Method for operating device in wireless communication system and device using same

Abstract

An operation method and apparatus of an NCR in a wireless communication system are provided. The NCR receives a control message related to a beam indication for accessing a link from a base station, and performs a forwarding operation based on the control message. The control message includes a list of forwarding resources for forwarding operations. Each forwarding resource included in the list is defined as a beam index and a time resource.

Description

Technical Field

[0001] The present disclosure relates to an operation method of a device in a wireless communication system and a device utilizing the method. Background Art

[0002] As more and more communication devices require higher communication capacity, advanced mobile broadband communication is needed compared to existing radio access technologies (RATs). Large-scale machine type communication (MTC), which provides various services anytime and anywhere by connecting multiple devices and multiple objects, is also a major issue to be considered in the next generation of communications. In addition, the design of communication systems considering services or user equipment (UE) that are sensitive to reliability and latency is under discussion. The introduction of next-generation RATs that consider enhanced mobile broadband communications, massive MTC, and ultra-reliable low latency communications (URLLC), etc., is under discussion. In the present disclosure, for the convenience of description, this technology may be referred to as a new RAT or a new radio (NR).

[0003] On the other hand, repeaters (also called relays) can also be introduced in NR. However, in the case of existing conventional repeaters, when forwarding, beamforming is not performed or beamforming is only performed in one direction. In this case, the signal is forwarded in other directions instead of in the direction where the UE is located, which will cause unnecessary interference to other UEs. In addition, compared with the case where beamforming is performed for the target UE, greater power consumption will be generated. Summary of the invention

[0004] Technical issues

[0005] The technical problem to be solved by the present disclosure is to provide an operating method of a device in a wireless communication system and a device using the method.

[0006] Means of solving problems

[0007] Provided is an operation method and apparatus of a network control repeater (NCR) including a network control repeater (NCR)-mobile terminal (MT) and NCR-Fwd (forwarding) in a wireless communication system. The NCR receives a control message related to a beam indication for an access link between the NCR-Fwd and a UE from a base station through the NCR-MT, and performs a forwarding operation based on the control message and through the NCR-Fwd. At this time, the control message includes a list of forwarding resources capable of performing the forwarding operation, and each forwarding resource included in the list is defined as a beam index and a time resource.

[0008] Effects of the Invention

[0009] According to the present disclosure, NCR uses appropriate beams to forward signals to or receive signals from UE according to time resources. That is, NCR applies beams configured according to various time resources to perform forwarding operations. As a result, interference to other devices that are not the target device can be reduced.

[0010] In addition, compared with a case where beamforming is not used, a forwarding operation can be efficiently performed while consuming less power. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The system structure of the next generation radio access network (NG-RAN) to which NR is applied is illustrated.

[0012] Figure 2 is a diagram illustrating a radio protocol architecture for a user plane.

[0013] Figure 3 is a diagram illustrating a wireless protocol architecture for a control plane.

[0014] Figure 4 Illustrate the functional division between NG-RAN and 5GC.

[0015] Figure 5 An example of a frame structure that can be applied in NR is illustrated.

[0016] Figure 6 The time slot structure of the NR frame is illustrated.

[0017] Figure 7 CORESET is instantiated.

[0018] Figure 8 An example of a frame structure for a new radio access technology is illustrated.

[0019] Fig. 9 The structure of a self-contained time slot is illustrated.

[0020] Fig.10 Physical channels and general signal transmission are illustrated.

[0021] Fig.11 The transport network architecture for 5G is illustrated.

[0022] Fig.12 An example of a topology in which NCR performs transmission and reception between a base station and a UE is shown.

[0023] Fig.13 is a diagram comparing the operation of NCR and existing RF repeaters.

[0024] Fig.14The links between the base station, NCR and UE are illustrated.

[0025] Fig.15 An example of defining time resources associated with beam indices is shown.

[0026] Fig.16 A semi-static access link beam configuration is illustrated.

[0027] Fig.17 is an example of dynamic access link beam indication.

[0028] Fig.18 An operation method of a Network Controlled Repeater (NCR) including a NCR-Mobile Terminal (MT) and a NCR-Fwd (Forwarding) in a wireless communication system is illustrated.

[0029] Fig.19 An operation method of a base station in a wireless communication system is illustrated.

[0030] Fig. 20 A wireless device applied to this specification is exemplified.

[0031] Fig.21 An example of a signal processing module structure is shown.

[0032] Fig. 22 Another example of a signal processing module structure is shown.

[0033] Fig.23 An example of a wireless communication device according to an implementation of the present disclosure is shown.

[0034] Fig.24 Another example of a wireless device is shown.

[0035] Fig.25 Another example of a wireless device applied to the present specification is shown.

[0036] Fig.26 The communication system 1 applied to this specification is exemplified. DETAILED DESCRIPTION

[0037] In this specification, "A or B" may mean "only A", "only B", 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 "only A", "only B", "only C", or "any combination of A, B, C".

[0038] A slash ( / ) or a comma used in this specification may mean "and / or". For example, "A / B" may mean "A and / or B". Thus, "A / B" may mean "only A", "only B", or "both A and B". For example, "A, B, C" may mean "A, B, or C".

[0039] In the present specification, "at least one of A and B" may mean "only A", "only B", or "both A and B". In addition, in the present specification, the expression "at least one of A or B" or "at least one of A and / or B" may be interpreted as "at least one of A and B".

[0040] In addition, in the present specification, "at least one of A, B, and C" may mean "only A", "only B", "only C", or "any combination of A, B, and C". In addition, "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".

[0041] In addition, brackets used in this specification may mean "for example". Specifically, when indicated as "control information (PDCCH)", this may mean that "PDCCH" is proposed as an example of "control information". In other words, the "control information" of this specification is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". Specifically, when indicated as "control information (ie, PDCCH)", this may also mean that "PDCCH" is proposed as an example of "control information".

[0042] The technical features described separately in one drawing in this specification may be implemented separately or simultaneously.

[0043] A wireless communication system to which the present disclosure may be applied may also be referred to as, for example, an Evolved-UMTS Terrestrial Radio Access Network (E-UTRAN) or a Long Term Evolution (LTE) / LTE-A system.

[0044] E-UTRAN includes a base station (BS) that provides a control plane and a user plane to a user equipment (UE). A UE may be fixed or mobile and may be referred to as another term such as a mobile station (MS), a user terminal (UT), a subscriber station (SS), a mobile terminal (MT), a wireless device, a terminal, etc. A BS is generally a fixed station that communicates with a UE and may be referred to as another term such as an evolved Node B (eNB), a base transceiver system (BTS), an access point, etc.

[0045] The BSs are interconnected via an X2 interface. The BSs are also connected to an Evolved Packet Core (EPC) via an S1 interface, more specifically, to a Mobility Management Entity (MME) via S1-MME and to a Serving Gateway (S-GW) via S1-U.

[0046] EPC includes MME, S-GW and Packet Data Network Gateway (P-GW). MME has UE access information or UE capability information, which is usually used for UE mobility management. S-GW is a gateway with E-UTRAN as the endpoint. P-GW is a gateway with PDN as the endpoint.

[0047] As more and more communication devices require more communication capacity, mobile broadband communication that is improved over existing radio access technologies is needed. In addition, large-scale machine type communication (MTC) that provides various services by connecting many devices and objects is one of the main issues to be considered in the next generation of communications. In addition, the design of communication systems considering reliability / latency-sensitive services / UEs is being discussed. The introduction of next-generation radio access technologies that consider enhanced mobile broadband communications (eMBB), massive MTC (mMTC), and ultra-reliable low latency communications (URLLC) is discussed. In the present disclosure, for convenience, this new technology may be referred to as a new radio access technology (new RAT or NR).

[0048] Figure 1 The system structure of the next generation radio access network (NG-RAN) to which NR is applied is illustrated.

[0049] Reference Figure 1 , the NG-RAN may include gNBs and / or eNBs that provide user plane and control plane protocol terminations to the UE. Figure 1 The case where only gNB is included is illustrated. gNB (eNB) is connected to each other through the Xn interface. The gNB and eNB are connected to the 5G core network (5GC) via the NG interface. More specifically, the gNB and eNB are connected to the access and mobility management function (AMF) via the NG-C interface, and are connected to the user plane function (UPF) via the NG-U interface.

[0050] On the other hand, the layers of the radio interface protocol between the UE and the network can be divided into the first layer (L1), the second layer (L2), and the third layer (L3) based on the lower three layers of the open system interconnection (OSI) model well known in the communication system. Among them, the physical (PHY) layer belonging to the first layer provides an information transmission service using a physical channel, and the radio resource control (RRC) layer belonging to the third layer is used to control radio resources between the UE and the network. To this end, the RRC layer exchanges RRC messages between the UE and the BS.

[0051] Figure 2 is a diagram illustrating a radio protocol architecture for a user plane. Figure 3 is a diagram showing a wireless protocol architecture for a control plane. The user plane is a protocol stack for user data transmission. The control plane is a protocol stack for control signal transmission.

[0052] Reference Figure 2 and Figure 3 , the PHY layer provides information transfer services to the upper layer through a physical channel. The PHY layer is connected to the medium access control (MAC) layer, which is the upper layer of the PHY layer, through a transport channel. Data is transmitted between the MAC layer and the PHY layer through the transport channel. The transport channel is classified according to how data is transmitted through the radio interface and the characteristics of the data.

[0053] Data moves between different PHY layers (ie, a PHY layer of a transmitter and a PHY layer of a receiver) through a physical channel. The physical channel may be modulated according to an Orthogonal Frequency Division Multiplexing (OFDM) scheme and use time and frequency as radio resources.

[0054] The functions of the MAC layer include mapping between logical channels and transport channels and multiplexing and demultiplexing into transport blocks provided on transport channels of MAC service data units (SDUs) belonging to logical channels through physical channels. The MAC layer provides services to the radio link control (RLC) layer through logical channels.

[0055] The functions of the RLC layer include concatenation, segmentation, and reassembly of RLC SDUs. In order to ensure various types of quality of service (QoS) required by radio bearers (RBs), the RLC layer provides three types of operation modes: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[0056] The RRC layer is defined only on the control plane. The RRC layer is associated with the configuration, reconfiguration, and release of radio bearers, and is responsible for the control of logical channels, transport channels, and PHY channels. RB represents a logical route provided by the first layer (PHY layer) and the second layer (MAC layer, RLC layer, and PDCP layer) to transmit data between the UE and the network.

[0057] The functions of the Packet Data Convergence Protocol (PDCP) layer on the user plane include the transmission of user data and header compression and encryption. The functions of the PDCP layer on the user plane also include the transmission and encryption / integrity protection of control plane data.

[0058] Configuration of RB means the process of defining the characteristics of the radio protocol layer and the channel in order to provide a specific service and configuring various detailed parameters and operation methods. RB can be divided into two types: signaling RB (SRB) and data RB (DRB). SRB is used as a channel through which RRC messages are sent on the control plane, and DRB is used as a channel through which user data is sent on the user plane.

[0059] If an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected state. Otherwise, the UE is in the RRC idle state.

[0060] The downlink transmission channels used to send data from the network to the UE include a broadcast channel (BCH) for sending system information and a downlink shared channel (SCH) for sending user traffic or control messages. Traffic or control messages for downlink multicast or broadcast services can be sent through the downlink SCH, or can be sent through another downlink multicast channel (MCH). In addition, the uplink transmission channels used to send data from the UE to the network include a random access channel (RACH) for sending initial control messages and an uplink shared channel (SCH) for sending user traffic or control messages.

[0061] Logical channels located above and mapped to the transport channels include a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH) and a multicast traffic channel (MTCH).

[0062] A physical channel includes multiple OFDM symbols in the time domain and multiple subcarriers in the frequency domain. A subframe includes multiple OFDM symbols in the time domain. RB is a resource allocation unit, including multiple OFDM symbols and multiple subcarriers. In addition, each subframe may use a specific subcarrier of a specific OFDM symbol (e.g., the first OFDM symbol) of the corresponding subframe for a physical downlink control channel (PDCCH), i.e., an L1 / L2 control channel. A transmission time interval (TTI) is a unit time for subframe transmission.

[0063] Figure 4 Illustrate the functional division between NG-RAN and 5GC.

