Method for performing communication in wireless communication system, network node, processing apparatus, and storage medium

Abstract

A method of performing communication in a wireless communication system and an apparatus therefor are provided. The method and apparatus may be used to: transmit, to a neighboring network node, first expected time division duplex (TDD) configuration information on a time period interval of time division duplex, the time period interval including one or more downlink time intervals and one or more uplink time intervals; and receiving second expected TDD configuration information including second beam information from the neighboring network, in which the first expected TDD configuration information includes first beam information on a first time period interval among the time period intervals.

Description

Technical Field

[0001] The present disclosure relates to a wireless communication system. Background Art

[0002] Various technologies such as machine-to-machine (M2M) communication, machine-type communication (MTC), and various devices requiring high data throughput (e.g., smart phones and tablet personal computers (PCs)) have emerged and become popular. Therefore, the data throughput required to be processed in cellular networks has increased rapidly. In order to meet this rapidly increasing data throughput, carrier aggregation technology or cognitive radio technology for effectively using more frequency bands and multiple input multiple output (MIMO) technology or multiple base station (BS) cooperation technology for increasing the data capacity transmitted on limited frequency resources have been developed.

[0003] As more and more communication devices require greater communication capacity, enhanced mobile broadband (eMBB) communication is needed relative to traditional radio access technology (RAT). In addition, massive machine type communication (mMTC), which provides various services anytime and anywhere by connecting multiple devices and objects to each other, is a major issue to be considered in next-generation communications.

[0004] Discussions are also underway to design communication systems that take into account services / user equipment (UE) that are sensitive to reliability and latency. Discussions are also underway to introduce next generation RATs that take into account eMBB communications, mMTC, ultra-reliable low latency communications (URLLC), etc. Summary of the invention

[0005] Technical issues

[0006] With the introduction of new wireless communication technologies, new methods to efficiently measure and / or avoid cross-link interference (CLI) are needed to address the challenges of CLI measurement and avoidance.

[0007] Additionally, methods of CLI measurement and / or avoidance between base stations (BSs) are supported for efficient CLI management in dynamic / flexible time division duplex (TDD) or sub-band full duplex (SBFD) operations.

[0008] The objects to be achieved by using the present disclosure are not limited to those specifically described above, and other objects not described herein will be more clearly understood by those skilled in the art from the following detailed description.

[0009] Technical Solution

[0010] In one aspect of the present disclosure, a method for performing communication between a network node and a neighboring network node in a wireless communication system is provided herein. The method includes the following steps: sending first expected time division duplex (TDD) configuration information about a time periodic period to the neighboring network node, the time periodic period including one or more downlink time periods and one or more uplink time periods to which TDD is applied; and receiving second expected TDD configuration information including second beam information from the neighboring network node. The first expected TDD configuration information may include first beam information about a first time period within the time periodic period.

[0011] In another aspect of the present disclosure, a processing device configured to control a network node is provided herein. The processing device includes: at least one processor; and at least one memory connected to the at least one processor and storing instructions. Based on execution by the at least one processor, the instructions cause the network node to: send first expected TDD configuration information about a time periodic period to an adjacent network node, the time periodic period including one or more downlink time periods and one or more uplink time periods for applying TDD; and receive second expected TDD configuration information including second beam information from the adjacent network node. The first expected TDD configuration information includes first beam information about a first time period within the time periodic period.

[0012] In another aspect of the present disclosure, a computer-readable storage medium is provided herein. The computer-readable storage medium stores at least one computer program including instructions, which, when executed by at least one processor, causes the at least one processor to perform operations for a network node. The operations include: sending first expected TDD configuration information about a time periodicity period to an adjacent network node, the time periodicity period including one or more downlink time periods and one or more uplink time periods for applying TDD; and receiving second expected TDD configuration information including second beam information from an adjacent network node. The first expected TDD configuration information includes first beam information about a first time period within the time periodicity period.

[0013] In another aspect of the present disclosure, a network node configured to perform communication with an adjacent network node in a wireless communication system is provided herein. The network node includes: at least one transceiver; at least one processor; and at least one computer memory, which is operatively connected to the at least one processor and stores instructions, and the instructions, when executed, cause the at least one processor to perform operations. The operations include: sending first expected TDD configuration information about a time periodic period to an adjacent network node, the time periodic period including one or more downlink time periods and one or more uplink time periods for applying TDD; and receiving second expected TDD configuration information including second beam information from the adjacent network node. The first expected TDD configuration information includes first beam information about a first time period within the time periodic period.

[0014] In various aspects of the present disclosure, the method or operation may further include configuring a beam direction for communication with a user equipment (UE) based on the first expected TDD configuration information and the second beam information.

[0015] In various aspects of the present disclosure, the first beam information may include a transmission configuration indication (TCI) state identification (ID) related to the first time period.

[0016] In various aspects of the present disclosure, the first beam information may include beam index information related to the first time period.

[0017] In various aspects of the present disclosure, the first beam information may include information about a transmit reception point (TRP) ID enabled in a first time period.

[0018] In various aspects of the present disclosure, the first time period may be a time period configured for a sub-band full-duplex (SBFD) operation of the network node within a time periodic period.

[0019] In various aspects of the present disclosure, the first time period may be a second time period for sending a cell-specific downlink signal in one or more downlink time periods or a third time period for receiving a cell-specific uplink signal in one or more uplink time periods.

[0020] In various aspects of the present disclosure, the time periodic period may further include at least one flexible time period, and the first time period may be the at least one flexible time period.

[0021] In various aspects of the present disclosure, the second time period may be a time period configured for transmission of a synchronization signal block (SSB), a time period configured for transmission of a channel state information reference signal (CSI-RS), a time period configured for transmission of a type 0 physical downlink control channel (type0-PDCCH), or at least one of a time period in a specific control resource set (CORESET), and the third time period may be a time period configured for reception of a random access channel (RACH).

[0022] In various aspects of the present disclosure, based on the frequency band for the first time period being divided into a first subband for downlink and a second subband for uplink, the first beam information may include information about at least one of a beam direction for the first subband or a beam direction for the second subband.

[0023] The above solutions are only some examples of the present disclosure, and those skilled in the art can deduce and understand various examples into which the technical features of the present disclosure are incorporated from the following detailed description.

[0024] Beneficial Effects

[0025] According to some implementations of the present disclosure, cross-link interference (CLI) avoidance may be performed efficiently.

[0026] According to an implementation of the present disclosure, the time required for a base station (BS) to perform CLI measurement may be reduced.

[0027] According to an implementation of the present disclosure, the beam direction may be adjusted by exchanging beam information between BSs.

[0028] Effects according to the present disclosure are not limited to those specifically described above, and other effects not described herein will be more clearly understood by those skilled in the art to which the present disclosure relates from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate examples of implementations of the disclosure and together with the detailed description serve to explain the implementations of the disclosure.

[0030] Figure 1 The structure of a Long Term Evolution (LTE) system is shown.

[0031] Figure 2 Shown is the structure of a New Radio (NR) system.

[0032] Figure 3 An example of a frame structure available in a wireless communication system based on the 3rd Generation Partnership Project (3GPP) is shown.

[0033] Figure 4 A resource grid showing time slots.

[0034] Figure 5 The time slot structure used in the 3GPP-based system is shown.

