Method for performing communication in wireless communication system by device and device for same

Abstract

According to various embodiments, a method for performing communication by an apparatus in a wireless communication system and an apparatus for the method are disclosed. A method for performing communication in a wireless communication system by an apparatus comprises the steps of: establishing a control link for receiving control information from a base station and a forwarding link for forwarding a signal received from a terminal; determining a power amplification gain for the forwarding link; and forwarding a signal received from the terminal to the base station through the forwarding link based on a power amplification gain, where the power amplification gain is determined based on the power control information established for the control link.

Description

Technical Field

[0001] The present disclosure relates to a method for a device to perform communication in a wireless communication system and a device used for the method. Background Art

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

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

[0004] Technical issues

[0005] An object to be achieved is to provide a method and apparatus for efficiently determining a power amplification gain for a forwarding link based on power control information on a control link.

[0006] Those skilled in the art will understand that the purposes that can be achieved using various embodiments of the present disclosure are not limited to those specifically described above, and the above and other purposes that can be achieved by various embodiments of the present disclosure will be more clearly understood from the following detailed description.

[0007] Technical Solution

[0008] According to one aspect of the present disclosure, a method for performing communication by an apparatus in a wireless communication system is provided, the method comprising the following steps: configuring a control link for receiving control information from a base station (BS) and a forwarding link for forwarding a signal received from a user equipment (UE); determining a power amplification gain for the forwarding link; and forwarding the signal received from the UE to the BS through the forwarding link based on the power amplification gain. The power amplification gain may be determined based on power control information configured for the control link.

[0009] Alternatively, the power amplification gain may be determined based on one power parameter among a plurality of power parameters included in the power control information.

[0010] Alternatively, the one power parameter may be preconfigured as a power parameter related to the path loss among the plurality of power parameters.

[0011] Alternatively, the power amplification gain may be determined based on a resource index of a downlink reference signal included in the power control information.

[0012] Alternatively, the power amplification gain may be determined based on the power control information associated with a sounding reference signal (SRS) for the control link.

[0013] Alternatively, the power amplification gain may be determined based on the power control information associated with a physical random access channel (PRACH) for the control link.

[0014] Alternatively, the power amplification gain may be determined by applying at least one of a predetermined weight or an offset to a first transmission power for an uplink signal of the control link calculated based on the power control information.

[0015] Alternatively, the BS may indicate the predetermined weight and the offset through Radio Resource Control (RRC) signaling or Downlink Control Information (DCI).

[0016] Alternatively, the method may further include the step of reporting information on a power amplification gain compared to a maximum power amplification gain to the BS.

[0017] Alternatively, the device may be a Network Controlled Repeater (NCR).

[0018] In another aspect of the present disclosure, a device for performing communication in a wireless communication system is provided herein, the device comprising: a memory configured to store instructions; and a processor configured to perform operations by executing the instructions. The operations of the processor include: configuring a control link for receiving control information from a base station (BS) and a forwarding link for forwarding a signal received from a user equipment (UE), determining a power amplification gain for the forwarding link, and forwarding the signal received from the UE to the BS through the forwarding link based on the power amplification gain. The power amplification gain can be determined based on the power control information configured for the control link.

[0019] In another aspect of the present disclosure, a chipset for performing communication in a wireless communication system is provided herein, the chipset comprising: at least one processor; and at least one memory, the at least one memory being operatively connected to the at least one processor and configured to cause the at least one processor to perform operations when executed. The operations include: configuring a control link for receiving control information from a base station (BS) and a forwarding link for forwarding a signal received from a user equipment (UE), determining a power amplification gain for the forwarding link, and forwarding the signal received from the UE to the BS through the forwarding link based on the power amplification gain. The power amplification gain may be determined based on power control information configured for the control link.

[0020] Beneficial Effects

[0021] Various embodiments can efficiently determine the power amplification gain for the forwarding link based on the power control information about the control link.

[0022] Alternatively, various embodiments do not require separate signaling for controlling the power amplification gain for the forwarding link by determining the power amplification gain for the forwarding link based on power control information on the control link, thereby minimizing the signaling load of control information on the forwarding link.

[0023] The effects to be achieved by the embodiments are not limited to the contents specifically described above, and those skilled in the art to which the embodiments belong will more clearly understand other effects not mentioned herein according to the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and together with the description serve to explain the principle of the disclosure.

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

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

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

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

[0029] Figure 5 An example of mapping physical channels in time slots is illustrated.

[0030] Figure 6 An exemplary PDCCH transmission / reception procedure is illustrated.

[0031] Figure 7 An example of a process for controlling uplink transmit power is shown.

[0032] Figure 8 Examples of parent links and child links are schematically illustrated.

[0033] Fig. 9 is a diagram illustrating an example of a topology in which a network controlled relay (NCR) performs transmission and reception between a gNB and a UE.

[0034] Fig.10 is a diagram illustrating a radio frequency (RF) repeater and an NCR.

[0035] Fig.11 The invention is a flow chart illustrating a method in which a device determines a power amplification gain for a forwarding link.

[0036] Fig.12 A communication system applied to the present disclosure is illustrated.

[0037] Fig.13 A wireless device suitable for use with the present disclosure is illustrated.

[0038] Fig.14 Another example of a wireless device to which the present disclosure is applied is illustrated. DETAILED DESCRIPTION

[0039] A wireless communication system is a multiple-access system that supports communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of multiple-access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access systems (SC-FDMA) systems, multi-carrier frequency division multiple access (MC-FDMA) systems, and the like.

[0040] Sidelink refers to a communication scheme that establishes a direct link between user equipments (UEs) to directly exchange voice or data between UEs without assistance from a base station (BS). Sidelink is seen as a way to resolve the burden on the BS caused by the rapidly increasing data traffic.

[0041] Vehicle-to-everything (V2X) refers to the communication technology of exchanging information with other vehicles, pedestrians and infrastructure objects through wired / wireless communication. V2X can be divided into four types: vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N) and vehicle-to-pedestrian (V2P). V2X communication can be provided through PC5 interface and / or Uu interface.

[0042] As more and more communication devices require greater communication capacity when sending and receiving signals, there is a need for improved mobile broadband communications relative to traditional radio access technologies. Therefore, communication systems that take into account services / UEs that are sensitive to reliability and latency are being discussed. The next generation of radio access technologies that take into account enhanced mobile broadband communications, massive MTC, and ultra-reliable and low-latency communications (URLLC) may be referred to as new radio access technologies (RATs) or new radios (NRs). Even in NRs, V2X communications may be supported.

[0043] The techniques described herein can be used for various wireless access systems such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA), etc. CDMA can be implemented as a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented as a radio technology such as Global System for Mobile Communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rate for GSM Evolution (EDGE). OFDMA can be implemented as a radio technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc. UTRA is part of Universal Mobile Telecommunications System (UMTS). The 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is a part of Evolved UMTS (E-UMTS) using Evolved UTRA (E-UTRA). 3GPP LTE adopts OFDMA for downlink and SC-FDMA for uplink. LTE-A is the evolution of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0044] 5G NR is the successor technology of LTE-A and is a new clean-state mobile communication system characterized by high performance, low latency, and high availability. 5G NR can use all available spectrum resources, including low frequency bands below 1 GHz, mid-frequency bands between 1 GHz and 10 GHz, and high frequency (millimeter) bands of 24 GHz or more.

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

[0046] Figure 1The structure of the LTE system to which the present disclosure is applicable is illustrated. This may also be referred to as an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) or an LTE / LTE-A system.

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

[0048] The eNBs 20 may be connected to each other via an X2 interface. The eNBs 20 are connected to an Evolved Packet Core (EPC) 39 via an S1 interface. More specifically, the eNBs 20 are connected to a Mobility Management Entity (MME) via an S1-MME interface, and to a Serving Gateway (S-GW) via an S1-U interface.

[0049] The EPC 30 includes an MME, an S-GW, and a packet data network gateway (P-GW). The MME has access information or capability information about the UE, which is mainly used for mobility management of the UE. The S-GW is a gateway with the E-UTRAN as an endpoint, and the P-GW is a gateway with a packet data network (PDN) as an endpoint.

[0050] Based on the lowest three layers of the open system interconnection (OSI) reference model known in communication systems, the radio protocol stack between the UE and the network can be divided into layer 1 (L1), layer 2 (L2), and layer 3 (L3). These layers are defined in pairs between the UE and the evolved UTRAN (E-UTRAN) for data transmission via the Uu interface. The physical (PHY) layer at L1 provides information transfer services on physical channels. The radio resource control (RRC) layer at L3 is used to control radio resources between the UE and the network. For this purpose, the RRC layer exchanges RRC messages between the UE and the eNB.

[0051] Figure 2 The structure of the NR system to which the present disclosure is applicable is illustrated.

[0052] Reference Figure 2 , the next generation radio access network (NG-RAN) may include next generation Node Bs (gNBs) and / or eNBs that provide user plane and control plane protocol terminations to the UE. Figure 3In the figure, for example, NG-RAN is shown as including only gNB. gNB and eNB are connected to each other via Xn interface. gNB and eNB are connected to 5G core network (5GC) via NG interface. More specifically, gNB and eNB are connected to access and mobility management function (AMF) via NG-C interface, and to user plane function (UPF) via NG-U interface.

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

[0054] Reference Figure 3 , a radio frame can be used for UL transmission and DL transmission in NR. The length of a radio frame is 10ms and can be defined by two 5ms half frames. HF may include five 1ms subframes. A subframe may be divided into one or more slots, and the number of slots in a SF may be determined according to a subcarrier spacing (SCS). Each slot may include 12 or 14 OFDM (A) symbols depending on a cyclic prefix (CP).

[0055] In the case of normal CP (NCP), each time slot may include 14 symbols, and in the case of extended CP (ECP), each time slot may include 12 symbols. Herein, a symbol may be an OFDM symbol (or CP-OFDM symbol) or an SC-FDMA symbol (or DFT-s-OFDM symbol).

[0056] Table 1 below lists the number of symbols N per time slot according to the SCS configuration μ in the NCP case slot symb , the number of time slots per frame N frame,u slot And the number of time slots N in each subframe subframe,u slot .

[0057] [Table 1]

[0058]

[0059]

[0060] The following Table 2 lists the number of symbols per time slot, the number of time slots per frame, and the number of time slots per subframe according to SCS in the ECP case.