[0064] Reference Figure 4, gNB can provide functions such as inter-cell radio resource management (inter-cell RRM), radio bearer management (RB control), connection mobility control, radio admission control, measurement configuration and provision, dynamic resource allocation, etc. AMF can provide functions such as NAS security, idle state mobility processing, etc. UPF can provide functions such as mobility anchoring, PDU processing, etc. SMF can provide functions such as UE IP address assignment, PDU session control, etc.

[0065] Figure 5 An example of a frame structure that can be applied in NR is illustrated.

[0066] Reference Figure 5 , a radio frame (hereinafter referred to as a frame) can be used for uplink and downlink transmission in NR. A frame has a length of 10ms and can be defined as two 5ms half-frames (Half-Frame, HF). A half-frame can be defined as five 1ms subframes (Subframe, SF). A subframe can be divided into one or more time slots, and the number of time slots in a subframe depends on the subcarrier spacing (SCS). Each time slot includes 12 or 14 OFDM (A) symbols according to a cyclic prefix (CP). When a normal CP is used, each time slot includes 14 symbols. When an extended CP is used, each time slot includes 12 symbols. Here, a symbol may include an OFDM symbol (or CP-OFDM symbol) and an SC-FDMA symbol (or DFT-s-OFDM symbol).

[0067] The following Table 1 illustrates a subcarrier spacing configuration (also referred to as a subcarrier spacing configuration) μ.

[0068] [Table 1]

[0069]

[0070] Table 2 below illustrates the number of time slots (N) in a frame according to the subcarrier spacing configuration μ. frame,μ slot ), the number of time slots in a subframe (N subframe,μ slot ), the number of symbols in a time slot (N slot symb )wait.

[0071] [Table 2]

[0072]

[0073] exist Figure 5 In FIG. 1 , μ=0, 1, 2, and 3 are exemplified.

[0074] The following Table 2-1 illustrates that the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary according to SCS when extended CP is used.

[0075] [Table 2-1]

[0076] <![CDATA[SCS(15·2 μ )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,μ slot ]]> <![CDATA[N subframe,μ slot ]]> 60KHz(μ=2) 12 40 4

[0077] In the NR system, OFDM (A) parameter sets (e.g., SCS, CP length, etc.) may be configured differently between multiple cells merged into one UE. Therefore, the (absolute time) duration of time resources (e.g., SF, time slot, or TTI) (collectively referred to as time unit (TU) for simplicity) consisting of the same number of symbols may be configured differently between the merged cells.

[0078] Figure 6 The time slot structure is illustrated.

[0079] A time slot may include multiple symbols in the time domain. For example, in the case of a normal CP, a time slot may include 14 symbols (or 7 symbols), but in the case of an extended CP, a time 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 consecutive (P) RBs in the frequency domain and may correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., 5) BWPs. Data communication is performed through an activated BWP, and only one BWP may be activated for one UE. Each element in a resource grid is called a resource element (RE), and a complex symbol may be mapped to an RE.

[0080] The physical downlink control channel (PDCCH) may include one or more control channel elements (CCEs) as illustrated in Table 3 below.

[0081] [Table 3]

[0082] Aggregation Level Number of CCEs 1 1 2 2 4 4 8 8 16 16

[0083] That is, the PDCCH may be transmitted through resources including 1, 2, 4, 8, or 16 CCEs. Here, the CCE includes six resource element groups (REGs), and one REG includes one resource block in the frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in the time domain.

[0084] Monitoring means decoding each PDCCH candidate according to the Downlink Control Information (DCI) format.The UE monitors a set of PDCCH candidates in one or more CORESETs (described below) on the activated DLBWP of each activated serving cell configured with PDCCH monitoring according to the corresponding search space set.

[0085] A new unit called Control Resource Set (CORESET) may be introduced in NR. The UE may receive PDCCH in the CORESET.

[0086] Figure 7 CORESET is instantiated.

[0087] Reference Figure 7 , CORESET includes N in the frequency domain CORESET RB resource blocks and N in the time domain CORESET symb ∈{1,2,3} symbols. N may be provided by the base station via higher layer signaling CORESET RB and N CORESET symb .like Figure 7 As illustrated in the example, a COR ESET may include multiple CCEs (or REGs).

[0088] The UE may attempt to detect a PDCCH in units of 1, 2, 4, 8, or 16 CCEs in a CORESET. One or more CCEs for which PDCCH detection may be attempted may be referred to as PDCCH candidates.

[0089] Multiple CORESETs can be configured for a UE.

[0090] The control region in a conventional wireless communication system (e.g., LTE / LTE-A) is configured over the entire system frequency band for use by a base station (BS). All UEs except some UEs (e.g., eMTC / NB-IoT UEs) that only support narrowband must be able to receive wireless signals over the entire system frequency band of the BS in order to properly receive / decode control information sent by the BS.

[0091] On the other hand, in NR, the above-mentioned CORESET is introduced. CORESET is a radio resource for control information to be received by UE, and can use only a part in the frequency domain instead of the entire system bandwidth. In addition, in the time domain, only some symbols in the time slot can be used. The BS can allocate a CORESET to each UE, and control information can be sent through the allocated CORESET. In NR, the UE can receive control information from the BS without having to receive the entire system frequency band.

[0092] The CORESET may include a UE-specific CORESET for transmitting UE-specific control information and a common CORESET for transmitting control information common to all UEs.

[0093] In addition, NR may require high reliability depending on the application. In this case, the target block error rate (BLER) of downlink control information (DCI) transmitted through a downlink control channel (e.g., a physical downlink control channel (PDCCH)) can be significantly reduced compared to conventional technologies. As an example of a method for satisfying the requirement for high reliability, the content included in the DCI can be reduced and / or the amount of resources used for DCI transmission can be increased. Here, 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 space domain.

[0094] In NR, the following technologies / features can be applied.

[0095] <Self-contained subframe structure>

[0096] Figure 8 An example of a frame structure for a new radio access technology is illustrated.

[0097] In NR, such as Figure 8 As shown in , a structure in which a control channel and a data channel are time-division multiplexed within one TTI may be regarded as a frame structure in order to minimize the waiting time.

[0098] exist Figure 8 In the figure, the shaded area represents the downlink control area, and the black area represents the uplink control area. The remaining area can be used for downlink (DL) data transmission or uplink (UL) data transmission. This structure is characterized in that DL transmission and UL transmission are performed sequentially within one subframe, so DL data can be sent and UL ACK / NACK can be received within the subframe. Therefore, the time required from the occurrence of a data transmission error to the retransmission of data is shortened, thereby minimizing the waiting time for the final data transmission.

[0099] In the subframe structure of data and control TDM, a time gap may be required for the base station and UE to switch from the transmission mode to the reception mode or from the reception mode to the transmission mode. To this end, some OFDM symbols when DL switches to UL can be set as a guard period (GP) in a self-contained subframe structure.

[0100] Fig. 9 The structure of a self-contained time slot is illustrated.

[0101] In the NR system, one time slot includes all of the DL control channel, the DL or UL data channel, the UL control channel, etc. For example, the first N symbols in the time slot can be used to send the DL control channel (then, the DL control region), and the last M symbols in the time slot can be used to send the UL control channel (then, the UL control region). N and M are both integers of 0 or greater. The resource region (then, the data region) located between the DL control region and the UL control region can be used to send DL data or UL data. As an example, one time slot can correspond to one of the following configurations. List each time period in chronological order.

[0102] 1. DL configuration only

[0103] 2. UL configuration only

[0104] 3. Hybrid UL-DL configuration

[0105] -DL area + GP (guard period) + UL control area

[0106] -DL control area + GP + UL area

[0107] DL area: (i) DL data area, (ii) DL control area + DL data area

[0108] UL region: (i) UL data region, (ii) UL data region + UL control region.

[0109] In the DL control region, PDCCH may be transmitted, and in the DL data region, PDSCH may be transmitted. In the UL control region, PUCCH may be transmitted, and in the UL data region, PUSCH may be transmitted. In the PDCCH, downlink control information (DCI) may be transmitted, for example, DL data scheduling information or UL data scheduling information. In the PUCCH, uplink control information (UCI) may be transmitted, for example, ACK / NACK (positive acknowledgement / negative acknowledgement) information for DL ​​data, channel state information (CSI) information, or scheduling request (SR) may be transmitted. GP provides a time gap during the process of the gNB and UE transitioning from a transmission mode to a reception mode or during the process of the gNB and UE transitioning from a reception mode to a transmission mode. The symbol portion within a subframe belonging to the timing of the mode change from DL to UL may be configured as a GP.

[0110] <Analog Beamforming #1>

[0111] The wavelength is shortened to millimeter waves (mmW), so a large number of antenna elements can be installed in the same area. That is, the wavelength is 1 cm at 30 GHz, so a total of 100 antenna elements can be installed in a 5×5 cm panel in a two-dimensional array at intervals of 0.5λ (wavelength). Therefore, a large number of antenna elements can be used in mmW to increase beamforming (BF) gain to increase coverage or improve throughput.

[0112] In this case, if a transceiver unit (TXRU) is provided to adjust the transmit power and phase of each antenna element, independent beamforming for each frequency resource can be performed. However, installing a TXRU for all approximately 100 antenna elements is inefficient in terms of cost. Therefore, a method of mapping a large number of antenna elements to one TXRU using an analog phase shifter and controlling the beam direction is considered. This analog beamforming can form only one beam direction in all frequency bands, and therefore cannot provide frequency selective beamforming.

[0113] Hybrid beamforming (BF) with fewer than B TXRUs than Q antenna elements can be considered an intermediate form of digital BF and analog BF. In this case, the number of directions of beams that can be transmitted simultaneously is limited to B, although the number depends on the method of connecting the B TXRUs and the Q antenna elements.

[0114] <Analog Beamforming #2>

[0115] When multiple antennas are used in NR, hybrid beamforming, which is a combination of digital beamforming and analog beamforming, occurs. Here, in analog beamforming (or RF beamforming), the RF end performs precoding (or combining), so it is possible to achieve performance similar to digital beamforming while reducing the number of RF chains and the number of D / A (or A / D) converters. For ease of description, the hybrid beamforming structure can be represented by N TXRUs and M physical antennas. Then, the digital beamforming of the L data layers to be sent at the transmitting end can be represented by an N×L matrix, and the converted N digital signals are converted into analog signals via the TXRU, and analog beamforming represented by the M×N matrix is ​​applied.

[0116] System information of the NR system can be transmitted in a broadcast manner. In this case, in one symbol, analog beams belonging to different antenna panels can be transmitted simultaneously. A scheme of introducing a beam RS (BRS), which is a reference signal (RS) transmitted by applying a single analog beam (corresponding to a specific antenna panel), is being discussed to measure the channel of each analog beam. 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 BRS, a synchronization signal or xPBCH can be transmitted by applying all analog beams within the analog beam group so as to be correctly received by any UE.

[0117] In NR, in the time domain, a synchronization signal block (SSB, or also referred to as a synchronization signal and physical broadcast channel (SS / PBCH)) may consist of 4 OFDM symbols indexed 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) may be mapped to the symbols. As described above, a synchronization signal block may also be represented by a SS / PBCH block.

[0118] In NR, since multiple synchronization signal blocks (SSBs) can be transmitted at different times respectively and SSBs can be used to perform initial access (IA), serving cell measurement, etc., it is preferred to transmit SSBs first when the transmission time and resources of SSBs overlap with the transmission time and resources of other signals. For this purpose, the network can broadcast the transmission time and resource information of SSBs, or indicate them through UE-specific RRC signaling.

[0119] In NR, transmission and reception can be performed based on beams. If the reception performance of the current serving beam deteriorates, a process of searching for a new beam through so-called beam failure recovery (BFR) can be performed.

[0120] Since the BFR process is not intended to declare an error or failure of 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. During the BFR process, measurements of different beams configured by the network (which can be represented in terms of CSI-RS ports or synchronization signal block (SSB) indexes) can be performed, and the best beam for the corresponding UE can be selected. The UE can perform the BFR process in such a way that it performs RACH processing associated with the beam that produces good measurement results.

[0121] Now, a transmission configuration indicator (hereinafter, TCI) state will be described. The TCI state may be configured for each CORESET of a control channel, and a parameter for determining an RX beam of a UE may be determined based on the TCI state.

[0122] For each DL BWP of the serving cell, the UE may be configured for three or fewer CORESETs. In addition, the UE may receive the following information for each CORESET.