[0035] Figure 6 A diagram for explaining physical channels available in a 3GPP-based wireless communication system and a signal transmission method using the channels.

[0036] Figure 7 An exemplary flow of a method for performing cross-link interference (CLI) measurement is shown.

[0037] Figure 8 is a diagram for explaining a method for performing full-duplex operation in an NR system.

[0038] Fig. 9 and Fig.10 is a diagram for explaining sub-band full-duplex (SBFD) and single-frequency full-duplex (SFFD) operations.

[0039] Fig.11 An exemplary process of a communication method performed by a network node according to some implementations of the present disclosure is shown.

[0040] Fig.12 An example of a communication system 1 to which an implementation of the present disclosure is applied is shown.

[0041] Fig.13 is a block diagram illustrating an example of a communication device capable of executing the method according to the present disclosure.

[0042] Fig.14 Another example of a wireless device capable of performing implementations of the present disclosure is shown. DETAILED DESCRIPTION

[0043] Hereinafter, implementations according to the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description given below with reference to the accompanying drawings includes specific details in order to provide a thorough understanding of the present disclosure. However, it will be apparent to those skilled in the art that the present disclosure can be practiced without these specific details.

[0044] In some cases, known structures and devices may be omitted or may be shown in block diagram form, thereby focusing on important features of the structures and devices so as not to obscure the concepts of the present disclosure. The same reference numerals will be used throughout the present disclosure to refer to the same or similar parts.

[0045] The following techniques, devices and systems can be applied to various wireless multiple access systems. For example, multiple access systems may 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, etc. CDMA can be implemented by radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented by radio technologies such as Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), Enhanced Data Rate for GSM Evolution (EDGE) (i.e., GERAN), etc. OFDMA can be specifically implemented by radio technologies such as Institute of Electrical and Electronics Engineers (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), and 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of E-UMTS using E-UTRA. 3GPP LTE adopts OFDMA on downlink (DL) and SC-FDMA on uplink (UL). LTE-advanced (LTE-A) is an evolved version of 3GPP LTE. 3GPP New Radio or New Radio Technology (3GPP NR) is an evolved version of 3GPP LTE / LTE-A.

[0046] For the convenience of description, the description will be given under the assumption that the present disclosure is applied to LTE and / or new RAT (NR). However, the technical features of the present disclosure are not limited thereto. For example, although the following detailed description is given based on a mobile communication system corresponding to a 3GPP LTE / NR system, the mobile communication system is applicable to any other mobile communication system except for matters specific to the 3GPP LTE / NR system.

[0047] For terms and techniques not described in detail among the terms and techniques used in the present disclosure, reference may be made to standard specifications based on 3GPP (for example, 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321, 3GPP TS 36.300, 3GPP TS 36.331, 3GPP TS 37.213, 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.214, 3GPP TS 38.300, 3GPP TS 38.321, 3GPP TS 38.331, 3GPP TS 38.423, etc.).

[0048] In an example of the present disclosure described later, if a device "assumes" something, this may mean that a channel transmission entity transmits a channel in accordance with the corresponding "assumption". This may also mean that a channel reception entity receives or decodes a channel in a form that conforms to the "assumption" under the premise that the channel is transmitted in accordance with the "assumption".

[0049] In the present disclosure, a user equipment (UE) may be fixed or mobile. Each of the various devices that transmit and / or receive user data and / or control information by communicating with a base station (BS) may be a UE. The term UE may be referred to as a terminal device, a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, a personal digital assistant (PDA), a wireless modem, a handheld device, etc. In the present disclosure, a BS refers to a fixed station that communicates with a UE and / or another BS and exchanges data and control information with the UE and another BS. The term BS may be referred to as an advanced base station (ABS), a node B (NB), an evolved node B (eNB), a base transceiver system (BTS), an access point (AP), a processing server (PS), etc. Specifically, a BS of a universal terrestrial radio access (UTRAN) is referred to as an NB, a BS of an evolved UTRAN (E-UTRAN) is referred to as an eNB, and a BS of a new radio access technology network is referred to as a gNB. In the following, for the convenience of description, NB, eNB or gNB will be referred to as a BS regardless of the type or version of the communication technology.

[0050] In the present disclosure, a node refers to a fixed point that can send / receive a radio signal to / from a UE by communicating with the UE. Regardless of its name, various types of BSs can be used as nodes. For example, a BS, NB, eNB, picocell eNB (PeNB), home eNB (HeNB), repeater, transponder, etc. can be a node. In addition, a node may not be a BS. For example, a radio remote head (RRH) or a radio remote unit (RRU) can be a node. Typically, RRH and RRU have a power level lower than that of the BS. Since the RRH or RRU (hereinafter, RRH / RRU) is usually connected to the BS via a dedicated line such as an optical cable, the collaborative communication according to the RRH / RRU and the BS can be smoothly performed compared to the collaborative communication according to the BS connected via a wireless link. At least one antenna is installed per node. The antenna may refer to a physical antenna port or to a virtual antenna or an antenna group. A node may also be referred to as a point.

[0051] In the present disclosure, a cell refers to a specific geographical area where one or more nodes provide communication services. Therefore, in the present disclosure, communication with a specific cell may mean communication with a BS or node that provides communication services to a specific cell. The DL / UL signal of a specific cell refers to the DL / UL signal from / to the BS or node that provides communication services to the specific cell. A cell that provides UL / DL communication services to a UE is particularly referred to as a service cell. In addition, the channel state / quality of a specific cell refers to the channel state / quality of a channel or communication link generated between a BS or node that provides communication services to a specific cell and the UE. In a 3GPP-based communication system, a UE can use a CRS sent on a cell-specific reference signal (CRS) resource and / or a CSI-RS sent on a channel state information reference signal (CSI-RS) resource (allocated to a specific node by an antenna port of a specific node) to measure the DL channel state from a specific node.

[0052] The 3GPP-based communication system uses the concept of a cell in order to manage radio resources, and distinguishes a cell related to radio resources from a cell of a geographical area.

[0053] A "cell" of a geographic area may be understood as a coverage area in which a node can use a carrier to provide services, and a "cell" of radio resources is associated with a bandwidth (BW) which is a frequency range configured by a carrier. Since the DL coverage (the range in which a node can send a valid signal) and the UL coverage (the range in which a node can receive a valid signal from a UE) depend on the carrier that carries the signal, the coverage of a node may also be associated with the coverage of a "cell" of radio resources used by the node. Therefore, the term "cell" may be used to indicate the service coverage of a node at times, to indicate a radio resource at other times, or to indicate a range that a signal using a radio resource can reach with effective strength at other times.

