WO2023191405A1 - 무선통신 시스템에서 장치의 동작 방법 및 상기 방법을 이용하는 장치 - Google Patents
무선통신 시스템에서 장치의 동작 방법 및 상기 방법을 이용하는 장치 Download PDFInfo
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- WO2023191405A1 WO2023191405A1 PCT/KR2023/004005 KR2023004005W WO2023191405A1 WO 2023191405 A1 WO2023191405 A1 WO 2023191405A1 KR 2023004005 W KR2023004005 W KR 2023004005W WO 2023191405 A1 WO2023191405 A1 WO 2023191405A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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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
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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
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
- H04B7/15507—Relay station based processing for cell extension or control of coverage area
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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
- 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
- H04B7/15542—Selecting at relay station its transmit and receive resources
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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
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
- H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal where the received signal is a power saving command
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
- H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
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- H—ELECTRICITY
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- 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
- H04W72/25—Control channels or signalling for resource management between terminals via a wireless link, e.g. sidelink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
- H04W80/02—Data link layer protocols
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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
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- H—ELECTRICITY
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- 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
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- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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- H—ELECTRICITY
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- H04W92/00—Interfaces specially adapted for wireless communication networks
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- H—ELECTRICITY
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- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W92/00—Interfaces specially adapted for wireless communication networks
- H04W92/04—Interfaces between hierarchically different network devices
- H04W92/14—Interfaces between hierarchically different network devices between access point controllers and backbone network device
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- This disclosure relates to a method of operating a device in a wireless communication system and a device using the method.
- next-generation wireless access technology considering expanded mobile broadband communication, massive MTC, URLLC (Ultra-Reliable and Low Latency Communication), etc. is being discussed, and in this disclosure, for convenience, the technology is referred to as the technology. is called new RAT or NR.
- a repeater may also be referred to as a repeater
- the forwarding frequency band/resource that performs forwarding is fixed. Then, for example, even if the terminal transmits a signal only in a part of the forwarding frequency band, the repeater receives the signal and performs forwarding in the entire forwarding frequency band. As a result, not only the terminal's signals in some of the frequency bands are forwarded, but also noise in the remaining frequency bands is also forwarded. In this way, the repeater consumes unnecessary power and can cause a lot of interference to surrounding terminals/base stations.
- NCR network-controlled repeater
- NCR When NCR performs forwarding operations in a multi-carrier environment, it may be necessary to perform different forwarding operations for each carrier/frequency resource included in the multiple carriers. For example, different beam directions may be applied to the forwarding operation for each carrier, or the presence or absence of a signal to be forwarded for each carrier may be different.
- the technical problem that the present disclosure aims to solve is to provide a method of operating a device in a wireless communication system and a device that uses the method.
- a method and apparatus for operating a network-controlled repeater (NCR) including mobile termination (MT) and NCR-forwarding (Fwd) are provided.
- the NCR performs an initial connection procedure with the network through the NCR-MT, and receives a plurality of side control information from the network through the NCR-MT, such as first side control information and second side control information. receives.
- a first forwarding operation is performed through the NCR-Fwd in the first frequency band based on the first side control information
- a second forwarding operation is performed in the second frequency band based on the second side control information. Forwarding operation is performed through the NCR-Fwd.
- NCR according to the present disclosure can operate even in a multi-carrier environment.
- NCR receives independent side control information for each frequency band/carrier/resource performing forwarding, so it can perform different forwarding operations for each frequency band/carrier/resource, thereby reducing unnecessary power consumption. , interference to nearby terminals/base stations can also be reduced.
- Figure 1 illustrates the system structure of a next-generation radio access network (NG-RAN) to which NR is applied.
- NG-RAN next-generation radio access network
- Figure 2 is a block diagram showing the radio protocol architecture for the user plane.
- Figure 3 is a block diagram showing the wireless protocol structure for the control plane.
- Figure 4 illustrates the functional division between NG-RAN and 5GC.
- Figure 5 illustrates a frame structure that can be applied in NR.
- Figure 6 illustrates the slot structure of an NR frame.
- Figure 7 illustrates the core set.
- Figure 8 shows an example of a frame structure for a new wireless access technology.
- Figure 9 illustrates the structure of a self-contained slot.
- FIG. 10 illustrates physical channels and typical signal transmission.
- Figure 11 illustrates transport network architectures for 5G.
- Figure 12 shows an example of a topology in which NCR performs transmission and reception between a base station and a terminal.
