Method in which terminal performs measurement in wireless communication system and apparatus therefor

Abstract

According to various embodiments, a method by which a terminal performs cross-link interference (CLI) measurement in a wireless communication system and an apparatus therefor are disclosed. Disclosed are a method and an apparatus therefor, the method comprising the steps of: receiving information on CLI measurement resources for CLI measurement; and transmitting, to the base station, measurement information including a CLI measured on the basis of the CLI measurement resource, in which, on the basis of timing advance (TA) information of the received candidate cell, the measurement information further includes information on a cell ID determined on the basis of the TA information and a measurement timing at which the CLI is measured.

Description

Technical Field

[0001] A method and apparatus for a user equipment (UE) to perform measurement in a wireless communication system are provided. Background Art

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

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

[0004] Technical issues

[0005] The present disclosure provides a method and apparatus for clearly distinguishing and reporting whether a measurement result of a cross-link interference (CLI) is due to an inter-cell CLI environment or an intra-cell CLI environment by additionally reporting, by a user equipment (UE) capable of obtaining timing advance (TA) information about a neighbor cell, a measurement timing based on a cross-link interference (CLI) and a neighbor cell ID identified by TA information about the neighbor cell.

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

[0007] Technical Solution

[0008] According to one aspect, a method for performing cross-link interference (CLI) measurement by a user equipment (UE) in a wireless communication system includes: receiving information about CLI measurement resources for measuring CLI; and sending measurement information including CLI measured based on the CLI measurement information to a base station (BS), wherein, based on receiving timing advance (TA) information for a candidate cell, the measurement information also includes information about a cell identifier (ID) determined based on measurement timing and TA information for measuring CLI.

[0009] The TA information may include multiple TA values ​​for multiple candidate cells.

[0010] The method may also include: estimating a first TA value related to the measured CLI based on the measurement timing; and determining a second TA value corresponding to the first TA value from the TA values ​​for multiple cells provided in the TA information, wherein the cell ID is the ID of a candidate cell corresponding to the second TA value among the multiple candidate cells.

[0011] Based on measuring a plurality of CLIs in the CLI measurement resource, the first TA value may be a TA value estimated based on measurement timing for a CLI having a highest value among the plurality of CLIs measured in the CLI measurement resource.

[0012] The CLI measurement resource may be a sounding reference signal (SRS) resource for measuring the CLI, and the SRS resource may have at least one preset TCI state information.

[0013] The measurement information may also include TCI status information of the SRS resource configuration for CLI measurement.

[0014] Based on measuring a plurality of CLIs in the CLI measurement resource, the CLI state information provided in the measurement information may be TCI state information configured for the SRS resource for which the CLI having the highest value or the CLI having the lowest value among the plurality of CLIs is measured.

[0015] The method may also include receiving, from the BS, configuration information for a specific TA related to a CLI received signal strength indicator (RSSI) resource provided in the CLI measurement resource.

[0016] The UE may measure the CLI of the CLI-RSSI resource by applying a specific TA value to the CLI-RSSI resource.

[0017] According to another aspect, a user equipment (UE) for performing measurements related to cross-link interference (CLI) in a wireless communication system includes a radio frequency (RF) transceiver and a processor connected to the RF transceiver, wherein the processor controls the RF transceiver to receive timing advance (TA) information for a candidate cell, receive information about CLI measurement resources for measuring CLI, measure CLI based on the CLI measurement resources, determine a cell identifier (ID) related to CLI based on measurement timing and TA information for measuring CLI, and send measurement information including information about the measured CLI and the cell ID to a base station (BS).

[0018] According to another aspect, a method for receiving measurement information related to cross-link interference (CLI) by a base station (BS) in a wireless communication system includes: sending information about CLI measurement resources for measuring CLI to a user equipment (UE); and receiving measurement information including CLI measured based on the CLI measurement information from the UE, wherein the measurement information also includes information about a cell ID determined based on measurement timing for measuring CLI and timing advance (TA) information for a candidate cell.

[0019] Beneficial Effects

[0020] According to various embodiments, a user equipment (UE) capable of acquiring TA information about surrounding cells can accurately determine / estimate information about cells related to the measured cross-link interference (CLI) based on CLI measurement timing through signals of surrounding UEs related to measurement of CLI and TA information about surrounding cells.

[0021] The UE may report CLI measurement information, which additionally includes a cell ID corresponding to the CLI measured according to the above method, thereby clearly distinguishing whether the CLI measurement value is generated by an inter-cell environment or an intra-cell environment, and reporting the measurement information.

[0022] The effects to be achieved by the embodiments are not limited to the contents specifically described above, and those skilled in the art to which the embodiments belong will more clearly understand other effects not mentioned herein according to the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and together with the description serve to explain the principle of the disclosure.

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

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

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

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

[0028] Figure 5 is a diagram illustrating physical channels that can be used in an embodiment and a signal transmission method using the physical channels;

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

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

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

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

[0033] Fig.11 and Fig.12 is a diagram for explaining a method of performing CLI measurement / reporting based on TA information by a UE.

[0034] Fig.13 is a diagram for explaining a method of performing CLI measurement by a UE.

[0035] Fig.14 is a diagram for explaining a method of receiving, by a BS, a report of CLI measurement information from a UE.

[0036] Fig.15 A communication system applied to the present disclosure is illustrated.

[0037] Fig.16 A wireless device suitable for use with the present disclosure is illustrated.

[0038] Fig.17 Another example of a wireless device to which the present disclosure is applied is illustrated. DETAILED DESCRIPTION

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] For clarity of explanation, LTE-A or 5G NR is mainly described, but the technical spirit of the implementation manner is not limited thereto.

[0046] 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.

[0047] Reference Figure 1 , E-UTRAN includes an evolved Node B (eNB) 20 that provides a control plane and a user plane to UE 10. UE 10 may be fixed or mobile, and may also be referred to as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), or a wireless device. eNB 20 is a fixed station that communicates with UE 10, and may also be referred to as a base station (BS), a base transceiver system (BTS), or an access point.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Figure 2 The structure of the NR system is illustrated.

[0052] Reference Figure 2 , the next generation radio access network (NG-RAN) may include next generation Node Bs (gNBs) and / or eNBs that provide user plane and control plane protocol terminations to the UE. Figure 2 In the figure, for example, NG-RAN is shown as including only gNB. gNB and eNB are connected to each other via Xn interface. gNB and eNB are connected to 5G core network (5GC) via NG interface. More specifically, gNB and eNB are connected to access and mobility management function (AMF) via NG-C interface, and to user plane function (UPF) via NG-U interface.

[0053] Figure 3 The structure of an NR radio frame to which the present disclosure is applicable is illustrated.

[0054] 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).

[0055] 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).

[0056] 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 .

[0057] [Table 1]

[0058] <![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

[0059] The following Table 2 lists the number of symbols per time slot, the number of time slots per frame, and the number of time slots per subframe according to SCS in the ECP case.

[0060] [Table 2]

[0061] <![CDATA[SCS(15*2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 60KHz(u=2) 12 40 4

[0062] In the NR system, different OFDM(A) parameter sets (e.g., SCS, CP length, etc.) can be configured for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of time resources (e.g., subframes, time slots, or TTIs) (for convenience, time resources are collectively referred to as time units (TUs)) comprising the same number of symbols can be configured to be different for the aggregated cells. In NR, various parameter sets or SCSs can be supported to support various 5G services. For example, with an SCS of 15kHz, wide areas in traditional cellular bands can be supported, while with an SCS of 30kHz / 60kHz, dense urban areas, lower latency, and wide carrier bandwidths can be supported. When the SCS is 60kHz or higher, bandwidths wider than 24.25GHz can be supported to overcome phase noise.

[0063] The NR frequency band may be defined by two types of frequency ranges FR1 and FR2. The two types of frequency ranges may be FR1 and FR2. The numerical values ​​of the frequency ranges may be changed. For example, the two types of frequency ranges may be configured as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 may mean "a range below 6 GHz", and FR2 may mean "a range above 6 GHz", and may be referred to as millimeter wave (mmW).

[0064] [Table 3]

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

[0066] As mentioned above, the value of the frequency range of the NR system can be changed. For example, FR1 may include a frequency band of 410 MHz to 7125 MHz as shown in Table 24 below. That is, FR1 may include a frequency band of 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.) or higher included in FR1 may include an unlicensed frequency band. The unlicensed frequency band can be used for various purposes, for example, for vehicle communications (e.g., autonomous driving).