[0054] In the 3GPP communication standard, the concept of a cell is used to manage radio resources. A "cell" associated with a radio resource is defined by a combination of DL resources and UL resources (i.e., a combination of DL component carriers (CCs) and UL CCs). A cell may be configured only by DL resources, or by a combination of DL resources and UL resources. If carrier aggregation is supported, the link between the carrier frequency of a DL resource (or DL ​​CC) and the carrier frequency of a UL resource (or UL CC) may be indicated by system information. For example, the combination of DL resources and UL resources may be indicated by a system information block type 2 (SIB2) link. In this case, the carrier frequency may be equal to or different from the center frequency of each cell or CC. When carrier aggregation (CA) is configured, the UE has only one radio resource control (RRC) connection with the network. During RRC connection establishment / reestablishment / handover, one serving cell provides non-access layer (NAS) mobility information. During RRC connection reestablishment / handover, one serving cell provides security input. The cell is called a primary cell (Pcell). Pcell refers to a cell operating on the primary frequency where the UE performs an initial connection establishment process or initiates a connection reestablishment process. According to the UE capabilities, the secondary cell (Scell) can be configured to form a set of serving cells together with the Pcell. The Scell ​​can be configured after the RRC connection establishment is completed and is used to provide additional radio resources in addition to the resources of the specific cell (SpCell). The carrier corresponding to the Pcell on the DL is called the downlink primary CC (DL PCC), and the carrier corresponding to the Pcell on the UL is called the uplink primary CC (DL PCC). The carrier corresponding to the Scell ​​on the DL is called the downlink secondary CC (DL SCC), and the carrier corresponding to the Scell ​​on the UL is called the uplink secondary CC (UL SCC).

[0055] In a wireless communication system, a UE receives information from a BS on DL, and a UE transmits information to a BS on UL. The information transmitted and / or received by the BS and the UE includes data and various control information, and there are various physical channels according to the type / purpose of the information transmitted and / or received by the UE and the BS.

[0056] The communication standards based on 3GPP define DL physical channels corresponding to resource elements carrying information from high layers and DL physical signals corresponding to resource elements used by the physical layer but not carrying information from high layers. For example, physical downlink shared channel (PDSCH), physical broadcast channel (PBCH), physical multicast channel (PMCH), physical control format indicator channel (PCFICH), physical downlink control channel (PDCCH), etc. are defined as DL physical channels, and reference signals (RS) and synchronization signals (SS) are defined as DL physical signals. RS (also called pilot) represents a signal with a predefined special waveform known to both BS and UE. For example, demodulation reference signal (DMRS), channel state information RS (CSI-RS), etc. are defined as DL RS. The communication standards based on 3GPP define UL physical channels corresponding to resource elements carrying information from high layers and UL physical signals corresponding to resource elements used by the physical layer but not carrying information from high layers. For example, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH) are defined as UL physical channels, and a DMRS for UL control / data signals, a sounding reference signal (SRS) for UL channel measurement, etc. are defined.

[0057] In the present disclosure, PDCCH refers to a set of time-frequency resources (e.g., resource elements) carrying downlink control information (DCI), and PDSCH refers to a set of time-frequency resources carrying DL data. PUCCH, PUSCH, and PRACH refer to a set of time-frequency resources carrying UCI, a set of time-frequency resources carrying UL data, and a set of time-frequency resources carrying random access signals, respectively. In the following description, "UE sends / receives PUCCH / PUSCH / PRACH" is used as the same meaning as the UE sends / receives UCI / UL data / random access signals on or through PUSCH / PUCCH / PRACH, respectively. In addition, "BS sends / receives PBCH / PDCCH / PDSCH" is used as the same meaning as the BS sends broadcast information / DL data / DCI on or through PBCH / PDCCH / PDSCH, respectively.

[0058] As more and more communication devices require greater communication capacity, eMBB communication relative to traditional radio access technology (RAT) is needed. In addition, large-scale MTC, which provides various services anytime and anywhere by connecting multiple devices and objects to each other, is a major issue to be considered in the next generation of communications. In addition, the design of communication systems that take into account services / UEs that are sensitive to reliability and delay is also being discussed. Considering eMBB communication, large-scale MTC, ultra-reliable low-latency communication (URLLC), etc., the introduction of the next generation RAT is being discussed. Currently, in 3GPP, research on the next generation mobile communication system after EPC is underway. In this disclosure, for convenience, the corresponding technology is referred to as a new RAT (NR) or a fifth generation (5G) RAT, and a system using NR or supporting NR is referred to as an NR system.

[0059] Figure 1 The structure of the LTE system is illustrated. This may also be referred to as an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) or an LTE / LTE-A system.

[0060] Reference Figure 1 , the E-UTRAN includes an evolved Node B (BS) 20 that provides a control plane and a user plane for the UE 10 .

[0061] The BSs 20 may be connected to each other via an X2 interface. The BSs 20 are connected to an Evolved Packet Core (EPC) 39 via an S1 interface. More specifically, the BSs 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.

[0062] 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.

[0063] 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 BS.

[0064] Figure 2The structure of the NR system is illustrated.

[0065] Reference Figure 2 , the next generation radio access network (NG-RAN) may include a next generation Node B (gNB) and / or eNB. The gNB and the eNB are connected to each other via an Xn interface. The gNB and the eNB are connected to the 5G core network (5GC) via an NG interface. More specifically, the gNB and the eNB are connected to the access and mobility management function (AMF) via the NG-C interface, and to the user plane function (UPF) via the NG-U interface.

[0066] Figure 3 An example of a frame structure available in a wireless communication system based on the 3rd Generation Partnership Project (3GPP) is shown.

[0067] Figure 3 The frame structure is only exemplary, and the number of subframes, the number of time slots, and the number of symbols in the frame may be changed differently. In the NR system, different OFDM parameter sets (e.g., subcarrier spacing (SCS)) may be configured for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of time resources including the same number of symbols (e.g., subframes, time slots, or transmission time intervals (TTIs)) may be configured differently for the aggregated cells. Here, the symbol may include an OFDM symbol (or a cyclic prefix-OFDM (CP-OFDM) symbol) and an SC-FDMA symbol (or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol). In the present disclosure, symbols, OFDM-based symbols, OFDM symbols, CP-OFDM symbols, and DFT-s-OFDM symbols may be used interchangeably.

[0068] Reference Figure 3 In the NR system, UL transmission and DL transmission are organized into frames. Each frame has T f =(△f max *N f / 100)*T c = 10 ms duration and is divided into two half frames of 5 ms each. The basic time unit of NR is T c =1 / (△f max *N f ), where △f max =480*10 3 Hz and N f =4096. For reference, the basic time unit of LTE is T s =1 / (△f ref *N f,ref ), where △f ref =15*10 3 Hz and Nf,ref =2048. c and T f With constant κ = T c / T f =64. Each half frame includes 5 subframes, and the duration of a single subframe is T sf The subframe is further divided into slots, and the number of slots in a subframe depends on the subcarrier spacing. Each slot includes 14 or 12 OFDM symbols based on the cyclic prefix. In normal CP, each slot includes 14 OFDM symbols, and in extended CP, each slot includes 12 OFDM symbols. The parameter set depends on the exponentially scalable subcarrier spacing △f=2 u *15kHz. The following table shows the number of OFDM symbols per time slot (N slot symb ), the number of time slots per frame (N frame,u slot ) and the number of time slots per subframe (N subframe,u slot ).

[0069] [Table 1]

[0070] u <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 0 14 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16

[0071] The following table shows the subcarrier spacing △f = 2 u *15kHz, number of OFDM symbols per slot, number of slots per frame and number of slots per subframe.

[0072] [Table 2]

[0073] u <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 2 12 40 4

[0074] NR frequency bands are defined as two types of frequency ranges, namely, FR1 and FR2. FR2 is also known as millimeter wave (mmW). The following table shows the frequency ranges in which NR can operate.

