Signal transmission / reception method for wireless communication and apparatus therefor

Abstract

In a wireless communication system according to various embodiments, a terminal receives first configuration information for configuring a bandwidth portion (BWP) from a base station, receives second configuration information including information on an offset and a bandwidth size for configuring at least one subband within the BWP from the base station, and configures the at least one subband based on the second configuration information, the at least one sub-band may be configured based on the offset, the bandwidth size, and a particular granularity determined according to the size of the system bandwidth.

Description

Technical Field

[0001] The present disclosure relates to wireless communication, and more particularly, to a method of transmitting or receiving an uplink / downlink signal in a wireless communication system and an apparatus thereof. Background Art

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

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

[0004] Technical issues

[0005] An object of the present disclosure is to provide a more accurate and efficient method of transmitting and receiving signals.

[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] In one aspect of the present disclosure, a method for communicating between a UE and a base station in a wireless communication system is provided herein. The method may include: receiving first configuration information for configuring a bandwidth part (BWP) from the base station; receiving second configuration information from the base station, the second configuration information including information about an offset and a bandwidth size for configuring at least one subband; and configuring at least one subband within the BWP based on the second configuration information. The at least one subband may be configured based on the offset, the bandwidth size, and a specific granularity determined according to the size of the system bandwidth.

[0009] Alternatively, the boundary of at least one subband may be aligned with a grid of resource block groups (RBGs) configured for the BWP based on an offset, bandwidth size, and a specific granularity.

[0010] Alternatively, the specific granularity may be determined as a resource block group (RBG) size or a multiple of the RBG size, the RBG size being determined based on the size of the system bandwidth.

[0011] Alternatively, the specific granularity may be determined as a minimum resource block group (RBG) size or a multiple of the minimum RBG size that allows the same precoding to be applied within the system bandwidth.

[0012] Alternatively, the second configuration information may further include indication information indicating M (where M is an integer) associated with a specific granularity, wherein the specific granularity may be determined as a value obtained by multiplying an RBG size determined based on a size of the system bandwidth by M.

[0013] Alternatively, the starting position of the at least one subband is determined based on a value obtained by multiplying the offset by the specific granularity, wherein the size of the at least one subband may be determined based on a value obtained by multiplying the bandwidth size by the specific granularity.

[0014] Alternatively, at least one subband may be configured only for a specific time interval of full-duplex operation of the base station.The at least one subband may include at least one of a first subband for downlink or a second subband for uplink.

[0015] Alternatively, at least one subband may be configured only for a specific time interval of full-duplex operation of the base station.

[0016] Alternatively, the UE may determine that the BWP is configured with only remaining frequency resources except for at least one frequency resource overlapping with at least one subband among a plurality of frequency resources configured for the BWP within a specific time interval.

[0017] Alternatively, the second configuration information may be a Radio Resource Control (RRC) parameter for a cell-specific group or a UE-specific group.

[0018] In another aspect of the present disclosure, a UE for communicating with a base station in a wireless communication system is provided herein. The UE may include a radio frequency (RF) transceiver and a processor connected to the RF transceiver. The processor may control the RF transceiver to perform operations, the operations including: receiving first configuration information for configuring a bandwidth part (BWP) from a base station; receiving second configuration information from the base station from the base station, the second configuration information including information about an offset and a bandwidth size for configuring at least one subband within the BWP; and configuring at least one subband based on the second configuration information. At least one subband may be configured based on an offset, a bandwidth size, and a specific granularity determined according to a size of a system bandwidth.

[0019] In another aspect of the present disclosure, a processing device for controlling a UE in a wireless communication system is provided herein. The processing device may include at least one processor, and at least one memory connected to the at least one processor and storing instructions, which, when executed by the at least one processor, causes the UE to perform operations. The operations may include: receiving first configuration information for configuring a bandwidth part (BWP) from a base station; receiving second configuration information from the base station from the base station, the second configuration information including information about an offset and a bandwidth size for configuring at least one subband within the BWP; and configuring at least one subband based on the second configuration information. At least one subband may be configured based on an offset, a bandwidth size, and a specific granularity determined according to the size of the system bandwidth.

[0020] In another aspect of the present disclosure, a method for communicating with a UE by a base station in a wireless communication system is provided herein. The method may include: sending first configuration information for configuring a bandwidth part (BWP) to the UE; and sending second configuration information to the UE, the second configuration information including information about an offset and a bandwidth size for configuring at least one subband within the BWP. The at least one subband may be configured based on the offset, the bandwidth size, and a specific granularity determined according to the size of the system bandwidth.

[0021] Beneficial Effects

[0022] According to the embodiments of the present disclosure, signal transmission and reception in a wireless communication system can be performed more accurately and efficiently.

[0023] 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

[0024] 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.

[0025] Figure 1 The structure of an LTE system to which the embodiment is applied is illustrated.

[0026] Figure 2 The structure of an NR system to which an embodiment is applicable is illustrated.

[0027] Figure 3 The structure of an NR radio frame to which an embodiment is applicable is illustrated.

[0028] Figure 4 The time slot structure of the NR frame applicable to the implementation mode is illustrated.

[0029] Figure 5 The diagram illustrates physical channels that can be used in an embodiment and a signal transmission method using the physical channels.

[0030] Figure 6 A process in which a UE sends ACK / NACK via a PUSCH is illustrated.

[0031] Figure 7 An example of a CSI-related process is illustrated.

[0032] Figure 8 is a diagram for explaining a method of performing a full-duplex operation in an NR system.

[0033] Fig. 9 and Fig.10 is a diagram for explaining sub-band full-duplex (SBFD) and single-frequency full-duplex (SFFD) operations.

[0034] Fig.11 is a diagram illustrating an enhanced BWP configured for FDR operation of a base station.