[0123] 1) a CORESET index p (e.g., one of 0 to 11, where the index of each CORESET can be uniquely determined in the BWP of one serving cell),

[0124] 2) PDCCH DM-RS scrambling sequence initialization value,

[0125] 3) the duration of the CORESET in the time domain (can be given in symbols),

[0126] 4) Resource block collection,

[0127] 5) CCE to REG mapping parameters,

[0128] 6) Antenna port quasi co-location, which indicates the quasi co-location (QCL) information of the DM-RS antenna ports for receiving PDCCH in each CORESET (from a set of antenna port quasi co-location provided by a higher layer parameter called "TCI-State"),

[0129] 7) An indication of the presence of a Transmission Configuration Indication (TCI) field for a specific DCI format transmitted by PDCCH in CORESET, etc.

[0130] QCL will be described. If the characteristics of the channel through which the symbols on one antenna port are transmitted can be inferred from the characteristics of the channel through which the symbols on the other antenna port are transmitted, the two antenna ports are said to be quasi-co-located (QCL). For example, when two signals A and 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 states. From the perspective of the receiver, when one of the two signals is received, the other signal can be detected by using the channel characteristics of the received signal.

[0131] In this sense, when signal A and signal B are said to be quasi co-located (QCL), this may mean that signal A and signal B experience similar channel conditions, and therefore, channel information estimated to detect signal A is also useful for detecting signal B. Herein, channel conditions may be defined according to, for example, Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameters, and the like.

[0132] The "TCI-State" parameter associates one or two downlink reference signals with the corresponding QCL type (QCL types A, B, C and D, see Table 4).

[0133] [Table 4]

[0134] QCL Type describe QCL-Type A Doppler shift, Doppler spread, average delay, delay spread QCL-Type B Doppler shift, Doppler spread QCL-Type C Doppler shift, average delay QCL-Type D Space Rx parameters

[0135] Each "TCI-State" may include parameters for configuring a QCL relationship between one or two downlink reference signals and a DM-RS port of a PDSCH (or PDDCH) or a CSI-RS port of a CSI-RS resource.

[0136] In addition, for each DL BWP configured for the 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.

[0137] 1) Search space set index s (0≤s<40), 2) Association between CORESET p and search space set s, 3) PDCCH monitoring periodicity and PDCCH monitoring offset (time slot unit), 4) PDCCH monitoring pattern within a time slot (e.g., indicating the first symbol of the CORESET in the time slot used for PDCCH monitoring), 5) The number of time slots in which there is search space set s, 6) The number of PDCCH candidates for each CCE aggregation level, 7) Information indicating whether the search space set s is CSS or USS.

[0138] In NR, CORESET#0 may be configured via PBCH (or UE-specific signaling for handover or PSCell configuration or BWP configuration). Search Space (SS) Set #0 configured via PBCH may monitor offsets (e.g., slot offsets, symbol offsets) that are different for each associated SSB. This may be required to minimize the search space opportunities monitored by the UE. Alternatively, this may be required to provide a beam scanning control / data region capable of performing control / data transmission on a per-beam basis in order to persistently perform communication with the UE in a situation where the UE's best beam changes dynamically.

[0139] Fig.10 Physical channels and typical signaling are illustrated.

[0140] Reference Fig.10 In a wireless communication system, a UE receives information from a BS through a downlink (DL), and the UE transmits information to the BS through an uplink (UL). Data transmitted / received by the BS and the UE includes data and various control information, and there are various physical channels according to the type / purpose of information transmitted / received by the BS and the UE.

[0141] A UE that is powered on again in a power-off state or newly enters a cell performs an initial cell search operation such as adjusting synchronization with the BS (S11). To this end, the UE receives a primary synchronization channel (PSCH) and a secondary synchronization channel (SSCH) from the BS to adjust synchronization with the BS and acquire information such as a cell identity (ID). In addition, the UE may receive a physical broadcast channel (PBCH) from the BS to acquire broadcast information in the cell. In addition, the UE may receive a downlink reference signal (DL RS) in the initial cell search step to identify a downlink channel state.

[0142] (Initial) cell search is a process in which a UE acquires time and frequency synchronization with a cell and detects the cell ID of the cell. The cell search may be based on the primary synchronization signal and the secondary synchronization signal of the cell, and the PBCH DMRS.

[0143] After completing the initial cell search, the UE may receive a physical downlink control channel (PDCCH) and a corresponding physical downlink shared channel (PDSCH) to acquire more specific system information (S12).

[0144] Thereafter, the UE may perform a random access procedure to complete access to the BS (S13 to S16). Specifically, the UE may send a preamble through a physical random access channel (PRACH) (S13), and may receive a random access response (RAR) to the preamble through a PDCCH and a PDSCH corresponding thereto (S14). Thereafter, the UE may send a physical uplink shared channel (PUSCH) by using the scheduling information in the RAR (S15), and may perform a contention resolution procedure (which may be referred to as a process of receiving a contention resolution message) similar to the PDCCH and the PDSCH corresponding thereto (S16).

[0145] After performing the above-mentioned process, the UE may perform PDCCH / PDSCH reception (S17) and PUSCH / physical uplink control channel (PUCCH) transmission (S18) as a typical uplink / downlink signal transmission process. The control information sent by the UE to the BS is called uplink control information (UCI). UCI includes hybrid automatic repeat and request (HARQ) confirmation (ACK) / negative ACK (NACK), scheduling request (SR), channel state information (CSI), etc. CSI includes channel quality indicator (CQI), precoding matrix indicator (PMI), rank indication (RI), etc. Typically, UCI is transmitted through PUCCH. However, when control information and data are to be transmitted simultaneously, UCI may be transmitted through PUSCH. In addition, the UE may transmit UCI irregularly through PUSCH according to the request / instruction of the network.

[0146] In order to enable reasonable battery consumption when bandwidth adaptation (BA) is configured, 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 perform transmissions on the PUCCH, PRACH and UL-SCH.

[0147] For BA, the RX and TX bandwidths of the UE are not necessarily as wide as the bandwidth of the cell and can be adjusted. That is, the width can be commanded to change (e.g., reduced for low activity time periods for power saving), the position in the frequency domain can be moved (e.g., to increase scheduling flexibility), and the subcarrier spacing can be changed (e.g., to allow different services). A subset of the entire cell bandwidth of a cell is called a bandwidth part (BWP), and a BA is obtained by configuring a BWP for the UE and by notifying the UE of the current active BWP among the configured BWPs. When BA is configured, the UE only needs 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. The BWP inactivity timer (independent of the DRX inactivity timer mentioned above) is used to switch the active BWP to the default BWP. That is, when the PDCCH decoding is successful, the timer is restarted, and when the timer expires, the timer switches to the default BWP.

[0148] The following is an explanation of the integrated access and backhaul link (IAB). Below, for ease of explanation, the proposed solution is explained based on the new RAT (NR) system, but the scope of the system to which the proposed solution is applied can be extended to other systems such as 3GPP LTE / LTE-A system in addition to the NR system.

[0149] One of the potential technologies for enabling future cellular network configuration scenarios and applications is the technology that supports wireless backhaul and relay links, which can achieve flexible and very dense configuration of NR cells without the need to scale the transport network.

[0150] Compared to LTE, it is expected that larger bandwidths (e.g., mmWave spectrum) will be available in NR together with native deployment of massive MIMO or multi-beam systems, so there is an opportunity to develop and deploy integrated access and backhaul links. This enables easier deployment of dense networks of self-backhauled NR cells in a more integrated manner by building multiple control and data channels / processes defined in a way that provides connectivity or access to UEs. Such systems are referred to as integrated access and backhaul links (IAB).

[0151] The following definitions are made in this disclosure.

[0152] -AC(x): access link between node (x) and UE.

[0153] - BH(xy): backhaul link between node (x) and node (y).

[0154] At this time, the node may refer to a DgNB (donor gNB) or a relay node (RN). Here, the DgNB or the donor node may be a gNB that provides a function of supporting a backhaul for an IAB node.

[0155] When there are relay node 1 and relay node 2, and relay node 1 and relay node 2 are connected through a return link and relaying data sent and received by relay node 2, relay node 1 is named as the parent node of relay node 2, and relay node 2 is named as the child node of relay node 1.

[0156] The technical features individually described in one of the drawings in this specification may be implemented individually or simultaneously.

[0157] The following figures are used to illustrate a specific example of this specification. The names of specific devices or specific signals / messages / fields recorded in the figures are only for illustration, so the technical features of this specification are not limited to the specific names used in the following figures.

[0158] The present disclosure proposes a method for determining the operating frequency resources of a mobile terminal (MT) and a remote unit (RU) of a network-controlled repeater (NCR) when the NCR is operating in an NR environment. Hereinafter, a repeater may also be referred to as a transponder. Hereinafter, an MT may also be referred to as an NCR-MT, and an RU may also be referred to as an NCR-Fwd (forwarding).

[0159] <Transport network architecture for 5G>

[0160] Fig.11 The transport network architecture for 5G is illustrated.

[0161] ITU-T (Telecommunication Standardization Sector) has chosen Fig.11 The transmission network architecture for 5G shown in (a) is composed of three logical elements: CU (centralized unit), DU (distributed unit), and RU (remote unit).

[0162] In this model, the mid and lower layer functions are divided into DU and RU. RU implements RF functions, and may also implement low-PHY and high-PHY functions depending on the functional division between RU and DU. Depending on the network requirements, CU, DU and RU are combined into different combinations to form actual physical network elements.

[0163] For example, Fig.11 As shown in (b) to (d) of FIG. 4 , CU, DU and RU are combined into various combinations. This provides flexibility that can include various network architectures, applications and transmission network requirements.

[0164] like Fig.11 As shown, the transport network between 5GC and CU is called backhaul. The backhaul network implements the 3GPP NG interface. Similarly, the transport network between CU and DU is called midhaul. The midhaul network implements the 3GPP F1 interface. Finally, the transport network between DU and RU is called fronthaul. Backhaul, midhaul, and fronthaul are collectively referred to as xhaul.

[0165] Reconfigurable intelligent surface (RIS), also known as intelligent reflecting surface (IRS) and large intelligent surface (LIS), is a programmable structure that changes the electrical and magnetic properties of the surface for controlling the propagation of electromagnetic waves (EM).

[0166] In addition to the electromagnetic wave control function, RIS integrates a detection function for detecting the wireless environment. When RIS is configured in the environment where a wireless system operates, the attributes of the wireless channel can be at least partially controlled.

[0167] The inherent functions of RIS can provide many advantages, including the potential to improve stability and coverage performance through beamforming or range extension. As the propagation environment can be controlled, some changes are taking place in the existing wireless system design paradigm, in which the wireless channel is mostly regarded as an uncontrollable existence that distorts the transmitted signal. Traditional transmitters (TX) and receivers (RX) are designed to equally disperse the influence of the channel. Various scenarios can be imagined, from the case of configuring a RIS on a wall to the case of transmitting a signal from a predetermined direction.

[0168] By using RIS, it is possible to provide a 'penetration effect' of transmitting an external signal to the base station signal inside a building and a'reflection effect' in a non-line-of-sight (NLoS) environment, thereby improving the coverage of blind spots.

[0169] <Network-controlled repeater in NR>

[0170] (1) Conventional RF repeater

[0171] In the past, the RF repeater was a non-regenerative type of relay node that simply amplified all the received signals and forwarded them. The main advantages of the RF repeater are low cost, ease of configuration, and no additional latency. The main disadvantage is that it may increase system interference (pollution) by amplifying both signals and noise.

[0172] (2) Rel-17 WI on RF repeater (RAN4)

[0173] RF repeaters are specified in RAN4 Rel-17 for FR1 band FDD / TDD and FR2 band. Rel-17 WID (Work Item Description) only includes RF requirements. RAN4 WID explicitly states that "it is assumed that the repeater does not perform adaptive beamforming toward the UE."

[0174] (3) Rel-18 Network controlled repeater for NR

[0175] Coverage is a fundamental aspect of cellular network configuration. Mobile operators provide overall coverage based on various types of network nodes. Regular full-stack cell configuration is an option, but is not always possible (e.g., when there is no backhaul availability) and may not be economically affordable.

[0176] As a result, new types of network nodes are considered to improve the network configuration flexibility of mobile communication operators. For example, integrated access and backhaul (IAB) was introduced in Rel-16 as a new type of network node that does not require a wired backhaul and was improved in Rel-17. Another type of network node is an RF repeater that simply amplifies and forwards all received signals. RF repeaters are widely deployed to supplement the coverage provided by regular full-stack cells in 2G, 3G and 4G.

