Method for performing communication in wireless communication system and apparatus therefor

Abstract

According to various embodiments, a method for a terminal to transmit an uplink signal in a wireless communication system and an apparatus therefor are disclosed. Disclosed are a method and an apparatus therefor, the method comprising the steps of: receiving time division duplex (TDD) configuration information for configuring a downlink time interval and an uplink time interval in a time resource period; receiving first indication information specifying a first time interval related to a full duplex operation of a base station during the time resource period; receiving second indication information specifying a second time interval among the first time intervals; and communicating with the base station based on the TDD configuration information, the first indication information and the second indication information. The second time interval is a time interval in the first time interval, which may be changed to a time interval associated with half-duplex operation of the base station.

Description

Technical Field

[0001] The present disclosure relates to a method and an apparatus thereof for performing communication by a user equipment (UE) based on a time interval for performing a full-duplex operation of a base station (BS) in a wireless communication system. Background Art

[0002] Wireless communication systems are being widely deployed to provide various types of communication services such as voice and data. Generally, wireless communication systems are multiple access systems capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and multi-carrier frequency division multiple access (MC-FDMA) systems.

[0003] As more and more communication devices require greater communication capacity when sending and receiving signals, there is a need for improved mobile broadband communications relative to traditional radio access technologies. Therefore, communication systems that take into account services / UEs that are sensitive to reliability and latency are being discussed. The next generation of radio access technologies that take into account enhanced mobile broadband communications, massive machine type communications (MTC), and ultra-reliable and low-latency communications (URLLC) may be referred to as new radio access technologies (RATs) or new radios (NRs). Summary of the invention

[0004] Technical issues

[0005] An object of the present disclosure is to provide a method and apparatus for dynamically changing and designating a second time interval as a time interval for performing half-duplex operation of a BS via downlink (DL) control information by separately pre-designating the second time interval, wherein the second time interval can be changed from a first time interval designated as a time interval for performing full-duplex operation of the BS to a time interval for performing half-duplex operation of the BS.

[0006] Those skilled in the art to which the embodiments pertain will understand that the objects that can be achieved with the embodiments are not limited to the contents specifically described above, and the above and other objects will be more clearly understood from the following detailed description.

[0007] Technical Solution

[0008] According to one aspect, a method for performing communication with a base station (BS) by a user equipment (UE) in a wireless communication system includes: receiving time division duplex (TDD) configuration information for configuring a downlink (DL) time interval and an uplink (UL) time interval within a time resource period; receiving first indication information specifying a first time interval in the time resource period related to the full-duplex operation of the BS; receiving second indication information specifying a second time interval in the first time interval; and performing communication with the BS based on the TDD configuration information, the first indication information and the second indication information, wherein the second time interval is a time interval in the first time interval that can be changed to a time interval related to the half-duplex operation of the BS.

[0009] The second time interval is changed from a time interval associated with a full-duplex operation of the BS to a time interval associated with a half-duplex operation of the BS based on reception of downlink control information (DCI).

[0010] A remaining time interval excluding the second time interval from the first time interval is a time interval fixed to be used for full-duplex operation of the BS regardless of reception of DCI.

[0011] Based on the information of the starting time resource and the information of the last time resource provided in the first indication information, the first time interval is specified within the time resource period.

[0012] Based on the starting time resource information and the duration information provided in the first indication information, the first time interval is specified within the time resource period.

[0013] The first time interval is designated only within a DL time interval based on the first indication information.

[0014] The frequency band used for the first time interval includes a first subband for UL and a second subband for DL ​​that do not overlap with each other.

[0015] The frequency band for the first time interval includes a first subband for UL and a second subband for DL ​​which overlap each other.

[0016] The time resource period may be divided into a first time interval and a third time interval excluding the first time interval based on the first indication information, and the first time interval may be configured with a different transmission power control parameter from the third time interval.

[0017] According to another aspect, a user equipment (UE) for performing communication with a base station (BS) in a wireless communication system includes a radio frequency (RF) transceiver and a processor connected to the RF transceiver, wherein the processor is configured to: control the RF transceiver to receive time division duplex (TDD) configuration information for configuring a downlink (DL) time interval and an uplink (UL) time interval within a time resource period; receive first indication information specifying a first time interval in the time resource period related to the full-duplex operation of the BS; receive second indication information specifying a second time interval in the first time interval; and perform communication with the BS based on the TDD configuration information, the first indication information and the second indication information, and the second time interval is a time interval in the first time interval that can be changed to a time interval related to the half-duplex operation of the BS.

[0018] According to another aspect, a processing device for controlling a user equipment (UE) for performing communication with a base station (BS) in a wireless communication system includes at least one processor and at least one memory, wherein the at least one memory is connected to the at least one processor and stores instructions, wherein the instructions are executed by the at least one processor so that the UE receives time division duplex (TDD) configuration information for configuring a downlink (DL) time interval and an uplink (UL) time interval within a time resource period, receives first indication information specifying a first time interval in the time resource period related to full-duplex operation of the BS, receives second indication information specifying a second time interval in the first time interval, and performs communication with the BS based on the TDD configuration information, the first indication information, and the second indication information, wherein the second time interval is a time interval in the first time interval that can be changed to a time interval related to half-duplex operation of the BS.

[0019] According to another aspect, a method for a base station (BS) to perform communication with a user equipment (UE) in a wireless communication system includes: sending time division duplex (TDD) configuration information for configuring a downlink (DL) time interval and an uplink (UL) time interval within a time resource period to the UE; sending first indication information specifying a first time interval in the time resource period related to the full-duplex operation of the BS to the UE; sending second indication information specifying a second time interval in the first time interval to the UE; and performing communication with the UE based on the TDD configuration information, the first indication information and the second indication information, wherein the second time interval is a time interval in the first time interval that can be changed to a time interval related to the half-duplex operation of the BS.

[0020] Beneficial Effects

[0021] Various embodiments may effectively indicate to a user equipment (UE) a first time interval in a time resource cycle for performing full-duplex operation of a base station (BS) based on a TDD configuration by first indication information about a first time interval in a time resource cycle where a channel environment may be different.

[0022] The second time interval can be dynamically changed to a time interval for performing half-duplex operation of the BS through downlink (DL) control information, and the size of the DL control information can be minimized by separately and in advance indicating the second time interval in the first time interval to be changed to a time interval for performing half-duplex operation of the BS.

[0023] When the BS is highly concerned about interference caused by the execution interval of full-duplex operation in relationship with neighboring BSs, etc., the second time interval can be quickly and dynamically changed to the execution interval of half-duplex operation of the BS, thereby effectively controlling interference that may be caused by the full-duplex operation time interval.

[0024] The effects to be achieved by the embodiments are not limited to the contents specifically described above, and those skilled in the art to which the embodiments belong will more clearly understand other effects not mentioned herein according to the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and together with the description serve to explain the principle of the disclosure.

[0026] Figure 1 The structure of an LTE system to which the embodiment is applied is illustrated.

[0027] Figure 2 The structure of an NR system applicable to the implementation mode is illustrated.

[0028] Figure 3 The structure of an NR radio frame to which an embodiment is applicable is illustrated.

[0029] Figure 4 The time slot structure of the NR frame applicable to the implementation mode is illustrated.

[0030] Figure 5 The diagram illustrates physical channels that can be used in an embodiment and a signal transmission method using the physical channels.

[0031] Figure 6 A process in which a UE sends ACK / NACK via a PUSCH is illustrated.

[0032] Figure 7An example of a CSI-related process is illustrated.

[0033] Figure 8 is a diagram for explaining a method of performing a full-duplex operation in an NR system.

[0034] Fig. 9 and Fig.10 is a diagram for explaining sub-band full-duplex (SBFD) and single-frequency full-duplex (SFFD) operations.

[0035] Fig.11 is a diagram for explaining a method of determining an SBFD time interval within a time resource period based on a TDD configuration.

[0036] Fig.12 is a diagram for explaining a method of indicating an SBFD time interval based on a DL symbol.

[0037] Fig.13 This is a diagram for explaining a method of configuring the SBFD time interval within the flexible time interval.

[0038] Fig.14 It is a diagram for explaining a method of additionally indicating a hard interval and a soft interval with respect to an SBFD time interval.

[0039] Fig.15 is a diagram for explaining a method in which a UE configures / receives a first time interval for performing a full-duplex operation of a BS in a time resource period according to a TDD configuration.

[0040] Fig.16 is a diagram for explaining a method in which a BS configures / receives a first time interval for performing a full-duplex operation of the BS in a time resource period according to a TDD configuration.

[0041] Fig.17 A communication system applied to the present disclosure is illustrated.

[0042] Fig.18 A wireless device suitable for use with the present disclosure is illustrated.

[0043] Fig.19 Another example of a wireless device to which the present disclosure is applied is illustrated. DETAILED DESCRIPTION

[0044] A wireless communication system is a multiple-access system that supports communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of multiple-access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access systems (SC-FDMA) systems, multi-carrier frequency division multiple access (MC-FDMA) systems, and the like.

[0045] Sidelink refers to a communication scheme that establishes a direct link between user equipments (UEs) to directly exchange voice or data between UEs without assistance from a base station (BS). Sidelink is seen as a way to resolve the burden on the BS caused by the rapidly increasing data traffic.

[0046] Vehicle-to-everything (V2X) refers to the communication technology of exchanging information with other vehicles, pedestrians and infrastructure objects through wired / wireless communication. V2X can be divided into four types: vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N) and vehicle-to-pedestrian (V2P). V2X communication can be provided through PC5 interface and / or Uu interface.

[0047] As more and more communication devices require greater communication capacity when sending and receiving signals, there is a need for improved mobile broadband communications relative to traditional radio access technologies. Therefore, communication systems that take into account services / UEs that are sensitive to reliability and latency are being discussed. The next generation of radio access technologies that take into account enhanced mobile broadband communications, massive MTC, and ultra-reliable and low-latency communications (URLLC) may be referred to as new radio access technologies (RATs) or new radios (NRs). Even in NRs, V2X communications may be supported.

[0048] The techniques described herein can be used for various wireless access systems 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), etc. CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology 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 radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc. UTRA is part of Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using Evolved UTRA (E-UTRA). 3GPP LTE adopts OFDMA for downlink and SC-FDMA for uplink. LTE-A is an evolution of 3GPP LTE.

[0049] 5G NR is the successor technology of LTE-A and is a new clean-state mobile communication system characterized by high performance, low latency, and high availability. 5G NR can use all available spectrum resources, including low-frequency bands below 1 GHz, mid-frequency bands between 1 GHz and 10 GHz, and high-frequency (millimeter wave) bands of 24 GHz or more.

[0050] For clarity of explanation, LTE-A or 5G NR is mainly described, but the technical spirit of the implementation manner is not limited thereto.

[0051] Figure 1 The structure of the LTE system to which the present disclosure is applicable is illustrated. This may also be referred to as an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) or an LTE / LTE-A system.

[0052] Reference Figure 1 , E-UTRAN includes an evolved Node B (eNB) 20 that provides a control plane and a user plane to UE 10. UE 10 may be fixed or mobile, and may also be referred to as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), or a wireless device. eNB 20 is a fixed station that communicates with UE 10, and may also be referred to as a base station (BS), a base transceiver system (BTS), or an access point.

[0053] The eNBs 20 may be connected to each other via an X2 interface. The eNBs 20 are connected to an Evolved Packet Core (EPC) 39 via an S1 interface. More specifically, the eNBs 20 are connected to a Mobility Management Entity (MME) via an S1-MME interface, and to a Serving Gateway (S-GW) via an S1-U interface.

[0054] The EPC 30 includes an MME, an S-GW, and a packet data network gateway (P-GW). The MME has access information or capability information about the UE, which is mainly used for mobility management of the UE. The S-GW is a gateway with the E-UTRAN as an endpoint, and the P-GW is a gateway with a packet data network (PDN) as an endpoint.

[0055] Based on the lowest three layers of the open system interconnection (OSI) reference model known in communication systems, the radio protocol stack between the UE and the network can be divided into layer 1 (L1), layer 2 (L2), and layer 3 (L3). These layers are defined in pairs between the UE and the evolved UTRAN (E-UTRAN) for data transmission via the Uu interface. The physical (PHY) layer at L1 provides information transfer services on physical channels. The radio resource control (RRC) layer at L3 is used to control radio resources between the UE and the network. For this purpose, the RRC layer exchanges RRC messages between the UE and the eNB.

[0056] Figure 2 The structure of the NR system is illustrated.

[0057] Reference Figure 2 , the next generation radio access network (NG-RAN) may include next generation Node Bs (gNBs) and / or eNBs that provide user plane and control plane protocol terminations to the UE. Figure 2 In the figure, for example, NG-RAN is shown as including only gNB. gNB and eNB are connected to each other via Xn interface. gNB and eNB are connected to 5G core network (5GC) via NG interface. More specifically, gNB and eNB are connected to access and mobility management function (AMF) via NG-C interface, and to user plane function (UPF) via NG-U interface.

[0058] Figure 3 The structure of an NR radio frame to which the present disclosure is applicable is illustrated.