[0067] [Table 4]

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

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

[0070] Reference Figure 4 , a time slot includes multiple symbols in the time domain. For example, a time slot may include 14 symbols in the normal CP case and 12 symbols in the extended CP case. Alternatively, a time slot may include 7 symbols in the normal CP case and 6 symbols in the extended CP case.

[0071] A carrier may include multiple subcarriers in the frequency domain. A resource block (RB) is defined as a plurality of consecutive subcarriers (e.g., 12 subcarriers) in the frequency domain. A bandwidth part (BWP) may be defined as a plurality of consecutive (P) RBs in the frequency domain, and a BWP may correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., 5) BWPs. Data communication may be performed in an activated BWP. In a resource grid, each element may be referred to as a resource element (RE) and may be mapped to a complex symbol.

[0072] The wireless interface between UEs or the wireless interface between UE and the network may include L1 layer, L2 layer and L3 layer. In various embodiments of the present disclosure, L1 layer may represent a physical layer. L2 layer may represent at least one of a MAC layer, an RLC layer, a PDCH layer or an SDAP layer. L3 layer may represent an RRC layer, for example.

[0073] Bandwidth Part (BWP)

[0074] In an NR system, each component carrier (CC) can support up to 400MHz. If a UE operating on a wideband CC always utilizes RF operation for all enabled CCs, the battery power consumption of the UE may increase. Alternatively, considering various use cases (e.g., eMBB, URLLC, mMTC, V2X, etc.) operating within a wideband CC, different parameter sets (e.g., subcarrier spacing) may be supported for different frequency bands within a specific CC. Alternatively, the capabilities for maximum bandwidth may be different between UEs. In view of this, the BS may instruct the UE to operate only in part of the bandwidth, rather than in the entire bandwidth of the wideband CC. For simplicity, a partial bandwidth is defined as a bandwidth part (BWP). Here, a BWP may be composed of resource blocks (RBs) that are continuous on the frequency axis and may correspond to a parameter set (e.g., subcarrier spacing, CP length, slot / mini-slot duration).

[0075] The BS may configure multiple BWPs in one CC configured for the UE. For example, a BWP occupying a relatively small frequency domain may be configured in the PDCCH monitoring time slot, and the PDSCH indicated by the PDCCH in the larger BWP may be scheduled. Alternatively, when the UE is concentrated in a specific BWP, some of the UEs may be configured in another BWP to balance the load. Alternatively, considering the frequency domain inter-cell interference elimination between adjacent cells, the spectrum in the middle of the entire bandwidth may be punctured and the two BWPs on both sides may be configured in the same time slot. That is, the BS may configure at least one DL / UL BWP for the UE associated with the broadband CC (through L1 signaling, MAC CE or RRC signaling, etc.), and activate at least one DL / UL BWP among the configured DL / UL BWPs at a specific time. The BS may instruct the UE to switch to another configured DL / UL BWP (through L1 signaling, MAC CE or RRC signaling, etc.). Alternatively, when the timer expires, the UE may switch to a predetermined DL / UL BWP. The activated DL / UL BWP is defined as the activated DL / UL BWP. During the initial access procedure or before establishing an RRC connection, the UE may not be able to receive the DL / UL BWP configuration. The DL / UL BWP assumed by the UE in this situation is defined as the initially activated DL / UL BWP.

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

[0077] Reference Figure 5 , when the UE is powered on or when the UE initially enters a cell, in step S11, the UE performs an initial cell search involving synchronization with the BS. For the initial cell search, the UE receives a synchronization signal block (SSB). The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE synchronizes with the BS based on the PSS / SSS and acquires information such as a cell identifier (ID). The UE can then receive broadcast information from the cell on the PBCH. At the same time, the UE can check the downlink channel status by receiving a downlink reference signal (DL RS) during the initial cell search.

[0078] After the initial cell search, the UE may acquire more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) based on information of the PDCCH in step S12.

[0079] Subsequently, in order to complete the connection with the eNB, the UE may perform a random access procedure with the eNB (S13 to S16). In the random access procedure, the UE may send a preamble on a physical random access channel (PRACH) (S13) and may receive a random access response (RAR) to the preamble on a PDSCH associated with the PDCCH (S14). The UE may send a physical uplink shared channel (PUSCH) by using the scheduling information in the RAR (S15), and perform a contention resolution procedure, including receiving a PDCCH signal and a PDSCH signal corresponding to the PDCCH signal (S16).

[0080] In addition to the above-mentioned 4-step random access procedure (4-step RACH procedure or type 1 random access procedure), when the random access procedure is performed in two steps (2-step RACH procedure or type 2 random access procedure), steps S13 and S15 can be performed as a UE sending operation (e.g., an operation of sending message A (MsgA) including a PRACH preamble code and / or PUSCH), and steps S14 and S16 can be performed as a BS sending operation (e.g., an operation of sending message B (MsgB) including RAR and / or contention resolution information).

[0081] After the above process, in a general UL / DL signal transmission process, the UE may receive a PDCCH and / or a PDSCH from the BS ( S17 ) and transmit a PUSCH and / or a physical uplink control channel (PUCCH) to the BS ( S18 ).

[0082] The control information sent by the UE to the BS is collectively referred to as uplink control information (UCI). UCI includes hybrid automatic repeat and request acknowledgement / negative confirmation (HARQ-ACK / NACK), scheduling request (SR), channel quality indicator (CQI), precoding matrix index (PMI), rank indicator (RI), etc.

[0083] Typically, UCI is sent periodically on the PUCCH. However, if control information and service data should be sent simultaneously, control information and service data may be sent on the PUSCH. In addition, UCI may be sent aperiodically on the PUSCH when a request / indication is received from the network.

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

[0085] Reference Figure 6 , the UE may detect the PDCCH in slot #n. The PDCCH includes DL scheduling information (e.g., DCI format 1_0 or DCI format 1_1). The PDCCH indicates DL assignment 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.

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

[0087] - Time domain resource assignment: Indicates K0 (e.g., slot offset), the starting position of the PDSCH in slot #n+K0 (e.g., OFDM symbol index), and the length of the PDSCH (e.g., number of OFDM symbols)

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

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

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

[0091] Subsequently, the UE may receive the PDSCH from time slot #(n+K0) according to the scheduling information in time slot #n. Upon completion of PDSCH reception in time slot #n1 (where n+K0≤n1), the UE may send UCI via PUCCH in time slot #(n1+K1). The UCI may include a HARQ-ACK response to the PDSCH. Figure 6 In the example, it is assumed for convenience that the SCS of the PDSCH and the SCS of the PUCCH are the same and slot #n1=slot #n+K0, but the present disclosure is not limited thereto. When the SCSs are different, K1 may be indicated / interpreted based on the SCS of the PUCCH.

[0092] When the PDSCH is configured to send at most one TB, the HARQ-ACK response may include one bit. When the PDSCH is configured to send at most two TBs, the HARQ-ACK response may include two bits if spatial bundling is not configured and one bit if spatial bundling is configured. When the HARQ-ACK transmission time for multiple PDSCHs is specified as time slot #(n+K1), the UCI sent in time slot #(n+K1) includes HARQ-ACK responses for multiple PDSCHs.

[0093] Whether the UE should perform spatial bundling for the HARQ-ACK response may be configured for each cell group (e.g., via RRC / high-layer signaling). For example, spatial bundling may be configured separately for each HARQ-ACK response sent via PUCCH and / or each HARQ-ACK response sent via PUSCH.

[0094] When the maximum number of TBs (or codewords) that can be received at one time (or can be scheduled by one DCI) in the corresponding serving cell is 2 (or greater) (for example, when the high-level parameter maxNrofCodeWordsScheduledByDCI corresponds to 2 TBs), spatial bundling can be supported. In addition, more than four layers can be used for 2TB transmission, and at most four layers can be used for 1TB transmission. As a result, when spatial bundling is configured for the corresponding cell group, spatial bundling can be performed for the serving cells in the cell group that can schedule more than four layers. On the serving cell, a UE that wants to send a HARQ-ACK response through spatial bundling can generate a HARQ-ACK response by performing a bit-by-bit logical AND operation on the A / N bits of multiple TBs.

[0095] For example, assuming that a UE receives a DCI that schedules two TBs and receives the two TBs through a PDSCH based on the DCI, the UE that performs spatial bundling can generate a single A / N bit by performing a logical AND operation on a first A / N bit of a first TB and a second A / N bit of a second TB. As a result, when both the first TB and the second TB are ACK, the UE reports an ACK bit value to the BS, and when either TB is NACK, the UE reports a NACK bit value to the BS.

