL band of LTE can be used as the DL band of 5G NR. For example, for 5G migration in any LTE FDD band, the DL band of the corresponding LTE FDD band can be used by 5G NR for UL reception, and the UL band can be used by 5G NR for DL ​​transmission. Conversely, in any 5G TDD band, an LTE base station may configure one or more 5G DL time slots with one or more UL subframes used for UL reception, and an LTE base station may configure one or more 5G UL time slots with one or more DL subframes used for DL ​​transmission.

[0196] This spectrum sharing technology based on full-duplex communication between heterogeneous RATs can be extended to 6G, 7G, etc., which will be defined in the future. In other words, any 5G frequency band can be defined to be shared and used based on full-duplex communication in 6G. In this case, in the 5G frequency band, the DL part can be used as the UL part of 6G, and the 5G UL part can be used as the 6G DL part.

[0197] Therefore, in the migration process of mobile communication systems, the demand for spectrum sharing technology is increasing, but spectrum sharing technology basically focuses on a method of using wireless resources between different RATs in an orthogonal manner for the same transmission direction. On the other hand, in the present disclosure, based on full-duplex communication between heterogeneous RATs, the same wireless resources can be used in the form of a pair of different transmission directions (i.e., a DL-UL pair), thereby improving frequency efficiency.

[0198] In addition, the present disclosure proposes a method for solving cross link interference (CLI) that may occur when frequency sharing based on full-duplex communication between heterogeneous RATs is performed.

[0199] CLI is one of the biggest problems of full-duplex communication, and refers to interference caused by UL signals of neighboring UEs using the same wireless resources when receiving DL signals of a base station from any UE. Therefore, when the above-mentioned full-duplex communication between heterogeneous RATs (e.g., RAT A and RAT B) is applied, UL signal transmission of UEs belonging to RAT B may interfere with DL signal reception of UEs belonging to RAT A. Conversely, when UEs belonging to RAT B receive DL signals, UL signal transmission of UEs of RAT B may become interference.

[0200] The transmission of UE-specific radio channels / signals can be resolved by scheduling between UEs. On the other hand, for cell-specific radio channel / signal transmission, a more proactive approach to resolving CLI may be required. For example, a technique may be required to proactively avoid CLI for cell-specific reference signals (RS) (such as LTE CRS) and system information (such as SIBs transmitted via PBCH and PDSCH) or synchronization signals for UE access (such as PSS / SSS). In addition, it is necessary to avoid critical DL transmissions in resources configured via the physical random access channel (PRACH) that are not grant-based UL transmissions.

[0201] To this end, the present disclosure proposes a UL transmission method for minimizing CLI in a UE of RAT B, in which UL transmission in the UE of RAT B is performed based on full-duplex communication in a wireless resource in which a critical DL transmission is performed in any RAT A, that is, the UL transmission is performed through the same resource. However, as described above, specifically, the corresponding full-duplex communication scheme may also include sub-band non-overlapping full-duplex. In the following, the corresponding technology is described based on an example of applying full-duplex communication between LTE and 5G NR. However, this is merely an example, and it is obvious that the same technology can be applied between LTE and 6G, or between 5G and 6G.

[0202] When allocating NR UL resources that overlap with LTE's DL, it can be defined to avoid LTE's PSS / SSS and PBCH transmission resources and LTE CRS transmission resources. In other words, during NR UL transmission, the base station can configure or instruct to perform puncturing or rate matching on specific REs used for UE's UL transmission such as PUSCH, PUCCH, and SRS. Therefore, the UE performs puncturing or rate matching on the corresponding resources during UL transmission.

[0203] To this end, the NR base station can be defined to configure a rate matching pattern or a puncturing pattern for the LTE CRS when the UE transmits UL. The LTE CRS rate matching pattern information of the corresponding NR UL may include carrier frequency information, bandwidth information, multimedia broadcast single frequency network (MBSFN) subframe configuration information, CRS port number information, v-shift information, etc. about the LTE DL. The LTE CRS rate matching pattern information may include CRS rate matching pattern information about one or more LTE carriers. Based on this, the UE can define that during UL transmission, that is, during any PUSCH transmission or PUCCH transmission, in the RE mapping process in the wireless resources allocated for the corresponding PUSCH or PUCCH transmission, puncturing or rate matching is performed on the corresponding LTE CRS transmission RE. In addition, the UE can also be defined to perform puncturing or rate matching on the LTE PSS / SSS and PBCH transmission resources according to the corresponding information.