[0177] RF repeaters provide a cost-effective means of extending network coverage, but are limited. RF repeaters simply perform amplification and forwarding operations without considering various elements that can improve performance. Such elements include information about semi-static and / or dynamic downlink / uplink configurations, adaptive transmitter / receiver spatial beamforming, ON-OFF status, etc.

[0178] Network controlled repeaters (NCRs) are better than existing RF repeaters in receiving and processing side control information from the network. Side control information enables network controlled repeaters to perform amplification and forwarding operations in a more efficient manner. Potential advantages include mitigating the amplification of unnecessary noise, achieving better spatial directional transmission and reception, and achieving simplified network integration.

[0179] Regarding the study of Network Controlled Repeaters (NCR), the focus will be on the following scenarios and assumptions.

[0180] Network controlled repeaters are in-band RF repeaters used to extend network coverage in the FR1 and FR2 bands. The FR2 configuration specifies priorities for both outdoor and O2I scenarios.

[0181] The network controls the relay transparently to the UE.

[0182] The network controls the relay to maintain both the base station-relay link and the relay-UE link.

[0183] Cost-effectiveness is a core consideration for network controlled repeaters.

[0184] It is necessary to study and identify the following side control information.

[0185] Beamforming information, timing information for aligning the transmit and receive boundaries of network control repeaters, UL-DL TDD configuration information, ON-OFF information for effective interference management and improving energy efficiency, power control information for effective interference management, etc.

[0186] It is necessary to study and identify the L1 / L2 signals (including corresponding configuration) used for transmitting side control information. From the management aspect of network control repeaters, it is necessary to study the identification and authentication of network control repeaters.

[0187] It can be considered that NCR is composed of RU and MT.

[0188] Fig.12 An example of a topology in which NCR performs transmission and reception between a base station and a UE is shown.

[0189] Reference Fig.12 , there are CU and / or DU in the base station, and NCR is connected to the base station. NCR is composed of MT and RU.

[0190] The RU consists of only the RF layer. The RU receives the signal sent by the base station at the RF end and forwards it to the UE, and receives the signal sent by the UE at the RF end and forwards it to the base station.

[0191] The RU only forwards signals between the base station and the UE, and cannot autonomously generate signals / channels and send them to the base station / UE or receive signals / channels from the base station / UE for detection.

[0192] In order to forward the received signal, the RU may consider adjusting the transmit / receive beam direction, DL / UL direction, ON / OFF, transmit (Tx) power, etc. at the RF end. However, the operation of such RU cannot be determined by the NCR itself and is completely controlled by the base station.

[0193] The MT includes an RF layer and an L1 layer, an L2 layer, and / or an L3 layer. For example, the MT is composed of only an RF layer and an L1 layer or an L1 / L2 layer. Alternatively, the MT may be composed of an RF layer and L1 / L2 / L3 layers.

[0194] The MT detects / receives a signal / channel sent by the base station, and generates and sends a signal / channel to the base station. In addition, the MT receives information required to control the operation of the RU (ie, side control information) from the base station. No transmission or reception is performed between the MT and the UE.

[0195] Fig.13 is a diagram comparing the operation of NCR and existing RF repeaters.

[0196] Reference Fig.13 (a), in the case of the existing RF repeater, beamforming that applies all (omni)-directions or fixed directions is performed. On the other hand, Fig.13 As shown in (b), in the NCR, the Tx / Rx beam direction of the NCR is adaptively adjusted according to the position of the UE and the channel condition of the UE, so as to obtain a beamforming gain.

[0197] In the case of existing RF repeaters, it is impossible to distinguish between DL / UL directions in the TDD system and always perform transmission and reception in the DL and UL directions simultaneously. Or only a fixed TDD configuration is applied to perform switching between the DL direction and the UL direction in a specified time pattern. On the other hand, in the NCR, the TDD configuration is considered and the DL / UL switching is performed by the NCR. As a result, the DL / UL operation is performed adaptively, reducing the power waste and interference caused by forwarding unnecessary signals.

[0198] In the case of existing RF repeaters, the power of received signals is always amplified and forwarded regardless of whether the base station and UE send signals. This wastes power unnecessarily and increases interference to the surroundings. In the case of NCR, ON / OFF operation is performed, and when there is no signal to be forwarded to the base station / UE, the operation of RU is turned off and unnecessary signals are not forwarded.

[0199] In the case of existing RF repeaters, the power of the received signal is amplified at a fixed ratio and then forwarded. In the case of NCR, when the signal is transmitted with unnecessary high power, the transmission power of the NCR is reduced, thereby reducing the impact of interference generated in the surrounding area, and when the signal is forwarded with low power, the transmission power of the NCR is increased, so that the signal is stably forwarded to the receiver.

[0200] In the case of the existing RF repeater, the operation is performed without knowing the DL / UL time slot boundary. On the other hand, in the case of the NCR, in order to adaptively adjust the beamforming, ON / OFF, DL / UL direction, Tx power, etc. as described above, the NCR needs to know the DL and UL transmission and reception boundaries. Therefore, different RU operations are applied according to each unit time (e.g., time slot / symbol).

[0201] Fig.14 Illustrate the links between the base station, NCR and UE.

[0202] Reference Fig.14 , NCR includes NCR-MT and NCR-Fwd.

[0203] NCR-MT is defined as a functional entity that communicates with a base station (gNB) via a control link (C-link) in order to exchange information (e.g. side control information). The C-link is based on the NR Uu interface.

[0204] The side control information is information used for at least NCR-Fwd control.

[0205] NCR-Fwd is defined as a functional entity that performs amplification and forwarding of UL / DL RF signals between a base station and a user equipment (UE) through a backhaul link and an access link. The operation of NCR-Fwd is controlled according to side control information received from the base station.

[0206] The contents of the present disclosure are recorded assuming operations in the NCR. However, the contents of the present disclosure may also be applied to devices instead of NCR. In particular, the contents of the present disclosure are applied for the purpose of performing operations in the RIS. For this purpose, the NCR mentioned in the present disclosure may be replaced by the RIS for expansion / interpretation. In this case, the RU performs the role of forwarding signals from the base station to the UE and forwarding signals from the UE to the base station in the RIS, and the MT performs the role of receiving side control information from the base station for controlling the signal transmission of the RU.

[0207] Based on such discussion, the present disclosure provides an association between side control information and time domain resources when performing NCR operation.

[0208] Regarding the network in the present disclosure, it can be explained by replacing the base station or CU / DU. In addition, regarding the base station, it can be explained by replacing the network, CU, and DU.

[0209] In order to forward the received signal, the RU in the NCR considers adjusting the transceiver beam direction, DL / UL direction, ON / OFF, transmission power, etc. at the RF end. However, the operation of such RU cannot be determined by the NCR itself and is completely controlled by the base station. To this end, the MT receives the information required to control the operation of the RU (i.e., side control information) from the base station. Such side control information is transmitted through L1 / L2 signaling such as DCI and MAC-CE.

[0210] The side control information includes, for example, all or part of the following information.

[0211] 1) Beamforming information. This refers to information about the Tx / Rx beam direction of the RU. Such information includes beam directions about UL Tx from the base station, DL Rx from the base station, DL Tx to the UE, and / or UL Rx from the UE.

[0212] 2) Timing information to align transmission / reception boundaries of network-controlled repeater. This refers to the information used by the RU to align the Tx / Rx time slot or symbol boundaries.

[0213] 3) Information on UL-DL TDD configuration This indicates information about the DL / UL direction of the RU.

[0214] 4) ON-OFF information for efficient interference management and improved energy efficiency. This indicates information about the ON-OFF operation of the RU.

[0215] 5) Power control information for efficient interference management. This refers to information about the transmit power of the RU. Such information includes the UL transmit power to the base station and / or the DL transmit power to the UE.

[0216] Different side control information is applied according to each time resource. In this case, it is necessary to indicate the side control information according to each time resource.

[0217] Assuming that the side control information is transmitted by MAC-CE and / or DCI, the side control information is transmitted by different MAC-CE and / or DCI for each time resource unit. In this case, the side control information needs to be transmitted for each time resource unit. Considering this, when the side control information is transmitted at one time, the side control information about multiple time resource units can be indicated. In such a case, the side control information about multiple time resource units needs to be determined in advance and pre-configured, which has disadvantages in this regard, but effective signaling notification can be achieved.

[0218] In consideration of such a point, a method for determining a time resource of application-side control information and a method for indicating side control information on multiple time resources in NCR are proposed below.

[0219] The present disclosure proposes a method for determining a time resource for applying side control information sent by a base station to an MT for performing RU operation in an NCR and a method for indicating side control information for multiple time resources.

[0220] <Time resource unit for side control information>

[0221] The present disclosure proposes the time resource unit of the side control information when the base station indicates the side control information applied to the RU to the MT. At this time, the unit of the time resource of the application side control information is, for example, a time slot. That is, the side control information can be indicated by a time slot unit.

[0222] In order to determine the actual time resource corresponding to such a time resource unit, subcarrier spacing (SCS) information is configured. The length of a time slot in the time domain differs according to the subcarrier spacing in the frequency domain used.

[0223] In the case of RU, it is impossible to know the subcarrier spacing information and time slot length information of the signal forwarded by itself. Therefore, when the RU is configured with side control information, it is unable to determine the actual time resources of the time slot to which the side control information is applied. Taking this into account, the base station configures the MT with information about the subcarrier spacing applied to the RU. For example, the reference subcarrier spacing (SCS) information applied in the configuration of the side control information configured / provided to the MT for the forwarding operation of the RU.

[0224] According to an embodiment, the time resource unit of the application side control information is multiple time slots. That is, the application side control information is applied differently (or independently) from each other in units of multiple time slots. For example, assuming that the application side control information is applied in units of M (M is a natural number greater than 2) time slots (that is, when the time resource unit for the side control information is M time slots), the value of the above M may be a value configured by the base station to the MT. The base station configures the value of the above M to the MT semi-statically through an RRC signal. Or each time the side control information is sent, the base station indicates the value corresponding to the above M to the MT through MAC-CE and / or DCI, etc.

[0225] For the sake of convenience, the following description assumes that the time domain resource unit of the side control information is a time slot, but the present disclosure includes the case where other time domain resource units (eg, multiple time slots, symbols, multiple symbols) are used instead of time slots.

[0226] <Method for indicating side control information for multiple time resources>

[0227] When the base station indicates the side control information applied to the RU to the MT, the side control information about the multiple time resource units is also indicated. In this case, the side control information for the multiple time resources is specifically indicated in the following method.

[0228] Method 1: A method of indicating the applied side control information per time resource unit.

[0229] The side control information applied to each time resource is indicated for multiple time resources in units of time resources. For example, the side control information applied to each time slot is indicated for multiple time slots. In this case, such multiple time slots may refer to continuous time slots or non-continuous time slots.

[0230] To this end, N values ​​of side control information are indicated, wherein the nth indication value may refer to the side control information applied to the nth time slot among the N time slots. For example, 64 beam index values ​​are indicated by the side control information, and the nth beam index value may refer to the beam index applied to the nth time slot among the 64 time slots.

[0231] Method 2: A method of indicating time resource information to which corresponding information is applied according to each side control information.

[0232] When the side control information has one value (or state) among a plurality of values ​​(or states), information about a time resource to which the corresponding value (or state) is applied is indicated according to each value (or state) of the side control information. For example, for the side control information, information about a set of time slot indices to which the corresponding value (or state) is applied is indicated according to each of the plurality of values ​​(or states).

[0233] For example, the slot index to which each beam index is applied is indicated for A beam indices through the side control information.

[0234] Method 3: A method of indicating, for each side control information, the start position and / or duration (duration) information of the time resource to which the corresponding information is applied.

[0235] According to this method, the MT determines to apply the corresponding side control information during the interval of the time resource from the start position of the time resource.

[0236] According to the embodiment, the MT is instructed from the base station a value of K as a value corresponding to the start position of the application side control information, and is instructed a value of D as a value corresponding to the interval. At this time, the MT determines to apply the corresponding side control information during the D time slot from a time point after K time slots from a time point when the corresponding side control information is received.

[0237] According to an embodiment, in order to perform periodic beam indication for access link, an RRC signal (signaling) may be used. The above RRC signal includes X (1≤X≤X max ) A list of forwarding resources that can perform forwarding operations of MT. Here, each forwarding resource is defined as {beam index, time resource}.