[0096] For example, when only one TB is actually scheduled in a serving cell configured to receive two TBs, the UE may generate a single A / N bit by performing a logical AND operation on the A / N bits of the one TB and a bit value 1. As a result, the UE reports the A / N bits of the one TB to the BS as is.

[0097] There are multiple parallel DL HARQ processes for DL ​​transmission in the BS / UE. Multiple parallel HARQ processes allow DL transmission to be performed continuously while the BS waits for HARQ feedback on successful or unsuccessful reception of the previous DL transmission. Each HARQ process is associated with a HARQ buffer of the medium access control (MAC) layer. Each DL HARQ process manages state variables such as the number of transmissions of the MAC physical data block (PDU) in the buffer, the HARQ feedback for the MAC PDU in the buffer, and the current redundancy version. Each HARQ process is identified by a HARQ process ID.

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

[0099] The UE may detect the PDCCH in slot #n. The PDCCH may include UL scheduling information (eg, DCI format 0_0 or DCI format 0_1). The DCI format 0_0 or DCI format 0_1 ​​may include the following information.

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

[0101] -Time domain resource assignment: Specify the slot offset K2 indicating the starting position (eg, symbol index) and the length of the PUSCH in the slot (eg, the number of OFDM symbols). The starting symbol and length of the PUSCH may be indicated by a start and length indicator value (SLIV) or separately.

[0102] Then, the UE may transmit the PUSCH in slot #(n+K2) according to the scheduling information in slot #n. The PUSCH includes the UL-SCH TB.

[0103] CSI-related operations

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

[0105] The UE receives CSI-related configuration information from the BS via RRC signaling (710). The CSI-related configuration information may include at least one of channel state information-interference measurement (CSI-IM) related information, CSI measurement related information, CSI resource configuration related information, CSI-RS resource related information, or CSI report configuration related information.

[0106] -CSI-IM resources may be configured for interference measurement (IM) of the UE. In the time domain, the CSI-IM resource set may be configured as periodic, semi-persistent, or aperiodic. The CSI-IM resources may be configured as zero power (ZP)-CSI-RS of the UE. The ZP-CSI-RS may be configured to be distinguished from the non-zero power (NZP)-CSI-RS.

[0107] - The UE may assume that the CSI-RS resources for channel measurement and the CSI-IM / NZP CSI-RS resources for interference measurement configured for one CSI report have a QCL relationship with respect to the "QCL-TypeD" of each resource (when the NZP CSI-RS resources are used for interference measurement).

[0108] - The CSI resource configuration may include at least one of a CSI-IM resource for interference measurement, an NZP CSI-RS resource for interference measurement, and an NZP CSI-RS resource for channel measurement. The channel measurement resource (CMR) may be an NZP CSI-RS for CSI acquisition, and the interference measurement resource (IMR) may be an NZP CSI-RS for CSI-IM and IM.

[0109] -CSI-RS can be configured for one or more UEs. Different CSI-RS configurations can be provided for each UE, or the same CSI-RS configuration can be provided to multiple UEs. CSI-RS can support up to 32 antenna ports. CSI-RS corresponding to N (N is 1 or greater) antenna ports can be mapped to N RE positions within a time-frequency unit corresponding to one time slot and one RB. When N is 2 or greater, N-port CSI-RS can be multiplexed by CDM, FDM and / or TDM methods. CSI-RS can be mapped to the remaining REs except for REs mapped with CORESET, DMRS and SSB. In the frequency domain, CSI-RS can be configured for the entire bandwidth, a partial bandwidth part (BWP) or a partial bandwidth. CSI-RS can be sent in each RB within the bandwidth in which CSI-RS is configured (ie, density = 1), or CSI-RS can be sent in every two RBs (eg, even or odd RBs) (ie, density = 1 / 2). When CSI-RS is used as a tracking reference signal (TRS), a single-port CSI-RS may be mapped on three subcarriers in each resource block (i.e., density = 3). One or more CSI-RS resource sets may be configured for a UE in the time domain. Each CSI-RS resource set may include one or more CSI-RS configurations. Each CSI-RS resource set may be configured as periodic, semi-persistent, or aperiodic.

[0110] -CSI report configuration may include configuration of feedback type, measurement resources, report type, etc. NZP-CSI-RS resource set may be used for CSI report configuration of corresponding UE. NZP-CSI-RS resource set may be associated with CSI-RS or SSB. Multiple periodic NZP-CSI-RS resource sets may be configured as TRS resource sets. (i) Feedback type includes channel quality indicator (CQI), precoding matrix indicator (PMI), CSI-RS resource indicator (CRI), SSB resource block indicator (SSBRI), layer indicator (LI), rank indicator (RI), first layer (L1)-reference signal received strength (RSRP), etc. (ii) Measurement resources may include configuration of downlink signals and / or downlink resources on which UE performs measurements to determine feedback information. Measurement resources may be configured as ZP and / or NZP CSI-RS resource sets associated with CSI report configuration. NZP CSI-RS resource sets may include CSI-RS sets or SSB sets. For example, L1-RSRP may be measured for a CSI-RS set or an SSB set. (iii) The report type may include the time at which the UE performs the report and the configuration of the uplink channel. The reporting time may be configured as periodic, semi-persistent, or aperiodic. Periodic CSI reports may be sent on the PUCCH. Semi-persistent CSI reports may be sent on the PUCCH or PUSCH based on a MAC CE indicating enable / disable. Aperiodic CSI reports may be indicated by DCI signaling. For example, the CSI request field of an uplink grant may indicate one of various report trigger sizes. Aperiodic CSI reports may be sent on the PUSCH.

[0111] The UE measures the CSI based on the configuration information related to the CSI. The CSI measurement may include receiving a CSI-RS (720) and acquiring the CSI by calculating the received CSI-RS (730).

[0112] The UE may send a CSI report to the BS (740). For the CSI report, time resources and frequency resources available to the UE are controlled by the BS. The channel state information (CSI) includes at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), a CSI-RS resource indicator (CRI), a SS / PBCH block resource indicator (SSBRI), a layer indicator (LI), a rank indicator (RI), L1-RSRP, and / or L-SINR.

[0113] The time domain behavior of CSI reporting supports periodic, semi-persistent, and aperiodic. i) Periodic CSI reporting is performed in short PUCCH and long PUCCH. The periodicity and slot offset of periodic CSI reporting can be configured by RRC, and refer to CSI-ReportConfig IE. ii) SP (semi-periodic) CSI reporting is performed in short PUCCH, long PUCCH or PUSCH. For SP CSI in short / long PUCCH, the periodicity and slot offset are configured by RRC, and CSI reporting is enabled / disabled through a separate MAC CE / DCI. For SP CSI in PUSCH, the periodicity of SP CSI reporting is configured by RRC, but the slot offset is not configured by RRC and SP CSI reporting is enabled / disabled by DCI (format 0_1). For SP CSI reporting in PUSCH, a separate RNTI (SP-CSI C-RNTI) is used. The initial CSI report timing follows the PUSCH time domain allocation value indicated by DCI, and subsequent CSI report timing follows the periodicity configured by RRC. DCI format 0_1 ​​may include a CSI request field and enable / disable a specific configured SP-CSI triggering state. SP CSI reporting has the same or similar enable / disable mechanism as with data transmission in SPS PUSCH. iii) Aperiodic CSI reporting is performed in PUSCH and triggered by DCI. In this case, information related to the triggering of aperiodic CSI reporting may be transmitted / indicated / configured via MAC-CE. For AP CSI with AP CSI-RS, the AP CSI-RS timing is configured by RRC and the timing of the AP CSI report is dynamically controlled by DCI.

[0114] The CSI codebooks (e.g., PMI codebooks) defined in the NR standard can be roughly divided into type I codebooks and type II codebooks. Type I codebooks are mainly for single-user (SU)-MIMO, supporting both high and low orders. Type II codebooks can mainly support MI-MIMO with up to 2 layers. Compared with type I, type II codebooks can provide more accurate CSI, but the signaling overhead may increase accordingly. An enhanced type II codebook is introduced to address the CSI overhead disadvantages of the existing type II codebook by reducing the payload of the codebook by considering the correlation of the frequency axis.

[0115] The CSI report via PUSCH may be configured as part 1 and part 2. Part 1 has a fixed payload size and is used to identify the number of bits of information in part 2. Part 1 may be transmitted in its entirety before part 2.

[0116] - For Type I CSI feedback, part 1 includes RI (if reported), CRI (if reported) and CQI for the first codeword. Part 2 includes PMI, and when RI>4, part 2 includes CQI.

[0117] - For type IICSI feedback, part 1 includes the RI (if reported), CQI and an indication of the number of non-zero WB amplitude coefficients per layer of type IICSI. Part 2 includes the PMI of type IICSI.