[0075] [Table 3]

[0076] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410MHz-7125MHz 15kHz, 30kHz, 60kHz FR2 24250MHz-52600MHz 60kHz, 120kHz, 240kHz

[0077] Figure 4 A resource grid showing time slots.

[0078] A slot includes multiple (e.g., 14 or 12) symbols in the time domain. For each parameter set (e.g., subcarrier spacing) and carrier, a common resource block (CRB) N indicated by higher layer signaling (e.g., RRC signaling) is allocated. start,u grid Begins to define N size,u grid,x *NRB sc subcarriers and N subframe,u symb OFDM symbol resource grid, where N size,u grid,x is the number of resource blocks (RBs) in the resource grid, and the subscript x is DL for the downlink and UL for the uplink. N RB sc is the number of subcarriers per RB. In 3GPP-based wireless communication systems, N RB sc Typically 12. For a given antenna port p, subcarrier spacing configuration u, and transmission link (DL or UL), there is one resource grid. The carrier bandwidth N for subcarrier spacing configuration u is given to the UE through higher-layer parameters (e.g., RRC parameters) size,u grid . Each element in the resource grid for antenna port p and subcarrier spacing configuration u is called a resource element (RE), and one complex symbol can be mapped to each RE. Each RE in the resource grid is uniquely identified by an index k in the frequency domain and an index l representing the symbol position relative to a reference point in the time domain. In the NR system, an RB is defined by 12 consecutive subcarriers in the frequency domain. In the NR system, RBs are classified into CRBs and physical resource blocks (PRBs). For subcarrier spacing configuration u, CRBs are numbered from 0 upwards in the frequency domain. The center of subcarrier 0 of CRB 0 of subcarrier spacing configuration u is equal to "point A" used as a common reference point for the RB grid. PRBs for subcarrier spacing configuration u are defined within a bandwidth part (BWP) and are numbered from 0 to N. size,u BWP,i -1 numbering, where i is the number of BWPs. PRB n in BWP i PRB With CRBn u CRB The relationship between n u PRB =n u CRB +N size,u BWP,i Given, where N size BWP,i is the CRB at which the BWP starts relative to CRB 0. A BWP includes multiple consecutive RBs in the frequency domain. For example, a BWP may be a CRB with a given parameter set u in BWP i on a given carrier. i A subset of contiguous CRBs defined by the UE. A carrier may include up to N (e.g., 5) BWPs. A UE may be configured with one or more BWPs on a given component carrier. Data communication is performed through enabled BWPs, and only a predetermined number of BWPs (e.g., one BWP) among the BWPs configured for the UE may be active on the component carrier.

[0079] Figure 5 A time slot structure used in a 3GPP-based system is shown.

[0080] In all 3GPP-based systems (e.g., in NR systems), each time slot may have a self-contained structure that includes i) a DL control channel, ii) DL or UL data, and / or iii) a UL control channel. For example, the first N symbols in a time slot may be used to send a DL control channel (hereinafter, a DL control region), and the last M symbols in a time slot may be used to send a UL control channel (hereinafter, a UL control region), where N and M are integers other than negative numbers. The resource region (hereinafter, a data region) between the DL control region and the UL control region may be used to send DL data or UL data. The symbols in a single time slot may be divided into groups of consecutive symbols that may be used as DL symbols, UL symbols, or flexible symbols. Hereinafter, information indicating how each symbol in a time slot is used will be referred to as a time slot format. For example, a time slot format may define which symbols in a time slot are used for UL and which symbols in a time slot are used for DL.

[0081] When the BS is intended to operate the serving cell in time division duplex (TDD) mode, the BS may configure UL and DL allocation patterns for the serving cell through high-layer (e.g., RRC) signaling. For example, the following parameters may be used to configure the TDD DL-UL pattern:

[0082] -dl-UL-TransmissionPeriodicity, which provides the periodicity of the DL-UL pattern;

[0083] -nrofDownlinkSlots, which provides the number of consecutive full DL slots at the beginning of each DL-UL pattern, where a full DL slot is a slot with only DL symbols;

[0084] -nrofDownlinkSymbols which provides the number of consecutive DL symbols at the beginning of the slot immediately following the last full DL slot;

[0085] -nrofUplinkSlots which provides the number of consecutive full UL slots at the end of each DL-UL pattern, where a full UL slot is a slot with only UL symbols; and

[0086] -nrofUplinkSymbols which provides the number of consecutive UL symbols at the end of the slot immediately preceding the first full UL slot.

[0087] The remaining symbols that are not configured as DL symbols or UL symbols among the symbols in the DL-UL pattern are flexible symbols.

[0088] If the configuration of the TDD DL-UL pattern, ie, TDD UL-DL configuration (eg, tdd-UL-DL-ConfigurationCommon or tdd-UL-DLConfigurationDedicated) is provided to the UE through higher layer signaling, the UE sets a slot format per slot over a plurality of slots based on the configuration.

[0089] Figure 6 A diagram for explaining physical channels available in a 3GPP-based wireless communication system and a signal transmission method using the channels.

[0090] Reference Figure 6 In step S101, a UE that is turned on again after being turned off or a UE that enters a new cell performs an initial cell search, such as synchronization with a BS. For the initial cell search, the UE receives a synchronization signal block (SSB) from the BS. The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). The UE establishes synchronization with the BS based on the PSS / SSS and obtains information such as a cell identity (ID). The UE can obtain broadcast information in the cell based on the PBCH. The UE can receive a DL reference signal (RS) during the initial cell search to monitor the DL channel status.

[0091] After completing the initial cell search, the UE may receive a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) based on information in the PDCCH to obtain more detailed system information (S12).

[0092] Subsequently, in order to complete the connection with the BS, the UE may perform a random access procedure (S13 to S16). In the random access procedure, for example, the UE may send a preamble on the PRACH (S13) and receive a PDCCH and a random access response (RAR) to the preamble on the PDSCH corresponding to the PDCCH (S14). The UE may send a physical uplink shared channel (PUSCH) based on the scheduling information in the RAR (S15), and perform a contention resolution procedure, such as receiving a PDCCH signal and a PDSCH channel signal related thereto (S16).

[0093] On the other hand, in the case of a random access procedure performed in two steps (2-step RACH or type 2 random access procedure) in addition to a random access procedure performed in four steps (4-step RACH or type 1 random access procedure), S13 / S15 may be performed as one operation in which the UE performs sending (e.g., an operation of sending message A including a PRACH preamble and / or PUSCH), and S14 / S16 may be performed as one operation in which the BS performs sending (e.g., an operation of sending message B including RAR and / or contention resolution information).

[0094] After performing the above process, the UE may perform a general UL / DL signal transmission process including receiving a PDCCH signal and / or a PDSCH signal ( S17 ) and transmitting a PUSCH signal and / or a physical uplink control channel (PUCCH) signal ( S18 ).

[0095] 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 acknowledgement (HARQ-ACK / NACK), scheduling request (SR), channel quality indicator (CQI), precoding matrix index (PMI), rank indicator (RI), etc.

[0096] 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.

[0097] Figure 7 An exemplary flow of a method for performing cross-link interference (CLI) measurement is shown.