[0061] [Table 2]

[0062] <![CDATA[SCS(15*2 u )]]> <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 60KHz(u=2) 12 40 4

[0063] In the NR system, different OFDM(A) parameter sets (e.g., SCS, CP length, etc.) may be configured for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of a time resource (e.g., a subframe, a time slot, or a TTI) (collectively referred to as a time unit (TU) for convenience) including the same number of symbols may be configured to be different for the aggregated cells.

[0064] In NR, various parameter sets or SCS can be supported to support various 5G services. For example, with an SCS of 15kHz, wide areas in traditional cellular bands can be supported, while with an SCS of 30kHz / 60kHz, dense urban areas, lower latency, and wide carrier bandwidths can be supported. When the SCS is 60kHz or higher, bandwidths wider than 24.25GHz can be supported to overcome phase noise.

[0065] The NR frequency band may be defined by two types of frequency ranges FR1 and FR2. The two types of frequency ranges may be FR1 and FR2. The numerical values ​​of the frequency ranges may be changed. For example, the two types of frequency ranges may be configured as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 may mean "a range below 6 GHz", and FR2 may mean "a range above 6 GHz", and may be referred to as millimeter wave (mmW).

[0066] [Table 3]

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

[0068] As mentioned above, the value of the frequency range of the NR system can be changed. For example, FR1 may include a frequency band of 410 MHz to 7125 MHz as shown in Table 24 below. That is, FR1 may include a frequency band of 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz (or 5850 MHz, 5900 MHz, 5925 MHz, etc.) or higher included in FR1 may include an unlicensed frequency band. The unlicensed frequency band can be used for various purposes, for example, for vehicle communications (e.g., autonomous driving).

[0069] [Table 4]

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

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

[0072] Reference Figure 4, a time slot includes multiple symbols in the time domain. For example, a time slot may include 14 symbols in the normal CP case and 12 symbols in the extended CP case. Alternatively, a time slot may include 7 symbols in the normal CP case and 6 symbols in the extended CP case.

[0073] A carrier may include multiple subcarriers in the frequency domain. A resource block (RB) is defined as a plurality of consecutive subcarriers (e.g., 12 subcarriers) in the frequency domain. A bandwidth part (BWP) may be defined as a plurality of consecutive (P) RBs in the frequency domain, and a BWP may correspond to a parameter set (e.g., SCS, CP length, etc.). A carrier may include up to N (e.g., 5) BWPs. Data communication may be performed in an activated BWP. In a resource grid, each element may be referred to as a resource element (RE) and may be mapped to a complex symbol.

[0074] The wireless interface between UEs or the wireless interface between UE and the network may include L1 layer, L2 layer and L3 layer. In various embodiments of the present disclosure, L1 layer may represent a physical layer. L2 layer may represent at least one of a MAC layer, an RLC layer, a PDCH layer or an SDAP layer. L3 layer may represent an RRC layer, for example.

[0075] Bandwidth Part (BWP)

[0076] In an NR system, each component carrier (CC) can support up to 400MHz. If a UE operating on a wideband CC always utilizes RF operation for all enabled CCs, the battery power consumption of the UE may increase. Alternatively, considering various use cases (e.g., eMBB, URLLC, mMTC, V2X, etc.) operating within a wideband CC, different parameter sets (e.g., subcarrier spacing) may be supported for different frequency bands within a specific CC. Alternatively, the capabilities for maximum bandwidth may be different between UEs. In view of this, the BS may instruct the UE to operate only in part of the bandwidth, rather than in the entire bandwidth of the wideband CC. For simplicity, a partial bandwidth is defined as a bandwidth part (BWP). Here, a BWP may be composed of resource blocks (RBs) that are continuous on the frequency axis and may correspond to a parameter set (e.g., subcarrier spacing, CP length, slot / mini-slot duration).

[0077] The BS may configure multiple BWPs in one CC configured for the UE. For example, a BWP occupying a relatively small frequency domain may be configured in the PDCCH monitoring time slot, and the PDSCH indicated by the PDCCH in the larger BWP may be scheduled. Alternatively, when the UE is concentrated in a specific BWP, some of the UEs may be configured in another BWP to balance the load. Alternatively, considering the frequency domain inter-cell interference elimination between adjacent cells, the spectrum in the middle of the entire bandwidth may be punctured and the two BWPs on both sides may be configured in the same time slot. That is, the BS may configure at least one DL / UL BWP for the UE associated with the broadband CC (through L1 signaling, MAC CE or RRC signaling, etc.), and activate at least one DL / UL BWP among the configured DL / UL BWPs at a specific time. The BS may instruct the UE to switch to another configured DL / UL BWP (through L1 signaling, MAC CE or RRC signaling, etc.). Alternatively, when the timer expires, the UE may switch to a predetermined DL / UL BWP. The activated DL / UL BWP is defined as the activated DL / UL BWP. During the initial access procedure or before establishing an RRC connection, the UE may not be able to receive the DL / UL BWP configuration. The DL / UL BWP assumed by the UE in this situation is defined as the initially activated DL / UL BWP.

[0078] Figure 5 An example of mapping physical channels in time slots is illustrated.

[0079] The time slot may include a DL control channel, DL or UL data, a UL control channel, etc., all of which are included. For example, the first N symbols in the time slot may be used to send a DL control channel (hereinafter referred to as a DL control region), and the last M symbols in the time slot may be used to send a UL control channel (hereinafter referred to as an UL control region). N and M are each integers greater than or equal to 0. The resource area (hereinafter referred to as a data area) between the DL control region and the UL control region may be used for DL ​​data transmission or UL data transmission. The time gap for DL ​​to UL or UL to DL switching may exist between the control region and the data region. PDCCH may be sent in the DL control region, and PDSCH may be sent in the DL data region. Some symbols of the time when switching from DL to UL in the time slot may be used as time gaps.

[0080] In the NR system, a frame is characterized by a self-contained structure in which a DL control channel, DL or UL data, and UL channels can all be included in one time slot. For example, the first N symbols of a time slot can be used to carry a DL channel (e.g., PDCCH) (hereinafter referred to as the DL control region), and the last M symbols of the time slot can be used to carry a UL channel (e.g., PUCCH) (hereinafter referred to as the UL control region). Each of N and M is an integer equal to or greater than 0. The resource region (hereinafter referred to as the data region) between the DL control region and the UL control region can be used to send DL data (e.g., PDSCH) or UL data (e.g., PUSCH). The guard period (GP) provides a time gap for switching from a transmit mode to a receive mode or from a receive mode to a transmit mode. Some symbols in a subframe when switching from DL to UL can be configured as GPs.

[0081] PDCCH transmits DCI. For example, PDCCH (i.e., DCI) may carry information about the transmission format and resource allocation of the DL shared channel (DL-SCH), resource allocation information of the uplink shared channel (UL-SCH), paging information about the paging channel (PCH), system information about DL-SCH, information about resource allocation of high-level control messages (e.g., RAR sent on PDSCH), transmit power control commands, information about the activation / release of the configured scheduling, etc. DCI includes a cyclic redundancy check (CRC). The CRC is masked using various identifiers (IDs) (e.g., radio network temporary identifier (RNTI)) according to the owner or purpose of the PDCCH. For example, if the PDCCH is used for a specific UE, the CRC is masked by the UE ID (e.g., cell-RNTI (C-RNTI)). If the PDCCH is used for a paging message, the CRC is masked by the paging-RNTI (P-RNTI). If the PDCCH is for system information (eg, system information block (SIB)), the CRC is masked by a system information RNTI (SI-RNTI). When the PDCCH is for RAR, the CRC is masked by a random access-RNTI (RA-RNTI).

[0082] Figure 6 An exemplary PDCCH transmission / reception procedure is illustrated.

[0083] Reference Figure 6, the BS may send a control resource set (CORESET) configuration to the UE (S502). A CORESET is defined as a set of resource element groups (REGs) with a given parameter set (e.g., subcarrier spacing (SCS), cyclic prefix (CP) length, etc.). A REG is defined by one (physical) resource block (P)RB as one OFDM symbol. Multiple CORESETs for one UE may overlap with each other in the time / frequency domain. A CORESET may be configured by system information (e.g., a master information block (MIB)) or high-level signaling (e.g., radio resource control (RRC) signaling). For example, configuration information about a specific common CORESET (e.g., CORESET#0) may be sent in the MIB. For example, a PDSCH carrying system information block 1 (SIB1) may be scheduled by a specific PDCCH, and CORESET#0 may be used to send a specific PDCCH. The system information (SIB1) broadcast in a cell includes cell-specific PDSCH configuration information, PDSCH-ConfigCommon. PDSCH-ConfigCommon includes a list (or lookup table) of parameters related to time domain resource allocation, pdsch-TimeDomainAllocationList. Each pdsch-TimeDomainAllocationList can include up to 16 entries (or rows), each entry is jointly encoded {K0, PDSCH mapping type, PDSCH start symbol and length (SLIV)}. In addition to the pdsch-TimeDomainAllocationList configured by PDSCH-ConfigCommon, the pdsch-TimeDomainAllocationList can also be provided by the UE-specific PDSCH configuration, PDSCH-Config. The structure of the UE-specific configured pdsch-TimeDomainAllocationList is the same as the structure of the pdsch-TimeDomainAllocationList provided by the UE publicly. For K0 and SLIV of the pdsch-TimeDomainAllocationList, refer to the following description.

[0084] In addition, configuration information about CORESET#N (e.g., N>0) may be sent through RRC signaling (e.g., cell-common RRC signaling, UE-specific RRC signaling, etc.). For example, UE-specific RRC signaling carrying CORESET configuration information may include (but is not limited to) various types of signaling, such as RRC establishment message, RRC reconfiguration message, and / or BWP configuration information. Specifically, the CORESET configuration may include the following information / fields.

[0085] -controlResourceSetId: indicates the ID of the CORESET.

[0086] -frequencyDomainResources: Indicates the frequency domain resources of the CORESET. The resources are indicated by a bitmap where each bit corresponds to an RB group (= 6 (contiguous) RBs). For example, the most significant bit (MSB) of the bitmap corresponds to the first RB group in the BWP. The RB group corresponding to the bit with a bit value of 1 is allocated as the frequency domain resource of the CORESET.

[0087] -duration: Indicates the time domain resource of CORESET. It indicates the number of consecutive OFDM symbols included in CORESET. duration has a value between 1 and 3.