[0118] - For enhanced type IICSI feedback, part 1 includes the RI (if reported), CQI and an indication of the total number of non-zero WB amplitude coefficients for all layers of enhanced type IICSI. Part 2 includes the PMI of enhanced type IICSI.

[0119] If the CSI report on PUSCH includes two parts and the CSI payload to be reported is smaller than the payload size provided by the PUSCH resources allocated for CSI reporting, the UE may partially omit Part 2 CSI.

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

[0121] QCL (quasi-isotope)

[0122] Two antenna ports are quasi-colocated when the channel properties of an antenna port can be derived from the channel of another antenna port. The channel properties may include one or more of delay spread, Doppler spread, frequency / Doppler shift, average received power, receive timing / average delay, and spatial RX parameters.

[0123] A list of multiple TCI state configurations may be configured to the UE via the high-level parameter PDSCH-Config. Each TCI state is associated with a QCL configuration parameter between one or two DL RSs and the DMRS port of the PDSCH. The QCL may include qcl-Type1 for the first DL RS and qcl-Type2 for the second DL RS. The QCL type may correspond to one of the following types.

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

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

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

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

[0128] Beam Management (BM)

[0129] BM is a series of processes for acquiring and maintaining a set of BS (or transmission and reception point (TRP)) beams and / or UE beams that can be used for DL ​​and UL transmission / reception. BM may include the following processes and terms.

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

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

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

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

[0134] BM processing may be divided into (1) DL BM processing using SSB or CSI-RS and (2) UL BM processing using a sounding reference signal (SRS). In addition, each BM processing may include Tx beam sweeping for determining a Tx beam and Rx beam sweeping for determining an Rx beam.

[0135] The DL BM process may include (1) beamforming DL RS (eg, CSI-RS or SSB) transmission from the BS and (2) beam reporting from the UE.

[0136] Here, the beam report may include a preferred DL RS ID and a reference signal received power (RSRP) corresponding to the preferred DL RS ID. The DL RS ID may be a SSB resource indicator (SSBRI) or a CSI-RS resource indicator (CRI).

[0137] Full-duplex operation for NR

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

[0139] In 5G, new types of services such as extended reality (XR), AI-based services, and self-driving cars have been made. These services have the characteristics of dynamically changing traffic in both DL and UL directions, and require low latency in packet transmission. 5G services may experience an explosive increase in traffic load to support these diverse new use cases. On the other hand, existing semi-static or dynamic TDD UL / DL configurations may have limitations in terms of transmission time delay and interference between operators. Existing FDD methods may have limitations in terms of effective frequency resource utilization in the DL / UL direction. Therefore, the introduction of full-duplex operation within a single carrier has been discussed to achieve low latency and efficient resource utilization in NR.

[0140] Reference Figure 8 , showing a method of applying full-duplex operation within a carrier. In detail, full-duplex operation can be considered as Figure 8 The sub-band full-duplex (SB-FD) scheme illustrated in (a) and Figure 8 The spectrum sharing full-duplex (SS-FD) scheme is illustrated in (b).

[0141] For SB-FD, DL and UL transmission and reception can be performed using different frequency resources in the same carrier. That is, DL and UL can have different frequency resources for the same time resources. For SS-FD, DL and UL transmission and reception are performed through the same frequency resources or overlapping frequency resources in the same carrier. That is, for the same time resources, DL and UL can be allocated the same or overlapping frequency resources.

[0142] Full-duplex operation can be combined with existing half-duplex operation. For example, in existing half-duplex-based TDD operation, only some time resources can be used for full-duplex operation. In the time resources for performing full-duplex operation, SB-FD or SS-FD operation can be performed.

[0143] For details, refer to Fig. 9 The time resources may include time resources for half-duplex (HD) operation and time resources for full-duplex (FD) operation, such as SB-FD or SS-FD. The time resources may include some time resources for SB-FD operation and the remaining time resources for HD operation, such as Fig. 9 The time resources may include the time resources for the operation of SS-FD and the remaining time resources for the operation of HD, as shown in (a). Fig. 9In this case, the unit of the time resource (for operation as SS-FD, operation as SB-FD, or operation as HD) may be a time slot or symbol unit. In the time resource for operation as SB-FD, some frequency resources may be used as DL resources, and some frequency resources may be used as UL resources.

[0144] 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.

[0145] 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).

[0146] 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.

[0147] FDR's Background

[0148] Fig. 9 and Fig.10 is a diagram for explaining sub-band full-duplex (SBFD) and single-frequency full-duplex (SFFD) operations.

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

[0151] First, SBFD can consider Fig. 9 (a) and Fig.10 For details, refer to Fig.10 (a), the subband region of DL and the subband region of UL may not overlap with each other. In this case, a guard band may exist between the subband region of DL and the subband region of UL (an example of a time slot configuration). Alternatively, referring to Fig. 9 (a), the SBFD operation may be performed based on a resource pattern of a cell or a BS. For example, in the resource pattern, a half-duplex (HD) time slot / symbol and a SBFD time slot / symbol may be TDMed with each other.

[0152] Alternatively, SFFD may consider Fig. 9 (b) and Fig.10 For details, refer to Fig.10 (b), the DL subband region and the UL subband region may overlap each other. Fig. 9 (b), the SFFD operation may be performed based on a resource pattern of a cell or BS. For example, in the resource pattern, a half-duplex (HD) time slot / symbol and a SBFD time slot / symbol may be TDMed with each other.

[0153] In the above case, SBFD (or SFFD) and dynamic / flexible TDD (hereinafter referred to as d / f TDD) can be considered. In addition, the TDD configuration between cells or BSs may be different. Regarding these two environments, the similarities and differences in CLI are described below.

[0154] (1) In terms of measurement resources

[0155] 1) For d / f TDD

[0156] -Interference source: UE between cells

[0157] -HD time slots only

[0158] 2) For SBFD

[0159] -Interference sources: UEs within a cell and UEs between cells

[0160] -HD time slot and SBFD time slot

[0161] - If the BWP of the SBFD slot is similar to the HD BWP: Same as the HD slot

[0162] --If the BWP of the SBFD slot is different from the HD BWP: for example, measurements outside the active BWP, then the DL / UL subband

[0163] Until Release 17, the existing cross-link interference (CLI) measurement can measure RSRP in the SRS resources according to the existing scenario, and RSSI measurement can be performed for the CLI-RSSI-resource. The SRS resources used for CLI have restrictions on the existing resource configuration, and the CLI-RSSI-resource is a resource configured for the CLI. All these resources are resources in the time domain / frequency domain, and the following configuration is possible for the CLI until Release 17. The method of configuring resources related to the CLI can be briefly summarized as follows (see TS 38.331).

[0164] (2) Measurement resources

[0165] >SRS-Resource

[0166] - The DL BWP id can be indicated to derive the reference point of the SRS resource. In CLI measurements, there is a feature to associate resources (especially DL) to a BWP.

[0167] - For CLI SRS-RSRP measurements

[0168] -- Resource Type: Periodic Type Only (Resource Type = Periodic)

[0169] --Periodicity: time slots 1280, 2560 can be configured (time slot level, 1 to maximum value 640)

[0170] --Number of symbols, repetition factor: n1

[0171] --Frequency hopping: b-hop (symbol level hopping) -> b-SRS (BW of SRS) -> frequency position index is constant (unless reconfigured)

[0172] --Sequence hopping, ptrs port, spatial relationship information->disable

[0173] --SRS Port 1

[0174] >CLI-RSSI-Resource

[0175] -Minimum RB is 4, within the active DL BW

[0176] --Configured to a minimum value of 4 to eliminate ambiguity introduced by the reference SCS (15 to 120 SCS)

[0177] -Symbols within slot boundaries (relative to the reference SCS)

[0178] -UE performs CLI-RSSI measurements using the SCS of the active BWP (regardless of the reference SCS)

[0179] - Periodicity, offset: slot level (1 to maximum 640)

[0180] - QCL-D with the latest received PDSCH and the latest monitored CORESET

[0181] (3) Measurement / report trigger

[0182] >SRS-RSRP, CLI-RSSI

[0183] >Event triggered or periodic

[0184] -i1-Event: Interference exceeds absolute threshold

[0185] - Reporting interval: 120ms to 30min

[0186] Regarding the resources configured according to the above "(1)" and "(2)", the UE may perform CLI measurement, and when the interference measured on the above configured resources exceeds the absolute threshold (i1-threshold), the UE may perform (periodic) measurement on the configured resources and report the measured interference value via L3 signaling. CLI-related reports do not have L1 / L2 signaling. This may be configured to the UE via RRC in association with the existing event-triggered reporting and periodic reporting of CLI. Specifically, the event-triggered reporting and periodic reporting may be configured as shown in Tables 5 and 6 below (see TS 38.331).

