WO2023191446A1 - 무선 통신 시스템에서 적응적 빔포밍 수행 방법 및 장치 - Google Patents
무선 통신 시스템에서 적응적 빔포밍 수행 방법 및 장치 Download PDFInfo
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- WO2023191446A1 WO2023191446A1 PCT/KR2023/004102 KR2023004102W WO2023191446A1 WO 2023191446 A1 WO2023191446 A1 WO 2023191446A1 KR 2023004102 W KR2023004102 W KR 2023004102W WO 2023191446 A1 WO2023191446 A1 WO 2023191446A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
- H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0868—Hybrid systems, i.e. switching and combining
- H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
- H04W72/231—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
- H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
Definitions
- This disclosure relates to wireless communication systems. Specifically, the present disclosure relates to a method and apparatus for performing adaptive beamforming in a wireless communication system.
- Wireless access systems are being widely deployed to provide various types of communication services such as voice and data.
- a wireless access system is a multiple access system that can support communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
- 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, and single carrier frequency (SC-FDMA) systems. division multiple access) systems, etc.
- enhanced mobile broadband (eMBB) communication technology is being proposed compared to the existing radio access technology (RAT).
- RAT radio access technology
- a communication system that takes into account reliability and latency-sensitive services/UE (user equipment) as well as mMTC (massive machine type communications), which connects multiple devices and objects to provide a variety of services anytime and anywhere, is being proposed. .
- mMTC massive machine type communications
- the present disclosure provides a method and device for performing low-latency, high-speed transmission in a wireless communication system.
- the present disclosure provides the information necessary to perform adaptive beamforming on the link between the RU (remote unit) of the NCR and the terminal when operating a network-controlled repeater (NCR) in an NR environment.
- NCR network-controlled repeater
- a method of operating an electronic device in a wireless communication system includes information related to the number of bits in a downlink control information (DCI) field required to express beams that can be indicated from a base station (BS).
- DCI downlink control information
- BS base station
- RRC radio resource control
- UE user equipment
- At least one candidate beam set (candidate) associated with some of the plurality of available beams further comprising receiving information about a beam set, wherein the indicateable beams correspond to candidate beams included in the at least one candidate beam set, and the beam indication is transmitted through downlink transmission of at least one of the candidate beams.
- At least one of information about the second index of a downlink transmit beam (DL Tx beam), or information about the third index of an uplink receive beam (UL Rx beam) of at least one of the candidate beams It can be included.
- the at least one candidate beam set includes a DL Tx candidate beam set related to the second index and a UL Rx candidate beam set related to the third index, or, one of the at least one candidate beam set
- the beam set may include DL Tx candidate beams related to the second index and UL Tx candidate beams related to the third index.
- the at least one terminal includes a plurality of terminals, the at least one candidate beam set includes a plurality of candidate beam sets, and each of the plurality of candidate beam sets has a terminal identifier (UE) of each of the plurality of terminals.
- UE terminal identifier
- UE ID may be associated with each of the plurality of terminals.
- the at least one candidate beam set includes a plurality of candidate beam pairs, each of the plurality of beam pairs includes one DL Tx candidate beam and one UL Tx candidate beam, and the second
- the index and the third index may be related to a DL Tx candidate beam and a UL Tx candidate beam in one candidate beam pair among the plurality of candidate beam pairs.
- the first information related to the first indices of the plurality of available beams may further include information related to a beam width of each of the plurality of available beams, and information related to a plurality of multi-beam sets, respectively.
- the plurality of multi-beam sets are related to a combination of a plurality of DL Tx beams capable of simultaneous downlink transmission among the plurality of available beams, or a combination of a plurality of UL Rx beams capable of simultaneous uplink reception among the plurality of available beams. It can be.
- the second information may include information related to a mapping relationship between the at least one candidate beam set and the plurality of multi-beam sets
- the third information may include information related to a mapping relationship between the plurality of multi-beam sets based on the mapping relationship. It may include an index of one of the multi-beam sets, and the total beam width of the plurality of multi-beam sets for which a mapping relationship with the at least one candidate beam set is established may be less than or equal to the set beam width.
- a method of operating a base station (BS) in a wireless communication system includes information related to the number of bits in a downlink control information (DCI) field required to express beams that can be indicated to an electronic device. transmitting a radio resource control (RRC) signal to the electronic device, beam indication of a beam used in an access link between the electronic device and at least one user equipment (UE) among the indicateable beams; ) and transmitting a DCI including the DCI field for ), wherein the beam indication may be related to transmission or reception of a signal for the at least one terminal of the electronic device in the access link.
- RRC radio resource control
- transmitting information related to first indices of a plurality of available beams in the access link to the electronic device, at least one candidate beam set associated with some of the plurality of available beams ( It may further include transmitting information about a candidate beam set, wherein the indicateable beams may correspond to candidate beams included in the at least one candidate beam set, and the beam indication is provided by at least one of the candidate beams.
- Information about the second index of one downlink transmit beam (DL Tx beam), or about the third index of at least one uplink receive beam (UL Rx beam) among the candidate beams It may contain at least one piece of information.
- the at least one candidate beam set includes a DL Tx candidate beam set related to the second index and a UL Rx candidate beam set related to the third index, or, one of the at least one candidate beam set
- the beam set may include DL Tx candidate beams related to the second index and UL Tx candidate beams related to the third index.
- the at least one terminal includes a plurality of terminals, the at least one candidate beam set includes a plurality of candidate beam sets, and each of the plurality of candidate beam sets has a terminal identifier (UE) of each of the plurality of terminals.
- UE terminal identifier
- UE ID may be associated with each of the plurality of terminals.
- the at least one candidate beam set includes a plurality of candidate beam pairs, each of the plurality of beam pairs includes one DL Tx candidate beam and one UL Tx candidate beam, and the second
- the index and the third index may be related to a DL Tx candidate beam and a UL Tx candidate beam in one candidate beam pair among the plurality of candidate beam pairs.
- the first information related to the first indices of the plurality of available beams further includes information related to a beam width of each of the plurality of available beams and information related to a plurality of multi-beam sets, and each of the plurality The multi-beam sets may be related to a combination of a plurality of DL Tx beams capable of simultaneous downlink transmission among the plurality of available beams, or a combination of a plurality of UL Rx beams capable of simultaneous uplink reception among the plurality of available beams. .
- the second information may include information related to a mapping relationship between the at least one candidate beam set and the plurality of multi-beam sets
- the third information may include information related to a mapping relationship between the plurality of multi-beam sets based on the mapping relationship. It may include an index of one of the multi-beam sets, and the total beam width of the plurality of multi-beam sets for which a mapping relationship with the at least one candidate beam set is established may be less than or equal to the set beam width.
- an electronic device is operably connectable to a transceiver, at least one processor, and the at least one processor, and when executed by the at least one processor, instructions to perform operations ( may include at least one memory storing instructions, and the operations may include all steps of the method according to any one of claims 1 to 7.
- a base station is operably connectable to a transceiver, at least one processor, and the at least one processor, and when executed by the at least one processor, operates It may include at least one memory storing instructions for performing the operations, and the operations may include all steps of the method according to any one of claims 8 to 14.
- a control device for controlling an electronic device in a communication system may include at least one processor and at least one memory operably connected to the at least one processor, and the at least one Memories may store instructions for performing operations, based on execution by said at least one processor, said operations comprising: all steps of the method according to any one of claims 1 to 7; may include.
- a control device for controlling a base station may include at least one processor and at least one memory operably connected to the at least one processor, , the at least one memory may store instructions for performing operations based on execution by the at least one processor, the operations according to any one of claims 8 to 14. It may include all steps of the method followed.
- non-transitory computer-readable media storing one or more instructions according to an embodiment of the present disclosure
- the one or more instructions perform operations based on execution by one or more processors. And the operations may include all steps of the method according to any one of claims 1 to 7.
- non-transitory computer-readable media storing one or more instructions according to an embodiment of the present disclosure
- the one or more instructions perform operations based on execution by one or more processors. And the operations may include all steps of the method according to any one of claims 8 to 14.
- the present disclosure can provide a method and device for performing adaptive beamforming in a wireless communication system.
- cost-effective application of NCR may be possible by performing an access link beam operation in beam index units in the NCR access link.
- Figure 1 is a diagram showing an example of physical channels and general signal transmission used in a 3GPP system.
- Figure 2 is a diagram showing an example of the structure of a radio frame used in NR.
- Figure 3 is a diagram showing an example of the slot structure of an NR frame.
- Figure 4 is a diagram showing an example of the structure of a self-contained slot.
- 5 to 8 are diagrams showing an example of a transmission network architecture for 5G.
- Figure 9 is a diagram showing an example of a topology in which NCR performs transmission and reception between a base station and a terminal.
- Figure 10 is a diagram showing an example of a beamforming operation of an existing RF repeater.
- Figure 11 is a diagram illustrating an example of a beamforming operation of NCR.
- Figure 12 is a diagram showing an example of the NCR model.
- FIG. 13 is a diagram illustrating an example of a transmission beam direction operated by gNB and a transmission beam direction operated by RU in a single-hop NCR topology between gNB-NCR-UE.
- FIG. 14 is a diagram illustrating an example of a beam index setting method according to an embodiment of the present disclosure.
- FIG. 15 is a diagram illustrating an example of a beam index setting method according to another embodiment of the present disclosure.
- FIG. 16 is a diagram illustrating an example of a beam index setting method according to another embodiment of the present disclosure.
- FIG. 17 is an example illustrating an example of a mapping relationship between a single/multiple beam index and an index in a candidate beam set according to an embodiment of the present disclosure.
- FIG. 18 is a diagram illustrating an example of the association between a beam index of a backhaul link and a candidate beam set according to an embodiment of the present disclosure.
- Figure 19 is a flowchart of a signal transmission and reception method according to an embodiment of the present disclosure.
- Figure 20 is a flowchart of a signal transmission and reception method according to another embodiment of the present disclosure.
- FIG. 21 illustrates a communication system 1 applied to various embodiments of the present disclosure.
- FIG. 22 illustrates a wireless device that can be applied to various embodiments of the present disclosure.
- Figure 23 shows another example of a wireless device that can be applied to various embodiments of the present disclosure.
- Figure 24 illustrates a signal processing circuit for a transmission signal.
- Figure 25 is an example of a wireless communication device applicable to the present disclosure.
- a or B may mean “only A,” “only B,” or “both A and B.” In other words, “A or B” may be interpreted as “A and/or B” in various embodiments of the present disclosure.
- “A, B or C” can be replaced with “only A,” “only B,” “only C,” or “any of A, B, and C.” It can mean "any combination of A, B and C”.
- a slash (/) or a comma used in various embodiments of the present disclosure may mean “and/or.”
- A/B can mean “A and/or B.” Accordingly, “A/B” can mean “only A,” “only B,” or “both A and B.”
- A, B, C can mean “A, B, or C.”
- “at least one of A and B” may mean “only A,” “only B,” or “both A and B.” Additionally, in various embodiments of the present disclosure, the expression “at least one of A or B” or “at least one of A and/or B” can be interpreted the same as “at least one of A and B.”
- “at least one of A, B and C” may be referred to as “only A,” “only B,” “only C,” or “A.” , any combination of A, B and C.” Also, “at least one of A, B or C” or “at least one of A, B and/or C” means It may mean “at least one of A, B and C.”
- parentheses used in various embodiments of the present disclosure may mean “for example.” Specifically, when “control information (PDCCH)” is indicated, “PDCCH” may be proposed as an example of “control information.” In other words, “control information” in various embodiments of the present disclosure is not limited to “PDCCH,” and “PDDCH” may be proposed as an example of “control information.” Additionally, even when “control information (i.e., PDCCH)” is indicated, “PDCCH” may be proposed as an example of “control information.”
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA can be implemented with wireless technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
- TDMA can be implemented with wireless technologies such as Global System for Mobile communications (GSM)/General Packet Radio Service (GPRS)/Enhanced Data Rates for GSM Evolution (EDGE).
- OFDMA can be implemented with wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA), etc.
- UTRA is part of the Universal Mobile Telecommunications System (UMTS).
- 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) using E-UTRA
- LTE-A (Advanced)/LTE-A pro is an evolved version of 3GPP LTE.
- 3GPP NR New Radio or New Radio Access Technology
- 3GPP LTE/LTE-A/LTE-A pro may be an evolved version of 3GPP LTE/LTE-A/LTE-A pro.
- LTE refers to technology after 3GPP TS 36.xxx Release 8.
- LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A
- LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro
- 3GPP NR refers to technology after TS 38.
- 3GPP 6G may refer to technologies after TS Release 17 and/or Release 18.
- “xxx” refers to the standard document detail number.