[0238] The time resource is defined as {a start time slot defined by a time slot offset (within a cycle), a start symbol defined by a symbol offset within a time slot, and an interval defined by the number of symbols} (based on a dedicated field). For example, a time slot separated by a time slot offset based on a point at the beginning of a cycle is the start time slot of the time resource, a symbol separated by a symbol offset in an initial symbol of the start time slot is the start symbol of the time resource, and a number of symbols indicated by the interval from the start symbol are the symbols of the time resource.

[0239] For periodic beam indication, the RRC signal may also be configured with a periodicity. For all time resources within a periodic beam indication, the same periodicity may be assumed.

[0240] In order to perform periodic beam indication, the above RRC signal may also be configured with a reference SCS (subcarrier spacing). For all time resources within a periodic beam indication, the same reference SCS may be assumed.

[0241] In the case of semi-persistent beam indication, the RRC signal includes Y lists, and the yth list includes Z y (1≤Z y ≤Z max )Forwarding resources. max Indicates the maximum beam indicated by one indication, for example, 128. Each forwarding resource is defined as {beam index, time resource}. The period and reference SCS are configured for each list through the above RRC signal. For example, the period and reference SCS are independently configured for each list through the above RRC signal. MAC-CE activates / deactivates one of the above Y lists, in which case Z in the corresponding list is selected. y MAC-CE provides all forwarding resources for Z y Update of beam index.

[0242] In the case of aperiodic beam indication for access links, one DCI is used, including the following information.

[0243] To indicate beam information, L is used max Each field indicates a beam index or corresponds to a beam index. The number of bits (bitwidth) of each field is determined by the number of beams used to access the link.

[0244] To indicate time resources, use T max The list of time resources is predefined by RRC signaling. The number of bits (bitwidth) of each field is determined by the length of the above list. max Value and L max Same (ie, T max =L max ). max The value is always the same as L max Same. maxThe value of is configured via RRC signaling.

[0245] In the aperiodic beam indication for the access link through DCI, T max =L max (or T max The value is always the same as L max The same), the time resource indication and the beam indication are sequentially mapped in 1:1. In addition, in the aperiodic beam indication for the access link, the reference SCS for the time resource is configured through the RRC signaling for time resource configuration.

[0246] Fig.15 An example of defining a time resource associated with a beam index is shown.

[0247] Reference Fig.15 , the time slot separated by the time slot offset based on the starting point of a cycle is the starting time slot of the above time resource, the symbol separated by the symbol offset in the initial symbol of the above starting time slot is the starting symbol of the above time resource, and the number of symbols indicated by the above interval from the above starting symbol is the symbol of the above time resource. However, this is only an example and is not limited to this.

[0248] For example, regarding the time slot offset, the reference point may not be the starting point of a period, but the ending point of a period. Similarly, in the symbol offset, the reference point may not be the starting point of the time slot, but the ending point of the time slot. Fig.15 The example in FIG. 1 illustrates a case where all time resources associated with a beam index are included in one time slot, but the present invention is not limited thereto. That is, the time resources may also be included in a plurality of consecutive time slots.

[0249] According to the embodiment, the MT can also determine the starting position of the time resource of the application side control information without additional instructions. For example, the MT determines that the starting position of the time resource is applied from the time point after K' time slots from the time point of receiving the corresponding side control information. At this time, the value of the above K' is defined as a specific value in the standard specification.

[0250] Such an indication includes side control information for D time resource units (e.g., D time slots). At this time, the above interval D value is fixed in the standard specification or flexibly determined within a specified range when indicating the side control information. According to an embodiment, the value that can be used as the above interval D is the same as or a part of the value of the interval / period possessed by the TDD configuration. Or the value used as such an interval D includes a multiple of the value of the interval (duration) / period (period) included in the TDD configuration.

[0251] Such indication is applied periodically or aperiodically. According to an embodiment, in the case of side control information indicated by MAC-CE, the indicated information is applied periodically. On the other hand, in the case of side control information indicated by DCI, the indicated information is applied aperiodically.

[0252] When such an indication is applied periodically, P time resource units (e.g., P time slots) are applied as a period. At this time, the period P value is fixed in the standard specification or configured by the base station. Or it is configured when the base station indicates the side control information. Or the period P value is the same as the above interval D value.

[0253] <Method for indicating time domain resources using access link beam indication>

[0254] In the case of the access link beam indication of NCR-Fwd, dynamic beam indication and semi-persistent (semi-static) beam indication can be used. The access link beam indication and the time domain granularity determined can use the granularity of the time slot level and the symbol level. The unit of the time resource to which the access link beam indication is applied can be either a time slot, a symbol, or a combination of a time slot and a symbol. For example, both time slots and symbols can be used, such as indicating multiple symbols from a specific symbol in a specific time slot.

[0255] The time domain resources corresponding to the access link beam are determined based on the time domain resources explicitly indicated according to each beam indication. That is, when the beam index of the access link applied to the NCR-Fwd is indicated by the access link beam indication, information about the time resources to which the corresponding beam index is applied can also be indicated.

[0256] Next, a method for determining the time resource for applying the corresponding beam information when indicating the access link beam is described. However, the following content is not only applicable to the access link beam indication, but also can be applied to the case of determining the time resource for applying other side control information such as ON-OFF indication and power control indication.

[0257] <Semi-static / periodic configuration>

[0258] In the case of semi-static or periodic beam indication, time resource information for applying the corresponding beam index is configured for multiple beam indexes according to each beam index. For example, with respect to the access link beam indication, when there are beams with beam indexes #0, #1, ..., #N-1, the position of the time resource for applying the corresponding beam index is configured according to each beam index.

[0259] More specifically, in the case of semi-persistent beam indication, the RRC signal includes Y lists, the yth list includes Z y (1≤Z y ≤Z max )Forwarding resources. max It refers to the maximum beam indicated by one indication, for example, 128. Each forwarding resource is defined as {beam index, time resource}.

[0260] At this time, the time resource is defined as, for example, {a start slot defined by a slot offset (in one cycle), a start symbol defined by a symbol offset in the slot, and a section defined by the number of symbols}.

[0261] The RRC signal is used to configure the period and reference SCS for each list. MAC-CE activates / deactivates one of the Y lists. In this case, Z in the corresponding list is selected. y MAC-CE can provide all forwarding resources for Z y Update of beam index.

[0262] Fig.16 Illustrate semi-static access link beam configuration.

[0263] Reference Fig.16 (a) of the present invention configures information on time resources to which each beam index is applied for a multi-beam index through a semi-static beam indication.

[0264] For example, in order to inform the position of the time resource to which each beam index is applied, one or more sets of {start symbol position, symbol length} information are configured. Each {start symbol position, symbol length} information refers to a symbol interval that is continuous with a symbol length from the start symbol position. In this case, it can be indicated that the corresponding beam index is applied in the time resource configured by the {start symbol position, symbol length} information of multiple sets.

[0265] Reference Fig.16 (b) shows an example of indicating the time domain resources for beam index #0. For example, {start symbol 1, symbol length 1} and {start symbol 2, symbol length 2} information are configured to indicate the time resources to which beam index #0 is applied. In this case, NCR determines that beam index #0 is applied during the symbol length 1 interval from the start symbol 1 position and during the symbol length 2 interval from the start symbol 2 position in each cycle.

[0266] The starting symbol position refers to the relative symbol position from the starting point of each period.

[0267] Alternatively, when multiple {start symbol position, symbol length} information is configured, the first start symbol position information refers to the relative symbol position from the start point of the period, and the remaining start symbol position information refers to the relative symbol position from the end time point of the previous time interval applying the same beam index.

[0268] For example, when {start symbol 1, symbol length 1} and {start symbol 2, symbol length 2} information are configured to indicate the time resource to which beam index #0 is applied, the start symbol 1 information refers to the relative symbol position from the start point of the period. On the other hand, the start symbol 2 information refers to the relative symbol position from the end time point of the symbol interval indicated by {start symbol 1, symbol length 1}.

[0269] Fig.16 For the sake of convenience, the example of directly indicating the start symbol of the time resource is given, but the present invention is not limited to this. As mentioned above, the start symbol can also be defined by the symbol offset within the time slot.

[0270] The above configuration may be applied periodically with a specific period. The same period may be applied to all beam indices or an independent period may be applied according to each beam index. According to an embodiment, a time resource to which a specific beam index is applied may have an independent period according to {start symbol position, symbol length} or the same period may be applied to {start symbol position, symbol length} of multiple sets.

[0271] More specifically, the access link beam information indicated in a specific NCR is applied with the same period. In this case, the same period is applied to all access link beam indexes to which the NCR is applied.

[0272] Alternatively, an independent period is applied according to each access link beam index indicated to the NCR. In this case, when the time domain resource to which the corresponding beam index is applied is notified for a specific access link beam index, the value of the applied period is also indicated.

[0273] Alternatively, for a specific access link beam index indicated to the NCR, when the time domain resource to which the beam index is applied is composed of multiple resource sets (for example, when composed of multiple {start symbol positions, symbol lengths}), an independent period is applied to each resource set. In this case, when multiple time domain resource sets to which the corresponding beam index is applied are notified for a specific access link beam index, the value of the period applied to each resource set is also indicated.

[0274] <Dynamic / Aperiodic Beam Instruction>

[0275] In case of dynamic and / or aperiodic beam indication, for one or more specific beam indices, time resource information for applying the corresponding beam index is indicated according to each beam index.

[0276] Such an indication may be applied aperiodically, and information on a relative symbol position from a time point when the indication is transmitted may be indicated in order to inform a time resource to which a beam index is applied.

[0277] More specifically, in order to inform the position of the time resource to which each beam index is applied, one or more sets of {offset, symbol length} information are configured. Each {offset, symbol length} information refers to a symbol interval that is continuous with a symbol length from the offset position.

[0278] Each {offset, symbol length} information refers to a symbol interval that is continuous with the symbol length from the start symbol position. In this case, it means that the corresponding beam index is applied in the time resource configured by multiple sets of {offset, symbol length} information.

[0279] Fig.17 is an example of dynamic access link beam indication.

[0280] Reference Fig.17 , {offset 1, symbol length 1} and {offset 2, symbol length 2} information are indicated to indicate the time resource to which beam index #n is applied. In this case, NCR determines that beam index #0 is applied during the symbol length 1 interval from the offset 1 position and during the symbol length 2 interval from the offset 2 position.

[0281] At this time, each offset value indicates a relative symbol position from the time point when the transmission of the side control information is completed. The time point when the transmission of the side control information is completed refers to the last symbol position of the time resource of the PDCCH or PDSCH transmitting the side control information.

[0282] Alternatively, the time point at which the transmission of the side control information ends refers to the last symbol position of the last time slot in the time slot resource of the PDCCH or PDSCH that transmits the side control information.

[0283] Alternatively, when multiple {offset, symbol length} information is configured, the first offset information indicates the relative symbol position from the time point at which the transmission of the side control information ends, and the remaining offset information indicates the relative symbol position from the end time point of the previous time interval to which the same beam index is applied. For example, in the case where {offset 1, symbol length 1} and {offset 2, symbol length 2} information are indicated to indicate the time resource to which beam index #n is applied, the offset 1 information indicates the relative symbol position from the time point at which the transmission of the side control information ends. The offset 2 information indicates the relative symbol position from the end time point of the symbol interval indicated by free {offset 1, symbol length 1}.

[0284] In order to perform dynamic access link beam indication, a new DCI is introduced. Such DCI is NCR-MT specific DCI or NCR-MT group specific DCI.

[0285] In the case of using NCR-MT specific DCI, the access link beam information of NCR-Fwd receiving the side control information by the NCR-MT is indicated through the DCI. Or in the case of using NCR-MT group specific DCI, the side control information received by multiple NCR-MTs is transmitted through the same DCI. In this case, the side control information received by different NCR-MTs is transmitted through the same or different fields. In this case, the NCR-MT determines the position of the field in the DCI that transmits the side control information it receives and obtains the access link beam indication information applied to the NCR-Fwd.

[0286] As described above, when configuring / indicating the side control information, the time resource information of the application corresponding information is also configured / indicated. In this case, information on multiple time resources is included in one configuration / indication.

[0287] For example, when a plurality of time resources having the same beam index as each other are configured / indicated, information on a plurality of time resources to which a corresponding beam index is applied according to each beam index may be included.

