Method for communication in wireless communication system and apparatus therefor

Abstract

A method for a terminal to transmit an uplink signal in a wireless communication system according to various embodiments and an apparatus therefor are disclosed. Disclosed are a method and an apparatus therefor, the method comprising the steps of: receiving resource allocation information on a plurality of uplink time resources from a base station; receiving configuration information about a nominal time domain window (TDM); and transmitting a demodulation reference signal (DMRS) bundled uplink signal based on the nominal TDW in a plurality of uplink signal resources, where the plurality of uplink time resources includes a first uplink time resource and a second uplink time resource distinguished based on whether there is an overlap with the downlink time resource, and setting a nominal TDW based on a boundary between the first uplink time resource and the second uplink time resource.

Description

Technical Field

[0001] A method and apparatus for transmitting a demodulation reference signal (DMRS) bundled uplink (UL) signal by a user equipment (UE) in a wireless communication system is provided. 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] The present disclosure provides a method and apparatus for significantly improving joint channel estimation efficiency by configuring a nominal time domain window (TDW) considering different channel environments between a sub-band full-duplex (SBFD) duration and a half-duplex (HD) duration and bundling uplink (UL) signals based on the nominal TDW.

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

[0007] Technical Solution

[0008] According to one aspect, a method for sending an uplink (UL) signal by a user equipment (UE) in a wireless communication system includes: receiving resource allocation information for multiple UL time resources from a base station (BS); receiving configuration information for a nominal time domain window (TDW); and sending a demodulation reference signal (DMRS) bundled UL signal in the multiple UL time resources based on the nominal TDW, wherein the multiple UL time resources include a first UL time resource and a second UL time resource distinguished based on whether the UL time resource overlaps with a DL time resource, and the nominal TDW is configured based on the configuration information and a boundary between the first UL time resource and the second UL time resource.

[0009] The nominal TDW may be sequentially allocated to a plurality of UL time resources so as not to overlap with a boundary between a first UL time resource and a second UL time resource.

[0010] The nominal TDW may be configured to always start or end at the boundary between the first UL time resource and the second UL time resource.

[0011] The configuration information may include information about the length of the TDW.

[0012] Even if the length of the TDW is shorter than the length indicated by the configuration information, the nominal TDW may end at the boundary between the first UL time resource and the second UL time resource.

[0013] The first UL time resource may be a time resource overlapping with a DL time resource, and the second UL time resource may be a time resource not overlapping with a DL time resource.

[0014] Based on the first time resource including less than a preset number of time slots, the nominal TDW may be configured only for the second UL time resource.

[0015] Based on the first time resource including a preset number or more of time slots, a nominal TDW may be configured for each of the first UL time resource and the second UL time resource.

[0016] The first UL time resource may be a time resource for sub-band full duplex (SBFD) or single frequency full duplex (SFFD), and the second UL time resource may be a time resource for half-duplex (HD) operation.

[0017] According to another aspect, a user equipment (UE) for sending an uplink (UL) signal in a wireless communication system includes: a radio frequency (RF) transceiver; and a processor connected to the RF transceiver, wherein the processor controls the RF transceiver to: receive resource allocation information for multiple UL time resources from a base station (BS), wherein the multiple UL time resources are divided into a first UL time resource and a second UL time resource based on whether the UL time resources overlap with a DL time resource; receive configuration information for a nominal time domain window (TDW); and send a UL signal bundled with a demodulation reference signal (DMRS) based on the nominal TDW in the multiple UL time resources, and the nominal TDW is configured based on the configuration information and a boundary between the first UL time resource and the second UL time resource.

[0018] According to another aspect, a method for receiving an uplink (UL) signal by a base station (BS) in a wireless communication system includes: sending resource allocation information for multiple UL time resources to a user equipment (UE); receiving configuration information for a nominal time domain window (TDW); and receiving a UL signal bundled with a demodulation reference signal (DMRS) based on the nominal TDW in the multiple UL time resources, wherein the multiple UL time resources include a first UL time resource and a second UL time resource distinguished based on whether the UL time resource overlaps with a DL time resource, and the nominal TDW is configured based on the configuration information and a boundary between the first UL time resource and the second UL time resource.

[0019] Beneficial Effects

[0020] Various embodiments may significantly improve the efficiency of joint channel estimation by configuring a nominal TDW and bundling uplink (UL) signals based on a nominal time domain window (TDW) by considering different channel environments between sub-band full-duplex (SBFD) duration and half-duplex (HD) duration.

[0021] Even though the UE may not be able to clearly distinguish between a duration for performing SBFD operation and a duration for performing HD operation at a base station (BS), the UE can ensure a gain in joint channel estimation through DMRS bundling based on a nominal TDW configured by considering a boundary between the SBFD duration and the HD duration, even if the SBFD duration and the HD duration coexist.

[0022] 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

[0023] 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.

[0024] Figure 1 The structure of an LTE system to which the embodiment is applied is illustrated.

[0025] Figure 2 The structure of an NR system to which an embodiment is applicable is illustrated.

[0026] Figure 3 The structure of an NR radio frame to which an embodiment is applicable is illustrated.

[0027] Figure 4 The time slot structure of the NR frame applicable to the implementation mode is illustrated.

[0028] Figure 5 The diagram illustrates physical channels that can be used in an embodiment and a signal transmission method using the physical channels.

[0029] Figure 6 A process in which a UE sends ACK / NACK via a PUSCH is illustrated.

[0030] Figure 7 An example of a CSI-related process is illustrated.

[0031] Figure 8 is a diagram for explaining a method of performing a full-duplex operation in an NR system.

[0032] Fig. 9 and Fig.10 is a diagram for explaining sub-band full-duplex (SBFD) and single-frequency full-duplex (SFFD) operations.

[0033] Fig.11 is a diagram for explaining a method of configuring, by a UE, a nominal time domain window (TDW) associated with a demodulation reference signal (DMRS) bundling.

