Method of operating a device in a wireless communication system and device using said method

Abstract

Provided is a method and device for operating an NCR in a wireless communication system. The NCR includes an NCR-MT and an NCR-Fwd. The NCR receives DCI from a base station via the NCR-MT and operates in an access link via the NCR-Fwd based on the DCI. The DCI includes a beam indication field used to indicate beam information and a time resource indication field used to indicate time resources, the number of beam indication fields and the number of time resource indication fields are the same, and the number of time resource indication fields is set by a higher layer signal.

Description

[Technical field]

[0001] The present disclosure relates to a method of operating an apparatus in a wireless communication system and an apparatus using said method [Background technology]

[0002] As more communication devices require larger communication capacity, there is an increasing need for improved mobile broadband communication compared to existing radio access technology (RAT). Massive Machine Type Communications (MTC), which connects multiple devices and things to provide various services anytime and anywhere, is also one of the major issues being considered in next-generation communication. In addition, communication system designs that take into account reliability and latency-sensitive services / terminals are being discussed. Thus, the introduction of next-generation wireless access technologies that take into account enhanced mobile broadband communication, massive MTC, URLLC (Ultra-Reliable and Low Latency Communication), etc. is being discussed, and for convenience in this disclosure, the relevant technologies are referred to as new RAT or NR.

[0003] Meanwhile, NR can introduce NCR (network-controlled repeater) including NCR-MT (mobile termination) and NCR-Fwd (forwarding). NCR-MT can receive control information from the base station and control the forwarding operation of NCR-Fwd.

[0004] The base station can provide control information for aperiodic access link beam direction of NCR-Fwd. In this case, the conventional technology does not provide a method for enabling dynamic beam direction to be flexibly performed without increasing signaling overhead. Summary of the Invention [Problem to be solved by the invention]

[0005] The technical problem that the present disclosure aims to solve is to provide a method for operating an apparatus in a wireless communication system and an apparatus using said method. [Means for solving the problem]

[0006] The present invention provides a method and apparatus for operating an NCR including an NCR-MT and an NCR-Fwd in a wireless communication system. The NCR receives downlink control information (DCI) from a base station via the NCR-MT and operates on an access link via the NCR-Fwd based on the DCI. At this time, the DCI is a L-channel used to indicate beam information. max beam direction fields and T used to indicate time resources max and a time resource indication field, max and the above T max are natural numbers and are the same as each other. max is set by a higher layer signal. Effect of the Invention

[0007] According to the present disclosure, it is possible to minimize an increase in the bit size of control information for controlling the operation of NCR-Fwd, and to efficiently control the operation of NCR-Fwd.

[0008] In addition, dynamic beam instruction for NCR-Fwd can be flexibly executed.

[0009] Furthermore, since the NCR-MT can know in advance the magnitude of the DCI that controls the NCR-Fwd, the detection of the DCI can be easily performed. [Brief description of the drawings]

[0010] [Figure 1] Figure 1 shows an example of the system structure of a New Generation Radio Access Network (NG-RAN) to which NR is applied.

[0011] [Diagram 2] FIG. 2 is a block diagram illustrating the radio protocol architecture for the user plane.

[0012] [Diagram 3] FIG. 3 is a block diagram illustrating the radio protocol architecture for the control plane.

[0013] [Figure 4] Figure 4 shows an example of functional division between NG-RAN and 5GC.

[0014] [Diagram 5] FIG. 5 shows an example of a frame structure that can be applied in NR.

[0015] [Figure 6] FIG. 6 illustrates a slot structure.

[0016] [Figure 7] FIG. 7 illustrates the core set.

[0017] [Figure 8] FIG. 8 shows an example of a frame structure for a new wireless access technology.

[0018] [Figure 9] FIG. 9 illustrates a self-contained slot structure.

[0019] [Figure 10] FIG. 10 illustrates physical channels and typical signal transmission.

[0020] [Figure 11] FIG. 11 illustrates a transport network architecture for 5G.

[0021] [Figure 12] FIG. 12 shows an example of a topology in which an NCR performs transmission and reception between a base station and a terminal.

[0022] [Figure 13] FIG. 13 is a diagram comparing the operation of NCR and existing RF repeaters.

[0023] [Figure 14] FIG. 14 illustrates links between base stations, NCRs, and terminals.

[0024] [Figure 15] FIG. 15 shows an example of a DCI field for an OFF indication combined with a beam indication (BEAM / OFF indication).

[0025] [Figure 16] FIG. 16 illustrates an operation method of NCR, including NCR-MT and NCR-Fwd, in a wireless communication system.

[0026] [Figure 17] FIG. 17 illustrates a signaling process between a base station, an NCR, and a terminal in a wireless communication system.

[0027] [Figure 18] FIG. 18 illustrates a wireless device to which the present disclosure can be applied.

[0028] [Figure 19] FIG. 19 shows an example of a signal processing module structure.

[0029] [Figure 20] FIG. 20 shows another example of a signal processing module structure.

[0030] [Figure 21] FIG. 21 illustrates an example of a wireless communication device according to an embodiment of the present disclosure.

[0031] [Figure 22] FIG. 22 illustrates another example of a wireless device.

[0032] [Figure 23] FIG. 23 shows another example of a wireless device to which the present specification is applied.

[0033] [Figure 24] FIG. 24 illustrates a communication system 1 to which the present specification is applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] In this specification, "A or B" may mean "A only," "B only," or "both A and B." In other words, in this specification, "A or B" may be interpreted as "A and / or B." For example, in this specification, "A, B or C" may mean "A only," "B only," "C only," or "any combination of A, B and C."

[0035] As used herein, a slash ( / ) or a comma may mean "and / or." For example, "A / B" may mean "A and / or B." Thus, "A / B" may mean "A only," "B only," or "both A and B." For example, "A, B, C" may mean "A, B, or C."

[0036] In this specification, "at least one of A and B" may mean "A only," "B only," or "both A and B." In addition, in this specification, the expressions "at least one of A or B" and "at least one of A and / or B" may be interpreted similarly to "at least one of A and B."

[0037] In addition, in this specification, "at least one of A, B and C" may mean "A only," "B only," "C only," or "any combination of A, B and C." Furthermore, "at least one of A, B or C" or "at least one of A, B and / or C" may mean "at least one of A, B and C."

[0038] In addition, parentheses used in this specification may mean "for example." Specifically, when "control information (PDCCH)" is displayed, "PDCCH" may be proposed as an example of "control information." In other words, "control information" in this specification is not limited to "PDCCH," and "PDCCH" may be proposed as an example of "control information." Also, when "control information (i.e., PDCCH)" is displayed, "PDCCH" may be proposed as an example of "control information."

[0039] Technical features described separately in one drawing in this specification may be realized separately or simultaneously.

[0040] A wireless communication system to which the present disclosure can be applied may also be referred to as, for example, an E-UTRAN (Evolved-UMTS Terrestrial Radio Access Network) or an LTE (Long Term Evolution) / LTE-A system.

[0041] E-UTRAN includes base stations (BS) that provide a control plane and a user plane for user equipment (UE). The terminal may be fixed or mobile and may be called by other terms such as mobile station (MS), user terminal (UT), subscriber station (SS), mobile terminal (MT), wireless device, terminal, etc. The base station refers to a fixed station that communicates with the terminal and may be called by other terms such as evolved-NodeB (eNB), base transceiver system (BTS), access point, etc.

[0042] The base stations may be connected to each other via an X2 interface. The base stations are connected to an Evolved Packet Core (EPC) via an S1 interface, more specifically, to a Mobility Management Entity (MME) via an S1-MME and to a Serving Gateway (S-GW) via an S1-U interface.

[0043] The EPC consists of the MME, S-GW, and P-GW (Packet Data Network-Gateway). The MME has information on the terminal's connection information and terminal capabilities, and such information is mainly used for terminal mobility management. The S-GW is a gateway with the E-UTRAN as a termination point, and the P-GW is a gateway with the PDN as a termination point.

[0044] Furthermore, as many communication devices require larger communication capacity, there is an increasing need for improved mobile broadband communication compared to existing radio access technology (RAT). In addition, massive machine type communications (MTC), which connects a large number of devices and objects to provide various services anytime and anywhere, is one of the main topics being considered in next-generation communications. In addition, communication system designs that take into account reliability and latency-sensitive services / terminals are being discussed. Thus, the introduction of next-generation wireless access technologies that take into account enhanced mobile broadband communication, massive MTC, and URLLC (Ultra-Reliable and Low Latency Communication) are being discussed, and for convenience in this disclosure, the relevant technologies are referred to as new radio access technology (new RAT, NR).

[0045] Figure 1 illustrates the system structure of a New Generation Radio Access Network (NG-RAN) to which NR is applied.

[0046] Referring to FIG. 1, the NG-RAN includes a gNB and / or an eNB that provides user plane and control plane protocol termination to a terminal. FIG. 1 illustrates a case where only a gNB is included. The gNBs (eNBs) are connected to each other via an Xn interface. The gNBs and eNBs are connected to a 5th generation core network (5G Core Network: 5GC) via an NG interface. More specifically, they are connected to an access and mobility management function (AMF) via an NG-C interface and to a user plane function (UPF) via an NG-U interface.

[0047] Meanwhile, the radio interface protocol layers between a terminal and a network can be divided into L1 (first layer), L2 (second layer), and L3 (third layer) based on the three lowest layers of the Open System Interconnection (OSI) reference model widely known in communication systems, of which the physical layer belonging to the first layer provides an information transfer service using a physical channel, and the Radio Resource Control (RRC) layer located in the third layer plays a role in controlling radio resources between the terminal and the network. For this purpose, the RRC layer exchanges RRC messages between the terminal and the base station.

[0048] Figure 2 is a block diagram showing a radio protocol architecture for the user plane. Figure 3 is a block diagram showing a radio protocol architecture for the control plane. The user plane is a protocol stack for user data transmission, and the control plane is a protocol stack for control signal transmission.

[0049] 2 and 3, the PHY (physical layer) provides an information transfer service to a higher layer using a physical channel. The physical layer is connected to a higher layer, the MAC (Medium Access Control) layer, via a transport channel. Data moves between the MAC layer and the physical layer via the transport channel. Transport channels are classified according to how and what characteristics data is transmitted over the radio interface.

[0050] Data is transferred between different physical layers, i.e., between the physical layers of a transmitter and a receiver, via a physical channel. The physical channel can be modulated using Orthogonal Frequency Division Multiplexing (OFDM) and uses time and frequency as radio resources.

[0051] The functions of the MAC layer include mapping between logical channels and transport channels and multiplexing / demultiplexing MAC service data units (SDUs) belonging to logical channels onto transport channels into transport blocks provided to physical channels. The MAC layer provides services to the Radio Link Control (RLC) layer via the logical channels.

[0052] The functions of the RLC layer include concatenation, segmentation, and reassembly of RLC SDUs. To guarantee various Quality of Service (QoS) required by Radio Bearers (RBs), the RLC layer provides three operation modes: Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode (AM). AM RLC provides error correction via automatic repeat request (ARQ).

[0053] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer is responsible for controlling logical channels, transport channels, and physical channels in relation to the configuration, reconfiguration, and release of radio bearers. RB refers to a logical path provided by the first layer (PHY layer) and the second layer (MAC layer, RLC layer, and PDCP layer) for data transmission between a terminal and a network.

[0054] The functions of the Packet Data Convergence Protocol (PDCP) layer in the user plane include user data transmission, header compression, and ciphering. The functions of the Packet Data Convergence Protocol (PDCP) layer in the control plane include control plane data transmission and encryption / integrity protection.

[0055] RB configuration refers to the process of defining the characteristics of the radio protocol layer and channel to provide a specific service and setting their specific parameters and operation methods. RBs are divided into two types: SRB (Signaling RB) and DRB (Data RB). SRB is used as a path to transmit RRC messages in the control plane, and DRB is used as a path to transmit user data in the user plane.

[0056] If an RRC connection is established between the RRC layer of the terminal and the RRC layer of the E-UTRAN, the terminal is in an RRC connected state; otherwise, the terminal is in an RRC idle state.

[0057] Downlink transport channels for transmitting data from a network to a terminal include a Broadcast Channel (BCH) for transmitting system information and a Shared Channel (SCH) for transmitting user traffic and control messages. Traffic or control messages of downlink multicast or broadcast services can be transmitted via the downlink SCH or via a separate Multicast Channel (MCH). Meanwhile, uplink transport channels for transmitting data from a terminal to a network include a Random Access Channel (RACH) for transmitting an initial control message and a Shared Channel (SCH) for transmitting user traffic and control messages.

[0058] Above the transport channel, logical channels that are mapped to the transport channel include the Broadcast Control Channel (BCCH), the Paging Control Channel (PCCH), the Common Control Channel (CCCH), the Multicast Control Channel (MCCH), the Multicast Traffic Channel (MTCH), etc.

[0059] A physical channel is composed of a number of OFDM symbols in the time domain and a number of sub-carriers in the frequency domain. One sub-frame is composed of a number of OFDM symbols in the time domain. A resource block is a resource allocation unit and is composed of a number of OFDM symbols and a number of sub-carriers. In addition, each sub-frame can use a specific sub-carrier of a specific OFDM symbol (e.g., the first OFDM symbol) of the sub-frame for a Physical Downlink Control Channel (PDCCH), i.e., an L1 / L2 control channel. A Transmission Time Interval (TTI) is a unit time for sub-frame transmission.

[0060] Figure 4 illustrates the functional division between NG-RAN and 5GC.

[0061] Referring to FIG. 4, the gNB provides functions such as inter-cell radio resource management (Inter Cell RRM), radio bearer management (RB control), connection mobility control, radio admission control, measurement configuration & provision, dynamic resource allocation, etc. The AMF provides functions such as NAS security, idle state mobility processing, etc. The UPF provides functions such as mobility anchoring, PDU processing, etc. The SMF (Session Management Function) provides functions such as terminal IP address allocation, PDU session control, etc.