[0088] -cce-REG-MappingType: indicates the control channel element (CCE) to REG mapping type. Both interleaved and non-interleaved types are supported.

[0089] -interleaverSize: Indicates the interleaver size.

[0090] -pdcch-DMRS-ScramblingID: indicates a value used for PDCCH DMRS initialization. When pdcch-DMRS-ScramblingID is not included, the physical cell ID of the serving cell is used.

[0091] -precoderGranularity: Indicates the precoder granularity in the frequency domain.

[0092] -reg-BundleSize: Indicates the REG bundle size.

[0093] -tci-PresentInDCI: indicates whether the transmission configuration index (TCI) field is included in the DL-related DCI.

[0094] -tci-StatesPDCCH-ToAddList: indicates a subset of TCI states configured in pdcch-Config for providing a quasi co-location (QCL) relationship between DL RSs and PDCCH DMRS ports in an RS set (TCI state).

[0095] In addition, the BS may send a PDCCH search space (SS) configuration to the UE (S504). The PDCCH SS configuration may be sent through high-layer signaling (e.g., RRC signaling). For example, the RRC signaling may include (but is not limited to) various types of signaling, such as an RRC setup message, an RRC reconfiguration message, and / or BWP configuration information. Although for convenience of description, in Figure 5 In the embodiment, the CORESET configuration and the PDCCH SS configuration are shown to be signaled separately, but the present disclosure is not limited thereto. For example, the CORESET configuration and the PDCCH SS configuration may be sent in one message (eg, through one RRC signaling) or may be sent separately in different messages.

[0096] The PDCCH SS configuration may include information about the configuration of a PDCCH SS set. A PDCCH SS set may be defined as a set of PDCCH candidates monitored (e.g., blindly detected) by a UE. One or more SS sets may be configured for a UE. Each SS set may be a UE-specific search space (USS) set or a common search space (CSS) set. For convenience, a PDCCH SS set may be referred to as an "SS" or a "PDCCH SS".

[0097] The PDCCH SS set includes PDCCH candidates. PDCCH candidates are CCEs that the UE monitors to receive / detect PDCCH. Monitoring includes blind decoding (BD) of PDCCH candidates. One PDCCH (candidate) includes 1, 2, 4, 8 or 16 CCEs depending on the aggregation level (AL). One CCE includes 6 REGs. Each CORESET configuration is associated with one or more SSs, and each SS is associated with one CORESET configuration. One SS is defined based on the SS configuration, and the SS configuration may include the following information / fields.

[0098] -searchSpaceId: indicates the ID of the SS.

[0099] -controlResourceSetId: Indicates the CORESET associated with the SS.

[0100] - monitoringSlotPeriodicityAndOffset: indicates the periodicity (in time slots) and offset (in time slots) of PDCCH monitoring.

[0101] -monitoringSymbolsWithinSlot: Indicates the first OFDM symbol used for PDCCH monitoring in a slot configured with PDCCH monitoring. The first OFDM symbol used for PDCCH monitoring is indicated by a bitmap where each bit corresponds to an OFDM symbol in the slot. The MSB of the bitmap corresponds to the first OFDM symbol of the slot. The OFDM symbol corresponding to the bit set to 1 corresponds to the first symbol of the CORESET in the slot.

[0102] -nrofCandidates: indicates the number of PDCCH candidates per AL (one of the values ​​0, 1, 2, 3, 4, 5, 6 and 8), where AL = {1, 2, 4, 8, 16}.

[0103] -searchSpaceType: Indicates CSS or USS and the DCI format used in the corresponding SS type.

[0104] Subsequently, the BS may generate a PDCCH and send the PDCCH to the UE (S506), and the UE may monitor the PDCCH candidates in one or more SSs to receive / detect the PDCCH (S508). The timing (e.g., time / frequency resources) at which the UE is to monitor the PDCCH candidates is defined as a PDCCH (monitoring) timing. One or more PDCCH (monitoring) timings may be configured in a time slot.

[0105] Table 5 shows the characteristics of each SS.

[0106] [Table 5]

[0107]

[0108]

[0109] Table 6 shows the DCI format transmitted on the PDCCH.

[0110] [Table 6]

[0111]

[0112] DCI format 0_0 can be used to schedule TB-based (or TB-level) PUSCH, and DCI format 0_1 ​​can be used to schedule TB-based (or TB-level) PUSCH or code block group (CBG)-based (or CBG-level) PUSCH. DCI format 1_0 can be used to schedule TB-based (or TB-level) PDSCH, and DCI format 1_1 can be used to schedule TB-based (or TB-level) PDSCH or CBG-based (or CBG-level) PDSCH (or DL ​​grant DCI). DCI format 0_0 / 0_1 can be called UL grant DCI or UL scheduling information, and DCI format 1_0 / 1_1 can be called DL grant DCI or DL ​​scheduling information. DCI format 2_0 is used to transmit dynamic slot format information (e.g., dynamic slot format indicator (SFI)) to the UE, and DCI format 2_1 is used to transmit DL preemption information to the UE. DCI format 2_0 and / or DCI format 2_1 can be transmitted to a corresponding group of UEs on a group common PDCCH (a PDCCH pointing to a group of UEs).

[0113] DCI format 0_0 and DCI format 1_0 may be referred to as fallback DCI formats, while DCI format 0_1 ​​and DCI format 1_1 may be referred to as non-fallback DCI formats. Under the fallback DCI format, the DCI size / field configuration remains the same regardless of the UE configuration. In contrast, under the non-fallback DCI format, the DCI size / field configuration varies according to the UE configuration.

[0114] The CCE-to-REG mapping type is configured as one of an interleaved CCE-to-REG type and a non-interleaved CCE-to-REG type.

[0115] - Non-interleaved CCE to REG mapping (or localized CCE to REG mapping) ( Figure 5 ): 6 REGs for a given CCE are grouped into one REG bundle, and all REGs for a given CCE are contiguous. One REG bundle corresponds to one CCE.

[0116] - Interleaved CCE to REG mapping (or distributed CCE to REG mapping) ( Figure 6 ): 2, 3, or 6 REGs for a given CCE are grouped into one REG bundle, and the REG bundles are interleaved within a CORESET. In a CORESET that includes one or two OFDM symbols, a REG bundle includes 2 or 6 REGs, and in a CORESET that includes three OFDM symbols, a REG bundle includes 3 or 6 REGs. The REG bundle size is set based on the CORESET.

[0117] Figure 7 An example of a process for controlling uplink transmit power is shown.

[0118] First, a user equipment (UE) may receive parameters and / or information related to transmit power (Tx power) from a base station (BS) (P05). In this case, the UE may receive corresponding parameters and / or information through high-layer signaling (e.g., RRC signaling or MAC-CE). For example, regarding PUSCH transmission, PUCCH transmission, SRS transmission, and / or PRACH transmission, the UE may receive parameters and / or information related to Tx power control.

[0119] Then, the UE may receive a TPC command (TPC command) related to Tx power from the BS (P10). In this case, the UE may receive the corresponding TPC command through lower layer signaling (e.g., DCI), etc. For example, regarding PUSCH transmission, PUCCH transmission, and / or SRS transmission, the UE may receive information about a TPC command to be used for determining a power control adjustment state, etc., through a TPC command field of a predefined DCI format. However, in the case of PRACH transmission, the corresponding step may be omitted.

[0120] The UE may then determine (or calculate) Tx power (P15) for uplink transmission based on the parameters, information, and / or TPC commands received from the BS. For example, the UE may determine PUSCH Tx power (or PUCCH Tx power, SRS Tx power, and / or PRACH Tx power) based on the following formula 1. And / or, when two or more uplink channels and / or signals need to be transmitted overlappingly (e.g., in a case such as carrier aggregation), the UE may also determine Tx power for uplink transmission while considering a priority order (priority), etc.

[0121] Then, the UE may transmit one or more uplink channels and / or signals (eg, PUSCH, PUCCH, SRS, or PRACH) to the BS based on the determined (or calculated) Tx power (P20).

[0122] Hereinafter, contents related to power control will be described.

[0123] In a wireless communication system, if necessary, the Tx power of a UE (e.g., a user equipment (UE)) and / or a mobile device may need to be increased or decreased. In this way, the control of the Tx power of the UE and / or the mobile device may be referred to as uplink power control. For example, the Tx power control method may be applied to meet requirements (e.g., SNR (signal-to-noise ratio), BER (bit error rate), or BLER (block error rate)) in a BS (e.g., a gNB, an eNB, etc.).

[0124] The above-mentioned power control can be performed in an open-loop power control scheme and a closed-loop power control scheme.

[0125] Specifically, the open-loop power control scheme refers to a method of controlling Tx power without feedback from a transmitting device (e.g., BS) to a receiving device (e.g., UE) and / or feedback from a receiving device to a transmitting device. For example, the UE may receive a specific channel / signal (pilot channel / signal) from the BS, and may use the received channel / signal to estimate the strength of the received power. Then, the UE may control the Tx power using the estimated strength of the received power.

[0126] In contrast, a closed-loop power control scheme refers to a method of controlling Tx power based on feedback from a transmitting device to a receiving device and / or feedback from a receiving device to a transmitting device. For example, a BS may receive a specific channel / signal from a UE and may determine an optimal power level for the UE based on a power level, SNR, BER, BLER, etc. measured through the received specific channel / signal. The BS may transmit information (i.e., feedback) about the determined optimal power level to the UE through a control channel, etc., and the corresponding UE may control Tx power using the feedback provided by the BS.

[0127] Hereinafter, a power control method for a case in which a UE and / or a mobile device performs uplink transmission on a BS in a wireless communication system will be described.

[0128] Specifically, hereinafter, a power control method for transmission of 1) UL data channel (e.g., PUSCH (Physical Uplink Shared Channel)), 2) uplink control channel (e.g., PUCCH (Physical Uplink Control Channel)), 3) sounding reference signal (SRS), and 4) random access channel (e.g., PRACH (Physical Random Access Channel)) will be described. In this case, (i) a transmission timing (i.e., a transmission time unit) for PUSCH, PUCCH, SRS, and / or PRACH may be defined by a slot index (n_s) in a frame of a system frame number (SFN), a first symbol (S) in a slot, the number of consecutive symbols (L), and the like.