- LTE/NR/6G can be collectively referred to as a 3GPP system.
- terms, abbreviations, etc. used in the description of the present disclosure reference may be made to matters described in standard documents published prior to the present disclosure. For example, you can refer to the following document:
- UE User Equipment
- MAC Medium Access Control
- RRC Radio Resource Control
- MAC Medium Access Control
- RRC Radio Resource Control
- IAB-node RAN node that supports wireless access to the UE and backhauls access traffic wirelessly.
- IAB-donor RAN node that provides the UE's interface to the core network and wireless backhaul functions to the IAB node.
- IAB Integrated Access and Backhaul
- CSI-RS Channel State Information Reference Signal
- DgNB Donor gNB
- CU Centralized Unit
- CU Centralized Unit
- IAB-MT IAB mobile terminal
- Figure 1 is a diagram showing an example of physical channels and general signal transmission used in a 3GPP system.
- a terminal receives information from a base station through downlink (DL), and the terminal transmits information to the base station through uplink (UL).
- the information transmitted and received between the base station and the terminal includes data and various control information, and various physical channels exist depending on the type/purpose of the information they transmit and receive.
- the terminal When the terminal is turned on or enters a new cell, it performs an initial cell search task such as synchronizing with the base station (S11). To this end, the terminal can synchronize with the base station by receiving a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) from the base station and obtain information such as a cell ID. Afterwards, the terminal can receive broadcast information within the cell by receiving a physical broadcast channel (PBCH) from the base station. Meanwhile, the terminal can check the downlink channel status by receiving a downlink reference signal (DL RS) in the initial cell search stage.
- PSS primary synchronization signal
- SSS secondary synchronization signal
- PBCH physical broadcast channel
- DL RS downlink reference signal
- the terminal After completing the initial cell search, the terminal acquires more specific system information by receiving a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH) according to the information carried in the PDCCH. You can do it (S12).
- PDCCH physical downlink control channel
- PDSCH physical downlink shared channel
- the terminal when accessing the base station for the first time or when there are no radio resources for signal transmission, the terminal can perform a random access procedure (RACH) on the base station (S13 to S16). To this end, the terminal transmits a specific sequence as a preamble through a physical random access channel (PRACH) (S13 and S15), and a response message (RAR (Random Access Response) message) can be received.
- RACH random access procedure
- PRACH physical random access channel
- RAR Random Access Response
- a contention resolution procedure can be additionally performed (S16).
- the terminal that has performed the above-described procedure will then perform PDCCH/PDSCH reception (S17) and Physical Uplink Shared Channel (PUSCH)/Physical Uplink Control Channel (Physical Uplink) as a general uplink/downlink signal transmission procedure.
- Control Channel (PUCCH) transmission (S18) can be performed.
- Control information transmitted from the terminal to the base station may be referred to as UCI (Uplink Control Information).
- UCI may include HARQ ACK/NACK (Hybrid Automatic Repeat and reQuest Acknowledgment/Negative-ACK), SR (Scheduling Request), CSI (Channel State Information), etc.
- CSI may include Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Rank Indicator (RI), etc.
- CQI Channel Quality Indicator
- PMI Precoding Matrix Indicator
- RI Rank Indicator
- UCI is generally transmitted through PUCCH, but when control information and data must be transmitted simultaneously, it can be transmitted through PUSCH.
- the terminal can aperiodically transmit UCI to the base station through PUSCH.
- new radio access technology new RAT, NR
- next-generation communications As more communication devices require greater communication capacity, there is a need for improved mobile broadband communication compared to existing radio access technology (RAT).
- Massive Machine Type Communications (MTC) which provides various services anytime, anywhere by connecting multiple devices and objects, is also one of the major issues to be considered in next-generation communications.
- communication system design considering services/terminals sensitive to reliability and latency is being discussed.
- next-generation wireless access technology considering enhanced mobile broadband communication, massive MTC, URLLC (Ultra-Reliable and Low Latency Communication), etc. is being discussed, and various embodiments of the present disclosure are used for convenience.
- the technology is called new RAT or NR.
- OFDM Orthogonal Frequency Division Multiplexing
- Figure 2 is a diagram showing an example of the structure of a radio frame used in NR.
- the new radio access technology (RAT) system uses OFDM transmission or a similar transmission method.
- the new RAT system may follow OFDM parameters that are different from those of LTE.
- the new RAT system may follow the numerology of existing LTE/LTE-A but have a larger system bandwidth (e.g., 100 MHz).
- one cell may support multiple numerologies. That is, terminals operating with different numerologies can coexist in one cell.
- uplink and downlink transmission consists of frames.
- a wireless frame is 10ms long and is defined as two 5ms half-frames (HF).
- a half-frame is defined as five 1ms subframes (Subframe, SF).
- a subframe is divided into one or more slots, and the number of slots in a subframe depends on SCS (Subcarrier Spacing).
- Each slot contains 12 or 14 OFDM(A) symbols depending on the cyclic prefix (CP). Normally when CP is used, each slot contains 14 symbols. When extended CP is used, each slot contains 12 symbols.
- the symbol may include an OFDM symbol (or CP-OFDM symbol) and an SC-FDMA symbol (or DFT-s-OFDM symbol).
- the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS, as shown in Table 1 below.
- N slot symb may be the number of symbols in a slot
- N frame,u slot may be the number of slots in a frame
- N subframe,u slot may be the number of slots in a subframe
- the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS, as shown in Table 2 below.
- NR supports multiple numerologies (or subcarrier spacing (SCS)) to support various 5G ( 5th generation) services. For example, if SCS is 15kHz, it supports wide area in traditional cellular bands, and if SCS is 30kHz/60kHz, it supports dense-urban, lower latency. And it supports a wider carrier bandwidth, and when the SCS is 60kHz or higher, it supports a bandwidth greater than 24.25GHz to overcome phase noise.
- SCS subcarrier spacing
- the NR frequency band can be defined as two types of frequency ranges (FR1, FR2).
- the numerical value of the frequency range can be changed.
- the frequency ranges of the two types (FR1, FR2) can be shown in Table 3 below.
- FR1 may mean “sub 6GHz range”
- FR2 may mean “above 6GHz range” and may be called millimeter wave (mmW). .
- mmW millimeter wave
- FR1 may include a band of 410MHz to 7125MHz as shown in Table 4 below.
- FR1 may include frequency bands above 6 GHz (or 5850, 5900, 5925 MHz, etc.).
- the frequency band above 6 GHz (or 5850, 5900, 5925 MHz, etc.) included within FR1 may include an unlicensed band.
- Unlicensed bands can be used for a variety of purposes, for example, for communications for vehicles (e.g., autonomous driving).
- OFDM(A) numerology eg, SCS or CP length, etc.
- OFDM(A) numerology may be set differently between a plurality of cells merged into one UE. Accordingly, between cells in which time resources (e.g., subframe (SF), slot, or (absolute time) of Transmission Time Interval (TTI) (referred to as Time Unit (TU))) consisting of the same number of symbols are merged. It can be set differently.
- time resources e.g., subframe (SF), slot, or (absolute time) of Transmission Time Interval (TTI) (referred to as Time Unit (TU)
- TTI Transmission Time Interval
- TU Time Unit
- Figure 3 is a diagram showing an example of the slot structure of an NR frame.
- a slot includes a plurality of symbols in the time domain. For example, in the case of normal CP, one slot includes 7 symbols, but in the case of extended CP, one slot includes 6 symbols.
- a carrier wave includes a plurality of subcarriers in the frequency domain.
- RB Resource Block
- BWP Bandwidth Part
- P consecutive RBs in the frequency domain and may correspond to one numerology (e.g., SCS or CP length, etc.).
- a carrier wave may contain up to N (e.g., 5) BWPs. Data communication is performed through an activated BWP, and only one BWP can be activated for one terminal.
- Each element in the resource grid is referred to as a Resource Element (RE), and one complex symbol can be mapped.
- RE Resource Element
- Figure 4 is a diagram showing an example of a self-contained slot.
- a frame is characterized by a self-contained structure in which a DL control channel, DL or UL data, and UL control channel can all be included in one slot.
- the first N symbols in a slot may be used to transmit a DL control channel (hereinafter, DL control area), and the last M symbols in a slot may be used to transmit a UL control channel (hereinafter, UL control area).
- N and M are each integers greater than or equal to 0.
- the resource area (hereinafter referred to as data area) between the DL control area and the UL control area may be used for DL data transmission or may be used for UL data transmission.
- data area The resource area (hereinafter referred to as data area) between the DL control area and the UL control area may be used for DL data transmission or may be used for UL data transmission.
- data area The resource area (hereinafter referred to as data area) between the DL control area and the UL control area may be used for DL data transmission or may be
- PDCCH may be transmitted in the DL control area, and PDSCH may be transmitted in the DL data area.
- PUCCH may be transmitted in the UL control area, and PUSCH may be transmitted in the UL data area.
- DCI Downlink Control Information
- UCI for example, ACK/NACK (Positive Acknowledgment/Negative Acknowledgment) information for DL data, CSI (Channel State Information) information, SR (Scheduling Request), etc.
- GP provides a time gap when the gNB and UE switch from transmission mode to reception mode or from reception mode to transmission mode. Some symbols at the point of transition from DL to UL within a subframe may be set to GP.
- 5 to 8 are diagrams showing an example of a transmission network architecture for 5G.
- the Telecommunication Standardization Sector is a slightly different transmission network architecture for 5G consisting of three logical elements: a Control Unit (CU), a Distributed Unit (D U), and a Radio Unit (RU) as shown in Figure 5.
- CU Control Unit
- D U Distributed Unit
- RU Radio Unit
- the functions of the mid layer and lower layer are divided into DU and RU.
- the RU implements the Radio Frequency (RF) function and, if possible, also implements the low-PHY function and the high-PHY function.
- RF Radio Frequency
- CUs, DUs, and RUs may be grouped in different combinations to form actual physical network elements according to network requirements. This can provide flexibility to accommodate a variety of network architectures, applications, and transport network requirements.
- the transmission network between the 5th generation core network (5GC) and the CU is referred to as a backhaul, and the backhaul network implements the 3GPP Next generation (NG) interface.
- the transport network between CU and DU is referred to as midhaul, and the midhaul network implements the 3GPP F1 interface.
- the transport network between DU and RU is referred to as fronthaul.
- backhaul, midhaul and fronthaul are referred to as xhaul.
- RIS can be used to control the propagation of electromagnetic waves by changing their electrical and magnetic properties on a surface.
- RIS is also known as intelligent reflecting surface (IRS) and large intelligent surface (LIS), and can be a programmable structure.
- IRS intelligent reflecting surface
- LIS large intelligent surface
- RIS can be used to sense the wireless environment by integrating sensing functions. By placing the RIS in the environment in which the wireless system operates, the properties of the wireless channel can be at least partially controlled.
- RIS it is possible to provide a ‘transmission effect’ of the gNB signal through which external signals are transmitted into the building, and to improve coverage of shaded areas by providing a ‘reflection effect’ in the NLoS environment.
- NCR Network-controlled repeater
- RF repeaters are a non-regenerative type of relay node that simply amplifies and transmits whatever it receives.
- the main advantages of RF repeaters are low cost, ease of deployment, and no increase in latency.
- the main drawback of RF repeaters is that they amplify signals and noise, which can contribute to increased interference (contamination) in the system.
- RF repeaters are specified in Rel-17 of RAN4 for the Frequency Range 1 (FR1) Frequency Division Duplex (FDD)/Time division Duplex (TDD) and Frequency Range 2 (FR2) bands.
- FR1 Frequency Range 1
- FDD Frequency Division Duplex
- TDD Time division Duplex
- FR2 Frequency Range 2
- Rel-17 WID includes only RF requirements.
- RAN4 Work item description (WID) (RP-210818) states that it is assumed that the RF repeater does not perform adaptive beamforming toward the UE.
- Coverage is a fundamental aspect of cellular network deployment.
- Mobile carriers rely on various types of network nodes for deployment to provide blanket coverage.
- Deployment of regular full-stack cells is an option, but may not always be possible (e.g., if there is no backhaul availability) or always economically viable.
- IAB Integrated Access and Backhaul
- RF repeater Another type of network node is an RF repeater, which simply amplifies and forwards any signals it receives.
- RF repeaters have been widely deployed in 2G, 3G, and 4G to supplement the coverage provided by regular full-stack cells.
- RAN4 specified RF and Electromagnetic Compatibility (EMC) requirements for RF repeaters for NR targeting both FR1 and FR2.
- EMC Electromagnetic Compatibility
- RF repeaters provide a cost-effective means of extending network coverage.
- RF repeaters have the limitation of simply performing amplification and transmission tasks without considering various factors that can improve performance.