[0062] FIG. 5 illustrates a frame structure that can be applied in NR.

[0063] Referring to FIG. 5, in NR, radio frames (hereinafter, abbreviated as frames) can be used for uplink and downlink transmission. A frame has a length of 10 ms and can be defined as two 5 ms half-frames (HF). A half-frame can be defined as five 1 ms subframes (SF). A subframe can be divided into one or more slots, and the number of slots in a subframe depends on a subcarrier spacing (SCS). Each slot includes 12 or 14 OFDM(A) symbols depending on a cyclic prefix (CP). If a normal CP is used, each slot includes 14 symbols. If an extended CP is used, each slot includes 12 symbols. Here, the symbols can include OFDM symbols (or CP-OFDM symbols) and SC-FDMA symbols (or DFT-s-OFDM symbols).

[0064] Table 1 below illustrates an example of a subcarrier spacing configuration μ.

[0065] [Table 1]

[0066] Table 2 below shows the number of slots (N frame,μ slot ), the number of slots in a subframe (N subframe,μ slot ), the number of symbols in the slot (N slot symb ) are some examples.

[0067] [Table 2]

[0068] In FIG. 5, examples are shown for μ=0, 1, 2, and 3.

[0069] The following Table 2-1 shows examples of how the number of symbols per slot, the number of slots per frame, and the number of slots per subframe change depending on the SCS when an extended CP is used.

[0070] [Table 2-1]

[0071] In the NR system, OFDM(A) numerology (e.g., SCS, CP length, etc.) can be set to be different between multiple cells merged into one terminal, and thus the (absolute time) duration of time resources (e.g., SF, slot, or TTI) (commonly referred to as TU (Time Unit) for convenience) consisting of the same number of symbols can be set to be different between the merged cells.

[0072] FIG. 6 illustrates a slot structure.

[0073] A slot may include multiple symbols in the time domain. For example, in the case of normal CP, one slot may include 14 symbols (or 7 symbols), and in the case of extended CP, one slot may include 12 symbols (or 6 symbols). A carrier may include multiple subcarriers in the frequency domain. A resource block (RB) may be defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A bandwidth part (BWP) may be defined as multiple (P) consecutive RBs in the frequency domain and may correspond to one numerology (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., 5) BWPs. Data communication is performed via an activated BWP, and only one BWP may be activated for one terminal. Each element in the resource grid is called a resource element (RE), and one complex symbol may be mapped to it.

[0074] A physical downlink control channel (PDCCH) can be composed of one or more control channel elements (CCEs) as shown in Table 3 below.

[0075] [Table 3]

[0076] That is, the PDCCH is transmitted via resources consisting of 1, 2, 4, 8 or 16 CCEs, where the CCE consists of 6 resource element groups (REGs), and one REG consists of one resource block in the frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in the time domain.

[0077] Monitoring refers to decoding each PDCCH candidate according to a downlink control information (DCI) format. The UE monitors a set of PDCCH candidates in one or more core sets (CORESETs, described below) on an activated DL BWP of each activated serving cell for which PDCCH monitoring is configured according to a corresponding search space set.

[0078] In NR, a new unit called a control resource set (CORESET) can be introduced. A terminal can receive the PDCCH in the core set.

[0079] FIG. 7 illustrates the core set.

[0080] Referring to FIG. 7, the core set is N CORESET RB It consists of N resource blocks in the time domain. CORESET symb ∈{1, 2, 3} symbols. N CORESET RB , N CORESET symb can be provided by the base station via higher layer signaling. As shown in FIG 7, a core set can include multiple CCEs (or REGs).

[0081] A terminal may attempt PDCCH detection in units of 1, 2, 4, 8, or 16 CCEs within a core set. One or more CCEs for which PDCCH detection can be attempted may be referred to as PDCCH candidates.

[0082] A terminal can receive multiple core set configurations.

[0083] In a conventional wireless communication system (e.g., LTE / LTE-A), a control region is configured over the entire system band used by a base station. All terminals, except for some terminals (e.g., eMTC / NB-IoT terminals) that support only a narrow band, should be able to receive radio signals over the entire system band of the base station in order to accurately receive / decode control information transmitted by the base station.

[0084] In contrast, NR introduced the aforementioned core set. A core set can be said to be a radio resource for control information that a terminal should receive, and can use only a portion of the system band in the frequency domain instead of the entire system band. Also, in the time domain, it can use only a portion of the symbols in a slot. The base station can assign a core set to each terminal and transmit control information via the assigned core set. A terminal in NR can receive control information from the base station without necessarily receiving the entire system band.

[0085] The core sets include a terminal-specific core set for transmitting terminal-specific control information, and a common core set for transmitting control information common to all terminals.

[0086] Meanwhile, in NR, high reliability may be required depending on the application field, and in such a situation, the target block error rate (BLER) for downlink control information (DCI) transmitted via a downlink control channel (e.g., physical downlink control channel (PDCCH)) may be significantly lower than that of the conventional technology. As an example of a method for satisfying such a requirement for high reliability, the amount of contents included in the DCI may be reduced and / or the amount of resources used when transmitting the DCI may be increased. In this case, the resources may include at least one of resources in the time domain, resources in the frequency domain, resources in the code domain, and resources in the spatial domain.

[0087] The following technologies / features can be applied in NR:

[0088] <Self-contained subframe structure>

[0089] FIG. 8 shows an example of a frame structure for a new wireless access technology.

[0090] In NR, in order to minimize latency, a structure in which the control channel and data channel are time division multiplexed (TDM) within one TTI, as shown in Figure 8, is considered as one of the frame structures.

[0091] In FIG. 8, the shaded area indicates the downlink control area, and the black area indicates the uplink control area. The area without markings may be used for downlink data (DL data) transmission, or for uplink data (UL data) transmission. The feature of this structure is that downlink (DL) transmission and uplink (UL) transmission proceed sequentially within one subframe, and DL data can be sent within a subframe, and UL ACK / NACK (Acknowledgement / Not-acknowledgement) can also be received. As a result, the time required for data retransmission when a data transmission error occurs can be reduced, and therefore the latency of the final data transmission can be minimized.

[0092] In such a data and control TDMed subframe structure, a time gap is required for the base station and the terminal to switch from a transmission mode to a reception mode or vice versa. For this reason, some OFDM symbols at the time of switching from DL to UL in the self-contained subframe structure are set as a guard period (GP).

[0093] FIG. 9 illustrates a self-contained slot structure.

[0094] In an NR system, a DL control channel, DL or UL data, a UL control channel, etc. can all be included in one slot. For example, the first N symbols in a slot can be used to transmit a DL control channel (hereinafter, DL control region), and the last M symbols in the slot can be used to transmit a UL control channel (hereinafter, UL control region). N and M are each an integer greater than or equal to 0. A resource region between the DL control region and the UL control region (hereinafter, data region) can be used for DL ​​data transmission or for UL data transmission. As an example, the following configuration can be considered. Each section is listed in chronological order.

[0095] 1.DL only configuration

[0096] 2.UL only configuration

[0097] 3.Mixed UL-DL configuration

[0098] -DL area + GP (Guard Period) + UL control area

[0099] -DL control area + GP + UL area

[0100] DL region: (i) DL data region, (ii) DL control region + DL data region

[0101] UL area: (i) UL data area, (ii) UL data area + UL control area

[0102] A PDCCH can be transmitted in the DL control region, and a PDSCH (physical downlink shared channel) can be transmitted in the DL data region. A PUCCH (physical uplink control channel) can be transmitted in the UL control region, and a PUSCH (physical uplink shared channel) can be transmitted in the UL data region. Downlink Control Information (DCI), such as DL data scheduling information and UL data scheduling information, can be transmitted in the PDCCH. Uplink Control Information (UCI), such as ACK / NACK (Positive Acknowledgement / Negative Acknowledgement) information, CSI (Channel State Information), and SR (Scheduling Request) for DL ​​data can be transmitted in the PUCCH. The GP provides a time gap during the process in which the base station and the terminal switch from a transmission mode to a reception mode or from a reception mode to a transmission mode. Some symbols at the time of switching from DL to UL within a subframe can be set as the GP.

[0103] <Analog beamforming #1>

[0104] In millimeter waves (mmW), the wavelength is shorter, making it possible to install multiple antenna elements in the same area. That is, in the 30GHz band, the wavelength is 1cm, and a total of 100 antenna elements can be installed in a 2-dimensional array at intervals of 0.5 wavelengths (lambda) on a 5x5cm panel. Therefore, in mmW, multiple antenna elements are used to increase the beamforming (BF) gain and increase coverage or throughput.

[0105] In this case, if a transceiver unit (TXRU) is provided so that transmission power and phase can be adjusted for each antenna element, independent beamforming for each frequency resource is possible. However, there is a problem in that it is not practical in terms of cost to install a TXRU for all of the 100 or so antenna elements. Therefore, a method is being considered in which multiple antenna elements are mapped to one TXRU and the beam direction is adjusted using an analog phase shifter. This analog beamforming method has the disadvantage that it can only form one beam direction in the entire band and cannot perform frequency selective beamforming.

[0106] As an intermediate form between digital beamforming and analog beamforming, hybrid beamforming having B TXRUs, which is less than Q antenna elements, can be considered. In this case, although there are differences depending on the connection method of B TXRUs and Q antenna elements, the number of beam directions that can be transmitted simultaneously is limited to B or less.

[0107] <Analog beamforming #2>

[0108] In the case where multiple antennas are used in the NR system, a hybrid beamforming technique that combines digital beamforming and analog beamforming is emerging. In this case, analog beamforming (or RF beamforming) performs precoding (or combining) at the RF end, thereby reducing the number of RF chains and D / A (or A / D) converters, and has the advantage of being able to achieve performance close to that of digital beamforming. For convenience, the hybrid beamforming structure can be expressed as N TXRUs and M physical antennas. In this case, digital beamforming for L data layers transmitted from the transmitting end can be expressed as an NbyL matrix, and the converted N digital signals are then converted to analog signals via the TXRU, and analog beamforming expressed as an MbyN matrix is ​​applied.

[0109] System information of the NR system can be transmitted in a broadcasting manner. In this case, analog beams belonging to different antenna panels in one symbol can be transmitted simultaneously, and a method of introducing a beam reference signal (BEAM RS: BRS), which is a reference signal (RS) applied and transmitted by a single analog beam (corresponding to a specific antenna panel) to measure a channel for each analog beam, is being discussed. The BRS can be defined for multiple antenna ports, and each antenna port of the BRS can correspond to a single analog beam. In this case, unlike the BRS, a synchronization signal or xPBCH can be applied and transmitted by all analog beams in an analog beam group so that any terminal can receive it well.

[0110] In NR, a synchronization signal block (SSB, or also called synchronization signal and physical broadcast channel (SS / PBCH)) in the time domain can be composed of four OFDM symbols numbered in ascending order from 0 to 3 within the synchronization signal block, and a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a PBCH associated with a demodulation reference signal (DMRS) can be mapped to the symbols. As mentioned above, the synchronization signal block can also be expressed as an SS / PBCH block.

[0111] In NR, multiple synchronization signal blocks can be transmitted at different times, and SSBs can be used to perform initial access (IA), serving cell measurement, etc., so it is preferable that SSBs are transmitted preferentially when the transmission time and resources of other signals overlap. To this end, the network can broadcast the transmission time and resource information of the SSB or indicate it via UE-specific RRC signaling.

[0112] In NR, beam-based transmission and reception operations can be performed. If the reception performance of the current serving beam is degraded, a process of searching for a new beam can be performed through a process called beam failure recovery (BFR).

[0113] Since BFR is not a process for declaring an error / failure on the link between the network and the UE, it can be assumed that the connection with the current serving cell is maintained even if the BFR process is performed. In the BFR process, measurements are performed on different beams (beams can be expressed as CSI-RS ports or SSB (synchronization signal block) indexes, etc.) set by the network, and the best beam can be selected for the UE. For beams with good measurement results, the UE can proceed with the BFR process in a manner of performing a RACH process associated with the beam.

[0114] The following describes the Transmission Configuration Indicator (TCI) state. The TCI state can be set for each core set of the control channel, and parameters for determining the receiving (Rx) beam of the terminal can be determined based on the TCI state.

[0115] For each downlink bandwidth portion (DL BWP) of the serving cell, the terminal may be configured with up to three core sets. In addition, for each core set, the terminal may be provided with the following information:

[0116] 1) Core set index p (e.g., one of 0 to 11, the index of each core set can be uniquely determined in the BWP of one serving cell);

[0117] 2) PDCCH DM-RS scrambling sequence initialization value;

[0118] 3) A time domain interval of the core set (which may be given in symbols);

[0119] 4) A set of resource blocks;

[0120] 5) CCE-to-REG mapping parameters;

[0121] 6) Antenna port quasi co-location (QCL) information of DM-RS antenna ports for PDCCH reception in each core set (from a set of antenna port quasi co-locations provided by the higher layer parameter "TCI-State");

[0122] 7) Indication of the presence or absence of a transmission configuration indication (TCI) field for a specific DCI format transmitted by the PDCCH in the core set, etc.

[0123] For QCL, if the characteristics of the channel through which symbols on one antenna port are transmitted are inferred from the characteristics of the channel through which symbols on the other antenna port are transmitted, the two antenna ports can be said to be quasi-co-located (QCL). For example, if two signals (A, B) are transmitted from the same transmit antenna array to which the same / similar spatial filters are applied, the two signals may experience the same / similar channel conditions. From the perspective of the receiver, when one of the two signals is received, the other signal can be detected using the channel characteristics of the received signal.

[0124] In this sense, A and B are QCL'd in the sense that A and B experience similar channel conditions, and therefore channel information estimated to detect A is also useful in detecting B. Here, the channel conditions can be defined by, for example, Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameters, etc.

[0125] The "TCI-State" parameter associates one or two downlink reference signals with a corresponding QCL type (there are QCL types A, B, C, and D, see Table 4).