- Figure 13 is a diagram comparing the operation of NCR and an existing RF repeater.
- Figure 14 illustrates the link between the base station, NCR, and terminal.
- Figure 15 shows an example of NCR operating in a multi-carrier environment.
- Figure 16 is an example of NCR operation when side control information is transmitted through MAC-CE.
- Figure 17 is another example of NCR operation when side control information is transmitted through MAC-CE.
- Figure 18 shows an example of NCR operation when side control information is transmitted through DCI.
- Figure 19 shows another example of NCR operation when side control information is transmitted through DCI.
- Figure 20 illustrates a method of operating NCR including NCR-MT and NCR-Fwd in a wireless communication system.
- Figure 21 illustrates a method of operating a base station in a wireless communication system.
- 22 illustrates a wireless device that can be applied herein.
- Figure 23 shows an example of a signal processing module structure.
- Figure 24 shows another example of the signal processing module structure.
- Figure 25 shows an example of a wireless communication device according to an implementation example of the present disclosure.
- 26 shows another example of a wireless device.
- Figure 27 shows another example of a wireless device applied to this specification.
- Figure 28 illustrates the communication system 1 applied herein.
- a or B may mean “only A,” “only B,” or “both A and B.” In other words, in this specification, “A or B” may be interpreted as “A and/or B.”
- A, B or C means “only A,” “only B,” “only C,” or “any and all combinations of A, B, and C ( It can mean “any combination of A, B and C)”.
- the slash (/) or comma used in this specification may mean “and/or.”
- A/B can mean “A and/or B.”
- 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.”
- the expression “at least one of A or B” or “at least one of A and/or B” means “at least one It can be interpreted the same as “at least one of A and B.”
- At least one of A, B and C means “only A”, “only B”, “only C”, or “A, B and C”. It can mean “any combination of A, B and C.”
- 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.”
- control information may be proposed as an example of “control information.”
- control information in this specification is not limited to “PDCCH,” and “PDCCH” may be proposed as an example of “control information.”
- PDCCH control information
- a wireless communication system to which the present disclosure can be applied may also be called, for example, an Evolved-UMTS Terrestrial Radio Access Network (E-UTRAN), or a Long Term Evolution (LTE)/LTE-A system.
- E-UTRAN Evolved-UMTS Terrestrial Radio Access Network
- LTE Long Term Evolution
- E-UTRAN includes a base station (BS) that provides a control plane and user plane to user equipment (UE).
- Terminals can be fixed or mobile, and are referred to by other terms such as MS (Mobile station), UT (User Terminal), SS (Subscriber Station), MT (mobile terminal), Wireless Device, and terminal. It can be called A base station refers to a fixed station that communicates with a terminal, and may be called other terms such as eNB (evolved-NodeB), BTS (Base Transceiver System), and access point.
- BS base station
- UE User Equipment
- Terminals can be fixed or mobile, and are referred to by other terms such as MS (Mobile station), UT (User Terminal), SS (Subscriber Station), MT (mobile terminal), Wireless Device, and terminal.
- MS Mobile station
- UT User Terminal
- SS Subscriber Station
- MT mobile terminal
- Wireless Device Wireless Device
- a base station refers to a fixed station that communicates with a terminal, and
- Base stations can be connected to each other through the X2 interface.
- the base station is connected to the Evolved Packet Core (EPC) through the S1 interface, and more specifically, to the Mobility Management Entity (MME) through S1-MME and to the Serving Gateway (S-GW) through S1-U.
- EPC Evolved Packet Core
- MME Mobility Management Entity
- S-GW Serving Gateway
- EPC consists of MME, S-GW, and P-GW (Packet Data Network-Gateway).
- the MME has information about the terminal's connection information or terminal capabilities, and this information is mainly used for terminal mobility management.
- S-GW is a gateway with E-UTRAN as an endpoint
- P-GW is a gateway with PDN as an endpoint.
- next-generation wireless access technology considering expanded mobile broadband communication, massive MTC, URLLC (Ultra-Reliable and Low Latency Communication), etc. is being discussed, and in this disclosure, for convenience, the technology is referred to as the technology. is called new radio access technology (new RAT, NR).
- new RAT new radio access technology
- Figure 1 illustrates the system structure of a next-generation radio access network (NG-RAN) to which NR is applied.
- NG-RAN next-generation radio access network
- NG-RAN may include a gNB and/or eNB that provide user plane and control plane protocol termination to the UE.