[0288] Alternatively, for example, when indicating a plurality of beam index information, in order to indicate a time resource to which each beam index information is applied, information on a plurality of time resources may also be included.

[0289] In this way, when configuring / indicating side control information, in the case of indicating a plurality of time resources at a time, the time resource information is specifically indicated in the following manner.

[0290] Mode 1. Regarding a plurality of time resources, each time resource is configured as follows.

[0291] The time resource is composed of information of a starting time and a duration. In this case, the symbols that are continuous during the duration starting from the symbol indicating the starting time are judged as the symbol resource indicated by the time resource. In this case, the starting time of the time resource is as follows.

[0292] In the case of periodic time resources, it may refer to a relative symbol position (symbol offset) value from the start time point of the period.

[0293] In the case of a non-periodic time resource, it may refer to a relative symbol position (symbol offset) value from the last symbol among symbols constituting the transmission of the indicated PDCCH.

[0294] In the case of non-periodic time resources, it may refer to a relative symbol position (symbol offset) value from the last symbol in symbols constituting transmission of the PUCCH (or PUSCH) transmitting ACK for the indicated PDCCH.

[0295] The time resource is composed of the time slot position and SLIV information. Here, SLIV refers to information about the starting symbol position and symbol length in the time slot. In this case, the symbols that are continuous during the symbol length from the starting symbol position indicated by the free SLIV in the time slot indicated by the time slot position are judged as the symbol resource indicated by the above-mentioned time resource. In this case, the time slot position of the above-mentioned time resource is as follows.

[0296] In the case of periodic time resources, it may refer to a relative time slot position (time slot offset) value from the start time point of the period.

[0297] In the case of non-periodic time resources, it may refer to a relative time slot position (time slot offset) value from the time slot position of the PDCCH to which the instruction is transmitted.

[0298] In the case of a non-periodic time resource, it may refer to a relative time slot position (time slot offset) value from the time slot position where ACK information for the indicated PDCCH is transmitted.

[0299] Mode 2. Regarding a plurality of time resources, each time resource is constituted as follows.

[0300] The time resource is composed of information of the start time and the interval. In this case, the time resource is composed of continuous symbols corresponding to the number of symbols of the interval starting from the symbol corresponding to the start time. At this time, the start time is as follows.

[0301] Option 1. When indicating the first time resource and the second time resource, the start time of the second time resource may refer to a relative symbol position (symbol offset) value compared to the start time of the second time resource (the first symbol among the symbols constituting the second time resource).

[0302] Option 2: When indicating the first time resource and the second time resource, the start time of the second time resource may refer to a relative symbol position (symbol offset) value compared to the last symbol among the symbols constituting the second time resource.

[0303] The time resource is composed of the time slot position and SLIV information. SLIV refers to information about the starting symbol position and symbol length in the time slot. In this case, the time resource is composed of symbols that are continuous from the starting symbol to the symbol length in the time slot corresponding to the time slot position. At this time, the time slot position is as follows.

[0304] When indicating the first time resource and the second time resource, the time slot position with respect to the second time resource may refer to a relative time slot position (time slot offset) value compared to the time slot position of the second time resource.

[0305] At this time, in the case of the first time resource among the multiple time resources, the method in the above-mentioned method 1 is applied to indicate the time resource, and in the case of the remaining time resources, the method in the above-mentioned method 2 is applied to indicate the time resources.

[0306] According to an embodiment, in case of aperiodic beam indication for an access link, a list of time resources is pre-defined through RRC signaling, and specific time resources are indicated through DCI.

[0307] The DCI includes the following fields.

[0308] i)L max The fields are used to indicate beam information. Each field indicates a beam index or corresponds to a beam index. The number of bits (bitwidth) of each field is determined according to the number of beams used for the access link.

[0309] ii) T max The fields are used to indicate time resources. The bit width of each field is determined according to the length of the above list. max Value and L max Same (ie, T max =L max ). max The value is always the same as L max Same. max The value of is configured via RRC signaling.

[0310] In the aperiodic beam indication for the access link through DCI, T max =L max (or T max The value is always the same as L max The time resource indication and the beam indication are sequentially mapped in a 1:1 manner. In addition, in the aperiodic beam indication for the access link, the reference SCS for the time resource is configured through the RRC signaling for time resource configuration.

[0311] Fig.18 An operation method of a Network Controlled Repeater (NCR) including a NCR-Mobile Terminal (MT) and a NCR-Fwd (Forwarding) in a wireless communication system is illustrated.

[0312] Reference Fig.18 , the NCR performs an initial access process with the base station through the NCR-MT (S181). For the initial access process, refer to Fig.10 Explained.

[0313] The NCR receives a control message related to a beam indication for an access link between the NCR-Fwd and the UE from the base station through the NCR-MT (S182). The control message is a radio resource control (RRC) signal / message.

[0314] The NCR performs a forwarding operation based on the control message and through the NCR-Fwd. For example, at least one of a first forwarding operation of amplifying a first signal received from a UE and forwarding it to a base station and a second forwarding operation of amplifying a second signal received from a base station and forwarding it to a UE is performed through the NCR-Fwd. At this time, the control message includes a list of forwarding resources that can perform the forwarding operation (for example, at least one of the first forwarding operation and the second forwarding operation), and each forwarding resource included in the list is defined as a beam index and a time resource (S183).

[0315] For example, the above-mentioned time resources are defined as i) a starting time slot defined by a time slot offset; ii) a starting symbol defined by a symbol offset within a time slot; and iii) a duration defined by the number of symbols.

[0316] When the control message is an RRC signal for periodic beam indication, a periodicity is configured for the list, and the periodicity is applied to all forwarding resources included in the list. In addition, a reference subcarrier spacing (SCS) is configured for the list through the control message, and the reference SCS is applied to all forwarding resources included in the list.

[0317] Based on the control message (RRC signal), NCR-MT controls NCR-Fwd to apply the beam based on the beam index in the time resource.

[0318] The control message includes a plurality of lists of forwarding resources capable of performing the forwarding operation (eg, at least one of the first forwarding operation and the second forwarding operation).

[0319] In the case where the control message is an RRC signal for semi-persistent beam indication, the RRC signal includes Y (Y is a natural number greater than 2) lists, and the yth (y=0, 1, ..., or Y-1) list may include Z y (1≤Z y ≤Z max )Forwarding resources. max Indicates the maximum number of beams that can be indicated at one time. For example, 128.

[0320] Each forwarding resource in the list is defined as {beam index, time resource}. At this time, the time resource is defined as {(in one cycle) a starting time slot defined by a time slot offset, a starting symbol defined by a symbol offset within a time slot, and an interval defined by the number of symbols}.

[0321] In addition, the periodicity and reference SCS are configured for each list through the RRC signal. That is, the periodicity is configured for the list through the RRC signal, and the periodicity is applied to all forwarding resources included in the list. In addition, the reference subcarrier spacing (SCS) is configured for the list through the RRC signal, and the reference SCS is applied to all forwarding resources included in the list.

[0322] In the case of a semi-persistent beam indication, the MAC-CE activates / deactivates one of the Y lists, in which case Z in the corresponding list is selected. y MAC-CE provides all forwarding resources for Z yUpdate of beam index.

[0323] That is, the NCR receives a MAC-CE (medium access control-control element), and the MAC-CE activates / deactivates one list among the plurality of lists configured through the RRC signal.

[0324] When describing the above-mentioned periodic beam indication and semi-static beam indication, the list, the period for the list, and the reference SCS for the list are configured through one RRC signal, but this is only an example for convenience of description. That is, the list, the period for the list, and the reference SCS for the list may not be configured through the same RRC signal / message, but may be configured through RRC signals / messages that are different from or independent of each other.

[0325] In the case of aperiodic beam indication (dynamic beam indication) for access link, the beam index and time resource are indicated by DCI. The beam index is indicated by the beam index field, and the time resource is indicated by the time resource field. The beam index field indicates any one of the beams used for the access link, and the time resource field indicates a specific time resource in the list of time resources predefined by RRC signaling.

[0326] Include L in DCI max The number of bits (bitwidth) of each beam index field is determined by the number of beams that can be used for the access link.

[0327] Include T in DCI max The number of bits (bitwidth) of each time resource field is determined according to the length of the list of time resources predefined by the RRC signal (that is, the number of time resources included in the above list). max The value of L max Same (ie, T max =L max ). max The value is always the same as L max Same. max The value of is configured via RRC signaling.

[0328] In the aperiodic beam indication for the access link through DCI, T max =L max (or T max The value is always the same as L maxThe time resource indication and the beam indication are mapped sequentially in a 1:1 ratio. The NCR determines that the beam indicated by the nth beam index field is applied to the time resource indicated by the nth time resource field. In addition, in the non-periodic beam indication for the access link, the reference SCS for the time resource is configured through the RRC signaling for time resource configuration.

[0329] According to the present disclosure, NCR performs forwarding operation using appropriate beam according to time resources. Therefore, NCR reduces interference to other devices that are not target devices. In addition, compared with the case where such beamforming is not used, the forwarding operation is efficiently performed while consuming less power.

[0330] Fig.19 An operation method of a base station in a wireless communication system is illustrated.

[0331] Reference Fig.19 The base station performs an initial access process of the NCR-MT with the NCR including the NCR-MT and the NCR-Fwd (S191).

[0332] The base station sends a control message related to the beam indication for the access link between the NCR-Fwd and the UE to the NCR-MT (S192). Fig.18 As shown, the above control message may be an RRC signal / message.

[0333] The base station receives a signal from or sends a signal to the NCR-Fwd based on the control message. At this time, the control message includes a list of forwarding resources for the forwarding operation of the NCR-Fwd, and each forwarding resource included in the above list is defined as a beam index and a time resource (S193).

[0334] Fig. 20 A wireless device suitable for use in this specification is exemplified.

[0335] Reference Fig. 20 , the first wireless device 100 and the second wireless device 200 can send / receive wireless signals through various wireless access technologies (e.g., LTE, NR).

[0336] The first wireless device 100 includes at least one processor 102 and at least one memory 104, and may also include at least one transceiver 106 and / or at least one antenna 108. The processor 102 may be configured to control the memory 104 and / or the transceiver 106, and implement the description, functions, processes, proposals, methods and / or operation flows disclosed herein. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then may transmit a radio signal including the first information / signals through the transceiver 106. In addition, the processor 102 may receive a radio signal including second information / signals through the transceiver 106, and may store information obtained from signal processing of the second information / signals in the memory 104. The memory 104 may be connected to the processor 102, and may store various pieces of information related to the operation of the processor 102. For example, the memory 104 may store software codes including instructions for executing part or all of the processing controlled by the processor 102 or for executing the description, functions, processes, proposals, methods and / or operation flow diagrams disclosed herein. Here, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a radio communication technology (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and may send and / or receive radio signals via at least one antenna 108. The transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be replaced by a radio frequency (RF) unit. In this specification, a wireless device may refer to a communication modem / circuit / chip.

[0337] The processor 102 is included in the NCR including the network control repeater (NCR)-mobile terminal (MT) and NCR-Fwd (forwarding). The processor 102 performs an initial access process with the base station through the NCR-MT of the NCR including the NCR-MT and the NCR-Fwd, receives a control message related to a beam indication for an access link between the NCR-Fwd and the UE from the base station through the NCR-MT, and performs at least one of a first forwarding operation of amplifying a first signal received from the UE and forwarding it to the base station and a second forwarding operation of amplifying a second signal received from the base station and forwarding it to the UE based on the control message and through the NCR-Fwd. The control message includes a list of forwarding resources capable of performing at least one of the first forwarding operation and the second forwarding operation, and each forwarding resource included in the list is defined as a beam index and a time resource.

[0338] The second wireless device 200 includes at least one processor 202 and at least one memory 204, and may also include at least one transceiver 206 and / or at least one antenna 208. The processor 202 may be configured to control the memory 204 and / or the transceiver 206, and implement the description, function, process, proposal, method and / or operation flow disclosed herein. For example, the processor 202 may process the information in the memory 204 to generate a third information / signal, and then may transmit a radio signal including the third information / signal through the transceiver 206. In addition, the processor 202 may receive a radio signal including a fourth information / signal through the transceiver 206, and may store information obtained from signal processing of the fourth information / signal in the memory 204. The memory 204 may be connected to the processor 202, and may store various pieces of information related to the operation of the processor 202. For example, the memory 204 may store software codes including instructions for executing part or all of the processing controlled by the processor 202 or for executing the description, function, process, proposal, method and / or operation flow chart disclosed herein. Here, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a radio communication technology (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and may send and / or receive radio signals via at least one antenna 208. The transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be replaced by an RF unit. In this specification, a wireless device may refer to a communication modem / circuit / chip.