[0035] Fig.12 A method of allocating frequency resources for a UL BWP and a DL BWP adjacent to each other is illustrated.

[0036] Fig.13 A method for configuring at least one subband by a UE is illustrated.

[0037] Fig.14 A method for configuring at least one subband for a UE by a base station is illustrated.

[0038] Fig.15 A communication system applied to the present disclosure is illustrated.

[0039] Fig.16 A wireless device suitable for use with the present disclosure is illustrated.

[0040] Fig.17 Another example of a wireless device to which the present disclosure is applied is illustrated. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] For clarity of explanation, LTE-A or 5G NR is mainly described, but the technical spirit of the implementation manner is not limited thereto.

[0048] 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.

[0049] 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 UE (UT), a subscriber station (SS), a mobile UE (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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] Figure 2 The structure of the NR system is illustrated.

[0054] 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. The gNB and eNB are connected to each other via an Xn interface. The gNB and eNB are connected to the 5G core network (5GC) via an NG interface. More specifically, the gNB and eNB are connected to the access and mobility management function (AMF) via the NG-C interface, and to the user plane function (UPF) via the NG-U interface.

[0055] Figure 3 The structure of an NR radio frame to which the present disclosure is applicable is illustrated.

[0056] 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).

[0057] 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).

[0058] 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 .

[0059] [Table 1]

[0060] <![CDATA[SCS(15*2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 15KHz(u=0) 14 10 1 30KHz(u=1) 14 20 2 60KHz(u=2) 14 40 4 120KHz(u=3) 14 80 8 240KHz(u=4) 14 160 16

[0061] 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.

[0062] [Table 2]

[0063] <![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

[0064] 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.

[0065] 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).

[0066] [Table 3]

[0067] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 450MHz-6000MHz 15kHz, 30kHz, 60kHz FR2 24250MHz-52600MHz 60kHz, 120kHz, 240kHz

[0068] 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).

[0069] [Table 4]

[0070] Frequency range specification Corresponding frequency range Subcarrier Spacing (SCS) FR1 410MHz-7125MHz 15kHz, 30kHz, 60kHz FR2 24250MHz-52600MHz 60kHz, 120kHz, 240kHz

[0071] Figure 4 The time slot structure of the NR frame is illustrated.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] Bandwidth Part (BWP)

[0076] 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).

[0077] 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.

[0078] Figure 5 is a diagram showing physical channels that can be used in various embodiments and a signal transmission method using the physical channels.

[0079] 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.

[0080] 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.

[0081] 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).

[0082] 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).

[0083] 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 ).

[0084] 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.

[0085] 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.

[0086] Figure 6 The process of the terminal sending ACK / NACK through the PUSCH is illustrated.

[0087] Reference Figure 6 , the UE may detect the PDCCH in slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1). The PDCCH indicates DL assignment to PDSCH offset K0 and PDSCH to HARQ-ACK report offset K1. For example, DCI format 1_0 or DCI format 1_1 may include the following information.

[0088] - Frequency domain resource assignment: indicates the RB set assigned to PDSCH.

[0089] - 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)

[0090] -PDSCH-to-HARQ_feedback timing indicator: indicates K1

[0091] -HARQ process number (4 bits): indicates the HARQ process identifier (ID) of the data (e.g., PDSCH or TB)

[0092] -PUCCH resource indicator (PRI): indicates the PUCCH resource to be used for UCI transmission among multiple PUCCH resources in a PUCCH resource set

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] Hereinafter, a PUSCH transmission procedure is described.

[0101] 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.

[0102] - Frequency domain resource assignment: indicates the RB set allocated to PUSCH.

[0103] -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.

[0104] 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.

[0105] CSI related operations

[0106] Figure 7 An example of a CSI-related process is shown.

[0107] 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.

[0108] -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.

[0109] - 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).

[0110] - 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.

[0111] -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.

[0112] -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.

[0113] 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).

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] - 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.

[0119] - 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.

[0120] - 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.

[0121] 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.

[0122] Semi-persistent CSI reporting performed in PUCCH format 3 or 4 supports Type IICSI feedback, but only supports part 1 of Type IICSI feedback.

[0123] QCL (quasi-isotope)

[0124] 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.

[0125] 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.

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

[0127] - "QCL-TypeB": {Doppler shift, Doppler spread}

[0128] - "QCL-TypeC": {Doppler shift, average delay}

[0129] - "QCL-TypeD": {spatial Rx parameters}

[0130] Beam Management (BM)

[0131] 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.

[0132] -Beam measurement: The BS or UE measures the characteristics of the received beamformed signal.

[0133] -Beam determination: The BS or UE selects its transmit (Tx) beam / receive (Rx) beam.

[0134] - Beam sweeping: Covering the spatial domain using a Tx beam and / or an Rx beam in a predetermined manner during a predetermined time interval.

[0135] -Beam reporting: The UE reports information about the beamformed signal based on beam measurements.

[0136] 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.

[0137] 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.

[0138] 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).

[0139] Full-duplex operation for NR

[0140] Figure 8 is a diagram for explaining a method of performing a full-duplex operation in an NR system.

[0141] 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.

[0142] 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).

[0143] 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.

[0144] 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.

[0145] 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.

[0146] 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).

[0147] 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.

[0148] FDR's Background

[0149] 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.

[0150] When operating this FDR, the gNB can consider dividing the continuous interval 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 for this 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 base station. 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, for ease of description, from the perspective of a gNB operating in SBFD (or SFFD), a time interval in which DL transmission and UL reception exist simultaneously at the same / different frequencies is defined and described as an SBFD slot, SFFD slot, or full-duplex slot (or FD slot), and a slot in which SBFD operation is not performed is defined and described as a half-duplex slot (or HD slot). SFFD may also be defined as SSFD (Spectrum Sharing Full Duplex). Hereinafter, a method of transmitting and receiving DL and UL through the same frequency resources in overlapping slots / symbols is defined and described as SSFD.