[0059] Reference Figure 3 , a radio frame can be used for UL transmission and DL transmission in NR. The length of a radio frame is 10ms and can be defined by two 5ms half frames. HF may include five 1ms subframes. A subframe may be divided into one or more slots, and the number of slots in a SF may be determined according to a subcarrier spacing (SCS). Each slot may include 12 or 14 OFDM (A) symbols depending on a cyclic prefix (CP).

[0060] In the case of normal CP (NCP), each time slot may include 14 symbols, and in the case of extended CP (ECP), each time slot may include 12 symbols. Herein, a symbol may be an OFDM symbol (or CP-OFDM symbol) or an SC-FDMA symbol (or DFT-s-OFDM symbol).

[0061] Table 1 below lists the number of symbols N per time slot according to the SCS configuration μ in the NCP case slot symb , the number of time slots per frame N frame,u slot And the number of time slots N in each subframe subframe,u slot .

[0062] [Table 1]

[0063] <![CDATA[SCS(15*2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 15KHz(u=0) 14 10 1 30KHz(u=1) 14 20 2 60KHz(u=2) 14 40 4 120KHz(u=3) 14 80 8 240KHz(u=4) 14 160 16

[0064] The following Table 2 lists the number of symbols per time slot, the number of time slots per frame, and the number of time slots per subframe according to SCS in the ECP case.

[0065] [Table 2]

[0066] <![CDATA[SCS(15*2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 60KHz(u=2) 12 40 4

[0067] In the NR system, different OFDM(A) parameter sets (e.g., SCS, CP length, etc.) can be configured for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of time resources (e.g., subframes, time slots, or TTIs) (for convenience, time resources are collectively referred to as time units (TUs)) comprising the same number of symbols can be configured to be different for the aggregated cells. In NR, various parameter sets or SCSs can be supported to support various 5G services. For example, with an SCS of 15kHz, wide areas in traditional cellular bands can be supported, while with an SCS of 30kHz / 60kHz, dense urban areas, lower latency, and wide carrier bandwidths can be supported. When the SCS is 60kHz or higher, bandwidths wider than 24.25GHz can be supported to overcome phase noise.

[0068] The NR frequency band may be defined by two types of frequency ranges FR1 and FR2. The two types of frequency ranges may be FR1 and FR2. The numerical values ​​of the frequency ranges may be changed. For example, the two types of frequency ranges may be configured as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 may mean "a range below 6 GHz", and FR2 may mean "a range above 6 GHz", and may be referred to as millimeter wave (mmW).

[0069] [Table 3]

[0070] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 450MHz-6000MHz 15kHz, 30kHz, 60kHz FR2 24250MHz-52600MHz 60kHz, 120kHz, 240kHz

[0071] As mentioned above, the value of the frequency range of the NR system can be changed. For example, FR1 may include a frequency band of 410 MHz to 7125 MHz as shown in Table 24 below. That is, FR1 may include a frequency band of 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.) or higher included in FR1 may include an unlicensed frequency band. The unlicensed frequency band can be used for various purposes, for example, for vehicle communications (e.g., autonomous driving).

[0072] [Table 4]

[0073] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 410MHz-7125MHz 15kHz, 30kHz, 60kHz FR2 24250MHz-52600MHz 60kHz, 120kHz, 240kHz

[0074] Figure 4 The time slot structure of the NR frame is illustrated.

[0075] Reference Figure 4, a time slot includes multiple symbols in the time domain. For example, a time slot may include 14 symbols in the normal CP case and 12 symbols in the extended CP case. Alternatively, a time slot may include 7 symbols in the normal CP case and 6 symbols in the extended CP case.

[0076] A carrier may include multiple subcarriers in the frequency domain. A resource block (RB) is defined as a plurality of consecutive subcarriers (e.g., 12 subcarriers) in the frequency domain. A bandwidth part (BWP) may be defined as a plurality of consecutive (P) RBs in the frequency domain, and a BWP may correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., 5) BWPs. Data communication may be performed in an activated BWP. In a resource grid, each element may be referred to as a resource element (RE) and may be mapped to a complex symbol.

[0077] The wireless interface between UEs or the wireless interface between UE and the network may include L1 layer, L2 layer and L3 layer. In various embodiments of the present disclosure, L1 layer may represent a physical layer. L2 layer may represent at least one of a MAC layer, an RLC layer, a PDCH layer or an SDAP layer. L3 layer may represent an RRC layer, for example.

[0078] Bandwidth Part (BWP)

[0079] In an NR system, each component carrier (CC) can support up to 400MHz. If a UE operating on a wideband CC always utilizes RF operation for all enabled CCs, the battery power consumption of the UE may increase. Alternatively, considering various use cases (e.g., eMBB, URLLC, mMTC, V2X, etc.) operating within a wideband CC, different parameter sets (e.g., subcarrier spacing) may be supported for different frequency bands within a specific CC. Alternatively, the capabilities for maximum bandwidth may be different between UEs. In view of this, the BS may instruct the UE to operate only in part of the bandwidth, rather than in the entire bandwidth of the wideband CC. For simplicity, a partial bandwidth is defined as a bandwidth part (BWP). Here, a BWP may be composed of resource blocks (RBs) that are continuous on the frequency axis and may correspond to a parameter set (e.g., subcarrier spacing, CP length, slot / mini-slot duration).

[0080] The BS may configure multiple BWPs in one CC configured for the UE. For example, a BWP occupying a relatively small frequency domain may be configured in the PDCCH monitoring time slot, and the PDSCH indicated by the PDCCH in the larger BWP may be scheduled. Alternatively, when the UE is concentrated in a specific BWP, some of the UEs may be configured in another BWP to balance the load. Alternatively, considering the frequency domain inter-cell interference elimination between adjacent cells, the spectrum in the middle of the entire bandwidth may be punctured and the two BWPs on both sides may be configured in the same time slot. That is, the BS may configure at least one DL / UL BWP for the UE associated with the broadband CC (through L1 signaling, MAC CE or RRC signaling, etc.), and activate at least one DL / UL BWP among the configured DL / UL BWPs at a specific time. The BS may instruct the UE to switch to another configured DL / UL BWP (through L1 signaling, MAC CE or RRC signaling, etc.). Alternatively, when the timer expires, the UE may switch to a predetermined DL / UL BWP. The activated DL / UL BWP is defined as the activated DL / UL BWP. During the initial access procedure or before establishing an RRC connection, the UE may not be able to receive the DL / UL BWP configuration. The DL / UL BWP assumed by the UE in this situation is defined as the initially activated DL / UL BWP.

[0081] Figure 5 is a diagram showing physical channels that can be used in various embodiments and a signal transmission method using the physical channels.

[0082] Reference Figure 5 , when the UE is powered on or when the UE initially enters a cell, in step S11, the UE performs an initial cell search involving synchronization with the BS. For the initial cell search, the UE receives a synchronization signal block (SSB). The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE synchronizes with the BS based on the PSS / SSS and acquires information such as a cell identifier (ID). The UE can then receive broadcast information from the cell on the PBCH. At the same time, the UE can check the downlink channel status by receiving a downlink reference signal (DL RS) during the initial cell search.

[0083] After the initial cell search, the UE may acquire more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) based on information of the PDCCH in step S12.

[0084] Subsequently, in order to complete the connection with the eNB, the UE may perform a random access procedure with the eNB (S13 to S16). In the random access procedure, the UE may send a preamble on a physical random access channel (PRACH) (S13) and may receive a random access response (RAR) to the preamble on a PDSCH associated with the PDCCH (S14). The UE may send a physical uplink shared channel (PUSCH) by using the scheduling information in the RAR (S15), and perform a contention resolution procedure, including receiving a PDCCH signal and a PDSCH signal corresponding to the PDCCH signal (S16).

[0085] In addition to the above-mentioned 4-step random access procedure (4-step RACH procedure or type 1 random access procedure), when the random access procedure is performed in two steps (2-step RACH procedure or type 2 random access procedure), steps S13 and S15 can be performed as a UE sending operation (e.g., an operation of sending message A (MsgA) including a PRACH preamble code and / or PUSCH), and steps S14 and S16 can be performed as a BS sending operation (e.g., an operation of sending message B (MsgB) including RAR and / or contention resolution information).

[0086] After the above process, in a general UL / DL signal transmission process, the UE may receive a PDCCH and / or a PDSCH from the BS ( S17 ) and transmit a PUSCH and / or a physical uplink control channel (PUCCH) to the BS ( S18 ).

[0087] The control information sent by the UE to the BS is collectively referred to as uplink control information (UCI). UCI includes hybrid automatic repeat and request acknowledgement / negative confirmation (HARQ-ACK / NACK), scheduling request (SR), channel quality indicator (CQI), precoding matrix index (PMI), rank indicator (RI), etc.

[0088] Typically, UCI is sent periodically on the PUCCH. However, if control information and service data should be sent simultaneously, control information and service data may be sent on the PUSCH. In addition, UCI may be sent aperiodically on the PUSCH when a request / indication is received from the network.

[0089] Figure 6 The process of the terminal sending ACK / NACK through the PUSCH is illustrated.

[0090] Reference Figure 6, the UE may detect the PDCCH in slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1). The PDCCH indicates DL assignment to PDSCH offset K0 and PDSCH to HARQ-ACK report offset K1. For example, DCI format 1_0 or DCI format 1_1 may include the following information.

[0091] - Frequency domain resource assignment: indicates the RB set assigned to PDSCH.

[0092] - Time domain resource assignment: Indicates K0 (e.g., slot offset), the starting position of the PDSCH in slot #n+K0 (e.g., OFDM symbol index), and the length of the PDSCH (e.g., number of OFDM symbols)

[0093] -PDSCH-to-HARQ_feedback timing indicator: indicates K1

[0094] -HARQ process number (4 bits): indicates the HARQ process identifier (ID) of the data (e.g., PDSCH or TB)

[0095] -PUCCH resource indicator (PRI): indicates the PUCCH resource to be used for UCI transmission among multiple PUCCH resources in a PUCCH resource set

[0096] Subsequently, the UE may receive the PDSCH from time slot #(n+K0) according to the scheduling information in time slot #n. Upon completion of PDSCH reception in time slot #n1 (where n+K0≤n1), the UE may send UCI via PUCCH in time slot #(n1+K1). The UCI may include a HARQ-ACK response to the PDSCH. Figure 6 In the example, it is assumed for convenience that the SCS of the PDSCH and the SCS of the PUCCH are the same and slot #n1=slot #n+K0, but the present disclosure is not limited thereto. When the SCSs are different, K1 may be indicated / interpreted based on the SCS of the PUCCH.

[0097] When the PDSCH is configured to send at most one TB, the HARQ-ACK response may include one bit. When the PDSCH is configured to send at most two TBs, the HARQ-ACK response may include two bits if spatial bundling is not configured and one bit if spatial bundling is configured. When the HARQ-ACK transmission time for multiple PDSCHs is specified as time slot #(n+K1), the UCI sent in time slot #(n+K1) includes HARQ-ACK responses for multiple PDSCHs.

[0098] Whether the UE should perform spatial bundling for the HARQ-ACK response may be configured for each cell group (e.g., via RRC / high-layer signaling). For example, spatial bundling may be configured separately for each HARQ-ACK response sent via PUCCH and / or each HARQ-ACK response sent via PUSCH.

[0099] When the maximum number of TBs (or codewords) that can be received at one time (or can be scheduled by one DCI) in the corresponding serving cell is 2 (or greater) (for example, when the high-level parameter maxNrofCodeWordsScheduledByDCI corresponds to 2 TBs), spatial bundling can be supported. In addition, more than four layers can be used for 2TB transmission, and at most four layers can be used for 1TB transmission. As a result, when spatial bundling is configured for the corresponding cell group, spatial bundling can be performed for the serving cells in the cell group that can schedule more than four layers. On the serving cell, a UE that wants to send a HARQ-ACK response through spatial bundling can generate a HARQ-ACK response by performing a bit-by-bit logical AND operation on the A / N bits of multiple TBs.

[0100] For example, assuming that a UE receives a DCI that schedules two TBs and receives the two TBs through a PDSCH based on the DCI, the UE that performs spatial bundling can generate a single A / N bit by performing a logical AND operation on a first A / N bit of a first TB and a second A / N bit of a second TB. As a result, when both the first TB and the second TB are ACK, the UE reports an ACK bit value to the BS, and when either TB is NACK, the UE reports a NACK bit value to the BS.

[0101] For example, when only one TB is actually scheduled in a serving cell configured to receive two TBs, the UE may generate a single A / N bit by performing a logical AND operation on the A / N bits of the one TB and a bit value 1. As a result, the UE reports the A / N bits of the one TB to the BS as is.

[0102] There are multiple parallel DL HARQ processes for DL ​​transmission in the BS / UE. Multiple parallel HARQ processes allow DL transmission to be performed continuously while the BS waits for HARQ feedback on successful or unsuccessful reception of the previous DL transmission. Each HARQ process is associated with a HARQ buffer of the medium access control (MAC) layer. Each DL HARQ process manages state variables such as the number of transmissions of the MAC physical data block (PDU) in the buffer, the HARQ feedback for the MAC PDU in the buffer, and the current redundancy version. Each HARQ process is identified by a HARQ process ID.