- Figure 1 illustrates a case including only gNB.
- gNBs eNBs
- eNBs are connected to each other through Xn interfaces.
- gNB and eNB are connected through the 5G Core Network (5GC) and NG interface. More specifically, it is connected to the access and mobility management function (AMF) through the NG-C interface, and to the user plane function (UPF) through the NG-U interface.
- AMF access and mobility management function
- UPF user plane function
- the layers of the Radio Interface Protocol between the terminal and the network are L1 (Layer 1) based on the lower three layers of the Open System Interconnection (OSI) standard model, which is widely known in communication systems. ), L2 (layer 2), and L3 (layer 3).
- L1 Layer 1
- L2 layer 2
- L3 layer 3
- the physical layer belonging to the first layer provides information transfer service using a physical channel.
- the RRC (Radio Resource Control) layer located in the third layer plays the role of controlling radio resources between the terminal and the network.
- the RRC layer exchanges RRC messages between the terminal and the base station.
- Figure 2 is a block diagram showing the radio protocol architecture for the user plane.
- Figure 3 is a block diagram showing the wireless protocol structure for the control plane.
- the user plane is a protocol stack for transmitting user data
- the control plane is a protocol stack for transmitting control signals.
- the physical layer provides an information transfer service to the upper layer using a physical channel.
- the physical layer is connected to the MAC (Medium Access Control) layer, the upper layer, through a transport channel. Data moves between the MAC layer and the physical layer through the transport channel. Transmission channels are classified according to how and with what characteristics data is transmitted through the wireless interface.
- MAC Medium Access Control
- the physical channel can be modulated using OFDM (Orthogonal Frequency Division Multiplexing), and time and frequency are used as radio resources.
- OFDM Orthogonal Frequency Division Multiplexing
- the functions of the MAC layer include mapping between logical channels and transport channels and multiplexing/demultiplexing of MAC SDUs (service data units) belonging to logical channels onto transport blocks provided through physical channels.
- the MAC layer provides services to the RLC (Radio Link Control) layer through logical channels.
- the functions of the RLC layer include concatenation, segmentation, and reassembly of RLC SDUs.
- QoS Quality of Service
- RB Radio Bearer
- the RLC layer operates in Transparent Mode (TM), Unacknowledged Mode (UM), and Acknowledged Mode. It provides three operation modes: , AM).
- AM RLC provides error correction through automatic repeat request (ARQ).
- the Radio Resource Control (RRC) layer is defined only in the control plane.
- the RRC layer is responsible for controlling logical channels, transport channels, and physical channels in relation to configuration, re-configuration, and release of radio bearers.
- RB refers to the logical path provided by the first layer (PHY layer) and the second layer (MAC layer, RLC layer, PDCP layer) for data transfer between the terminal and the network.
- the functions of the Packet Data Convergence Protocol (PDCP) layer in the user plane include forwarding, header compression, and ciphering of user data.
- the functions of the Packet Data Convergence Protocol (PDCP) layer in the control plane include forwarding and encryption/integrity protection of control plane data.
- Setting an RB means the process of defining the characteristics of the wireless protocol layer and channel and setting each specific parameter and operation method to provide a specific service.
- RB can be further divided into SRB (Signaling RB) and DRB (Data RB).
- SRB is used as a path to transmit RRC messages in the control plane
- DRB is used as a path to transmit user data in the user plane.
- the UE If an RRC Connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, the UE is in the RRC connected state. Otherwise, the UE is in the RRC idle state.
- Downlink transmission channels that transmit data from the network to the terminal include the BCH (Broadcast Channel), which transmits system information, and the downlink SCH (Shared Channel), which transmits user traffic or control messages.
- BCH Broadcast Channel
- the downlink SCH Shared Channel
- uplink transmission channels that transmit data from the terminal to the network include RACH (Random Access Channel), which transmits initial control messages, and uplink SCH (Shared Channel), which transmits user traffic or control messages.
- Logical channels located above the transport channel and mapped to the transport channel include BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel), and MTCH (Multicast Traffic). Channel), etc.
- BCCH Broadcast Control Channel
- PCCH Paging Control Channel
- CCCH Common Control Channel
- MCCH Multicast Control Channel
- MTCH Multicast Traffic. Channel
- a physical channel consists of several OFDM symbols in the time domain and several sub-carriers in the frequency domain.
- One sub-frame consists of a plurality of OFDM symbols in the time domain.