[0187] [Table 5]

[0188]

[0189] [Table 6]

[0190]

[0191] Although it is not the purpose of CLI, the existing CSI reporting framework can measure / report L1-RSRP / SINR in CSI-RS resources, and the related features are as follows.

[0192] > Background

[0193] - Best beam index reported via CRI / SS / PBCH Block Resource Indicator (SSBRI) (with L1-RSRP / SINR)

[0194] *SSBRI: SS / PBCH block resource indicator, CRI: CSI-RS resource indicator

[0195] -SINR->Interference for UEs within the cell

[0196] ·>Measurement resources

[0197] -CSI-RS (periodic / semi-persistent / aperiodic)

[0198] -Rx filter with QCL-D

[0199] >Report

[0200] -UCI->Periodic (PUCCH) / Semi-persistent (PUSCH or PUCCH) / Aperiodic (PUSCH)

[0201] -UCI mapping order: CRI->L1-RSRP->RI->LI->filling bits->PMI->CQI

[0202] - Part 1: (CRI / RI / CQI1), Part 2: (PMI / CQI2)

[0203] Regarding the above-mentioned CLI and / or CSI-RS content, when the gNB operates in SBFD (or SFFD) or d / f TDD, interference from inter-cell UEs or interference from intra-cell UEs may be generated (or received). In this case, the measurement / reporting of the existing CLI also needs to be performed quickly. Therefore, for this purpose, it is necessary to perform the measurement / reporting of CLI based on L1 / L2, and the method of performing the measurement / reporting of CLI based on L1 / L2 is described in detail below.

[0204] Existing CLI measurements can be performed on resources configured periodically or when specific events occur. However, when dynamic / flexible TDD or SBFD (or SFFD) is considered, the gNB needs to identify the interference experienced by the UE without making the information obsolete. Alternatively, if scheduling is obtained by a centralized gNB, or multiple gNBs are served by the same operator, or information exchange between gNBs is enhanced, it is expected that CLI measurement results will be applied in the scheduler even if dynamic / flexible TDD and SBFD (or SFFD) are not considered. In this case, the application in the scheduler may require L1 / L2-based CLI measurements and reporting.

[0205] L1 / L2 CLI measurement resource enhancements

[0206] Hereinafter, a method for indicating sending and receiving measurements and reports for UE to UE CLI performed by a UE via L1 / L2 signaling and a method for sending and receiving measurements and reports will be described in detail, but this can be easily extended to gNB to gNB CLI or gNB to UE CLI.

[0207] Unlike the existing L3-based CLI measurement resources, the UE may be instructed to perform CLI measurements via L1 / L2 signaling or report CLI measurement information via L1 / L2 signaling. In this case, the UE may be instructed to perform CLI measurements on enhanced measurement resources that are different from (or based on) the existing L3-based CLI measurement resources. In this case, for each of the duration for which the gNB performs SBFD operation and the duration for which the gNB does not perform SBFD operation, the UE may expect to be (separately) configured with CLI measurement resources. The configuration method related to CLI measurement resources for each duration according to SBFD operation is described in detail in Scenario 1 below. Alternatively, CLI measurement and / or reporting may be performed based on L1 / L2 signaling regardless of the SBFD operation of the gNB. In this case, the enhancement of measurement resources for CLI measurement is described in detail in Scenario 2 below. In Scenario 1, resource configuration may also be performed by considering CLI measurement and / or reporting based on L1 / L2 signaling. The difference between scenario 1 and scenario 2 described below is whether different resources are configured for the duration when the gNB performs SBFD operation and the duration when the gNB does not perform SBFD operation, or whether measurement resources are configured regardless of SBFD operation.

[0208] 1. Scenario 1: SBFD-specific CLI measurements

[0209] Scenario 1 relates to a method for configuring SBFD-specific CLI measurement resources. That is, in scenario 1, for each of the SBFD duration for performing SBFD operation of the gNB and the HD duration for performing HD operation of the gNB, the measurement resources for CLI measurement of the UE can be configured differently. According to the indication method of the SBFD duration, CLI-RSSI measurement resources can be separately allocated for the CLI measurement of the UE for the SBFD duration determined or indicated by the UE. Here, the SBFD duration can be indicated by the gNB through a time slot format, through an instruction related to BWP switching (time resources), or through an instruction even for an unused RB of the same BWP.

[0210] For SBFD (or, for SBFD duration), DL and UL signals may be adjacent to each other (in the frequency domain), and as the DL and UL signals become closer to each other in the frequency domain, the RSSI may increase. Therefore, in a SBFD time slot (or SBFD duration), frequency domain granularity may be applied (separately) to the measurement resources of the CLI (depending on the proximity between the DL and UL frequency bands). In this case, the RSSI in the SBFD time slot may be measured at the sub-band level and may be reported as differential, etc.

[0211] For example, the RSSI measurement of the SBFD slot may be measured separately for each subband, and the difference between the measured RSSI of each subband and the measured value of another subband based on the measured value of the specific subband may be reported as CLI measurement information. In other words, when the UE measures CLI based on the RSSI (or RSRP) of N RBs (or REs) during the duration that the gNB performs SBFD, the UE may divide the frequency resources of the N RBs into k subbands and measure the RSSI in each subband according to the previous protocol or the instruction of the gNB. In this case, the difference may be the difference between the RSSI measured for each subband.

[0212] For example, when the UE is instructed to measure RSSI in 10 RBs during the SBFD duration, the UE may measure the RSSI of each subband including two RBs respectively, and report the difference between the RSSI measured in the five subbands as CLI measurement information to the gNB. In this case, the reference subband may be a subband containing RBs (or REs) with the lowest or highest frequency domain index, and the difference may be calculated based on the RSSI of the reference subband. Alternatively, the difference may mean the difference between the CLI measurement value measured by the UE in the HD duration and the CLI measurement value measured in the SBFD duration.

[0213] 2. Scenario 2: SRS / CLI-RSSI resource enhancement

[0214] In scenario 2, the gNB instructs the UE to perform CLI measurement / reporting via L1 / L2 signaling (e.g., regardless of whether it is SBFD duration). There are several constraints on the SRS and CLI-RSSI resources to be configured for existing CLI measurements (see TS 38.331). However, the SRS and CLI-RSSI resources that can be configured for existing CLI measurements are resources for L3 measurements, and therefore several existing restrictions need to be alleviated to support dynamics through L1 / L2 measurements and / or reporting. In the following, the following options may be considered as options that alleviate some existing restrictions. CLI measurement resources may be enhanced by applying at least one of the options described below.

[0215] (1) Alternative 1

[0216] Constraints on existing CLI measurement resources can be alleviated and taken into account.

[0217] Alternatively, it can be considered that the constraints on SRS resources or CLI-RSSI resources of existing CLI measurement resources are alleviated. For example, when configuring SRS resources for existing CLI measurements, only periodic resources can be configured, and when configuring CLI-RSSI resources, periodicity needs to be always configured together. On the contrary, for instantaneous measurements of L1 / L2, periodicity can be disabled in the configuration of CLI-RSSI resources, and non-periodic resources can be configured, or non-periodic resources can be configured / indicated in the configuration of SRS resources. Here, the deactivation of the periodicity of the CLI-RSSI resources means configuring the resources to be similar to the non-periodic resources of SRS by ignoring the periodicity and offset of the existing configuration and only considering the symbol position within the time slot and the resource position in the frequency domain. That is, periodic deactivation can mean reusing existing CLI-RSSI resources without being subject to time domain restrictions based on existing periodicity and offset.

[0218] (2) Alternative 2

[0219] In alternative 2, it may be considered to configure CLI measurement resources taking beams into consideration.

[0220] Unlike the restriction that the TCI state may not be configured for SRS resources for legacy CLI, the configuration of the TCI state for SRS resources for legacy CLI related to L1 / L2 signaling may be allowed. Alternatively, the configuration of the TCI state for CLI-RSSI resources may be considered. In this way, the assignment of the TCI state ID to the measurement resources for CLI is not intended to establish a relationship with reference signals such as existing SSBs or CSI-RS, but may be intended to use the target cell or another UE as its source. Alternatively, the configuration of the TCI state ID to the measurement resources for CLI may be intended to provide spatial relationship information with other reference signals. In this case, if the TCI state ID or the spatial relationship information is not configured, or if the CLI is measured in the beam direction of the latest PDSCH or PDCCH as described above, the beam direction of the latest PDSCH or PDCCH may be interpreted differently than before (the beam instruction for receiving the existing CLI-RSSI resources is configured as the QCL-D with the latest received PDSCH and the latest monitored CORESET). In contrast, in the case of CLI measurement for an HD slot, the beam direction of the latest PDSCH or PDCCH may be the direction of the PDSCH or CORESET received in the most recent HD slot.