[0339] The processor 202 is included in the base station. The processor 202 performs an initial access procedure with the NCR-MT of the NCR including the NCR-MT and the NCR-Fwd, sends a control message related to the beam indication for the access link between the NCR-Fwd and the UE to the NCR-MT, and receives a signal from the NCR-Fwd or sends a signal to the NCR-Fwd based on the control message. The control message includes a list of forwarding resources for the forwarding operation of the NCR-Fwd, and each forwarding resource included in the list is defined as a beam index and a time resource.

[0340] Hereinafter, the hardware elements of the wireless devices 100 and 200 are described in detail. At least one protocol layer may be implemented by, but is not limited to, at least one processor 102 and 202. For example, at least one processor 102 and 202 may implement at least one layer (e.g., a functional layer such as a PHY, MAC, RLC, PDCP, RRC, and SDAP layer). The at least one processor 102 and 202 may generate at least one protocol data unit (PDU) and / or at least one service data unit (SDU) according to the description, function, process, proposal, method, and / or operation flowchart disclosed herein. At least one processor 102 and 202 may generate a message, control information, data, or information according to the description, function, process, proposal, method, and / or operation flowchart disclosed herein. At least one processor 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the function, process, proposal, and / or method disclosed herein, and may provide the signal to at least one transceiver 106 and 206. At least one processor 102 and 202 can receive a signal (e.g., a baseband signal) from at least one transceiver 106 and 206 and obtain a PDU, SDU, message, control information, data, or information according to the description, functions, processes, proposals, methods, and / or operational flow charts disclosed herein.

[0341] At least one processor 102 and 202 may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. At least one processor 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, at least one application specific integrated circuit (ASIC), at least one digital signal processor (DSP), at least one digital signal processing device (DSPD), at least one programmable logic device (PLD), or at least one field programmable gate array (FPGA) may be included in at least one processor 102 and 202. One or more processors 102 and 202 may be implemented as at least one computer readable medium (CRM) including instructions executed by at least one processor.

[0342] That is, the CRM executes the steps of performing an initial access procedure with a base station through the NCR-MT of the NCR including the NCR-MT and the NCR-Fwd, receiving a control message related to a beam indication for an access link between the NCR-Fwd and the UE from the base station through the NCR-MT, and performing at least one of a first forwarding operation of amplifying a first signal received from the UE and forwarding it to the base station and a second forwarding operation of amplifying a second signal received from the base station and forwarding it to the UE based on the control message and through the NCR-Fwd. At this time, the control message includes a list of forwarding resources capable of performing at least one of the first forwarding operation and the second forwarding operation, and each forwarding resource included in the list is defined as a beam index and a time resource.

[0343] The description, functions, processes, proposals, methods and / or operational flowcharts disclosed herein may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, functions, etc. Firmware or software configured to execute the description, functions, processes, proposals, methods and / or operational flowcharts disclosed herein may be included in at least one processor 102 and 202, or may be stored in at least one memory 104 and 204 and may be executed by at least one processor 102 and 202. The description, functions, processes, proposals, methods and / or operational flowcharts disclosed herein may be implemented using firmware or software in the form of codes, instructions and / or instruction sets.

[0344] At least one memory 104 and 204 may be connected to at least one processor 102 and 202 and may store various forms of data, signals, messages, information, programs, codes, instructions and / or commands. At least one memory 104 and 204 may be configured as ROM, RAM, EPROM, flash memory, hard disk drive, register, cache, computer-readable storage medium and / or a combination thereof. At least one memory 104 and 204 may be disposed inside and / or outside of at least one processor 102 and 202. In addition, at least one memory 104 and 204 may be connected to at least one processor 102 and 202 via various technologies such as wired or wireless connections.

[0345] At least one transceiver 106 and 206 can send user data, control information, radio signals / channels, etc. mentioned in the method and / or operation flow chart disclosed in this article to at least one different device. At least one transceiver 106 and 206 can receive user data, control information, radio signals / channels, etc. mentioned in the description, function, process, proposal, method and / or operation flow chart disclosed in this article from at least one different device. For example, at least one transceiver 106 and 206 can be connected to at least one processor 102 and 202, and can send and receive radio signals. For example, at least one processor 102 and 202 can control at least one transceiver 106 and 206 to send user data, control information or radio signals to at least one different device. In addition, at least one processor 102 and 202 can control at least one transceiver 106 and 206 to receive user data, control information or radio signals from at least one different device. At least one transceiver 106 and 206 may be connected to at least one antenna 108 and 208, and may be configured to send or receive user data, control information, radio signals / channels, etc. mentioned in the description, function, process, proposal, method and / or operation flow chart disclosed herein through at least one antenna 108 and 208. In this document, at least one antenna may be a plurality of physical antennas or may be a plurality of logical antennas (e.g., antenna ports). At least one transceiver 106 and 206 may convert received radio signals / channels from RF band signals into baseband signals so as to process received user data, control information, radio signals / channels, etc. using at least one processor 102 and 202. At least one transceiver 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using at least one processor 102 and 202 from baseband signals into RF band signals. To this end, at least one transceiver 106 and 206 may include (analog) oscillators and / or filters.

[0346] Fig.21 An example of the structure of the signal processing module is shown in FIG. Fig. 20 Signal processing is performed in processors 102 and 202.

[0347] Reference Fig.21 , a transmitting device in a UE or BS (e.g., a processor, a processor and a memory, or a processor and a transceiver) may include a scrambler 3001, a modulator 302, a layer mapper 303, an antenna port mapper 304, a resource block mapper 305, and a signal generator 306.

[0348] The transmitting device may transmit one or more codewords. The coded bits in each codeword are scrambled by the corresponding scrambler 301 and transmitted on the physical channel. The codeword may be referred to as a data string and may be equivalent to a transport block which is a data block provided by the MAC layer.

[0349] The modulator 302 may modulate the scrambled bits into complex-valued modulation symbols. The modulator 302 may modulate the scrambled bits according to a modulation scheme to arrange complex-valued modulation symbols representing positions on a signal constellation diagram. The modulation scheme is not limited, and the coded data may be modulated using m-PSK (m-phase shift keying) or m-QAM (m-quadrature amplitude modulation). The modulator may be referred to as a modulation mapper.

[0350] The complex-valued modulation symbols may be mapped to one or more transmission layers by a layer mapper 303. The complex-valued modulation symbols on each layer may be mapped by an antenna port mapper 304 to be transmitted on an antenna port.

[0351] Each resource block mapper 305 can map the complex-valued modulation symbol for each antenna port to an appropriate resource element in a virtual resource block allocated for transmission. The resource block mapper can map the virtual resource block to a physical resource block according to an appropriate mapping scheme. The resource block mapper 305 can allocate the complex-valued modulation symbol for each antenna port to an appropriate subcarrier and multiplex the complex-valued modulation symbol according to the user.

[0352] Each signal generator 306 can modulate a complex-valued modulation symbol, i.e., an antenna-specific symbol, for each antenna port according to a specific modulation scheme (e.g., OFDM (Orthogonal Frequency Division Multiplexing)) to generate a complex-valued time-domain OFDM symbol signal. The signal generator can perform IFFT (Inverse Fast Fourier Transform) on the antenna-specific symbol, and can insert a CP (Cyclic Prefix) into the time-domain symbol on which IFFT has been performed. The OFDM symbol is subjected to digital-to-analog conversion and up-conversion, and then sent to the receiving device through each transmitting antenna. The signal generator may include an IFFT module, a CP insertion unit, a digital-to-analog converter (DAC), and an up-converter.

[0353] Fig. 22 Another example of the structure of the signal processing module in the transmitting device is shown. Fig. 20 Signal processing is performed in a processor of a UE / BS such as the processors 102 and 202 of the UE / BS.

[0354] Reference Fig. 22 , a transmitting device (e.g., a processor, a processor and a memory, or a processor and a transceiver) in a UE or a BS 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.

[0355] The sending device may scramble the coded bits in the codeword through the corresponding scrambler 401, and then send the scrambled coded bits through the physical channel.

[0356] The scrambled bits are modulated into complex-valued modulation symbols by the modulator 402. The modulator may modulate the scrambled bits according to a predetermined modulation scheme to arrange complex-valued modulation symbols representing positions on a signal constellation diagram. The modulation scheme is not limited, and π / 2-BPSK (π / 2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), or m-QAM (m-Quadrature Amplitude Modulation) may be used to modulate the encoded data.

[0357] The complex-valued modulation symbols may be mapped to one or more transmission layers by a layer mapper 403 .

[0358] The complex-valued modulation symbols on each layer may be precoded by the precoder 404 so as to be transmitted on the antenna port. Here, the precoder may perform transform precoding on the complex-valued modulation symbols and then perform precoding. Alternatively, the precoder may perform precoding without transform precoding. The precoder 404 may process the complex-valued modulation symbols according to MIMO using multiple transmit antennas to output antenna-specific symbols and assign 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 the N×M precoding matrix W. Here, N is the number of antenna ports and M is the number of layers.

[0359] Each resource block mapper 405 maps the complex-valued modulation symbols for each antenna port to appropriate resource elements in the virtual resource block allocated for transmission.

[0360] The resource block mapper 405 may allocate complex-valued modulation symbols to appropriate subcarriers and multiplex the complex-valued modulation symbols according to users.

[0361] Each signal generator 406 can modulate the complex-valued modulation symbol according to a specific modulation scheme (e.g., OFDM) to generate a complex-valued time-domain OFDM symbol signal. The signal generator 406 can perform IFFT (Inverse Fast Fourier Transform) on the antenna-specific symbol, and can insert a CP (Cyclic Prefix) into the time-domain symbol that has been subjected to IFFT. The OFDM symbol is subjected to digital-to-analog conversion and up-conversion, and then sent to the receiving device through each transmitting antenna. The signal generator 406 may include an IFFT module, a CP insertion unit, a digital-to-analog converter (DAC), and an up-converter.

[0362] The signal processing process of the receiving device may be the inverse process of the signal processing process of the transmitting device. Specifically, the processor of the transmitting device decodes and demodulates the RF signal received through the antenna port of the transceiver. The receiving device may include multiple receiving antennas, and the signals received by the receiving antennas are restored to baseband signals, which are then multiplexed and demodulated according to MIMO to be restored to data strings intended to be sent by the transmitting device. The receiving device may include: a signal recovery unit that restores the received signal to a baseband signal; a multiplexer that is used to combine and multiplex the received signals; and a channel demodulator that is used to demodulate the multiplexed signal string into corresponding codewords. The signal recovery unit, the multiplexer, and the channel demodulator may be configured as an integrated module or an independent module for performing their functions. More specifically, the signal recovery unit may include: an analog-to-digital converter (ADC) for converting an analog signal into a digital signal; a CP removal unit for removing CP from the digital signal; a FET module for applying FFT (Fast Fourier Transform) to the signal from which the CP has been removed to output a frequency domain signal; 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 sent by a transmitting device by a channel demodulator.

[0363] Fig.23 An example of a wireless communication device according to an implementation example of the present disclosure is illustrated.

[0364] Reference Fig.23 , a wireless communication device (e.g., UE) 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 keyboard 2320, a global positioning system (GPS) chip 2360, a sensor 2365, a memory 2330, a subscriber identity module (SIM) card 2325, a speaker 2345, and a microphone 2350. A plurality of antennas and a plurality of processors may be provided.

[0365] The processor 2310 may implement the functions, processes, and methods described in this specification. Fig.23 The processor 2310 in may be Fig. 20 Processors 102 and 202 in.

[0366] The memory 2330 is connected 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 connected to the processor through various technologies such as wired connection and wireless connection. Fig.23The memory 2330 may be Fig. 20 The memories 104 and 204 in FIG.

[0367] The user can input various types of information such as a phone number using various techniques such as pressing a button of the keypad 2320 or starting a voice using the microphone 2350. The processor 2310 can receive and process the user information and perform appropriate functions such as making a call using the input phone number. In some scenarios, data can be obtained from the SIM card 2325 or the memory 2330 to perform appropriate functions. In some scenarios, the processor 2310 can display various types of information and data on the display 2315 for the convenience of the user.