[0154] FDRA (Frequency Domain Resource Allocation)

[0155] For frequency domain resource allocation (FDRA) of DL and / or UL, the following three methods may be considered (refer to 3GPP TS38.214).

[0156] 1. Resource allocation type 0 (bitmap-based allocation)

[0157] 2. Resource allocation type 1 (RIV-based allocation)

[0158] 3. Resource allocation type 2 (interleaved use)

[0159] Specifically, the frequency resource allocation for DL ​​may be defined as shown in Table 5, Table 6 and Table 7 below.

[0160] In addition, frequency resource allocation for UL can be defined as shown in Table 8, Table 9 and Table 10 below.

[0161] [Table 5]

[0162]

[0163] Table 6 defines DL frequency resource allocation type 0.

[0164] [Table 6]

[0165]

[0166] Table 7 defines DL frequency resource allocation type 1.

[0167] [Table 7]

[0168]

[0169]

[0170] In addition, the frequency resource allocation of UL can be defined as shown in Table 8 and Table 9 below.

[0171] [Table 8]

[0172]

[0173] [Table 9]

[0174]

[0175]

[0176] [Table 10]

[0177]

[0178]

[0179] Frequency domain resource mapping for non-contiguous BWP configuration

[0180] A detailed description is given below regarding the case where the UE performs transmission in the full-duplex radio (FDR) scenario of the above-mentioned gNB (i.e., the gNB performs transmission and reception in the same time slot).

[0181] The FDR operation of the gNB performs transmission and reception simultaneously, and may include a case where the transmission frequency and the reception frequency are the same (i.e., SFFD) and a case where the transmission frequency and the reception frequency are different but adjacent (i.e., SBFD). When the gNB performs FDR operation, both downlink (DL) and uplink (UL) frequency resources for FDR operation may be allocated within a carrier (or BWP) for the same time resources. In this case, the UL resources may be located at the center of the carrier to suppress adjacent channel interference (ACI). In this case, for resource allocation efficiency from the perspective of the gNB, non-contiguous or more flexible frequency resources may be allocated to the UE. Therefore, a BWP configuration method that allows non-contiguous or more flexible frequency resources to be allocated to the UE in the FDR scenario of the gNB, etc., may be considered. Therefore, the method of allocating non-contiguous or more flexible frequency resources to the UE is described in detail below, assuming that the UL subband or UL frequency resources are located at the center of the carrier.

[0182] For frequency domain resource allocation (FDRA) of DL and UL, as defined in Tables 5 to 10, the following three methods may be considered.

[0183] 1. Resource allocation type 0 (bitmap-based allocation)

[0184] 2. Resource allocation type 1 (RIV-based allocation)

[0185] 3. Resource allocation type 2 (interleaved use)

[0186] In the above method, methods 1 and 2 (downlink resource allocation type 0 and downlink resource allocation type 1: see 3GPPTS 38.214 subclause 5.1.2.2) can be used for FDRA of PDSCH. For FDRA of PUSCH, methods 1, 2 and 3 (uplink resource allocation type 0, uplink resource allocation type 1 and uplink resource allocation type 2: see 3GPP TS 38.214 subclause 6.1.2.2) can all be used. In the following description, it is assumed that when the UE receives a scheduling grant related to the reception of a DL signal through a DCI of DCI format 1_0, the DCI uses downlink resource allocation type 1 to allocate frequency resources. For UL, when transform precoding is disabled, resource allocation type 0 can be applied only to PUSCH, while resource allocation type 1 and resource allocation type 2 can be applied to two PUSCHs where transform precoding is enabled / disabled.

[0187] Fig.11 is a diagram illustrating an enhanced BWP configured for FDR operation of a base station.

[0188] refer to Fig.11(a), in the case of BWP for FDR (1), the UL subband is located between the DL subbands (or in the central part of the DL subband). Fig.11 (b), in the case of BWP for FDR (2), DL BWP and UL BWP may be arranged not to overlap with each other. In this case, in BWP for FDR (1), DL BWP needs to be configured for non-contiguous PRB resources. Fig.11 The DL / UL subbands shown in may be set for specific time windows during which FDR operation of the gNB is performed.

[0189] In a predetermined scenario (3GPP specification), DL BWP and UL BWP are defined as consisting of consecutive PRBs and having the same center frequency between the DL BWP and UL BWP linked to each other (DL BWP and UL BWP with the same bwp-Id). Fig.11 A new approach to BWP or sub-banding is shown.

[0190] As mentioned above, when the UL BWP (or UL sub-band) is Fig.11 When the DL BWP is located in the center as shown in (a), non-contiguous PRB resources need to be configured. Fig.11 When only one of the upper DL BW (bandwidth) or the lower DL BW is configured in (a), or when Fig.11 When configuring the DL BWP and the UL BWP as shown in (b), as in the above predetermined scenario, the DL BWP / UL BWP may be configured with continuous PRBs. However, this may not satisfy the constraint that the DL BWP and the UL BWP as a BWP pair in the above predetermined scenario should have the same center frequency. In the predetermined scenario, the exclusion / change of the constraint that the same center frequency should be configured between the DL BWP and the UL BWP in the BWP pair may require significant configuration changes in the scenario. Therefore, changing the portion where the DL BWP and the UL BWP are configured with continuous PRBs can minimize the changes in the above scenario.

[0191] Fig.12 A method of allocating frequency resources to a UL BWP and a DL BWP that are adjacent to each other is illustrated.

[0192] Regarding the allocation of non-contiguous frequency resources, if some frequency resources within the DL BWP are not available for DL ​​(or some frequency resources within the ULBWP are not available for UL), the resource block group (RBG) grid of DL may not be aligned with the RBG grid (or frequency resources) available for DL ​​within the DL BWP.