[0204] However, in addition to the CRS RE or the RE in which PSS / SSS and PBCH transmission is performed, the LTE CRS rate matching information for UL can additionally configure additional rate matching for the neighboring RE of the corresponding RE. In other words, since CLI is the interference of the uplink transmission of the neighboring UE with the downlink reception of any UE, a difference may occur between the DL signal transmission time of the base station and the UL transmission time of the neighboring UE due to, for example, the difference between the DL frame time of the base station and the UL frame time of the neighboring UE as the interference source and the influence of propagation delay. In other words, a difference in symbol boundaries may occur.

[0205] Therefore, protection resources can be defined around DL transmission resources that need to avoid CLI so that rate matching or puncturing is also performed on the corresponding protection resources. In other words, after configuring the CRS rate matching pattern, REs adjacent to CRS REs can be defined as protection resources for CLI avoidance so that rate matching is also performed on the corresponding protection resources. The corresponding protection resources can be adjacent REs in the time domain, that is, REs of the same subcarrier in the preceding symbol or the subsequent symbol of the LTE CRS transmission symbol.

[0206] Alternatively, it may be an adjacent RE in the frequency domain, i.e., an RE corresponding to a subcarrier located above or below the same symbol as the RE performing LTE CRS transmission. The corresponding protection resource may be an RE adjacent to the CRS transmission RE, or may be N consecutive REs. In addition, the protection resource for rate matching may be defined so that a single pattern is defined, and when rate matching for LTE CRS is configured, rate matching of the protection resource pattern may be performed together without separate signaling. Alternatively, the protection resource for rate matching may be defined so that whether additional rate matching is performed on the corresponding single protection resource pattern is performed together with the LTE CRS rate matching configuration. Alternatively, one or more protection resource patterns may be defined, and the base station may transmit protection resource pattern configuration information to be applied to rate matching to the UE.

[0207] Even when full-duplex communication is applied between homogeneous systems, the same content of the above-mentioned UL rate matching can be applied. For example, when any 5G NR base station / cell supports full-duplex communication, the rate matching configured for NR SSB when any UE transmits UL can be defined. In addition, the rate matching configured for protection resources around SSB transmission resources can also be defined. In this case, when the base station configures the PUSCH or PUCCH transmission of the UE, the rate matching information for SSB can be configured. The corresponding SSB rate matching configuration information may include, for example, the index value of the SSB on which the actual SSB transmission is performed among the SSB candidates in the half-frame, and the ssb-periodicityServingCell as the half-frame period-related configuration information. In this case, in order to indicate the index value of the SSB on which the actual SSB transmission is performed among the SSB candidates of the half-frame, each SSB index of the SSB candidate in the half-frame can be indicated in the form of a bitmap, or the SSB index value can be directly indicated, or any pattern can be defined to indicate the corresponding pattern value.

[0208] In addition to SSB transmission, rate matching for UL transmission can also be configured for CSI-RS transmission resources or other DL reference signal transmission resources (such as PRS, PT-RS, and RIM-RS). In this case, identification information about the type of DL reference signal requiring corresponding rate matching, resource allocation information about which the corresponding reference signal is transmitted, etc. can be transmitted through rate matching configuration information for corresponding UL transmission.

[0209] In addition, when configuring rate matching for NR SSB or DL ​​reference signals of NR, rate matching for protection resources can be configured together with the corresponding transmission resources. As described above, the protection resources can be composed of REs adjacent to the corresponding SSB or DL ​​reference signal transmission resources. In other words, the protection resources can be adjacent resources in the time domain (previous symbols or subsequent symbols), that is, in the form of protection time, or adjacent resources in the frequency domain (upper subcarrier or lower subcarrier), that is, in the form of protection subcarriers. A single pattern can be defined for the protection resources so that rate matching can be configured implicitly or explicitly. When configuring rate matching, one or more patterns of protection resources can be defined to include protection resource rate matching mode configuration information.