- a resource block is a resource allocation unit and consists of a plurality of OFDM symbols and a plurality of sub-carriers. Additionally, each subframe may use specific subcarriers of specific OFDM symbols (e.g., the first OFDM symbol) of the subframe for the Physical Downlink Control Channel (PDCCH), that is, the L1/L2 control channel.
- PDCCH Physical Downlink Control Channel
- TTI Transmission Time Interval
- Figure 4 illustrates the functional division between NG-RAN and 5GC.
- gNB performs inter-cell radio resource management (Inter Cell RRM), radio bearer management (RB control), connection mobility control, radio admission control, and measurement configuration and provision.
- Functions such as (Measurement configuration & Provision) and dynamic resource allocation can be provided.
- AMF can provide functions such as NAS security and idle state mobility handling.
- UPF can provide functions such as mobility anchoring and PDU processing.
- SMF Session Management Function
- Figure 5 illustrates a frame structure that can be applied in NR.
- a radio frame (hereinafter abbreviated as a frame) can be used for uplink and downlink transmission in NR.
- a frame has a length of 10ms and can be defined as two 5ms half-frames (HF).
- a half-frame can be defined as five 1ms subframes (Subframe, SF).
- a subframe can be 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). When normal 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).
- Table 1 below illustrates the subcarrier spacing configuration (may also be referred to as subcarrier spacing configuration) ⁇ .
- Table 2 illustrates the number of slots in a frame (N frame ⁇ slot ), the number of slots in a subframe (N subframe ⁇ slot ), and the number of symbols in a slot (N slot symb ), etc., according to the subcarrier spacing configuration ⁇ . .
- Table 2-1 illustrates that when an extended CP is used, the number of symbols per slot, the number of slots per frame, and the number of slots per subframe vary depending on the SCS.
- OFDM(A) numerology eg, SCS, CP length, etc.
- OFDM(A) numerology eg, SCS, CP length, etc.
- the (absolute time) interval of time resources e.g., SF, slot, or TTI
- TU Time Unit
- Figure 6 illustrates the slot structure
- a slot may include multiple symbols in the time domain. For example, in the case of normal CP, one slot includes 14 symbols (or 7 symbols), but in the case of extended CP, one slot may include 12 symbols (or 6 symbols).
- a carrier may include multiple subcarriers in the frequency domain.
- RB Resource Block
- 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
- a physical downlink control channel may be composed of one or more control channel elements (CCEs) as shown in Table 3 below.
- CCEs control channel elements
- the PDCCH can be transmitted through resources consisting of 1, 2, 4, 8, or 16 CCEs.
- the CCE consists of six resource element groups (REGs), and one REG consists of one resource block in the frequency domain and one orthogonal frequency division multiplexing (OFDM) symbol in the time domain.
- REGs resource element groups
- OFDM orthogonal frequency division multiplexing
- Monitoring means decoding each PDCCH candidate according to the downlink control information (DCI) format.
- the UE monitors a set of PDCCH candidates in one or more core sets (CORESET, described below) on the activated DL BWP of each activated serving cell for which PDCCH monitoring is configured, according to the corresponding search space set.
- CORESET core sets
- a new unit called control resource set can be introduced.
- the UE can receive the PDCCH from the core set.
- Figure 7 illustrates the core set.
- the coreset may be composed of N CORESET RB resource blocks in the frequency domain and N CORESET symb ⁇ ⁇ 1, 2, 3 ⁇ symbols in the time domain.
- N CORESET RB and N CORESET symb can be provided by the base station through higher layer signals.
- a plurality of CCEs may be included in the core set.
- the UE may attempt to detect the PDCCH in units of 1, 2, 4, 8, or 16 CCEs within the core set.
- One or more CCEs that can attempt PDCCH detection may be referred to as PDCCH candidates.
- the terminal can be configured with multiple coresets.
- the control area in a conventional wireless communication system is configured over the entire system band used by the base station. Except for some terminals that support only a narrow band (e.g., eMTC/NB-IoT terminals), all terminals must receive wireless signals of the entire system band of the base station in order to properly receive/decode the control information transmitted by the base station. I had to be able to.
- the core set can be said to be a radio resource for control information that the terminal must receive, and can only use part of the system band instead of the entire system band in the frequency domain. Additionally, only some of the symbols within a slot can be used in the time domain.
- the base station can assign a core set to each terminal and transmit control information through the assigned core set. A terminal in NR can receive control information from the base station even if it does not necessarily receive the entire system band.