[0126] [Table 4]

[0127] Each "TCI-State" may include parameters for setting a quasi-co-location (QCL) relationship between one or two downlink reference signals and a DM-RS port of a PDSCH (or PDCCH) or a CSI-RS port of a CSI-RS resource.

[0128] Meanwhile, in each DL BWP configured in a UE in one serving cell, the UE may be provided with 10 or less search space sets. For each search space set, the UE may be provided with at least one of the following information:

[0129] 1) Search space set index s (0≦s<40), 2) Association between core set P and search space set s, 3) PDCCH monitoring period and PDCCH monitoring offset (slot unit), 4) PDCCH monitoring pattern within a slot (e.g., indicating the first symbol of the core set within a slot for PDCCH monitoring), 5) Number of slots in which search space set s exists, 6) Number of PDCCH candidates per CCE aggregation level, 7) Information indicating whether search space set s is CSS or USS, etc.

[0130] Core set #0 in NR can be configured by PBCH (or UE-specific signaling for handover, PSCell configuration, or BWP configuration). Search space (SS) set #0 configured by PBCH can have different monitoring offsets (e.g., slot offset, symbol offset) for each associated SSB. This is necessary to minimize the search space occasions at which the UE should monitor. It is also necessary in the sense of providing a beam sweeping control / data region that can transmit control / data by each beam so that communication with the UE can be sustained in a situation where the UE's best beam dynamically changes.

[0131] FIG. 10 illustrates physical channels and typical signal transmission.

[0132] 10, in a wireless communication system, a terminal receives information from a base station through a downlink (DL), and transmits information to the base station through an uplink (UL). Information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist according to the type / use of the information transmitted and received.

[0133] When a terminal is turned on after being turned off or newly enters a cell, it performs an initial cell search operation such as synchronizing with a base station (S11). For this, the terminal receives a Primary Synchronization Channel (PSCH) and a Secondary Synchronization Channel (SSCH) from the base station to synchronize with the base station and obtain information such as a cell identity (cell ID). In addition, the terminal can obtain broadcast information within a cell by receiving a Physical Broadcast Channel (PBCH) from the base station. In addition, the terminal can receive a Downlink Reference Signal (DL RS) in the initial cell search step to check the downlink channel state.

[0134] The (initial) cell search may refer to a procedure in which a terminal acquires time and frequency synchronization with a cell and detects the cell ID of the cell. The cell search may be performed based on the primary synchronization signal and secondary synchronization signal of the cell, and the PBCH DMRS.

[0135] After completing the initial cell search, the terminal can receive a physical downlink control channel (PDCCH) and a corresponding physical downlink control channel (PDSCH) to obtain more specific system information (S12).

[0136] Thereafter, the terminal may perform a random access procedure to complete connection to the base station (S13 to S16). Specifically, the terminal may transmit a preamble over a physical random access channel (PRACH) (S13) and receive a random access response (RAR) for the preamble over a PDCCH and a corresponding PDSCH (S14). Thereafter, the terminal may transmit a physical uplink shared channel (PUSCH) using scheduling information in the RAR (S15) and perform a contention resolution procedure like the PDCCH and a corresponding PDSCH (this may be referred to as a process of receiving a contention resolution message) (S16).

[0137] The terminal that has performed the above-mentioned procedure can then perform PDCCH / PDSCH reception (S17) and PUSCH / PUCCH (Physical Uplink Control Channel) transmission (S18) as a general uplink / downlink signal transmission procedure. Control information that the terminal transmits to the base station is called UCI (Uplink Control Information). UCI includes HARQ ACK / NACK (Hybrid Automatic Repeat and reQuest Acknowledgement / Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), etc. CSI includes CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indication), etc. UCI is generally transmitted via PUCCH, but can be transmitted via PUSCH when control information and data are to be transmitted simultaneously. In addition, the terminal can aperiodically transmit UCI via PUSCH at the request / instruction of the network.

[0138] When bandwidth adaptation (BA) is configured, in order to enable reasonable battery consumption, only one uplink BWP (bandwidth part) and one downlink BWP or only one downlink / uplink BWP pair for each uplink carrier can be activated at a time in the active serving cell, and all other BWPs configured in the UE are deactivated. In a deactivated BWP, the UE does not monitor the PDCCH and does not transmit on the PUCCH, PRACH, and UL-SCH.

[0139] For a BA, the reception and transmission bandwidth of the terminal need not be as wide as the bandwidth of the cell and can be adjusted: the width can be commanded to change (e.g., shrink during periods of low activity to save power), the location in the frequency domain can be moved (e.g., to increase scheduling flexibility), and the subcarrier spacing can be commanded to change (e.g., to allow for different services). A subset of the entire cell bandwidth of a cell is called a bandwidth part (BWP), and the BA is obtained by configuring BWP(s) in the terminal and informing the terminal which of the configured BWPs is currently active. When a BA is configured, it is sufficient for the terminal to monitor the PDCCH on one active BWP. That is, there is no need to monitor the PDCCH on the entire downlink frequency of the cell. A BWP inactivation timer (independent of the DRX inactivation timer described above) is used when converting an active BWP to a default BWP: the timer is restarted if PDCCH decoding is successful, and switching to the default BWP occurs if the timer expires.

[0140] The following describes an integrated access and backhaul link (IAB). For convenience of explanation, the proposed method will be described based on a new RAT (NR) system, but the range of systems to which the proposed method is applied can be extended to other systems such as 3GPP LTE / LTE-A systems in addition to the NR system.

[0141] One potential technology targeted at enabling future cellular network deployment scenarios and applications is the flexible and very dense deployment of NR cells without the need to proportionately densify the transport network as support for wireless backhaul and relay links.

[0142] The expected availability of larger bandwidths in NR compared to LTE (e.g., mmWave spectrum) along with native deployment of massive MIMO or multi-beam systems creates an opportunity for the development and deployment of integrated access and backhaul links. This allows for easier deployment of dense networks of self-backhauled NR cells in a more integrated manner by establishing multiple control and data channels / procedures defined to provide connectivity or access to terminals. Such a system is referred to as integrated access and backhaul links (IAB).

[0143] For the purposes of this disclosure, the following definitions apply:

[0144] -AC(x): Access link between node(x) and terminal(s).

[0145] -BH(xy): Backhaul link between node (x) and node (y).

[0146] In this case, the node may refer to a DgNB (donor gNB) or a relay node (RN), where the DgNB or donor node is a gNB that provides a function to support backhaul for the IAB node.

[0147] When relay node 1 and relay node 2 exist, when relay node 1 is connected to relay node 2 via a backhaul link and relays data transmitted to and received from relay node 2, relay node 1 is called the parent node of relay node 2, and relay node 2 is called the child node of relay node 1.

[0148] In this specification, technical features individually described in one drawing may be embodied individually or simultaneously.

[0149] The following drawings are created to explain a specific example of the present specification. The names of specific devices and names of specific signals / messages / fields described in the drawings are presented for illustrative purposes only, and the technical features of the present specification are not limited to the specific names used in the following drawings.

[0150] In this disclosure, a method for determining operating frequency resources of a mobile termination (MT) and a remote unit (RU) of a network-controlled repeater (NCR) in an NR environment is proposed. Hereinafter, the network-controlled repeater may be referred to as a relay or simply as a repeater. Hereinafter, the MT may be referred to as an NCR-MT, and the RU may be referred to as an NCR-Fwd (forwarding).

[0151] <Transport network architecture for 5G>

[0152] FIG. 11 illustrates a transport network architecture for 5G.

[0153] The ITU-T (Telecommunication Standardization Sector) has adopted a transport network architecture for 5G consisting of three logical elements: CU (Centralized Unit), DU (Distributed Unit), and RU (Remote Unit), as shown in Figure 11(a).

[0154] In this model, mid and lower layer functions are divided into DU and RU. The RU implements RF functions and, depending on the functional division between the RU and DU, also implements low-PHY and high-PHY functions, if possible. Depending on the network requirements, the CU, DU, and RU can be grouped in different combinations to form actual physical network elements.

[0155] For example, CUs, DUs, and RUs can be grouped in various combinations as shown in (b) to (d) of Figure 11. This provides flexibility to accommodate various network architectures, applications, and transport network requirements.

[0156] As shown in FIG. 11, the transport network between the 5GC and the CU is called the backhaul. The backhaul network implements a 3GPP NG interface. Similarly, the transport network between the CU and the DU is called the midhaul. The midhaul network implements a 3GPP F1 interface. Finally, the transport network between the DU and the RU is called the fronthaul. The backhaul, midhaul, and fronthaul can be commonly referred to as xhaul.

[0157] Reconfigurable intelligent surfaces (RIS), also known as intelligent reflective surfaces (IRS) and large intelligent surfaces (LIS), are programmable structures that can be used to control electromagnetic (EM) waves by modifying the electrical and magnetic properties of the surface.

[0158] In addition to controlling electromagnetic waves, a RIS can also be used to integrate sensing capabilities to sense the wireless environment. Placing a RIS in the environment in which a wireless system operates can provide at least partial control over the attributes of the wireless channel.

[0159] The unique capabilities of RIS can provide many benefits, including the potential to improve stability and coverage performance through beamforming or range extension. The ability to control the radio environment somewhat changes the existing wireless system design paradigm, where the wireless channel was largely viewed as an uncontrollable entity that distorted the transmitted signal. Traditionally, the transmitter (TX) and receiver (RX) were designed to evenly distribute the effects of the channel. A variety of scenarios can be imagined, from placing a single RIS on a wall to sending a signal coming in a predefined direction.

[0160] By using RIS, the "transmission effect" of the base station signal through which external signals are transmitted into the building can be provided, and by providing the "reflection effect" in the NLoS (non-line-of-sight) environment, the coverage for shadow areas can be improved.

[0161] <Network-controlled repeater in NR>

[0162] (1) Conventional RF repeater

[0163] (Conventionally) The RF repeater is a non-regenerative type of relay node that simply amplifies and transmits everything it receives. The main advantages of the RF repeater are low cost, ease of deployment, and no increase in latency. The main disadvantage is that it can amplify both signals and noise, contributing to an increase in system interference (contamination).

[0164] (2) Rel-17 WI's RF repeater (RAN4) (Rel-17 WI on RF repeater (RAN4))

[0165] The RF repeater is defined in Rel-17 of RAN4 for the FR1 band FDD / TDD and the FR2 band. The Rel-17 WID (Work Item Description) only includes RF requirements. It is explicitly stated in the RAN4 WID that "it is assumed that the repeater does not perform adaptive beamforming towards the terminal."

[0166] (3) Rel-18 Network controlled repeater for NR

[0167] Coverage is a fundamental aspect of cellular network deployment. Mobile operators rely on various types of network nodes to provide comprehensive coverage. The deployment of regular full-stack cells is an option, but may not always be possible (e.g., in the absence of backhaul availability) or economically viable.

[0168] As a result, new types of network nodes have been considered to give mobile operators more flexibility in network deployment. For example, the Integrated Access and Backhaul (IAB) is a new type of network node that does not require a wired backhaul and was introduced in Rel-16 and improved in Rel-17. Another type of network node is an RF repeater that simply amplifies and transmits all signals it receives. RF repeaters are widely deployed to complement the coverage provided by regular full-stack cells in 2G, 3G, and 4G.

[0169] RF repeaters provide a cost-effective means of extending network coverage, but they have limitations. RF repeaters simply perform the task of amplification and transmission without consideration of various factors that can improve performance, such as semi-static and / or dynamic downlink / uplink configuration, adaptive transmitter / receiver spatial beamforming, information for ON-OFF status, etc.

[0170] A network controlled repeater (NCR) is an improved version of existing RF repeaters in that it receives and processes side control information from the network. The side control information allows the network controlled repeater to perform amplification and transmission tasks in a more efficient manner. Potential benefits can include mitigation of unnecessary noise amplification, better spatially directional transmission and reception, simplified network integration, etc.

[0171] Research into network controlled repeaters (NCR) can focus on the following scenarios and assumptions:

[0172] Network controlled repeaters are in-band RF repeaters used to extend network coverage in the FR1 and FR2 bands, and FR2 deployments can be prioritized for all outdoor and O2I scenarios.

[0173] The network controlled repeater can be transparent to the terminals.

[0174] A network controlled repeater can simultaneously maintain a base station-repeater link and a repeater-terminal link.

[0175] Cost-effectiveness is a key consideration for network-controlled repeaters.

[0176] The following side control information must be studied and identified:

[0177] Beam forming information, timing information for aligning the transmission and reception boundaries of network control repeaters, UL-DL TDD setting information, ON-OFF information for efficient interference management and improved energy efficiency, power control information for efficient interference management, etc.

[0178] It is necessary to research and identify L1 / L2 signals (including corresponding settings) for transmitting side control information. In the management aspect of network control repeaters, it is necessary to research the identification and authentication of network control repeaters.

[0179] The NCR can be considered to be composed of an RU and an MT.

[0180] FIG. 12 shows an example of a topology in which an NCR performs transmission and reception between a base station and a terminal.

[0181] 12, a CU and / or a DU exist in a base station, and an NCR may be connected to the base station. The NCR may be composed of an MT and an RU.

[0182] The RU can be composed of only the RF layer. The RU can receive signals transmitted by the base station at the RF end and forward them to the terminal, and can receive signals transmitted by the terminal at the RF end and forward them to the base station.

[0183] The RU only transmits signals between the base station and the terminal, and cannot generate signals / channels by itself and transmit them to the base station / terminal, or receive and detect signals / channels from the base station / terminal.

[0184] In order to forward a received signal, the RU can adjust the transmit / receive beam direction, DL / UL direction, ON / OFF, transmit (Tx) power, etc. at the RF end. However, such RU operations cannot be determined by the NCR itself and can only be controlled by the base station.

[0185] The MT may include an RF layer and an L1, L2, and / or L3 layer. For example, the MT may be composed of only an RF layer and an L1 layer or an L1 / L2 layer. Or, the MT may be composed of an RF layer and an L1 / L2 / L3 layer.