- These elements include semi-static and/or dynamic downlink/uplink configuration, adaptive transmitter/receiver spatial beamforming, on-off ( ON-OFF) status, etc. may be included.
- NCR Compared to existing RF repeaters, NCR has improved functionality for receiving and processing side control information. Side control information allows network control repeaters to perform amplification and forwarding tasks in a more efficient manner. Potential benefits may include mitigation of unnecessary noise amplification, better spatial directivity transmit and receive, and simplified network integration.
- NCR is an in-band RF repeater used to extend network coverage in the FR1 and FR2 bands, and during study, FR2 deployment can be prioritized for both outdoor and Outdoor to Indoor (O2I) scenarios. Applicable only to single hop stationary NCR. NCR is transparent to the UE. NCR can simultaneously maintain a gNB (gNodeB)-repeater link and a repeater-UE link. Here, cost-effectiveness is a key consideration for NCR.
- gNB gNodeB
- RAN1 has studied and identified whether the following side control information is needed for NCR, including maximum transmit power assumptions: That is, beamforming information, timing information for aligning NCR's transmission/reception boundary b, uplink-downlink TDD configuration information, on-off information for efficient interference management and energy efficiency, and power control information for efficient interference management ( There is research and identification as to whether side control information such as (as a second priority) is needed for NCR. Additionally, RAN1 includes the study and identification of layer 1/layer 2 (L1/L2) signals (including the configuration of L1/L2) to convey side control information. There is research on identification and authentication of NCR in RAN2 and RAN3. Here, coordination with SA3 may be necessary.
- L1/L2 layer 1/layer 2
- Figure 9 is a diagram showing an example of a topology in which NCR performs transmission and reception between gNB and UE.
- a CU and/or DU exist in the gNB, and the NCR may be connected to the gNB.
- NCR may be composed of a mobile terminal (MT) and a remote unit (RU).
- the RU may be composed of only the RF layer.
- the RU can receive a signal transmitted by the gNB at the RF terminal and transmit it to the UE, and can receive a signal transmitted by the UE at the RF terminal and transmit it to the gNB.
- the RU only transfers signals between gNB and UE, but cannot generate signals/channels on its own and transmit them to gNB/UE or receive signals/channels from gNB/UE and search for them.
- the RU may consider adjusting the transmission/reception beam direction, downlink/uplink direction, on/off status, transmission power, etc. at the RF end.
- the operation of these RUs cannot be determined by the NCR on its own and can be completely controlled by the gNB.
- MT may include an RF layer and L1, L2, and/or L3 layers.
- an MT may consist of only an RF layer and an L1 layer or an L1/L2 layer, or an MT may consist of an RF layer and L1/L2/L3 layers.
- the MT can search/receive signals/channels transmitted by the gNB, and the MT can generate and transmit signals/channels transmitted to the gNB.
- the MT can receive information necessary to control the operation of the RU (i.e. side control information) from the gNB. MT does not transmit or receive with the UE.
- the NCR When compared to existing RF repeaters, the NCR is capable of the following operations.
- Figure 10 is a diagram showing an example of a beamforming operation of an existing RF repeater.
- Figure 11 is a diagram illustrating an example of a beamforming operation of NCR.
- beamforming gain can be obtained by adaptively adjusting the transmission/reception beam direction of the NCR according to the location of the UE and the channel situation of the UE.
- the TDD system cannot distinguish between downlink and uplink directions, so transmission and reception in the downlink and uplink directions are always performed simultaneously.
- a fixed TDD configuration is applied to perform switching between the downlink direction and the uplink direction in a set time pattern.
- NCR can perform downlink/uplink switching considering the TDD configuration. This enables adaptive downlink/uplink operation, reduces power waste caused by transmitting unnecessary signals, and reduces interference.
- the power of the received signal is always amplified and transmitted regardless of whether the gNB and UE transmit signals. This wastes power unnecessarily and increases interference to the surrounding area.
- NCR an on/off operation is performed, and when there is no signal to transmit to the gNB/UE, the RU operation is turned off, thereby preventing unnecessary signals from being transmitted.
- the power of the received signal is amplified and transmitted at a fixed ratio.
- the effect of interference on the surroundings is reduced by reducing the transmission power of the NCR.
- the signal can be stably transmitted to the receiver by increasing the transmission power of the NCR. .
- NCR in order to adaptively adjust beamforming, on/off, downlink/uplink direction, transmission power, etc. as described above, NCR must know the transmission/reception boundaries of the downlink/uplink. Through this, NCR can apply the operation of the RU differently for each unit time (eg, slot or symbol).
- the present invention proposes a method for determining and setting/instructing the transmission/reception beam index required to perform adaptive beamforming in the link between the RU and UE of NCR.
- NCR mentioned in the present invention can be replaced with RIS and expanded/interpreted.
- the RU plays the role of delivering the signal from the gNB to the UE in the RIS and the role of delivering the signal from the UE to the gNB, and the MT receives side control information from the gNB to control signal transmission of the RU. can perform its role.
- network can be interpreted as being replaced with gNB or CU/DU. Additionally, gNB can be interpreted as a replacement for network or CU/DU.
- Figure 12 is a diagram showing an example of the NCR model.
- NCR-RU which was expressed as RU of NCR in SID (study in description), was agreed upon by changing the term to NCR-Fwd during the RAN1#109-e standardization meeting. Therefore, in the present disclosure, RU can be interpreted as replacing the existing NCR-RU and the agreed-upon NCR-Fwd.
- the link between gNB and NCR-MT is a control link or c-link
- the link between gNB and NCR-Fwd is a backhaul link
- the link between NCR-Fwd and UE is a backhaul link. It can be defined or interpreted as an access link.
- NCR enables more intelligent RU operation control beyond the limitations of existing repeaters that only simply amplify and transmit signals.
- by introducing a new MT it is possible to control the operation of the RU by transmitting and receiving side control information between the gNB and MT.
- NCR has the feature of being able to perform adaptive beamforming in the RU-UE link using side control information.
- the cost-efficiency of NCR emerges as an important factor, it may be difficult for MT to have full control capabilities like gNB.
- the gNB's decision must be followed. More specifically, the direction of the transmission beam applied by the RU when the RU transmits the signal received from the gNB to the UE and the direction of the reception beam applied by the RU when the RU transmits the signal received from the UE to the gNB are Everything is decided by the gNB, and information about which transmission/reception beam the RU will actually apply can be provided from the gNB to the MT as side control information.
- NCR in order to transmit the signal received by the RU, it may be considered to adjust the transmission/reception beam direction, downlink/uplink direction, on/off status, transmission power, etc. at the RF end.
- the operation of these RUs cannot be determined by the NCR on its own and can be entirely controlled by the gNB.
- the MT can receive information necessary to control the operation of the RU (i.e., side control information) from the gNB.
- This side control information can be delivered through L1/L2 signaling, such as MAC-CE (MAC-control element) and DCI (downlink control indicator).
- side control information may include all or part of the following information.
- This information may include beam directions for uplink transmission to the gNB, downlink reception from the gNB, downlink transmission to the UE, and/or uplink reception from the UE.
- This information may include uplink transmission power to the gNB and/or downlink transmission power to the UE.
- the MT's side control information can be used to indicate the direction of the RU's transmission and reception beam. This disclosure proposes a method for determining which beam the side control information indicates in the RU's access link transmission and reception.
- FIG. 13 is a diagram illustrating an example of a transmission beam direction operated by gNB and a transmission beam direction operated by RU in a single-hop NCR topology between gNB-NCR-UE.
- the RU receives a downlink signal from the gNB using the transmission beam of Tx#3 of the gNB, and the UE receives a downlink signal from the RU using the transmission beam of Tx#1 of the RU.
- the beam pair of the gNB-MT and/or gNB-RU link may be fixedly set at the implementation stage, or may be determined through a beam adaptation operation between the gNB and MT.
- an example of a procedure for determining and transmitting the RU's transmission and reception beam for the RU-UE link is as follows.
- Step 1 Report information about the number of transmission and reception beams of the RU (N AC ) to the gNB.
- N AC the number of transmission and reception beams of the RU
- Second step gNB determines and instructs the beam index information that the RU will actually transmit and receive.
- the MT receives the corresponding information from the gNB as side control information.
- Step 3 Transmission and reception are performed by applying the beam direction of the RU based on the indicated information.
- Adaptive beamforming may be possible by assisting the MT in controlling the gNB with side control information, but in this case, there is no decision as to whether the transmission/reception beam index must be indicated. Therefore, this disclosure proposes a method of determining the RU transmission/reception beam index of the RU-UE link and a method of receiving indication of the actual transmission/reception beam index of the RU in the above procedure.
- multi-beam operation/transmission/reception that transmits simultaneously through a plurality of beam indices on the NCR's access link can be expected.
- multi-beam operation/transmission/reception may mean that the RU performs downlink transmission or uplink reception by using all multiple beams at once as an access link at a specific time.
- the NCR's capability information i.e., the number of beam indexes of the access link, the beam index of the access link, each beam type, and/or We propose a method of reporting the multi-beam combination of the access link and a method of instructing the RU's access link multi-beam transmission and reception based on the corresponding information.
- the access link refers to the transmission and reception link between the RU and the UE.
- the gNB must know information about the RU's transmission and reception beam index to control adaptive beamforming of the access link.
- This information about the beam index may include information about the direction of the beam for each beam index and/or the number of beams (N AC ) resourced by the RU.
- information about the transmission and reception beam direction of the RU for each beam index can be processed in the configuration of NCR or OAM (Operations, Administration, and Maintenance) configuration.
- the number of transmit/receive beam indexes (N AC ) of the RU can be assumed to be known by gnB due to implementation at the NCR installation stage. Otherwise, in order for the gNB to determine the number of beams supported by the RU, the MT may need to report the N AC value to the gNB.
- the MT reports to the gNB information about the number of beams (N AC ) supported by the RU. More specifically, information about the number of beams (N AC ) can be reported by including information about the number of beams (N AC ) in RRC signaling, MAC-CE, or UCI of PUCCH.
- Method 1 Report including N AC value through RRC signaling.
- Method 2 MT reports to gNB including N AC value in MAC-CE.
- N AC value i.e., an existing recyclable LCID or a new LCID for NCR
- the RRC parameter definition for NCR operation e.g., NumOfCandidateBeamIndex-NCR
- the N AC value is included in the payload of the MAC-CE field and reported to the gNB.
- Method 3 MT reports to gnB including the NAC value in the UCI field through PUCCH. Separate upper layer parameter settings may not be used, and from a cost-effective perspective, an MT with limited capabilities has the advantage of being able to dynamically report. For example, Method 3 can be effective in cases where the information on the number of transmission and reception beam indexes of the RU can change depending on the time, such as when the channel between the gNB and NCR is frequently reset due to instability.
- the MT can report to the gNB the number of beams (N AC ) supported by the RU independently of the number of beams for downlink transmission and the number of beams for uplink reception.
- the MT can report the NCR's capability for multi-beam transmission and reception of the access link to the gNB.
- the NCR capability may include the following information, including the number of beams (N AC ) supported by the RU for the access link.
- N AC Number of access link beam indices
- the MT needs to report information about the multi-beams available to the RU to the gNB.
- the reporting method may include information about multiple beams in the UCI field of RRC/MAC-CE signaling or PUCCH. It can be assumed that the beam index number (1) of the access link is the same as the applicable beam index number (N AC ) of the RU used in single beam transmission and reception of the proposed methods.
- the MT in order to perform multi-beam transmission and reception of the access link in the RU, the MT must appropriately select a plurality of beam indices and report them to the gNB so that there is no problem with beamforming between the multiple beam indices used simultaneously at a specific time. More specifically, when configuring multiple beams, the beam width used for each beam index may be different, so a multi-beam combination must be configured within a range that does not cause transmission problems. For this purpose, beam type information (No. 2) and configurable multi-beam information (No. 3) can be reported for each of the N AC beam indices.
- the beam type can be expressed by quantifying the degree of beam width. For example, with 1 bit of information, a narrow beam can be expressed in two levels: 0 and a wide beam can be expressed as 1. By further subdividing the beam width, the narrowest beam can be expressed as 0 and the widest beam as 3 with 2 bits of information, so that it can be expressed in stages from 0 to 3.
- the configuration information may be a multi-beam combination and/or the total number of multiple beams.
- multi-beam combination may mean the configuration of a plurality of beam indexes capable of multi-beam transmission and reception by considering beam type (i.e., beam width) information for each beam index for N AC access link beam indexes. .
- beam type i.e., beam width
- a combination of these plural beam indices can be defined as a multi-beam set.
- the total number of multiple beams (L max ) may mean the maximum number of beam indices that the NCR can configure into a multi-beam set.