- the core set may include a terminal-specific core set for transmitting terminal-specific control information and a common core set for transmitting control information common to all terminals.
- NR may require high reliability depending on the application field, and in this situation, downlink control information (DCI) transmitted through a downlink control channel (e.g., physical downlink control channel: PDCCH) ), the target BLER (block error rate) can be significantly lower than that of the prior art.
- DCI downlink control information
- PDCCH physical downlink control channel
- the target BLER block error rate
- the amount of content included in DCI can be reduced and/or the amount of resources used when transmitting DCI can be increased.
- the resources may include at least one of resources in the time domain, resources in the frequency domain, resources in the code domain, and resources in the spatial domain.
- Figure 8 shows an example of a frame structure for a new wireless access technology.
- a structure in which the control channel and the data channel are time division multiplexed (TDM) within one TTI is considered as a frame structure. It can be.
- the hatched area represents the downlink control area, and the black portion represents the uplink control area.
- An unmarked area may be used for transmitting downlink data (DL data) or may be used for transmitting uplink data (UL data).
- DL data downlink data
- UL data uplink data
- the characteristic of this structure is that downlink (DL) transmission and uplink (UL) transmission proceed sequentially within one subframe, DL data is sent within the subframe, and UL ACK/ You can also receive NACK (Acknowledgement/Not-acknowledgement). As a result, the time it takes to retransmit data when a data transmission error occurs is reduced, thereby minimizing the latency of final data transmission.
- the base station and the terminal use a type gap (time gap) for the transition process from transmission mode to reception mode or from reception mode to transmission mode. ) is needed.
- some OFDM symbols at the time of transition from DL to UL in the self-contained subframe structure can be set as a guard period (GP).
- Figure 9 illustrates the structure of a self-contained slot.
- a DL control channel, DL or UL data, UL control channel, etc. may 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 used for UL data transmission.
- the following configuration may be
- DL area (i) DL data area, (ii) DL control area + DL data area
- UL area (i) UL data area, (ii) UL data area + UL control area
- a PDCCH may be transmitted in the DL control area, and a physical downlink shared channel (PDSCH) may be transmitted in the DL data area.
- a physical uplink control channel (PUCCH) may be transmitted in the UL control area, and a physical uplink shared channel (PUSCH) may be transmitted in the UL data area.
- DCI Downlink Control Information
- DL data scheduling information for example, DL data scheduling information, UL data scheduling information, etc.
- UCI Uplink Control Information
- ACK/NACK Positive Acknowledgment/Negative Acknowledgment
- CSI Channel State Information
- SR Scheduling Request
- mmW millimeter wave
- the wavelength is shortened, making it possible to install multiple antenna elements in the same area. That is, in the 30GHz band, the wavelength is 1cm, so a total of 100 antenna elements can be installed in a two-dimensional array at 0.5 wavelength (lambda) intervals on a 5 by 5 cm panel. Therefore, in mmW, multiple antenna elements are used to increase beamforming (BF) gain to increase coverage or increase throughput.
- BF beamforming
- TXRU transceiver unit
- installing TXRU on all 100 antenna elements has the problem of being less effective in terms of price. Therefore, a method of mapping multiple antenna elements to one TXRU and controlling the direction of the beam with an analog phase shifter is being considered.
- This analog beamforming method has the disadvantage of being unable to provide frequency-selective beamforming because it can only create one beam direction in the entire band.
- Hybrid beamforming which is an intermediate form between digital beamforming (Digital BF) and analog beamforming (analog BF)
- B TXRUs which is less than Q antenna elements.
- B TXRUs which is less than Q antenna elements.
- analog beamforming (or RF beamforming) performs precoding (or combining) at the RF stage, which results in the number of RF chains and the number of D/A (or A/D) converters. It has the advantage of being able to achieve performance close to digital beamforming while reducing .
- the hybrid beamforming structure can be expressed as N TXRUs and M physical antennas.
- the digital beamforming for the L data layers to be transmitted at the transmitting end can be expressed as an N by L matrix, and then the converted N digital signals are converted into analog signals through the TXRU. After conversion, analog beamforming expressed as an M by N matrix is applied.
- System information of the NR system may be transmitted by broadcasting.
- analog beams belonging to different antenna panels within one symbol can be transmitted simultaneously, and a single analog beam (corresponding to a specific antenna panel) is applied and transmitted to measure the channel for each analog beam (reference signal).
- a plan to introduce a beam reference signal (Beam RS: BRS) is being discussed.