[0034] Fig.12 is a diagram illustrating a method for a BS to receive a DMRS-bundled UL signal.

[0035] Fig.13 A communication system applied to the present disclosure is illustrated.

[0036] Fig.14 A wireless device suitable for use with the present disclosure is illustrated.

[0037] Fig.15 Another example of a wireless device to which the present disclosure is applied is illustrated. DETAILED DESCRIPTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] For clarity of explanation, LTE-A or 5G NR is mainly described, but the technical spirit of the implementation manner is not limited thereto.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] Figure 2 The structure of the NR system is illustrated.

[0051] 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.

[0052] Figure 3 The structure of an NR radio frame to which the present disclosure is applicable is illustrated.

[0053] 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).

[0054] 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).

[0055] 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 .

[0056] [Table 1]

[0057]

[0058]

[0059] 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.

[0060] [Table 2]

[0061] <![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

[0062] 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.

[0063] 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).

[0064] [Table 3]

[0065] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 450MHz-6000MHz 15kHz, 30kHz, 60kHz FR2 24250MHz-52600MHz 60kHz, 120kHz, 240kHz

[0066] 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).

[0067] [Table 4]

[0068] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 410MHz-7125MHz 15kHz, 30kHz, 60kHz FR2 24250MHz-52600MHz 60kHz, 120kHz, 240kHz

[0069] Figure 4 The time slot structure of the NR frame is illustrated.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] Bandwidth Part (BWP)

[0074] 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).

[0075] 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.

[0076] Figure 5 is a diagram showing physical channels that can be used in various embodiments and a signal transmission method using the physical channels.

[0077] 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.

[0078] 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.

[0079] 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).

[0080] 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).

[0081] 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 ).

[0082] 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.

[0083] 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.

[0084] Figure 6 The process of the terminal sending ACK / NACK through the PUSCH is illustrated.

[0085] 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 with PDSCH offset K0 and PDSCH with HARQ-ACK report offset K1. For example, DCI format 1_0 or DCI format 1_1 may include the following information.

[0086] - Frequency domain resource assignment: indicates the RB set assigned to PDSCH.

[0087] - 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)

[0088] -PDSCH-to-HARQ_feedback timing indicator: indicates K1

[0089] -HARQ process number (4 bits): indicates the HARQ process identifier (ID) of the data (e.g., PDSCH or TB)

[0090] -PUCCH resource indicator (PRI): indicates the PUCCH resource to be used for UCI transmission among multiple PUCCH resources in a PUCCH resource set

[0091] 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.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] Hereinafter, a PUSCH transmission procedure is described.

[0099] 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.

[0100] - Frequency domain resource assignment: indicates the RB set allocated to PUSCH.

[0101] -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.

[0102] 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.

[0103] CSI related operations

[0104] Figure 7 An example of a CSI-related process is shown.

[0105] 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.

[0106] -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.

[0107] - 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).

[0108] - 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.

[0109] -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.

[0110] -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.

[0111] 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).

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] - 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.

[0117] - For type IICSI 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.

[0118] - 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.

[0119] 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.

[0120] Semi-persistent CSI reporting performed in PUCCH format 3 or 4 supports Type IICSI feedback, but only supports part 1 of Type IICSI feedback.

[0121] QCL (quasi-isotope)

[0122] 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.

[0123] 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.

[0124] - "QCL-TypeA": {Doppler shift, Doppler spread, average delay, delay spread}

[0125] - "QCL-TypeB": {Doppler shift, Doppler spread}

[0126] - "QCL-TypeC": {Doppler shift, average delay}

[0127] - "QCL-TypeD": {spatial Rx parameters}

[0128] Beam Management (BM)

[0129] 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.

[0130] -Beam measurement: The BS or UE measures the characteristics of the received beamformed signal.

[0131] -Beam determination: The BS or UE selects its transmit (Tx) beam / receive (Rx) beam.

[0132] - Beam sweeping: Covering the spatial domain using a Tx beam and / or an Rx beam in a predetermined manner during a predetermined time interval.

[0133] -Beam reporting: The UE reports information about the beamformed signal based on beam measurements.

[0134] 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.

[0135] 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.

[0136] 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).

[0137] Full-duplex operation for NR

[0138] Figure 8 is a diagram for explaining a method of performing a full-duplex operation in an NR system.

[0139] 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.

[0140] 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).

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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).

[0145] 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.

[0146] FDR's Background

[0147] Fig. 9 and Fig.10 is a diagram for explaining sub-band full-duplex (SBFD) and single-frequency full-duplex (SFFD) operations.

[0148] 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.

[0149] For details, refer to Fig. 9 The time resources may include time resources for half-duplex (HD) operation and time resources for full-duplex (FD) operation, such as SB-FD or SS-FD. The time resources may include some time resources for SB-FD operation and the remaining time resources for HD operation, such as Fig. 9 The time resources may include the time resources for the operation of SS-FD and the remaining time resources for the operation of HD, as shown in (a). Fig. 9In this case, the unit of the time resource (for operation as SS-FD, operation as SB-FD, or operation as HD) may be a time slot or symbol unit. In the time resource for operation as SB-FD, some frequency resources may be used as DL resources, and some frequency resources may be used as UL resources.

[0150] When operating this FDR, the gNB can consider dividing the duration into half-duplex (HD) and full-duplex (FD). This can be roughly divided into sub-band full-duplex (SBFD) and single-frequency full-duplex (SFFD), and the time slot configuration and its cell resource pattern can be considered based on the following example operation.

[0151] 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 a 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.

[0152] Alternatively, SFFD may consider Fig. 9 (b) and Fig.10 For details, refer to 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.

[0153] Hereinafter, with respect to a gNB operating in SBFD (or SFFD), a time duration in which DL transmission and UL reception simultaneously exist at the same / different frequencies is defined as an SBFD slot or a SFFD slot and described.