[0193] For example, refer to Fig.12, as a frequency domain resource allocation method based on a conventional bitmap, a start offset of an RBG set to 4 PRBs and a start offset of an RBG set to 5 PRBs may be indicated. Here, in both cases, the RBG size may be 4 (P=4), and the BWP size may be 16. In this case, if common resource blocks (CRBs) 10 to 13 are not used as DLBWPs or DL ​​CRBs (for example, if they are set to UL BWPs or UL subbands), a portion of RBG 01 and a portion of RBG 02 ​​within the DL BWP may not be available for receiving / transmitting DL signals.

[0194] In view of these problems, when the RBG grid and the DL subband boundary are not aligned, it can be considered to configure only RBs available for DL ​​for each RBG. Alternatively, if the RBG grid and the UL subband boundary are not aligned, it can be considered to configure only RBs available for UL for each RBG.

[0195] Alternatively, the subband (or DL / UL BWP) may be configured such that there is no misalignment between the RBG grid and the subband boundary. For example, the gNB may set the position of the subband and / or guard subband considering the RBG grid for the UE.

[0196] Since conventional frequency resource allocation is performed on an RBG basis as described above, a method of configuring at least one subband (or DL / UL BWP) including non-contiguous frequency resources will be described in detail below in consideration of RBG-based frequency resource allocation.

[0197] Here, the DL subband (or DL ​​BWP) may be a subband indicated by the gNB to the UE. For the DL subband, it may be expected that no frequency resources for UL transmission will be allocated. The DL subband may be indicated to the UE using a cell-specific parameter or a UE group-specific parameter through RRC / MAC-CE / DCI, etc. For example, the gNB may indicate the DL subband to the UE through a system information block (SIB), etc. Alternatively, in order to ensure the scheduling freedom of the gNB, the gNB may indicate a UE-specific DL subband to the UE using a UE-specific parameter (through RRC / MAC-CE / DCI). For the DL subband indicated in this manner, the UE may expect / determine that no frequency resources for UL transmission will be allocated. For example, when the configured active UL BWP includes some frequency resources overlapping with the DL subband in units of RB or RE, the UE may consider / determine to exclude the overlapping frequency resources from the active UL BWP.

[0198] Similarly, a UL subband (or UL BWP) may be a subband indicated by the gNB to the UE where no frequency resources are expected to be allocated for DL ​​reception. The UL subband may be indicated to the UE via RRC / MAC-CE / DCI, etc., using cell-specific parameters or UE group-specific parameters. For example, the gNB may indicate the UL subband to the UE via a system information block (SIB), etc. Alternatively, in order to ensure the scheduling freedom of the gNB, the gNB may indicate a UE-specific UL subband to the UE using UE-specific parameters (via RRC / MAC-CE / DCI). For a UL subband indicated in this manner, the UE may expect / determine that frequency resources will not be allocated for reception of DL signals. For example, when the configured active DL BWP includes some frequency resources that overlap with the UL subband in units of RBs or REs, the UE may exclude the overlapping frequency resources from the active DL BWP.

[0199] Further, frequency resources may be allocated for DL ​​or UL in units of RBG or in units of multiple RBs. Here, the unit of frequency resource allocation may be a (minimum) unit assuming the same precoding, or a unit indicating that the same precoding is performed. The RBG size (rbg-Size) may be a BWP-specific value in the configuration of an existing UE. According to a predetermined scenario (TS38.331), rbg-Size belongs to three information elements (IEs) ConfiguredGrantConfig, PDSCH-Config, and PUSCH-Config, which may depend on BWP-UplinkDedicated, BWP-DownlinkDedicated, and BWP-UplinkCommon, respectively.

[0200] As described above, the UE may determine that for the indicated / configured UL subband, no frequency resources overlapping with the UL subband are allocated in the current active DL BWP. Therefore, in order to minimize / prevent resource waste in subsequent resource allocation, it is necessary to match the unit of frequency resource allocation with the (configured) unit of the UL subband. Similarly, the UE may determine that for the indicated / configured DL subband, no frequency resources overlapping with the DL subband are allocated in the current active UL BWP. Therefore, in order to minimize / prevent resource waste in subsequent resource allocation, it is necessary to match the unit of frequency resource allocation with the (configured) unit of the DL subband. Several methods can be considered to match the unit of frequency resource allocation with the (configured) unit of the subband.

[0201] Hereinafter, a detailed description will be given of a method for matching units of frequency resource allocation and (configuration) units of subbands under the assumption of indicating an offset and length (or size or width of bandwidth) of a BWP relative to a specific frequency resource, similar to the existing BWP configuration method.

[0202] Configure the subband so that the unit of frequency resource allocation matches the unit of the subband

[0203] Considering that the RBG grid is determined based on the position of CRB#0, the DL subband and / or UL subband can also be determined / configured based on the position of CRB#0. Alternatively, even if the RBG grid is not considered, the UL subband and / or UL subband (or multiple subbands) can be configured based on CRB instead of PRB, because the subband position is not BWP specific. In this case, the bandwidth size and offset of the subband used to configure the subband can be a multiple of the RBG size set for the UE. For example, the offset / size of the subband can be indicated only as a multiple of the minimum granularity N. In this regard, at least one of the following options can be considered.

[0204] Furthermore, the offset / size of the sub-band may also be defined as the position / bandwidth of the sub-band.

[0205] 1.Alt.1

[0206] In Alt.1, the UE can expect the network / base station / gNB (hereinafter referred to as BS) to always set the offset / size of the subband so as not to be misaligned with the RBG grid.

[0207] In other words, the BS can indicate the offset / size of the subband to the UE without the constraint of the minimum granularity N, and the UE can expect that the subband configured according to the offset / size of the subband will always be aligned with the grid of RBGs for the BWP configured for it. Alternatively, the BS can adjust the minimum granularity N in consideration of the RBG grid of the BWP for the UE. However, in this case, considering the RGB size for each UE, the BS may need to indicate the offset / size of the subband for each UE (because different RBG sizes can be set for the BWP of different UEs).