[0098] Reference Figure 7 , the UE receives a measurement configuration for CLI measurement from the BS (710). The measurement configuration may include measObject, reportConfig, measID, quantityConfig, etc. The UE performs measurement based on the received measurement configuration (720). Based on satisfying the reporting condition, the UE prepares to report a measurement result including a measurement value (730). Depending on the reporting condition, the measurement report may be periodic or event-based. The measurement result is sent to the BS. Thereafter, the UE may perform an operation for handover or resource reconfiguration based on the RRC reconfiguration message received from the BS.

[0099] Figure 8 is a diagram for explaining a method for performing full-duplex operation in an NR system.

[0100] 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.

[0101] 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).

[0102] 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.

[0103] 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.

[0104] Specifically, refer to Fig. 9 , the time resources may include time resources for half-duplex (HD) operation and time resources for full-duplex (FD) operation (eg, SB-FD or SS-FD). Fig. 9 As shown in (a) of FIG. 1 , the time resources may include time resources for SB-FD operation and remaining time resources for HD operation. Fig. 9 As shown in (b), the time resources may include time resources for SS-FD operation and the remaining time resources for HD operation. In this case, the unit of the time resources (for SB-FD operation, SS-FD operation, or HD operation) may be a time slot or symbol unit. For the time resources in SB-FD operation, some frequency resources may be used as DL resources and some frequency resources may be used as UL resources.

[0105] 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.

[0106] In the case of full-duplex (hereinafter, FD) operation as described above, FD operation can be performed from the perspective of both the BS and the UE. For example, both the BS and the 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 BS can perform FD operation (in the same time resource), and the UE can perform HD operation. The BS can simultaneously perform DL and UL transmission and reception by using the same or different frequency resources in the same time resource, but the UE can only perform DL reception or UL transmission in a specific time resource. In this case, the BS can perform FD operation in a manner that performs DL transmission and UL reception for different UEs at the same time (or, the same time resource).

[0107] The content described below is generally explained assuming that the BS performs FD operation and the UE performs HD operation, but can also be applied to the case where both the BS and the UE perform FD operation.Based on the above discussion, a method of configuring BWP resources for intra-carrier FD operation is described in detail below.

[0108] Fig. 9 and Fig.10 is a diagram for explaining sub-band full-duplex (SBFD) and single-frequency full-duplex (SFFD) operations.

[0109] 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 in which the BS simultaneously transmits and receives DL and UL (or transmits DL and receives UL) at the same frequency, and the other is FDR in which the BS simultaneously transmits and receives DL and UL (or transmits DL and receives UL) at different frequencies. Here, different frequencies mean 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 BS performs transmission and reception simultaneously.

[0110] When operating the FDR, the BS 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 mode can be considered based on the following example operation.

[0111] 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.

[0112] 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.

[0113] In the above case, SBFD (or SFFD) and dynamic / flexible TDD (hereinafter, d / f TDD) may be considered. In addition, TDD configurations between cells or BSs may be different. With respect to these two environments, the similarities and differences in CLI are described below.

[0114] (1) In terms of measurement resources

[0115] 1) For d / f TDD

[0116] -Interference source (aggressor): UE between cells

[0117] -HD time slots only

[0118] 2) For SBFD

[0119] -Interference sources: UEs within a cell and UEs between cells

[0120] -HD time slot and SBFD time slot

[0121] --If the BWP of the SBFD slot is similar to the HD BWP: Same as the HD slot

[0122] --If the BWP of the SBFD slot is different from the HD BWP: e.g., measurements outside the active BWP, DL / UL sub-band

[0123] Until Rel-17, the existing cross-link interference (CLI) measurement can measure RSRP in the SRS resource according to the existing scenario, and RSSI measurement can be performed on the CLI-RSSI resource. The SRS resource used for CLI has 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 for the CLI until Rel-17, the following configuration is possible. The method of configuring CLI-related resources can be briefly summarized as follows (see TS 38.331).

[0124] (1) Measurement resources

[0125] >SRS-Resource

[0126] - The DLBWP id can be indicated to derive the reference point of the SRS resource. In CLI measurements, there is a feature to link resources (particularly DL) to the BWP.

[0127] - For CLI SRS-RSRP measurements

[0128] -- Resource Type: Periodic Type Only (Resource Type = Periodic)

[0129] --Periodicity: Time slots 1280, 2560 can be configured (time slot level, 1 to maximum 640)

[0130] --Number of symbols, repetition factor: n1

[0131] --Frequency hopping: b-hop (symbol level hopping) -> b-SRS (BW of SRS) -> frequency position index is constant (unless reconfigured)

[0132] --Sequence jump, ptrs port, spatial relationship information->disable

[0133] --SRS Port 1

[0134] >CLI-RSSI-Resource

[0135] -Minimum RB 4, within active DL BW

[0136] --Configured to a minimum value of 4 to eliminate ambiguity when introducing reference SCS (15 to 120 SCS)

[0137] -Symbols within slot boundaries (relative to the reference SCS)

[0138] -UE performs CLI-RSSI measurements using the SCS of the active BWP (regardless of the reference SCS)

[0139] - Periodicity, offset: time slot level (1 to maximum 640)

[0140] - QCL-D with the latest received PDSCH and the latest monitored CORESET

[0141] (2) Measurement / report trigger

[0142] >SRS-RSRP, CLI-RSSI

[0143] >Event triggered or periodic

[0144] -i1-event: Interference exceeds absolute threshold

[0145] - Reporting interval: 120ms to 30min

[0146] For resources configured according to the above "(1)" and "(2)", the UE may perform CLI measurements, and when the interference measured on the above configured resources exceeds the absolute threshold (i1-threshold), the UE may perform (periodic) measurements on the configured resources and report the value of the measured interference 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. In detail, event-triggered reporting and periodic reporting may be configured as shown in Tables 4 and 5 below (see 3GPP TS 38.331).

[0147] [Table 4]

[0148]

[0149] [Table 5]

[0150]

[0151] In addition, the existing CLI measurement / reporting before Rel-17 is triggered by an event (for example, when the RSSI exceeds a certain threshold) or is performed periodically (120ms to 30 minutes). The CLI-RSSI resource is used to measure and report RSSI, or the SRS is used to measure or report RSRP. However, considering dynamic / flexible TDD (d / f TDD) or SBFD, the current dynamics are insufficient. In particular, in the case of SBFD, the attacker may be an intra-cell UE (in the SBFD timeslot), so it is expected that the BS can quickly obtain the CLI information and further reflect the CLI information in the scheduler. Here, the SBFD timeslot refers to the time period when the UE operates in HD mode but the BS performs both transmission and reception at the same time. The reason for not using the existing d / f TDD is that coordination between BSs is difficult, so enhanced coordination may be required to use the existing d / f TDD. In these cases, CLI measurement / avoidance between BSs may be necessary.

[0152] The present disclosure proposes a method and / or process for exchanging beam information between BSs for CLI measurement / avoidance. For example, a method and / or process for sending beam information that the BS is expected to operate in a specific time domain to another BS is proposed.

[0153] For CLI measurement or avoidance between BSs (e.g., gNBs), it may be considered to exchange the spatial configuration information of the BS together with or separately from the expected TDD DL-UL configuration in NR through the Xn Application Protocol (XnAP), etc., for exchanging TDD configuration information between BSs. The details will be described. The spatial configuration information of the BS described below refers to information about the beam that the BS is expected to operate at a given time. Although the spatial configuration information may be referred to as the expected spatial configuration, for convenience of description, it is referred to as the beam information of the BS or the beam of the BS. However, this may be different from the actual beam operation of the BS.