[0154] First, hereinafter, before describing a method of performing demodulation reference signal (DMRS) bundling associated with a sub-band full duplex (SBFD) time slot or a single frequency full duplex (SFFD) time slot, technical details related to DMRS bundling are described in detail.

[0155] DMRS Bundling

[0156] As defined in the scenario (Release 17), the gNB may indicate / configure the time domain window (TDW) associated with receiving DMRS bundling to the UE. In this case, the UE may send UL signals of DMRS bundling based on the TDW. The detailed operations related thereto are detailed in Tables 5 to 8 below (see Section 6.1.7 of TS 38.214).

[0157] [Table 5]

[0158]

[0159]

[0160] [Table 6]

[0161]

[0162]

[0163] [Table 7]

[0164]

[0165] [Table 8]

[0166]

[0167]

[0168] As described in Tables 5 to 8, as an indication method related to the current DMRS bundling, the gNB may indicate to the UE the TDW to be configured for PUSCH / PUCCH repeated transmission within the maximum duration included in the capability or capability information reported from the UE. When the TDW is less than the number of repeated transmissions, the indicated / configured TDW may be repeated, and the actual TDW may start from the start of the configured TDW. Within the actual TDW, the UE may start sending UL signals (PUSCH / PUCCH) while maintaining power consistency / phase continuity. When an event occurs (such as failure to maintain power consistency and phase continuity), the actual TDW may be terminated, and a new actual TDW may be started after the event, depending on the capability of the UE. The actual TDW is terminated together with the termination of the configured TDW.

[0169] Therefore, when a gNB performing SBFD instructs repeated transmission of a UL signal on an SBFD UL slot and an HD UL slot, if the transmission frequency resources (of the UL signal) are different, this can be regarded as an event according to the existing rules. However, the SBFD UL slot may be before the (HD) UL slot in time, and therefore, in this case, even if joint channel estimation (CE) is indicated, a UE without the specified capability may perform DMRS bundling only in the SBFD slot. Even for the same frequency resources, joint CE may not be performed for the gNB due to the operation of successive interference cancellation (SIC).

[0170] In the following, taking the above-mentioned problems into consideration, an instruction method related to execution of DMRS bundling suitable for SBFD (or SFFD) by a gNB is described in detail.

[0171] DMRS bundling for SBFD

[0172] In the above scenario (3GPP TS 38 Release 17), DMRS bundling for coverage enhancement is introduced to strengthen UL coverage. This is a method for performing joint channel estimation at the receiving end of the gNB, and in this case, the UE can perform transmission that ensures phase continuity and power consistency within a specified time period. SBFD has been discussed in the above scenario (3GPP TS 38 Release 18). SBFD refers to an environment in which there is a time when transmission and reception are performed simultaneously for the gNB, and in such an environment, DMRS bundling can be indicated to enhance UL coverage. In this case, the UL transmission of the UE during the duration when the DL and UL of the gNB exist simultaneously and the UL transmission of the UE during the duration when only the UL reception of the gNB exists may have different channel environments, or even if the channel environment is the same, joint combination may not be performed due to the antenna configuration of the gNB, SIC operation, etc. In contrast, the UE may not know (as described above, the duration when the channel environment is different, or the duration when the antenna configuration and SCI operation are different), so the UE can perform transmission for DMRS bundling according to the existing configuration. Such an operation may limit the operation of the UE, but may not substantially obtain the gain of joint channel estimation. In this context, a method of indicating a time domain window (TDW) for DMRS bundling and / or a method of placing the TDW in a SBFD environment is described in detail below.

[0173] In the following, it is assumed that a UE served by a gNB operating with or working with SBFD is instructed to perform joint channel estimation to receive DMRS bundling at the gNB end. For ease of explanation, SBFD is assumed in the following explanation, but a simple extension can also be applied to SFFD.

[0174] In this specification, as far as the gNB is concerned, a time slot in which DL and UL (or DL ​​signal and UL signal) exist simultaneously is defined as a SBFD time slot, and a time slot configured as UL (UL time slot) for the UE from among the SBFD time slots is defined as a SBFD UL time slot. For the gNB, a time slot with only UL is defined as a HD UL time slot to distinguish the HD UL time slot from the SBFD UL time slot.

[0175] In existing DMRS bundling, the gNB may be instructed to provide a nominal TDW together with instructions for repeated transmissions of the UE's PUSCH or PUCCH, and the UE may place a nominal TDW for the repeatedly transmitted PUSCH or PUCCH and start the actual TDW together with the start of the nominal TDW. In this case, the UE may perform (UL signaling) transmissions to maintain phase continuity and power consistency of the DMRS bundling and terminate the actual TDW when a predefined event occurs where phase continuity or power consistency cannot be maintained. The UE may then restart the actual TDW within the nominal TDW when the UE's capabilities are supported. These events (or lists of events) may be predefined as frequency hopping, TA adjustment indicated by the gNB, Tx power changes, DL monitoring / reception, other UL transmissions, etc. (see TS38.214).

[0176] Considering that the gNB performs SBFD operation, the number of antennas used for UL Rx in the SBFD UL slot and the number of antennas used for UL Rx in the HD UL slot may be different from each other. Alternatively, depending on the gNB implementation, SIC may be performed and the effective channel may be different in the SBFD UL slot and the HD UL slot. However, in this case, when the UE repeatedly transmits PUSCH or PUCCH according to the existing configuration, the UE operation may be limited to repeatedly transmitting PUSCH or PUCCH for DMRS bundling, but actual DMRS bundling may be difficult, making it difficult to obtain the effect of UL coverage enhancement.