[0221] When configuring CLI measurement resources considering beams by using the above method (TCI state ID configuration, etc.), the following contents can be considered.

[0222] The UE may be configured with multiple TCI state IDs instead of a single TCI state ID for the CLI measurement resource. In this case, the UE may report the CLI measurement results of at least one specific ID among the TCI state IDs according to the previous protocol and protocol or instruction. For example, the UE may also report information about the lowest or highest measured CLI TCI state ID (TCI state ID) together with the CLI measurement results. The gNB may determine that the beam corresponding to the TCI state ID with the lowest CLI among the reported TCI state IDs is the desired beam suitable for UE reception. Alternatively, the gNB may determine / decide that the beam corresponding to the TCI state ID with the highest CLI among the reported TCI state IDs is a prohibited / undesirable beam that is not suitable for UE reception. Here, the reference value associated with the highest or lowest CLI may be based on an existing configuration (such as RSSI / RSRP), or based on or according to a new metric (e.g., SINR).

[0223] Alternatively, even if the UE is instructed to report both CLI measurements and TCI State ID, the UE may report only the TCI State ID in the CLI report, excluding information such as RSSI / RSRP. In other words, the UE may report only the TCI State ID without reporting CLI measurement information such as RSSI / RSCP, regardless of the instruction to report CLI measurements and TCI State ID. For example, the UE may report only the TCI State ID with the lowest CLI to the gNB as information about a desired beam suitable for reception based on a pre-agreed metric such as RSSI, RSRP, or SINR. Alternatively, the UE may report only information about the TCI State ID with the highest CLI to the gNB as information about a forbidden / undesired beam not suitable for reception based on a pre-agreed metric such as RSSI, RSRP, or SINR.

[0224] Alternatively, the gNB may configure the UE to report CLI measurements based on metrics such as RSSI / RSRP without assigning a TCI state ID for CLI measurements. In this case, even if the gNB has a configuration to report information about desired and / or prohibited / undesired beams to the gNB, the UE may report to the gNB a CLI measurement report including only the TCI state IDs corresponding to the desired and / or prohibited / undesired beams.

[0225] (3) Alternative 3

[0226] In alternative 3, for case 3, resources may be set for measurement metrics other than the existing measurement metrics (SRS-RSRP or CLI-RSSI). In detail, enhancements to resource configuration for changing measurement metrics may be considered. In other words, resource configuration related to CLI measurement may be enhanced by changing the measurement metric. For example, SRS resources may be allowed in existing CLI measurement resources, but only sequence-based RSRP measurements may be allowed. CLI-RSSI resources are configured without sequences, and only RSSI measurement is possible, and resource configuration at the RB level is not possible. Here, the CLI-RSSI resource is not configured to the RE level because the (CLI-RSSI) resource is configured within the active DL BWP to configure the (CLI-RSSI resource) based on the reference SCS, and in addition, synchronization between the attacker and victim UEs is not obtained, making accurate (RSSI) measurement almost impossible. However, for a gNB that performs SBFD, UE-to-UE CLI measurement and / or reporting between UEs within a cell is possible (or, even if SBFD is not considered, timing enhancements for inter-UE CLI measurements may be considered). In this case, CLI-RSSI resources may be configured or allocated to the RE level, or may be necessary. That is, the gNB may instruct the UE to apply a specific timing advance, etc. to perform CLI measurements, in which case RSSI measurements at the RE level may be possible or necessary. In such an environment, in order to configure or indicate the resources for RSSI to the RE level, the gNB may instruct the UE to report RSSI while disabling the sequence of SRS resources used for CLI measurements of the UE, or may configure CLI-RSSI resources with RE level granularity while configuring / instructing the UE to perform CLI measurements / reporting of RSSI on the CLI-RSSI resources. Here, the meaning of disabling the sequence of SRS resources is that in the existing (SRS resource) configuration, RSRP measurements can be performed based on the sequence that is always present in the SRS resources, but for RSSI measurements in the SRS resources, only the resource position in the time domain / frequency domain is used without the sequence, and RSSI is measured in the resource at that position. In other words, when the sequence used for the SRS resource is disabled, the UE can measure the RSSI without using the sequence configured at the SRS resource location according to the SRS resource configuration, and report the measured RSSI as CLI measurement information to the gNB.

[0227] (4) Alternative 4

[0228] In alternative 4, unlike the existing measurement resources, it may be considered to configure TA information. In other words, alternative 4 may be a method of enhancing CLI measurement by additionally configuring TA information related to CLI measurement resources. For example, the UE may configure / receive the timing advance of the cell to which the potential attacker UE to generate the UE-to-UE CLI from the gNB according to the configuration of RRC / MAC-CE / DCI, etc. as TA information. Alternatively, the UE may obtain / estimate the timing advance of the cell to which the potential attacker UE to generate the UE-to-UE CLI based on the reference signal of the cell to which the potential attacker UE belongs, or through signaling from the cell to which the potential attacker UE belongs.

[0229] When or after configuring the CLI measurement resources, the UE may receive from the gNB a mapping relationship between the CLI measurement resources and the TA of the potential aggressor UE (or candidate cell). The UE may perform and report the corresponding CLI measurement by applying such a TA or multiple TAs. In other words, the UE may perform measurement / report on the CLI measurement resources by considering and applying the mapping relationship between the CLI measurement resources and the TA.

[0230] Alternatively, the UE may be configured with the cell ID and TA information of the cell to which the potential attacker UE belongs, or the UE may be configured with the cell ID and TA information based on the configured TA information and / or the estimated / determined TA information. In other words, the UE may estimate / determine the cell ID and / or TA information of the cell to which the potential attacker UE belongs based on the configured TA or the estimated TA. Based on such information (e.g., TA information), the UE may also report the CLI measurement result and the cell ID corresponding to the CLI measurement result (e.g., the ID of the cell associated with another UE that generates the UE to UE CLI) in the report of the CLI measurement result. That is, when there are multiple {cell ID, TA} (mapping) information and CLI measurement and / or reporting is configured, the UE may report the cell ID corresponding to the TA performing the CLI measurement together or in association with the CLI measurement report. In other words, based on the mapping relationship between multiple cell IDs and TA information, the UE may also include the cell ID of the cell for which the estimated TA value is configured based on the CLI measurement timing in the report of the CLI measurement information.

[0231] Hereinafter, CLI measurement / reporting considering TA information is described in detail.

[0232] Timing Information

[0233] Fig.11 and Fig.12 is a diagram for explaining a method of performing CLI measurement / reporting based on TA information by a UE.

[0234] The timing of existing CLI measurements depends on the UE implementation. However, for accurate CLI measurements, accurate CLI timing needs to be configured. According to a predetermined scenario (protocol in Release 18 NR mobility enhancement), TA acquisition for candidate cells for candidate cells can be supported before the L1 / L2 cell switching command. Similar to the case of gNB to gNB CLI, a candidate cell is a cell to which the UE may potentially switch, and can therefore be referred to as a neighbor cell or candidate cell. This means that, considering the above-mentioned inter-cell UE CLI scenario, a candidate cell can be determined as a cell serving the attacker UE (when all UEs are at the cell edge). In an inter-cell CLI environment, it can be assumed that UEs that know the TA information of the candidate cell to which the attacker UE belongs and UEs that do not know the TA information coexist in the network. This can be explained by distinguishing UEs based on whether the UE has the ability to obtain TA information of neighboring cells. First, a UE without this capability may not know the timing information between UEs and has no information for inferring the timing information, and therefore it may be difficult to consider additional enhancements to the above-mentioned CLI measurements.

[0235] A UE with this capability can distinguish which cell the measured CLI is for (or which cell UL of the UE belongs to) based on the UL TA of the candidate cell. Fig.11 As shown, an inter-cell CLI environment can be considered, where the victim UE and the aggressor UE are located at the cell edge.