[0368] The transceiver 2335 is connected to the processor 2310 and transmits and / or receives RF signals. The processor can control the transceiver to start communication or transmit RF signals including various types of information or data such as voice communication data. The transceiver includes a transmitter and a receiver for sending and receiving RF signals. Antenna 2340 can facilitate the transmission and reception of RF signals. In some implementation examples, when the transceiver receives an RF signal, the transceiver can forward the signal and convert it to a baseband frequency for processing performed by the processor. The signal can be processed by various techniques such as conversion into audible or readable information so as to be output through the speaker 2345. The transceiver in Figure 33 can be the transceivers 106 and 206 in Figure 30.

[0369] Although in Fig.23 Although not shown in the figure, various components such as a camera and a universal serial bus (USB) port may be additionally included in the UE. For example, the camera may be connected to the processor 2310.

[0370] Fig.23 is an example of an implementation method for a UE, and the implementation example of the present disclosure is not limited thereto. The UE does not necessarily need to include Fig.23 That is, some of the components (e.g., keyboard 2320, GPS chip 2360, sensor 2365, and SIM card 2325) may not be essential components. In this case, they may not be included in the UE.

[0371] Fig.24 Another example of a wireless device is shown.

[0372] according to Fig.24 , the 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 .

[0373] Fig. 20 An example of a wireless device described in Fig.24 The example of the wireless device described in the embodiment is different in that the processors 102 and 202 and the memories 104 and 204 are in Fig. 20 are separate in Fig.24 In the example of , the memories 104 and 204 are included in the processors 102 and 202. That is, the processor and the memory may constitute a chipset.

[0374] Fig.25 Another example of a wireless device applied to the present specification is shown. The wireless device can be implemented in various forms according to use cases / services.

[0375] Reference Fig.25 , the wireless devices 100 and 200 may correspond to Fig. 20 The wireless device 100 and 200 may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a storage unit 130 and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include one or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Fig. 20 The control unit 120 is electrically connected to the communication unit 110, the storage unit 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 can control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the storage unit 130. In addition, the control unit 120 can send the information stored in the storage unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through the wireless / wired interface, or store the information received from the outside (e.g., other communication devices) via the communication unit 110 through the wireless / wired interface in the storage unit 130.

[0376] The additional component 140 may be configured in various ways depending on the type of the wireless device. For example, the additional component 140 may include at least one of a power unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be implemented in the following forms without limitation: a robot ( Fig.26 100a), vehicles ( Fig.26 100b-1 and 100b-2), XR devices ( Fig.26 100c), handheld device ( Fig.26 100d), household appliances ( Fig.26100e), IoT devices ( Fig.26 100f), digital broadcast UE, hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig.26 400), BS( Fig.26 200), network nodes, etc. Depending on the use case / service, the wireless device can be used in a mobile or fixed place.

[0377] exist Fig.25 In the wireless devices 100 and 200, all of the various elements, components, units / parts and / or modules in the wireless devices 100 and 200 may be connected to each other through a wired interface, or at least a part thereof may be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be connected by wire, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected through the communication unit 110. In addition, each element, component, unit / part and / or module within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be constructed by a set of one or more processors. For example, the control unit 120 may be constructed by a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. For another example, the storage unit 130 may be constructed by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0378] Fig.26 The communication system 1 applied to this specification is exemplified.

[0379] Reference Fig.26, the communication system 1 applied to the present specification includes a wireless device, a base station (BS) and a network. Herein, the wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR)) or long term evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include, but is not limited to, a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices and may be implemented in the form of head mounted devices (HMDs), head up displays (HUDs) installed in vehicles, televisions, smart phones, computers, wearable devices, home appliance devices, digital signage, vehicles, robots, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0380] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without passing through the BS / network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). In addition, an IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0381] Wireless communication / connection 150a, 150b or 150c can be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Herein, wireless communication / connection can be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication) or inter-BS communication (e.g., relay, integrated access and backhaul (IAB)). The wireless device and the BS / wireless device can send / receive radio signals to each other through wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b can send / receive signals through various physical channels. To this end, various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping) and at least a portion of the resource allocation process can be performed based on various proposals of the present disclosure.

[0382] NR supports multiple parameter sets (or multiple subcarrier spacing (SCS) ranges) to support various 5G services. For example, when the SCS is 15kHz, it supports wide areas in traditional cellular bands; when the SCS is 30kHz / 60kHz, it supports dense cities, lower latency and wider carrier bandwidth; when the SCS is 60kHz or higher, it supports bandwidths greater than 24.25GHz to overcome phase noise.

[0383] The NR frequency band may be defined as two types of frequency ranges (FR1 and FR2). The value of the frequency range may be changed. For example, the two types of frequency ranges (FR1 and FR2) may be as shown in Table 5. For ease of description, FR1 in the frequency range used for the NR system may refer to "a range below 6 GHz", and FR2 may refer to "a range above 6 GHz" and may be referred to as millimeter wave (mmW).

[0384] [Table 5]

[0385] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 450MHz–6000MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0386] As illustrated above, the value of the frequency range of the NR system may be changed. For example, FR1 may include a frequency band from 410 MHz to 7125 MHz as shown in Table 6 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or more. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or more included in FR1 may include an unlicensed frequency band. The unlicensed frequency band may be used for various purposes, for example, for communication of vehicles (e.g., autonomous driving).

[0387] [Table 6]

[0388] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410MHz–7125MHz 15, 30, 60kHz FR2 24250MHz–52600MHz 60, 120, 240kHz

[0389] The claims disclosed in this specification can be combined in various ways. For example, the technical features in the method claims of this specification can be combined to be implemented or performed in a device, and the technical features in the device claims of this specification can be combined to be implemented or performed in a method. In addition, the technical features in the method claims and device claims of this specification can be combined to be implemented or performed in a device. In addition, the technical features in the method claims and device claims of this specification can be combined to be implemented or performed in a method.

Claims

1. A method for operating an NCR including an NCR-MT and an NCR-Fwd in a wireless communication system, wherein: The NCR is a network control repeater, the NCR-MT is an NCR-mobile terminal, the NCR-Fwd is an NCR-forwarding, and the operation method is characterized in that: receiving a control message related to a beam indication for an access link between the NCR-Fwd and a user equipment from a base station through the NCR-MT; and Based on the control message and through the NCR-Fwd, the forwarding operation is performed. The control message includes a list of forwarding resources capable of performing the forwarding operation, and each forwarding resource included in the list is defined as a beam index and a time resource.

2. The method according to claim 1, characterized in that: The above time resources are defined as i) a starting time slot defined by a time slot offset; ii) a starting symbol defined by a symbol offset within a time slot; and iii) an interval, ie, a duration, defined by the number of symbols.

3. The method according to claim 1, characterized in that The period is configured for the list through the control message, and the period is applied to all forwarding resources included in the list.

4. The method according to claim 1, characterized in that: The reference SCS is configured for the above-mentioned list through the above-mentioned control message, and the above-mentioned reference SCS is applied to all forwarding resources included in the above-mentioned list, wherein the SCS is a subcarrier spacing.

5. The method according to claim 1, characterized in that The control message is an RRC signal, wherein the RRC is a radio resource control.

6. The method according to claim 1, characterized in that A beam based on the beam index is applied to the time resource.

7. The method according to claim 1, characterized in that The control message includes a plurality of lists of forwarding resources capable of performing the forwarding operation.

8. The method according to claim 7, characterized in that receiving a MAC-CE, wherein the MAC-CE is a medium access control-control element, The MAC-CE activates one of the multiple lists.

9. The method according to claim 1, characterized in that: The forwarding operation includes at least one of a first forwarding operation of amplifying a first signal received from the user equipment and forwarding the signal to the base station or a second forwarding operation of amplifying a second signal received from the base station and forwarding the signal to the user equipment.

10. An NCR comprising an NCR-MT and an NCR-Fwd, wherein: The NCR is a network control repeater, the NCR-MT is an NCR-mobile terminal, the NCR-Fwd is an NCR-forwarding, and the NCR is characterized in that it includes: at least one transceiver; at least one memory; and at least one processor, which is operably combined with the at least one memory and the at least one transceiver, At least one of the above processors receiving a control message related to a beam indication for an access link between the NCR-Fwd and a user equipment from a base station through the NCR-MT; and Based on the control message and through the NCR-Fwd, the forwarding operation is performed. The control message includes a list of forwarding resources capable of performing the forwarding operation, and each forwarding resource included in the list is defined as a beam index and a time resource.

11. The NCR according to claim 10, characterized in that: The above time resources are defined as i) a starting time slot defined by a time slot offset; ii) a starting symbol defined by a symbol offset within a time slot; and iii) an interval, ie, a duration, defined by the number of symbols.

12. The NCR according to claim 10, characterized in that: The period is configured for the list through the control message, and the period is applied to all forwarding resources included in the list.

13. The NCR according to claim 10, characterized in that: The reference SCS is configured for the above-mentioned list through the above-mentioned control message, and the above-mentioned reference SCS is applied to all forwarding resources included in the above-mentioned list, wherein the SCS is a subcarrier spacing.

14. The NCR according to claim 10, characterized in that: The control message is an RRC signal, wherein the RRC is a radio resource control.

15. The NCR according to claim 10, characterized in that: A beam based on the beam index is applied to the time resource.

16. The NCR according to claim 10, characterized in that: The control message includes a plurality of lists of forwarding resources capable of performing the forwarding operation.

17. The NCR according to claim 16, characterized in that: The processor receives a MAC-CE through the NCR-MT, wherein the MAC-CE is a media access control-control element. The MAC-CE activates one of the multiple lists.

18. The NCR according to claim 10, characterized in that: The forwarding operation includes at least one of a first forwarding operation of amplifying a first signal received from the user equipment and forwarding the signal to the base station or a second forwarding operation of amplifying a second signal received from the base station and forwarding the signal to the user equipment.

19. An NCR device comprising NCR-MT and NCR-Fwd, wherein: The NCR is a network control repeater, the NCR-MT is an NCR-mobile terminal, the NCR-Fwd is an NCR-forwarding, and the device is characterized in that it includes: at least one memory; and at least one processor operatively associated with the at least one memory, At least one of the above processors receiving a control message related to a beam indication for an access link between the NCR-Fwd and a user equipment from a base station through the NCR-MT; and Based on the control message and through the NCR-Fwd, the forwarding operation is performed. The control message includes a list of forwarding resources capable of performing the forwarding operation, and each forwarding resource included in the list is defined as a beam index and a time resource.

20. At least one computer readable medium CRM comprising instructions executed by at least one processor, characterized in that receiving a control message related to a beam indication for an access link between an NCR-Fwd of an NCR and a user equipment from a base station through an NCR-MT, the NCR including the NCR-MT and the NCR-Fwd, wherein the NCR is a network controlled repeater, the NCR-MT is an NCR-mobile terminal, and the NCR-Fwd is an NCR-forwarding; and Based on the control message and through the NCR-Fwd, the forwarding operation is performed. The control message includes a list of forwarding resources capable of performing the forwarding operation, and each forwarding resource included in the list is defined as a beam index and a time resource.

21. A method for operating a base station in a wireless communication system, characterized in that: Sending a control message related to a beam indication for an access link between an NCR-Fwd of an NCR and a user equipment to an NCR-MT, the NCR including the NCR-MT and the NCR-Fwd, wherein the NCR is a network controlled repeater, the NCR-MT is an NCR-mobile terminal, and the NCR-Fwd is an NCR-forwarding; and receiving a signal from the NCR-Fwd or sending a signal to the NCR-Fwd based on the control message, The control message includes a list of forwarding resources used for the forwarding operation of the NCR-Fwd, and each forwarding resource included in the list is defined as a beam index and a time resource.

22. A base station, characterized in that: It includes: at least one transceiver; at least one memory; and at least one processor, which is operably combined with the at least one memory and the transceiver, At least one of the above processors Sending a control message related to a beam indication for an access link between an NCR-Fwd of an NCR and a user equipment to an NCR-MT, the NCR including the NCR-MT and the NCR-Fwd, wherein the NCR is a network controlled repeater, the NCR-MT is an NCR-mobile terminal, and the NCR-Fwd is an NCR-forwarding; and receiving a signal from the NCR-Fwd or sending a signal to the NCR-Fwd based on the control message, The control message includes a list of forwarding resources used for the forwarding operation of the NCR-Fwd, and each forwarding resource included in the list is defined as a beam index and a time resource.

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