[0210] The above UL rate matching configuration information can be configured by the base station through RRC signaling, or can be indicated through L1 / L2 control signaling. In this case, the radio resource configuration information requiring corresponding rate matching can be defined to reuse existing configuration information. For example, the rate matching configuration for LTE CRS can be defined to Fig.12 and Fig.13 The previously defined RateMatchPatternLTE-CRS configuration information is applied to UL rate matching. In this case, the corresponding information may additionally include an information area for configuring whether to apply UL rate matching and protection resource configuration information, as described above. Alternatively, a separate RRC message for UL rate matching may be defined, and rate matching for LTE PSS / SSS and PBCH or LTE CRS or NR SSB or NR DL RS may be configured through the corresponding message.

[0211] In addition, it can be defined that the rate matching for the corresponding UL can be configured independently for each of PUSCH or PUCCH, or the UL rate matching is applied only to PUSCH. Alternatively, it can be defined that the UL rate matching is applied to PUSCH by default, and whether the rate matching is applied to PUCCH is configured by the base station.

[0212] According to this, a method and apparatus for supporting full-duplex communication in which a UE can efficiently perform uplink transmission without interference in a full-duplex communication mode in a frequency band allocated as a downlink by another RAT base station can be provided.

[0213] The following describes how to perform the above combination with reference to the accompanying drawings. Figures 1 to 13 The configurations of the UE and the base station of all or some embodiments described above may be omitted to avoid redundant descriptions, in which case, the omitted contents may be applied to the following descriptions in substantially the same manner as long as they do not violate the technical spirit of the present invention.

[0214] Fig.14 is a view showing a configuration of a UE 1400 according to another embodiment.

[0215] Reference Fig.14 , a UE 1400 according to another embodiment includes a transmitter 1420, a receiver 1430, and a controller 1410 that controls operations of the transmitter and the receiver.

[0216] The controller 1410 controls the overall operation of the UE 1400 according to a method of efficiently transmitting uplink in a time slot or symbol to which full-duplex communication is applied, which is required to perform the above-mentioned present invention.

[0217] The controller 1410 may determine the format of the symbol as any one of a downlink symbol, an uplink symbol, and a flexible symbol based on time division duplex (TDD) configuration information received from the base station. The TDD configuration information may include configuration information about a timeslot format and configuration information for determining a symbol format in a timeslot, and the corresponding information may be received through higher layer signaling or L1 signaling.

[0218] The controller 1410 may determine each symbol as one of DL, UL or flexible for the time resources to be applied to the TDD scheme. In other words, based on the cell-specific or UE group-common UL / DL time slot / symbol configuration, the UE-specific downlink time domain resource allocation for any UE is performed in the corresponding DL time slot / symbol, and the UE-specific uplink time domain resource allocation for any UE is performed in the UL time slot / symbol.

[0219] The controller 1410 may receive configuration information about uplink subbands and downlink subbands for full-duplex communication. The configuration information about the full-duplex communication mode may include information for transmitting / receiving data between the UE and the base station in the full-duplex communication mode.

[0220] According to an example, when the base station supports full-duplex communication based on non-overlapping subbands, a specific frequency resource in the same symbol in the TDD carrier is used for downlink transmission, and another frequency resource is used for uplink reception. In other words, the subband can be configured as an arbitrary frequency resource to support a transmission direction different from the DL, UL or flexible transmission direction set by the above-mentioned TDD configuration information.

[0221] When an uplink subband is configured in a symbol configured as a downlink symbol, that is, when the above-mentioned UL FDSB is configured, the corresponding symbol may be referred to as a reconfiguration symbol. The controller 1410 may receive configuration information of a UL FDSB configured in a downlink symbol or a DL FDSB configured in an uplink symbol. In this case, the controller 1410 may determine the corresponding symbol as a reconfiguration symbol.

[0222] The controller 1410 may receive additional information for uplink transmission in a reconfiguration symbol whose format is determined as a configured uplink subband among downlink symbols. In addition, the controller 1410 may transmit an uplink in a reconfiguration symbol based on the additional information for uplink transmission in the reconfiguration symbol.

[0223] According to an example, the controller 1410 may receive information about a bandwidth portion for uplink transmission or downlink reception of the UE in a reconfigured symbol including an uplink subband configured in the base station.

[0224] The SBFD bandwidth part may include PUSCH configuration information and PUCCH resource set configuration information for uplink transmission of the UE in the reconfiguration symbol. In addition, the SBFD bandwidth part may include CORESET configuration information and PDSCH configuration information for downlink reception of the UE in the reconfiguration symbol. Alternatively, the SBFD UL BWP may include PUSCH configuration information and PUCCH resource set configuration information for uplink transmission of the UE. Alternatively, the SBFD DL BWP may include PDSCH configuration information and CORESET configuration information for downlink reception of the UE.