[0186] The MT can detect / receive signals / channels transmitted by the base station, generate and transmit signals / channels to the base station, and receive information (i.e., side control information) required to control the operation of the RU from the base station. The MT does not transmit or receive with the terminal.

[0187] FIG. 13 is a diagram comparing the operation of NCR and existing RF repeaters.

[0188] As shown in (a) of Figure 13, in the case of the existing RF repeater, beamforming was performed applying omni-directions or fixed directions, whereas in the NCR, beamforming gain can be obtained by adaptively adjusting the Tx / Rx beam direction of the NCR according to the terminal position and the terminal channel condition as shown in (b) of Figure 13.

[0189] In the case of existing RF repeaters, the TDD system was unable to distinguish between DL / UL directions and always performed simultaneous transmission and reception in the DL and UL directions. Or, only fixed TDD settings were applied and switching between DL and UL directions was performed in a fixed time pattern. In contrast, NCR can perform DL / UL switching by taking the TDD settings into consideration. This enables adaptive DL / UL operation and reduces power waste and interference caused by forwarding unnecessary signals.

[0190] Existing RF repeaters always amplified and transmitted the power of the received signal regardless of whether the base station or terminal was transmitting a signal. This resulted in unnecessary power consumption and increased interference to the surrounding area. NCR performs ON / OFF operation, and when there is no signal to transmit to the base station / terminal, it turns off the RU operation to prevent unnecessary signals from being transmitted.

[0191] Existing RF repeaters amplified the power of received signals at a fixed ratio before transmitting them. With NCR, when transmitting signals with unnecessarily high power, the NCR transmission power is reduced to reduce the impact of interference on the surroundings, and when transmitting signals with less power, the NCR transmission power is increased to ensure stable transmission of signals to the receiver.

[0192] Existing RF repeaters operate without knowing the DL / UL slot boundary. In contrast, in the case of NCR, the NCR must know the DL and UL transmission / reception boundaries in order to adaptively adjust beamforming, ON / OFF, DL / UL direction, Tx power, etc., as described above. This allows the RU to operate differently for each unit of time (e.g., slot / symbol).

[0193] FIG. 14 illustrates links between base stations, NCRs, and terminals.

[0194] Referring to FIG. 14, the NCR may include NCR-MT and NCR-Fwd.

[0195] The NCR-MT may be defined as a functional entity that communicates with the base station (gNB) via a control link (C-link) to enable information exchange (e.g., side control information). The C-link may be based on the NR Uu interface.

[0196] The side control information is at least information for NCR-Fwd control.

[0197] The NCR-Fwd can be defined as a functional entity that performs amplification and transmission of UL / DL RF signals between a base station and a terminal (UE) via a backhaul link and an access link. The operation of the NCR-Fwd is controlled by side control information received from the base station.

[0198] The contents of this disclosure are described assuming operation in an NCR. However, the contents of this disclosure can also be applied to devices that are not NCRs. In particular, the contents of this disclosure can be applied to the operation of a RIS. For this reason, the NCR referred to in this disclosure can be replaced with a RIS and expanded / analyzed. In this case, the RU can perform the role of forwarding signals from the base station to the terminal and forwarding signals from the terminal to the base station in the RIS, and the MT can perform the role of receiving side control information from the base station to control signal transmission of the RU.

[0199] Based on these discussions, this disclosure proposes an association between side control information and time domain resources during NCR operation.

[0200] In the present disclosure, a network can be analyzed by being substituted for a base station or a CU / DU, and a base station can be analyzed by being substituted for a network, a CU, or a DU.

[0201] In the NCR, the RU can consider adjusting the transmit / receive beam direction, DL / UL direction, ON / OFF, transmit power, etc. at the RF end to forward the signal received. However, such RU operation cannot be determined by the NCR itself, but can only be controlled by the base station. For this reason, the MT can receive information required to control the operation of the RU from the base station (i.e., side control information). Such side control information can be transmitted via L1 / L2 signaling such as DCI and MAC-CE.

[0202] The side control information may include, for example, all or some of the following information:

[0203] 1) Beamforming information. This may refer to information regarding the Tx / Rx beam direction of the RU. Such information may include beam directions for UL Tx to the base station, DL Rx from the base station, DL Tx to the terminal, and / or UL Rx from the terminal.

[0204] 2) Timing information to align transmission / reception boundaries of network-controlled repeater. This can mean information for the RU to align Tx / Rx slot or symbol boundaries.

[0205] 3) Information on UL-DL TDD configuration. This may mean information on the DL / UL direction of the RU.

[0206] 4) ON-OFF information for efficient interference management and improved energy efficiency. This may mean information on the ON-OFF operation of an RU.

[0207] 5) Power control information for efficient interference management. This may mean information on the transmission power of the RU. Such information may include UL transmission power to the base station and / or DL ​​transmission power to the terminal.

[0208] The side control information may be applied differently for each time resource, in which case the side control information needs to be indicated for each time resource.

[0209] When side control information is transmitted by MAC-CE and / or DCI, the side control information can be transmitted by different MAC-CE and / or DCI for each time resource unit. In this case, there is a burden of transmitting side control information for each time resource unit. In consideration of this, when transmitting side control information only once, side control information for a plurality of time resource units can be indicated. In this case, there is a drawback in that side control information for a plurality of time resource units must be determined and set in advance, but efficient signaling is possible.

[0210] Hereinafter, a method for configuring the contents of side control information instructed by a network-controlled repeater (NCR) in consideration of various side control information when the NCR operates in an NR environment will be described.

[0211] In addition, for an RU operation in NCR, a method for indicating various side control information when the base station indicates to the MT side control information applied for the RU operation in a specific time resource will be described.

[0212] In the present disclosure, it is assumed that, for example, all or part of the following information is included and indicated in the side control information. However, other information may also be included and indicated in the side control information. Information that may be included in the side control information and the corresponding RU operation are as follows:

[0213] 1) Beamforming information.

[0214] Information on the transmit beam (Tx beam) direction and / or receive beam (Rx beam) direction applied by the RU can be included in the side control information and instructed from the base station to the MT.

[0215] Such beamforming information may include, in whole or in part, the following:

[0216] i) Information on the direction of the RU's uplink transmission (UL-Tx) and / or downlink reception (DL-Rx) beam for the base station-RU link. Upon receiving the information on the UL-TX beam direction, the RU performs UL transmission to the base station in accordance with the instructed UL-TX beam direction.

[0217] When the RU receives the instruction regarding the DL-RX beam direction, the RU performs DL reception from the base station in accordance with the instructed DL-RX beam direction.

[0218] ii) Information on the direction of the DL-Tx and / or UL-RX beam of the RU for the RU-UE link.

[0219] 2) ON / OFF information.

[0220] Information on whether the RU is operational can be included in side control information and instructed from the base station to the MT.

[0221] When the ON / OFF information indicates that the RU is ON, the RU performs Tx / Rx operations for the base station-RU link and Tx / Rx operations for the RU-UE link. When the ON / OFF information indicates that the RU is OFF, the RU does not perform Tx / Rx operations for the base station-RU link and Tx / Rx operations for the RU-UE link.

[0222] 3)DL / UL information

[0223] Information regarding the DL / UL direction of the RU can be included in the side control information and instructed from the base station to the MT.

[0224] When receiving a DL instruction by the DL / UL information, the RU performs DL reception from the base station over the base station-RU link, and performs DL transmission to the terminal over the RU-UE link, i.e., the RU receives a DL signal from the base station and forwards the received signal to the terminal.

[0225] When receiving a UL instruction from the DL / UL information, the RU performs UL transmission to the base station over the base station-RU link, and performs UL reception from the terminal over the RU-UE link, i.e., the RU receives a UL signal from the terminal and forwards the received signal to the base station.

[0226] 4) Tx (transmit) power control information

[0227] Information on the gain value of the transmission power to be applied when the RU forwards and transmits the received signal can be included in the side control information and instructed from the base station to the MT.

[0228] Such transmit power information may include, in whole or in part, the following:

[0229] i) Information on the UL transmit power gain of the RU for the base station-RU link.

[0230] When the RU receives an instruction regarding information on the UL transmission power gain, the RU performs UL transmission to the base station-RU link by boosting the power of the UL signal received from the RU-UE link by the gain value relative to the received power in accordance with the instructed gain value (i.e., the product of the received power and gain (= received power x gain)) as the UL transmission power.

[0231] ii) Information on the DL transmit power gain of the RU for the RU-UE link.

[0232] When the RU receives an instruction regarding information regarding DL transmission power gain, the RU performs DL transmission to the RU-UE link by boosting the power of the DL signal received on the base station-RU link by the gain value relative to the received power (i.e., received power x gain) in accordance with the instructed gain value as the DL transmission power.

[0233] 5.1. How to Configure the Content of Side Control Information

[0234] Hereinafter, a method for informing an MT of various information together with side control information for an RU's operation in a specific time resource will be described.

[0235] 5.1.1.Separated indication

[0236] Various information included in the side control information can be independently indicated from the base station to the MT. The information according to the value (or state) that each information can have is as follows, for example:

[0237] 1) ON / OFF information.

[0238] The RU can be turned ON or OFF by the value of the ON / OFF information (0 or 1) as shown in the table below.

[0239] [Table 5]

[0240] 2)DL / UL information

[0241] The DL or UL operation of the RU can be indicated by the value of the DL / UL information (0 or 1) as shown in the table below.

[0242] [Table 6]

[0243] Alternatively, the DL operation, UL operation, or flexible operation of the RU can be indicated according to the value of the DL / UL information as shown in the following table. In this case, flexible can mean that it is not determined whether the RU operates in DL or UL (or that the RU can operate in DL or UL, the same below).

[0244] [Table 7]

[0245] Alternatively, the DL operation, UL operation, flexible operation, or full duplex operation of the RU can be indicated according to the value of the DL / UL information as shown in the following table. In this case, flexible may mean that it is not determined whether the RU operates in DL or UL. Full duplex may mean that the RU operates in DL and UL simultaneously (or can support simultaneous operation of DL and UL). In this case, the DL operation, UL operation, or full duplex operation of the RU can also be indicated according to the value of the DL / UL information except for flexible. For example, the state (index) value in Table 8 may indicate DL if it is 0, UL if it is 1, and full duplex if it is 2.

[0246] [Table 8]

[0247] 3) Beam information

[0248] As shown in the table below, the value corresponding to the beam index of the RU can be indicated depending on the value of the beam information.

[0249] [Table 9]

[0250] Such beam information may indicate information for the BS-RU link and information for the RU-UE link independently, or may indicate only information for the RU-UE link.

[0251] Specifically, the beam index may refer to the DL receiving beam index in DL resources and the UL transmitting beam index in UL resources in the case of a base station-RU link.

[0252] And / or, in the case of a RU-UE link, the beam index may refer to a DL transmitting beam index for DL ​​resources and a UL receiving beam index for UL resources.

[0253] 4) Transmission power control information

[0254] As shown in the table below, the value corresponding to the transmission power gain of the RU can be indicated according to the value of the transmission power control information.

[0255] [Table 10]

[0256] In this case, each transmission power gain value corresponding to the transmission power gain 0, 1, ..., N-1 can mean the ratio or dB value of the transmission power to the received power, indicating how many times the received power is boosted before being transmitted.

[0257] Depending on the embodiment, the transmission power gain may refer to the UL transmission power gain in the case of the base station-RU link, and may refer to the DL transmission power gain in the case of the RU-UE link.

[0258] And / or the transmit power gain may refer to DL transmit power gain for DL ​​resources and UL transmit power gain for UL resources.

[0259] 5.1.2.Implicit Instructions

[0260] Some information may be determined implicitly without a separate explicit instruction or without an explicit instruction.

[0261] 1) ON / OFF information

[0262] When the NCR(MT) i) receives or is provided with beam information for a particular time resource, and / or ii) receives or is provided with DL / UL information, it can determine that the RU operation is instructed to be ON in the corresponding time resource. That is, the RU performs Tx / Rx operation for the base station-RU link and Tx / Rx operation for the RU-UE link in the corresponding time resource.

[0263] Otherwise (e.g., if beam information is not instructed / provided for a particular time resource), it can be determined that the RU operation has been instructed to be turned off for the corresponding time resource, i.e., the RU does not perform Tx / Rx operations for the base station-RU link and Tx / Rx operations for the RU-UE link for the corresponding time resource.

[0264] 5.1.3. Combined Instructions

[0265] Various pieces of information contained in the side control information can be combined and instructed together from the base station to the MT.

[0266] 1) Combined indication of DL / UL information and ON / OFF information

[0267] DL / UL information and ON / OFF information for a RU can be indicated together in combination.

[0268] Method 1: For example, DL / UL information and ON / OFF information can be combined and indicated together as shown in the table below.

[0269] [Table 11]

[0270] In this case, if a state (index) corresponding to i) OFF is specified, the NCR (MT) can determine that it has received an OFF command for RU operation.

[0271] ii) When a state (index) corresponding to DL is specified, the NCR (MT) can determine that it has received an ON command for RU operation, and that the RU has received an instruction to operate in DL.

[0272] iii) When the state (index) corresponding to UL is specified, the NCR (MT) can determine that it has received an ON command for RU operation, and that the RU has received an instruction to operate in UL.

[0273] iv) When a flexibly supported state (index) is indicated, the NCR (MT) can determine that it has received an ON instruction for RU operation. It can also mean that it is not determined whether the RU operates in DL or UL.

[0274] Depending on the embodiment, such an indication may not include a state (index) that is flexibly associated with it.

[0275] Method 2: DL / UL information and ON / OFF information can be combined and indicated together as shown in the table below.

[0276] [Table 12]

[0277] In this case, i) when a state (index) corresponding to DL is specified, the NCR (MT) can determine that it has received an ON command for RU operation, and that the RU has received an instruction to operate in DL.

[0278] ii) When the state (index) corresponding to UL is indicated, the NCR (MT) can determine that it has received an ON instruction for RU operation, and that the RU has received an instruction to operate in UL.