- the MT can calculate the total number of multiple beams (L max ) by reflecting the weight of the beam type for each beam index.
- the beam type of each beam index that constitutes the multi-beam set may be a narrow beam.
- the MT may simply calculate the total number of multiple beams (L max ) using only the maximum number of combinable beam indices without considering the beam type for each beam index.
- the MT may configure a list of multi-beam sets that can be used by the RU, considering the multi-beam set and the total number of multi-beams (L max ).
- the MT can report multi-beam set list information to the gNB.
- the MT determines the multi-beam set in which the RU can transmit and receive multi-beams and/or the total number of multi-beams (L max ), and the information composed of the list of multi-beam sets can be referred to as access link multi-beam information (No. 3). .
- the MT can configure a list of multi-beam sets composed of a combination of a plurality of beam indices that can perform multi-beam transmission and reception.
- the multi-beam set can be configured within a range where problems do not occur when transmitting and receiving multiple beams, that is, within the limit where beamforming is physically possible.
- the set of possible multiple beams is ⁇ beam#0, beam #1 ⁇ , ⁇ beam#0, beam#2 ⁇ , ⁇ beam#0, beam#4 ⁇ , ⁇ beam#0, beam#1, beam#2 ⁇ , etc. may be a multi-beam set that can normally transmit and receive multiple beams.
- combinations such as ⁇ beam#2, beam#4 ⁇ , ⁇ beam#4, beam#5 ⁇ cannot be configured as a list of multiple beam sets because the total number of multiple beams (Lmax) of the beam width is exceeded.
- a multi-beam set list in which multi-beam transmission and reception can normally be expected from a combination of beam indices that appropriately considers the beam type can be included in the NCR's capabilities and reported.
- the number of multi-beam sets that can be configured as a list may be limited by the number of transmission and reception beam indices (N AC ), etc. . This can be configured depending on the implementation of NCR.
- the gNB can determine, set, and instruct the beam index that the RU will use for actual transmission and reception.
- the gNB can determine, set, and instruct the beam index that the RU will use for actual transmission and reception.
- the beam information proposed in this disclosure may include 'information about the RU's downlink transmission beam' and/or 'information about the RU's uplink reception beam'. Additionally, the beam index may include 'RU's downlink transmission beam index and/or 'RU's uplink reception beam index'.
- the operating beam index of the RU determined by the gNB is dynamically indicated through the MT as side control information.
- This beam index can be indicated within the number (N AC ) of transmission and reception beam indices supported by the RU (i.e., the number of beams).
- This information may be transmitted via MAC-CE or PDCCH.
- NCR for purposes such as cost efficiency, it may be considered to operate only a smaller number of beams than gNB. In this case, since the number of beams supported by the RU is relatively small, it may be less burdensome to dynamically indicate which beam the RU will use among the beams supported by the RU.
- Method 2 The gNB sets the RU's transmission/reception candidate beam set (candidate beam set) composed of a number (M) of beams smaller than or equal to the number of transmission/reception beam indices (N AC ) to the MT, and then the gNB sets the M transmission/reception candidates.
- the operating beam index of the RU among candidate beams is instructed to the MT.
- the gNB sets a transmission/reception beam set consisting of M beams and sets the set beam.
- the actual transmission/reception beam index within the set can be indicated to the MT.
- the value M ( ⁇ N AC ) can be selected and defined by the gNB as the best beams for the RU to transmit and receive through channel measurement between the gNB and the UE and set through RRC signaling.
- this method proposes that the MT first receive information about the candidate beam set used by the RU from the gNB.
- the gNB can set the MT with information about M candidate beams that the RU can use among the N AC RU beams.
- FIG. 14 is a diagram illustrating an example of a beam index setting method according to an embodiment of the present disclosure.
- M transmission/reception candidate beam sets may be associated with actual transmission/reception beam indices.
- the gNB can set the actual transmission/reception beam index associated with each candidate beam index for the M transmission/reception candidate beam sets to the MT.
- the MT receive information about the beam to be actually applied among the candidate beam sets from the gNB.
- the gNB instructs the MT through side control information about the beam index used by the RU among the M RU candidate beams.
- the MT that has received this information as side control information can determine the actual transmission/reception beam of the RU from a table in which candidate beam index and actual applied beam index information are associated. This information may be transmitted via MAC-CE or PDCCH.
- the side control information consists of two stages: transmission through MAC-CE and transmission for PDCCH.
- the gNB first sets the transmission/reception beam set to the MT with side control information through MAC-CE, and establishes the association between the transmission/reception beam set and the actual transmission/reception beam index (step 1).
- gNB can indicate the transmission/reception beam index to the MT using side control information through PDCCH (step 2).
- the following method can be additionally introduced for setting and receiving instructions for the RU's downlink transmission beam and uplink reception beam.
- Method 2-1 The candidate beam set for the RU's downlink transmission beam and the candidate beam set for the uplink transmission beam are set independently (e.g., CandidateTxBeamIndex-NCR, CandidateRxBeamIndex-NCR are set), and the downlink Instructions for the transmission beam and uplink reception beam are also performed independently.
- the candidate beam sets for the downlink transmission beam and uplink reception beam can be expressed as S DL and S UL , respectively (# of candidate beams are M DL and M UL ), respectively.
- the gNB can set the association relationship with each actual downlink transmission beam index and uplink reception beam index to the MT within the number of transmission and reception beam indices (N AC ) of the RU (i.e., M DL , M UL ⁇ N AC ), , where the gNB can select the M DL and M UL values as the best beams for the RU to transmit and receive and set them to the MT.
- This configuration can be performed, for example, with RRC signaling or MAC-CE.
- the gNB can instruct the MT about the downlink transmission beam and uplink reception beam to be actually applied by the RU through side control information.
- the gNB selects and directs the downlink transmission beam within S DL , which is a candidate beam set for the downlink transmission beam, and selects and directs the uplink reception beam within S UL , which is a candidate beam set for the uplink reception beam. You can.
- Method 2-2 gNB sets candidate beams for the RU's downlink transmission beam and uplink reception beam within one candidate beam set and sets the downlink transmission beam and uplink reception beam to be applied by the RU within the set to MT.
- one candidate beam set simultaneously includes information about the RU's downlink transmission beam and uplink reception beam.
- the gNB can set a candidate beam set for the RU's optimal downlink transmission beam and uplink reception beam through RRC parameters such as CandidateBeamIndex-NCR and set the association with the actual RU's transmission and reception beam index to the MT. there is.
- FIG. 15 is a diagram illustrating an example of a beam index setting method according to another embodiment of the present disclosure.
- the candidate beam set for the downlink transmission beam is ⁇ #1, #4, #5 ⁇ of the downlink transmission beam index of the RU
- the candidate beam set for the uplink reception beam is the reception beam of the RU. It can be associated with ⁇ #4, #7, #9 ⁇ of the beam index.
- the gNB can instruct the MT about the downlink transmission beam and uplink reception beam to be actually applied by the RU through side control information. In this case, the gNB can select and indicate the downlink transmission beam to be applied by the RU among the candidate downlink transmission beams included in the candidate beam set, and select the uplink reception beam to be applied by the RU among the candidate uplink reception beams. and can be instructed.
- Method 3 A plurality of candidate beam sets can be set and the association between the candidate beam sets and the actual transmission/reception beam index can be established. For example, if there are a plurality of UEs (e.g., C UEs) served by one NCR, the gNB sets C candidate beam sets corresponding to each UE and The association of the actual transmission/reception beam index can be determined and set to the MT. In this case, the beam indices constituting each candidate beam set may overlap each other.
- UEs e.g., C UEs
- the gNB can set a plurality of candidate beam sets to the MT.
- Each of these candidate beam sets has a set index, and information about the set index can be set together.
- each candidate beam set may be associated with one or a plurality of UEs, and information on the UE ID associated with each candidate beam set may be set together.
- information about the set index of the candidate beam set associated with each UE ID may be set.
- FIG. 16 is a diagram illustrating an example of a beam index setting method according to another embodiment of the present disclosure.
- Figure 16 shows an example of the configuration of the candidate beam set according to the UE when the candidate beam set is configured differently for each UE.
- candidate beam sets consisting of M1, M2, and M3 are configured for UE #1, #2, and #3, respectively.
- FIG. 16 shows an example in which the beam indices of RUs constituting different candidate beam sets are configured not to overlap each other. However, unlike this, the beam indices of RUs constituting different candidate beam sets may overlap each other.
- the gNB can inform the MT of the beam index to be actually applied by the RU through side control information.
- the gNB since there are multiple candidate beam sets for the RU, the gNB must also indicate the index of the candidate beam set to indicate the beam index to be applied by the RU. That is, the gNB can indicate to the MT the index and beam index information of the candidate beam set to be applied by the RU. In this case, if the candidate beam set is associated with a UE, the index of the candidate beam set may be replaced with the UE ID.
- Method 3-1 Candidate beam sets for the RU's downlink transmission beam and uplink reception beam are set independently, and instructions for the downlink transmission beam and uplink reception beam to be used for actual transmission are also independently performed. More specifically, the gNB can configure a plurality of candidate beam sets for downlink transmission beams and a plurality of candidate beam sets for uplink reception beams. After this, the gNB can instruct the MT about the downlink transmission beam and uplink reception beam that the RU will actually apply through side control information. In this case, in order to set up a downlink transmission beam, the gNB may select a downlink transmission beam to be applied within the candidate beam set along with information on the candidate beam set of the downlink transmission beam to be applied and instruct the MT.
- the gNB may select and indicate an uplink reception beam to be applied within the candidate beam set along with information on the candidate beam set of the uplink reception beam to be applied.
- information about the downlink candidate beam and the uplink candidate beam are handled separately, flexible settings and instructions that are not limited to specific beam pair configurations can be performed.
- Method 3-2 A plurality of candidate beam sets may be set, and within each candidate beam set, a plurality of candidate beams for a downlink transmission beam and a plurality of candidate beams for an uplink reception beam may be set.
- the gNB can instruct the MT about the downlink transmission beam and uplink reception beam that the RU will actually apply through side control information.
- the gNB may also indicate information about the candidate beam set to be applied to the RU. That is, the gNB can select and indicate the downlink transmission beam to be applied by the RU among the candidate downlink transmission beams included in the candidate beam set, and select and indicate the uplink reception beam to be applied by the RU among the candidate uplink reception beams. You can instruct.
- Method 3-3 Considering the case where beam instructions are performed in units of beam pairs, the gNB configures a subset in the candidate beam set in the form of a pair of ⁇ downlink transmission beam index, uplink reception beam index ⁇ Associations can be established.
- a plurality of candidate beam sets are set, and the gNB can set pair information of a plurality of candidate beam indices (downlink transmission beam index, uplink reception beam index) in each candidate beam set. That is, the gNB can associate the index of each candidate beam in the candidate beam set with a pair of ⁇ downlink transmission beam index, uplink reception beam index ⁇ . Afterwards, the gNB can instruct the MT about the downlink transmission beam and uplink reception beam to be actually applied by the RU through side control information. In this case, the gNB may indicate to the RU both information about the candidate beam set to be applied and information about the candidate beam index.
- the downlink transmission beam index and uplink reception beam index corresponding to the candidate beam index within the candidate beam set are the downlink transmission beam and uplink to be applied by the RU. It may mean a link reception beam.
- information on the candidate beam set may mean the index of the candidate beam set.
- information on the candidate beam set may mean the UE ID.
- settings for the above methods (3-1, 3-2, 3-3) are performed by the gNB and can be provided to the MT through side control information.
- the MT can indicate the beam index of the RU through the side control information provided in each proposed method.
- the above methods include mapping between a single beam index of a RU and a candidate beam set at a specific point in time for downlink transmission and/or uplink reception among the total number of transmission and reception beam (i.e., available beam) indices (N AC ) of the RU or the RU's
- N AC total number of transmission and reception beam
- NCR is implemented as a multi-antenna array
- multi-beam transmission and reception of the RU access link can be expected at a specific point in time.
- the RU can be expected to perform downlink transmission through multiple beams simultaneously or uplink reception through multiple beams simultaneously at a specific point in time.
- each index of the candidate beam set can be expanded not only to mapping with the single beam index of the RU, but also to mapping with multiple beam indexes of the RU. Thereafter, in order to transmit and receive multiple beams to the RU's access link, there must be settings/instructions from the gNB related to the multi-beam operation.
- the gNB can utilize NCR capability information containing multi-beam related information reported from the MT. And the gNB's multi-beam transmission/reception settings/instructions can be received by the MT and applied to the RU. From this perspective, the following can be proposed as to how the gNB sets up/instructs multi-beam transmission and reception.