- the BRS may be defined for a plurality of antenna ports, and each antenna port of the BRS may correspond to a single analog beam.
- the synchronization signal or xPBCH can be transmitted by applying all analog beams in the analog beam group so that any UE can receive it well.
- a synchronization signal block (SSB, or may also be referred to as a synchronization signal and physical broadcast channel (SS/PBCH)) in the time domain is a number from 0 to 3 within the synchronization signal block. It may consist of four OFDM symbols numbered in ascending order, and includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a demodulation reference signal (DMRS). Associated PBCHs can be mapped to symbols. As described above, the synchronization signal block can also be expressed as an SS/PBCH block.
- PSS primary synchronization signal
- SSS secondary synchronization signal
- DMRS demodulation reference signal
- Associated PBCHs can be mapped to symbols.
- the synchronization signal block can also be expressed as an SS/PBCH block.
- multiple synchronization signal blocks can be transmitted at different times, and SSB can be used to perform initial access (IA), serving cell measurement, etc., so they can be transmitted with other signals
- IA initial access
- serving cell measurement etc.
- the network can broadcast the transmission time and resource information of the SSB or indicate it through UE-specific RRC signaling.
- BFR beam failure recovery
- BFR is not a process for declaring an error/failure on the link between the network and the terminal, it can be assumed that the connection with the current serving cell is maintained even if the BFR process is performed.
- measurements are performed on different beams (beams can be expressed as CSI-RS ports or SSB (synchronization signal block) indexes, etc.) set by the network, and the best beam for the corresponding terminal is selected. You can choose.
- the terminal can proceed with the BFR process by performing the RACH process associated with the beam with good measurement results.
- the TCI status can be set for each core set of the control channel, and parameters for determining the terminal's reception (Rx) beam can be determined based on the TCI status.
- the UE For each downlink bandwidth portion (DL BWP) of the serving cell, the UE can be configured with three or fewer coresets. Additionally, for each core set, the terminal can receive the following information.
- DL BWP downlink bandwidth portion
- Core set index p (e.g., one of 0 to 11, the index of each core set may be uniquely determined in the BWPs of one serving cell),
- TCI transmission configuration indication
- the two antenna ports are said to be in quasi co-location (QCL).
- QCL quasi co-location
- channel conditions may be defined by, for example, Doppler shift, Doppler spread, average delay, delay spread, spatial reception parameters, etc.
- the 'TCI-State' parameter associates one or two downlink reference signals with the corresponding QCL type (there are QCL types A, B, C, and D, see Table 4).
- Each 'TCI-State' is used to establish a quasi-collocation (QCL) relationship between one or two downlink reference signals and the DM-RS port of the PDSCH (or PDCCH), or the CSI-RS port of the CSI-RS resource.
- QCL quasi-collocation
- the UE in each DL BWP configured for the UE in one serving cell, the UE can be provided with 10 or less search space sets.
- the terminal For each search space set, the terminal may be provided with at least one of the following information.
- Search space set index s (0 ⁇ s ⁇ 40), 2) Association between core set P and search space set s, 3) PDCCH monitoring cycle and PDCCH monitoring offset (slot unit), 4) Within slot PDCCH monitoring pattern (e.g., indicating the first symbol of the core set within a slot for PDCCH monitoring), 5) the number of slots in which the search space set s exists, 6) the number of PDCCH candidates for each CCE aggregation level, 7) search Information indicating whether the spatial set s is CSS or USS, etc.
- Coreset #0 can be configured by PBCH (or UE-specific signaling or PSCell configuration or BWP configuration for handover).
- the search space (SS) set #0 set by the PBCH may have different monitoring offsets (eg, slot offset, symbol offset) for each associated SSB. This may be necessary to minimize the search space occasion that the terminal must monitor. Alternatively, it means providing a beam sweeping control/data area that can transmit control/data according to each beam to enable continuous communication with the terminal in a situation where the best beam of the terminal changes dynamically. It may also be necessary.
- FIG. 10 illustrates physical channels and typical signal transmission.
- 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.
- a terminal that is turned on again from a power-off state or newly entered a cell performs an initial cell search task, such as synchronizing with the base station (S11).
- the terminal receives the Primary Synchronization Channel (PSCH) and Secondary Synchronization Channel (SSCH) from the base station, synchronizes with the base station, and obtains information such as cell ID (cell identity).