[0103] Hereinafter, a PUSCH transmission procedure is described.

[0104] The UE may detect the PDCCH in slot #n. The PDCCH may include UL scheduling information (eg, DCI format 0_0 or DCI format 0_1). The DCI format 0_0 or DCI format 0_1 ​​may include the following information.

[0105] - Frequency domain resource assignment: indicates the RB set allocated to PUSCH.

[0106] -Time domain resource assignment: Specify the slot offset K2 indicating the starting position (eg, symbol index) and the length of the PUSCH in the slot (eg, the number of OFDM symbols). The starting symbol and length of the PUSCH may be indicated by a start and length indicator value (SLIV) or separately.

[0107] Then, the UE may transmit the PUSCH in slot #(n+K2) according to the scheduling information in slot #n. The PUSCH includes the UL-SCH TB.

[0108] CSI related operations

[0109] Figure 7 An example of a CSI-related process is shown.

[0110] The UE receives CSI-related configuration information from the BS via RRC signaling (710). The CSI-related configuration information may include at least one of channel state information-interference measurement (CSI-IM) related information, CSI measurement related information, CSI resource configuration related information, CSI-RS resource related information, or CSI report configuration related information.

[0111] -CSI-IM resources may be configured for interference measurement (IM) of the UE. In the time domain, the CSI-IM resource set may be configured as periodic, semi-persistent, or aperiodic. The CSI-IM resources may be configured as zero power (ZP)-CSI-RS of the UE. The ZP-CSI-RS may be configured to be distinguished from the non-zero power (NZP)-CSI-RS.

[0112] - The UE may assume that the CSI-RS resources for channel measurement and the CSI-IM / NZP CSI-RS resources for interference measurement configured for one CSI report have a QCL relationship with respect to the "QCL-TypeD" of each resource (when the NZP CSI-RS resources are used for interference measurement).

[0113] - The CSI resource configuration may include at least one of a CSI-IM resource for interference measurement, an NZP CSI-RS resource for interference measurement, and an NZP CSI-RS resource for channel measurement. The channel measurement resource (CMR) may be an NZP CSI-RS for CSI acquisition, and the interference measurement resource (IMR) may be an NZP CSI-RS for CSI-IM and IM.

[0114] -CSI-RS can be configured for one or more UEs. Different CSI-RS configurations can be provided for each UE, or the same CSI-RS configuration can be provided to multiple UEs. CSI-RS can support up to 32 antenna ports. CSI-RS corresponding to N (N is 1 or greater) antenna ports can be mapped to N RE positions within a time-frequency unit corresponding to one time slot and one RB. When N is 2 or greater, N-port CSI-RS can be multiplexed by CDM, FDM and / or TDM methods. CSI-RS can be mapped to the remaining REs except for REs mapped with CORESET, DMRS and SSB. In the frequency domain, CSI-RS can be configured for the entire bandwidth, a partial bandwidth part (BWP) or a partial bandwidth. CSI-RS can be sent in each RB within the bandwidth in which CSI-RS is configured (ie, density = 1), or CSI-RS can be sent in every two RBs (eg, even or odd RBs) (ie, density = 1 / 2). When CSI-RS is used as a tracking reference signal (TRS), a single-port CSI-RS may be mapped on three subcarriers in each resource block (i.e., density = 3). One or more CSI-RS resource sets may be configured for a UE in the time domain. Each CSI-RS resource set may include one or more CSI-RS configurations. Each CSI-RS resource set may be configured as periodic, semi-persistent, or aperiodic.

[0115] -CSI report configuration may include configuration of feedback type, measurement resources, report type, etc. NZP-CSI-RS resource set may be used for CSI report configuration of corresponding UE. NZP-CSI-RS resource set may be associated with CSI-RS or SSB. Multiple periodic NZP-CSI-RS resource sets may be configured as TRS resource sets. (i) Feedback type includes channel quality indicator (CQI), precoding matrix indicator (PMI), CSI-RS resource indicator (CRI), SSB resource block indicator (SSBRI), layer indicator (LI), rank indicator (RI), first layer (L1)-reference signal received strength (RSRP), etc. (ii) Measurement resources may include configuration of downlink signals and / or downlink resources on which UE performs measurements to determine feedback information. Measurement resources may be configured as ZP and / or NZP CSI-RS resource sets associated with CSI report configuration. NZP CSI-RS resource sets may include CSI-RS sets or SSB sets. For example, L1-RSRP may be measured for a CSI-RS set or an SSB set. (iii) The report type may include the time at which the UE performs the report and the configuration of the uplink channel. The reporting time may be configured as periodic, semi-persistent, or aperiodic. Periodic CSI reports may be sent on the PUCCH. Semi-persistent CSI reports may be sent on the PUCCH or PUSCH based on a MAC CE indicating enable / disable. Aperiodic CSI reports may be indicated by DCI signaling. For example, the CSI request field of an uplink grant may indicate one of various report trigger sizes. Aperiodic CSI reports may be sent on the PUSCH.

[0116] The UE measures the CSI based on the configuration information related to the CSI. The CSI measurement may include receiving a CSI-RS (720) and acquiring the CSI by calculating the received CSI-RS (730).

[0117] The UE may send a CSI report to the BS (740). For the CSI report, time resources and frequency resources available to the UE are controlled by the BS. The channel state information (CSI) includes at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), a SS / PBCH block resource indicator (SSBRI), a layer indicator (LI), a rank indicator (RI), L1-RSRP, and / or L-SINR.

[0118] The time domain behavior of CSI reporting supports periodic, semi-persistent, and aperiodic. i) Periodic CSI reporting is performed in short PUCCH and long PUCCH. The periodicity and slot offset of periodic CSI reporting can be configured by RRC, and refer to CSI-ReportConfig IE. ii) SP (semi-periodic) CSI reporting is performed in short PUCCH, long PUCCH or PUSCH. For SP CSI in short / long PUCCH, the periodicity and slot offset are configured by RRC, and CSI reporting is enabled / disabled through a separate MAC CE / DCI. For SP CSI in PUSCH, the periodicity of SP CSI reporting is configured by RRC, but the slot offset is not configured by RRC and SP CSI reporting is enabled / disabled by DCI (format 0_1). For SP CSI reporting in PUSCH, a separate RNTI (SP-CSI C-RNTI) is used. The initial CSI report timing follows the PUSCH time domain allocation value indicated by DCI, and subsequent CSI report timing follows the periodicity configured by RRC. DCI format 0_1 ​​may include a CSI request field and enable / disable a specific configured SP-CSI triggering state. SP CSI reporting has the same or similar enable / disable mechanism as with data transmission in SPS PUSCH. iii) Aperiodic CSI reporting is performed in PUSCH and triggered by DCI. In this case, information related to the triggering of aperiodic CSI reporting may be transmitted / indicated / configured via MAC-CE. For AP CSI with AP CSI-RS, the AP CSI-RS timing is configured by RRC and the timing of the AP CSI report is dynamically controlled by DCI.

[0119] The CSI codebooks (e.g., PMI codebooks) defined in the NR standard can be roughly divided into type I codebooks and type II codebooks. Type I codebooks are mainly for single-user (SU)-MIMO, supporting both high and low orders. Type II codebooks can mainly support MI-MIMO with up to 2 layers. Compared with type I, type II codebooks can provide more accurate CSI, but the signaling overhead may increase accordingly. An enhanced type II codebook is introduced to address the CSI overhead disadvantages of the existing type II codebook by reducing the payload of the codebook by considering the correlation of the frequency axis.

[0120] The CSI report via PUSCH may be configured as part 1 and part 2. Part 1 has a fixed payload size and is used to identify the number of bits of information in part 2. Part 1 may be transmitted in its entirety before part 2.

[0121] - For Type I CSI feedback, part 1 includes RI (if reported), CRI (if reported) and CQI for the first codeword. Part 2 includes PMI, and when RI>4, part 2 includes CQI.

[0122] - For Type II CSI feedback, part 1 includes the RI (if reported), CQI and an indication of the number of non-zero WB amplitude coefficients per layer of Type IICSI. Part 2 includes the PMI of Type IICSI.

[0123] - For enhanced type IICSI feedback, part 1 includes the RI (if reported), CQI and an indication of the total number of non-zero WB amplitude coefficients for all layers of enhanced type IICSI. Part 2 includes the PMI of enhanced type IICSI.

[0124] If the CSI report on PUSCH includes two parts and the CSI payload to be reported is smaller than the payload size provided by the PUSCH resources allocated for CSI reporting, the UE may partially omit Part 2 CSI.

[0125] Semi-persistent CSI reporting performed in PUCCH format 3 or 4 supports Type IICSI feedback, but only supports part 1 of Type IICSI feedback.

[0126] QCL (quasi-isotope)

[0127] Two antenna ports are quasi-colocated when the channel properties of an antenna port can be derived from the channel of another antenna port. The channel properties may include one or more of delay spread, Doppler spread, frequency / Doppler shift, average received power, receive timing / average delay, and spatial RX parameters.

[0128] A list of multiple TCI state configurations may be configured to the UE via the high-level parameter PDSCH-Config. Each TCI state is associated with a QCL configuration parameter between one or two DL RSs and the DMRS port of the PDSCH. The QCL may include qcl-Type1 for the first DL RS and qcl-Type2 for the second DL RS. The QCL type may correspond to one of the following types.

[0129] - "QCL-TypeA": {Doppler shift, Doppler spread, average delay, delay spread}

[0130] - "QCL-TypeB": {Doppler shift, Doppler spread}

[0131] - "QCL-TypeC": {Doppler shift, average delay}

[0132] - "QCL-TypeD": {spatial Rx parameters}

[0133] Beam Management (BM)

[0134] BM is a series of processes for acquiring and maintaining a set of BS (or transmission and reception point (TRP)) beams and / or UE beams that can be used for DL ​​and UL transmission / reception. BM may include the following processes and terms.

[0135] -Beam measurement: The BS or UE measures the characteristics of the received beamformed signal.

[0136] -Beam determination: The BS or UE selects its transmit (Tx) beam / receive (Rx) beam.

[0137] - Beam sweeping: Covering the spatial domain using a Tx beam and / or an Rx beam in a predetermined manner during a predetermined time interval.

[0138] -Beam reporting: The UE reports information about the beamformed signal based on beam measurements.

[0139] BM processing may be divided into (1) DL BM processing using SSB or CSI-RS and (2) UL BM processing using a sounding reference signal (SRS). In addition, each BM processing may include Tx beam sweeping for determining a Tx beam and Rx beam sweeping for determining an Rx beam.

[0140] The DL BM process may include (1) beamforming DL RS (eg, CSI-RS or SSB) transmission from the BS and (2) beam reporting from the UE.

[0141] Here, the beam report may include a preferred DL RS ID and a reference signal received power (RSRP) corresponding to the preferred DL RS ID. The DL RS ID may be a SSB resource indicator (SSBRI) or a CSI-RS resource indicator (CRI).

[0142] Full-duplex operation for NR

[0143] Figure 8 is a diagram for explaining a method of performing a full-duplex operation in an NR system.

[0144] In 5G, new types of services such as extended reality (XR), AI-based services, and self-driving cars have been made. These services have the characteristics of dynamically changing traffic in both DL and UL directions, and require low latency in packet transmission. 5G services may experience an explosive increase in traffic load to support these diverse new use cases. On the other hand, existing semi-static or dynamic TDD UL / DL configurations may have limitations in terms of transmission time delay and interference between operators. Existing FDD methods may have limitations in terms of effective frequency resource utilization in the DL / UL direction. Therefore, the introduction of full-duplex operation within a single carrier has been discussed to achieve low latency and efficient resource utilization in NR.

[0145] Reference Figure 8 , showing a method of applying full-duplex operation within a carrier. In detail, full-duplex operation can be considered as Figure 8 The sub-band full-duplex (SB-FD) scheme illustrated in (a) and Figure 8 The spectrum sharing full-duplex (SS-FD) scheme is illustrated in (b).

[0146] For SB-FD, DL and UL transmission and reception can be performed using different frequency resources in the same carrier. That is, DL and UL can have different frequency resources for the same time resources. For SS-FD, DL and UL transmission and reception are performed through the same frequency resources or overlapping frequency resources in the same carrier. That is, for the same time resources, DL and UL can be allocated the same or overlapping frequency resources.

[0147] Full-duplex operation can be combined with existing half-duplex operation. For example, in existing half-duplex-based TDD operation, only some time resources can be used for full-duplex operation. In the time resources for performing full-duplex operation, SB-FD or SS-FD operation can be performed.

[0148] Hereinafter, in time resources as FD operation (e.g., SB-FD operation or SS-FD operation), frequency resources as DL operation among all frequency resources are defined as DL subbands, and frequency resources as UL operation are defined as UL subbands.