[0236] Reference Fig.11 , gNB1 performs transmission of DL signals, and UE1 receiving service from gNB1 can receive DL signals from gNB, and UE1 can be a large team UE. Both gNB2 and gNB3 have link direction UL (i.e., reception of UL signals), and both the first UE (UE served by gNB2) and the second UE (UE served by gNB3) can be attacker UEs that perform transmission of UL signals. In this case, UE1 has the ability to obtain TA information of the above-mentioned candidate cells, and can have TA information of the above-mentioned candidate cells (i.e., gNB2 or gNB3). UE1, the first UE, and the second UE can be located close enough to each other so that CLI may occur between UE1, the first UE, and the second UE. When UE1, the first UE, and the second UE are not adjacent to each other, the probability that UE1 experiences CLI due to the first UE and the second UE transmitting UL signals may be low because the transmission power of the first UE and the second UE is not large.

[0237] Reference Fig.12 , illustrating an example of a timeline of transmission / reception between the above-mentioned UE1, the first UE and the second UE.

[0238] like Fig.12As shown, the timing of the CLI received by UE1 from the first UE (UE served by gNB2) (or the UL signal reception timing of the first UE for which UE1 generates CLI) can be similar to the timing advance with respect to UE1 to gNB2, and the measurement timing of the CLI of the UL received by UE1 from the second UE (UE served by gNB3) (or the UL signal reception timing of the second UE for which UE1 generates CLI) can be similar to the timing advance with respect to UE1 to gNB3. This is because the distances between the multiple UEs (UE1, the first UE, and the second UE) are close. Here, the TA of gNB2 known to UE1 can be a value that is advanced from the reception time of gNB2 by the propagation delay of the channel between UE1 and gNB2, and the time when the first UE sends a UL signal to gNB2 can be a value that is advanced from the reception time of gNB2 by the propagation delay of the channel between the first UE and gNB2. In this case, the propagation delay in the channel between UE1 and gNB2 can be similar to the propagation delay in the channel between the first UE and gNB2. Therefore, the TA information (TA value) of the candidate cell possessed by UE1 can be used to more accurately measure the CLI generated by the attacker UE belonging to the candidate cell (for example, for timing alignment or RSSI measurement at the RE level). Depending on the cell deployment, the TA information (TA value) of the candidate cell possessed by UE1 can be used to distinguish in which cell the attacker UE is located.

[0239] As described above, when the UE has or is able to obtain the TA information of the candidate cell, when performing CLI measurement and reporting CLI measurement information according to the configuration / instructions of L1 / L2-based UE-to-UE CLI measurement / reporting configured by the gNB, the UE may also include in the CLI measurement information information information about the TA value (based on the TA information of the candidate cell) having the maximum CLI measurement value or the cell ID to which the attacker UE corresponding to the maximum CLI measurement value belongs, and report the CLI measurement information to the gNB.

[0240] Fig.13 is a diagram for explaining a method of performing CLI measurement by a UE.

[0241] Reference Fig.13 , the UE may receive information about CLI measurement resources for CLI measurement from the BS (S131). As described above, the CLI measurement resources may include SRS resources and / or CLI-RSSI resources. The information about the CLI measurement resources may be included in the reference Figure 7 In the CSI resource configuration described, or it can be separately indicated by RRC signaling, etc. Here, the BS can be a network or a gNB.

[0242] Then, the UE may measure the CLI based on the CLI measurement resource (S133). For example, the UE may measure the (UE-to-UE) CLI in the CLI measurement resource by measuring the RSSI or RSRP of the UL signal received from the CLI measurement resource. The UE may obtain information about the measurement timing, which is the timing of measuring the CLI, from the CLI measurement resource. The UE may measure / calculate multiple CLIs from the CLI measurement resource (or each of multiple CLI measurement resources). In this case, the UE may measure / calculate the measurement timing of each of the multiple CLIs.

[0243] Alternatively, the UE may perform CLI measurement at the RE level as described above. For example, the UE may receive or configure information about a specific TA of the CLI-RSSI resource from the BS. In this case, the UE may time-align the CLI-RSSI at the RE level by applying the specific TA to the CLI-RSSI resource, and measure the (intra-cell) CLI at the RE level by applying the CLI-RSSI of the specific TA.

[0244] Then, the UE may report / send measurement information including information about the measured CLI to the BS (S135). Alternatively, when the UE measures multiple CLIs in the CLI measurement resource (or multiple CLI measurement resources), the UE may report / send measurement information including multiple CLIs to the BS, or report / send measurement information including a CLI having a maximum value among the multiple CLIs to the BS.

[0245] Alternatively, the UE may also include information of a cell ID associated with the measured CLI in the measurement information, and send / report the information to the BS. As described above, when the UE has the ability to receive TA information of a candidate cell, the UE may determine the cell ID associated with the measured CLI based on the TA information. In detail, the UE may estimate a first TA based on the measurement timing of the measured CLI, which is a TA value associated with the CLI. For example, the measured CLI is a value measured for a UL signal received from a neighboring UE, and thus the measurement timing of the CLI may be related to the transmission timing of the UL signal of the surrounding UE. Therefore, as described with reference to Fig.12As described, the UE can estimate the TA value used for the transmission of the UL signal of the surrounding UEs that generate the CLI through the measurement timing of the CLI. For example, the UE can estimate the first TA, which is the TA value related to the CLI measurement, by determining how much the measurement timing of the CLI is advanced relative to the reference timing (or synchronization timing) obtained through system information, etc. In this case, the UE can determine a TA value (or a second TA value) that is similar to the first TA value (i.e., having a difference within a predefined range) from among multiple TA values ​​included in the received TA information, and can determine a candidate cell mapped to the second TA value from among multiple candidate cells. The UE can also include the ID of the candidate cell in the measurement information and report / send the ID to the BS.

[0246] Alternatively, as described above, when measuring multiple CLIs in multiple CLI measurement resources, the UE may determine a first TA value based on the measurement timing of the highest CLI among the multiple CLIs, determine a second TA value corresponding to the first TA value, and specify a cell corresponding to the second TA value. In this case, the UE may report / send measurement information to the BS, the measurement information also including information about a cell ID estimated to be the measurement timing of the highest CLI.

[0247] Alternatively, among the CLI measurement resources, the SRS resource may have at least one preset transmission configuration indicator (TCI) state information. In this case, the UE may also include the TCI state information configured for the SRS resource measured for the CLI in the measurement information, and report / send the information to the BS. Alternatively, as described above, when multiple CLIs are measured in multiple SRS resources, the UE may report / send measurement information to the BS, and the measurement information also includes the TCI state information configured in the SRS resource for measuring the highest CLI among the multiple CLIs.

[0248] Fig.14 is a diagram for explaining a method of receiving, by a BS, CLI measurement information from a UE.

[0249] Reference Fig.14 , the BS (or network) may send information about CLI measurement resources for CLI measurement to the UE (S141). As described above, the CLI measurement resources may include SRS resources and / or CLI-RSSI resources. The information about the CLI measurement resources may be included in the reference Figure 7 The CLI resource configuration described in the specification may also be indicated separately through RRC signaling or the like.

[0250] Alternatively, the BS may instruct the terminal to perform CLI measurement at the RE level as described above using a specific TA value. In this case, the BS may apply a specific TA to the CLI-RSSI resources of the UE, and the UE may measure the CLI in the CLI-RSSI resources time-aligned at the RE level. For example, this may involve CLI measurement for an intra-cell.

[0251] Then, the BS may report or receive measurement information including information about the measured CLI from the UE (S143). Alternatively, if the UE measures multiple CLIs from multiple CLI measurement resources, the BS may report / receive measurement information including multiple CLIs, or report / receive measurement information including a CLI having a maximum value among the multiple CLIs.

[0252] Alternatively, the BS may report / receive measurement information from the UE, the measurement information also including information about the cell ID associated with the measured CLI. As described above, when the UE has the capability to receive TA information of the candidate cell, the UE may determine the cell ID associated with the measured CLI based on the TA information. In this case, as described with reference to Fig.13 As described, the UE may determine a candidate cell corresponding to the measured CLI, and the BS may receive / report measurement information from the UE, the measurement information also including information about a cell ID determined based on a measurement timing of measuring the CLI and TA information of the candidate cell.

[0253] Alternatively, as described above, when measuring a plurality of CLIs in a plurality of CLI measurement resources, the BS may receive measurement information including a cell ID determined based on the measurement timing and TA information of the highest CLI among the plurality of CLIs from the terminal.

[0254] Alternatively, if the BS has at least one preset transmission configuration indicator (TCI) state information of the SRS resource in the CLI measurement resource, the BS may report / receive measurement information from the UE, the measurement information also including TCI state information configured for the SRS resource on which the CLI is measured. Alternatively, as described above, when multiple CLIs are measured in multiple SRS resources, the BS may report / receive measurement information from the UE, the measurement information also including TCI state information configured in the SRS resource on which the highest CLI among the multiple CLIs is measured.