- the terminal can obtain intra-cell broadcast information by receiving a Physical Broadcast Channel (PBCH) from the base station.
- PBCH Physical Broadcast Channel
- the terminal can check the downlink channel status by receiving a DL RS (Downlink Reference Signal) in the initial cell search stage.
- DL RS Downlink Reference Signal
- (Initial) cell search can be said to be a procedure in which the terminal obtains time and frequency synchronization with a cell and detects the cell ID of the cell.
- Cell search may be based on the cell's primary synchronization signal and secondary synchronization signal, and PBCH DMRS.
- the terminal that has completed the initial cell search can obtain more specific system information by receiving a Physical Downlink Control Channel (PDCCH) and a corresponding Physical Downlink Control Channel (PDSCH) (S12).
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Control Channel
- the terminal may perform a random access procedure (Random Access Procedure) to complete connection to the base station (S13 to S16). Specifically, the terminal may transmit a preamble through PRACH (Physical Random Access Channel) (S13) and receive a Random Access Response (RAR) for the preamble through the PDCCH and the corresponding PDSCH (S14). Afterwards, the terminal can transmit a PUSCH (Physical Uplink Shared Channel) using the scheduling information in the RAR (S15) and perform a contention resolution procedure such as the PDCCH and the corresponding PDSCH (contention resolution message It can be said to be a process of receiving) (S16).
- PRACH Physical Random Access Channel
- RAR Random Access Response
- the terminal can transmit a PUSCH (Physical Uplink Shared Channel) using the scheduling information in the RAR (S15) and perform a contention resolution procedure such as the PDCCH and the corresponding PDSCH (contention resolution message It can be said to be a process of receiving) (S16).
- the terminal that has performed the above-described procedure can then perform PDCCH/PDSCH reception (S17) and PUSCH/PUCCH (Physical Uplink Control Channel) transmission (S18) as a general uplink/downlink signal transmission procedure.
- the control information transmitted from the terminal to the base station is called UCI (Uplink Control Information).
- UCI includes HARQ ACK/NACK (Hybrid Automatic Repeat and reQuest Acknowledgment/Negative-ACK), SR (Scheduling Request), and CSI (Channel State Information).
- CSI includes Channel Quality Indicator (CQI), Precoding Matrix Indicator (PMI), Rank Indication (RI), etc.
- UCI is generally transmitted through PUCCH, but when control information and data must be transmitted simultaneously, it can be transmitted through PUSCH. Additionally, according to the network's request/instruction, the terminal may transmit UCI aperiodically through PUSCH.
- BWP bandwidth adaptation
- the terminal's receive and transmit bandwidth need not be as wide as the cell's bandwidth and can be adjusted: the width can be commanded to vary (e.g. during periods of low activity to save power). during contraction), the location in the frequency domain can be moved (e.g., to increase scheduling flexibility), and the subcarrier spacing can be ordered to change (e.g., to allow different services).
- a subset of the total cell bandwidth of a cell is referred to as a bandwidth part (BWP) and the BA is obtained by configuring BWP(s) to the UE and informing the UE which of the BWPs configured to the UE is currently active. Once the BA is established, the UE only needs to monitor the PDCCH on one active BWP.
- BWP bandwidth part
- the BWP Inactive Timer (independent of the DRX Inactive Timer described above) is used to switch the active BWP to the default BWP: the timer is restarted upon successful PDCCH decoding, and when the timer expires, a switch to the default BWP occurs. do.
- the integrated access and backhaul link (IAB) is described.
- the proposed method is described based on the new RAT (NR) system, but the range of systems to which the proposed method is applied can be expanded to other systems such as the 3GPP LTE/LTE-A system in addition to the NR system.
- IAB integrated access and backhaul links
- the node may mean a donor gNB (DgNB) or a relay node (RN).
- DgNB donor gNB
- RN relay node
- the DgNB or donor node may be a gNB that provides the function of supporting backhaul for IAB nodes.
- relay node 1 When relay node 1 and relay node 2 exist, relay node 1 is connected to relay node 2 through a backhaul link and relays data transmitted to and received from relay node 2, and relay node 1 is called the parent node of relay node 2. node), and relay node 2 is called the child node of relay node 1.
- NCR Network-controlled repeater
- MT Mobile Termination
- RU remote unit
- NCR-MT network-controlled repeater
- NCR-Fwd forwarding
- Figure 11 illustrates transport network architectures for 5G.