[0129] Hereinafter, for convenience of description, the power control method will be described based on the case where the UE performs PUSCH transmission. Needless to say, the corresponding method can be widely applied to other UL data channels supported in the wireless communication system.

[0130] In the case of PUSCH transmission in the activated (active) UL bandwidth part (UL BWP) of the carrier (f) of the serving cell (c), the UE may calculate a linear power value of the Tx power determined using the following formula 2. Then, the UE may control the Tx power in consideration of the number of antenna ports and / or the number of SRS ports.

[0131] Specifically, when PUSCH transmission is performed in the activated UL BWP (b) of the carrier (f) of the serving cell (c) using the parameter set configuration based on index j and the PUSCH power control adjustment state based on index l, the UE can determine the PUSCH Tx power P in the PUSCH transmission opportunity (i) based on the following formula 1: PUSCH,b,f,c (i,j,q d ,l)(dBm).

[0132] [Formula 1]

[0133]

[0134] [dBm]

[0135] In Formula 1, index j may refer to an index to an open-loop power control parameter (e.g., Po or α) and may be configured to have a maximum of 32 parameter sets per cell, index q_d may refer to an index to a DL RS resource used for PathLoss (PL) measurement and may be configured to have a maximum of 4 measurements per cell, and index l may refer to an index to a closed-loop power control process and may be configured to have a maximum of 2 processes per cell.

[0136] Specifically, Po may be a parameter broadcast as part of system information and may indicate a target received power on the receiving side. The corresponding Po value may be configured taking into account UE throughput, cell capacity, noise and / or interference. In addition, α may indicate a rate at which compensation for path loss is performed. α may be set to a value from 0 to 1, and full path loss compensation or fractional path loss compensation may be performed according to the set value. In this case, the α value may be set taking into account interference and / or data rate between UEs. In addition, P CMAX,f,c (i) may represent the configured UE Tx power. For example, the configured UE Tx power may be interpreted as the 'configured maximum UE output power' defined in 3GPP TS 38.101-1 and / or TS38.101-2. In addition, The bandwidth of the PUSCH resource allocation represented by the number of resource blocks (RBs) used for PUSCH transmission opportunities based on the subcarrier spacing may be indicated. In addition, the f related to the PUSCH power control adjustment state may be configured or indicated based on the TPC command field of the DCI (e.g., DCI format 0_0, DCI format 0_1, DCI format 2_2, or DCI format 2_3). b,f,c (i,l).

[0137] In this case, a specific RRC (Radio Resource Control) parameter (e.g., SRI-PUSCHPowerControl-Mapping) may indicate a link between the SRI (SRS Resource Indicator) field of the DCI (Downlink Control Information) and the above-mentioned indexes j, q_d, and l. In other words, the above-mentioned indexes j, l, and q_d may be associated with a beam, panel, and / or spatial domain transmission filter based on specific information. Through this, PUSCH Tx power control may be performed in units of beams, panels, and / or spatial domain transmission filters.

[0138] The parameters and / or information for the above-mentioned PUSCH power control may be configured separately (i.e., independently) for each BWP. In this case, the corresponding parameters and / or information may be configured or indicated by high-level signaling (e.g., RRC signaling or medium access control-control element (MAC-CE)) and / or DCI. For example, the parameters and / or information for PUSCH power control may be transmitted by RRC signaling PUSCH-ConfigCommon, PUSCH-PowerControl, etc.

[0139] IAB (Integrated Access / Backhaul)

[0140] Figure 7 An example of a network with such integrated access and backhaul links is shown, where an IAB node or relay node (rTRP) can multiplex the access and backhaul links in time, frequency, or space (e.g., beam-based operation).

[0141] The operation of different links can be on the same or different frequencies (also known as "in-band" and "out-of-band" relaying). Efficient support of out-of-band relaying is important in some NR deployment scenarios, but it is very important to understand the in-band operation requirements, which imply close interaction with access links operating on the same frequency, to accept duplex constraints and avoid / mitigate interference.

[0142] Additionally, operating NR systems in mmWave spectrum may present several unique challenges, including experiencing severe short-term congestion, which may not be easily mitigated by current RRC-based handover mechanisms due to the larger timescale required to complete the process compared to short-term congestion.

[0143] To overcome short-term congestion in mmWave systems, fast RAN-based mechanisms (which do not necessarily require core network intervention) may be needed for inter-rTRP exchanges.

[0144] The need to mitigate short-term congestion of NR operations in the mmWave spectrum, with the need to more easily deploy self-backhauled NR cells, may lead to the need to develop an integrated framework that enables fast switching of access and backhaul links.

[0145] Additionally, over-the-air (OTA) coordination between rTRPs may be considered to mitigate interference and support end-to-end routing selection and optimization.

[0146] The following requirements and aspects may need to be addressed by integrated access and radio backhaul (IAB) for NR.

[0147] - Efficient and flexible operation of in-band and out-of-band broadcasts in indoor and outdoor scenarios

[0148] -Multi-hop and redundant connections

[0149] - End-to-end routing and optimization

[0150] -Backhaul link support with high spectral efficiency

[0151] - Legacy NR UE support

[0152] The conventional NR (new RAT) is designed to support half-duplex devices. In addition, half-duplex for IAB scenarios is supported and is worth targeting. In addition, full-duplex IAB devices can be studied.

[0153] In the IAB scenario, if each IAB node or relay node (RN) does not have scheduling capability, the donor gNB (DgNB) must schedule all links between the DgNB-related RNs and the UE. In other words, the DgNB can collect service information from all related RNs, make scheduling decisions for all links, and then notify each RN of the scheduling information.

[0154] Figure 8 Examples of parent links and child links are schematically illustrated.

[0155] like Figure 8 As shown, the link between the IAB node and the parent node is called the parent link, and the link between the IAB node and the child node / UE is called the child link. That is, the link between the MT and the parent DU is called the parent link, and the link between the DU and the child MT / UE is called the child link.

[0156] However, depending on interpretation or perspective, the link between the IAB node and the parent node may be referred to as a backhaul link, and the link between the IAB node and the child node / UE may be referred to as an access link.

[0157] The IAB node may receive a timeslot format configuration for communicating with a parent node and a timeslot format configuration for communicating with a child node / access UE.

[0158] In the existing IAB node, TDM operation in which DU and MT operate through different time resources has been performed. On the other hand, for efficient resource operation, resource multiplexing such as SDM / FDM, FC, etc. is required between DU and MT. Figure 8 As shown, the link between the IAB node (IAB MT) and the parent node is called the parent link, and the link between the IAB node (IAB DU) and the child node (child MT) is called the child link. At this time, the TDM operation between the parent link and the child link has been discussed, and the SDM / FDM and FD operations are being discussed.

[0159] DU and MT present in the same IAB node (or co-location) cannot operate simultaneously due to intra-node interference, time slot / symbol boundary misalignment, power sharing, etc., but can operate in TDM. On the other hand, multiplexing of SDM / FDM can be used between DU and MT. This multiplexing is suitable for example cases where there is almost no interference between panels because DU and MT use different panels. In this case, DU and MT present in the same IAB node (or co-location) can send or receive data or information at the same time, but each of DU and MT cannot perform transmission and reception at the same time or receive and transmit at the same time.

[0160] Alternatively, FD can be used between DU and MT. This is applicable to the case where there is little interference between DU and MT (for example, when the frequency domain in which the DU operates is far away from the frequency domain in which the MT operates). In this case, the DU and MT present in the same IAB node (or co-located) can freely send and receive data at the same time. The DU and MT can send or receive data at the same time, and each of the DU and MT can also perform sending and receiving at the same time or performing receiving and sending at the same time.

[0161] There may be N MT-CCs and M DU-cells in an IAB node. Fig.10 An example is shown in which an IAB node consists of three MT-CCs (where N=3) and three DU-cells (where M=3). The MT-CCs present in the IAB node may operate through the same or different frequency resources, and one MT-CC may be connected to one or more parent DU-cells. The DU-cells present in the IAB node may operate through the same or different frequency resources.

[0162] For a specific MT-CC / DU-cell pair within the IAB node, for the following four Tx / Rx direction combinations, the MT-CC and DU-cell may adopt a TDM relationship or a non-TDM relationship, and for each Tx / Rx combination, TDM or non-TDM may vary.

[0163] -DU-Tx / MT-Tx

[0164] -DU-Rx / MT-Rx

[0165] -DU-Tx / MT-Rx

[0166] -DU-Rx / MT-Tx

[0167] For example, for a specific MT-CC / DU-cell pair, all of the four Tx / Rx combinations may operate in TDM. In this case, the corresponding DU-cell and the corresponding MT-CC should always operate in TDM regardless of the Tx / Rx direction of the DU-cell and the MT-CC. In another example, for a specific MT-CC / DU-cell pair, all of the four Tx / Rx combinations may operate in non-TDM. In this case, the corresponding DU-cell and MT-CC may always operate simultaneously in non-TDM regardless of the Tx / Rx direction of the DU-cell and the MT-CC. In another example, for a specific MT-CC / DU-cell pair, DU-Tx / MT-Tx and DU-Rx / MT-Rx may operate in non-TDM, and DU-Tx / MT-Rx and DU-Rx / MT-Tx may operate in TDM. The above operations relate to a method (e.g., SDM / FDM) for allowing simultaneous operation when the Tx / Rx directions of the DU-cell and the MT-CC are the same, and the method can operate simultaneously when the Tx / Rx directions of the DU-cell and the MT-CC are the same. For each specific MT-CC / DU-cell pair within the IAB node, TDM / non-TDM information for each Tx / Rx combination can be configured / determined differently or independently.

[0168] At this time, the IAB MT may be connected to two parent DUs using, for example, a dual connectivity method or a DAPS-HO method.

[0169] Network Controlled Repeater (NCR) in NR

[0170] Coverage is a fundamental aspect of cellular network deployment. Mobile operators rely on different types of network nodes to provide comprehensive coverage in their deployment. The deployment of conventional full-stack cells is an option, but it may not always be possible (e.g., without the availability of backhaul) or economically viable. As a result, new types of network nodes are considered to increase the flexibility of network deployment for mobile operators. For example, integrated access and backhaul (IAB), a new type of network node that does not require a wired backhaul, was introduced in Rel-16 and enhanced in Rel-17. Another type of network node is an RF repeater, which simply amplifies and forwards any signal they receive. RF repeaters have extensive deployment in 2G, 3G, and 4G to supplement the coverage provided by conventional full-stack cells. In Rel-17, RAN4 specifies RF and EMC requirements for such RF repeaters for NR targeting both FR1 and FR2. Although RF repeaters provide a cost-effective means of extending network coverage, they have their limitations. RF repeaters simply perform amplification and forwarding operations without being able to consider various factors that can improve performance. These factors may include information about semi-static and / or dynamic downlink / uplink configurations, adaptive transmitter / receiver spatial beamforming, ON-OFF states, etc.