[0279] iii) When a state (index) corresponding to flexible is indicated, the NCR (MT) can determine that it has received an OFF instruction for RU operation. In other words, the RU DL / UL information being flexible (undecided) means that the RU DL / UL operation is not certain, and therefore it can mean that the RU operation is not performed.

[0280] 2) Combined indication of DL / UL information and beam information

[0281] DL / UL information and beam information for a RU can be jointly indicated by at least one of the following methods.

[0282] Method 1: DL / UL information and beam information can be combined and indicated as shown in the table below.

[0283] [Table 13]

[0284] In this case, if the corresponding instruction is a beam instruction for the base station-RU link (i.e., for the RU to perform transmission and reception with the base station), i) if a state (index) corresponding to a DL beam index is indicated, the NCR(MT) can determine that it has received a DL instruction for RU operation. Also, the corresponding DL beam index can mean a DL-RX beam index. The RU receives a DL signal from the base station using the corresponding DL beam index.

[0285] ii) If a state (index) corresponding to a UL beam index is indicated, the NCR(MT) can determine that it has received a UL instruction for RU operation. Also, the corresponding UL beam index can mean a UL-TX beam index. The RU transmits a UL signal to the base station using the corresponding UL beam index. Or, if the corresponding instruction is a beam instruction for the RU-UE link (i.e., for the RU to perform transmission and reception with the UE),

[0286] iii) When a state (index) corresponding to a DL beam index is indicated, the NCR (MT) can determine that it has received a DL instruction for RU operation. In addition, the corresponding DL beam index can represent a DL-transmission beam index. The RU transmits a DL signal to the UE using the corresponding DL beam index.

[0287] iv) When a state (index) corresponding to a UL beam index is indicated, the NCR (MT) can determine that it has received a UL instruction for RU operation. The corresponding UL beam index can also mean a UL-RX beam index. The RU receives a UL signal from the UE using the corresponding UL beam index.

[0288] Method 2. Among the bits for indicating beam information, a 1-bit MSB (most significant bit) or LSB (least significant bit) can indicate whether the RU performs DL / UL operation. For example, if the value of the corresponding bit is 0, it can indicate that the RU performs DL operation, and if the value of the corresponding bit is 1, it can indicate that the RU performs UL operation. The remaining bits can indicate the beam index applied by the RU.

[0289] If the corresponding instruction is for an RU-UE link (i.e., for the RU to transmit and receive with the UE), i) if the bit indicating DL / UL information indicates DL, the beam index indicated by the remaining bits may mean a DL-RX beam index. The RU receives a DL signal from the base station using the corresponding DL beam index.

[0290] ii) If the bit indicating DL / UL information indicates UL, the beam index indicated by the remaining bits may represent a UL-TX beam index. The RU transmits a UL signal to the base station using the corresponding UL beam index.

[0291] Alternatively, if the corresponding instruction is a beam instruction for an RU-UE link (i.e., for the RU to transmit and receive with the UE), i) if the bit indicating DL / UL information indicates DL, the beam index indicated by the remaining bits may mean a DL-transmission beam index, and the RU transmits a DL signal to the UE using the corresponding DL beam index.

[0292] ii) When the bit indicating DL / UL information indicates UL, the beam index indicated by the remaining bits may represent a UL-RX beam index. The RU receives a UL signal from the UE using the corresponding UL beam index.

[0293] 3) A combined indication of ON / OFF information and beam information.

[0294] The ON / OFF information and beam information for the RU can be jointly indicated by at least one of the following methods.

[0295] Method 1. For example, ON / OFF information and beam information can be combined and indicated together as shown in the table below.

[0296] [Table 14]

[0297] In this case, i) if a state (index) corresponding to OFF is specified, the NCR (MT) can determine that it has received an OFF command for RU operation, and ii) if a state (index) corresponding to the beam index is specified, the NCR (MT) can determine that it has received an ON command for RU operation.

[0298] Additionally, the beam index indicated by the corresponding state (index) may i) refer to a DL receiving beam index in DL resources and a UL transmitting beam index in UL resources if the corresponding instruction is for an RU-UE link (i.e., for an RU to perform transmission and reception with a terminal), or ii) refer to a beam instruction for an RU-UE link (i.e., for an RU to perform transmission and reception with a terminal), and may refer to a DL transmitting beam index in DL resources and a UL receiving beam index in UL resources.

[0299] Method 2. Among the bits for indicating beam information, the MSB or LSB 1-bit can indicate whether the RU operates ON / OFF. For example, if the value of the corresponding bit is 0, it indicates that the RU operates ON, and if the value of the corresponding bit is 1, it indicates that the RU operates OFF.

[0300] The remaining bits excluding the bit indicating ON / OFF information may represent the beam index applied by the RU.

[0301] i) If the corresponding instruction is for an RU-UE link (i.e., for the RU to perform transmission / reception with the UE), the beam index may refer to a DL receiving beam index in DL resources and a UL transmitting beam index in UL resources.

[0302] ii) Or, if the instruction is a beam instruction for an RU-UE link (i.e., for the RU to perform transmission and reception with the terminal), the beam index may mean a DL transmission beam index for DL ​​resources and a UL reception beam index for UL resources.

[0303] Method 3. A specific beam index (e.g., beam index 0) among the beam indexes indicated via beam information may indicate OFF operation of the RU. That is, when the NCR(MT) receives an instruction for a beam index that applies a specific beam index to the RU, it can determine that this indicates that the RU should operate in OFF mode.

[0304] 4) A combined indication of ON / OFF information, DL / UL information, and beam information.

[0305] DL / UL information, ON / OFF information and beam information for a RU can be jointly indicated by at least one of the following methods.

[0306] Method 1: DL / UL information, ON / OFF information and beam information can be combined and indicated as shown in the table below.

[0307] [Table 15]

[0308] In this case, the state (index) corresponding to OFF (i.e., N D +N U ) is instructed, the NCR(MT) can determine that it has received an OFF command for RU operation.

[0309] The state (index) corresponding to the beam index (e.g., N D When -1) is instructed, the NCR (MT) can determine that it has received an ON instruction for RU operation.

[0310] In this case, if the corresponding instruction is a beam instruction for the base station-RU link (i.e., for the RU to perform transmission and reception with the base station), i) if a state (index) corresponding to a DL beam index is indicated, the NCR(MT) can determine that it has received a DL instruction for RU operation. Also, the corresponding DL beam index can mean a DL-RX beam index. The RU receives a DL signal from the base station using the corresponding DL beam index.

[0311] ii) When a state (index) corresponding to a UL beam index is indicated, the NCR (MT) can determine that it has received a UL instruction for RU operation. The UL beam index can also represent a UL-TX beam index. The RU transmits a UL signal to the base station using the UL beam index.

[0312] Alternatively, if the corresponding instruction is a beam instruction for the RU-UE link (i.e., for the RU to perform transmission and reception with the UE), i) if a state (index) corresponding to a DL beam index is indicated, the NCR(MT) can determine that it has received a DL instruction for RU operation. Also, the corresponding DL beam index can mean a DL-transmission beam index. The RU transmits a DL signal to the UE using the corresponding DL beam index.

[0313] ii) When a state (index) corresponding to a UL beam index is indicated, the NCR (MT) can determine that it has received a UL instruction for RU operation. The UL beam index can also mean a UL-RX beam index. The RU receives a UL signal from the UE using the UL beam index.

[0314] Method 2. Among the bits for indicating beam information, the two bits, MSB or LSB, can indicate RU ON / OFF and DL / UL availability.

[0315] i) One of the two bits can indicate whether the RU is ON / OFF. For example, if the value of the corresponding bit is 0, it indicates that the RU operates ON, and if the value of the corresponding bit is 1, it indicates that the RU operates OFF.

[0316] The remaining bit of the two bits can indicate whether the RU is ON / OFF or not, and can also indicate whether the RU is capable of DL / UL operation. For example, if the value of the corresponding bit is 0, it indicates that the RU performs DL operation, and if the value of the corresponding bit is 1, it indicates that the RU performs UL operation.

[0317] ii) The two bits can indicate the ON / OFF and DL / UL availability of the RU, like the proposed "combined indication of DL / UL information and ON / OFF information."

[0318] The remaining bits, excluding the bits indicating the ON / OFF and DL / UL status of the RU, may represent the beam index applied by the RU.

[0319] i) If the corresponding instruction is for an RU-UE link (i.e., for the RU to perform transmission and reception with the UE), the beam index may mean a DL receiving beam index in DL resources and a UL transmitting beam index in UL resources. ii) Or, if the corresponding instruction is for a beam instruction for an RU-UE link (i.e., for the RU to perform transmission and reception with the UE), the beam index may mean a DL transmitting beam index in DL resources and a UL receiving beam index in UL resources.

[0320] 5) A combined indication of ON / OFF information and transmit power control information.

[0321] The ON / OFF information and transmission power control information for the RU can be indicated together in combination.

[0322] Method 1: ON / OFF information and beam information can be combined and indicated together as shown in the table below.

[0323] [Table 16]

[0324] In this case, if a state (index) corresponding to OFF is indicated (ie, state (index)=M), the NCR (MT) can determine that it has received an OFF instruction for RU operation.

[0325] When a state (index) corresponding to the transmit power gain is indicated (eg, state (index)=M−1), the NCR(MT) can determine that it has received an ON indication for RU operation.

[0326] In this case, the transmission power gain may refer to the UL transmission power gain in the case of the base station-RU link, and may refer to the DL transmission power gain in the case of the RU-UE link.

[0327] i) If the corresponding instruction is a transmission power gain for the base station-RU link (i.e., for the RU to perform UL transmission to the base station), the corresponding transmission power gain may mean a transmission power gain for the UL transmission power of the RU. In this case, the RU applies the corresponding transmission power gain to transmit an uplink signal received from the UE to the base station. That is, the RU sets the transmission power to a boosted power by a value corresponding to the transmission power gain relative to the received power of the received signal, and forwards the signal to the base station.

[0328] ii) If the corresponding instruction is a transmission power gain for the RU-UE link (i.e., for the RU to perform DL transmission to the UE), the corresponding transmission power gain may mean a transmission power gain for the DL transmission power of the RU. In this case, the RU applies the corresponding transmission power gain to transmit a downlink signal received from the base station to the UE. That is, the RU sets the transmission power to a boosted power by a value corresponding to the transmission power gain relative to the received power of the received signal, and forwards the boosted power to the UE.

[0329] And / or the transmit power gain may refer to DL transmit power gain for DL ​​resources and UL transmit power gain for UL resources.

[0330] i) In the UL resource, the corresponding transmission power gain may refer to the transmission power gain for the UL transmission power of the RU. In this case, the RU applies the corresponding transmission power gain to transmit the uplink signal received from the UE to the base station. That is, the RU sets the power boosted by a value corresponding to the transmission power gain relative to the received power of the received signal as the transmission power and forwards it to the base station.

[0331] ii) In DL resources, the corresponding transmission power gain may refer to the transmission power gain for the DL transmission power of the RU. In this case, the RU applies the corresponding transmission power gain to transmit the downlink signal received from the base station to the terminal. That is, the RU sets the boosted power by a value corresponding to the transmission power gain relative to the received power of the received signal as the transmission power and forwards it to the terminal.

[0332] 5.2. Method for indicating various side control information via DCI

[0333] A plurality of pieces of side control information can be indicated from the base station to the MT, and each piece of side control information can be indicated independently or together.

[0334] In the following, a method for informing multiple side control information to an MT will be specifically proposed.

[0335] The side control information can be transmitted from the base station to the MT via MAC-CE and / or DCI. The contents of the present disclosure can also be applied to the case where the side control information is transmitted via MAC-CE, but for convenience of explanation, the description will be given assuming that the side control information is transmitted via DCI.

[0336] Side control information for an RU to operate in a specific frequency resource (carrier and / or sub-band within a carrier) can be indicated from the BS to the MT via DCI. In this case, multiple pieces of side control information can be indicated as follows:

[0337] Method 1. The control information for each side is indicated independently.

[0338] Method 1-1. When there are multiple pieces of side control information, each piece of side control information can be indicated independently of each other. At this time, for example, each piece of side control information can be transmitted via different fields in the DCI. For example, beam information and ON / OFF information can be transmitted via different fields in the DCI. Specifically, multiple pieces of side control information for operation on the same RU on the same frequency resource can be transmitted via consecutive fields in the DCI. At this time, each piece of side control information indicated in each field can include information for one or more time resource units (e.g., slots).

[0339] Method 1-2: A plurality of side control information can be indicated as in Method 1-1. At this time, each side control information can include information for one or more time resource units (e.g., slots), and there are a plurality of pieces of information for one or more time resource units that each side control information can have, and one of the pieces of information can be indicated and applied.

[0340] For this purpose, the MT can be configured with a set of "SCI combinations" for specific side control information.

[0341] In this case, i) an SCI combination ID corresponding to each "SCI combination" can be set for that "SCI combination", and ii) each "SCI combination" can include side control information for one or more time resource units.

[0342] In this case, the MT can receive an indication of side control information for one or more time resource units to be applied to the RU by receiving an indication of the SCI combination ID. When the MT receives an indication of the SCI combination ID, the MT can determine that side control information for one or more time resource units in the "SCI combination" corresponding to the corresponding SCI combination ID is to be applied.

[0343] Such "SCI combinations" can exist and be set independently for each side control information. For example, "beam SCI combinations" can exist independently for beam information and "ON / OFF SCI combinations" can exist independently for ON / OFF information. In this case, the MT can receive settings for a set of "beam SCI combinations" and / or a set of "ON / OFF information".

[0344] In this case, the SCI combination ID value for each side control information may be indicated through different fields in the DCI. Specifically, information on multiple side control information for operation for the same RU on the same frequency resource may be transmitted through consecutive fields in the DCI.

[0345] Method 2: A method in which the control information of each side is indicated together.