- Method 4 The gNB sets or instructs the RU's access link multi-beam transmission and reception based on the multi-beam set list of NCR capability information.
- This NCR capability may include a multi-beam set list for the RU's access link.
- the multi-beam set list refers to a list listing a plurality of beam indices (i.e., multi-beam sets) of a RU access link capable of multi-beam transmission and reception.
- each multi-beam set can be configured based on team type information for each transmission/reception beam (i.e., available beam) index in the access link of the RU described above.
- the gNB sends a candidate beam set to the MT with the best beams for transmission and reception among the beams included in the multi-beam set configured based on the N AC RU access transmission and reception beam indices as described above through MAC-CE or RRC signaling. You can set it.
- the gNB may form a mapping relationship with a specific multi-beam set (i.e., single/multiple beam index of the RU) and a specific index of the candidate beam set.
- multi-beam set and single/multiple beam index may be interpreted to have the same meaning.
- each M index of a random candidate beam set has a mapping relationship with the single beam index of the RU
- each of the M indexes of the random candidate beam set has a mapping relationship with the single beam index of the RU.
- Mapping with not only a beam index but also multiple beam indices can be considered. Therefore, the mapping relationship between the single/multiple beam index of the RU and the index in the candidate beam set can be expressed as follows.
- FIG. 17 is an example illustrating an example of a mapping relationship between a single/multiple beam index and an index in a candidate beam set according to an embodiment of the present disclosure.
- each candidate beam set i.e., in the case of a single user (single UE)
- each candidate beam set i.e., in the case of multiple users (multiple UEs)
- each candidate beam set is an RU. It may be mapped in the same or similar form as the single/multiple beam index of.
- a mapping relationship in the form of candidate beam set index-multiple beam set index can be defined according to the judgment of the gNB. You can.
- Forms such as beam#A-set#0, beam#B-set#2, and beam#D-set#1 may be cases where the index of the candidate beam set is associated with multiple beam indices.
- a mapping relationship between the index of the candidate beam set and the single beam index may also be formed in the form of beam#C-set#3, beam#E-set#4. That is, the mapping between the index of the candidate beam set and the multi-beam set can be defined according to the gNB's judgment to enable multi-beam operation as well as a single beam of the RU access link.
- the multi-beam indexes comprised in the multi-beam set may need to have narrow beam types. More specifically, when considering the beam type of the single/multiple beam index constituting the multi-beam set, it must be equal to or smaller than the total number of multiple beams (L max ) described above. There cannot be a multi-beam set larger than the total number of multi-beams (L max ), but even if the gNB is reported due to any error, the gNB maps only to multi-beam sets that are equal to or smaller than the total number of multi-beams (L max ). Perform.
- the number of candidate beams and the configuration of the candidate beams may be set differently for the downlink transmission beam and the uplink reception beam.
- the MT receive information about the beam to be actually applied among the candidate beam sets from the gNB.
- the gNB instructs the MT through side control information about the beam index used by the RU among the M RU candidate beams.
- MT receives the corresponding information through side control information.
- the MT can determine the actual transmission/reception beam of the RU from a table in which the candidate beam index and the beam index information to be actually applied are associated.
- the transmitting and receiving beams may be single and/or multiple beams defined in the multi-beam set. This information may be transmitted via MAC-CE or PDCCH.
- the MT side controls to apply beam#A as the access link beam.
- the transmission and reception beams in the actual NCR access link mapped to beam #A are beams #1 and #3, so the two beam directions are applied as transmission and reception beams in the access link.
- the mapping relationship between candidate beam set and RU access link multi-beam is formed as beam#B- ⁇ beam#0, beam#1 ⁇ , beam#C- ⁇ beam#2 ⁇ , and beam#B is used for downlink transmission.
- the actual access link beam of NCR is sent in the two beam directions of beam #0 and beam #1. If downlink transmission is performed at once and the MT is instructed to use beam#C as the transmission/reception beam on the access link, the actual reception beam on the access link of the NCR may be beam#2, and the RU receives uplink through beam#2. Perform.
- the side control information consists of two steps: transmission through MAC-CE and transmission for PDCCH.
- the gNB first sets a candidate beam set with side control information through MAC-CE, and then establishes an association between the set candidate beam set and the actual multi-beam set. After this, gNB can indicate the transmission/reception beam index to the MT using side control information through PDCCH.
- the downlink transmission beam/uplink reception beam in the following method can be interpreted as including both single and multiple beams.
- downlink transmission beam/uplink reception beam can be interpreted as downlink transmission beams/uplink reception beams or downlink transmission multiple beam set/uplink reception multiple beam set.
- Method 4-1 Candidate beam sets for the RU's downlink transmission beam and uplink reception beam are set independently, and instructions for the downlink transmission beam and uplink reception beam to be used for actual transmission are also independently performed. More specifically, a plurality of candidate beam sets for the downlink transmission beam and a plurality of candidate beam sets for the uplink reception beam may be set, and then the gNB determines the downlink transmission beam to be actually applied by the RU through side control information. and information about the uplink reception beam can be instructed to the MT. In this case, in order to set up a downlink transmission beam, the gNB may select a downlink transmission beam to be applied within the candidate beam set along with information on the candidate beam set of the downlink transmission beam to be applied and instruct the MT.
- the gNB may select an uplink reception beam to be applied within the candidate beam set along with information on the candidate beam set of the uplink reception beam to be applied and instruct the MT.
- information about the downlink candidate beam and the uplink candidate beam are handled separately, flexible settings and instructions that are not limited to specific beam pair configurations may be possible.
- Method 4-2 A plurality of candidate beam sets may be set, and within each candidate beam set, a plurality of candidate beams for a downlink transmission beam and a plurality of candidate beams for an uplink reception beam may be set.
- the gNB can instruct the MT about the downlink transmission beam and uplink reception beam to be actually applied by the RU through side control information.
- the gNB may instruct the MT with information about the candidate beam set to be applied to the RU. That is, the gNB can select and indicate a downlink transmission beam to be applied by the RU from among the candidate downlink transmission beams included in the candidate beam set, and select an uplink reception beam to be applied by the RU from among the candidate uplink reception beams. You can instruct.
- Method 4-3 Considering the case of performing instructions in units of beam pairs, gNB can configure a subset configuration in the candidate beam set in the form of a pair of ⁇ downlink transmission beam index, uplink reception beam index ⁇ and establish association. there is. That is, the gNB may configure a plurality of candidate beam sets, and set pair information of a plurality of candidate beam indices (downlink transmission beam index, uplink reception beam index) to each candidate beam set. That is, the index of each candidate beam in the candidate beam set may be associated with a pair of ⁇ downlink transmission beam index, uplink reception beam index ⁇ . Afterwards, the gNB can instruct the MT about the downlink transmission beam and uplink reception beam to be actually applied by the RU through side control information.
- the gNB may indicate both information about the candidate beam set to be applied to the RU and information about the candidate beam index.
- the transmission beam index and uplink reception beam index corresponding to the candidate beam index within the candidate beam set are the downlink transmission beam and uplink reception to be applied by the RU. It can mean beam.
- information on the candidate beam set may mean the index of the candidate beam set.
- information on the candidate beam set may mean the UE ID.
- settings for the above methods are performed by the gNB and can be provided to the MT through side control information.
- the MT can indicate the RU's multi-beam set through the side control information provided in each proposed method.
- the RU's access link transmission and reception beam configuration may vary depending on which backhaul link beam is transmitted and received.
- NCR-MT may be the MT described above
- NCR-Fwd may be RU.
- Approach 1 There may be a set of candidate beams mapped to a specific backhaul link beam index, and when NCR-Fwd performs downlink reception or uplink transmission with the beam index of the backhaul link, NCR-Fwd uses the beam of the backhaul link Downlink transmission or uplink reception can be performed using the beam index of the actual access link mapped to the candidate beam set associated with the index.
- FIG. 18 is a diagram illustrating an example of the association between a beam index of a backhaul link and a candidate beam set according to an embodiment of the present disclosure.
- backhaul link beam #0 is associated with candidate beam set #M1 and backhaul link beam #2 is associated with candidate beam set #M2.
- the number of candidate beam sets is not limited to two, but more can be set depending on the capabilities of the gNB, and the association relationship between the candidate beam sets and the backhaul link index can also be configured in more diverse ways.
- NCR-Fwd can perform transmission and reception with access link beams mapped to candidate beam set #M2 among the beams of the access link.
- the direction of the beam is associated with the backhaul link beam#2 and the candidate beam set#M2 of the access link, and the index of candidate beam set#M2
- the direction of the beam is associated with the backhaul link beam#2 and the candidate beam set#M2 of the access link, and the index of candidate beam set#M2
- downlink transmission is indicated through #D
- NCR-MT performs downlink reception through backhaul link beam #2
- NCR-MT performs downlink reception through the associated candidate beam set #M2.
- Downlink transmission is triggered to index#D of the indicated set#M2.
- NCR-Fwd performs downlink transmission through ⁇ beam#13, beam#14 ⁇ , which is a mapped multi-beam index combination.
- RO Resource block offset
- the candidate beam set #M2 used for downlink transmission is
- NCR-Fwd actually performs uplink reception through ⁇ beam#13, beam#14 ⁇ of the access link mapped to index#D.
- NCR-MT performs uplink transmission through backhaul link beam #2 associated with index #D of candidate beam set #M2 of the access link.
- information about the backhaul link beam associated with each candidate beam set can be set from the gNB to the NCR.
- a candidate beam set associated with the corresponding beam may be set for each backhaul link beam.
- the terminal may determine the candidate beam set associated with the backhaul link beam according to the backhaul link beam applied by the NCR in a specific time resource as the candidate beam set used to indicate the access link beam in the corresponding time resource.
- NCR-Fwd is the backhaul link Downlink transmission or uplink reception can be performed based on the index of the candidate beam set of the access link associated with the beam index of .
- This method differs from the backhaul link beam-candidate beam set association in Approach 1 above in that it configures a specific index and relationship between the backhaul link beam and the candidate beam set.
- the direction of the beam that the gNB uses to broadcast the SSB is associated with the index#n of the backhaul link and the index#m of the candidate beam set of the access link, and the candidate beam index#m is the multiplex of the actual access link.
- the candidate beam index#m is the multiplex of the actual access link.
- the actual beam direction in the access link of NCR-Fwd may be ⁇ beam#1, beam#3 ⁇ mapped to index#m, and downlink transmission is performed through this.
- NCR -Fwd performs uplink reception with ⁇ beam#1, beam#3 ⁇ of the access link mapped to index#m.
- the above-mentioned beam indication is an indication procedure based on the transmission/reception beam index for the NCR-MT newly introduced in NCR, but there has not yet been a set method for receiving indication by RS ID based on the existing beam management procedure and configuration. Therefore, although the NCR cannot fully know the RS information received from the gNB, there may be a method to link the RU's transmission/reception beam information to the RS ID and perform beam direction using the corresponding RS ID.
- a method of assigning the corresponding RS ID to beams reported through the access link (i.e., beams passing through UE-NCR-gNB) among the UE's measurement reports can be considered.
- RS ID may mean SSB resource ID (SSBRI), CSI-RS resource ID (CRI), and TCI state ID for DL Tx, and SRS resource ID (SRI) for UL Rx. It can mean.
- SSBRI SSB resource ID
- CRI CSI-RS resource ID
- SRI SRS resource ID
- the beam index can be replaced with RS ID in the above-described method. That is, the gNB can indicate the beam direction to which the NCR-MT is applied to the NCR-RU by indicating the RS ID to the NCR-MT instead of the beam index.
- the beam direction of the NCR-RU corresponding to the RS ID can be resolved by 1) NCR implementation, or 2) the gNB can set the beam index of the NCR-RU for each RS ID. Specifically, the following methods can be applied:
- the NCR can receive RS ID information from the gNB through side control information received by the NCR-MT.
- the RS for the downlink transmission beam of the NCR-RU corresponding to the access link may be SSB or CSI-RS
- the RS for the uplink reception beam may be a sound reference signal (SRS).
- SRS sound reference signal
- the NCR-RU can perform beamforming through a transmission/reception beam with an RS ID indicated by the NCR-MT.
- the direction of the transmission and reception beams of the RUs corresponding to each RS ID can be assumed to be the implementation of NCR or OAM settings.
- Beam index can be set for each RS ID, and RS ID can be indicated with side control information.
- RS ID can be indicated with side control information.
- SSB beam indices of gNB there are 4 SSB beam indices of gNB (SSB#0 ⁇ SSB#3), 4 SSB beam indices of RU (SSBRU#0 ⁇ SSBRU#3), and the beam in the fronthaul link.