[0171] A network-controlled repeater is an enhancement of a conventional RF repeater with the ability to receive and process side control information from the network. The side control information may allow the network-controlled repeater to perform its amplification and forwarding operations in a more efficient manner. Potential benefits may include reduced unnecessary noise amplification, transmission and reception with better spatial directionality, and simplified network integration.

[0172] Fig. 9 is a diagram illustrating an example of a topology in which a network controlled relay (NCR) performs transmission and reception between a gNB and a UE.

[0173] Reference Fig. 9 , NCR may include a radio unit (RU) and a mobile terminal (MT).

[0174] The gNB may include a central unit (CU) and / or a distributed unit (DU), and the NCR may be connected to the gNB. In the NCR, the MT may form a control link with the gNB, and the RU may form a forwarding link for backhaul with the gNB and a forwarding link for access with the UE.

[0175] The RU of the NCR may consist of only the RF layer. The RU may receive a signal sent by the gNB through a forwarding link at the RF end, and may forward the received signal to the UE. As a result, the signal received from the UE may be received by the RF end, and the received signal may be forwarded to the gNB. The RU may send signals only between the gNB and the UE, and may not generate signals / channels by itself and send the generated signals / channels to the gNB / UE. Alternatively, the RU receives signals / channels from the gNB / UE but does not detect the received signals / channels. In order to forward the received signals, the RU may control the direction of the Tx / Rx beam, the DL / UL direction, ON / OFF information, the transmit (Tx) power, etc. at the RF end. However, this RU operation cannot be determined by the NCR itself, but may be fully controlled by the gNB.

[0176] The MT of the above-mentioned NCR may include an RF layer and L1, L2 and / or L3 layers. For example, the MT may include only an RF layer and an L1 layer, or may include L1 and L2 layers. Alternatively, the MT may include an RF layer and L1 / L2 / L3 layers. The MT may detect / receive a signal / channel sent by the gNB, and may generate a signal / channel to be sent to the gNB. In addition, the MT may receive information required to control the operation of the RU (e.g., side control information) from the gNB. In addition, the MT may not perform transmission and reception with the UE.

[0177] Fig.10 is a diagram illustrating a radio frequency (RF) repeater and an NCR.

[0178] Reference Fig.10 (a), existing RF repeaters can perform beamforming that applies omnidirectional or fixed direction. Fig.10 (b), the NCR can adaptively adjust the transmit / receive beam direction of the NCR according to the UE position and the UE's channel conditions, thereby obtaining beamforming gain.

[0179] In addition, in the case of an existing RF repeater, since the DL / UL directions are not distinguished from each other in a TDD system, transmission and reception in the DL and UL directions are always performed simultaneously. Alternatively, only a fixed TDD configuration is applied to the existing RF repeater, so that switching between the DL direction and the UL direction is performed using a fixed time pattern. In contrast, the NCR can perform DL / UL switching while taking into account the TDD configuration. Thus, switching is considered. As a result, the NCR can enable adaptive DL / UL operation, which can minimize power consumption caused by forwarding unnecessary signals, and can also minimize interference.

[0180] In addition, in the case of existing RF repeaters, the power of received signals is always amplified and transmitted regardless of whether the gNB and UE transmit signals. As a result, unnecessary power consumption and interference to the surrounding environment are inevitably increased. In contrast, NCR performs ON / OFF operation, and when there is no signal to be sent to the gNB and UE, the operation of RU is turned off, so as not to transmit unnecessary signals.

[0181] In addition, in the case of existing RF repeaters, the power of the signal received at a fixed ratio is amplified and transmitted. When the signal is transmitted at an unnecessary high power, the interference affecting the surrounding environment can be reduced by reducing the transmission (Tx) power of the NCR. When the signal is transmitted at a low power, the transmission (Tx) power of the NCR is increased so that the signal can be stably transmitted to the receiver.

[0182] In addition, existing RF repeaters have been operating without identifying DL / UL time slot boundaries. On the other hand, in order for the NCR to adaptively adjust beamforming, ON / OFF, DL / UL direction, transmit power, etc. as described above, the NCR must know the transmit / receive (Tx / Rx) boundary of the downlink (DL). As a result, the RU operation can be applied differently for each unit time (e.g., time slot / symbol).

[0183] Side control information for NCR

[0184] In the following, for ease of description, operations in NCR will be assumed. However, the contents described below may be applied to devices outside NCR. Specifically, the contents described below may be applied to operations in RIS. For this reason, the NCR mentioned in the present disclosure may be replaced with "RIS" and expanded / interpreted. In this case, the RU may be used to forward signals from the gNB to the UE in the RIS, and to forward signals from the UE to the gNB in ​​the RIS, and the MT may be used to receive side control information required for signal transmission of the control RU from the gNB. At this time, the term "network" may be interpreted as "gNB" or "CU / DU" hereinafter. In addition, the term "gNB" may be interpreted as "network", "CU" or "DU" hereinafter.

[0185] In order for the NCR to forward the signal received by the RU, it is possible to consider adjusting the direction of the transmit / receive (Tx / Rx) beam, DL / UL direction, ON / OFF state, transmit (Tx) power, etc. at the RF end. However, the RU operation cannot be determined by the NCR itself, but can be completely controlled by the gNB. To this end, the MT can receive the information required to control the RU operation (i.e., side control information) from the gNB. The side control information can be sent through L1 / L2 signaling such as MAC-CE and DCI.

[0186] The above-mentioned side control information may include all or part of the following information.

[0187] - Beamforming information: Information about the transmit / receive (Tx / Rx) beam direction of the RU

[0188] Here, the beamforming information may include a beam direction for UL transmission to the gNB, a beam direction for DL ​​reception from the gNB, a beam direction for DL ​​transmission to the UE, and / or a beam direction for UL reception from the UE.

[0189] - Timing information for aligning the transmit / receive boundaries of the Network Controlled Repeater (NCR): Information for aligning the RU with the transmit / receive (Tx / Rx) slot symbol boundaries

[0190] - Information about UL-DL TDD configuration: Information about the DL / UL direction of the RU

[0191] -ON-OFF information for efficient interference management and improved energy efficiency: Information about the ON-OFF operation of the RU

[0192] -Power control information for efficient interference management: Information about the transmit (Tx) power of the RU, and such information may include the UL transmit (Tx) power to the gNB and / or the DL transmit (Tx) power to the UE.

[0193] In this regard, the following scenario can be considered.

[0194] -NCR-Mobile Terminal (NCR-MT) can be defined as a functional entity that implements the exchange of control information (e.g., side control information) by communicating with the gNB via a control link (C link). The C link is based on the NR Uu interface. For reference, the side control information is at least used to control NCR forwarding.

[0195] -NCR forwarding (NCR-Fwd) is defined as a functional entity that amplifies and forwards UL / DL RF signals between gNB and UE through backhaul link and access link. The operation of NCR-Fwd can be controlled based on the side control information received from the gNB.

[0196] Hereinafter, a power control method of NCR-MT that sends and receives control information in the operation of NCR in the NR environment and NCR-Fwd that serves as a relay between the UE and the gNB will be described.

[0197] UL Tx Power Control with NCR-Fwd

[0198] Since the NCR-MT is expected to send a UL signal to the gNB (or BS) similarly to a legacy UE, UL signal transmission may be performed based on an existing UL Tx power control method. However, unlike the NCR-MT, in the UL Tx power (UL signal Tx power) control of the NCR-Fwd, the NCR-Fwd amplifies and forwards UL signals received from multiple UEs without additional configuration for transmission timing. Therefore, the UL Tx power of the NCR-Fwd is naturally indicated as an amplification gain. Therefore, although it is difficult for the NCR-Fwd to follow the existing UL Tx power control method, since the NCR-Fwd is physically located at the same location as the NCR-MT, the UL Tx power (or UL amplification gain or power amplification gain) of the NCR-Fwd is expected to be similar to the UL Tx power of the NCR-MT.

[0199] In this context, a method of indicating the UL Tx power or the UL amplification gain of the NCR-Fwd will be described in detail below.

[0200] When NCR-Fwd receives a UL signal from a UE and forwards the UL signal to a gNB, the UL Tx power of NCR-Fwd may be indicated by a Tx power amount (e.g., dBm) or by an amplification gain. Hereinafter, a method of indicating UL Tx power by an amplification gain will be described, but this method is a simple calculation method and may be applied to or replaced by a method of indicating UL Tx power by a Tx power amount.

[0201] Here, the indication of the UL amplification gain of the NCR-Fwd may follow the UL Tx power of the NCR-MT (scenario 1), or may be indicated differently from the UL Tx power of the NCR-MT (scenario 2). Hereinafter, scenario 1 and scenario 2 will be described.

[0202] 1. Scenario 1

[0203] Indicating the UL amplification gain of NCR-Fwd each time may result in a loss in signaling overhead. Therefore, the UL amplification gain of NCR-Fwd may be configured corresponding to the UL Tx power of NCR-MT. This method has the advantage of having benefits in terms of signaling overhead and eliminating the need for additional signaling (because the gNB is able to learn the amplification gain of NCR-Fwd through the power headroom (PHR) report of NCR-MT). This method may be reasonable because NCR-MT and NCR-Fwd are physically located in the same location. However, since MCR-MT can determine the Tx power differently according to the signal and / or channel, and the Tx power may change over time according to the channel conditions or indications, it may not be appropriate to directly apply the Tx power of NCR-MT to NCR-Fwd. In addition, although the amplification gain of NCR-Fwd is a relative value (e.g., dB), the UL Tx power of NCR-MT is indicated as an absolute value (dBm). Therefore, as in the following method, the UL amplification gain of NCR-Fwd can be configured in conjunction with the UL Tx power of NCR-MT (eg, a method of configuring the UL amplification gain of NCR-Fwd in association with some Tx power parameters of the UL Tx power of NCR-MT).