[0225] However, the frequency resources used for uplink transmission can be configured to be limited to the frequency domain of the uplink subband. In other words, the PUCCH resource set configuration information for uplink control information (UCI) transmission / reception within the SBFD bandwidth portion can be limited to be performed in the uplink frequency domain according to the configuration of the full-duplex communication subband (FDSB). In this case, according to the frequency band configuration of the FDSB in the corresponding reconfiguration symbol, the frequency resources of the PUSCH can be allocated within the uplink FDSB, and the PDSCH frequency resources can be limited to be allocated within the downlink frequency band.

[0226] For example, the additional information for uplink transmission in the reconfiguration symbol may be determined based on PUSCH scheduling information or PDSCH scheduling information in a downlink control information format (DCI format) received from the base station. The uplink transmission of the UE in the reconfiguration symbol may be indicated by the transmission of scheduling control information by the base station.

[0227] For example, it is assumed that a PUSCH transmission symbol indicated by a DCI for PUSCH scheduling (such as DCI format 0_0, 0_1, 0_2, etc. received by the receiver 1430) includes a reconfiguration symbol. In other words, when a PUSCH transmission symbol according to time domain resource allocation information about a downlink control information format including PUSCH scheduling information is a reconfiguration symbol, the controller 1410 may transmit the PUSCH in the reconfiguration symbol based on the priority of the PUSCH scheduling information over the TDD configuration information.

[0228] As another example, it is assumed that a HARQ feedback information transmission symbol according to a PDSCH-to-HARQ_feedback timing indicator included in a DCI for PDSCH scheduling (such as DCI formats 1_0, 1_1, 1_2, etc. received by the receiver 1430) is a reconfiguration symbol. In other words, when a HARQ feedback information transmission symbol according to a PDSCH-to-HARQ_feedback timing indicator of a downlink control information format including PUSCH scheduling information is a reconfiguration symbol, the controller 1410 may transmit the HARQ feedback information in the reconfiguration symbol based on the priority of the PUSCH scheduling information over the TDD configuration information.

[0229] Furthermore, according to an example, additional information for uplink transmission in the reconfiguration symbol may be determined based on configuration and activation of a bandwidth portion or an uplink bandwidth portion configured for the reconfiguration symbol.

[0230] When the SBFD UL BWP is configured for the UE or the SBFD UL BWP is configured and indicated to be activated, the uplink transmission operation in the reconfiguration symbol can be configured to be performed. Conversely, when the SBFD DL BWP is configured for the UE or the SBFD DLBWP is configured and indicated to be activated, the downlink reception operation in the reconfiguration symbol can be configured to be performed. In this case, the SBFD UL BWP or the SBFD DL BWP can be configured separately from the existing downlink bandwidth part (DL BWP) or uplink bandwidth part (UL BWP).

[0231] In addition, the activation indication information about the SBFD UL BWP or SBFD DL BWP can be indicated by the DCI format used for PDSCH scheduling or PUSCH scheduling. In this case, the PDSCH scheduling or PUSCH scheduling DCI format can be configured to include an information area for activation indication of a separate SBFD UL BWP or SBFD DL BWP in addition to the activation indication information area for DL ​​BWP or UL BWP (such as an existing bandwidth part indicator). Alternatively, it can be configured to indicate the activation of the SBFD DL BWP or SBFD UL BWP through an existing bandwidth part indicator.

[0232] According to one example, when frequency domain resource allocation information about the downlink control information format including PUSCH scheduling information includes frequency resources outside the frequency domain of the uplink subband, the controller 1410 may transmit the PUSCH by rate matching or puncturing for the PUSCH transmission of the frequency resources outside the frequency domain of the uplink subband.

[0233] As an example, when resource allocation type 0 is applied to PUSCH transmission, if some of the one or more resource block groups allocated for PUSCH transmission overlap at least partially with the frequency domain of the uplink subband, the controller 1410 may transmit PUSCH only for physical resource blocks belonging to the frequency domain of the uplink subband among the physical resource blocks (PRBs) constituting the resource block group. For example, in the case where an RBG partially overlaps with an uplink subband, the UE may perform frequency mapping on the PUSCH only through the frequency resources in the uplink subband boundary among the frequency resources of the corresponding RBG. In other words, frequency mapping may be performed only on one or more PRBs in the uplink subband boundary among the PRBs constituting the corresponding RBG.