[0154] The expected TDD DL-UL configuration described in 3GPP TS 38.423 is shown below.

[0155] [Table 6]

[0156]

[0157] Fig.11 An exemplary process of a communication method performed by a network node according to some implementations of the present disclosure is shown.

[0158] Reference Fig.11, the network node may send first expected TDD configuration information about a time periodicity period to a neighboring network node, the time periodicity period including one or more downlink time periods and one or more uplink time periods to which TDD is applied (S1101). Next, the network node may receive second expected TDD configuration information including second beam information from the neighboring network node (S1102). In this case, the first expected TDD configuration information may include first beam information about a first time period within the time periodicity period.

[0159] Additionally, the method may further include configuring a beam direction for communicating with the UE based on the first expected TDD configuration information and the second beam information.

[0160] Here, the expected TDD configuration refers to a planned / expected TDD configuration to be configured for the UE, which may be fully reflected in the actual TDD configuration or involve a change of usage (DL / UL) within some period of time.

[0161] According to some implementations of the present disclosure, beam information for exchanging information about transmit and receive beams between BSs generally needs to be indicated together with time domain information. In this case, the indication method may be considered to be based on the expected TDD DL-UL configuration, that is, based on the SCS, CP and periodicity configured in the expected TDD DL-UL configuration at the time slot level or symbol level.

[0162] Method for representing BS beam information

[0163] For a method of expressing BS beam information for exchanging information about transmission and reception beams between BSs, the following options may be considered.

[0164] Option 1) Based on beam association: Information about the transmission (and / or reception) beam of the BS may be indicated based on beam association information such as TCI status. For example, if the beam used by the BS in a specific time period (e.g., time slot index X) is the same as the beam used by the BS in another specific time period (e.g., at time slot index Y), or if the beam used at time slot index X includes the beam used at time slot index Y, the information may be indicated based on association.

[0165] Option 2) Logical beam index: Information about the transmission (and / or reception) beam of the BS can be indicated based on the logical beam index. The difference between Option 1 and Option 2 is that, for beam association information, Option 1 can indicate the inclusion relationship or hierarchical relationship between beams, while in Option 2, the inclusion relationship between beams based on the hierarchy cannot be indicated. In other words, from the perspective of the BS receiving the information, it can only be determined based on the logical index whether the BS uses the same beam or different beams at different times in the time domain. However, the signaling is simpler than Option 1.

[0166] Option 3) Direction Information: To indicate information about the actual beam direction, it may be considered to indicate the beam based on the direction of the beam and / or the width of the beam (e.g., 3dB bandwidth). To this end, the beam may be based on an absolute direction, based on globally applicable coordinates. It may be considered to indicate the beam so that the actual direction of the beam can be inferred based on the transmit receive point (TRP) number / ID or sector number / ID and the relative direction.

[0167] Option 4) TRP Sector ID: For even simpler indication, one may consider only indicating whether a specific TRP is enabled at a specific point in time.

[0168] In order to indicate the beam of the BS, it is possible to consider indicating only the DL transmission (Tx) beam of the BS based on the above method and / or process. Alternatively, it is possible to consider indicating both the DL Tx beam and the UL receive (Rx) beam. Indicating only the DL Tx beam is beneficial for identifying potential attackers, while indicating both the DL Tx beam and the UL Rx beam is beneficial for identifying not only potential attackers but also potential victims. In this case, when only the Tx beam is indicated, that is, when only the DL Tx beam is indicated, the beam indication information may not specify whether it is DL or UL. When the UL Rx beam is also indicated, that is, when both the DL Tx beam and the UL Rx beam are indicated, the link direction (DL or UL) also needs to be indicated. In this case, when the expected TDD DL-UL configuration is exchanged between BSs via XnAP, it can be implicitly determined whether it is DL or UL without explicit indication.

[0169] When information about a beam of a BS is indicated according to the above-mentioned method and / or process, it may be considered to indicate information associated with the following items or information about some items.

[0170] Time domain information

[0171] Option 1) may consider always indicating / exchanging information about the beam of the BS in a periodic manner.

[0172] The periodicity may refer to the periodicity used in the intended TDD DL UL configuration.

[0173] Option 2) may consider indicating / exchanging information about the BS's beams during a portion of the periodicity.

[0174] For the DL Tx beam of the BS, a portion of time within the periodicity may refer to: the time when the BS is expected to be the aggressor. For example, since the TDD configuration is usually arranged based on downlink-flexible-uplink, a portion of time may mean all or some of the time when DL transmission is performed within the periodicity, such as the first few time slots or symbols within the periodicity. Alternatively, a portion of time may refer to the time when the specific signal / channel sent is sent by the BS, that is, the time when the cell-specific or UE group common signal / channel is sent to the UE. For example, a portion of time may refer to the time when the BS is expected to send SSB / PBCH blocks, CSI-RS, type0-PDCCH and / or a specific CORESET, and it can be considered that the BS exchanges beam information via XnAP during the time when the specific signal / channel is expected to be sent.

[0175] For the UL Rx beam of the BS, a portion of time within the periodicity may refer to: the time when the BS needs to always receive. That is, a portion of time refers to the time when the BS may potentially become a victim. For example, since the TDD configuration is usually arranged as a downlink-flexible-uplink, a portion of time may mean all or some of the time when the BS performs UL reception, such as the last few time slots or symbols within the periodicity. Alternatively, a portion of time may refer to the time when a specific signal / channel is expected to be received by the BS, that is, the time when a cell-specific or UE group common signal / channel is expected to be sent by the UE. For example, a portion of time may refer to the time when the BS expects to receive RACH from the UE (for example, the time when the BS expects to receive RACH from the UE based on SSB to RO (RACH timing) mapping). It can be considered that the BS exchanges beam information via XnAP during the time when a specific signal / channel is expected to be received.

[0176] Option 3) may consider indicating / exchanging information about the beams of the BS within a specific time period.

[0177] Here, the specific time period may refer to the following. It may be considered that the BS exchanges beam information only during the time when the BS may have a different link direction (DL or UL) from a neighboring BS in the network. The time when the BS may have a different link direction (DL or UL) from another BS may refer to a specific time slot and / or symbol specified by a prior agreement or arrangement within a periodicity. Alternatively, the time may refer to the time when the BS indicates a flexible change of DL or UL (for example, the time when the BS indicates flexible resources to the UE served by the BS via a TDD UL-DL configuration such as tdd-UL-DL-ConfigurationCommon and / or tdd-UL-DLConfigurationDedicated). Alternatively, the time may refer to the time when the BS operates or is expected to operate with SBFD, that is, the time when the BS expects to perform both DL and UL simultaneously on the same or different frequencies. The time resources that the BS expects to operate with SBFD or another BS expects to operate with SBFD may be some time periods within the periodicity, specified by a prior agreement or arrangement. Alternatively, the time resources may refer to time resources that the BS explicitly and / or implicitly indicates to the UE served by the BS via RRC / MAC-CE / DCI, etc. as SBFD time slots.

[0178] Frequency domain information

[0179] Option 1) may consider indicating a single beam for the entire frequency band in which the BS operates.

[0180] In these cases, the beam may not be associated with information in the frequency domain, or the BS may indicate the frequency domain for the entire frequency band in which the BS operates.