[0204] (1) Alt.1-1

[0205] NCR can configure the UL amplification gain of NCR-Fwd based on the UL output power (dBm) configured for NCR-MT or the configured output power (dBm). Here, the difference between the output power of NCR-MT and the configured output power is as follows.

[0206] The configured output power is a UL Tx power value derived from scheduling and calculation for a specific transmission opportunity for the NCR-MT, and may be greater than the maximum output power. On the other hand, the output power is the smaller value between the maximum output power and the configured output power, indicating the actual UL Tx power applied to the actual UL signal transmission at the actual specific transmission opportunity of the NCR-MT. The amplification gain of the NCR-Fwd may be configured corresponding to the configured output power of the NCR-MT. In this case, since the PHR report is calculated based on the configured output power, the gNB can accurately learn the UL amplification gain of the NCR-Fwd through the PHR report of the NCR-MT. Alternatively, if the amplification gain of the NCR-Fwd is configured corresponding to the output power of the NCR-MT, since the size of the output power may be limited by the maximum output power, the UL amplification gain or output power of the NCR-Fwd may naturally be limited by regulations, etc.

[0207] The UL amplification gain of NCR-Fwd can be calculated from the output power of NCR-MT through previous agreements and / or arrangements or from the output power of the configuration of NCR-MT.

[0208] For example, the gNB can commit to the mapping relationship between the output power of the configuration of NCR-MT and the UL amplification gain of NCR-Fwd through previous arrangements, or configure the mapping relationship as operation and management (OAM). Alternatively, the gNB can consider indicating the mapping relationship between the output power of the configuration of NCR-MT and the UL amplification gain of NCR-Fwd through RRC / MAC-CE / DCI. For example, if the output power of the configuration of NCR-MT is X and the UL amplification gain of NCR-Fwd is Y, the gNB can (pre)-configure a table for NCR-MT that maps intervals of X to values of Y. For example, if p ≤ X < q, the gNB can consider configuring p, q, and r for NCR-MT, where Y = r. Alternatively, through previous agreements or arrangements, an equation for deriving the UL amplification gain of NCR-Fwd from the output power of the configuration of NCR-MT can be determined, and the gNB can indicate the parameters related to this equation to NCR-MT through RRC / MAC-CE / DCI. For example, if the output power of the configuration of NCR-MT is X, and Y (which is the UL amplification gain of NCR-Fwd) is calculated in the form of Y = f(X) (where f(X) = aX + b), the gNB can indicate a and / or b to NCR-MT.

[0209] Alternatively, the gNB can also commit to the mapping relationship between the output power of NCR-MT and the amplification gain of NCR-Fwd through previous arrangements, or configure the mapping relationship as OAM. Alternatively, the gNB can consider indicating the mapping relationship between the output power of NCR-MT and the amplification gain of NCR-Fwd through RRC / MAC-CE / DCI. For example, if the output power of NCR-MT is X and the UL amplification gain of NCR-Fwd is Y, the gNB can consider configuring a table for NCR-MT that maps intervals of X to values of Y. For example, if p ≤ X < q and Y = r, the gNB can consider configuring p, q, and r for NCR-MT. Alternatively, through previous agreements or arrangements, an equation for deriving the UL amplification gain of NCR-Fwd from the output power of NCR-MT can be determined, and the gNB can consider indicating the parameters related to this equation to NCR-MT through RRC / MAC-CE / DCI. For example, if the output power of NCR-MT is X, and Y (which is the UL amplification gain of NCR-Fwd) is calculated in the form of Y = f(X) (where f(X) = aX + b), the gNB can indicate a and / or b to NCR-MT.

[0210] (2) Alt.1-2

[0211] The NCR may configure the UL amplification gain of the NCR-Fwd corresponding to the output power (dBm) or the configured output power (dBm) of a specific signal / channel of the NCR-MT.

[0212] Similar to Alt.1-1, the UL amplification gain of NCR-Fwd can be derived from the output power or configured output power of NCR-MT. However, unlike Alt.1-1, the UL amplification gain of NCR-Fwd can be calculated from the output power or configured output power of a specific signal / channel of NCR-MT. For example, the gNB may expect that the UL amplification gain of NCR-Fwd will be configured based on a specific equation or mapping relationship according to the output power or configured output power of one of the PRACH, PUCCH, PUSCH and SRS of NCR-MT. For example, based on the specific equation or mapping relationship corresponding to the above-mentioned Alt.1-1, the UL amplification gain of NCR-Fwd associated with the output power or configured output power of one of the PRACH, PUCCH, PUSCH and SRS of NCR-MT can be indicated or configured for NCR-MT.

[0213] (3) Alt.1-3

[0214] The NCR may configure the UL amplification gain of the NCR-Fwd using only some (or at least one) indexes used for power control of the NCR-MT.

[0215] UL Tx power consists of open loop power control (OLPC) and closed loop power control (CLPC). OLPC can be configured by indicating the configured power and the power used to calculate the path loss from a specific RS and compensate for the path loss. CLPC is used to configure an offset value compared to the previous transmit power and is configured by a transmit power control (TPC) command. In this case, various indexes can be used to indicate the UL Tx power. In this case, the NCT-MT can indicate or configure the UL amplification gain of the NCR-Fwd based on at least one (or only one) of the indexes used to indicate the UL Tx power. For example, the UL Tx power of the PUSCH at transmission opportunity i (Formula 2), the UL Tx power of the PUCCH (Formula 3), the UL Tx power of the SRS (Formula 4), and the UL Tx power of the PRACH (Formula 5) can be determined by the following formula (TS 38.213 7.1.1, 7.2.1, 7.3.1, and 7.4).

[0216] [Formula 2]

[0217]

[0218] [dBm]

[0219] [Formula 3]

[0220]

[0221] [dBm]

[0222] [Formula 4]

[0223]

[0224] [dBm]

[0225] [Formula 5]

[0226] P PRACH,b,f,c (i) = min{P CMAX,f,c (i),P PRACH,target,f,c +PL b,f,c}[dBm]

[0227] For each equation, P O_{PUSCH,PUCCH,SRS} Refers to the power configured by gNB in ​​OLPC, q {d,u,s} Refers to the index of the DL RS used to calculate and compensate for the path loss in OLPC, and l is the index of the CLPC calculation included in the scheduling DCI of PUSCH / PUCCH / SRS or indicated by the group common TPC command in DCI format 2_2. Therefore, in order to indicate the UL amplification gain of NCR-Fwd, some or one of these indexes used to calculate the UL Tx power of NCR-MT can be used to derive the UL amplification gain of NCR Fwd.

[0228] For example, similar to Alt.1-2, the UL amplification gain of NCR-Fwd can be calculated from the configured UL Tx power of a specific signal / channel of NCR-MT, but all parameters of the UL Tx power of NCR-MT may not always be used. That is, the UL amplification gain of NCR-Fwd can be configured or determined based on a preconfigured index or a specific index (or component) among multiple indexes or components used to calculate the UL Tx power of a specific signal / channel of NCR-MT. For example, if the UL amplification gain of NCR-Fwd is Y and the specific parameter value among the PUSCH power control parameters of NCR-MT is X, the UL amplification gain of NCR-Fwd can be derived in the form of Y=f(X). If f(X)=aX+bf(X), the NCR-MT can receive the values ​​of a and / or b indicated or configured by the gNB via RRC / MAC-CE / DCI, etc.

[0229] Alternatively, the NCR-MT may receive from the gNB a table configured to map intervals of X to values ​​of Y. For example, if p≤X<q and Y=r, the NCR-MT may receive p, q, and r configured or indicated by the gNB. Here, X may correspond to the values ​​used in the above equations (Equations 1 to 5). P PRACH,target,f,c (q s ), PL b,f,c (q d ), PL b,f,c 、f b,f,c (i,l),g b,f,c (i,l),h b,f,c (i, l), etc. or at least one of the components or indices.

[0230] When the UL amplification gain of NCR-Fwd is configured corresponding to the UL Tx power of NCR-MT using at least one of Alt.1-1, Alt.1-2, or Alt.1-3, there may be ambiguity about the time line. First, if NCR-MT and NCR-Fwd operate based on UL TDM, ambiguity may occur because NCR-Fwd performs transmission when NCR-MT does not perform transmission. Alternatively, even if NCR-MT and NCR-Fwd do not operate based on UL TDM, the Tx power of NCR-MT may be configured based on the Tx opportunity unit of NCR-MT. However, the time unit for UL transmission of NCR-Fwd may not exist or may be unknown. This is due to the structure of NCR, in which the UL signal received from the UE is amplified and then sent to the gNB according to the characteristics of the repeater. Therefore, in order to eliminate this ambiguity, when the UL amplification gain of NCR-Fwd is derived from the UL Tx power (of a specific signal or channel) of NCR-MT using the methods of Alt.1-1, Alt.1-2 and / or Alt.1-3, the UL amplification gain of NCR-Fwd can be configured corresponding to or based on a predetermined specific timing point.

[0231] Specifically, in all cases of Alt.1-1, Alt.1-2 and Alt.1-3 (when the UL amplification gain of NCR-Fwd is calculated from parameters including a specific index of the configured output power, output power or Tx power control of the NCR-MT), the UL amplification gain of NCR-Fwd can be configured / indicated based on a predetermined specific timing point. For example, the UL amplification gain of NCR-Fwd can be derived or configured based on parameters including a specific index of the configured output power, output power or Tx power control of the NCR-MT at a specific timing point. Here, the specific timing point can be configured or indicated based on a preset time resource (a specific subframe, a specific time slot or a specific symbol) or a preset period and offset. For example, the specific timing point can be determined / indicated based on the period and offset of the configured output power and / or output power of the NCR-MT received from the gNB via RRC / MAC-CE / DCI by the NCR-MT, or the specific timing point can be determined / indicated based on a specific time slot within a predetermined subframe by a previous agreement or arrangement. Alternatively, the specific timing point may be derived from the time indicating the update of the UL Tx power of the NCR-Fwd. The UL amplification gain of the NCR-Fwd may be configured by the methods of Alt.1-1, Alt.1-2 and / or Alt.1-3 based on the UL Tx of the NCR-MT at the specific timing point determined / configured as described above.