[0208] 2.Alt.2

[0209] Assuming that the size of the BWP is the system bandwidth (system BW), the UE can determine the minimum granularity N of the offset / size of the subband based on the RBG size of the BWP. For example, the UE can determine that the minimum granularity N is equal to the RBG size or a multiple of the RBG size. The system bandwidth can be set for the UE through initial access to the BS (and / or SIB).

[0210] This method may be appropriate when the subband is configured using a cell-specific parameter or a UE group-specific parameter. In addition, the UE may assume that the system bandwidth is the BWP size. That is, the frequency position (i.e., subband) at which the BS performs an FDR operation (e.g., SBFD, SFFD) may be set based on the system bandwidth, which is a cell-specific parameter or a UE group-specific parameter. In this case, the offset / size for setting the subband may be indicated based on the RBG size or a multiple of the RBG size derived from the parameter configured according to the system bandwidth. For example, when the system bandwidth is configured for the UE, similar to the configuration of the BWP, the UE may determine the RBG size set in the RRC parameter (e.g., ConfiguredGrantConfig, PDSCH-Config, PUSCH-Config, etc.), which depends on the configuration variable of the system band as the derived RBG size. For example, the UE may determine the RBG size derived by the RRC parameter that determines the RBG size according to the size of the system band as the minimum granularity N of the offset / size. Alternatively, the offset / size for setting the subband may be indicated based on the RBG size or a multiple of the RBG size, where the RBG size is the minimum frequency unit assuming the same precoding within the system bandwidth configured for the UE. In other words, the UE may determine the first RBG size or the second RBG size (or a multiple of the first RBG size or a multiple of the second RBG size) derived from the RRC parameter as the minimum granularity N for setting the offset / size of the subband, where the second RBG size is the minimum frequency unit assuming the same precoding within the system bandwidth configured for the UE.

[0211] Here, the value of the minimum granularity N for determining the offset / size of the subband to be equal to a specific RBG size or a multiple of a specific RBG size can be expressed as follows. When indicating the value of the minimum granularity N of the offset / size of the subband, the UE can expect that the minimum granularity N unit will be indicated to be equal to the above-mentioned RBG size (e.g., the first RBG size or the second RBG size) or a specific multiple of the above-mentioned RBG size.

[0212] For example, the RBG size based on the system bandwidth (e.g., the first RBG size or the second RBG size) may be indicated as 2, the offset of the subband may be indicated as 3, and the size (e.g., the bandwidth size) may be indicated as 4. In this case, the UE may determine the starting (frequency) position of the subband based on 6 (which is the product of the RBG size and the offset), and determine 8 (which is the product of the RBG size and the size) as the size or bandwidth of the subband. In other words, the UE may determine that the subband consists of 8 PRBs (CRB#6 to CRB#13) starting from CRB#6, which is a CRB after 6 PRBs (including CRB#5) based on CRB#0.

[0213] Alternatively, the BS may indicate to the UE multiplier information related to the multiple of the RBG size related to the minimum granularity N of the subband offset / size. For example, the multiplier information may be indicated together with the subband offset / size. For example, a specific parameter (e.g., granularity_subband) for the minimum granularity N of the subband offset / size or the multiplier information to be applied to the minimum granularity N may be set / defined. The specific parameter may have a specific value (e.g., 1) as a default value and may include a settable value (multiplier). In this case, the UE may determine the multiplier to be applied to the RBG size based on the system bandwidth based on the specific value set in the specific parameter, and may determine the product of the determined multiplier and the RBG size as the minimum granularity N. If the specific value is not set in the specific parameter, the UE may apply 1 as a default multiplier to the RBG size (which is based on the system bandwidth). The specific parameter may be indicated for each of the DL subband and the UL subband, or the specific parameter may be commonly applicable to the DL subband and the UL subband.

[0214] 3.Alt.3

[0215] The UE may always determine the value of the minimum granularity N of the size / offset of a subband to be equal to the RBG size of the specific BWP set or a multiple thereof.

[0216] According to the situation Alt.3, the minimum granularity N is determined to be applicable when the subband is set specifically by the UE. For example, the frequency position (i.e., subband) at which the BS performs FD operation (e.g., SBFD, SFFD) can be set based on UE-specific parameters (such as, in the form of BWP) or configuration information that adds specific parameters to the existing BWP configuration, or can be set by reusing the existing BWP configuration method. In this case, the minimum granularity N can be set to be equal to the size of the RBG derived from the specific BWP in the predetermined RRC parameters (e.g., the size of the RBG derived based on the specific BWP in ConfiguredGrantConfig, PDSCH-Config, PUSCH-Config, etc.) or to the size of the RBG of the minimum frequency unit that can assume the same precoding within the specific BWP set for the UE, or a multiple of the size of the above RBG.

[0217] In the case where multiple BWPs are configured for the UE, a specific BWP may be determined as one of the BWPs by predetermination or preagreement. As a method for determining a specific BWP, the following options may be considered. However, a specific BWP may be determined among multiple BWPs by a method different from the options described below.

[0218] -Option 1) The UE's DL and / or UL BWP has the largest width;

[0219] - Option 2) The BWP with the lowest index among the UE's DL or UL BWPs;

[0220] - Option 3) Active BWP in the time resources where the BS is expected to perform SBFD operations;

[0221] - Option 4) Default / initial BWP set for the UE;

[0222] - Option 5) The BWP corresponding to a specific BWP ID number.

[0223] The specific BWP determined based on at least one of the options may be changed by RRC / MAC-CE / DCI indication from the BS or by predetermination or preagreement.