[0149] In the case of full-duplex (hereinafter, FD) operation as described above, FD operation can be performed from the perspective of both gNB and UE. For example, both gNB and UE can simultaneously perform DL / UL transmission and reception by using the same or different frequency resources in the same time resources. Alternatively, only the gNB can perform FD operation (in the same time resources), and the UE can perform HD operation. The gNB can simultaneously perform DL and UL transmission and reception by using the same or different frequency resources in the same time resources, but the UE can perform only DL reception or UL transmission in a specific time resource. In this case, the gNB can perform FD operation in a manner of performing DL transmission and UL reception for different UEs at the same time (or, the same time resource).

[0150] The content described below is generally explained assuming that the gNB performs FD operation and the UE performs HD operation, but it can also be applied to the case where both the gNB and the UE perform FD operation. Based on the above discussion, the method of configuring BWP resources for intra-carrier FD operation is described in detail below.

[0151] FDR's Background

[0152] The introduction of FDR has been discussed in certain scenarios (e.g., 3GPP RAN plenary meetings). There are two types of FDR discussed in the above scenarios, the first one is that there is FDR where the gNB simultaneously transmits and receives DL and UL (or transmits DL and receives UL) at the same frequency, and the other is FDR where the gNB simultaneously transmits and receives DL and UL (or transmits DL and receives UL) at different frequencies. Here, different frequencies means different frequency resources, but different frequencies within a carrier or spectrum, unlike FDD. For all cases, the UE may or may not support FDR, which means simultaneous transmission and reception, and for all cases, it is assumed that the gNB performs transmission and reception simultaneously.

[0153] In the operation of this FDR, the gNB can consider dividing and setting the time intervals of HD (half duplex) and FD (full duplex). This can be largely divided into SBFD (sub-band full duplex) and SFFD (single frequency full duplex), and the time slot configuration and cell resource mode used for this can be considered to be operated based on the following examples.

[0154] First, SBFD can consider Fig. 9 (a) and Fig.10 For details, refer to Fig.10 (a), the subband region of DL and the subband region of UL may not overlap with each other. In this case, a guard band may exist between the subband region of DL and the subband region of UL (an example of a time slot configuration). Alternatively, referring to Fig. 9 (a), the SBFD operation may be performed based on a resource pattern of a cell or BS. For example, in the resource pattern, a half-duplex (HD) time slot / symbol and a SBFD time slot / symbol may be time division multiplexed (TDM) with each other.

[0155] Alternatively, you can also Fig. 9 (b) and Fig.10 The example shown in (b) is considered as SFFD. Fig.10 (b), the DL subband region and the UL subband region may overlap each other. Fig. 9 (b), the SFFD operation may be performed based on a resource pattern of a cell or BS. For example, in the resource pattern, a half-duplex (HD) time slot / symbol and a SBFD time slot / symbol may be TDMed with each other.

[0156] Hereinafter, for the sake of convenience of explanation, with respect to a gNB operating in SBFD (or SFFD), a time interval in which DL transmission and UL reception exist simultaneously in the same / different frequencies is defined as an SBFD slot, an SFFD slot, or a full-duplex slot (or FD slot), and a slot in which an SBFD operation is not performed is defined as a half-duplex slot (or HD slot). SFFD may also be defined as spectrum sharing full-duplex (SSFD), and a method of transmitting and receiving DL and UL through the same frequency resources of overlapping slots / symbols is defined as SSFD and explained below.

[0157] Method for indicating the location of time resources in SBFD operations

[0158] As a kind of full-duplex, the above-mentioned SBFD method and SSFD method are currently under development / discussion. SBFD can utilize some time slots / symbols / subbands of the downlink (DL) in the existing dynamic TDD as uplink (UL) resources, and DL (or DL ​​resources) and UL (or UL resources) can exist simultaneously in different subbands in the same time slot / symbol. In this way, SBFD operation can be defined as a transmission / reception operation or full-duplex operation of the BS in which DL (or DL ​​resources) and UL (or UL resources) exist simultaneously in time slots / symbols in different subbands. Here, SSFD operation means DL and UL transmission and reception through the same frequency resources of overlapping time slots / symbols, which is different from the SBFD described above. In addition, the current technology of SBFD is half-duplex in which the UE uses only one of UL / DL, and is full-duplex as far as the BS is concerned, but the present disclosure describes the determination of the full-duplex time slot / symbol of the UE for the received indication, and therefore can also be applied to the full-duplex of the UE. Below, for ease of explanation, SBFD and SSFD are collectively referred to as SBFD.

[0159] During the time interval in which the SBFD operation is performed, the BS may perform DL transmission and UL reception operations simultaneously, and the UE may perform only one of the DL reception and UL transmission operations. In the SBFD time interval, the UE may perform only one of the DL reception and UL transmission operations, so it may be difficult or impossible to distinguish between the time interval in which the SBFD operation is performed and the time interval in which the SBFD operation is not performed using only the simple configuration of DL / UL in the existing TDD. In the case of SBFD operation, the operation for UL and the operation for DL ​​may be performed simultaneously in the same time slot / symbol, and interference between the gNB and / or UE may occur between cells / within cells / subbands / operators. Such interference may be defined as cross-link interference (CLI). As various methods for handling such CLI, self-interference elimination in the gNB, power control for UL and DL, and methods for adjusting MCS may be considered, and the gNB and the UE need to perform operations different from those in the time interval in which the HD operation is performed to perform the method for handling CLI in the time interval in which the SBFD operation is performed. To this end, the UE may need to distinguish between the time interval in which the SBFD operation is performed and the time interval in which the HD operation is performed.

[0160] Hereinafter, for the sake of convenience of explanation, a time interval, a time resource, and a symbol / time slot during which the SBFD operation of the BS is performed are defined as an SBFD time interval. In this case, a starting time resource or a starting point of the SBFD time interval may correspond to the first symbol / time slot among the time slots and / or symbols constituting the SBFD time interval, and an end or last time resource of the SBFD duration may correspond to the last (or end) symbol / time slot among the time slots and / or symbols constituting the SBFD time interval. A duration associated with the SBFD operation may correspond to the length of the SBFD time interval (or the number of symbols / time slots provided in the SBFD time interval).

[0161] The method proposed below can be applied to a time interval in which a full-duplex operation (FD) is performed by the BS but a half-duplex operation (HD) is performed by the UE, and the full-duplex operation (FD) performed by the BS can include both the above-mentioned SBFD operation and / or SSFD operation. In the following, for ease of explanation, it is assumed that the SBFD operation is performed by the BS as a full-duplex operation, but the method proposed below can naturally be applied not only to the SBFD operation but also to the SSFD operation.

[0162] As a method of indicating the SBFD time interval, an implicit indication method and an explicit indication method may be considered. The implicit indication method may be a method of implicitly including information about the time interval of SBFD (or information about SBFD) in the indication information that the existing gNB indicates the UE to send. For example, TDD-UL-DL-ConfigCommon and TDD-UL-DL-ConfigDedicated may be provided in the RRC parameter information of ServingCellConfigCommonSIB and ServingCellConfig, respectively. In this case, the TDD information may overlap a specific time interval between TDD-UL-DL-ConfigDedicated and TDD-UL-DL-ConfigCommon, and the information of the SBFD time interval may be implicitly provided through the overlapping specific time interval (even if in some scenarios (3GPP specifications), TDD-UL-DL-ConfigDedicated is defined as not to overwrite the information previously configured via TDD-UL-DL-ConfigCommon (TDD configuration information)). In the following, the explicit indication method may be a method of providing information about the time interval of SBFD (i.e., the time interval during which the BS performs full-duplex operation) to the UE by defining new indication information. A method of indicating the time interval of the SBFD using both an implicit indication method and an explicit indication method may also be considered / used.

[0163] Implicit determination via TDD configuration

[0164] First, the assumed time resource period related to the above method will be explained. Here, the time resource period may be one of the parameters defined in TDD-UL-DL-ConfigCommon. Specifically, the time resource period is used by the gNB to notify the UE of the dl-UL-TransmissionPeriodicity of the UL-DL TDD configuration, and may correspond to the time slot configuration period. In detail, the parameters related to the time resource period may be defined / specified as shown in Table 5 below (see 3GPP TS 38.331). Hereinafter, a method for indicating the SBFD time interval (implicitly) based on the time resource period will be described in detail.

[0165] [Table 5]

[0166]

[0167]

[0168] As described above, the implicit indication method for the SBFD time interval has the advantage of not requiring a separate resource for indicating the SBFD time interval. The TDD-UL-DL-ConfigCommon provided in the ServingCellConfigCommonSIB as an RRC parameter can first provide / distribute a common UL / DL configuration (for a time resource period) to all UEs in the cell (see TS 38.331). Here, all UEs in the cell may include both traditional UEs that do not support SBFD-related capabilities and UEs that support SBFD-related capabilities. Here, the capability related to SBFD may be the ability to perform different operations for each SBFD time interval and each HD time interval, and may be the ability to send an uplink signal or receive a downlink signal based on configuration information (power control parameters, MCS or DMRS bundling) that distinguishes between SBFD time intervals and HD time intervals in the UE. Therefore, information about the SBFD time interval needs to be excluded from TDD-UL-DL-ConfigCommon, and therefore the UL / DL configuration for the SBFD time interval (or SBFD operation) needs to be provided in UE-specific or group-common parameters (or information). For example, as a related parameter, TDD-UL-DL-ConfigDedicated is provided in ServingCellConfig which is an RRC parameter. There are two methods that may be applied to indicate the SBFD time interval (or indicate the SBFD configuration) via TDD-UL-DL-ConfigDedicated.

[0169] The first method may be to indicate the SBFD time interval via TDD-UL-DL-ConfigDedicated configuring a UL / DL time interval that partially (or completely) overlaps with TDD-UL-DL-ConfigCommon. The second method may be to define / configure all time intervals in TDD-UL-DL-ConfigCommon that can be operated as SBFD from the beginning as flexible time slots / symbols, and indicate the SBFD time interval with UL / DL TDD configuration through a newly defined UE / cell specific parameter (e.g., TDD-UL-DL-ConfigCommon-DE).

[0170] In detail, according to the first method, when TDD-UL-DL-ConfigDedicated configures a second TDD configuration that partially / completely conflicts with the first TDD configuration of TDD-UL-DL-ConfigCommon, the SBFD time interval (or the time interval for SBFD operation) may correspond to the time interval overlapping between the first TDD configuration and the second TDD configuration. In some scenarios (e.g., TS 38.211), it is assumed that TDD-UL-DL-ConfigDedicated performs a TDD configuration that does not overlap with the TDD configuration of TDD-UL-DL-ConfigCommon, and therefore the first method may be defined as a new method that is not defined in a specific scenario. Alternatively, a new UE-specific RRC parameter (e.g., TDD-UL-DL-ConfigDedicated-DE) other than TDD-UL-DL-ConfigDedicated may be defined, and the SBFD time interval may be defined / indicated as a TDD configuration that partially / completely overlaps with the TDD configuration of TDD-UL-DL-ConfigCommon via the new UE-specific RRC parameter. In this case, this may not conflict with the definition of a specific scenario.

[0171] The second method is to configure TDD (UL / DL configuration) by using new cell-specific parameters. The second method differs from the first method described above in that a new cell-specific (RRC) parameter (e.g., TDD-UL-DL-ConfigCommon-DE) is defined for UEs that support operations related to SBFD time intervals. In this case, legacy UEs that do not support operation capabilities related to SBFD time intervals perform DL / UL configuration based on the existing TDD-UL-DL-ConfigCommon, and UEs that support operation capabilities related to SBFD time intervals can configure SBFD operations or SBFD time intervals as flexible (via TDD-UL-DL-ConfigCommon-DE), and UL / DL can be UE-specifically configured for time intervals configured as flexible.

[0172] Hereinafter, for ease of explanation, TDD-UL-DL-ConfigCommon, TDD-UL-DL-ConfigDedicated and / or TDD-UL-DL-ConfigCommon-DE for configuring DL / UL time resources within a time resource period are defined as TDD configurations. A time interval, time resource and / or DL ​​time slot for performing a DL operation configured based on the TDD configuration is defined and interpreted as a DL time interval (or DL ​​interval), and a time interval, UL time resource and UL time slot / symbol for performing a UL operation configured based on the TDD configuration is defined and interpreted as a UL time interval (or UL interval).

[0173] In the following, the proposed method is configured based on the SBFD time interval, but the proposed method described below can also be applied to SSFD operation / time interval and is not limited to SBFD operation / time interval.

[0174] Explicit Configuration

[0175] Explicit configuration has the following advantages: the SBFD time interval will be explicitly indicated without ambiguity that may arise from implicit indication (e.g., ambiguity or contradiction in indication / determination of SBFD time intervals based on overlapping configurations between TDD-UL-DL-ConfigCommon and TDD-UL-DL-ConfigDedicated). In explicit configuration, the position of the SBFD time interval as a time interval related to the SBFD operation can be indicated in units of time slots / symbols within the time resource period, and the following various alternatives can be considered in a manner of indicating the SBFD time interval in units of time slots / symbols.