[0232] Alternatively, the UL amplification gain of NCR-Fwd may be determined / configured based on the most recent UL Tx power of NCR-MT based on a specific timing point. For example, the UL amplification gain of NCR-Fwd may be configured using the methods of Alt.1-1, Alt.1-2, and / or Alt.1-3 based on the most recent UL Tx power of NCR-MT, the most recent UL Tx power of a specific signal / channel of NCR-MT, or the most recent UL Tx power control parameter of a specific signal / channel of NCR-MT starting from a specific timing point. For example, a specific timing point may be configured based on a preset period and offset. In this case, the UL amplification gain of NCR-Fwd may be determined based on the most recent UL Tx power of a specific signal / channel of NCR-MT or a power control parameter for configuring UL Tx power based on a specific timing point specified according to the period and offset.

[0233] Alternatively, it may not be appropriate to continuously change and configure the Tx power of NCR-Fwd according to the Tx (or Rx) power of NCR-MT. Therefore, the UL Tx power of NCR-Fwd may be updated based on at least one of Alt.1-1, Alt.1-2, or Alt.1-3 only at the indication timing point of the update of the Tx power, at the timing of receiving the indication, or after a preset time from the indication reception timing (e.g., only within a specific timing duration). Alternatively, the UL Tx power of NCR-Fwd may be updated according to the cycle of a specific timing point.

[0234] 2. Scenario 2

[0235] The configuration of the UL amplification gain of the NCR-Fwd may be indicated separately from the UL Tx power of the NCR-MT. In this case, although the UL amplification gain of the NCR-Fwd may be directly received by the NCR-MT from the gNB, the UL amplification gain may also be determined separately from the UL Tx power of the NCR-MT based on at least one of the following rules.

[0236] (1) Alt.2-1

[0237] The UL amplification gain of NCR-Fwd may be determined based on the path loss of a specific signal / channel received by the NCR-MT from the gNB.

[0238] Specifically, the UL amplification gain of NCR-Fwd can be configured or determined based on the DL RS such as SSB / CSI-RS received by the NCR-MT. In this case, the index of the RS used as the basis for configuring the UL amplification gain of NCR-Fwd can be explicitly configured or indicated by the gNB. Alternatively, the index of the RS used as the basis can be implicitly determined or indicated. For example, the NCR (or NCT MT) can receive N SSBs and can distinguish between a set of SSB indexes expected to be received by the NCR-MT and a set of SSB indexes expected to be forwarded to the UE via the NCR-Fwd. In this case, the UL amplification gain of NCR-Fwd can be configured or determined as a power used to compensate for the UL amplification gain based on the received reference signal received power (RSRP) of the set of SSB indexes expected to be forwarded to the UE via the NCR-Fwd. Alternatively, the gNB can indicate the SSB index used to derive the UL amplification gain of NCR-Fwd to the NCR-MT through RRC / MAC-CE / DCI.

[0239] Using the methods of Alt.2-1 and the like (when the UL amplification gain of NCR-Fwd is configured separately from the UL Tx power of NCR-MT), it may be difficult for the gNB to accurately learn the UL amplification gain of NCR-Fwd. Therefore, the NCR-MT may additionally report information about the margin of the UL amplification gain of NCR-Fwd (i.e., the difference between the maximum amplification gain and the current amplification gain) to the gNB through MAC-CE / UCI. The content of the report may also include information about the difference between the maximum output power of the NCR or NCR-Fwd configured due to implementation restrictions or regulatory restrictions and the output power at the reporting timing. The above-mentioned report may be performed at a period configured by a previous arrangement or agreement or at a period indicated by the gNB through RRC / MAC-CE / DCI, or may be triggered by a specific event. The specific event may be a change in the UL amplification gain, an output power margin relative to the maximum output power of the NCR or NCR-Fwd being lower than a specific threshold, or an indication issued by the gNB to perform the report.

[0240] Fig.11 The invention is a flow chart illustrating a method in which a device determines a power amplification gain for a forwarding link.

[0241] Reference Fig.11 , the device may configure a control link for receiving control information from the BS and a forwarding link for forwarding a signal received from the UE (S111). Specifically, the device may correspond to an NCR, which includes an NCR-MT for receiving control information or sending a UL signal via a control link formed with a BS or a gNB and an NCR-Fwd for forming a forwarding link for relaying or amplifying a signal (or UL signal) received from the UE and then forwarding the signal to the BS. The forwarding link may correspond to the aforementioned backhaul link.

[0242] Next, the device may determine a power amplification gain (e.g., the aforementioned UL Tx amplification gain) for forwarding a signal received through the forwarding link (S113). Specifically, as described above, the device may determine the power amplification gain for the forwarding link based on the side control information forwarded by the BS or based on the power control information for determining the Tx power of the UL signal to be sent through the control link.

[0243] For example, the device may determine the power amplification gain based on one of the multiple power parameters included in the power control information. Here, one power parameter may be preconfigured as a power parameter related to the path loss among the multiple power parameters. Alternatively, the device may determine the power amplification gain based on the resource index of the DL reference signal included in the power control information. For example, the device may calculate the path loss based on the signal strength (e.g., RSRP) measured according to the index of the DL reference signal, and determine the power amplification gain based on the power used to compensate for the path loss.

[0244] Alternatively, as described in Scenario 1, the device may determine the power amplification gain as a value mapped to a power parameter based on a predefined table associated with a power parameter. Alternatively, as described in Scenario 1, the device may determine a value calculated by applying a predefined specific equation, weight, offset, etc. to a power parameter as the power amplification gain.

[0245] Alternatively, the power control information related to the control link may include a corresponding power configuration parameter for each UL type. For example, as in equations 2 to 5, the Tx power of the UL signal for the control link can be calculated based on the power configuration parameter configured for each type of UL signal. Therefore, it is necessary to pre-configure the device to consider the power control information of the specific UL signal related to the control link when determining the power amplification gain for the forwarding link. For example, among the multiple UL types for the control link, the specific type of UL signal to be considered when determining the power amplification gain can be pre-configured for the device. As described in scenario 1, a specific type of UL signal can be pre-configured as a type of UL signal in a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), a sounding reference signal (SRS), and a physical random access channel (PRACH). For example, a specific type of UL signal can be pre-configured as SRS or PRACH, and the device can determine the power amplification gain based on the power control parameter for SRS or PRACH in the power control information. If the specific type of UL signal is PRACH, the power amplification gain may be determined based on a power control parameter related to the path loss of the PRACH. In this case, the power amplification gain may be adjusted based on whether a power boost counter related to the PRACH is increased. For example, if a power boost counter related to the PRACH increases, the power amplification gain may be increased by a preset value corresponding to the increase in the power boost counter.

[0246] Alternatively, the device may determine the power amplification gain based on a first Tx power as a UL Tx power for a control link, the first Tx power being calculated based on the power control information (regardless of the type of the UL signal). For example, as described in Scenario 1, the device may determine the power amplification gain as a value mapped to the first Tx power based on a predefined table for each Tx power interval calculated for the UL signal. Alternatively, the device may determine a value obtained by applying a predefined specific equation, weight, or offset to the calculated first Tx power as the power amplification gain, as described in Scenario 1. The predefined specific equation, weight, and offset may be previously indicated, defined, or configured by the BS through Radio Resource Control (RRC) signaling or Downlink Control Information (DCI).

[0247] Next, the device may forward the received signal to the BS through the forwarding link based on the power amplification gain (S115).For example, the device may amplify the signal received from the UE (on the access link) by the determined power amplification gain and then forward the signal through the forwarding link.

[0248] Alternatively, the device may additionally report to the BS information about the relationship between the determined power amplification gain and the maximum power amplification gain. For example, the device may report to the BS information about the difference between the maximum power amplification gain and the power amplification gain. Alternatively, the content of the report may also include information about the difference between the maximum output power of the NCR or NCR-Fwd configured due to implementation restrictions or regulatory restrictions and the output power at the reporting timing. The report may be performed at a period configured by a previous arrangement or agreement or at a period indicated by the gNB through RRC / MAC-CE / DCI, or may be triggered by a specific event. The specific event may be a change in the UL amplification gain, an output power margin relative to the maximum output power of the NCR or NCR-Fwd being lower than a specific threshold, or an indication issued by the gNB to perform the report. In this case, the BS can accurately identify the power amplification gain for the forwarding link through the report.

[0249] By this method, the MCR can determine the amplification gain for NCR-Fwd in combination with the Tx power of the MT, thereby minimizing the signaling load of the side control information. Alternatively, even if the NCR receives a separate indication or configuration of the amplification gain for NCR-Fwd from the BS, a separate reporting process can be defined by which the BS can predict the amplification gain, so that the BS can accurately predict the information about the amplification gain through the report.

[0250] Communication system example to which the present disclosure is applied

[0251] Although not limited thereto, the various descriptions, functions, processes, proposals, methods and / or operational flowcharts of the present disclosure disclosed in this document may be applied to various fields requiring wireless communication / connection (5G) between devices.

[0252] Hereinafter, it will be illustrated in more detail with reference to the accompanying drawings.In the following drawings / descriptions, unless otherwise specified, the same reference numerals may illustrate the same or corresponding hardware blocks, software blocks or functional blocks.

[0253] Fig.12 A communication system applied to the present disclosure is illustrated.

[0254] Reference Fig.12 , the communication system 1 applied to the present disclosure includes a wireless device, a base station (BS), and a network. Herein, the wireless device refers to a device that performs communication using a radio access technology (RAT) (e.g., 5G new RAT (NR) or long term evolution (LTE)), and may be referred to as a communication / radio / 5G device. The wireless device may include (but is not limited to) a robot 100a, vehicles 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing communication between vehicles. Herein, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). XR devices may include augmented reality (AR) / virtual reality (VR) / mixed reality (MR) devices, and may be implemented in the form of a head mounted device (HMD), a head up display (HUD) installed in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, a digital sign, a vehicle, a robot, etc. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, a BS and a network may be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to other wireless devices.

[0255] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. AI technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS / network. For example, vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0256] Wireless communication / connection 150a, 150b or 150c can be established between wireless devices 100a to 100f / BS200 or BS200 / BS200. Herein, wireless communication / connection can be established through various RATs (e.g., 5G NR) such as uplink / downlink communication 150a, sidelink communication 150b (or D2D communication) or inter-BS communication (e.g., relay, integrated access backhaul (IAB)). The wireless device and the BS / wireless device can send / receive radio signals to / from each other through wireless communication / connection 150a and 150b. For example, wireless communication / connection 150a and 150b can send / receive signals through various physical channels. To this end, at least a portion of various configuration information for configuring processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation and resource mapping / demapping) and resource allocation processes can be performed based on various proposals of the present disclosure.