- the beam set through management is SSB#3
- the beam of the Agates link passing through NCR can be assigned to four indexes: SSB#3-SSBRU#0 to SSB#3-SSBRU#3.
- the gNB can set the associated RS ID for each of the four beam indices of the access link and provide the setting information to the NCR-MT through side control information.
- the NCR can receive information on the RS ID from the gNB as side control information received by the NCR-MT in order to determine the transmission/reception beam direction of the RU.
- the transmission/reception beam index of the RU corresponding to each RS ID can be set.
- the gNB can set the transmission/reception beam index information of the RU corresponding to each RS ID to the NCR-MT through signaling such as RRC or MAC-CE.
- Method 3 A beam index for each RS ID can be set for a plurality of candidate beam sets, and the set index and RS ID can be indicated through side control information.
- the gNB can set an RS ID associated with the NCR-RU transmission/reception beam index for each set and an index indicating which set it indicates.
- gNB can provide configuration information to NCR-MT through side control information.
- each of these candidate beam sets can have a set index, and information about the set index can be set together.
- each candidate beam set may be associated with one or more UEs, and information on the UE ID associated with each candidate beam set may be set together.
- information about the set index of the candidate beam set associated with each UE ID may be set.
- the NCR-MT can receive the transmission/reception beam index of the NCR-RU corresponding to each RS ID for each candidate beam set from the gNB.
- the gNB can set the transmission/reception beam index information of the NCR-RU corresponding to each RS ID for each candidate beam set through signaling such as RRC or MAC-CE.
- the NCR can receive information on the candidate beam set applied from the gNB and information on the RS ID through side control information received by the NCR-MT.
- the information of the candidate beam set may mean the index of the candidate beam set, or if the candidate beam set is associated with the UE, the information of the candidate beam set may mean the UE ID.
- NCR receives the downlink transmission beam index (or RS ID) and/or uplink reception beam index (or, uplink reception beam index (or, RS ID) can be set.
- the actual beam direction of the NCR-RU corresponding to a specific beam index (or RS ID) can be determined as follows.
- Method 1 This is an implementation issue of NCR-RU and is decided by NCR-RU.
- Method 2 The beam direction is set for each beam index (or RS ID) through OAM settings, etc.
- the NCR-RU must perform transmission and reception by applying the same transmission/reception beam direction in time resources set to apply the same transmission/reception beam index (or RS ID).
- Figure 19 is a flowchart of a signal transmission and reception method according to an embodiment of the present disclosure.
- the electronic device in FIG. 19 may be the NCR described above, but is not limited thereto.
- the electronic device may receive an RRC signal including information related to the number of bits in the DCI field required to express indicateable beams from the base station (S1910).
- the electronic device Before receiving the RRC signal, the electronic device transmits to the base station information related to first indices of a plurality of available beams in the access link, and at least one candidate beam set related to some of the plurality of available beams You can receive more information about.
- the indicateable beams may correspond to candidate beams included in the at least one candidate beam set.
- the beam indication includes information about the second index of at least one downlink transmit beam (DL Tx beam) among the candidate beams, or information about the second index of at least one uplink receive beam (UL) among the candidate beams. It may include at least one piece of information about the third index of the Rx beam).
- DL Tx beam downlink transmit beam
- UL uplink receive beam
- the at least one candidate beam set includes a DL Tx candidate beam set related to the second index and a UL Rx candidate beam set related to the third index, or, one of the at least one candidate beam set
- the beam set may include DL Tx candidate beams related to the second index and UL Tx candidate beams related to the third index.
- the at least one candidate beam set includes a plurality of candidate beam pairs, each of the plurality of beam pairs includes one DL Tx candidate beam and one UL Tx candidate beam, and the second index and the third The index may be related to a DL Tx candidate beam and a UL Tx candidate beam within one candidate beam pair among the plurality of candidate beam pairs.
- the first information related to the first indices of the plurality of available beams may further include information related to the beam width of each of the plurality of available beams and information related to a plurality of multi-beam sets, each The plurality of multi-beam sets may be related to a combination of a plurality of DL Tx beams capable of simultaneous downlink transmission among the plurality of available beams, or a combination of a plurality of UL Rx beams capable of simultaneous uplink reception among the plurality of available beams. You can.
- the second information includes information related to a mapping relationship between the at least one candidate beam set and the plurality of multi-beam sets
- the third information includes one of the plurality of multi-beam sets based on the mapping relationship.
- the total beam width of the plurality of multi-beam sets that includes the index of the multi-beam set and for which a mapping relationship is established with the at least one candidate beam set may be less than or equal to the set beam width.
- the electronic device may receive a DCI including the DCI field for beam indication of a beam used in an access link between the electronic device and at least one terminal among the indicateable beams from the base station (S1920).
- the at least one terminal may include a plurality of terminals.
- each of the plurality of candidate beam sets includes a terminal identifier of each of the plurality of terminals ( It can be associated with each of the plurality of terminals based on UE identifier (UE ID).
- UE ID UE identifier
- the electronic device may transmit or receive a signal with the at least one terminal based on the beam instruction (S1930).
- Figure 20 is a flowchart of a signal transmission and reception method according to another embodiment of the present disclosure.
- the electronic device may be the NCR described above, but is not limited thereto.
- the base station may transmit an RRC signal containing information related to the number of bits in the DCI field required to express indicateable beams to the electronic device (S2010).
- the base station Before transmitting the RRC signal, the base station may transmit information related to first indices of a plurality of available beams in the access link to the electronic device, and at least one candidate beam related to some of the plurality of available beams Information about a candidate beam set can be transmitted.
- the indicateable beams correspond to candidate beams included in the at least one candidate beam set, and the beam indication is given in the second index of at least one downlink transmit beam (DL Tx beam) among the candidate beams. It may include at least one of information about or information about the third index of at least one uplink receive beam (UL Rx beam) among the candidate beams.
- DL Tx beam downlink transmit beam
- UL Rx beam uplink receive beam
- the at least one candidate beam set includes a DL Tx candidate beam set related to the second index and a UL Rx candidate beam set related to the third index, or, one of the at least one candidate beam set
- the beam set may include DL Tx candidate beams related to the second index and UL Tx candidate beams related to the third index.
- the at least one candidate beam set includes a plurality of candidate beam pairs, each of the plurality of beam pairs includes one DL Tx candidate beam and one UL Tx candidate beam, and the second
- the index and the third index may be related to a DL Tx candidate beam and a UL Tx candidate beam in one candidate beam pair among the plurality of candidate beam pairs.
- the first information related to the first indices of the plurality of available beams may further include information related to the beam width of each of the plurality of available beams and information related to a plurality of multi-beam sets, each The plurality of multi-beam sets may be related to a combination of a plurality of DL Tx beams capable of simultaneous downlink transmission among the plurality of available beams, or a combination of a plurality of UL Rx beams capable of simultaneous uplink reception among the plurality of available beams. You can.
- the second information includes information related to a mapping relationship between the at least one candidate beam set and the plurality of multi-beam sets
- the third information includes one of the plurality of multi-beam sets based on the mapping relationship.
- the total beam width of the plurality of multi-beam sets that includes the index of the multi-beam set and for which a mapping relationship is established with the at least one candidate beam set may be less than or equal to the set beam width.
- the base station may transmit a DCI including the DCI field for beam indication of a beam used in an access link between the electronic device and at least one terminal among the indicateable beams to the electronic device (S2020).
- the beam indication may be related to transmission or reception of a signal to the at least one terminal of the electronic device in the access link.
- the at least one terminal may include a plurality of terminals.
- the at least one candidate beam set includes a plurality of candidate beam sets, and when the at least one terminal is plural, each of the plurality of candidate beam sets includes a terminal identifier (UE) of each of the plurality of terminals.
- UE terminal identifier
- UE ID may be associated with each of the plurality of terminals.
- FIG. 21 illustrates a communication system 1 applied to various embodiments of the present disclosure.
- the communication system 1 applied to various embodiments of the present disclosure includes a wireless device, a base station, and a network.
- a wireless device refers to a device that performs communication using wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution), 6G wireless communication), and includes communication/wireless/5G device/6G device. It may be referred to as .
- wireless devices include robots (100a), vehicles (100b-1, 100b-2), XR (eXtended Reality) devices (100c), hand-held devices (100d), and home appliances (100e). ), IoT (Internet of Thing) device (100f), and AI device/server (400).
- vehicles may include vehicles equipped with wireless communication functions, autonomous vehicles, vehicles capable of inter-vehicle communication, etc.
- the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone).
- UAV Unmanned Aerial Vehicle
- XR devices include AR (Augmented Reality)/VR (Virtual Reality)/MR (Mixed Reality) devices, HMD (Head-Mounted Device), HUD (Head-Up Display) installed in vehicles, televisions, smartphones, It can be implemented in the form of computers, wearable devices, home appliances, digital signage, vehicles, robots, etc.
- Portable devices may include smartphones, smart pads, wearable devices (e.g., smartwatches, smart glasses), and computers (e.g., laptops, etc.).
- Home appliances may include TVs, refrigerators, washing machines, etc.
- IoT devices may include sensors, smart meters, etc.
- a base station and network may also be implemented as wireless devices, and a specific wireless device 200a may operate as a base station/network node for other wireless devices.
- Wireless devices 100a to 100f may be connected to the network 300 through the base station 200.
- AI Artificial Intelligence
- the network 300 may be configured using a 3G network, 4G (eg, LTE) network, 5G (eg, NR) network, or 6G network.
- Wireless devices 100a to 100f may communicate with each other through the base station 200/network 300, but may also communicate directly (e.g. sidelink communication) without going through the base station/network.
- vehicles 100b-1 and 100b-2 may communicate directly (e.g.
- V2V Vehicle to Vehicle
- V2X Vehicle to everything
- an IoT device eg, sensor
- another IoT device eg, sensor
- another wireless device 100a to 100f
- Wireless communication/connection may be established between the wireless devices (100a to 100f)/base station (200) and the base station (200)/base station (200).
- wireless communication/connection includes various wireless connections such as uplink/downlink communication (150a), sidelink communication (150b) (or D2D communication), and inter-base station communication (150c) (e.g. relay, IAB (Integrated Access Backhaul)).
- uplink/downlink communication 150a
- sidelink communication 150b
- inter-base station communication 150c
- This can be achieved through technology (e.g., 5G NR).
- a wireless device and a base station/wireless device, and a base station and a base station can transmit/receive wireless signals to each other.
- wireless communication/connection (150a, 150b, 150c) can transmit/receive signals through various physical channels.
- various signal processing processes e.g., channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.
- resource allocation processes etc.
- FIG. 22 illustrates a wireless device that can be applied to various embodiments of the present disclosure.
- the first wireless device 100 and the second wireless device 200 can transmit and receive wireless signals through various wireless access technologies (eg, LTE, NR).
- ⁇ first wireless device 100, second wireless device 200 ⁇ refers to ⁇ wireless device 100x, base station 200 ⁇ and/or ⁇ wireless device 100x, wireless device 100x) in FIG. 21. ⁇ can be responded to.
- the first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers 106 and/or one or more antennas 108.
- Processor 102 controls memory 104 and/or transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein.
- the processor 102 may process information in the memory 104 to generate first information/signal and then transmit a wireless signal including the first information/signal through the transceiver 106.
- the processor 102 may receive a wireless signal including the second information/signal through the transceiver 106 and then store information obtained from signal processing of the second information/signal 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, memory 104 may perform some or all of the processes controlled by processor 102 or instructions for performing the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein. Software code containing them can be stored.
- the processor 102 and memory 104 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR).
- Transceiver 106 may be coupled to processor 102 and may transmit and/or receive wireless signals via one or more antennas 108. Transceiver 106 may include a transmitter and/or receiver. The transceiver 106 can be used interchangeably with an RF (Radio Frequency) unit.
- a wireless device may mean a communication modem/circuit/chip.
- the second wireless device 200 includes one or more processors 202, one or more memories 204, and may further include one or more transceivers 206 and/or one or more antennas 208.
- Processor 202 controls memory 204 and/or transceiver 206 and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein.
- the processor 202 may process the information in the memory 204 to generate third information/signal and then transmit a wireless signal including the third information/signal through the transceiver 206.
- the processor 202 may receive a wireless signal including the fourth information/signal through the transceiver 206 and then store information obtained from signal processing of the fourth information/signal in the memory 204.
- the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202. For example, memory 204 may perform some or all of the processes controlled by processor 202 or instructions for performing the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein. Software code containing them can be stored.
- the processor 202 and memory 204 may be part of a communication modem/circuit/chip designed to implement wireless communication technology (eg, LTE, NR).