[0234] According to this, a method and apparatus for efficiently transmitting an uplink in a time slot or symbol to which full-duplex communication is applied can be provided.

[0235] Fig.15 is a view showing a configuration of a base station 1500 according to an embodiment.

[0236] Reference Fig.15 , a base station 1500 according to another embodiment includes a transmitter 1520, a receiver 1530, and a controller 1510 that controls operations of the transmitter and the receiver.

[0237] The controller 1510 controls the overall operation of the base station 1500 according to a method for efficiently receiving an uplink in a time slot or symbol to which full-duplex communication is applied, which is required for performing the above-mentioned present invention. The transmitter 1520 transmits downlink control information and data or messages to the UE via a corresponding channel. The receiver 1530 receives downlink control information and data or messages from the base station via a corresponding channel.

[0238] The controller 1510 may transmit time division duplex (TDD) uplink (UL)-downlink (DL) configuration information. The controller 1510 may transmit TDD configuration information for determining a symbol format to the UE. In this case, the TDD configuration information may include configuration information about a time slot format and configuration information for determining a symbol format in a time slot, and the corresponding information may be transmitted through higher layer signaling or L1 signaling.

[0239] The controller 1510 may transmit configuration information about uplink subbands and downlink subbands for full-duplex communication. The configuration information about the full-duplex communication mode may include information for transmitting / receiving data between the UE and the base station in the full-duplex communication mode.

[0240] According to an example, when the base station supports full-duplex communication based on non-overlapping subbands, a specific frequency resource in the same symbol in the TDD carrier is used for downlink transmission, and another frequency resource is used for uplink reception. In other words, the subband can be configured as an arbitrary frequency resource to support a transmission direction different from the DL, UL or flexible transmission direction set by the above-mentioned TDD configuration information.

[0241] When an uplink subband is configured in a symbol configured as a downlink symbol, that is, when the above-mentioned UL FDSB is configured, the corresponding symbol may be referred to as a reconfiguration symbol. The controller 1510 may transmit configuration information for the UL FDSB configured in the downlink symbol or the DL FDSB configured in the uplink symbol to the UE.

[0242] The controller 1510 may transmit additional information for uplink reception in a reconfiguration symbol configured with an uplink subband among symbols whose formats are determined as downlink symbols based on the TDD configuration information. In addition, the controller 1510 may receive an uplink in a reconfiguration symbol based on the additional information for uplink reception in the reconfiguration symbol.

[0243] According to an example, the controller 1510 may transmit to the UE information about a bandwidth portion used for uplink transmission or downlink reception of the UE in a reconfigured symbol including an uplink subband.

[0244] The SBFD bandwidth part may include PUSCH configuration information and PUCCH resource set configuration information for uplink transmission of the UE in the reconfiguration symbol. In addition, the SBFD bandwidth part may include CORESET configuration information and PDSCH configuration information for downlink reception of the UE in the reconfiguration symbol. Alternatively, the SBFD UL BWP may include PUSCH configuration information and PUCCH resource set configuration information for uplink transmission of the UE. Alternatively, the SBFD DL BWP may include PDSCH configuration information and CORESET configuration information for downlink reception of the UE.

[0245] However, the frequency resources used for uplink transmission can be configured to be limited to the frequency domain of the uplink subband. In other words, the PUCCH resource set configuration information for uplink control information (UCI) transmission / reception within the SBFD bandwidth portion can be limited to be performed in the uplink frequency domain according to the configuration of the full-duplex communication subband (FDSB).

[0246] For example, additional information for uplink transmission in the reconfiguration symbol may be determined based on PUSCH scheduling information or PDSCH scheduling information in a downlink control information format (DCI format) transmitted from the base station. Uplink transmission of the UE in the reconfiguration symbol may be indicated by transmission of scheduling control information by the base station.