[0255] In this way, a UE capable of acquiring TA information about surrounding cells can accurately determine / estimate information about cells related to the measured CLI based on the CLI measurement timing through signals of surrounding UEs related to the measurement of CLI and TA information about surrounding cells. The UE can report CLI measurement information, which additionally includes a cell ID corresponding to the CLI measured according to the above method, thereby clearly distinguishing whether the CLI measurement value is generated by an inter-cell environment or an intra-cell environment, and reporting the measurement information. In this case, considering the occurrence factors of CLI clearly identified by the measurement information, the BS can minimize the occurrence of CLI due to intra-cell and / or inter-cell by scheduling SBFD time slots, HD time slots, etc.

[0256] Communication system example to which the present disclosure is applied

[0257] 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.

[0258] 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.

[0259] Fig.15 A communication system applied to the present disclosure is illustrated.

[0260] Reference Fig.15, the communication system 1 applied to the present disclosure includes a wireless device, a base station (BS), and a network. Herein, the wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or long term evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include (but is not limited to) a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices, and may be implemented in the form of a head mounted device (HMD), a head up display (HUD) installed in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, a digital sign, a vehicle, a robot, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0261] 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). IoT devices (e.g., sensors) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100a to 100f.

[0262] 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.

[0263] Examples of wireless devices to which the present disclosure is applied

[0264] Fig.16 A wireless device suitable for use with the present disclosure is illustrated.

[0265] 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}.

[0266] 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.

[0267] According to an example, the first wireless device 100 or UE may include a processor 102 and a memory 104 connected to an RF transceiver. The memory 104 may include a processor capable of executing Figures 8 to 13 At least one procedure of the operations related to the embodiments described in the present invention.

[0268] In detail, the processor 102 can control the RF transceiver 106 to receive timing advance (TA) information of the candidate cell, receive information about CLI measurement resources for measuring CLI, measure CLI based on the CLI measurement resources, determine a cell identifier (ID) related to the CLI based on the measurement timing and TA information of the measured CLI, and send measurement information including information about the measured CLI and cell ID to the BS.

[0269] Alternatively, a chipset including a processor 102 and a memory 104 may be provided. In this case, the chipset may include at least one processor and at least one memory operatively connected to the at least one processor, and when executed, causes the at least one processor to perform operations, and the operations may include: receiving timing advance (TA) information about a candidate cell; receiving information about a CLI measurement resource for CLI measurement; measuring CLI based on the CLI measurement resource; determining a cell identifier (ID) related to the CLI based on the measurement timing of the measured CLI and the TA information; and sending measurement information including information about the measured CLI and the ID to the BS. The at least one processor may perform reference operations based on a program contained in the memory. Figures 8 to 13 The operation of the embodiments is described.

[0270] A computer-readable storage medium including at least one computer program may be provided, the at least one computer program causing the at least one processor to perform operations, and the operations may include: receiving timing advance (TA) information about a candidate cell; receiving information about a CLI measurement resource used for CLI measurement; measuring CLI based on the CLI measurement resource; determining a cell identifier (ID) related to the CLI based on the measurement timing and TA information of the measured CLI; and sending measurement information including information about the measured CLI and the ID to a BS.

[0271] 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.

[0272] According to an embodiment, the BS or the network may include a processor 202, a memory 204, and / or a transceiver 206. The processor 202 may control the transceiver 206 or the RF transceiver to transmit information about a CLI measurement resource for measuring the CLI to the UE, and receive measurement information including the CLI measured based on the CLI measurement resource from the UE, and the measurement information may further include information about a cell ID determined based on a measurement timing for measuring the CLI and timing advance (TA) information for a candidate cell.

[0273] 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.

[0274] 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.

[0275] 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.

[0276] 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.

[0277] Application examples of wireless devices to which the present disclosure is applied

[0278] Fig.17 Another example of a wireless device to which the present disclosure is applied is shown.

[0279] 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.

[0280] 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.

[0281] 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.

[0282] 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.

[0283] 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.

[0284] 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).

[0285] 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.

[0286] 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.

[0287] 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.

[0288] Industrial availability

[0289] The embodiments of the present disclosure as described above can be applied to various mobile communication systems.

Claims

1. A method for performing cross-link interference (CLI) measurement by a user equipment (UE) in a wireless communication system, the method comprising: receiving information about a CLI measurement resource for measuring the CLI; as well as sending measurement information including the CLI measured based on the CLI measurement resource to a base station BS, Wherein, based on receiving the timing advance TA information for the candidate cell, the measurement information further includes information about a cell identifier ID determined based on the measurement timing of measuring the CLI and the TA information.

2. The method according to claim 1, wherein: The TA information includes multiple TA values ​​for multiple candidate cells.

3. The method according to claim 1, further comprising: estimating a first TA value associated with the measured CLI based on the measurement timing; as well as determining a second TA value corresponding to the first TA value from among TA values ​​for a plurality of cells provided in the TA information, The cell ID is an ID of a candidate cell corresponding to the second TA value among multiple candidate cells.

4. The method according to claim 3, wherein: Based on a plurality of CLIs measured in the CLI measurement resource, the first TA value is a TA value estimated based on a measurement timing for a CLI having a highest value among the plurality of CLIs measured in the CLI measurement resource.

5. The method according to claim 1, wherein: The CLI measurement resource is a sounding reference signal SRS resource used to measure the CLI, and The SRS resource has at least one preset transmission configuration indicator TCI state information.

6. The method according to claim 5, wherein: The measurement information also includes TCI status information of the SRS resource configuration measured by the CLI.

7. The method according to claim 6, wherein: Based on multiple CLIs measured in the CLI measurement resource, the CLI state information provided in the measurement information is TCI state information of the SRS resource configuration for the CLI with the highest value or the CLI with the lowest value among the multiple CLIs measured.

8. The method according to claim 1, further comprising receiving, from the BS, configuration information of a specific TA related to a CLI received signal strength indicator (RSSI) resource provided in the CLI measurement resource.

9. The method according to claim 8, wherein: The UE measures the CLI for the CLI-RSSI resource by applying the specific TA value to the CLI-RSSI resource. 10 . A computer-readable recording medium having recorded thereon a program for executing the method according to claim 1 .

11. A user equipment UE for performing measurements related to cross-link interference CLI in a wireless communication system, the UE comprising: Radio frequency RF transceiver; as well as a processor connected to the RF transceiver, The processor controls the RF transceiver to receive timing advance TA information for a candidate cell, receive information about a CLI measurement resource used to measure the CLI; measure the CLI based on the CLI measurement resource, determine a cell identifier ID related to the CLI based on a measurement timing of measuring the CLI and the TA information, and send measurement information including information about the measured CLI and the cell ID to a base station BS.

12. The UE according to claim 11, wherein: The processor is configured to estimate a first TA value related to the measured CLI based on the measurement timing, and determine a second TA value corresponding to the first TA value from among TA values ​​for a plurality of candidate cells provided in the TA information, and The cell ID is an ID of a candidate cell corresponding to the second TA value among the plurality of candidate cells.

13. A chipset for performing measurements related to cross-link interference (CLI) in a wireless communication system, the chipset comprising: at least one processor; as well as at least one memory operatively connected to the at least one processor and which, when executed, causes the at least one processor to perform operations, The operation includes receiving timing advance TA information for a candidate cell, receiving information about a CLI measurement resource used to measure the CLI; measuring the CLI based on the CLI measurement resource, determining a cell identifier ID related to the CLI based on the measurement timing of measuring the CLI and the TA information, and sending measurement information including information about the measured CLI and the cell ID to a base station BS.

14. A method for receiving measurement information related to cross-link interference CLI by a base station BS in a wireless communication system, the method comprising: Sending information about CLI measurement resources for measuring the CLI to a user equipment UE; as well as receiving, from the UE, measurement information including the CLI measured based on the CLI measurement resource, The measurement information further includes information about a cell ID determined based on a measurement timing of measuring the CLI and timing advance TA information for a candidate cell.

15. A base station BS for receiving measurement information related to cross-link interference CLI in a wireless communication system, the BS comprising: Radio frequency RF transceiver; as well as a processor connected to the RF transceiver, wherein the processor controls the RF transceiver to send information about a CLI measurement resource for measuring the CLI to the UE, and receives measurement information including the CLI measured based on the CLI measurement resource from the UE, and The measurement information also includes information on a cell ID determined based on a measurement timing for measuring the CLI and timing advance TA information for a candidate cell.

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