[0346] Method 2-1: When multiple pieces of side control information exist, the multiple pieces of side control information can be indicated via the same field in the DCI via one value. Such side control information can include information for one or multiple time resource units (e.g., slots).

[0347] At this time, there are a plurality of pieces of information for one or a plurality of time resource units that the side control information can have, and one of the pieces of information can be indicated and applied.

[0348] For this purpose, the MT can be configured with a set of "SCI combinations" for specific side control information. In this case, i) an SCI combination ID corresponding to the corresponding "SCI combination" can be configured for each "SCI combination". ii) Each "SCI combination" can include side control information for one or more time resource units. iii) When there are multiple pieces of side control information, each piece of side control information can independently have information for one or more time resource units.

[0349] For example, when beam information and ON / OFF information are present in the side control information, each "SCI combination" may include the following information:

[0350] i) Beam information for one or more time resource units, ii) ON / OFF information for one or more time resource units.

[0351] In this case, the MT can receive an indication of side control information for one or more time resource units to be applied to the RU by receiving an indication of an SCI combination ID. When the MT receives an indication of an SCI combination ID, it can determine that side control information for one or more time resource units in the "SCI combination" corresponding to the corresponding SCI combination ID is to be applied. Even when multiple pieces of side control information exist, one SCI combination ID is indicated, and the side control information corresponding to the indicated SCI combination ID is applied.

[0352] 5.3. Beam Indication and Corresponding Time Resource Indication in DCI

[0353] With DCI, signaling of aperiodic indication of access link beams and corresponding time resources can be supported for NCR.

[0354] For beam indication for a time resource on which a particular signal / channel is transmitted, the operation indicated in the DCI must be supported for a beam index and the time resource to which the beam is applied.

[0355] Meanwhile, an operation of indicating multiple beam indices and time resources to which each beam index is applied through one aperiodic beam indication should also be supported. When multiple signals / channels are forwarded sequentially, such as PDCCH-PDSCH-PUCCH transmission and PDCCH-PUSCH transmission, it is more efficient to signal the beam indication for the transmission resource of each channel at once rather than signaling it individually. In addition, such an operation is also useful when signals / channels for different terminals are transmitted through adjacent time resources.

[0356] Therefore, it must be possible to specify one or more beams and the time resource to which each beam is applied via aperiodic beam specification.

[0357] Unless otherwise specified by the base station, either explicitly or implicitly, NCR-Fwd is expected to always be OFF. Therefore, it is unnecessary to specify the OFF state for resources for which ON / OFF is not specified. Considering this, there is no need to support at least periodic / semi-persistent OFF state settings.

[0358] On the other hand, the need to change a time resource that has been determined to be ON periodically or semi-persistent to OFF requires the introduction of a dynamic OFF state indication.

[0359] Periodic / semi-persistent transmission may be cancelled, for example, when SPS PDSCH transmission is activated but not actually transmitted, when SRS transmission is not performed due to collision with PUSCH, when the transmission UL / DL direction of a signal / channel set semi-statically and UL / DL information determined by slot format determination collide, etc. If there is sufficient gain to be gained by dealing with such issues, it may be considered to support aperiodic indication for the OFF state and the time resource to which the OFF state is applied.

[0360] When dynamically indicating beam information and OFF state, the OFF state and beam index are not indicated simultaneously for the same time resource. Therefore, rather than indicating the OFF state independently of the beam information, the OFF state indication and beam indication can be combined to indicate the OFF state or a specific beam index according to the value of the DCI field for beam / OFF indication. For example, as shown in Table 17 below, if the value of the DCI field for beam / OFF indication is '0', it means the OFF state, and if it is another value, it means a specific beam index.

[0361] [Table 17]

[0362] At this time, each beam / OFF indication may correspond to one time resource indication, and for this purpose, for example, a beam / OFF indication field and a time resource indication field may exist as a pair.

[0363] FIG. 15 shows an example of a DCI field for an OFF indication combined with a beam indication (BEAM / OFF indication).

[0364] Referring to (a) of Figure 15, a DCI may include a plurality of (e.g., two) beam / OFF indication fields and a plurality of (e.g., two) time resource indication fields. Each beam / OFF indication field may be composed of K1 bits, and each time resource indication field may be composed of K2 bits.

[0365] For example, the fields may be arranged in the following order: first beam / OFF indication field, first time resource indication field, second beam / OFF indication field, and second time resource indication field.

[0366] In this case, beam / OFF instruction 1 indicated by the first beam / OFF instruction field can be applied to the time resource indicated by the first time resource instruction field (time resource instruction 1), and beam / OFF instruction 2 indicated by the second beam / OFF instruction field can be applied to the time resource indicated by the second time resource instruction field (time resource instruction 2).

[0367] That is, in order to support indication of beam and OFF states for multiple time resources via DCI, multiple beam / OFF indication fields and time resource indication fields may be present in the DCI.

[0368] Referring to (b) of FIG. 15, a DCI may include a plurality of (e.g., two) beam / OFF indication fields and a plurality of (e.g., two) time resource indication fields. Each beam / OFF indication field may be composed of K1 bits, and each time resource indication field may be composed of K2 bits. For example, the fields may be arranged in the following order: first beam / OFF indication field, second beam / OFF indication field, first time resource indication field, and second time resource indication field.

[0369] In this case, beam / OFF instruction 1 indicated by the first beam / OFF instruction field can be applied to the time resource indicated by the first time resource instruction field (time resource instruction 1), and beam / OFF instruction 2 indicated by the second beam / OFF instruction field can be applied to the time resource indicated by the second time resource instruction field (time resource instruction 2).

[0370] That is, in order to support indication of beam and OFF states for multiple time resources via DCI, multiple beam / OFF indication fields and time resource indication fields may be present in the DCI.

[0371] As shown in (a) and (b) of Figure 15, the beam / OFF indication field and the time resource indication field in the DCI can exist in a 1:1 relationship.

[0372] The beam / OFF instruction field in FIG. 15 may be replaced with a beam instruction field. The beam instruction field is a field that indicates a specific beam index, and a corresponding time resource instruction field exists. The beam indicated by the beam instruction field is applied to the time resource indicated by the corresponding time resource instruction field. In addition, the NCR-Fwd is in the ON state for the time resource indicated by the corresponding time resource instruction field. In this sense, the beam instruction field can be interpreted as indicating a specific beam and the ON state for the time resource indicated by the corresponding time resource instruction field.

[0373] In FIG. 15, K1 and K2 may be the same value or may be different values.

[0374] In order to support the indication of beam and OFF states for multiple time resources, multiple beam / OFF indication fields and time resource indication fields are required in the DCI indicating the side control information. At this time, each beam / OFF indication can be associated with a specific time resource indication. For this purpose, for example, there may be the same number of beam / OFF indication fields and time resource indication fields, and the beam / OFF indication 1 may be applied to the time resource indicated by the time resource indication 1, and the beam / OFF indication 2 may be applied to the time resource indicated by the time resource indication 2.

[0375] In this case, the DCI size may vary depending on the number of such fields. The NCR-MT needs to know the DCI size in order to monitor the DCI. To this end, the DCI length and the number of beam / OFF indication or time resource indication fields can be set by the RRC message / signal.

[0376] That is, in order to determine the length (number of bits, bit width) of the DCI indicating the side control information, at least one of the following information can be set in the NCR-MT from the base station. Such information can be signaled, for example, via an RRC signal / message.

[0377] Alt 1. Number of bits that make up DCI

[0378] Alt 2. Number of pairs of beam / OFF indication field and time resource indication field present in DCI

[0379] Alt 3. Number of beam / OFF indication fields or time resource indication fields present in DCI

[0380] Alt 4. Length of beam / OFF indication field or time resource indication field in DCI

[0381] Through such information, the NCR-MT can determine the length (number of bits) of the DCI indicating the side control information.

[0382] The DCI field for transmitting aperiodic side control information may include at least one of the following fields:

[0383] i) Beam / OFF indication field

[0384] A beam indication and an OFF state indication may be supported through aperiodic side control information. In this case, the beam indication and the OFF state indication may not be indicated separately, but may be indicated in combination through the beam / OFF indication field. For example, a value of the field may be '0' to indicate an OFF state, and other values ​​may indicate a specific beam index. To support indication of beams and OFF states for multiple time resources, multiple beam / OFF indication fields may exist in the DCI. The beam / OFF indication field may be referred to as a beam indication field. A time resource for which the beam indication field indicates a beam is in an ON state (e.g., a state in which the NCR-Fwd performs a transmission or reception operation on an access link), and the remaining time resources excluding the time resource (i.e., a time resource for which the beam indication field does not indicate a beam) are in an OFF state (e.g., a state in which the NCR-Fwd does not perform a transmission or reception operation on an access link).

[0385] ii) Time resource indication field

[0386] A time resource indication field is required to indicate the time resource to which the beam on / off indication applies. By indicating the position of the starting symbol and the symbol length through this field, it is possible to indicate a time resource consisting of consecutive symbols.

[0387] There may be multiple time resource indication fields to support indication of beam and OFF states for multiple time resources.

[0388] iii) HARQ-ACK for DCI related fields

[0389] As described above, in order to support HARQ-ACK feedback for side control information carried by the PDCCH, the DCI may include all or some of the following fields:

[0390] 1) Time domain resource assignment, 2) PDSCH-to-HARQ_feedback timing indicator, 3) PUCCH resource indicator, 4) Downlink assignment index.

[0391] FIG. 16 illustrates an operation method of NCR, including NCR-MT and NCR-Fwd, in a wireless communication system.

[0392] Referring to FIG. 16, the NCR receives downlink control information (DCI) from the base station via the NCR-MT (S161).

[0393] The DCI is, for example, DCI format 2_8, which indicates aperiodic beam direction for a list of time resources.

[0394] The following information can be transmitted via DCI format 2_8 together with the CRC scrambled by the NCR-RNTI:

[0395] i) Beam Indicator 1, Beam Indicator 2, ..., Beam Indicator N. The bit width of each beam indication field can be determined by higher layer parameters.

[0396] ii) Time resource indication 1, time resource indication 2, ..., time resource indication N. The bit width of each time resource indication field may be determined based on, for example, the length of the list that contains the time resources.

[0397] The N beam indications are sequentially associated with N time resource indications, where N can be determined by higher layer parameters.

[0398] That is, DCI is a L used to indicate beam information. maxbeam direction fields and T used to indicate time resources max and a time resource indication field. max and the above T max are natural numbers and have the same value as each other.

[0399] Said L max Each beam indication field of the L beam indication fields may indicate one beam index. max The bit width of each beam indication field of the beam indication fields can be set by a radio resource control (RRC) signal.

[0400] Said T max Each of the time resource indication fields may indicate one time resource.

[0401] Said L max Beam direction by beam direction fields and the T max The time resource indications by the time resource indication fields are mapped 1:1 in order.

[0402] According to an embodiment, a higher layer signal defining a list of a plurality of time resources may be further received, max A specific field of the time resource indication fields may indicate one of the plurality of time resources of the list, and a bit width of the specific field may be determined according to a length of the list.

[0403] Said T max can be set by a higher layer signal. The higher layer signal is, for example, a radio resource control (RRC) signal. max The value is RRC configurable.

[0404] The DCI is used for aperiodic beam indication for the access link.

[0405] The DCI may include multiple beam indication fields and time resource indication fields in various manners / orders as shown in FIG. 15.

[0406] The NCR operates on an access link via the NCR-Fwd based on the DCI (S162), where the access link refers to a link between the NCR-Fwd and a terminal.

[0407] For example, the T max The L max The NCR-MT can perform a forwarding operation of the access link by applying a beam indicated by the n-th beam indication field among the T max The L max The beam designated by the n-th beam designation field among the n beam designation fields is determined to be applied, and NCR-Fwd is controlled accordingly.

[0408] FIG. 17 illustrates a signaling process between a base station, an NCR, and a terminal in a wireless communication system.

[0409] Referring to FIG. 17, the base station sets T to the NCR-MT of the NCR including NCR-MT and NCR-Fwd. max The mobile station transmits a higher layer signal (RRC signal) informing the mobile station of the above (S171).

[0410] The base station transmits DCI including a beam indication field and a time resource indication field to the NCR-MT (S172). The DCI is for operation on the access link of the NCR-Fwd and can be transmitted to the NCR-MT via the PDCCH.

[0411] As mentioned above, DCI is a L used to indicate beam information. max beam direction fields and T used to indicate time resources max and a time resource indication field, max and the above T max are the same value.

[0412] The NCR (NCR-MT) can detect and decode the DCI based on the higher layer signal (S173). In order to detect / decode the DCI, the size (number of bits) of the DCI must be known. Since the number of beam indication fields and time resource indication fields included in the DCI can be known in advance from the higher layer signal, the DCI can be detected / decoded based on this.

[0413] The NCR performs an access link operation based on the DCI (S174). For example, the NCR can perform a forwarding operation by applying a beam indicated by a corresponding beam indication field in a time resource indicated by a time resource indication field included in the DCI. The NCR-Fwd is in an OFF state in a time resource where such a beam indication is not given.

[0414] According to the above-mentioned method, it is possible to minimize an increase in the bit size of the control information (DCI) for controlling the operation of the NCR-Fwd and to efficiently control the operation of the NCR-Fwd. Also, it is possible to flexibly execute dynamic beam instruction for the NCR-Fwd. Also, since the NCR-MT can know the size of the DCI for controlling the NCR-Fwd in advance, it is possible to easily execute detection of the DCI.

[0415] FIG. 18 illustrates a wireless device to which the present disclosure can be applied.

[0416] Referring to FIG. 18, a first wireless device 100 and a second wireless device 200 can transmit and receive wireless signals via various wireless access technologies (e.g., LTE, NR).