[0177] Therefore, in order to solve these problems, the following options can be considered. The options described below can generally be applied to PUSCH repetition transmission and PUCCH repetition transmission. Alternatively, the options described below can be selectively applied to PUSCH repetition transmission, PUSCH repetition transmission based on available time slots, and PUCCH repetition transmission, respectively. The options described below can be applied to all or some UL repetition transmissions for which joint channel estimation is to be configured among the repetition transmissions of the UL channel sent by the UE, such as PUSCH repetition transmission type A, PUSCH repetition transmission type B, PUCCH repetition transmission, and dynamic PUCCH repetition transmission. The configured TDW described below may refer to the nominal TDW in the above scenarios (3GPP TS 38.213, 214, 331, etc.).

[0178] The SBFD UL time slots and HD UL time slots described below will be explained under the following circumstances, that is, assuming that the gNB explicitly indicates to the UE that some UL time slots of the UE are SBFD UL time slots and the remaining UL time slots are HD UL time slots, or even if there is no direct instruction for the SBFD UL time slots, the UE identifies / recognizes that some UL time slots of the UE are SBFD UL time slots and the remaining time slots are HD UL time slots according to an implicit configuration or rule. In the following description, it is assumed that the UE can be explicitly indicated by the BS by determining the time slot format for the SBFD time slot from among a plurality of time slots, or can identify the SBFD time slot from among a plurality of time slots based on the BWP switching time information and / or time information (or time resources) related to RBs not used by the same BWP.

[0179] In the following description, it is assumed that switching of SBFD and HD operations is performed using SBFD UL slots and HD UL slots, and the instruction to the UE for switching is at the slot level, but it is obvious that the instruction method can be extended and applied to the symbol level. For example, in the following description, the boundary between the SBFD UL slot and the HD UL slot is assumed to be a slot boundary, but this can be extended to the symbol level, and the following options can be applied as SBFD UL symbols and HD UL symbols.

[0180] (1) Alternative 1

[0181] In Alternative 1, the above events may be (additionally) defined based on the boundary between a SBFD UL slot (or SBFD UL symbol) and a HD UL slot (or HD UL symbol).

[0182] The gNB may indicate the SBFD time slot to the UE through RRC / MAC-CE / DCI, etc., or the UE may implicitly determine that certain time slots from among the UL time slots are indicated as SBFD time slots. In this way, when repeated transmission of PUSCH or PUCCH and DMRS bundling are indicated together on the SBFD UL time slot configured as UL and the HD UL time slot among the SBFD time slots indicated by the gNB or determined by the UE, the UE can determine the boundary between the SBFD UL time slot and the HD UL time slot by the occurrence of an event (e.g., an event at which the actual TDW ends). Regardless of the capabilities of the UE, after the above event (or after the event ends), the UE can always (re)perform Tx for DMRS bundling. That is, the boundary between the SBFD UL time slot and the HD UL time slot may be a semi-static event, and the actual TDW may terminate just before such an event, and when the configured TDW is not terminated, the actual TDW may (re)start after the event.

[0183] (2) Alternative 2

[0184] In Alternative 2, the UE may determine whether an event occurs based on the boundary of the SBFD UL slot (or SBFD UL symbol) and the HD UL slot (or UL symbol) and a predetermined condition.

[0185] In the case of the above-mentioned alternative scheme 1, since events frequently occur at each SBFD time slot and HD time slot boundary point, the actual TDW may (re)start for each event occurrence, and the gain of DMRS bundling may be significantly reduced due to the frequent (re)start of the actual TDW. Therefore, it is possible to additionally consider adding specific conditions to the above-mentioned alternative scheme 1 to reduce the frequency of event occurrence (i.e., thereby further increasing the DMRS bundling gain). For example, the time slots may be configured in the following order of HD time slots, SBFD time slots, and HD time slots. In this case, when the number of SBFD time slots located in the middle is less than a certain number, it can be determined that the event has not occurred (in other words, the event can only be determined when the number of SBFD time slots is greater than a certain level). That is, when the number of SBFD time slots is less than a certain number, the boundary between the SBFD time slot and the HD time slot can be determined as not an event occurrence. As another example, when the time slots are configured in the order of the HD time slot, the SBFD time slot, and the HD time slot in the same manner as described above, the time slot boundary changing from the HD time slot to the SBFD time slot may be determined as an event (event occurrence), but the time slot boundary changing from the SBFD time slot to the HD time slot may be determined as not an event (or event occurrence). Alternatively, conversely, the time slot boundary changing from the SBFD time slot to the HD time slot may be determined as an event (event occurrence), but the time slot boundary changing from the HD time slot to the SBFD time slot may be determined as not an event (or event occurrence).

[0186] Alternatively, whether a special TX (spatial) filter is applied to a FD slot (or SBFD slot) may vary depending on whether the (SBFD) FD slot defines different in-band emission requirements from the HD slot. Even for UEs with FD capabilities, whether a Tx spatial filter is applied to the FD slot may vary depending on the detailed capabilities. Therefore, based on the capabilities of the UE, different spatial filters or Tx filters may be applied between transmissions in the SBFD UL slot and transmissions in the HD UL slot. Alternatively, for UEs with the above capabilities (e.g., different Tx filters applicable to each of the SBFD slot and the HD slot), in addition to the beams indicated by the SRI in the SBFD UL slot and the HD UL slot, new Tx filters or spatial filters may be defined and applied (to reduce transmissions through the Tx filter, etc.). Therefore, as far as the network is concerned, it is possible to choose to reduce transmissions through the TX filter or to improve the UL coverage of the corresponding UE through UL joint RX. In this case, as far as the network is concerned, the gNB can indicate that different Tx filters are applied to the UL Tx in the SBFD UL slots and HD UL slots of the UE when reducing the transmission through the TX filter. In this case, the boundary between the SBFD UL slot and the HD UL slot can be regarded as an event. Such an event is defined as a semi-static event to prevent the joint CE gain due to DMRS bundling from being reduced along the boundary between the SBFD UL slot and the HD UL slot.