[0247] For example, it is assumed that a PUSCH transmission symbol indicated by a DCI for PUSCH scheduling (such as DCI formats 0_0, 0_1, 0_2, etc.) includes a reconfiguration symbol. In other words, when a PUSCH transmission symbol according to time domain resource allocation information about a downlink control information format including PUSCH scheduling information is a reconfiguration symbol, the controller 1510 may receive the PUSCH in the reconfiguration symbol based on the priority of the PUSCH scheduling information over the TDD configuration information.

[0248] As another example, it is assumed that a HARQ feedback information transmission symbol according to a PDSCH-to-HARQ_feedback timing indicator included in a DCI for PDSCH scheduling (such as DCI formats 1_0, 1_1, 1_2, etc. received by a UE) is a reconfiguration symbol. In other words, when a HARQ feedback information transmission symbol according to a PDSCH-to-HARQ_feedback timing indicator in a downlink control information format including PUSCH scheduling information is a reconfiguration symbol, the controller 1510 may receive the HARQ feedback information in the reconfiguration symbol based on the priority of the PUSCH scheduling information over the TDD configuration information.

[0249] Furthermore, according to an example, additional information for uplink transmission in the reconfiguration symbol may be determined based on configuration and activation of a bandwidth portion or an uplink bandwidth portion configured for the reconfiguration symbol.

[0250] When the SBFD UL BWP is configured for the UE or the SBFD UL BWP is configured and indicated to be activated, the uplink transmission operation in the reconfiguration symbol can be configured to be performed. Conversely, when the SBFD DL BWP is configured for the UE or the SBFD DLBWP is configured and indicated to be activated, the downlink reception operation in the reconfiguration symbol can be configured to be performed. In this case, the SBFD UL BWP or the SBFD DL BWP can be configured separately from the existing downlink bandwidth part (DL BWP) or uplink bandwidth part (UL BWP).

[0251] In addition, the controller 1510 may indicate activation indication information about the SBFD UL BWP or SBFD DL BWP through a DCI format for PDSCH scheduling or PUSCH scheduling. In this case, the PDSCH scheduling or PUSCH scheduling DCI format may be configured to include an information area for activation indication of a separate SBFD UL BWP or SBFD DL BWP in addition to an activation indication information area for DL ​​BWP or UL BWP (such as an existing bandwidth part indicator). Alternatively, it may be configured to indicate activation of the SBFD DL BWP or SBFD UL BWP through an existing bandwidth part indicator.

[0252] According to one example, when the frequency domain resource allocation information about the downlink control information format including PUSCH scheduling information includes frequency resources outside the uplink subband frequency domain, the controller 1510 can receive a punctured or rate-matched PUSCH for the frequency resources outside the frequency domain of the uplink subband.

[0253] As an example, when resource allocation type 0 is applied to PUSCH transmission, if some of the one or more resource block groups allocated for PUSCH transmission overlap at least partially with the frequency domain of the uplink subband, the controller 1510 may receive PUSCH only for physical resource blocks belonging to the frequency domain of the uplink subband among the physical resource blocks (PRBs) constituting the resource block group. For example, in the case where the RBG partially overlaps with the uplink subband, the UE may perform frequency mapping on the PUSCH only through the frequency resources in the uplink subband boundary among the frequency resources of the corresponding RBG.

[0254] According to this, a method and apparatus for efficiently transmitting an uplink in a time slot or symbol to which full-duplex communication is applied can be provided.

[0255] The embodiments described above may be supported by standard documents disclosed in at least one of the wireless access systems such as IEEE 802, 3GPP and 3GPP2. That is, the steps, configurations and parts not yet described in the present embodiment may be supported by the standard documents mentioned above for illustrating the technical concepts of the present disclosure. In addition, all terms disclosed herein may be described by the standard documents set forth above.

[0256] The embodiments described above may be implemented by any of a variety of means. For example, the embodiments may be implemented as hardware, firmware, software, or a combination thereof.

[0257] When implemented by hardware, the method according to this embodiment can be implemented as at least one of an application specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a processor, a controller, a microcontroller or a microprocessor.

[0258] In the case of implementation by firmware or software, the method according to the present embodiment can be implemented in the form of a device, process or function for performing the functions or operations described above. The software code can be stored in a memory unit and can be driven by a processor. The memory unit can be arranged inside or outside the processor and can exchange data with the processor through any of various well-known devices.