[0181] Option 2) may consider indicating multiple beams for the entire frequency band in which the BS operates.

[0182] That is, it may be indicated that different beams are transmitted and received at a specific frequency granularity. The frequency granularity may be used to indicate the beam of the BS for a specific frequency band unit based on an absolute radio frequency channel number (ARFCN). Alternatively, the frequency domain granularity may be represented at an RB level or an RB group level in a frequency band in which the BS operates, and the beam of the BS may be indicated for the frequency band.

[0183] Option 3) may consider indicating a single beam only for some frequency bands operated by the BS.

[0184] This may be particularly useful when there is a BS operating SBFD in the network or when it is expected that there will be a BS operating SBFD in the network. For a BS operating SBFD, a specific frequency band within the entire frequency band operated by the BS is used for DL, while other frequency bands are used for UL. Therefore, when indicating a DL Tx beam, the method using option 1 or option 2 may result in ambiguous signaling, because it may be signaled as if the beam is used in a frequency band that is not actually operated. Therefore, the BS may consider indicating a beam only for a specific frequency region within the frequency resources in which the BS operates SBFD or within the frequency resources in which the BS in the network is expected to operate SBFD, only for a specific frequency region based on ARFCN, or only for a specific frequency region based on RB. Such a specific frequency band may be determined by the BS based on a prior agreement or arrangement. Alternatively, it may be considered that the BS determines all or some cell-specific or UE group common frequency resources that DL and UL are expected to be performed simultaneously, which are indicated to the UE by the BS via RRC / MAC-CE / DCI.

[0185] By exchanging spatial configuration information between BSs according to the above methods and procedures, a BS can adjust the beam direction based on beam information received from another (neighboring) BS. Based on the adjustment of the beam direction, the BS can effectively perform CLI avoidance with respect to other (neighboring) BSs in the spatial domain.

[0186] A network node may perform operations according to some implementations of the present disclosure when performing wireless communications. The network node may include: at least one transceiver; at least one processor; and at least one computer memory, which is operatively connected to the at least one processor and stores instructions, which when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A processing device for a network node may include: at least one processor; and at least one computer memory, which is operatively connected to the at least one processor and stores instructions, which when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer-readable (non-volatile) storage medium may store at least one computer program including instructions, which when executed by at least one processor cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer program or computer program product may include instructions recorded on at least one computer-readable (non-volatile) storage medium, which when executed cause the at least one processor to perform operations according to some implementations of the present disclosure.

[0187] In a network node, a processing device, a computer-readable (non-volatile) storage medium, and / or a computer program product, the operations may include: sending first expected TDD configuration information about a time periodicity period to a neighboring network node, the time periodicity period including one or more DL time periods and one or more UL time periods to which TDD is applied; and receiving second expected TDD configuration information including second beam information from the neighboring network node. The first expected TDD configuration information may include first beam information about a first time period within the time periodicity period.

[0188] In some implementations of the present disclosure, the operation may further include configuring a beam direction for communication with the UE based on the first expected TDD configuration information and the second beam information.

[0189] In some implementations of the present disclosure, the first beam information may include a TCI state ID related to the first time period.

[0190] In some implementations of the present disclosure, the first beam information may include beam index information related to the first time period.

[0191] In some implementations of the present disclosure, the first beam information may include information about TRP IDs enabled within the first time period.

[0192] In some implementations of the present disclosure, the first time period may be a time period configured for the SBFD operation of the network node within a time periodic period.

[0193] In some implementations of the present disclosure, the first time period may be a second time period in one or more DL time periods for sending a cell-specific DL signal or a third time period in one or more UL time periods for receiving a cell-specific UL signal.

[0194] In some implementations of the present disclosure, the time periodic period may further include at least one flexible time period, and the first time period may be at least one flexible time period.

[0195] In some implementations of the present disclosure, the second time period may be at least one of a time period configured for transmission of SSB, a time period configured for transmission of CSI-RS, a time period configured for transmission of type0-PDCCH, or a time period in a specific CORESET. The third time period may be a time period configured for reception of RACH.

[0196] In some implementations of the present disclosure, based on the frequency band used for the first time period being divided into a first subband for DL ​​and a second subband for UL, the first beam information may include information about at least one of the beam direction for the first subband or the beam direction for the second subband.

[0197] According to some implementations of the present disclosure, CLI avoidance may be performed efficiently.

[0198] According to some implementations of the present disclosure, the time required for a BS to perform CLI measurements may be reduced.

[0199] According to some implementations of the present disclosure, beam information may be exchanged between BSs to adjust the beam direction.

[0200] Fig.12 An example of a communication system 1 to which an implementation of the present disclosure is applied is shown.

[0201] Reference Fig.12 , the communication system 1 applied to the present disclosure includes a wireless device, a BS, and a network. Here, the wireless device refers to a device that performs communication using a RAT (e.g., 5G NR or LTE (e.g., E-UTRA)), and may be referred to as a communication / radio / 5G device. The wireless device may include (but is not limited to) a robot 100a, a vehicle 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 vehicle-to-vehicle communication. Here, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device may include an augmented reality (AR) / virtual reality (VR) / mixed reality (MR) device, 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 signage, a vehicle, a robot, and the like. 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, BSs and networks may also be implemented as wireless devices, and a specific wireless device may operate as a BS / network node relative to another wireless device.

[0202] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. The AI ​​technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS / network. For example, vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0203] Wireless communication / connection 150a and 150b may be established between wireless devices 100a to 100f and BS200, and between wireless devices 100a to 100f. Here, wireless communication / connection such as UL / DL communication 150a and sidelink communication 150b (or device-to-device (D2D) communication) may be established through various RATs (e.g., 5G NR). The wireless device and the BS / wireless device may send / receive radio signals to / from each other through wireless communication / connection 150a and 150b. To this end, various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and at least a portion of a resource allocation process may be performed based on various proposals of the present disclosure.

[0204] Fig.13 is a block diagram illustrating an example of a communication device capable of executing the method according to the present disclosure.

[0205] Reference Fig.13 , the first wireless device 100 and the second wireless device 200 may transmit and / or receive radio signals through various RATs (e.g., LTE and NR). Here, {the first wireless device 100 and the second wireless device 200} may correspond to Fig.12 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0206] 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 functions, processes and / or methods described / proposed above. 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 execute part or all of the processes controlled by the processor 102 or store software codes including commands for executing the processes and / or methods described / proposed above. Here, 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.

[0207] For example, the processor 102 may send TDD configuration information through the transceiver 106. For example, the TDD configuration information may include expected TDD configuration information, and the expected TDD configuration information includes beam information about some time periods within a time periodicity period. The time periodicity period includes one or more DL time periods and one or more UL time periods to which TDD is applied.

[0208] For example, the processor 102 may receive TDD configuration information from the neighboring node through the transceiver 106. For example, the TDD configuration information may include expected TDD configuration information, and the expected TDD configuration information includes beam information about the neighboring node.

[0209] The operations of the processor 102 may be performed based on the methods and / or processes described in Option 1 to Option 3 above.

[0210] 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 functions, processes and / or methods described / proposed above. 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 execute part or all of the processes controlled by the processor 202 or store software codes including commands for executing the processes and / or methods described / proposed above. Here, 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.