[0176] 1. Definition of SBFD time interval based on time resource cycle for the entire TDD-UL-DL-ConfigCommon

[0177] The SBFD time interval (slot / symbol) may be indicated based on the above-mentioned time resource period. As described above, the time resource period may be transmitted to the UE via dl-UL-TransmissionPeriodicity of TDD-UL-DL-ConfigCommon. In this case, the UE may distinguish / configure the boundaries of the slots and symbols associated with the time resource period based on the subcarrier spacing provided in referenceSubcarrierSpacing.

[0178] In detail, referring to Table 5, through nrofDownlinkSlots and nrofUplinkSlots, DL / UL configuration can be configured in units of time slots within a time resource period, and the DL interval (or DL ​​time slot interval) can be configured starting from the time slot in front of the time resource period, and the UL interval can be configured starting from the time slot behind the time resource period. For example, nrofUplinkSlots can configure the UL interval by indicating the number of consecutive time slots starting from the end slot of the time resource period, and nrofDownlinkSlots can configure the DL interval by indicating the number of consecutive time slots starting from the start slot of the time resource period. Here, the start time slot / end time slot of the time resource period can be determined / configured based on the DL-UL mode used for the time resource period. After the UL-DL configuration in units of time slots, the DL / UL period can be configured in units of symbols through nrofDownlinkSymbols and nrofUplinkSymols. For example, nrofDownlinkSymbols may indicate the number of DL symbols continuous from the beginning of the slot after the last slot of the DL (slot) cycle configured in slot units, and nrofUplinkSymols may indicate the number of UL symbols continuous from the end of the slot before the first slot of the UL (slot) interval configured in slot units. Similar to the method of configuring UL and DL intervals in symbol / slot units, the SBFD time interval may also be indicated at the slot / symbol level within the time resource period of the entire TDD-UL-DL-ConfigCommon.

[0179] Fig.11 is a diagram for explaining a method of determining an SBFD time interval within a time resource period based on a TDD configuration.

[0180] Hereinafter, with respect to section "1", a method for indicating / configuring the location of an SBFD time interval (or SBFD time resource) within a time resource period configured via TDD-UL-DL-ConfigCommon will be described in detail. Configuration information for indicating / configuring the location of the SBFD time interval may be provided / indicated to the UE via system information or RRC signaling. In this case, it may be assumed that the SBFD time interval includes consecutive symbols / time slots.

[0181] (1) Alternative 1-1

[0182] Alternative 1-1 may be a method of indicating the starting slot / symbol and the last slot / symbol of the SBFD time interval.

[0183] Reference Fig.11(a), the SBFD time interval may be specified / determined based on an indication of a starting time slot / symbol and a last time slot / symbol within a time resource period. Specifically, in alternative scheme 1-1, the BS may indicate / configure the position of a starting symbol and a last symbol of a SBFD time interval (or a time resource as a SBFD operation) to the UE. The position of the starting symbol may mean the position of the first symbol of the SBFD time interval (or SBFD time resource) starting from the starting position of the time resource period configured for TDD. For example, Fig.11 As shown in (a), in order to indicate the starting symbol, the position of the starting time slot and the position of the starting symbol within the starting time slot may be indicated. In this case, the UE may determine the symbol indicated as the starting symbol within the time slot indicated as the starting time slot as the starting symbol of the SBFD time interval based on the starting position of the time resource period. The position of the last symbol may be the position of the last symbol at the end of the SBFD time interval based on the end position (or end) of the time resource period configured for TDD. For example, the position of the last symbol may be indicated by the position of the last time slot and the position of the last symbol within the last time slot. In this case, as Fig.11 As shown in (a), the UE may determine the symbol of the position of the last symbol in the time slot indicated as the last time slot as the last symbol of the SBFD time interval based on the end of the time resource period. As described above, when the SBFD time interval is indicated by the position of the starting symbol and the last symbol, the UE may determine the SBFD time interval for performing SBFD operation of the cell or BS from the starting symbol to the last symbol in the time resource period configured for TDD. The UE may determine / judge the remaining time resources excluding the determined SBFD time interval from the time resource period configured for TDD as the time interval or time resources for the cell to operate in TDD or HD.

[0184] (2) Alternative 1-2: Indication of the starting slot / symbol and duration of the SBFD time interval

[0185] Alternative 1-2 may be a method in which the BS indicates the SBFD time interval (or SBFD time slot / symbol) to the UE through the starting time slot / symbol and duration of the SBFD time interval.

[0186] For details, refer to Fig.11(b), the SBFD time interval can be specified / determined based on the starting time slot / symbol and duration indicated by the BS. Here, the starting symbol may indicate the position of the first symbol of the SBFD time interval (SBFD time resource) starting from the starting position of the time resource period configured by TDD. For example, in order to indicate the starting symbol, the BS may indicate the position of the starting time slot and the position of the starting symbol within the starting time slot to the UE. In this case, the UE may determine / judge the symbol of the starting symbol position within the time slot indicated as the starting time slot as the starting symbol of the SBFD time interval based on the starting position of the time resource period. The duration may indicate the amount of time resources or the number of continuous time resources (time slots / symbols) constituting the SBFD time interval starting from the starting position (or starting symbol) of the indicated SBFD time interval. For example, the duration may be indicated by the number of time slots of the duration and the number of duration symbols within the duration. In this case, the UE may determine the number of continuous time slots equal to the number of duration time slots and the number of symbols equal to the number of duration symbols within the duration time slot as the duration of the SBFD time interval based on the starting time slot in the time domain. Alternatively, the duration may be indicated by the number of time slots (or the number of consecutive time slots) and the number of symbols (or the number of consecutive symbols). In this case, the UE may determine the number of consecutive symbols equal to 'the number of time slots' * 'the number of OFDM symbols constituting the time slot' + 'the number of symbols' as the duration of the SBFD time interval. In this way, when the SBFD is determined by indicating the starting symbol and the duration, the UE may determine the time resources having a duration starting from the starting symbol within the time resource period configured for TDD as the SBFD time interval for the cell to perform SBFD operation. The UE may determine / judge the remaining time resources excluding the determined SBFD time interval from the time resource period configured for TDD as the time interval or time resources for the cell to operate in TDD or HD.

[0187] 2. Definition of SBFD time interval for DL ​​symbols within the time resource period configured based on TDD

[0188] Fig.12 is a diagram for explaining a method of indicating an SBFD time interval based on a DL symbol.

[0189] In dynamic TDD, TDD is usually configured in the order of DL-Flexible-UL. Taking this into account, it is also expected that the position of the SBFD time interval (or SBFD time slot / symbol) is configured / indicated in the order of DL-SBFD-UL or DL-SBFD-Flexible-UL. In other words, the SBFD time interval can be indicated (only) within the DL time interval configured by the TDD configuration. That is, in part "2", a method for configuring the position of the SBFD time interval within the time resources configured as DL by TDD-UL-DL-ConfigCommon (hereinafter, within the DL time interval) is proposed. The configuration information for indicating / configuring the SBFD time interval can be configured / indicated to the UE via system information or RRC configuration information. Here, the SBFD time interval may include consecutive symbols or time resources.

[0190] (1) Alternative 2-1: Indication of the starting slot / symbol and the last slot / symbol of the SBFD slot / symbol in the DL time interval

[0191] Reference Fig.12 (a), in alternative 2-1, the BS may indicate / configure the position of the starting symbol and the position of the last symbol of the SBFD time interval to the UE. The position of the starting symbol may mean the position of the first symbol of the SBFD time interval (or SBFD time resource) where the starting position of the time resource cycle configured based on TDD starts. For example, in order to indicate the starting symbol, the position of the starting time slot and the position of the starting symbol within the starting time slot may be indicated. In this case, as Fig.12 As shown in (a), the UE may determine the symbol indicated as the starting symbol in the time slot indicated as the starting time slot as the starting symbol of the SBFD time interval based on the starting position of the time resource period. The last symbol may represent the position of the last symbol at the end of the SBFD time interval based on the end position (DL end point) of the time resources constituting the DL time interval in the time resource period of the TDD configuration. Fig.12As shown in (a), the last symbol may also be indicated by the position of the last time slot and the position of the last symbol within the last time slot. In this case, the UE may determine / judge the symbol of the last symbol position within the time slot indicated as the last time slot as the last symbol of the SBFD time interval based on the end position of the DL time interval within the time resource period. As described above, when the SBFD time interval is indicated by the position of the starting symbol and the last symbol, the UE may determine the SBFD time interval for the cell to perform SBFD operation from the starting symbol to the last symbol within the TDD configured time resource period. The UE may determine / judge the remaining time resources excluding the determined SBFD time interval from the TDD configured time resource period as the time interval or time resources for the cell to operate in TDD or HD.

[0192] (2) Alternative 2-2: Indication of the starting slot / symbol and duration of the SBFD time interval within the DL time interval

[0193] Reference Fig.12 (b), in alternative scheme 2-2, it may be a method for the BS to indicate the SBFD time interval to the UE through the starting time slot / symbol and duration of the SBFD time interval. In this case, the UE may expect that the SBFD time interval indicated by the starting time slot / symbol and duration will be within the DL time interval. The starting symbol of the SBFD time interval may indicate the position of the first symbol of the SBFD time interval (SBFD time resource) starting from the starting position of the time resource cycle configured for TDD. For example, in order to indicate the starting symbol of the SBFD time interval, the BS may indicate to the UE the position of the starting time slot and the position of the starting symbol within the starting time slot. In this case, as Fig.12As shown in (b), the UE may determine the symbol indicated as the starting symbol position in the time slot indicated as the starting time slot as the starting symbol of the SBFD time interval based on the starting position of the time resource cycle. The duration may represent the amount of time resources or the number of continuous time resources (time slots / symbols) constituting the SBFD time interval starting from the starting position (or starting symbol) of the SBFD time interval. For example, the duration may be indicated by the number of time slots of the duration and the number of duration symbols in the duration. In this case, the UE may determine the symbol indicated by the position of the advancing duration symbol in the time slot of the number of advancing duration time slots as the duration of the SBFD time interval based on the starting time slot of the SBFD time interval. Alternatively, the duration may be indicated by the number of time slots (or the number of consecutive time slots) and the number of symbols (or the number of consecutive symbols). In this case, the UE may determine the number of consecutive symbols equal to 'the number of time slots' * 'the number of OFDM symbols constituting the time slot' + 'the number of symbols' as the duration of the SBFD time interval. In this case, the SBFD time interval is configured to be located within the DL time interval configured by the TDD configuration. In this way, when the SBFD is determined by indicating the start symbol and the duration, the UE can determine the time resource with the duration starting from the start symbol in the time resource period configured by TDD as the SBFD time interval for the cell to perform the SBFD operation. The UE can determine / judge the remaining time resources excluding the determined SBFD time interval from the time resource period configured by TDD as the time interval or time resource for the cell to operate in TDD or HD.

[0194] (3) Alternative 2-3: Indication of the starting slot / symbol of the SBFD time interval only.

[0195] Reference Fig.12 (c), in alternative scheme 2-3, the BS may indicate only the starting time slot / symbol of the SBFD time interval to the UE. The position of the starting symbol of the SBFD time interval may mean the position of the first symbol at which the SBFD time interval (or SBFD time resource) starts based on the starting position of the time resource period configured for TDD. For example, in order to indicate the starting symbol of the SBFD time interval, the position of the starting time slot and the position of the starting symbol within the starting time slot may be indicated. In this case, the UE may determine the symbol indicated as the starting symbol within the time slot indicated as the starting time slot as the starting symbol of the SBFD time interval based on the starting position of the time resource period. Regarding determining the end symbol of the SBFD time interval, as shown in FIG. Fig.12As shown in (c), even if the last symbol of the SBFD time interval is not indicated, the UE can (implicitly) determine / judge the interval from the indicated start symbol to the last symbol of the DL time interval as the SBFD time interval through the TDD configuration (e.g., TDD-UL-DU-ConfigCommon). Alternatively, the UE can determine the symbol immediately before the start symbol of the UL time interval as the last symbol of the SBFD time interval according to the TDD configuration. The advantage of this method is that one parameter for indicating the SBFD time interval is reduced.

[0196] (4) Alternative 2-4: Indication of the duration of the SBFD time interval only

[0197] Reference Fig.12 (d), in alternatives 2-4, the BS may indicate only the duration of the SBFD time interval to the UE. The duration may represent the amount of time resources or the number of time resources for which the SBFD time resources continue (or continue) based on the end position of the SBFD time interval. For example, the duration may be indicated by the number of duration slots and the number of duration symbols within the duration. In this case, the UE may determine the duration of the SBFD time interval as a symbol indicated by the position of the number of duration symbols in the reverse direction of the time resource within a time slot that advances the number of duration slots in the reverse direction of the time resource based on the start time slot of the UL time interval configured by the TDD configuration (or the start symbol of the start time slot). Alternatively, the duration may be indicated by the number of time slots (or the number of consecutive time slots) and the number of symbols (or the number of consecutive symbols). In this case, the UE may determine the number of symbols equal to 'the number of time slots' * 'the number of OFDM symbols constituting the time slot' + 'the number of symbols' as the duration of the SBFD time interval. In this case, the UE may (implicitly) determine the symbols equal to the duration of the SBFD time interval in reverse time order from the last symbol of the DL time interval configured by the TDD configuration (e.g., TDD-UL-DU-ConfigCommon) (or the start symbol of the UL time interval or the symbol immediately before the start symbol of the UL time interval) as the SBFD time interval for the cell to perform the SBFD operation. The advantage of this method is that one parameter for indicating the SBFD time interval is reduced.