[0187] (3) Alternative 3

[0188] In alternative 3, the boundary between the SBFD UL slot (SBFD UL symbol) and the HD UL slot (or UL symbol) may be the start point and / or end point of the nominal TDW, or may be configured as the start point and / or end point of the nominal TDW.

[0189] In detail, the existing nominal TDW is placed in the UL time slot or in the UL time slot to be determined as available. Alternatively, the nominal TDW can be placed by distinguishing between the SBFD UL time slot and the HD UL time slot. In other words, the nominal TDW can be placed for each of the SBFD UL time slot and the HD UL time slot.

[0190] For example, the nominal TDW may always terminate at the boundary between the SBFD UL time slot and the HD UL time slot. In this case, the nominal TDW may be restarted at the boundary between the SBFD UL time slot and the HD UL time slot when there is any repeated transmission. In other words, the nominal TDW may always end with the end of the SBFD UL time slot and may (re)start with the beginning of the subsequent HD UL time slot. For example, when the length of the nominal TDW is configured as 4, the 6 time slots for the UL repeated transmission of the UE may be configured as SBFD UL->SBFD UL->SBFD UL->(HD)UL->(HD)UL->(HD)UL (i.e., when the UE knows information about the SBFD UL time slot and the HD UL time slot). In this case, the first nominal TDW may be placed in the first time slot, the second time slot, and the third time slot, and the second nominal TDW may be placed in the fourth time slot, the fifth time slot, and the sixth time slot.

[0191] Alternatively, the BS may determine the size of the TDW by considering the boundary between the SBFD UL slot and the HD UL slot. In this case, when 6 slots are configured for UL repetition transmission of the UE and the length of the nominal TDW is 3, the UE may place a first TDW for the first slot to the third slot (3 slots) and a second TDW for the fourth slot to the sixth slot.

[0192] The UE may be explicitly instructed by the BS through slot format determination for the SBFD slot from among multiple slots, or may identify the SBFD slot from among multiple slots based on BWP switching time information and / or time information (or time resources) related to RBs not used by the same BWP.

[0193] (4) Alternative 4

[0194] In alternative 4, DMRS bundling may not be performed in SBFD UL timeslots (or UL symbols). That is, even if the UE receives a configuration / instruction for joint CE, the UE may perform DMRS bundling only for the HD UL timeslots and not for the SBFD UL timeslots. That is, the UE may place the nominal TDW only in the HD UL timeslots as in the existing operation, and perform UL transmission for DMRS bundling only within the actual TDW configured according to whether an event occurs within the nominal TDW. In other words, the nominal TDW is (assumed and) placed only in the HD UL timeslots, and the nominal TDW (or the configured TDW) may not be placed in the SBFD UL timeslots. In this case, the UE may not perform Tx for DMRS bundling in the SBFD UL timeslots.

[0195] (5) Alternative 5

[0196] In Alternative 5, different nominal TDWs may be configured for SBFD UL timeslots (SBFD UL symbols) and HD UL timeslots (HD UL symbols).

[0197] In detail, when a UE receiving a service from a gNB capable of SBFD operation has an SBFD UL timeslot among the configured UL timeslots, the UE may be configured with DMRS bundling from the gNB. In this case, the UE may assume / determine to configure two nominal TDWs. For example, the UE may be configured with two nominal TDWs, the first nominal TDW to be placed in the SBFD UL timeslot, and the second nominal TDW to be placed in the HD UL timeslot, and each of the first nominal TDW and the second nominal TDW may be placed in only one of the SBFD UL timeslot and the HD UL timeslot. In this case, the UE may configure an actual TDW in each of the first nominal TDW and the second nominal TDW according to existing rules (e.g., whether a previously defined event occurs). Alternatively, the nominal TDW configured according to the existing rules may be used as the nominal TDW to be placed in the HD UL timeslot, and a nominal TDW having a new nominal TDW length based on a previous agreement or calculated from the nominal TDW length placed in the HD UL timeslot may be placed in the SBFD UL timeslot. In other words, when the UE configures the first nominal TDW for the HD UL time slot according to the existing configuration method, the UE may calculate or determine the length of the second nominal TDW for the SBFD UL time slot according to the length of the first nominal TDW based on the predefined method, and place the second nominal TDW having the calculated length in the SBFD UL time slot. For example, when the UE determines the length of the nominal TDW for the HD time slot to be 3 according to the existing method, the UE may determine the length of the nominal TDW for the SBFD UL time slot to be 2, which is 3 minus 1 (or plus a specific value).

[0198] (6) Alternative 6

[0199] In alternative 6, the gNB may configure a nominal TDW used only in HD UL slots (HD UL symbols) and may not place the nominal TDW in SBFD UL slots (symbols). However, when the UE is configured for DMRS bundling, the UE may always perform Tx for DMRS bundling. In other words, when DMRS bundling is indicated to the UE, even if the nominal TDW is not configured for the SBFD UL slot and thus the nominal TDW is not placed in the SBFD UL slot, the UE may transmit an UL signal by performing DMRS bundling for the SBFD UL slot.

[0200] For example, the SBFD UL timeslot may be placed as several timeslots between DL and UL, and thus a UE configured with a joint CE may always perform Tx of DMRS bundling for the SBFD UL timeslot. That is, the UE determines that DMRS bundling is implicitly indicated in the SBFD UL timeslot. In other words, when the nominal TDW for DMRS bundling for the HD timeslot is configured, the UE may send a DMRS bundled UL signal in the SBFD UL timeslot even if DMRS bundling is not separately indicated for the SBFD UL timeslot.

[0201] Fig.11 is a diagram for explaining a method of configuring, by a UE, a nominal TDW associated with DMRS bundling.