[0259] In addition, the terms "system", "processor", "controller", "component", "module", "interface", "model", "unit", etc. can generally refer to computer-related physical hardware, a combination of hardware and software, software, or running software. For example, the components described above can be, but are not limited to, processes driven by a processor, processors, controllers, control processors, entities, execution threads, programs, and / or computers. For example, an application running in a controller or processor and a controller or processor can be a component. One or more components can be set in a process and / or execution thread, and these components can be set in a single device (e.g., a system, a computing device, etc.), or can be distributed on two or more devices.

[0260] The above-mentioned embodiments of the present disclosure have been described for illustrative purposes only, and those skilled in the art will recognize that various modifications and changes may be made thereto without departing from the scope and spirit of the present disclosure. In addition, the embodiments of the present disclosure are not intended to be limiting, but are intended to illustrate the technical ideas of the present disclosure, and therefore the scope of the technical ideas of the present disclosure is not limited by these embodiments. The scope of the present disclosure should be interpreted on the basis of the attached claims so that all technical ideas included in the scope equivalent to the claims belong to the present disclosure.

[0261] CROSS-REFERENCE TO RELATED APPLICATIONS

[0262] This patent application claims priority under Section 119(a) of the United States Patent Act (35 U.S.C. §119(a)) to Korean Patent Application No. 10-2022-0097991 filed on August 5, 2022, and Korean Patent Application No. 10-2023-0102098 filed on August 4, 2023, filed in the Korean Intellectual Property Office, all of which are incorporated herein by reference. At the same time, this patent application also claims priority to countries other than the United States for the same reasons as above, and all of their disclosures are incorporated into this patent application as references.

Claims

1. A method for transmitting an uplink by a UE, the method comprising: Determining a format of a symbol as any one of a downlink symbol, an uplink symbol, and a flexible symbol based on time division duplex (TDD) configuration information received from a base station; receiving configuration information about uplink sub-bands and downlink sub-bands for full-duplex communication; receiving additional information for uplink transmission in a reconfigured symbol in which an uplink subband is configured, among symbols whose format is determined as a downlink symbol; as well as transmitting an uplink in the reconfiguration symbol based on the additional information for uplink transmission in the reconfiguration symbol, The frequency resources used for the uplink transmission are limited to the frequency domain of the uplink subband.

2. The method according to claim 1, wherein: The additional information for uplink transmission in the reconfiguration symbol is determined based on PUSCH scheduling information or PDSCH scheduling information regarding a downlink control information format (DCI format) received from the base station.

3. The method according to claim 2, wherein: When a PUSCH transmission symbol according to time domain resource allocation information about a downlink control information format including the PUSCH scheduling information is the reconfiguration symbol, transmitting the uplink in the reconfiguration symbol based on a priority of the PUSCH scheduling information over TDD configuration information transmits the PUSCH in the reconfiguration symbol.

4. The method according to claim 2, wherein: When a HARQ feedback information transmission symbol according to a PDSCH-to-HARQ_feedback timing indicator of a downlink control information format including the PUSCH scheduling information is the reconfiguration symbol, transmitting the uplink HARQ feedback information in the reconfiguration symbol based on a priority of the PUSCH scheduling information over TDD configuration information.

5. The method according to claim 1, wherein: The additional information for uplink transmission in the reconfiguration symbol is determined based on the uplink bandwidth part or the configuration and activation of the bandwidth part configured for the reconfiguration symbol.

6. The method according to claim 2, wherein: When the frequency domain resource allocation information about the downlink control information format including the PUSCH scheduling information includes frequency resources outside the frequency domain of the uplink subband, the uplink is transmitted in the reconfiguration symbol to transmit the PUSCH by rate matching or puncturing the transmission of the PUSCH for the frequency resources outside the frequency domain of the uplink subband.

7. The method according to claim 6, wherein: When resource allocation type 0 is applied to the transmission of the PUSCH, if some of the one or more resource block groups (RBGs) allocated for the transmission of the PUSCH at least partially overlap with the frequency domain of the uplink subband, the uplink transmitted in the reconfiguration symbol is transmitted only for physical resource blocks (PRBs) belonging to the frequency domain of the uplink subband among the physical resource blocks (PRBs) constituting the resource block group.