[0198] 3. Definition of SBFD time interval based on DL+ flexible symbols within the time resource period of TDD configuration

[0199] Fig.13is a diagram for explaining a method of configuring a SBFD time interval in a flexible time interval. For example, the TDD configuration may include information on a time resource period in a TDD-to-DL time interval, a UL time interval, and a flexible time interval.

[0200] Section "3" is similar to section "2", but it may be a case where an SBFD time interval is configured within a flexible time interval in addition to the DL / UL time interval. Only semi-static operation is described below, and therefore dynamic operation in a flexible time interval is not described. In section "3", a flexible time interval, such as DL-Flexible-UL, may be configured between the DL time interval and the UL time interval, and an SBFD time interval may be additionally configured / defined between the DL time interval and the flexible time interval. In this case, finally, a DL-SBFD-Flexible-UL may be configured within a time resource period. In this case, the SBFD time interval may be defined together with the DL time interval, the UL time interval, and the flexible time interval, and obviously, the above-mentioned DL-SBFD-Flexible-UL does not specify the definition / indication order of the above-mentioned time intervals.

[0201] In section "3", a method for configuring the location of an SBFD time interval (as a time resource for SBFD operation) within a time resource configured as a DL time interval and a flexible time interval is provided through TDD-UL-DL-ConfigCommon. The configuration information may be configured to the UE through system information or RRC configuration information. The SBFD time interval may include consecutive symbols (or time slots).

[0202] When the configuration is performed as DL-SBFD-Flexible-UL, the configuration method of the SBFD time interval may be different based on the flexible time interval. Hereinafter, the case where the last symbol of the SBFD time interval corresponds to the end symbol of the flexible time interval (e.g., the case where the SBFD operation is performed until the end of the flexible time interval) and the case where the last symbol of the SBFD time interval does not correspond to the end of the flexible time interval (e.g., the case where the SBFD operation is not performed until the end of the flexible time interval) are described in detail respectively.

[0203] (1) When the last symbol of the SBFD time interval matches / corresponds to the last symbol of the flexible time interval,

[0204] This describes the case where the last symbol of the SBFD time interval is indicated as the last symbol of the flexible time interval (i.e., the SBFD operation of the BS is performed until the end of the flexible time interval). In this case, the SBFD time interval can be indicated in a method similar to 'Alternative 2-3' and 'Alternative 2-4'.

[0205] 1) Alternative 3-1: Indication of only the starting slot / symbol of the SBFD time interval.

[0206] Reference Fig.13 (a), in alternative 3-1, the BS may indicate only the starting time slot / symbol of the SBFD time interval to the UE. The position of the starting symbol of the SBFD time interval may mean the position of the first symbol at the start of the SBFD time interval (or SBFD time resource) based on the starting position of the time resource period configured for TDD. For example, in order to indicate the starting symbol of the SBFD time interval, the position of the starting time slot and the position of the starting symbol within the starting time slot may be indicated. In this case, the UE may determine the symbol indicated as the starting symbol within the time slot indicated as the starting time slot as the starting symbol of the SBFD time interval based on the starting position of the time resource period. Here, as Fig.13 As shown in (a), even without a separate indication, the last symbol of the SBFD time interval can be determined as the last symbol of the flexible time interval. Alternatively, the last symbol of the SBFD time interval can be determined as the symbol immediately before the start symbol of the UL time interval.

[0207] Specifically, the expected / predicted (TDD configured) UL time interval may be configured to be after the SBFD time interval, so the UE may (implicitly) determine / estimate the symbol immediately before the start of the UL time interval as the last symbol of the SBFD time interval according to pre-configured / defined RRC configuration information (e.g., TDD-UL-DL-ConfigCommon, TDD-UL-DL-ConfigCommon-DE, TDD-UL-DL-ConfigDedicated, or TDD-UL-DL-ConfigDedicated-DE), even if there is no indication of the last symbol of the SBFD time interval. In this case, there is an advantage that the indication parameter of the last symbol can be omitted.

[0208] 2) Alternative 3-2: Indication of the duration of the SBFD time interval only

[0209] Reference Fig.13(b), in alternative 3-2, the BS may indicate only the duration of the SBFD time interval to the UE. The duration may represent the amount of time resources or the number of time resources for which the SBFD time resources continue (or continue) based on the end position of the SBFD time interval. For example, the duration may be indicated by the number of time slots of the duration and the number of duration symbols within the duration. Alternatively, the duration may be indicated by the number of time slots (or the number of consecutive time slots) and the number of symbols (or the number of consecutive symbols). In this case, the UE may determine the number of time slots equal to 'the number of time slots' * 'the number of OFDM symbols constituting the time slot' + 'the number of symbols' as the duration of the SBFD time interval. In this case, the UE may determine / specify symbols equal to the duration as the SBFD time interval in reverse time order from the starting symbol position of the UL time interval configured based on the TDD configuration (e.g., TDD-UL-DU-ConfigCommon). In this case, there is an advantage that the parameters indicating the last symbol and the starting symbol can be omitted.

[0210] (2) When the last symbol of the SBFD time interval does not match / correspond to the last symbol of the flexible time interval,

[0211] When the last symbol (end) of the SBFD time interval does not match the last symbol (end) of the flexible time interval, similar to alternative 3-1 or alternative 3-2, the start symbol / last symbol of the SBFD time interval may not be implicitly indicated. Therefore, when the end of the SBFD time interval does not match the end of the flexible time interval, similar to alternative 2-1 and alternative 2-2, the BS needs to explicitly configure / indicate the start symbol and the last symbol of the SBFD time interval (or, the start and end of the SBFD time interval) to the UE.

[0212] 1) Alternative 3-3: SBFD indication of the starting slot / symbol and the last slot / symbol of the time interval

[0213] Reference Fig.13 (c), in alternative 3-3, the BS may indicate / configure the position of the starting symbol and the position of the last symbol of the SBFD time interval to the UE. The position of the starting symbol of the SBFD time interval may mean the position of the first symbol at the beginning of the SBFD time interval (or SBFD time resource) based on the starting position of the time resource cycle configured by TDD. For example, in order to indicate the starting symbol of the SBFD time interval, the position of the starting time slot and the position of the starting symbol within the starting time slot may be indicated. In this case, Fig.13As shown in (a), the UE may determine the symbol indicated as the starting symbol in the time slot indicated as the starting time slot as the starting symbol of the SBFD time interval based on the starting position of the time resource period. The last symbol may be indicated by the position of the last time slot and the position of the last symbol in the last time slot. Here, the last symbol may represent the position of the last symbol of the SBFD time interval based on the starting position of the UL time resource in the time resource period configured for TDD. Alternatively, the UE may determine the symbol indicated as the last symbol position in the time slot indicated as the last time slot as the last symbol of the SBFD time interval based on the end position of the time resource period. As described above, when the SBFD time interval is indicated by the starting symbol and the position of the last symbol, the UE may determine the SBFD time interval in which the cell performs SBFD operation from the starting symbol to the last symbol in the time resource period configured for TDD. The UE may determine / judge the remaining time resources excluding the determined SBFD time interval from the time resource period configured for TDD as the time interval or time resource in which the cell operates in TDD or HD. In this case, the range of the SBFD time interval is clearly indicated, and thus there is an advantage in that the SBFD time interval can be indicated regardless of whether the flexible time interval exists.

[0214] 2) Alternative 3-4: Indication of the starting slot / symbol and duration of the SBFD time interval

[0215] Reference Fig.13(d), in alternative schemes 3-4, the BS may indicate the starting time slot / symbol and duration of the SBFD time interval to the UE. The starting symbol of the SBFD time interval may indicate the position of the first symbol of the starting SBFD time interval (SBFD time resource) based on the starting position of the time resource period configured by TDD. For example, in order to indicate the starting symbol of the SBFD time interval, the BS may indicate the position of the starting time slot and the position of the starting symbol within the starting time slot to the UE. In this case, the UE may determine / judge the symbol indicated as the starting symbol position within the time slot indicated as the starting time slot as the starting symbol of the SBFD time interval based on the starting position of the time resource period. The duration may indicate the amount of time resources or the number of continuous time resources (time slots / symbols) constituting the SBFD time interval starting from the starting position (or starting symbol) of the SBFD time interval. For example, the duration may be indicated by the number of time slots of the duration and the number of duration symbols within the duration. In this case, the UE may perform as many times as the number of duration time slots based on the starting time slot, and determine the symbols up to the number of duration symbols within the duration time slot as the duration of the SBFD time interval. Alternatively, the duration may be indicated by the number of time slots (or the number of consecutive time slots) and the number of symbols (or the number of consecutive symbols). In this case, the UE may determine the number of symbols equal to 'the number of time slots' * 'the number of OFDM symbols constituting the time slot' + 'the number of symbols' as the duration of the SBFD time interval. In this case, the SBFD time interval may be configured only within the DL time interval and / or the flexible time interval configured by the TDD configuration. In this way, when the SBFD is determined by indicating the starting symbol and the duration, the UE may determine the time resource having a duration starting from the starting symbol within the time resource period configured by the TDD as the SBFD time interval in which the cell performs the SBFD operation. The UE may determine / judge the remaining time resources excluding the determined SBFD time interval from the time resource period configured by the TDD as the time interval or time resource in which the cell operates in TDD or HD. In this case, the range of the SBFD time interval is explicitly indicated, and therefore there is an advantage that the SBFD time interval can be indicated regardless of whether a flexible time interval exists.

[0216] Additional configuration information of H / S / NA at the SBFD interval

[0217] Fig.14 This is a diagram for explaining a method of additionally indicating a hard interval and a soft interval for an SBFD time interval.

[0218] A hard / soft method in which the gNB semi-statically notifies the UE about time intervals (or HD operation intervals / SBFD operation intervals) including HD time intervals / SBFD time intervals may also be applied. If hard is indicated for a specific time interval (or some time intervals) in the time interval, the UE may determine / assume that there is no change in the HD time interval / SBFD time interval provided in the specific time interval. For example, the UE may determine / assume that the time interval of SBFD within the specific time interval indicated by hard will not be changed / converted to a time interval of HD due to a dynamic indication (DCI, MAC CE, or SFI).

[0219] On the contrary, when soft is indicated for a specific time interval (or some time intervals) in the time interval, if there is no separate indication (using dynamic indication) for the specific time interval indicated as soft, the UE may perform operations according to the HD time interval and the SBFD time interval configured for the specific time interval, but if there is a separate indication, the UE may determine that the configured SBFD time interval may be changed to the HD time interval (and / or the configured HD time interval may be changed to the SBFD time interval). For example, when a specific time interval in the time interval in which the HD time interval and the SBFD time interval are configured by RRC signaling, etc. is indicated as soft, the UE may determine that the SBFD time interval (or SBFD operation interval) in the specific time interval has been changed to the HD time interval (or HD operation interval) by receiving the dynamic indication. Therefore, if there is an additional hard / soft indication, the UE may not need a separate additional indication for the SBFD time interval (or SBFD operation) in the time interval indicated as hard, but a separate explicit indication (such as a dynamic indication of DCI, MAC CE, or SFI) may be required / exist for the SBFD time interval provided in the time interval indicated as soft.

[0220] For details, refer to Fig.14 , the UE may receive (semi-static) indication information indicating the soft interval and the hard interval of the SBFD time interval specified / indicated by the above indication method. Here, the indication information may indicate at least one of the soft period and the hard period by using at least one of the above indication methods. For example, the indication information may include information about at least one of the start slot / start symbol, the last slot / last symbol, or the duration of the soft interval (and / or the hard interval).

[0221] For example, the information about the soft interval may be transmitted through the HS slot configuration list provided in the SBFD cell resource configuration as shown in Table 6 (see TS 38.473).

[0222] [Table 6]

[0223]

[0224] In this case, the UE may monitor whether a dynamic indication related to the soft interval (such as a dynamic indication of DCI, MACCE, or SFI, etc.) is received. When the dynamic indication is not detected, the UE may determine / expect that the soft interval is a time interval (i.e., SBFD time interval) during which the full-duplex operation of the BS is performed as previously configured. Alternatively, when the dynamic indication is detected, the UE may determine / expect that the soft interval has been changed to a time interval during which the half-duplex operation of the BS is performed, which is different from the existing configuration. Among the SBFD time intervals, the hard time interval configured as hard may be determined as a time interval (i.e., SBFD time interval) during which the full-duplex operation of the BS is performed as previously described even if the dynamic indication is received.

[0225] Fig.15 is a diagram for explaining a method in which a UE configures / receives a first time interval for performing a full-duplex operation of a BS in a time resource period according to a TDD configuration.