[0202] Reference Fig.11 , the UE may receive resource allocation information for allocating a plurality of UL time resources for transmission of a UL signal (S111). The resource allocation information may be a DCI for scheduling transmission or repeated transmission of a UL signal. Here, the plurality of UL time resources may include a first UL time resource overlapping with a DL time resource for a DL signal in the time domain and a second UL time resource not overlapping with the DL time resource in the time domain, as described in the section "DMRS bundling for SBFD". In other words, the plurality of UL time resources may be divided into a first UL time resource overlapping with a DL time resource in the time domain and a second UL time resource not overlapping with the DL time resource in the time domain. As described above, the first UL time resource may be an SBFD UL time slot, and the second UL time resource may be an HD UL time slot. For example, the plurality of UL time resources may include a plurality of consecutive SBFD UL time slots in the time domain and a plurality of consecutive HD UL time slots in the time domain. That is, the first UL time resource may include at least one UL time slot, and the second UL time resource may include at least one UL time slot. The BS may be a network or a gNB.

[0203] For example, the BS may explicitly indicate to the UE through the time slot format that the first UL time resource among the multiple UL time resources is an SBFD time slot and the second UL time resource is an HD time slot. Alternatively, the UE may identify the first UL time resource and the second UL time resource from the multiple time slots based on the BWP switching time information related to the multiple UL time resources and / or the RB related time information (or time resource) not used by the same BWP. Through this identification, the UE can identify / estimate the boundary between the above-mentioned first UL time resource and the second UL time resource from the multiple UL time resources.

[0204] Then, the UE may receive configuration information for configuring the nominal TDW from the BS (S113). The nominal TDW may be a duration configured for DMRS bundling for a UL signal, as a duration for which the UE repeatedly transmits the UL signal while maintaining power consistency and phase continuity, as described in the section "DMRS bundling for SBFD". The UE may repeatedly transmit the UL signal while maintaining power consistency and phase continuity within the nominal TDW. The configuration information may include information for configuring the nominal TDW by considering the boundary between the first UL time resource and the second UL time resource, as described above. For example, the configuration information may include information on the size or length of the nominal TDW determined based on the maximum duration for which power consistency and phase continuity can be maintained included in the capability information reported by the UE. Alternatively, the configuration information may include information on the size or length of the nominal TDW determined based on the capability information and the boundary between the first UL time resource and the second UL time resource. The configuration information may be sent to the UE together with the resource allocation information via DCI.

[0205] Alternatively, the UE may configure at least one nominal TDW based on the configuration information and the boundary between the first UL time resource and the second UL time resource (hereinafter referred to as the time resource boundary). For example, the UE may configure multiple nominal TDWs for multiple UL time resources based on the time resource boundary and the configuration information. In detail, the UE may place the nominal TDW corresponding to the size of the nominal TDW included in the configuration information sequentially on multiple UL time resources. However, the UE may be configured so that one nominal TDW does not overlap or cross the time resource boundary. That is, the UE may place the nominal TDW having the size of the nominal TDW sequentially on multiple UL time resources, but may configure / determine that the nominal TDW (always) ends at the time resource boundary so that the nominal TDW does not overlap with the time resource boundary. Alternatively, the UE may configure / determine that the nominal TDW always starts at the time resource boundary so that the nominal TDW does not overlap with the time resource boundary. In this case, the nominal TDW is placed not to overlap with the time resource boundary, and thus a nominal TDW having a shorter length than the size of the TDW indicated by the configuration information may be configured from among the nominal TDWs placed / configured for a plurality of UL time resources.

[0206] For example, through the configuration information, it may be indicated that the size (or length) of the nominal TDW is 4, and a UL time slot that sequentially includes 3 consecutive SBFD UL time slots (or the first UL time resource) and 4 consecutive HD UL time slots (or the second UL time resource) may be allocated. In this case, the UE may configure the nominal TDW to have a length of three time slots for the SBFD UL time slot so that the nominal TDW ends at the boundary between the SBFD time slot and the HD time slot. Then, the UE may configure the nominal TDW that starts at the boundary and has a length of four time slots for the HD UL time slot. In this way, even if the size of the TDW is indicated as 4 by the configuration information, a nominal TDW of size 3 may be configured for the SBFD UL time slot, which is the first UL time resource. That is, the UE may place / configure the nominal TDW according to the length of the nominal TDW included in the configuration information, and may place / configure the nominal TDW in such a manner that the nominal TDW always ends and / or starts at the boundary between the SBFD time slot and the HD time slot.

[0207] Alternatively, the UE may configure / determine the nominal TDW by further considering the number of time slots included in the first UL time resource. For example, if the number of time slots included in the first UL time resource is less than a preset threshold number, the UE may configure the nominal TDW only for the second UL time resource without configuring the nominal TDW for the first UL time resource. In this case, the nominal TWD may be configured to start from a time resource boundary in the second UL time resource while having a size according to the configuration information. In contrast, when the number of time slots included in the first UL time resource is greater than or equal to a preset threshold number, the UE may sequentially configure / determine the nominal TDW for each of the first UL time resource and the second UL time resource by considering the configuration information and the time resource boundary.

[0208] Then, the UE may repeatedly transmit the DMRS-bundled UL signal based on the configured nominal TDW (or multiple TDWs) (S115). For example, the UE may repeatedly transmit the UL signal within the nominal TDW while maintaining power consistency and phase continuity so that the DMRS is bundled. For example, as described in Tables 5 to 8, the above-mentioned terminal may transmit or repeatedly transmit an uplink signal bundled with or for DMRS bundling based on the configured nominal TDW.

[0209] Fig.12 is a diagram illustrating a method for a BS to receive a DMRS-bundled UL signal.

[0210] Reference Fig.12, the BS may send resource allocation information to the UE, the resource allocation information allocating multiple UL time resources for transmission of UL signals (S121). The resource allocation information may be a DCI for scheduling transmission or repeated transmission of UL signals. Here, the multiple UL time resources may include a first UL time resource overlapping with a DL time resource for a DL signal in the time domain and a second UL time resource not overlapping with the DL time resource in the time domain, as described in the section "DMRS bundling for SBFD". As described above, the first UL time resource may be an SBFD UL time slot, and the second UL time resource may be an HDUL time slot.