- Transceiver 206 may be coupled to processor 202 and may transmit and/or receive wireless signals via one or more antennas 208. Transceiver 206 may include a transmitter and/or receiver. Transceiver 206 may be used interchangeably with an RF unit.
- a wireless device may mean a communication modem/circuit/chip.
- one or more protocol layers may be implemented by one or more processors 102, 202.
- one or more processors 102, 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
- One or more processors 102, 202 may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, suggestions, methods and/or operational flow charts disclosed herein. can be created.
- PDUs Protocol Data Units
- SDUs Service Data Units
- One or more processors 102, 202 may generate messages, control information, data or information according to the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein.
- One or more processors 102, 202 generate signals (e.g., baseband signals) containing PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and/or methods disclosed herein. , can be provided to one or more transceivers (106, 206).
- One or more processors 102, 202 may receive signals (e.g., baseband signals) from one or more transceivers 106, 206, and the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein.
- PDU, SDU, message, control information, data or information can be obtained.
- One or more processors 102, 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer.
- One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof.
- ASICs Application Specific Integrated Circuits
- DSPs Digital Signal Processors
- DSPDs Digital Signal Processing Devices
- PLDs Programmable Logic Devices
- FPGAs Field Programmable Gate Arrays
- the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc.
- Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed in this document may be included in one or more processors (102, 202) or stored in one or more memories (104, 204). It may be driven by the above processors 102 and 202.
- the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in this document may be implemented using firmware or software in the form of codes, instructions and/or sets of instructions.
- One or more memories 104, 204 may be connected to one or more processors 102, 202 and may store various types of data, signals, messages, information, programs, codes, instructions, and/or instructions.
- One or more memories 104, 204 may consist of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof.
- One or more memories 104, 204 may be located internal to and/or external to one or more processors 102, 202. Additionally, one or more memories 104, 204 may be connected to one or more processors 102, 202 through various technologies, such as wired or wireless connections.
- One or more transceivers 106, 206 may transmit user data, control information, wireless signals/channels, etc. mentioned in the methods and/or operation flowcharts of this document to one or more other devices.
- One or more transceivers 106, 206 may receive user data, control information, wireless signals/channels, etc. referred to in the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed herein, etc. from one or more other devices. there is.
- one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and may transmit and receive wireless signals.
- one or more processors 102, 202 may control one or more transceivers 106, 206 to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors 102, 202 may control one or more transceivers 106, 206 to receive user data, control information, or wireless signals from one or more other devices. In addition, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may be connected to the description and functions disclosed in this document through one or more antennas (108, 208). , may be set to transmit and receive user data, control information, wireless signals/channels, etc.
- one or more antennas may be multiple physical antennas or multiple logical antennas (eg, antenna ports).
- One or more transceivers (106, 206) process the received user data, control information, wireless signals/channels, etc. using one or more processors (102, 202), and convert the received wireless signals/channels, etc. from the RF band signal. It can be converted to a baseband signal.
- One or more transceivers (106, 206) may convert user data, control information, wireless signals/channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals.
- one or more transceivers 106, 206 may comprise (analog) oscillators and/or filters.
- Figure 23 shows another example of a wireless device that can be applied to various embodiments of the present disclosure.
- the wireless device may include at least one processor (102, 202), at least one memory (104, 204), at least one transceiver (106, 206), and one or more antennas (108, 208). there is.
- FIG. 22 As a difference between the example of the wireless device previously described in FIG. 22 and the example of the wireless device in FIG. 23, in FIG. 22 the processors 102 and 202 and the memories 104 and 204 are separated, but in the example of FIG. 23, the processor The point is that memories (104, 204) are included in (102, 202).
- processors 102 and 202 memories 104 and 204, transceivers 106 and 206, and one or more antennas 108 and 208 are as described above, so to avoid unnecessary repetition of description, Repeated descriptions should be omitted.
- Figure 24 illustrates a signal processing circuit for a transmission signal.
- the signal processing circuit 1000 may include a scrambler 1010, a modulator 1020, a layer mapper 1030, a precoder 1040, a resource mapper 1050, and a signal generator 1060.
- the operations/functions of Figure 24 may be performed in the processors 102, 202 and/or transceivers 106, 206 of Figure 22.
- the hardware elements of Figure 24 may be implemented in the processors 102, 202 and/or transceivers 106, 206 of Figure 22.
- blocks 1010 to 1060 may be implemented in processors 102 and 202 of FIG. 22.
- blocks 1010 to 1050 may be implemented in the processors 102 and 202 of FIG. 22, and block 1060 may be implemented in the transceivers 106 and 206 of FIG. 22.
- the codeword can be converted into a wireless signal through the signal processing circuit 1000 of FIG. 24.
- a codeword is an encoded bit sequence of an information block.
- the information block may include a transport block (eg, UL-SCH transport block, DL-SCH transport block).
- Wireless signals may be transmitted through various physical channels (eg, PUSCH, PDSCH).
- the codeword may be converted into a scrambled bit sequence by the scrambler 1010.
- the scramble sequence used for scrambling is generated based on an initialization value, and the initialization value may include ID information of the wireless device.
- the scrambled bit sequence may be modulated into a modulation symbol sequence by the modulator 1020.
- Modulation methods may include pi/2-BPSK (pi/2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), m-QAM (m-Quadrature Amplitude Modulation), etc.
- the complex modulation symbol sequence may be mapped to one or more transport layers by the layer mapper 1030.
- the modulation symbols of each transport layer may be mapped to the corresponding antenna port(s) by the precoder 1040 (precoding).
- the output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 with the precoding matrix W of N*M.
- N is the number of antenna ports and M is the number of transport layers.
- the precoder 1040 may perform precoding after performing transform precoding (eg, DFT transformation) on complex modulation symbols. Additionally, the precoder 1040 may perform precoding without performing transform precoding.
- the resource mapper 1050 can map the modulation symbols of each antenna port to time-frequency resources.
- a time-frequency resource may include a plurality of symbols (eg, CP-OFDMA symbol, DFT-s-OFDMA symbol) in the time domain and a plurality of subcarriers in the frequency domain.
- the signal generator 1060 generates a wireless signal from the mapped modulation symbols, and the generated wireless signal can be transmitted to another device through each antenna.
- the signal generator 1060 may include an Inverse Fast Fourier Transform (IFFT) module, a Cyclic Prefix (CP) inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc. .
- IFFT Inverse Fast Fourier Transform
- CP Cyclic Prefix
- DAC Digital-to-Analog Converter
- the signal processing process for the received signal in the wireless device may be configured as the reverse of the signal processing process (1010 to 1060) of FIG. 24.
- a wireless device eg, 100 and 200 in FIG. 22
- the received wireless signal can be converted into a baseband signal through a signal restorer.
- the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Thereafter, the baseband signal can be restored to a codeword through a resource de-mapper process, postcoding process, demodulation process, and de-scramble process.
- ADC analog-to-digital converter
- FFT Fast Fourier Transform
- a signal processing circuit for a received signal may include a signal restorer, resource de-mapper, postcoder, demodulator, de-scrambler, and decoder.
- Figure 25 is an example of a wireless communication device applicable to the present disclosure.
- a wireless communication device for example, a terminal, includes a processor 2310 such as a digital signal processor (DSP) or a microprocessor, a transceiver 2335, a power management module 2305, and an antenna ( 2340), battery 2355, display 2315, keypad 2320, GPS (Global Positioning System) chip 2360, sensor 2365, memory 2330, SIM (Subscriber Identification Module) card (2325), It may include at least one of a speaker 2345 and a microphone 2350. There may be a plurality of antennas and processors.
- DSP digital signal processor
- Processor 2310 may implement the functions, procedures, and methods described in this specification.
- the processor 2310 of FIG. 25 may be the processors 102 and 202 of FIG. 23.
- the memory 2330 is connected to the processor 2310 and stores information related to the operation of the processor. Memory may be located internally or externally to the processor and may be connected to the processor through various technologies, such as wired or wireless connections.
- the memory 2330 of FIG. 25 may be the memories 104 and 24 of FIG. 23.
- the user can input various types of information, such as a phone number, using various techniques, such as pressing a button on the keypad 2320 or activating sound using the microphone 2350.
- the processor 2310 may receive and process user information and perform appropriate functions, such as calling the entered phone number.
- data may be retrieved from SIM card 2325 or memory 2330 to perform the appropriate function.
- processor 2310 may display various types of information and data on display 2315 for the user's convenience.
- the transceiver 2335 is connected to the processor 2310 and transmits and/or receives wireless signals such as RF (Radio Frequency) signals.
- the processor may control the transceiver to initiate communication or transmit wireless signals containing various types of information or data, such as voice communication data.
- a transceiver includes a transmitter and receiver for transmitting and receiving wireless signals.
- Antenna 2340 can facilitate transmission and reception of wireless signals.
- the transceiver may receive a wireless signal and forward and convert the signal to a baseband frequency for processing by a processor.
- the processed signal may be processed by various techniques, such as being converted into audible or readable information to be output through speaker 2345.
- the transceiver of FIG. 25 may be the transceiver 106, 206 of FIG. 23.
- a camera may be connected to the processor 2310.
- USB Universal Serial Bus
- Figure 25 is only one implementation example for a terminal, and the implementation example is not limited thereto.
- the terminal does not necessarily include all the elements of Figure 25. That is, some components, such as the keypad 2320, GPS (Global Positioning System) chip 2360, sensor 2365, SIM card 2325, etc., may not be essential elements and in this case, are not included in the terminal. Maybe not.
- GPS Global Positioning System
- Base station can be replaced by terms such as fixed station, Node B, eNode B (eNB), and access point.
- Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
- an embodiment of the present invention includes one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), and FPGAs ( It can be implemented by field programmable gate arrays, processors, controllers, microcontrollers, microprocessors, etc.
- ASICs application specific integrated circuits
- DSPs digital signal processors
- DSPDs digital signal processing devices
- PLDs programmable logic devices
- FPGAs field programmable gate arrays, processors, controllers, microcontrollers, microprocessors, etc.
- an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
- Software code can be stored in a memory unit and run by a processor.
- the memory unit is located inside or outside the processor and can exchange data with the processor through various known means.
- Base station can be replaced by terms such as fixed station, Node B, eNode B (eNB), and access point, and the names of base stations are remote radio head (RRH), eNB, and transmission point (TP). ), RP (reception point), relay, etc. can be used as a comprehensive term.
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Abstract
Description
| SCS (15*2u) | Nslot symb | Nframe,u slot | Nsubframe,u slot |
| 15KHz (u=0) | 14 | 10 | 1 |
| 30KHz (u=1) | 14 | 20 | 2 |
| 60KHz (u=2) | 14 | 40 | 4 |
| 120KHz (u=3) | 14 | 80 | 8 |
| 240KHz (u=4) | 14 | 160 | 16 |
| SCS (15*2u) | Nslot symb | Nframe,u slot | Nsubframe,u slot |
| 60KHz (u=2) | 12 | 40 | 4 |
| Frequency Range designation | Corresponding frequency range | Subcarrier Spacing |
| FR1 | 450MHz - 6000MHz | 15, 30, 60kHz |
| FR2 | 24250MHz - 52600MHz | 60, 120, 240kHz |
| Frequency Range designation | Corresponding frequency range | Subcarrier Spacing |
| FR1 | 410MHz - 7125MHz | 15, 30, 60kHz |
| FR2 | 24250MHz - 52600MHz | 60, 120, 240kHz |
Claims (20)
- 무선 통신 시스템에서 전자 장치의 동작 방법에 있어서,기지국(base station, BS)으로부터 지시 가능한 빔들을 표현하기 위해 필요한 DCI(downlink control information) 필드 내 비트 개수와 관련되는 정보를 포함하는 RRC(radio resource control) 신호를 수신하는 단계;상기 기지국으로부터 상기 지시 가능한 빔들 중 상기 전자 장치와 적어도 하나의 단말(user equipment, UE) 사이의 액세스 링크에서 사용되는 빔의 빔 지시(beam indication)에 대한 상기 DCI 필드를 포함하는 DCI를 수신하는 단계; 및상기 빔 지시에 기반하여 상기 적어도 하나의 단말과 신호를 전송 또는 수신하는 단계를 포함하는, 방법.
- 제1 항에 있어서,상기 RRC 신호를 수신하기 전에, 상기 기지국에게 상기 액세스 링크 내 복수의 가용 빔들의 제1 인덱스들과 관련된 정보를 전송하는 단계, 상기 복수의 가용 빔들 중 일부와 관련되는 적어도 하나의 후보 빔 셋(candidate beam set)에 관한 정보를 수신하는 단계를 더 포함하고,상기 지시 가능한 빔들은 상기 적어도 하나의 후보 빔 셋에 포함된 후보 빔들에 해당하고,상기 빔 지시는 상기 후보 빔들 중 적어도 하나의 하향링크 송신 빔(downlink transmit beam, DL Tx 빔)의 제2 인덱스에 관한 정보, 또는 상기 후보 빔들 중 적어도 하나의 상향링크 수신 빔(uplink receive beam, UL Rx 빔)의 제3 인덱스에 관한 정보 중 적어도 하나를 포함하는, 방법.