[0226] Referring to 15, the UE may receive configuration information for a time resource period in which a downlink (DL) time interval (or a time slot / symbol for downlink operation) and an uplink (UL) time interval (or a time slot / symbol for uplink operation) are time-division duplexed (TDD) (S151). Alternatively, the time resource period may include a flexible time interval in addition to the DL time interval and the UL time interval. As described above, the configuration information may be RRC information of TDD-UL-DU-ConfigCommon and may be received via RRC signaling.

[0227] Then, the UE may receive first indication information indicating / designating a first time interval in which the BS performs full-duplex operation in the time resource cycle (S153). The first indication information may include information about at least one of a starting symbol / time slot of the first time interval, a last symbol / time slot of the first time interval, or a duration of the first time interval, as described in reference to Figures 11 to 13 In this case, the UE may specify / determine the first time interval by using the starting symbol / time slot of the first time interval and the last symbol / time slot of the first time interval included in the first indication information, as shown in FIG. Figures 11 to 13 As described, or the first time interval can be specified / determined by using the information about the starting symbol / time slot and duration of the first time interval provided in the first indication information. Here, the information about the duration may include information about the number of time slots and / or the number of symbols provided in the first time interval.

[0228] Here, the frequency band of the first time interval in which the full-duplex operation of the BS is performed may be divided into a DL subband through which the BS transmits a downlink signal and a UL subband through which the BS receives an uplink signal. In this case, when the DL subband and the UL subband are configured not to overlap, the full-duplex operation of the BS may be the above-mentioned SBFD operation, and when the DL subband and the UL subband are configured to partially / completely overlap, the full-duplex operation of the BS may be the above-mentioned SSFD operation. The UE is different from the BS and may perform only a half-duplex operation (HD operation) according to the configuration information even in the first time interval. That is, the UE performs only an operation of sending an uplink signal or an operation of receiving a downlink signal based on the configuration information in the first time interval, without simultaneously performing an operation of sending an uplink signal and an operation of receiving a downlink signal.

[0229] Alternatively, the first indication information may include only information about one of the starting symbol / time slot of the first time interval, the last symbol / time slot of the first time interval, and the duration of the first time interval. In this case, it may be pre-indicated or defined whether the first time interval is configured / indicated (only) in the DL time interval or configured / indicated (only) in the flexible time interval. In this case, the UE may specify / determine the first time interval based on the a priori information about in which time interval the first time interval is configured / indicated and the first indication information. For example, as referred to in Fig.12 As described, when the first indication information includes only information about the starting symbol / time slot and the configuration of the first time interval within the DL time interval is expected, the UE may specify the start time of the first time interval indicated by the first indication information based on the start time of the time resource cycle, and determine the end of the first time interval as the last symbol of the DL time interval (or, the symbol immediately before the start symbol of the UL time interval). Alternatively, when the first indication information includes only information about the duration and the configuration of the first time interval within the DL time interval is expected, as Fig.12 As shown in (d), the UE may determine, based on the last symbol of the DL time interval, a time interval including as many slots / symbols as the number of slots / symbols provided in the information about the duration within the DL time interval as the first time interval.

[0230] Alternatively, as referenced Fig.13As described, when the first indication information only includes information about the starting symbol / time slot and the configuration of the first time interval within the flexible time interval is expected, the UE can specify the starting symbol of the first time interval indicated by the first indication information based on the starting position of the time resource cycle, and determine the end of the first time interval as the last symbol of the flexible time interval (or, the symbol immediately before the starting symbol of the UL time interval). Alternatively, when the first indication information only includes information about the duration and the configuration of the first time interval within the flexible time interval is expected, as Fig.13 As shown in (b), the UE may determine, based on the last symbol of the flexible time interval, a time interval within the flexible time interval including the same number of time slots / symbols as the number of time slots / symbols provided in the information about the duration as the first time interval.

[0231] Here, the UE may divide the time resource period into a first time interval and a third time interval, the third time interval being the remaining time interval in the time resource period excluding the first time interval (i.e., the time interval for performing the HD operation of the BS). In this case, even if the UE performs only half-duplex operation in both the first time interval and the third time interval, the UE may perform different operations in each of the first time interval and the third time interval by considering the difference in the channel environment, etc. between the two time intervals. For example, the UE may have different frequency bands for sending uplink signals in the third time interval and different frequency bands for sending uplink signals in the first time interval. The UE may be scheduled using frequency resources for sending uplink signals within an uplink bandwidth part (BWP) in the third time interval, but for the first time interval, may be scheduled using frequency resources for sending uplink signals only within an uplink subband, as described above.

[0232] Alternatively, the UE may determine the transmission power of the uplink signal differently for each of the first time interval and the third time interval. For example, when the UE determines the transmission power of the uplink signal based on open loop power control (OLPC), the UE may transmit the uplink signal for the first time interval at a higher transmission power than for the third time interval. Alternatively, the UE may be configured with an MCS for each of the first time interval and the third time interval. For example, when the UE transmits an uplink signal based on a CG configuration, a first MCS for the first time interval and a second MCS (different from the first MCS) for the third time interval may be configured respectively. In this case, the UE may transmit an uplink signal based on the first MCS when performing transmission of an uplink signal configured based on the CG in the first time interval, and may transmit an uplink signal based on the second MCS when performing transmission of an uplink signal configured based on the CG in the third time interval. Alternatively, the UE may be configured with a first MCS table associated with the first time interval and a second MCS table associated with the third time interval.

[0233] Alternatively, the UE may repeatedly send a DMRS bundled uplink signal. In this case, the UE may not perform DMRS bundling through the first time interval and the third time interval. For example, the UE may receive an indication related to DMRS bundling from the BS, and repeatedly send a DMRS bundled uplink signal based on the configured nominal time domain window (TDW). In this case, when the actual TDW is configured on the first time interval and the third time interval, the UE may determine / believe that the actual TDW has ended at the boundary of the first time interval and the third time interval, and perform DMRS bundling. This is because, as described above, in the first time interval, uplink signals and downlink signals may be simultaneously sent and received in two adjacent frequency bands (UL subband and DL subband), and due to the transmission and reception of these two signals, significant interference (CLI) is generated in the first time interval, so the channel environment of the third time interval and the first time interval may be different.

[0234] Then, the UE may receive second indication information indicating / specifying a second time interval within the first time interval from the BS (S155). The second time interval may be a time interval in the first time interval that is to be changed to a time interval for HD operation (i.e., a time interval in which the BS performs half-duplex operation), as described with reference to Fig.14As described. The UE may specify the second time interval and the fourth time interval through the second indication information, the second time interval may be changed to the time interval for the HD operation of the BS in the first time interval, and the fourth time interval is fixed to the time interval for the SBFD operation of the BS. The second indication information may also indicate the second time interval (and / or the fourth time interval) through information about at least one of the starting time slot / symbol, the last time slot / symbol, or the duration of the second time interval (and / or the fourth time interval).

[0235] Then, the UE may monitor whether downlink control information (DCI) indicating a change in the operation of the BS is received / detected for the second time interval (S157). Here, the DCI may be information that notifies or indicates a change from the full-duplex operation of the BS to the half-duplex operation of the BS in the second time interval based on the above-mentioned DCI format 2.5. In this case, when the DCI is received / detected, the UE may determine that the operation of the BS has changed from full-duplex operation to half-duplex operation in the second time interval. Alternatively, if the DCI is not detected, the UE may determine that the operation of the BS remains in full-duplex operation during the second time interval. During the fourth time interval, the full-duplex operation of the BS may be performed continuously regardless of the reception / detection of the DCI.

[0236] Fig.16 is a diagram for explaining a method in which a BS configures / receives a first time interval for performing a full-duplex operation of the BS in a time resource period according to a TDD configuration.

[0237] Reference Fig.16 , the BS may send configuration information (S161) for a time resource period in which a downlink time interval and an uplink time interval are time-divided (time division duplex, TDD) to the UE. Here, as described above, the configuration information may be signaled via a parameter such as TDD-UL-DU-ConfigCommon. In addition to the DL time interval and the UL time interval, the time resource period may also include a flexible time interval.

[0238] Then, the BS may send first indication information (S163) to the UE indicating / specifying a first time interval in which the BS performs full-duplex operation in the time resource cycle. Here, the first indication information may also be sent to the UE via RRC signaling in the same manner as the configuration information. The first indication information may include information about at least one of the starting symbol / time slot of the first time interval, the last symbol / time slot of the first time interval, or the duration of the first time interval, as described in reference to Figures 11 to 13Here, the frequency band of the first time interval in which the full-duplex operation of the BS is performed may be divided into a DL subband through which the BS transmits a downlink signal and a UL subband through which the BS receives an uplink signal. In this case, when the DL subband and the UL subband are configured not to overlap, the full-duplex operation of the BS may be the above-mentioned SBFD operation, and when the DL subband and the UL subband are configured to partially / completely overlap, the full-duplex operation of the BS may be the above-mentioned SSFD operation.

[0239] The first indication information may include only information about one of the starting symbol / time slot of the first time interval, the last symbol / time slot of the first time interval, and the duration of the first time interval. In this case, it may be indicated or defined in advance to the UE whether the first time interval is configured / indicated (only) in the DL time interval or (only) in the flexible time interval.

[0240] Here, the time resource period may be divided into a first time interval and a third time interval, the third time interval being the time interval remaining from the time resource period excluding the first time interval (and / or the first time interval and the second time interval). In this case, the BS may configure different transmission parameters for the UL signal between the first time interval and the third time interval. For example, the BS may configure a different transmission power control parameter for the first time interval than that configured for the third time interval. For example, the BS may configure / indicate a transmission power control parameter for the first time interval to the UE, so that the transmission power of the UL signal for the first time interval may be determined to be a value greater than the transmission power for the third time interval. Alternatively, the BS may configure a different MCS for the first time interval than that configured for the third time interval. Alternatively, the BS may expect that no DMRS-bundled UL signal will be received during the third time interval and the first time interval.

[0241] Then, the BS may send second indication information indicating / specifying a second time interval within the first time interval to the UE (S165). The second time interval may be a time interval in the first time interval that is to be changed to a time interval for HD operation (i.e., a time interval in which the BS performs half-duplex operation), as described with reference to Fig.14 As described. The BS may indicate / configure the second time interval and the fourth time interval to the UE through the second indication information, the second time interval may be changed to the time interval for the HD operation of the BS in the first time interval, and the fourth time interval is fixed as the time interval for the SBFD operation of the BS. The second indication information may also indicate the second time interval (and / or the fourth time interval) through information about at least one of the starting time slot / symbol, the last time slot / symbol, or the duration of the second time interval (and / or the fourth time interval).

[0242] Then, the BS may send downlink control information (DCI) including change indication information for the second time interval to the UE (S167). Here, the change indication information may be information indicating a change from the second time interval for performing full-duplex operation of the BS to the HD time interval for performing half-duplex operation of the BS. The BS may notify the UE that the second time interval is changed from the time interval for full-duplex operation of the BS to the time interval for half-duplex operation of the BS by sending DCI (e.g., DCI format 2.5). For example, when it is determined that interference with a neighboring cell may occur significantly in the second time interval (e.g., when it is identified that the UL time interval of the neighboring cell is configured in the second time interval), the BS needs to reduce the time interval for performing full-duplex operation to reduce interference. To this end, the BS may determine to perform half-duplex operation in the second time interval, and may notify the UE through DCI that the time interval has been changed to the time interval for half-duplex operation of the BS. Even if the BS notifies through DCI that the second time interval has been changed to the time interval for half-duplex operation, full-duplex operation may be performed in the fourth time interval. That is, the BS may change only some time intervals in the first time interval to time intervals for half-duplex operation through the second indication information.

[0243] In this way, the proposed disclosure can effectively indicate the first time interval to the UE through the first indication information about the first time interval in which the channel environment may be different in the time resource cycle, during which the full-duplex operation of the BS is performed in the time resource cycle based on the TDD configuration. The second time interval can be dynamically changed and designated as a time interval for performing the half-duplex operation of the BS by separately pre-specifying the second time interval, and the second time interval can be changed from the first time interval designated as the time interval for performing the full-duplex operation of the BS to the time interval for performing the half-duplex operation of the BS. By pre-specifying the second time interval through RRC signaling, the DL control information only needs to include 1-bit indication information about whether the second time interval is changed to a time interval for the half-duplex operation of the BS, without specifying the information of the second time interval, so the size of the DL control information can be minimized. When the BS is highly concerned about the interference caused by the execution interval of the full-duplex operation relative to the adjacent BS, etc., the second time interval can be dynamically changed to the execution interval of the half-duplex operation of the BS, thereby effectively controlling the interference that may be caused by the full-duplex operation time interval.

[0244] Communication system example to which the present disclosure is applied

[0245] Although not limited thereto, the various descriptions, functions, processes, proposals, methods and / or operational flowcharts of the present disclosure disclosed in this document may be applied to various fields requiring wireless communication / connection (5G) between devices.

[0246] Hereinafter, it will be illustrated in more detail with reference to the accompanying drawings.In the following drawings / descriptions, unless otherwise specified, the same reference numerals may illustrate the same or corresponding hardware blocks, software blocks or functional blocks.