[0224] As described above, the value of the minimum granularity N for the size / offset of the subband may be equal to the RBG size of a specific BWP or a multiple of the RBG size of a specific BWP. The UE may expect that the RBG size of a specific BWP or a multiple of the RBG size of a specific BWP will be indicated as the value of the minimum granularity N. In this case, the UE may determine the starting (frequency) position of the subband based on the product of the RBG size and the offset (which is 6), and determine the product of the RBG size and the size (which is 8) as the size or bandwidth of the subband. That is, the UE may determine that the subband consists of 8 PRBs (CRB#6 to CRB#13) starting from CRB#6, and CRB#6 is a CRB after 6 PRBs (including CRB#5) based on CRB#0.

[0225] Alternatively, the BS may indicate to the UE multiple information related to multiples of the RBG size related to the minimum granularity N of the subband offset / size. For example, the multiple information may be indicated together with the subband offset / size. For example, a specific parameter (e.g., granularity_subband) of the minimum granularity N of the subband offset / size or the multiple information to be applied to the minimum granularity N may be set. The specific parameter may have a specific value (e.g., 1) as a default value and may include a configurable value (multiple). In this case, the UE may determine the multiple to be applied to the RBG size based on the system bandwidth based on the specific value set in the specific parameter, and may determine the product of the determined multiple and the RBG size as the minimum granularity N. In this case, if the specific BWP indicating the RBG size changes, the UE may set / reset the subband by applying the RBG size of the changed specific BWP to the offset / size of the same subband indicated.

[0226] The above subband configuration method can be applied to both DL subband configuration and UL subband configuration. In this case, a guard subband can be included between the DL subband and the UL subband. In this case, the guard subband can be considered to configure the DL subband and the UL subband. Alternatively, the configuration information related to the guard subband can be provided with the configuration information related to the DL subband and the UL subband based on the method listed in the above optional scheme.

[0227] Fig.13 A method for configuring at least one subband by a UE is illustrated.

[0228] Reference Fig.13 , the UE may receive first configuration information for configuring the BWP from the BS (S131). The first configuration information may include information for configuring the DL BWP for the downlink and / or information for configuring the UL BWP for the uplink. For example, the first configuration information may include information related to the offset and bandwidth size for configuring the DL BWP and / or UL BWP, and the UE may configure the DL BWP and / or UL BWP based on the offset and bandwidth included in the first configuration information. For example, the UE may configure a DL BWP and / or UL BWP consisting of consecutive PRBs with a bandwidth size starting from the CRB after the offset based on CRB#0.

[0229] Next, the UE may receive second configuration information for configuring at least one subband within the BWP from the BS (S133). Similar to the first configuration information, the second configuration information may include information related to the offset and bandwidth size for configuring the at least one subband. The second configuration information may be sent via RRC signaling or PDCCH (or DCI).

[0230] Next, the UE may configure at least one subband within the BWP based on the offset and the bandwidth size (S135). As described above, the UE may configure at least one subband by applying a specific granularity (or a minimum granularity N) to the offset and the bandwidth size. For example, the UE may configure at least one subband based on the offset multiplied by the specific granularity and the bandwidth size multiplied by the specific granularity. Here, the specific granularity may be set / determined to a value such that the boundary of the at least one subband may be aligned / matched with the RBG grid configured in the BWP, as described with reference to FIG. Figures 9 to 12 For example, the specific granularity may be determined / set to be an RBG size determined based on the system bandwidth or a multiple of the RBG size.

[0231] Specifically, the UE may determine a specific granularity based on the system bandwidth configured by the BS (see Alt. 2). For example, the UE may determine the specific granularity using the RGB size determined according to the size of the system bandwidth in the RRC parameters (ConfiguredGrantConfig, PDSCH-Config, PUSCH-Config). For example, the RBG size (hereinafter referred to as the first RBG size) may be determined / set according to the system bandwidth in the RRC parameters, and the UE may determine the specific granularity based on the first RBG size. For example, the UE may determine the first RBG size or a specific multiple of the first RBG size as a specific granularity, and may apply the determined specific granularity to the offset and bandwidth size to configure at least one subband. For example, when the first RBG size determined according to the size of the system bandwidth in the RRC parameters of PDSCH-Config is 2, the UE may determine 2 as the first RBG size as the size of the specific granularity. In this case, when the offset indicated in the second configuration information is 2 and the bandwidth size is 4, the UE may determine 4 obtained by multiplying the offset 2 by the specific granularity 2 as the offset for determining the starting point of at least one subband, and may determine 8 obtained by multiplying the bandwidth size 4 by the specific granularity 2 as the bandwidth size of at least one subband. In this case, the UE may configure at least one subband including 8 consecutive PRBs starting from a PRB after 4 PRBs (ie, CRB #4) based on CRB #0 (CRB with index 0).

[0232] Alternatively, the UE may determine the minimum unit of the RBG size to which the same precoding is applicable in the system bandwidth (hereinafter referred to as the second RBG size). The UE may determine the second RBG size or a specific multiple of the second RBG size as a specific granularity. For example, when the same precoding is applicable to an RBG consisting of at least 3 RBs in the system bandwidth, the UE may determine the second RBG size equal to 3 as the size of the specific granularity. In this case, when the offset indicated by the second configuration information is 2 and the bandwidth size is 4, the UE may determine 6 obtained by multiplying the offset 2 by the specific granularity 3 as the offset for determining the starting point of at least one subband, and determine 12 obtained by multiplying the bandwidth size 4 by the specific granularity 3 as the bandwidth size of at least one subband. In this case, the UE may configure at least one subband including 12 consecutive PRBs starting from the PRB after 6 PRBs (i.e., CRB#6) based on CRB#0 (CRB with index 0).