8. A method for receiving an uplink by a base station, the method comprising: Transmitting time division duplex (TDD) configuration information; transmitting configuration information about uplink sub-bands and downlink sub-bands for full-duplex communication; transmitting additional information for uplink reception in a reconfigured symbol in which an uplink subband is configured, among symbols whose formats are determined as downlink symbols based on TDD configuration information; as well as receiving an uplink in the reconfiguration symbol based on the additional information for uplink reception in the reconfiguration symbol, The frequency resources used for the uplink reception are limited to the frequency domain of the uplink subband.

9. The method according to claim 8, wherein: The additional information for uplink reception in the reconfiguration symbol is determined based on PUSCH scheduling information or PDSCH scheduling information regarding a downlink control information format (DCI format) transmitted to a UE.

10. The method according to claim 9, wherein: When a PUSCH reception symbol according to time domain resource allocation information about a downlink control information format including the PUSCH scheduling information is the reconfiguration symbol, receiving the uplink in the reconfiguration symbol based on a priority of the PUSCH scheduling information over the TDD configuration information and receiving the PUSCH in the reconfiguration symbol.

11. The method according to claim 9, wherein: When the HARQ feedback information reception symbol according to the PDSCH-to-HARQ_feedback timing indicator of the downlink control information format including the PUSCH scheduling information is the reconfiguration symbol, the uplink is received in the reconfiguration symbol based on the priority of the PUSCH scheduling information over the TDD configuration information and the HARQ feedback information is received in the reconfiguration symbol.

12. The method according to claim 8, wherein: The additional information for uplink reception in the reconfiguration symbol is determined based on the uplink bandwidth part or the configuration and activation of the bandwidth part configured for the reconfiguration symbol.

13. The method according to claim 9, wherein: When frequency domain resource allocation information about the downlink control information format including the PUSCH scheduling information includes frequency resources outside the frequency domain of the uplink subband, the uplink is received in the reconfiguration symbol for receiving a punctured or rate-matched PUSCH for the frequency resources outside the frequency domain of the uplink subband.

14. The method according to claim 13, wherein: When resource allocation type 0 is applied to the reception of the PUSCH, if some of the one or more resource block groups (RBGs) allocated for the reception of the PUSCH at least partially overlap with the frequency domain of the uplink subband, the uplink is received in the reconfiguration symbol only for physical resource blocks (PRBs) constituting the resource block group that belong to the frequency domain of the uplink subband.

15. A UE for transmitting uplink, comprising: transmitter; Receiver; and a controller that controls the operation of the transmitter and the receiver, wherein the controller determines the format of a symbol as any one of a downlink symbol, an uplink symbol, and a flexible symbol based on time division duplex (TDD) configuration information received from a base station, receives configuration information about uplink subbands and downlink subbands for full-duplex communication, receives additional information for uplink transmission in a reconfigured symbol configured with an uplink subband among symbols whose format is determined to be a downlink symbol, and transmits an uplink in the reconfigured symbol based on the additional information for uplink transmission in the reconfigured symbol, and The frequency resources used for the uplink transmission are limited to the frequency domain of the uplink subband.

16. The UE according to claim 15, wherein: The additional information for uplink transmission in the reconfiguration symbol is determined based on PUSCH scheduling information or PDSCH scheduling information regarding a downlink control information format (DCI format) received from the base station.

17. The UE according to claim 16, wherein: When a PUSCH transmission symbol according to time domain resource allocation information on a downlink control information format including the PUSCH scheduling information is the reconfiguration symbol, the controller transmits a PUSCH in the reconfiguration symbol based on a priority of the PUSCH scheduling information over TDD configuration information.

18. The UE according to claim 16, wherein: When a HARQ feedback information transmission symbol according to a PDSCH-to-HARQ_feedback timing indicator of a downlink control information format including the PUSCH scheduling information is the reconfiguration symbol, the controller transmits HARQ feedback information in the reconfiguration symbol based on a priority of the PUSCH scheduling information over TDD configuration information.

19. The UE according to claim 15, wherein: The additional information for uplink transmission in the reconfiguration symbol is determined based on the uplink bandwidth part or the configuration and activation of the bandwidth part configured for the reconfiguration symbol.

20. The UE according to claim 16, wherein: When the frequency domain resource allocation information about the downlink control information format including the PUSCH scheduling information includes frequency resources outside the frequency domain of the uplink subband, the controller transmits the PUSCH by rate matching or puncturing the transmission of the PUSCH for the frequency resources outside the frequency domain of the uplink subband.

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