[0257] Examples of wireless devices to which the present disclosure is applied

[0258] Fig.13 A wireless device suitable for use with the present disclosure is illustrated.

[0259] Reference Fig.13 , the first wireless device 100 and the second wireless device 200 may transmit radio signals via various RATs (e.g., LTE and NR). Herein, {the first wireless device 100 and the second wireless device 200} may correspond to Fig.11 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0260] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals in the memory 104. The memory 104 may be connected to the processor 102, and may store various information related to the operation of the processor 102. For example, the memory 104 may store software codes including commands for executing part or all of the processes controlled by the processor 102 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0261] According to one example, the first wireless device 100 or NCR may include a processor 102 connected to an RF transceiver 106 and including a memory 104. The memory 104 may include a processor capable of executing the same as the reference Figures 9 to 11 At least one procedure of operations related to the described embodiments.

[0262] Specifically, the processor 102 may control the RF transceiver 106 to perform operations including: configuring a control link for receiving control information from a BS and a forwarding link for forwarding a signal received from a UE; determining a power amplification gain for the forwarding link; and forwarding a signal received from a UE to a BS through a forwarding link based on the power amplification gain. The power amplification gain may be determined based on power control information configured for the control link. Alternatively, the memory 104 may include instructions for allowing the processor 102 to perform operations including: configuring a control link for receiving control information from a BS and a forwarding link for forwarding a signal received from a UE, determining a power amplification gain for the forwarding link, and forwarding a signal received from a UE to a BS through a forwarding link based on the power amplification gain.

[0263] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 206, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202, and may store various information related to the operation of the processor 202. For example, the memory 204 may store software codes including commands for executing part or all of the processes controlled by the processor 202 or for executing the description, functions, processes, proposals, methods, and / or operation flowcharts disclosed in this document. Herein, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0264] In the following, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by (but not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, processes, proposals, methods, and / or operational flowcharts disclosed in this document. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the description, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this document.

[0265] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to execute the descriptions, functions, processes, proposals, methods, and / or operational flow charts disclosed in this document may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The descriptions, functions, processes, proposals, methods and / or operational flow charts disclosed in this document may be implemented in the form of codes, commands and / or command sets using firmware or software.

[0266] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, instructions and / or commands. One or more memories 104 and 204 may be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer-readable storage medium and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside of one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 by various technologies such as wired or wireless connections.

[0267] One or more transceivers 106 and 206 may send the user data, control information and / or radio signal / channel mentioned in the method and / or operation flow chart of this document to one or more other devices. One or more transceivers 106 and 206 may receive the user data, control information and / or radio signal / channel mentioned in the description, function, process, proposal, method and / or operation flow chart disclosed in this document from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information or wireless signals to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the description, functions, processes, proposals, methods and / or operation flow charts disclosed in this document through one or more antennas 108 and 208. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals so as to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0268] Application examples of wireless devices to which the present disclosure is applied

[0269] Fig.14 Another example of a wireless device to which the present disclosure is applied is shown.

[0270] Reference Fig.14 , the wireless devices 100 and 200 may correspond to Fig.13The wireless devices 100 and 200 may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130 and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Fig.13 One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Fig.13 The control unit 120 is electrically connected to the communication unit 110, the memory 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 may send information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 in the memory unit 130 through a wireless / wired interface.

[0271] The additional components 140 may be configured differently depending on the type of wireless device. For example, the additional components 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be configured in the form of, but not limited to, a robot ( Fig.12 100a), vehicles ( Fig.12 100b-1 and 100b-2), XR devices ( Fig.12 100c), handheld device ( Fig.12 100d), household appliances ( Fig.12 100e), IoT devices ( Fig.12 100f), digital broadcasting terminal, holographic device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Fig.12 400), BS( Fig.12 200), network nodes, etc. The wireless device can be used in a mobile or fixed location according to the usage example / service.

[0272] exist Fig.14In the wireless devices 100 and 200, various elements, components, units / parts and / or modules in the wireless devices 100 and 200 may all be connected to each other through a wired interface, or at least a part thereof may be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be wired, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected through the communication unit 110. The various elements, components, units / parts and / or modules within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured by a collection of one or more processors. As an example, the control unit 120 may be configured by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. In another example, the memory 130 may be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM)), a flash memory, a volatile memory, a non-volatile memory and / or a combination thereof.

[0273] Here, the wireless communication technology implemented in the wireless device (XXX, YYY) of this specification may include LTE, NR and 6G in addition to narrowband Internet of Things for low-power communication. At this time, for example, NB-IoT technology may be an example of low-power wide area network (LPWAN) technology, and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above names. In addition or alternatively, the wireless communication technology implemented in the wireless device (XXX, YYY) of this specification may perform communication based on LTE-M technology. In this case, as an example, LTE-M technology may be an example of LPWAN technology, and may be referred to as various names such as eMTC (enhanced machine type communication). For example, LTE-M technology may be implemented according to at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-bandwidth limited), 5) LTE-MTC, 6) LTE machine type communication and / or 7) LTE M, and is not limited to the above names. Additionally or alternatively, in consideration of low power communication, the wireless communication technology implemented in the wireless device (XXX, YYY) of the present specification is at least one of ZigBee, Bluetooth, and a low power wide area network (LPWAN), and is not limited to the above names. As an example, ZigBee technology can generate a personal area network (PAN) related to small / low power digital communication based on various standards such as IEEE 802.15.4, and can be referred to as various names.

[0274] The above-mentioned embodiments are embodiments in which the components and features of the present disclosure are combined in a predetermined form. Unless otherwise clearly stated, each component or feature should be considered as optional. Each component or feature can be implemented in a form that is not combined with other components or features. In addition, the embodiments of the present disclosure can also be constituted by combining some components and / or features. The order of the operations described in the embodiments of the present disclosure can be changed. Some configurations or features of an embodiment can be included in other embodiments, or can be replaced with corresponding configurations or features of other embodiments. Obviously, the embodiments can be constructed by combining claims that do not have a clear reference relationship in the claims, or can be included as new claims by modifying after submission.

[0275] In this document, the embodiments of the present disclosure are described mainly based on the signal transmission / reception relationship between the terminal and the base station. Such a transmission / reception relationship is extended to the signal transmission / reception between the terminal and the repeater or between the base station and the repeater in the same / similar manner. In some cases, the specific operations described in this document as being performed by the base station can be performed by the node on it. That is, it is obvious that various operations performed in order to communicate with the terminal in a network including multiple network nodes containing the base station can be performed by the base station or by a network node other than the base station. The base station can be replaced by terms such as fixed station, node B, eNode B (eNB), access point, etc. In addition, the terminal can be replaced by terms such as user equipment (UE), mobile station (MS), mobile subscriber station (MSS).

[0276] In hardware configuration, the embodiments of the present disclosure may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, etc.

[0277] In firmware or software configuration, the method according to the embodiment of the present disclosure can be implemented in the form of modules, processes, functions, etc. The software code can be stored in a storage unit and executed by a processor. The memory is located inside or outside the processor and can send data to the processor and receive data from the processor via various known means.

[0278] As mentioned above, a detailed description of the preferred embodiments of the present disclosure has been given so that those skilled in the art can implement and perform the present disclosure. Although the preferred embodiments of the present disclosure have been referred to above, those skilled in the art will understand that various modifications and changes can be made to the present disclosure within the scope of the present disclosure.

[0279] Industrial Applicability

[0280] The above-mentioned embodiments of the present disclosure are applicable to various mobile communication systems.

Claims

1. A method for performing communication by a device in a wireless communication system, the method comprising the following steps: configuring a control link for receiving control information from a base station BS and a forwarding link for forwarding a signal received from a user equipment UE; determining a power amplification gain for the forwarding link; and forwarding the signal received from the UE to the BS through the forwarding link based on the power amplification gain, The power amplification gain is determined based on power control information configured for the control link.

2. The method according to claim 1, wherein: The power amplification gain is determined based on one power parameter among a plurality of power parameters included in the power control information.

3. The method according to claim 2, wherein: The one power parameter is preconfigured as a power parameter related to path loss among the multiple power parameters.

4. The method according to claim 1, wherein: The power amplification gain is determined based on a resource index of a downlink reference signal included in the power control information.

5. The method according to claim 1, wherein: The power amplification gain is determined based on the power control information related to a sounding reference signal (SRS) for the control link.

6. The method according to claim 2, wherein: The power amplification gain is determined based on the power control information associated with a physical random access channel PRACH for the control link.

7. The method according to claim 1, wherein: The power amplification gain is determined by applying at least one of a predetermined weight or an offset to a first transmission power for an uplink signal of the control link calculated based on the power control information.

8. The method according to claim 7, wherein: The BS indicates the predetermined weight and the offset through radio resource control RRC signaling or downlink control information DCI.

9. The method according to claim 1, further comprising the steps of: Information on the power amplification gain compared to a maximum power amplification gain is reported to the BS.

10. The method according to claim 1, wherein: The device is a network controlled repeater NCR. 11 . A computer-readable recording medium having recorded therein a program for executing the method according to claim 1 .

12. An apparatus for performing communication in a wireless communication system, the apparatus comprising: a memory configured to store instructions; as well as a processor configured to perform operations by executing the instructions, The operation of the processor includes: configuring a control link for receiving control information from a base station BS and a forwarding link for forwarding a signal received from a user equipment UE, determining a power amplification gain for the forwarding link, and forwarding the signal received from the UE to the BS through the forwarding link based on the power amplification gain, and The power amplification gain is determined based on power control information configured for the control link.

13. The device according to claim 12, wherein: The power amplification gain is determined based on one power parameter among a plurality of power parameters included in the power control information.

14. The device according to claim 13, wherein: The one power parameter is preconfigured as a power parameter related to path loss among the multiple power parameters.

15. A chipset for performing communication in a wireless communication system, the chipset comprising: at least one processor; as well as at least one memory operatively connected to the at least one processor and configured to, when executed, cause the at least one processor to perform operations, The operation includes: configuring a control link for receiving control information from a base station BS and a forwarding link for forwarding a signal received from a user equipment UE, determining a power amplification gain for the forwarding link, and forwarding the signal received from the UE to the BS through the forwarding link based on the power amplification gain, and The power amplification gain is determined based on power control information configured for the control link.

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