[0211] The BS may then send configuration information for configuring a nominal TDW to the UE (S123). The nominal TDW may be a duration configured for DMRS bundling for a UL signal, as a duration for which the UE repeatedly transmits the UL signal while maintaining power consistency and phase continuity, as described in the section “DMRS bundling for SBFD”. In this case, the BS may receive the repeatedly transmitted UL signal within the nominal TDW while maintaining power consistency and phase continuity. The configuration information may include information about the size or length of the nominal TDW determined based on the maximum duration for which power consistency and phase continuity may be maintained included in the capability information reported by the UE. Alternatively, the configuration information may include information about the size or length of the nominal TDW determined based on the capability information and a boundary between the first UL time resource and the second UL time resource. The BS may send the configuration information and the resource allocation information together to the UE via DCI.

[0212] Alternatively, the BS may anticipate configuring the nominal TDW based on the time resource boundary as configuration information and the boundary between the first UL time resource and the second UL time resource (hereinafter referred to as the time resource boundary). For example, the BS may predict / anticipate configuring at least one nominal TDW for multiple UL time resources based on the size of the TDW included in the configuration information, and the nominal TDW always ends or starts at the time resource boundary. For example, the BS may anticipate that a nominal TDW having a TDW size included in the configuration information may be sequentially placed on multiple UL time resources, but may predict / anticipate that the nominal TDW (always) ends at the time resource boundary so that the nominal TDW does not overlap with the time resource boundary. In this case, the nominal TDW is placed so as not to overlap with the time resource boundary, and therefore the BS may predict configuring a nominal TDW having a length shorter than the TDW size indicated by the configuration information from among the nominal TDWs placed / configured for multiple UL time resources.

[0213] Alternatively, the BS may anticipate configuring / determining the nominal TDW by further considering the number of time slots included in the first UL time resource. For example, if the number of time slots included in the first UL time resource is less than a preset threshold number, the BS may anticipate configuring the nominal TDW only for the second UL time resource without configuring the nominal TDW for the first UL time resource. In this case, the BS may not expect DMRS bundling for the UL signal sent on the first UL time resource.

[0214] Then, the BS may repeatedly receive the DMRS-bundled UL signal based on the configured nominal TDW (or multiple TDWs) (S125). For example, the BS may expect to maintain power consistency and phase continuity within the nominal TDW and receive the DMRS-bundled UL signal within the nominal TDW.

[0215] In this way, when the BS performs SBFD operation, the proposed method can configure the nominal TDW by considering the different channel environments between the SBFD (sub-band full-duplex) duration and the HD (half-duplex) duration and bundle the UL signal based on this, thereby significantly improving the efficiency of the joint channel estimation. Alternatively, by additionally considering the boundary between the SBFD duration and the HD duration to configure the nominal TDW, even when the SBFD duration and the HD duration coexist, it is possible to ensure that the gain of the joint channel estimation based on DMRS bundling is the maximum value.

[0216] Communication system example to which the present disclosure is applied

[0217] 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.

[0218] 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.

[0219] Fig.13 A communication system applied to the present disclosure is illustrated.

[0220] Reference Fig.13, 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.

[0221] 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.

[0222] 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.

[0223] Examples of wireless devices to which the present disclosure is applied

[0224] Fig.14 A wireless device suitable for use with the present disclosure is illustrated.

[0225] Reference Fig.14 , 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.13 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0226] 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.

[0227] 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 9 to 12 At least one procedure of operations related to the described embodiments.

[0228] In detail, the processor 102 may control the RF transceiver 106 to receive resource allocation information for a plurality of UL time resources from the BS, the plurality of UL time resources being divided into a first UL time resource and a second UL time resource based on whether the UL time resource overlaps with a DL time resource, receive configuration information for a nominal time domain window (TDW), and transmit a demodulation reference signal (DMRS) bundled UL signal based on the nominal TDW in the plurality of UL time resources. Here, the nominal TDW may be configured based on the configuration information and a boundary between the first UL time resource and the second UL time resource.

[0229] Alternatively, a chipset including a processor 102 and a memory 104 may be provided. In this case, the chipset may include at least one processor and at least one memory, the at least one memory being operatively connected to the at least one processor and configured to cause the at least one processor to perform operations when executed, the operations including: receiving resource allocation information for a plurality of UL time resources from a BS, the plurality of UL time resources being divided into a first UL time resource and a second UL time resource based on whether the UL time resources overlap with a DL time resource; receiving configuration information for a nominal time domain window (TDW); and sending a demodulation reference signal (DMRS) bundled UL signal based on the nominal TDW in the plurality of UL time resources. Here, the nominal TDW may be configured based on the configuration information and a boundary between the first UL time resource and the second UL time resource. The at least one processor may execute the reference signal based on a program contained in the memory. Figures 9 to 12 The operation of the embodiments is described.

[0230] A computer-readable storage medium including at least one program may be provided, the at least one program causing the at least one processor to perform the operation, the operation including: receiving resource allocation information for a plurality of UL time resources from a BS, the plurality of UL time resources being divided into a first UL time resource and a second UL time resource based on whether the UL time resource overlaps with a DL time resource; receiving configuration information for a nominal time domain window (TDW); and transmitting a demodulation reference signal (DMRS) bundled UL signal based on the nominal TDW in the plurality of UL time resources. The computer program may include a computer program capable of executing a reference signal. Figures 9 to 12 The procedures for the operation of the embodiments are described.

[0231] 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.

[0232] 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 or the RF transceiver to send resource allocation information for a plurality of UL time resources to the UE, receive configuration information for a nominal time domain window (TDW), and receive a UL signal bundled with a demodulation reference signal (DMRS) based on the nominal TDW in the plurality of UL time resources. Here, the plurality of UL time resources may include a first UL time resource and a second UL time resource distinguished based on whether the UL time resource overlaps with the DL time resource, and the nominal TDW may be configured based on the configuration information and a boundary between the first UL time resource and the second UL time resource.