[0211] For example, the processor 202 may send TDD configuration information through the transceiver 206. For example, the TDD configuration information may include expected TDD configuration information, and the expected TDD configuration information includes beam information about some time periods within a time periodicity period. The time periodicity period includes one or more DL time periods and one or more UL time periods to which TDD is applied.

[0212] For example, the processor 202 may receive TDD configuration information from the neighboring node through the transceiver 206. For example, the TDD configuration information may include expected TDD configuration information, and the expected TDD configuration information includes beam information about the neighboring node.

[0213] The operations of the processor 202 may be performed based on the methods and / or processes described in Option 1 to Option 3 above.

[0214] Hereinafter, 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 a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a service data adaptation protocol (SDAP) layer). 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 functions, procedures, proposals, and / or methods disclosed in the present disclosure. One or more processors 102 and 202 may generate messages, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in the present disclosure. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, an SDU, a message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in the present disclosure, 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 functions, procedures, proposals, and / or methods disclosed in the present disclosure.

[0215] 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 functions, processes, proposals, and / or methods disclosed in the present disclosure 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 perform the functions, processes, proposals, and / or methods disclosed in the present disclosure 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 functions, processes, proposals, and / or methods disclosed in the present disclosure may be implemented using firmware or software in the form of code, commands, and / or command sets.

[0216] 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, commands and / or instructions. 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.

[0217] 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 the present disclosure 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 function, process, proposal, method and / or operation flow chart disclosed in the present disclosure 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 radio signal 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 signal from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208. 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 functional, process, proposal, method and / or operation flow chart disclosed in the present disclosure through one or more antennas 108 and 208. In the present disclosure, 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.

[0218] Fig.14 Another example of a wireless device capable of performing implementations of the present disclosure is shown.

[0219] Reference Fig.14 , the wireless devices 100 and 200 may correspond to Fig.13 The wireless devices 100 and 200 of the present invention 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.13One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Fig.13 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.

[0220] 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.12 100a), vehicles ( Fig.12 100b-1 and 100b-2), XR devices ( Fig.12 100c), handheld device ( Fig.12 100d), household appliances ( Fig.12 100e), IoT devices ( Fig.12 100f), digital broadcast UE, holographic device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig.12 400), BS( Fig.12 200), network nodes, etc. The wireless device can be used in a mobile or fixed location depending on the usage / service.

[0221] exist Fig.14In 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. As 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-temporary memory and / or a combination thereof.

[0222] In the present disclosure, at least one memory (e.g., 104 or 204) may store instructions or programs, and these instructions or programs, when executed, may cause at least one processor operatively connected to the at least one memory to perform operations according to some embodiments or implementations of the present disclosure.

[0223] In the present disclosure, a computer-readable storage medium may store at least one instruction or program, and when the at least one instruction or program is executed by at least one processor, the at least one processor may cause the at least one processor to perform operations according to some embodiments or implementations of the present disclosure.

[0224] In the present disclosure, a processing device or apparatus may include at least one processor and at least one computer memory operatively connected to the at least one processor. The at least one computer memory may store instructions or programs, and these instructions or programs, when executed, may cause at least one processor operatively connected to the at least one memory to perform operations according to some embodiments or implementations of the present disclosure.

[0225] The communication device of the present disclosure includes: at least one processor; and at least one computer memory, which is operatively connected to the at least one processor and configured to store instructions, which when executed cause the at least one processor to perform operations according to examples of the present disclosure described later.

[0226] The examples of the present disclosure as described above have been presented to enable those of ordinary skill in the art to implement and practice the present disclosure. Although the present disclosure is described with reference to the examples, those skilled in the art may make various modifications and changes in the examples of the present disclosure. Therefore, the present disclosure is not intended to be limited to the examples set forth herein, but to conform to the widest scope consistent with the principles and features disclosed herein.

[0227] Industrial Applicability

[0228] Implementations of the present disclosure may be used in a BS, a UE, or other devices in a wireless communication system.

Claims

1. A method for performing communication between a network node and a neighboring network node in a wireless communication system, the method comprising the following steps: sending first expected time division duplex (TDD) configuration information about a time periodicity period to the neighboring network node, the time periodicity period including one or more downlink time periods and one or more uplink time periods in which TDD is applied; and receiving second expected TDD configuration information including second beam information from the neighboring network node, The first expected TDD configuration information includes first beam information about a first time period within the time periodicity period.

2. The method according to claim 1, further comprising the following steps: A beam direction for communication with a user equipment UE is configured based on the first expected TDD configuration information and the second beam information.

3. The method according to claim 1, wherein: The first beam information includes a transmission configuration indication TCI state identifier ID related to the first time period.

4. The method according to claim 1, wherein: The first beam information includes beam index information related to the first time period.

5. The method according to claim 1, wherein: The first beam information includes information about the transmitting and receiving point TRP identification ID enabled in the first time period.

6. The method according to claim 1, wherein: The first time period is a time period configured for a sub-band full-duplex (SBFD) operation of the network node within the time periodic period.

7. The method according to claim 1, wherein: The first time period is a second time period for sending a cell-specific downlink signal within the one or more downlink time periods or a third time period for receiving a cell-specific uplink signal within the one or more uplink time periods.

8. The method according to claim 1, wherein: The time periodicity period also includes at least one flexible time period, and The first time period is the at least one flexible time period.

9. The method according to claim 7, wherein: The second time period is at least one of a time period configured for transmission of a synchronization signal block SSB, a time period configured for transmission of a channel state information reference signal CSI-RS, a time period configured for transmission of a type 0 physical downlink control channel type0-PDCCH, or a time period in a specific control resource set CORESET, and The third time period is a time period configured for receiving a random access channel RACH.

10. The method according to claim 1, wherein: Based on that a frequency band for the first time period is divided into a first subband for downlink and a second subband for uplink, the first beam information includes information on at least one of a beam direction for the first subband or a beam direction for the second subband.

11. A processing device configured to control a network node, the processing device comprising: at least one processor; as well as at least one memory connected to the at least one processor and storing instructions that upon execution by the at least one processor cause the network node to: sending first expected time division duplex (TDD) configuration information about a time periodicity period to a neighboring network node, the time periodicity period including one or more downlink time periods and one or more uplink time periods in which TDD is applied; and receiving second expected TDD configuration information including second beam information from the neighboring network node, The first expected TDD configuration information includes first beam information about a first time period within the time periodicity period. 12 . A non-transitory computer-readable storage medium having recorded thereon instructions for executing the method according to claim 1 .

13. A network node configured to perform communication with a neighboring network node in a wireless communication system, the network node comprising: at least one transceiver; at least one processor; as well as at least one computer memory operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: controlling the at least one transceiver to send first expected time division duplex (TDD) configuration information about a time periodicity period to the neighboring network node, the time periodicity period including one or more downlink time periods and one or more uplink time periods in which TDD is applied; and receiving second expected TDD configuration information including second beam information from the neighboring network node, The first expected TDD configuration information includes first beam information about a first time period within the time periodicity period.

14. The network node according to claim 13, wherein: The operations also include configuring a beam direction for communication with a user equipment UE based on the first expected TDD configuration information and the second beam information.

15. The network node according to claim 13, wherein: The first beam information includes a transmission configuration indication TCI state identifier ID related to the first time period.

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