[0417] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and / or one or more antennas 108. The processor 102 is configured to control the memory 104 and / or the transceiver 106 to implement the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. For example, the processor 102 processes information in the memory 104 to generate a first information / signal, and then transmits a wireless signal including the first information / signal via the transceiver 106. The processor 102 also receives a wireless signal including a second information / signal via the transceiver 106, and then stores information obtained from signal processing of the second information / signal in the memory 104. The memory 104 is connected to the processor 102 and stores various information related to the operation of the processor 102. For example, the memory 104 stores software code including instructions for performing some or all of the processes controlled by the processor 102 or performing the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in this document. Here, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to realize a wireless communication technology (e.g., LTE, NR). The transceiver 106 is connected to the processor 102 and transmits and / or receives wireless signals via one or more antennas 108. The transceiver 106 includes a transmitter and / or a receiver. The transceiver 106 may be mixed with an RF (Radio Frequency) unit. In this disclosure, a wireless device may also mean a communication modem / circuit / chip.

[0418] The processor 102 may be included in a network-controlled repeater (NCR) including a mobile termination (NCR-MT) and a forwarding (NCR-Fwd). The processor 102 receives downlink control information (DCI) from a base station via the NCR-MT and operates on an access link via the NCR-Fwd based on the DCI. The DCI includes a link information (LIP) used to indicate beam information. max beam direction fields and T used to indicate time resources max and a time resource indication field, max and the above T max are the same value, and max can be set by a higher layer signal.

[0419] The second wireless device 200 includes one or more processors 202, one or more memories 204, and may additionally include one or more transceivers 206 and / or one or more antennas 208. The processor 202 is configured to control the memory 204 and / or the transceiver 206 to implement the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. For example, the processor 202 processes information in the memory 204 to generate a third information / signal, and then transmits a wireless signal including the third information / signal via the transceiver 206. The processor 202 also receives a wireless signal including a fourth information / signal via the transceiver 206, and then stores information obtained from the signal processing of the fourth information / signal in the memory 204. The memory 204 is connected to the processor 202 and stores various information related to the operation of the processor 202. For example, the memory 204 stores software code including instructions for performing some or all of the processes controlled by the processor 202 or performing the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed in this document. Here, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to realize a wireless communication technology (e.g., LTE, NR). The transceiver 206 is connected to the processor 202 and transmits and / or receives wireless signals via one or more antennas 208. The transceiver 206 includes a transmitter and / or a receiver. The transceiver 206 may be mixed with an RF unit. In this disclosure, a wireless device may also mean a communication modem / circuit / chip.

[0420] The processor 202 may be included in a base station. The processor 202 transmits downlink control information (DCI) to the NCR-MT of an NCR, including an NCR-MT and an NCR-Fwd. The DCI is for operation on an access link of the NCR-Fwd, and the DCI includes a link used to indicate beam information. max beam direction fields and T used to indicate time resources max and a time resource indication field, max and the above T maxare the same value. max is set via a higher layer signal.

[0421] The hardware elements of the wireless device 100, 200 are described in more detail below. Without being limited thereto, one or more protocol layers may be implemented by one or more processors 102, 202. For example, one or more processors 102, 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP, etc.). The one or more processors 102, 202 generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. The one or more processors 102, 202 generate messages, control information, data, or information according to the descriptions, functions, procedures, suggestions, methods, and / or operational flowcharts disclosed herein. The one or more processors 102, 202 generate and provide signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information to the one or more transceivers 106, 206 according to the functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein. The one or more processors 102, 202 receive signals (e.g., baseband signals) from the one or more transceivers 106, 206 and obtain the PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein.

[0422] The one or more processors 102, 202 may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. The one or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, the one or more processors 102, 202 may include 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). The one or more processors 102, 202 may be implemented by at least one computer readable medium (CRM) that includes instructions to be executed by at least one processor.

[0423] That is, the CRM receives downlink control information (DCI) from the base station via the NCR-MT of the NCR, which includes the NCR-MT and the NCR-Fwd, and operates on the access link via the NCR-Fwd based on the DCI. The DCI is a L used to indicate beam information. max beam direction fields and T used to indicate time resources max and a time resource indication field, max and the above T max are the same value, and max can be set by a higher layer signal.

[0424] The descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be implemented using firmware or software, which may be implemented to include modules, procedures, functions, etc. Firmware or software configured to execute the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be included in one or more processors 102, 202 or may be stored in one or more memories 104, 204 and executed by one or more processors 102, 202. The descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein may be implemented using firmware or software in the form of code, instructions and / or collections of instructions.

[0425] The one or more memories 104, 204 are coupled to the one or more processors 102, 202 and store various types of data, signals, messages, information, programs, code, instructions and / or commands. The one or more memories 104, 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media and / or combinations thereof. The one or more memories 104, 204 may be located internal and / or external to the one or more processors 102, 202. Additionally, the one or more memories 104, 204 may be coupled to the one or more processors 102, 202 via various techniques, such as wired or wireless connections.

[0426] The one or more transceivers 106, 206 transmit user data, control information, wireless signals / channels, etc., as referred to in the methods and / or operational flowcharts, etc., of this document to one or more other devices. The one or more transceivers 106, 206 receive user data, control information, wireless signals / channels, etc., as referred to in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts, etc., disclosed in this document from one or more other devices. For example, the one or more transceivers 106, 206 are connected to one or more processors 102, 202 to transmit and receive wireless signals. For example, the one or more processors 102, 202 control the one or more transceivers 106, 206 to transmit user data, control information, or wireless signals to one or more other devices. Also, the one or more processors 102, 202 control the one or more transceivers 106, 206 to receive user data, control information, or wireless signals from one or more other devices. Also, the one or more transceivers 106, 206 are connected to one or more antennas 108, 208, and the one or more transceivers 106, 206 are configured to transmit and receive user data, control information, radio signals / channels, etc., as referred to in the descriptions, functions, procedures, suggestions, methods and / or operational flowcharts disclosed herein, via the one or more antennas 108, 208. In this document, the one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). The one or more transceivers 106, 206 convert the received user data, control information, radio signals / channels, etc., from RF band signals to baseband signals for processing using one or more processors 102, 202. The one or more transceivers 106, 206 convert the user data, control information, radio signals / channels, etc., processed using one or more processors 102, 202, from baseband signals to RF band signals. To this end, one or more of the transceivers 106, 206 include (analog) oscillators and / or filters.

[0427] 19 shows an example of a signal processing module structure, where the signal processing can also be performed by the processor 102, 202 of FIG.

[0428] Referring to FIG. 19, a transmitting device (e.g., a processor, a processor and a memory, or a processor and a transceiver) in a terminal or base station may include a scrambler 301, a modulator 302, a layer mapper 303, an antenna port mapper 304, a resource block mapper 305, and a signal generator 306.

[0429] The transmitting device can transmit one or more codewords. The coded bits in each codeword are scrambled by the scrambler 301 and transmitted on a physical channel. A codeword is also called a data stream and is equivalent to a transport block, which is a data block provided by the MAC layer.

[0430] The scrambled bits are modulated into complex-valued modulation symbols by a modulator 302. The modulator 302 can modulate the scrambled bits according to a modulation scheme and place them into complex modulation symbols representing positions on a signal constellation. There is no restriction on the modulation scheme, and m-PSK (m-Phase Shift Keying) or m-QAM (m-Quadrature Amplitude Modulation) can be used to modulate the encoded data. The modulator is also called a modulation mapper.

[0431] The complex modulation symbols may be mapped onto one or more transmission layers by a layer mapper 303. The complex modulation symbols on each layer may be mapped by an antenna port mapper 304 for transmission on an antenna port.

[0432] The resource block mapper 305 can map the complex modulation symbols for each antenna port to appropriate resource elements within a virtual resource block allocated for transmission. The resource block mapper can map the virtual resource blocks to physical resource blocks according to an appropriate mapping scheme. The resource block mapper 305 can allocate the complex modulation symbols for each antenna port to appropriate subcarriers for multiplexing by user.

[0433] The signal generator 306 can generate a complex-valued time domain OFDM symbol signal by modulating the complex modulation symbols for each antenna port, i.e., antenna-specific symbols, into a specific modulation scheme, for example, an Orthogonal Frequency Division Multiplexing (OFDM) scheme. The signal generator can perform an Inverse Fast Fourier Transform (IFFT) on the antenna-specific symbols, and can insert a Cyclic Prefix (CP) into the time domain symbols on which the IFFT has been performed. The OFDM symbols are transmitted to a receiving device via each transmitting antenna after undergoing digital-to-analog conversion and frequency uplink conversion. The signal generator can include an IFFT module, a CP inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, and the like.

[0434] 20 shows another example of a signal processing module structure in a transmitting device, where the signal processing can be performed in a processor of the terminal / base station, such as processor 102, 202 in FIG.

[0435] Referring to FIG. 20, a transmitting device (e.g., a processor, a processor and a memory, or a processor and a transceiver) in a terminal or base station may include a scrambler 401, a modulator 402, a layer mapper 403, a precoder 404, a resource block mapper 405, and a signal generator 406.

[0436] For one codeword, the transmitting device can scramble the coded bits in the codeword by the scrambler 401 and then transmit the scrambled bits via a physical channel.

[0437] The scrambled bits are modulated into complex modulation symbols by a modulator 402. The modulator 402 can modulate the scrambled bits according to a predetermined modulation scheme and place them into complex modulation symbols representing positions on a signal constellation. There is no restriction on the modulation scheme, and pi / 2-BPSK (pi / 2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), m-QAM (m-Quadrature Amplitude Modulation), etc. can be used to modulate the encoded data.

[0438] The complex modulation symbols can be mapped to one or more transmission layers by the layer mapper 403 .

[0439] The complex modulation symbols on each layer may be precoded by the precoder 404 for transmission on the antenna port. Here, the precoder may perform precoding after performing transform precoding on the complex modulation symbols. Alternatively, the precoder may perform precoding without performing transform precoding. The precoder 404 processes the complex modulation symbols in a MIMO manner using multiple transmit antennas to output antenna-specific symbols, and distributes the antenna-specific symbols to the corresponding resource block mapper 405. The output z of the precoder 404 may be obtained by multiplying the output y of the layer mapper 403 by a NХM precoding matrix W. Here, N is the number of antenna ports, and M is the number of layers.

[0440] A resource block mapper 405 maps the demodulated modulation symbols for each antenna port to the appropriate resource elements within the allocated virtual resource block for transmission.

[0441] The resource block mapper 405 assigns the complex modulation symbols to appropriate subcarriers so that they can be multiplexed by user.

[0442] The signal generator 406 can generate a complex-valued time domain Orthogonal Frequency Division Multiplexing (OFDM) symbol signal by modulating the complex modulation symbol into a specific modulation scheme, for example, OFDM scheme. The signal generator 406 can perform an Inverse Fast Fourier Transform (IFFT) on an antenna-specific symbol, and can insert a Cyclic Prefix (CP) into the time domain symbol on which the IFFT has been performed. The OFDM symbol is transmitted to a receiving device through each transmitting antenna after undergoing digital-to-analog conversion and frequency uplink conversion. The signal generator 406 can include an IFFT module, a CP inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, and the like.

[0443] The signal processing process of the receiver can be configured as the reverse of the signal processing process of the transmitter. Specifically, the processor of the receiver performs decoding and demodulation of wireless signals received externally through the antenna port(s) of the transceiver. The receiver can include a plurality of multiple receive antennas, and each of the signals received through the receive antennas is restored to a baseband signal, and then multiplexed and MIMO demodulated to restore the data sequence originally intended to be transmitted by the transmitter. The receiver 1820 can include a signal restorer for restoring the received signal to a baseband signal, a multiplexer for combining and multiplexing the received and processed signals, and a channel demodulator for demodulating the multiplexed signal sequence to a corresponding codeword. The signal restorer, multiplexer, and channel demodulator can be configured as an integrated module performing these functions or as independent modules. More specifically, the signal restorer may include an analog-to-digital converter (ADC) for converting an analog signal into a digital signal, a CP remover for removing CP from the digital signal, an FFT module for applying a fast Fourier transform (FFT) to the CP-removed signal to output a frequency domain symbol, and a resource element demapper / equalizer for restoring the frequency domain symbol to an antenna-specific symbol. The antenna-specific symbol is restored to a transmission layer by a multiplexer, and the transmission layer is restored to a codeword intended to be transmitted by a transmitting device by a channel demodulator.

[0444] FIG. 21 illustrates an example of a wireless communication device according to an embodiment of the present disclosure.

[0445] 21, a wireless communication device, for example, a terminal, may include at least one of a processor 2310 such as a digital signal processor (DSP) or a microprocessor, a transceiver 2335, a power management module 2305, an antenna 2340, a battery 2355, a display 2315, a keypad 2320, a GPS (Global Positioning System) chip 2360, a sensor 2365, a memory 2330, a SIM (Subscriber Identification Module) card 2325, a speaker 2345, and a microphone 2350. There may be a plurality of antennas and processors.

[0446] The processor 2310 may implement the functions, procedures, and methods described herein. The processor 2310 of FIG. 21 is the processor 102, 202 of FIG.

[0447] The memory 2330 is coupled to the processor 2310 and stores information related to the operation of the processor. The memory may be located inside or outside the processor and may be coupled to the processor via various techniques, such as a wired or wireless connection. The memory 2330 of FIG. 21 is the memory 104, 204 of FIG. 18.

[0448] A user may enter various types of information, such as a telephone number, using various techniques, such as pressing buttons on the keypad 2320 or voice activation using the microphone 2350. The processor 2310 may receive and process the user's information to perform the appropriate function, such as calling the entered telephone number. In some scenarios, data may be retrieved from the SIM card 2325 or memory 2330 to perform the appropriate function. In some scenarios, the processor 2310 may display various types of information and data on the display 2315 for the user's convenience.

[0449] The transceiver 2335 is coupled to the processor 2310 and transmits and / or receives wireless signals, such as radio frequency (RF) signals. The processor can initiate communication or control the transceiver to transmit wireless signals containing various types of information or data, such as voice communication data. The transceiver includes a transmitter and a receiver for transmitting and receiving wireless signals. An antenna 2340 can facilitate the transmission and reception of wireless signals. In some embodiments, upon receiving a wireless signal, the transceiver can forward and convert the signal to a baseband frequency for processing by the processor. The processed signal can be processed by various techniques, such as being converted to audible or readable information for output via a speaker 2345. The transceiver of FIG. 33 is the transceiver 106, 206 of FIG. 30.