[0233] 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.

[0234] 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.

[0235] 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.

[0236] 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.

[0237] Application examples of wireless devices to which the present disclosure is applied

[0238] Fig.15 Another example of a wireless device to which the present disclosure is applied is shown.

[0239] Reference Fig.15 , the wireless devices 100 and 200 may correspond to Fig.14The 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.14 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Fig.14 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.

[0240] 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.13 100a), vehicles ( Fig.13 100b-1 and 100b-2), XR devices ( Fig.13 100c), handheld device ( Fig.13 100d), household appliances ( Fig.13 100e), IoT devices ( Fig.13 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.13 400), BS( Fig.13 200), network nodes, etc. The wireless device can be used in a mobile or fixed location according to the usage example / service.

[0241] exist Fig.15In 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.

[0242] 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.

[0243] 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.

[0244] 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).

[0245] 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.

[0246] 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.

[0247] 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.

[0248] Industrial Applicability

[0249] The above-mentioned embodiments of the present disclosure may be applicable to various mobile communication systems.

Claims

1. A method for transmitting an uplink (UL) signal by a user equipment (UE) in a wireless communication system, the method comprising: receiving resource allocation information for a plurality of UL time resources from a base station BS; Receiving configuration information for a nominal time domain window TDW; as well as sending a UL signal bundled with a demodulation reference signal (DMRS) based on the nominal TDW in the plurality of UL time resources, The plurality of UL time resources include a first UL time resource and a second UL time resource distinguished based on whether the UL time resource overlaps with a DL time resource, and The nominal TDW is configured based on the configuration information and a boundary between the first UL time resource and the second UL time resource.

2. The method according to claim 1, wherein: The nominal TDW is sequentially allocated to the plurality of UL time resources so as not to overlap with the boundary between the first UL time resource and the second UL time resource.

3. The method according to claim 1, wherein: The nominal TDW is configured to always start or end at the boundary between the first UL time resource and the second UL time resource.

4. The method according to claim 1, wherein: The configuration information includes information about the length of the TDW.

5. The method according to claim 4, wherein: Even if the length of the TDW is shorter than the length indicated by the configuration information, the nominal TDW ends at the boundary between the first UL time resource and the second UL time resource.

6. The method according to claim 1, wherein: The first UL time resource is a time resource overlapping with the DL time resource, and the second UL time resource is a time resource not overlapping with the DL time resource.

7. The method according to claim 6, wherein: Based on the first time resource including less than a preset number of time slots, the nominal TDW is configured only for the second UL time resource.

8. The method according to claim 6, wherein: The nominal TDW is configured for each of the first UL time resource and the second UL time resource based on the first time resource including a preset number or more of time slots.

9. The method according to claim 1, wherein: The first UL time resource is a time resource for sub-band full-duplex SBFD or single-frequency full-duplex SFFD, and the second UL time resource is a time resource for half-duplex HD operation. 10 . A computer-readable recording medium having recorded thereon a program for executing the method according to claim 1 .

11. A user equipment UE for sending an uplink UL signal in a wireless communication system, the UE comprising: Radio frequency RF transceiver; as well as a processor connected to the RF transceiver, wherein the processor controls the RF transceiver to receive resource allocation information for a plurality of UL time resources from a base station BS, the plurality of UL time resources being divided into a first UL time resource and a second UL time resource based on whether the UL time resources overlap with a DL time resource, receive configuration information for a nominal time domain window TDW, and transmit a UL signal bundled with a demodulation reference signal DMRS based on the nominal TDW in the plurality of UL time resources, and The nominal TDW is configured based on the configuration information and a boundary between the first UL time resource and the second UL time resource.

12. A chipset for receiving an uplink (UL) signal from a user equipment (UE) in a wireless communication system, the chipset comprising: at least one processor; as well as at least one memory operatively connected to the at least one processor and configured to, when executed, cause the at least one processor to perform operations, The operation includes: receiving resource allocation information for a plurality of UL time resources from a base station BS, wherein the plurality of UL time resources are divided into a first UL time resource and a second UL time resource based on whether the UL time resources overlap with a DL time resource, receiving configuration information for a nominal time domain window TDW, and sending a UL signal bundled with a demodulation reference signal DMRS based on the nominal TDW in the plurality of UL time resources, and The nominal TDW is configured based on the configuration information and a boundary between the first UL time resource and the second UL time resource.

13. A method for receiving an uplink (UL) signal by a base station (BS) in a wireless communication system, the method comprising: Sending resource allocation information for a plurality of UL time resources to a user equipment UE; Receiving configuration information for a nominal time domain window TDW; as well as receiving a UL signal bundled with a demodulation reference signal (DMRS) based on the nominal TDW in the plurality of UL time resources, The plurality of UL time resources include a first UL time resource and a second UL time resource distinguished based on whether the UL time resource overlaps with a DL time resource, and The nominal TDW is configured based on the configuration information and a boundary between the first UL time resource and the second UL time resource.

14. The method according to claim 13, wherein: The configuration information includes information about a length of the nominal TDW determined based on a boundary between the first UL time resource and the second UL time resource.

15. A base station BS for receiving an uplink UL signal in a wireless communication system, the BS comprising: Radio frequency RF transceiver; as well as a processor connected to the RF transceiver, The processor controls the RF transceiver to send resource allocation information for a plurality of UL time resources to a user equipment UE, receive configuration information for a nominal time domain window TDW, and receive a UL signal bundled with a demodulation reference signal DMRS based on the nominal TDW in the plurality of UL time resources, and The multiple UL time resources include a first UL time resource and a second UL time resource distinguished based on whether the UL time resource overlaps with a DL time resource, and the nominal TDW is configured based on the configuration information and a boundary between the first UL time resource and the second UL time resource.

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