- 제2 항에 있어서,상기 적어도 하나의 후보 빔 셋은 상기 제2 인덱스와 관련되는 DL Tx 후보 빔 셋과 상기 제3 인덱스와 관련되는 UL Rx 후보 빔 셋을 포함하거나, 또는,상기 적어도 하나의 후보 빔 셋 중 하나의 후보 빔 셋은 상기 제2 인덱스와 관련되는 DL Tx 후보 빔들과 상기 제3 인덱스와 관련되는 UL Tx 후보 빔들을 포함하는, 방법.
- 제2 항에 있어서,상기 적어도 하나의 단말은 복수의 단말들을 포함하고,상기 적어도 하나의 후보 빔 셋은 복수의 후보 빔 셋들을 포함하고,각각의 상기 복수의 후보 빔 셋들은 각각의 상기 복수의 단말들의 단말 식별자(UE identifier, UE ID)에 기반하여 각각의 상기 복수의 단말들과 연관되는, 방법.
- 제2 항에 있어서,상기 적어도 하나의 후보 빔 셋은 복수의 후보 빔 쌍(candidate beam pair)들을 포함하고,각각의 상기 복수의 빔 쌍들은 하나의 DL Tx 후보 빔과 하나의 UL Tx 후보 빔을 포함하고,상기 제2 인덱스 및 상기 제3 인덱스는 상기 복수의 후보 빔 쌍들 중 하나의 후보 빔 쌍 내 DL Tx 후보 빔 및 UL Tx 후보 빔과 관련되는, 방법.
- 제2 항에 있어서,상기 복수의 가용 빔들의 상기 제1 인덱스들과 관련된 제1 정보는,각각의 상기 복수의 가용 빔들의 빔 폭과 관련된 정보, 및복수의 멀티-빔 셋들과 관련된 정보를 더 포함하고,각각의 상기 복수의 멀티 빔 셋들은 상기 복수의 가용 빔들 중 동시에 하향링크 전송이 가능한 복수의 DL Tx 빔들의 조합, 또는 상기 복수의 가용 빔들 중 동시에 상향링크 수신이 가능한 복수의 UL Rx 빔들의 조합과 관련되는, 방법.
- 제6 항에 있어서,상기 제2 정보는 상기 적어도 하나의 후보 빔 셋과 상기 복수의 멀티-빔 셋들 간 매핑 관계와 관련된 정보를 포함하고,상기 제3 정보는 상기 매핑 관계에 기반하여 상기 복수의 멀티-빔 셋들 중 하나의 멀티-빔 셋의 인덱스를 포함하고,상기 적어도 하나의 후보 빔 셋과 매핑 관계가 설정되는 상기 복수의 멀티-빔 셋들은 총 빔 폭이 설정된 빔 폭보다 작거나 같은, 방법.
- 무선 통신 시스템에서 기지국(base station, BS)의 동작 방법에 있어서,전자 장치에게 지시 가능한 빔들을 표현하기 위해 필요한 DCI(downlink control information) 필드 내 비트 개수와 관련되는 정보를 포함하는 RRC(radio resource control) 신호를 전송하는 단계;상기 전자 장치에게 상기 지시 가능한 빔들 중 상기 전자 장치와 적어도 하나의 단말(user equipment, UE) 사이의 액세스 링크에서 사용되는 빔의 빔 지시(beam indication)에 대한 상기 DCI 필드를 포함하는 DCI를 전송하는 단계를 포함하고,상기 빔 지시는 상기 액세스 링크에서 상기 전자 장치의 상기 적어도 하나의 단말에 대한 신호의 전송 또는 수신과 관련되는, 방법.
- 제8 항에 있어서,상기 RRC 신호를 전송하기 전에, 상기 전자 장치에게 상기 액세스 링크 내 복수의 가용 빔들의 제1 인덱스들과 관련된 정보를 전송하는 단계, 상기 복수의 가용 빔들 중 일부와 관련되는 적어도 하나의 후보 빔 셋(candidate beam set)에 관한 정보를 전송하는 단계를 더 포함하고,상기 지시 가능한 빔들은 상기 적어도 하나의 후보 빔 셋에 포함된 후보 빔들에 해당하고,상기 빔 지시는 상기 후보 빔들 중 적어도 하나의 하향링크 송신 빔(downlink transmit beam, DL Tx 빔)의 제2 인덱스에 관한 정보, 또는 상기 후보 빔들 중 적어도 하나의 상향링크 수신 빔(uplink receive beam, UL Rx 빔)의 제3 인덱스에 관한 정보 중 적어도 하나를 포함하는, 방법.
- 제9 항에 있어서,상기 적어도 하나의 후보 빔 셋은 상기 제2 인덱스와 관련되는 DL Tx 후보 빔 셋과 상기 제3 인덱스와 관련되는 UL Rx 후보 빔 셋을 포함하거나, 또는,상기 적어도 하나의 후보 빔 셋 중 하나의 후보 빔 셋은 상기 제2 인덱스와 관련되는 DL Tx 후보 빔들과 상기 제3 인덱스와 관련되는 UL Tx 후보 빔들을 포함하는, 방법.
- 제9 항에 있어서,상기 적어도 하나의 단말은 복수의 단말들을 포함하고,상기 적어도 하나의 후보 빔 셋은 복수의 후보 빔 셋들을 포함하고,각각의 상기 복수의 후보 빔 셋들은 각각의 상기 복수의 단말들의 단말 식별자(UE identifier, UE ID)에 기반하여 각각의 상기 복수의 단말들과 연관되는, 방법.
- 제9 항에 있어서,상기 적어도 하나의 후보 빔 셋은 복수의 후보 빔 쌍(candidate beam pair)들을 포함하고,각각의 상기 복수의 빔 쌍들은 하나의 DL Tx 후보 빔과 하나의 UL Tx 후보 빔을 포함하고,상기 제2 인덱스 및 상기 제3 인덱스는 상기 복수의 후보 빔 쌍들 중 하나의 후보 빔 쌍 내 DL Tx 후보 빔 및 UL Tx 후보 빔과 관련되는, 방법.
- 제9 항에 있어서,상기 복수의 가용 빔들의 상기 제1 인덱스들과 관련된 제1 정보는,각각의 상기 복수의 가용 빔들의 빔 폭과 관련된 정보, 및복수의 멀티-빔 셋들과 관련된 정보를 더 포함하고,각각의 상기 복수의 멀티 빔 셋들은 상기 복수의 가용 빔들 중 동시에 하향링크 전송이 가능한 복수의 DL Tx 빔들의 조합, 또는 상기 복수의 가용 빔들 중 동시에 상향링크 수신이 가능한 복수의 UL Rx 빔들의 조합과 관련되는, 방법.
- 제13 항에 있어서,상기 제2 정보는 상기 적어도 하나의 후보 빔 셋과 상기 복수의 멀티-빔 셋들 간 매핑 관계와 관련된 정보를 포함하고,상기 제3 정보는 상기 매핑 관계에 기반하여 상기 복수의 멀티-빔 셋들 중 하나의 멀티-빔 셋의 인덱스를 포함하고,상기 적어도 하나의 후보 빔 셋과 매핑 관계가 설정되는 상기 복수의 멀티-빔 셋들은 총 빔 폭이 설정된 빔 폭보다 작거나 같은, 방법.
- 통신 시스템에서 전자 장치에 있어서,송수신기;적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 동작 가능하게 접속 가능하고, 상기 적어도 하나의 프로세서에 의해 실행될 때, 동작들을 수행하는 지시(instruction)들을 저장하는 적어도 하나의 메모리를 포함하며,상기 동작들은,제1 항 내지 제7 항 중 어느 한 항에 따른 방법의 모든 단계를 포함하는, 전자 장치.
- 통신 시스템에서 기지국(base station, BS)에 있어서,송수신기;적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서에 동작 가능하게 접속 가능하고, 상기 적어도 하나의 프로세서에 의해 실행될 때, 동작들을 수행하는 지시(instruction)들을 저장하는 적어도 하나의 메모리를 포함하며,상기 동작들은,제8 항 내지 제14 항 중 어느 한 항에 따른 방법의 모든 단계를 포함하는, 기지국.
- 통신 시스템에서 전자 장치를 제어하는 제어 장치에 있어서,적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서들에 동작 가능하게 접속된 적어도 하나의 메모리를 포함하고,상기 적어도 하나의 메모리들은, 상기 적어도 하나의 프로세서에 의해 실행되는 것에 기반하여, 동작들을 수행하는 지시(instruction)들을 저장하며,상기 동작들은,제1 항 내지 제7 항 중 어느 한 항에 따른 방법의 모든 단계를 포함하는, 제어 장치.
- 통신 시스템에서 기지국(base station, BS)을 제어하는 제어 장치에 있어서,적어도 하나의 프로세서; 및상기 적어도 하나의 프로세서들에 동작 가능하게 접속된 적어도 하나의 메모리를 포함하고,상기 적어도 하나의 메모리들은, 상기 적어도 하나의 프로세서에 의해 실행되는 것에 기반하여, 동작들을 수행하는 지시(instruction)들을 저장하며,상기 동작들은,제8 항 내지 제14 항 중 어느 한 항에 따른 방법의 모든 단계를 포함하는, 제어 장치.
- 하나 이상의 명령어를 저장하는 하나 이상의 비일시적인(non-transitory) 컴퓨터 판독 가능 매체에 있어서,상기 하나 이상의 명령어는, 하나 이상의 프로세서에 의해 실행되는 것에 기반하여, 동작들을 수행하고,상기 동작들은,제1 항 내지 제7 항 중 어느 한 항에 따른 방법의 모든 단계를 포함하는, 컴퓨터 판독 가능 매체.
- 하나 이상의 명령어를 저장하는 하나 이상의 비일시적인(non-transitory) 컴퓨터 판독 가능 매체에 있어서,상기 하나 이상의 명령어는, 하나 이상의 프로세서에 의해 실행되는 것에 기반하여, 동작들을 수행하고,상기 동작들은,제8 항 내지 제14 항 중 어느 한 항에 따른 방법의 모든 단계를 포함하는, 컴퓨터 판독 가능 매체.
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| US18/852,295 US20250202552A1 (en) | 2022-03-31 | 2023-03-28 | Method and device for performing adaptive beamforming in wireless communication system |
| EP23781301.9A EP4503698A4 (en) | 2022-03-31 | 2023-03-28 | Method and apparatus for performing adaptive beamforming in a wireless communication system |
| CN202380031353.5A CN119014030A (zh) | 2022-03-31 | 2023-03-28 | 用于在无线通信系统中执行自适应波束成形的方法和设备 |
| KR1020247031533A KR20240153372A (ko) | 2022-03-31 | 2023-03-28 | 무선 통신 시스템에서 적응적 빔포밍 수행 방법 및 장치 |
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| KR20240020678A (ko) * | 2022-08-08 | 2024-02-15 | 한국전자통신연구원 | 무선 통신 시스템에서 통신 장치의 빔 관리를 위한방법 및 상기 방법을 이용하는 장치 |
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| JP2020509626A (ja) * | 2017-01-09 | 2020-03-26 | ソニーモバイルコミュニケーションズ株式会社 | 基地局制御型ビーム管理 |
| US20210352646A1 (en) * | 2018-09-20 | 2021-11-11 | Beijing Xiaomi Mobile Software Co., Ltd. | Communication method and apparatus, terminal, base station, and storage medium |
| US20220053486A1 (en) * | 2020-08-14 | 2022-02-17 | Qualcomm Incorporated | Control signal design for smart repeater devices |
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| JP2020509626A (ja) * | 2017-01-09 | 2020-03-26 | ソニーモバイルコミュニケーションズ株式会社 | 基地局制御型ビーム管理 |
| US20210352646A1 (en) * | 2018-09-20 | 2021-11-11 | Beijing Xiaomi Mobile Software Co., Ltd. | Communication method and apparatus, terminal, base station, and storage medium |
| US20220053486A1 (en) * | 2020-08-14 | 2022-02-17 | Qualcomm Incorporated | Control signal design for smart repeater devices |
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| WO2025140301A1 (zh) * | 2023-12-27 | 2025-07-03 | 华为技术有限公司 | 一种中继通信方法以及通信装置 |
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| EP4503698A1 (en) | 2025-02-05 |
| CN119014030A (zh) | 2024-11-22 |
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