[0247] Fig.17 A communication system applied to the present disclosure is illustrated.

[0248] Reference Fig.17 , the communication system 1 applied to the present disclosure includes a wireless device, a base station (BS), and a network. Herein, the wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or long term evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include (but is not limited to) a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices, and may be implemented in the form of a head mounted device (HMD), a head up display (HUD) installed in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, a digital sign, a vehicle, a robot, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0249] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS / network. For example, vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0250] Wireless communication / connection 150a, 150b or 150c can be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Herein, wireless communication / connection can be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication) or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device can send / receive radio signals to / from each other through wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b can send / receive signals through various physical channels. To this end, at least a portion of various configuration information for configuring processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation and resource mapping / demapping) and resource allocation processes can be performed based on various proposals of the present disclosure.

[0251] Examples of wireless devices to which the present disclosure is applied

[0252] Fig.18 A wireless device suitable for use with the present disclosure is illustrated.

[0253] Reference Fig.18 , the first wireless device 100 and the second wireless device 200 may transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Fig.17 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0254] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102, and may store various information related to the operation of the processor 102. For example, the memory 104 may store software codes including commands for executing part or all of the processes controlled by the processor 102 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0255] According to an example, the first wireless device 100 or UE may include a processor 102 and a memory 104 connected to an RF transceiver. The memory 104 may include a processor capable of executing the reference Figures 11 to 15 At least one procedure of operations related to the described embodiments.

[0256] In detail, the processor 102 can control the radio frequency (RF) transceiver 106 to receive configuration information of a time resource period for which a DL time interval and a UL time interval are time division duplexed (TDD), receive first indication information of a first time interval related to a full-duplex operation of the BS in a specified time resource period, receive second indication information of a second time interval in the specified first time interval that can be changed to a time interval related to a half-duplex operation of the BS, and perform communication with a second wireless device 200 or a BS based on the TDD configuration information, the first indication information, and the second indication information.

[0257] Alternatively, the processor 102 and the memory 104 may be a processing device for controlling a UE to perform communication with a BS. In this case, the processing device includes at least one processor and at least one memory, the at least one memory being connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor so that the UE receives configuration information for a time resource period in which a DL time interval and a UL time interval are time division duplexed (TDD), receives first indication information specifying a first time interval in the time resource period related to a full-duplex operation of the BS, receives second indication information specifying a second time interval in the first time interval that can be changed to a time interval related to a half-duplex operation of the BS, and performs communication with the BS based on the TDD configuration information, the first indication information, and the second indication information.

[0258] Alternatively, a configuration may be provided on which a Figures 11 to 15 A non-transitory computer-readable storage medium of instructions for the proposed method is described.

[0259] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 206, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202, and may store various information related to the operation of the processor 202. For example, the memory 204 may store software codes including commands for executing part or all of the processes controlled by the processor 202 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0260] According to an embodiment, the BS or the network may include a processor 202, a memory 204, and / or a transceiver 206. The processor 202 may control the transceiver 206 and the RF transceiver 206 to send configuration information of a time resource period in which a DL time interval and a UL time interval are time division duplexed (TDD) to the UE, send first indication information of a first time interval related to a full-duplex operation of the BS in the time resource period to the UE, send second indication information of a second time interval related to a half-duplex operation of the BS in the first time interval to the UE, and perform communication with the second wireless device 100 or the UE based on the TDD configuration information, the first indication information, and the second indication information.

[0261] In the following, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by (but not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document.

[0262] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flow charts disclosed in this document may be implemented in the form of codes, commands and / or command sets using firmware or software.

[0263] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions and / or commands. One or more memories 104 and 204 may be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer-readable storage medium and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside of one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 by various technologies such as wired or wireless connections.

[0264] One or more transceivers 106 and 206 may send the user data, control information and / or radio signal / channel mentioned in the method and / or operation flow chart of this document to one or more other devices. One or more transceivers 106 and 206 may receive the user data, control information and / or radio signal / channel mentioned in the description, function, process, proposal, method and / or operation flow chart disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information or wireless signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flow charts disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals so as to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0265] Application examples of wireless devices to which the present disclosure is applied

[0266] Fig.19 Another example of a wireless device to which the present disclosure is applied is shown.

[0267] Reference Fig.19 , the wireless devices 100 and 200 may correspond to Fig.18The wireless devices 100 and 200 may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130 and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Fig.18 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Fig.18 The control unit 120 is electrically connected to the communication unit 110, the memory 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 may send information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 in the memory unit 130 through a wireless / wired interface.

[0268] The additional components 140 may be configured differently depending on the type of wireless device. For example, the additional components 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be configured in the form of, but not limited to, a robot ( Fig.17 100a), vehicles ( Fig.17 100b-1 and 100b-2), XR devices ( Fig.17 100c), handheld device ( Fig.17 100d), household appliances ( Fig.17 100e), IoT devices ( Fig.17 100f), digital broadcasting terminal, holographic device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig.17 400), BS( Fig.17 200), network nodes, etc. The wireless device can be used in a mobile or fixed location according to the usage example / service.

[0269] exist Fig.19In the wireless devices 100 and 200, various elements, components, units / parts and / or modules in the wireless devices 100 and 200 may all be connected to each other through a wired interface, or at least a part thereof may be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be wired, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected through the communication unit 110. The various elements, components, units / parts and / or modules within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured by a collection of one or more processors. As an example, the control unit 120 may be configured by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. In another example, the memory 130 may be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM)), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0270] Here, the wireless communication technology implemented in the wireless device (XXX, YYY) of this specification may include LTE, NR and 6G in addition to narrowband Internet of Things for low-power communication. At this time, for example, NB-IoT technology may be an example of low-power wide area network (LPWAN) technology, and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above names. In addition or alternatively, the wireless communication technology implemented in the wireless device (XXX, YYY) of this specification may perform communication based on LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN technology, and may be referred to as various names such as eMTC (enhanced machine type communication). For example, LTE-M technology may be implemented according to at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-bandwidth limited), 5) LTE-MTC, 6) LTE machine type communication and / or 7) LTE M, and is not limited to the above names. Additionally or alternatively, in consideration of low power communication, the wireless communication technology implemented in the wireless device (XXX, YYY) of the present specification is at least one of ZigBee, Bluetooth, and a low power wide area network (LPWAN), and is not limited to the above names. As an example, ZigBee technology can generate a personal area network (PAN) related to small / low power digital communication based on various standards such as IEEE 802.15.4, and can be referred to as various names.

[0271] The above-mentioned embodiments are embodiments in which the components and features of the present disclosure are combined in a predetermined form. Unless otherwise clearly stated, each component or feature should be considered as optional. Each component or feature can be implemented in a form that is not combined with other components or features. In addition, the embodiments of the present disclosure can also be constituted by combining some components and / or features. The order of the operations described in the embodiments of the present disclosure can be changed. Some configurations or features of an embodiment can be included in other embodiments, or can be replaced with corresponding configurations or features of other embodiments. Obviously, the embodiments can be constructed by combining claims that do not have a clear reference relationship in the claims, or can be included as new claims by modifying after submission.

[0272] In this document, the embodiments of the present disclosure are described mainly based on the signal transmission / reception relationship between the terminal and the base station. Such a transmission / reception relationship is extended to the signal transmission / reception between the terminal and the repeater or between the base station and the repeater in the same / similar manner. In some cases, the specific operations described in this document as being performed by the base station can be performed by the node on it. That is, it is obvious that various operations performed in order to communicate with the terminal in a network including multiple network nodes containing the base station can be performed by the base station or by a network node other than the base station. The base station can be replaced by terms such as fixed station, node B, eNode B (eNB), access point, etc. In addition, the terminal can be replaced by terms such as user equipment (UE), mobile station (MS), mobile subscriber station (MSS).

[0273] In hardware configuration, the embodiments of the present disclosure may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, etc.

[0274] In firmware or software configuration, the method according to the embodiment of the present disclosure can be implemented in the form of modules, processes, functions, etc. The software code can be stored in a storage unit and executed by a processor. The memory is located inside or outside the processor and can send data to the processor and receive data from the processor via various known means.

[0275] As mentioned above, a detailed description of the preferred embodiments of the present disclosure has been given so that those skilled in the art can implement and perform the present disclosure. Although the preferred embodiments of the present disclosure have been referred to above, those skilled in the art will understand that various modifications and changes can be made to the present disclosure within the scope of the present disclosure.

[0276] Industrial Applicability

[0277] The above-mentioned embodiments of the present disclosure may be applicable to various mobile communication systems.

Claims

1. A method for performing communication between a user equipment UE and a base station BS in a wireless communication system, the method comprising: receiving time division duplex (TDD) configuration information for configuring a downlink (DL) time interval and an uplink (UL) time interval within a time resource period; receiving first indication information specifying a first time interval in the time resource period related to full-duplex operation of the BS; receiving second indication information specifying a second time interval in the first time interval; as well as performing communication with the BS based on the TDD configuration information, the first indication information, and the second indication information, The second time interval is a time interval in the first time interval that can be changed to a time interval related to the half-duplex operation of the BS.

2. The method according to claim 1, wherein: Based on reception of downlink control information DCI, the second time interval is changed from a time interval associated with a full-duplex operation of the BS to a time interval associated with a half-duplex operation of the BS.

3. The method according to claim 2, wherein: A remaining time interval excluding the second time interval from the first time interval is a time interval fixed to be used for full-duplex operation of the BS regardless of reception of the DCI.

4. The method according to claim 1, wherein: Based on the information of the starting time resource and the information of the last time resource provided in the first indication information, the first time interval is specified within the time resource period.

5. The method according to claim 1, wherein: Based on the starting time resource information and the duration information provided in the first indication information, the first time interval is specified within the time resource period.

6. The method according to claim 1, wherein: The first time interval is designated only within the DL time interval based on the first indication information.

7. The method according to claim 1, wherein: The frequency band for the first time interval includes a first subband for UL and a second subband for DL ​​that do not overlap with each other.

8. The method according to claim 1, wherein: The frequency band for the first time interval includes a first subband for UL and a second subband for DL ​​that overlap each other.

9. The method according to claim 1, wherein: dividing the time resource period into the first time interval and a third time interval excluding the first time interval based on the first indication information, and The first time interval is configured with a different transmit power control parameter than the third time interval.

10. The method according to claim 1, wherein: The first indication information and the second indication information are received from the BS through radio resource control (RRC) signaling. 11 . A non-transitory computer-readable storage medium having recorded thereon instructions for executing the method according to claim 1 .

12. A user equipment UE for performing communication with a base station BS in a wireless communication system, the UE comprising: Radio frequency RF transceiver; as well as a processor connected to the RF transceiver, The processor is configured to control the RF transceiver to: receive time division duplex (TDD) configuration information for configuring a downlink (DL) time interval and an uplink (UL) time interval within a time resource period; receive first indication information specifying a first time interval related to a full-duplex operation of the BS in the time resource period; receive second indication information specifying a second time interval in the first time interval; and perform communication with the BS based on the TDD configuration information, the first indication information, and the second indication information, and The second time interval is a time interval among the first time intervals that can be changed to a time interval associated with a half-duplex operation of the BS.

13. A processing device for controlling a user equipment UE performing communication with a base station BS in a wireless communication system, the processing device comprising: at least one processor; as well as at least one memory connected to the at least one processor and storing instructions, the instructions causing the UE to: receive time division duplex (TDD) configuration information for configuring a downlink (DL) time interval and an uplink (UL) time interval within a time resource period; receive first indication information specifying a first time interval related to a full-duplex operation of the BS in the time resource period; receive second indication information specifying a second time interval in the first time interval; and perform communication with the BS based on the TDD configuration information, the first indication information, and the second indication information, The second time interval is a time interval in the first time interval that can be changed to a time interval related to the half-duplex operation of the BS.

14. A method for performing communication with a user equipment UE by a base station BS in a wireless communication system, the method comprising: Sending time division duplex TDD configuration information for configuring a downlink DL time interval and an uplink UL time interval within a time resource period to the UE; Sending, to the UE, first indication information specifying a first time interval in the time resource cycle related to the full-duplex operation of the BS; Sending, to the UE, second indication information specifying a second time interval in the first time interval; as well as performing communication with the UE based on the TDD configuration information, the first indication information and the second indication information, The second time interval is a time interval in the first time interval that can be changed to a time interval related to the half-duplex operation of the BS.

15. A base station BS for performing communication with a user equipment UE in a wireless communication system, the BS comprising: Radio frequency RF transceiver; as well as a processor connected to the RF transceiver, The processor is configured to control the RF transceiver to: send time division duplex (TDD) configuration information for configuring a downlink (DL) time interval and an uplink (UL) time interval within a time resource period to the UE; send first indication information specifying a first time interval related to a full-duplex operation of the BS in the time resource period to the UE; send second indication information specifying a second time interval in the first time interval to the UE; and perform communication with the UE based on the TDD configuration information, the first indication information, and the second indication information, and The second time interval is a time interval among the first time intervals that can be changed to a time interval associated with a half-duplex operation of the BS.

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