[0233] Alternatively, as described above, the UE may be configured with / receive multiplier information (e.g., granularity_subband) related to a specific granularity through the second configuration information. In this case, based on the integer M included in the multiplier information, the UE may determine the specific granularity as a multiple of M of the first RBG size, or as a multiple of M of the second RBG size. If the second configuration information does not include the multiplier information, the UE may determine the specific granularity based on a default value (e.g., 1). For example, if the second configuration information does not include the multiplier information, the UE may determine the specific granularity as the first RBG size or the second RBG size.

[0234] In this way, since the specific granularity is determined based on the first RBG size and the second RBG size, the UE can also apply the offset and bandwidth size to the specific granularity to configure at least one subband, wherein the grid of RBGs and the boundaries configured for the BWP match / align with each other.

[0235] Alternatively, at least one subband may be configured only for a specific time interval. As described above, the specific time interval may correspond to a time interval in which the BS performs an FDR operation. The UE may receive an indication of information related to the specific time from the BS through an RRC / DCI / MAC CE. In this case, the UE may configure at least one subband within the BWP for a specific time interval based on the second configuration information. For example, when the specific time interval is a TDD time interval for receiving a downlink signal, the UE may configure at least one subband within the DL BWP based on the second configuration information. Here, at least one subband may be a UL subband for transmission of an uplink signal. In this case, the UE may determine that the remaining portion of the DL BWP other than the UL subband is designated as a DL subband. Alternatively, at least one subband may be a DL subband and a UL subband within the DL BWP. As described above, unlike the BS, even if the DL subband and the UL subband are configured for a specific time interval, the UE may perform a DL reception operation only in the DL subband or a UL reception operation in the UL subband. In other words, even if the FDR operation of the BS may be performed in a specific time interval, the UE may perform only half-duplex operation.

[0236] Alternatively, the UE may specify the RBG size for determining the specific granularity according to the type of the signal carrying the second configuration information. For example, when the second configuration information is indicated in the cell-specific parameters or the UE group-specific parameters, the UE may determine the RBG size using the system bandwidth based on Alt.2. Alternatively, when the second configuration information is indicated in the UE-specific parameters, the UE may determine the RBG size for determining the specific granularity by considering the size of the specific BWP configured for the UE based on Alt.3.

[0237] Fig.14 A method for configuring at least one subband for a UE by a BS is illustrated.

[0238] Reference Fig.14 , the BS may send first configuration information (S141) to the UE to configure a bandwidth part (BWP). Next, the BS may send second configuration information (S143) to the UE regarding an offset and a bandwidth size for configuring at least one subband within the BWP. In this case, the BS may anticipate configuring at least one subband for the UE by applying a specific granularity to the offset and bandwidth size included in the second configuration information (without directly applying the offset and bandwidth size itself). For example, the BS may anticipate / determine that the starting position of at least one subband will be determined based on an offset multiplied by a specific granularity, and that the bandwidth size of at least one subband will be determined based on the bandwidth size multiplied by the specific granularity. The specific granularity may be set / determined to a value such that a grid of RBGs configured in the BWP and a boundary of at least one subband may be aligned / matched, as described with reference to Figures 9 to 13 For example, the specific granularity may be determined / set to be an RBG size determined based on the system bandwidth or a multiple of the RBG size.

[0239] Since at least one subband is configured according to the RBG size determined based on the system bandwidth and further considering the specific granularity, the boundary of at least one subband and the RBG grid configured for the BWP can be easily aligned with each other. Alternatively, the frequency resource allocation in units of RBG for the BWP and / or at least one subband can minimize / prevent the generation of unused frequency resources. Alternatively, the matching of the unit of frequency resource allocation according to the specific granularity with the (configuration) unit of the subband can minimize / prevent resource waste in subsequent resource allocation. In addition, since the specific granularity is directly determined by the UE based on the system bandwidth, the BS can send configuration information for configuring at least one subband without considering the RBG size set for each UE. In this case, the BS can align the RBG grid for the BWP with at least one subband without having to determine different offsets and bandwidth sizes for each UE with different RBG sizes.

[0240] Communication system example to which the present disclosure is applied

[0241] 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.

[0242] 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.

[0243] Fig.15 A communication system applied to the present disclosure is illustrated.

[0244] Reference Fig.15 , the communication system 1 applied to the present disclosure includes a wireless device, a base station (BS), and a network. Herein, a 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.

[0245] 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.

[0246] 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.

[0247] Examples of wireless devices to which the present disclosure is applied

[0248] Fig.16 A wireless device suitable for use with the present disclosure is illustrated.

[0249] Reference Fig.16 , 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.15 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0250] 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.

[0251] According to one embodiment, the first wireless device 100 or UE may include a processor 102 connected to an RF transceiver and a memory 104. The memory 104 may include a processor capable of executing and referring to Figures 9 to 14 At least one procedure of operations related to the described embodiments.

[0252] Specifically, the processor 102 may control the RF transceiver 106 to receive first configuration information for configuring a bandwidth part (BWP) from the BS, receive second configuration information from the BS from the BS, the second configuration information including information about an offset and a bandwidth size for configuring at least one subband within the BWP, and configure at least one subband based on the second configuration information. The at least one subband may be configured based on the offset, the bandwidth size, and a specific granularity determined according to the size of the system bandwidth.

[0253] Alternatively, the processor 102 and the memory 104 may be a processing device that controls a UE communicating with a BS. In this case, the processing device may include at least one processor, and at least one memory connected to the at least one processor and storing instructions. These instructions, when executed by at least one processor, may cause the UE to: receive first configuration information for configuring a bandwidth part (BWP) from the BS; receive second configuration information from the BS from the BS, the second configuration information including information about an offset and a bandwidth size for configuring at least one subband within the BWP; and configure at least one subband based on the second configuration information. At least one subband may be configured based on an offset, a bandwidth size, and a specific granularity determined according to the size of the system bandwidth.