[0450] Although not shown in Fig. 21, various components such as a camera, a Universal Serial Bus (USB) port, etc. may be additionally included in the terminal. For example, the camera may be connected to the processor 2310.

[0451] Fig. 21 is merely one embodiment of a terminal, and the embodiment is not limited thereto. The terminal does not necessarily include all elements of Fig. 21. That is, some components, such as the keypad 2320, the GPS (Global Positioning System) chip 2360, the sensor 2365, the SIM card 2325, etc., may not be essential elements, and in this case, may not be included in the terminal.

[0452] FIG. 22 illustrates another example of a wireless device.

[0453] Referring to FIG. 22, a wireless device may include at least one processor 102,202, at least one memory 104,204, at least one transceiver 106,206, and one or more antennas 108,208.

[0454] The difference between the example of the wireless device described in Fig. 18 and the example of the wireless device in Fig. 22 is that the processors 102, 202 and the memories 104, 204 are separate in Fig. 18, but the memories 104, 204 are included in the processors 102, 202 in the example of Fig. 22. In other words, the processor and the memory can be configured as a single chipset.

[0455] 23 illustrates another example of a wireless device to which the present disclosure is applied. The wireless device may be embodied in various forms depending on the use case / service.

[0456] 23, the wireless device 100, 200 may correspond to the wireless device of FIG. 18 and may be configured with various elements, components, units, and / or modules. For example, the wireless device 100, 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140. The communication unit may include a communication circuit 112 and a transceiver(s) 114. For example, the communication circuit 112 may include one or more processors 102, 202 and / or one or more memories 104, 204. For example, the transceiver(s) 114 may include one or more transceivers 106, 206 and / or one or more antennas 108, 208 of FIG. 18. The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 to control various operations of the wireless device. For example, the control unit 120 can control electrical / mechanical operations of the wireless device based on the programs / codes / instructions / information stored in the memory unit 130. In addition, the control unit 120 can transmit information stored in the memory unit 130 to an outside (e.g., another communication device) via a wireless / wired interface via the communication unit 110, or store information received from an outside (e.g., another communication device) via the communication unit 110 via a wireless / wired interface in the memory unit 130.

[0457] The additional element 140 may be configured in various ways depending on the type of wireless device. For example, the additional element 140 may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Without being limited thereto, the wireless device may be embodied in the form of a robot (100a in FIG. 24), a vehicle (100b-1 and 100b-2 in FIG. 24), an XR device (100c in FIG. 24), a mobile device (100d in FIG. 24), a home appliance (100e in FIG. 24), an IoT device (100f in FIG. 24), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a Fintech device (or a financial device), a security device, a climate / environment device, an AI server / device (400 in FIG. 24), a base station (200 in FIG. 24), a network node, or the like. The wireless device may be mobile or fixed depending on the use case / service.

[0458] In FIG. 23, various elements, components, units / parts, and / or modules in the wireless devices 100 and 200 may be interconnected entirely through a wired interface, or at least some of them may be wirelessly connected through the communication unit 110. For example, in 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, 140) may be wirelessly connected through the communication unit 110. Also, each element, component, unit / part, and / or module in the wireless devices 100 and 200 may further include one or more elements. For example, the control unit 120 may be configured with a set of one or more processors. For example, the control unit 120 may be configured with a set of a communication control processor, an application processor, an ECU (Electronic Control Unit), a graphics processor, a memory control processor, etc. As another example, the memory unit 130 may be composed of a Random Access Memory (RAM), a Dynamic RAM (DRAM), a Read Only Memory (ROM), a flash memory, a volatile memory, a non-volatile memory, and / or a combination thereof.

[0459] FIG. 24 illustrates a communication system 1 to which the present specification is applied.

[0460] Referring to FIG. 24, the communication system 1 applied to this specification includes a wireless device, a base station, and a network. Here, the wireless device means a device that performs communication using a wireless connection technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)), and is also called a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot 100a, a vehicle 100b-1, 100b-2, an XR (eXtended Reality) device 100c, a handheld device (Hand-held device) 100d, a home appliance 100e, an IoT (Internet of Thing) device 100f, and an AI device / server 400. For example, the vehicle may include a vehicle equipped with a wireless communication function, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, and the like. Here, the vehicle may include a UAV (Unmanned Aerial Vehicle) (e.g., a drone). The XR devices include Augmented Reality (AR) / Virtual Reality (VR) / Mixed Reality (MR) devices, and may be embodied in the form of a Head-Mounted Device (HMD), a Head-Up Display (HUD) installed in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, etc. The mobile devices may include a smartphone, a smart pad, a wearable device (e.g., a smart watch, a smart glasses), a computer (e.g., a notebook, etc.), etc. The home appliances may include a TV, a refrigerator, a washing machine, etc. The IoT devices may include a sensor, a smart meter, etc. For example, a base station or a network may be embodied as a wireless device, and a specific wireless device 200a may operate as a base station / network node for other wireless devices.

[0461] The wireless devices 100a to 100f may be connected to a network 300 via a base station 200. An AI (Artificial Intelligence) technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to an 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. The wireless devices 100a to 100f may communicate with each other via the base station 200 / network 300, but may also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, the vehicles 100b-1 and 100b-2 may communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Furthermore, an IoT device (eg, a sensor) can directly communicate with other IoT devices (eg, sensors) or other wireless devices 100a to 100f.

[0462] Wireless communications / connections 150a, 150b, and 150c may be established between the wireless devices 100a to 100f and the base station 200, and between the base stations 200 and 200. Here, the wireless communication / connection may be performed via various wireless connection technologies (e.g., 5G NR) such as uplink / downlink communication 150a and sidelink communication 150b (or D2D communication) and communication between base stations 150c (e.g., relay, IAB (Integrated Access Backhaul)). Through the wireless communication / connection 150a, 150b, 150c, the wireless device and the base station / wireless device, and the base station and the base station may transmit / receive wireless signals to each other. For example, the wireless communication / connection 150a, 150b, 150c may transmit / receive signals via various physical channels. To this end, based on various proposals in the present specification, at least some of various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / de-mapping, etc.), resource allocation processes, etc. may be performed.

[0463] Meanwhile, NR supports multiple numerologies (or subcarrier spacing (SCS)) to support various 5G services. For example, a 15 kHz SCS supports wide areas in traditional cellular bands, a 30 kHz / 60 kHz SCS supports dense-urban, lower latency, and wider carrier bandwidth, and a 60 kHz or higher SCS supports bandwidths larger than 24.25 GHz to overcome phase noise.

[0464] The NR frequency band can be defined as two types of frequency ranges (FR1, FR2). The values ​​of the frequency ranges can be changed, for example, the frequency ranges of the two types (FR1, FR2) are as shown in Table 18 below. For convenience of explanation, among the frequency ranges used in the NR system, FR1 can mean "sub 6GHz range" and FR2 can mean "above 6GHz range" and can be called millimeter wave (mmW).

[0465] [Table 18]

[0466] As described above, the values ​​of the frequency range of the NR system may be changed. For example, FR1 may include a band of 410 MHz to 7125 MHz as shown in Table 19 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher. For example, the frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher included in FR1 may include an unlicensed band. The unlicensed band may be used for various purposes, for example, for communication for vehicles (e.g., autonomous driving).

[0467] [Table 19]

[0468] The claims described herein may be combined in various ways, for example, the technical features of the method claims herein may be combined and implemented in an apparatus, the technical features of the apparatus claims herein may be combined and implemented in a method, the technical features of the method claims herein and the technical features of the apparatus claims herein may be combined and implemented in an apparatus, and the technical features of the method claims herein and the technical features of the apparatus claims herein may be combined and implemented in a method.

Claims

1. In a wireless communication system, a network-controlled repeater (NCR) operation method including a network-controlled repeater (NCR)-mobile termination (MT) and an NCR-forwarding (NCR-Fwd) is provided, Receive downlink control information (DCI) from a base station via the NCR-MT; Operates on an access link via the NCR-Fwd based on the DCI; The DCI is a L used to indicate beam information. ｍａｘ A beam indication field and a time resource indication field T ｍａｘ a time resource indication field; ｍａｘ and the above T ｍａｘ are natural numbers and are equal to each other, Said T ｍａｘ is set by a higher layer signal.

2. The method of claim 1, wherein the DCI is used for aperiodic beam indication for the access link.

3. Said L ｍａｘ 2. The method of claim 1, wherein each beam designation field of the beam designation fields indicates one beam index.

4. Said T ｍａｘ The method of claim 1 , wherein each of the time resource indication fields indicates one time resource.

5. Said L ｍａｘ Beam direction by beam direction fields and the T ｍａｘ The method of claim 1 , wherein the time resource indications by the time resource indication fields are mapped 1:1 in order.

6. 2. The method of claim 1, further comprising receiving an upper layer signal defining a list of a plurality of time resources.

7. Said T ｍａｘ The method of claim 6 , wherein a particular one of the time resource indication fields indicates one of the plurality of time resources in the list.

8. The method of claim 1, wherein the higher layer signal is a radio resource control (RRC) signal.

9. 2. The method according to claim 1, wherein the access link is a link between the NCR-Fwd and a terminal.

10. Said T ｍａｘ The L ｍａｘ 2. The method according to claim 1, wherein a beam indicated by an n-th beam indicating field is applied among the n beam indicating fields.

11. Said L ｍａｘ The method of claim 1 , wherein a bit width of each of the beam direction fields is set by a radio resource control (RRC) signal.

12. NCR (network-controlled repeater) including NCR-MT (mobile termination) and NCR-Fwd (forwarding), At least one transceiver; At least one memory; at least one processor operatively coupled to the at least one memory and the at least one transceiver, the at least one processor comprising: Receive downlink control information (DCI) from a base station via the NCR-MT; Operates on an access link via the NCR-Fwd based on the DCI; The DCI is a L used to indicate beam information. ｍａｘ A beam indication field and a time resource indication field T ｍａｘ a time resource indication field; ｍａｘ and the above T ｍａｘ are natural numbers and are equal to each other, Said T ｍａｘ is set by a higher layer signal.

13. The NCR of claim 12, wherein the DCI is used for aperiodic beam indication for the access link.

14. Said L ｍａｘ The NCR of claim 12, wherein each beam instruction field of the beam instruction fields indicates one beam index.

15. Said T ｍａｘ The NCR of claim 12, wherein each of the time resource indication fields indicates one time resource.

16. Said L ｍａｘ Beam direction by beam direction fields and the T ｍａｘ The NCR of claim 12, wherein the time resource indications according to the time resource indication fields are mapped 1:1 in order.

17. The NCR of claim 12, further comprising receiving an upper layer signal defining a list of a plurality of time resources.

18. Said T ｍａｘ The NCR of claim 17, wherein a specific field of the time resource indication fields indicates one of the plurality of time resources in the list.

19. The NCR of claim 12, wherein the higher layer signal is a radio resource control (RRC) signal.

20. The NCR according to claim 12, characterized in that the access link is a link between the NCR-Fwd and a terminal.

21. Said T ｍａｘ The L ｍａｘ The NCR according to claim 12, wherein a beam indicated by an n-th beam indicating field among the n beam indicating fields is applied.

22. Said L ｍａｘ The NCR of claim 12, wherein a bit width of each of the beam instruction fields is set by a radio resource control (RRC) signal.

23. NCR devices include network-controlled repeater (NCR)-MT (mobile termination) and NCR-Fwd (forwarding). At least one memory; at least one processor operatively coupled to the at least one memory, the at least one processor comprising: Receive downlink control information (DCI) from a base station via the NCR-MT; Operates on an access link via the NCR-Fwd based on the DCI; The DCI is a L used to indicate beam information. ｍａｘ A beam indication field and a time resource indication field T ｍａｘ a time resource indication field; ｍａｘ and the above T ｍａｘ are natural numbers and are equal to each other, Said T ｍａｘ is set by a higher layer signal.

24. At least one computer readable medium (CRM) including instructions to be executed by at least one processor, receiving downlink control information (DCI) from a base station via a network-controlled repeater (NCR)-MT (mobile termination) of an NCR including a network-controlled repeater (NCR)-MT and a forwarding (NCR-Fwd); and operating on an access link via the NCR-Fwd based on the DCI; The DCI is a L used to indicate beam information. ｍａｘ A beam indication field and a time resource indication field T ｍａｘ a time resource indication field; ｍａｘ and the above T ｍａｘ are natural numbers and are equal to each other, Said T ｍａｘ The CRM is characterized in that it is set by a higher layer signal.

25. 1. A method of operating a base station in a wireless communication system, comprising: Sending downlink control information (DCI) to the NCR-MT of the NCR including a network-controlled repeater (NCR)-MT and a forwarding (NCR-Fwd); The DCI is for operation on an access link of the NCR-Fwd, The DCI is a L used to indicate beam information. ｍａｘ A beam indication field and a time resource indication field T ｍａｘ a time resource indication field; ｍａｘ and the above T ｍａｘ are natural numbers and are equal to each other, Said T ｍａｘ is set via a higher layer signal.

26. The base station is At least one transceiver; At least one memory; and at least one processor operatively coupled to the at least one memory and the transceiver, the at least one processor comprising: Sending downlink control information (DCI) to the NCR-MT of the NCR including a network-controlled repeater (NCR)-MT and a forwarding (NCR-Fwd); The DCI is for operation on an access link of the NCR-Fwd, The DCI is a L used to indicate beam information. ｍａｘ A beam indication field and a time resource indication field T ｍａｘ a time resource indication field; ｍａｘ and the above T ｍａｘ are natural numbers and are equal to each other, Said T ｍａｘ A base station characterized in that the base station is configured via a higher layer signal.

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