[0254] Alternatively, the non-transitory computer-readable storage medium may be configured to record thereon the instructions for executing the reference Figures 9 to 14 Instructions describing the proposed method.

[0255] 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.

[0256] According to one embodiment, the base station 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 first configuration information for configuring a bandwidth part (BWP) to the UE, and send second configuration information to the UE, the second configuration information including information about an offset and a bandwidth size for configuring at least one subband within the BWP. At least one subband may be configured based on the offset, the bandwidth size, and a specific granularity determined according to the size of the system bandwidth.

[0257] 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.

[0258] 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.

[0259] 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.

[0260] 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.

[0261] Application examples of wireless devices to which the present disclosure is applied

[0262] Fig.17 Another example of a wireless device to which the present disclosure is applied is shown.

[0263] Reference Fig.17 , the wireless devices 100 and 200 may correspond to Fig.16The 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.16 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Fig.16 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.

[0264] 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.15 100a), vehicles ( Fig.15 100b-1 and 100b-2), XR devices ( Fig.15 100c), handheld device ( Fig.15 100d), household appliances ( Fig.15 100e), IoT devices ( Fig.15 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.15 400), BS( Fig.15 200), network nodes, etc. The wireless device can be used in a mobile or fixed location according to the usage example / service.

[0265] exist Fig.17In 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.

[0266] 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.

[0267] 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.

[0268] 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).

[0269] 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.

[0270] 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.

[0271] 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.

[0272] Industrial Applicability

[0273] The above-mentioned embodiments of the present disclosure may be applicable to various mobile communication systems.

Claims

1. A method for communicating between a user equipment UE and a base station in a wireless communication system, the method comprising the following steps: receiving first configuration information for configuring a bandwidth part BWP from the base station; receiving second configuration information from the base station, the second configuration information comprising information about an offset and a bandwidth size for configuring at least one subband; as well as configuring the at least one subband within the BWP based on the second configuration information; The at least one subband is configured based on the offset, the bandwidth size and a specific granularity determined according to the size of the system bandwidth.

2. The method according to claim 1, wherein: The boundary of the at least one subband is aligned with a grid of resource block groups (RBGs) configured for the BWP based on the offset, the bandwidth size, and the specific granularity.

3. The method according to claim 1, wherein: The specific granularity is determined as a resource block group (RBG) size or a multiple of the RBG size, and the RBG size is determined based on the size of the system bandwidth.

4. The method according to claim 1, wherein: The specific granularity is determined as a minimum resource block group (RBG) size that allows application of the same precoding within the system bandwidth or a multiple of the minimum RBG size.

5. The method according to claim 3, wherein: The second configuration information further includes indication information indicating M associated with the specific granularity, where M is an integer. The specific granularity is determined as a value obtained by multiplying M by the RBG size determined based on the size of the system bandwidth.

6. The method according to claim 1, wherein: The starting position of the at least one subband is determined based on a value obtained by multiplying the offset by the specific granularity, The size of the at least one subband is determined based on a value obtained by multiplying the bandwidth size by the specific granularity.

7. The method according to claim 1, wherein: The at least one subband is configured only for a specific time interval of a full-duplex operation of the base station.

8. The method according to claim 7, wherein: The at least one subband includes at least one of a first subband for a downlink or a second subband for an uplink.

9. The method according to claim 1, wherein: The UE determines that the BWP is configured with only remaining frequency resources excluding at least one frequency resource overlapping with the at least one subband among a plurality of frequency resources configured for the BWP for a specific time interval.

10. The method according to claim 1, wherein: The second configuration information is a radio resource control RRC parameter for a cell-specific group or a UE-specific group. 11 . A non-transitory computer-readable storage medium having recorded thereon instructions for executing the method according to claim 1 .

12. A user equipment UE for communicating with a base station in a wireless communication system, the UE comprising: Radio frequency RF transceiver; as well as connected to the RF transceiver processor, The processor controls the RF transceiver to perform an operation, wherein the operation includes: receiving first configuration information for configuring a bandwidth part BWP from the base station; receiving second configuration information from the base station, the second configuration information comprising information about an offset and a bandwidth size for configuring at least one subband within the BWP; and configuring the at least one subband according to the second configuration information, The at least one subband is configured based on the offset, the bandwidth size and a specific granularity determined according to the size of the system bandwidth.

13. A processing device for controlling a user equipment UE in a wireless communication system, the processing device comprising: at least one processor; as well as at least one memory, the at least one memory being connected to the at least one processor and storing instructions, where the instructions, when executed by the at least one processor, cause the UE to perform the following operations: receiving first configuration information for configuring a bandwidth part BWP from a base station; receiving second configuration information from the base station, the second configuration information comprising information about an offset and a bandwidth size for configuring at least one subband within the BWP; as well as configuring the at least one subband based on the second configuration information; The at least one subband is configured based on the offset, the bandwidth size and a specific granularity determined according to the size of the system bandwidth.

14. A method for communicating between a base station and a user equipment UE in a wireless communication system, the method comprising: Sending first configuration information for configuring a bandwidth part BWP to the UE; as well as sending second configuration information to the UE, the second configuration information comprising information about an offset and a bandwidth size for configuring at least one subband within the BWP, The at least one subband is configured based on the offset, the bandwidth size and a specific granularity determined according to the size of the system bandwidth.

15. A base station for communicating with a UE in a wireless communication system, the base station comprising: Radio frequency RF transceiver; as well as connected to the RF transceiver processor, The processor controls the RF transceiver to perform an operation, wherein the operation includes: Sending first configuration information for configuring a bandwidth part BWP to the UE; and sending second configuration information to the UE, the second configuration information comprising information about an offset and a bandwidth size for configuring at least one subband within the BWP, The at least one subband is configured based on the offset, the bandwidth size and a specific granularity determined according to the size of the system bandwidth.

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