- ITU-T Telecommunication Standardization Sector
- CU Centralized Unit
- DU Distributed Unit
- RU Remote Unit
- DU and RU implements the RF functions and, depending on the division of functions between the RU and DU, possibly also low-PHY and high-PHY functions.
- CUs, DUs and RUs can be grouped in different combinations to form actual physical network elements.
- CU, DU, and RU can be grouped in various combinations. This provides flexibility to accommodate a variety of network architectures, applications, and transport network requirements.
- the transport network between 5GC and CU is called backhaul.
- the backhaul network implements the 3GPP NG interface.
- the transmission network between CU and DU is called midhaul.
- the midhaul network implements the 3GPP F1 interface.
- the transmission network between DU and RU is called fronthaul.
- Backhaul, midhaul, and fronthaul can be collectively referred to as xhaul.
- a reconfigurable intelligent surface also known as an intelligent refecting surface (IRS) and a large intelligent surface (LIS), alters the electrical and magnetic properties of a surface to control the propagation of electromagnetic waves (EM). It is a programmable structure that can be used to control .
- RIS can be used to sense the wireless environment by integrating sensing functions. Deploying a RIS in the environment in which the wireless system operates allows at least partial control over the properties of the wireless channel.
- RIS The unique capabilities of RIS can provide several benefits, including the potential to improve reliability and coverage performance through beamforming or range extension.
- the existing wireless system design paradigm where wireless channels were mostly considered uncontrollable entities that distort transmitted signals, is changing somewhat.
- the transmitter (TX) and receiver (RX) are designed to evenly distribute the influence of the channel.
- TX transmitter
- RX receiver
- a (conventional) RF repeater is a non-regenerative type of relay node that simply amplifies and transmits everything it receives.
- the main advantages of RF repeaters are low cost, ease of deployment, and no increase in latency.
- the main disadvantage is that it can amplify signals and noise, contributing to increased interference (contamination) in the system.
- RF repeaters are specified in Rel-17 of RAN4 for FR1 band FDD/TDD and FR2 band.
- the Rel-17 Work Item Description contains only the RF requirements.
- RAN4 WIDs there is one that states, "Assume that the repeater does not perform adaptive beamforming toward the terminal.”
- Coverage is a fundamental aspect of cellular network deployment. Mobile carriers rely on various types of network nodes to provide comprehensive coverage. Deployment of regular full-stack cells is an option, but may not always be possible (e.g. if there is no backhaul availability) and may not be economically viable.
- IAB Integrated Access and Backhaul
- RF repeater Another type of network node is an RF repeater, which simply amplifies and transmits any signals it receives. RF repeaters have been widely deployed to supplement the coverage provided by regular full-stack cells in 2G, 3G, and 4G.
- RF repeaters provide a cost-effective means of extending network coverage, but they have limitations. RF repeaters simply perform the tasks of amplification and transmission without considering the various factors that can improve performance.
- the element may include information about semi-static and/or dynamic downlink/uplink settings, adaptive transmitter/receiver spatial beamforming, ON-OFF states, etc.
- a network control repeater has an improved function for receiving and processing side control information from the network compared to existing RF repeaters.
- 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 spatially directional transmission and reception, and simplified network integration.
- NCRs network control relays
- Network Control Repeaters are in-band RF repeaters used to extend network coverage in the FR1 and FR2 bands, and FR2 deployments can be prioritized for both outdoor and O2I scenarios.
- the network control relay may be transparent to the terminal.
- a network control repeater can simultaneously maintain a base station-repeater link and a repeater-terminal link.
- Cost efficiency is a key consideration for network control repeaters.
- NCR can be considered to be composed of RU and MT.
- Figure 12 shows an example of a topology in which NCR performs transmission and reception between a base station and a terminal.
- a CU and/or DU exist in the base station, and the NCR may be connected to the base station.
- NCR may be composed of MT and RU.
- the RU may be composed of only the RF layer.
- the RU can receive the signal transmitted by the base station at the RF terminal and forward it to the terminal, and can receive the signal transmitted by the terminal at the RF terminal and forward it to the base station.
- the RU only transmits signals between the base station and the terminal, but cannot generate signals/channels on its own and transmit them to the base station/terminal, or receive and detect signals/channels from the base station/terminal.
- the RU may consider adjusting the transmission/reception beam direction, DL/UL direction, ON/OFF status, transmission (Tx) power, etc. at the RF terminal.
- Tx transmission
- the operation of these RUs cannot be determined by the NCR on its own and can be completely controlled by the base station.
- 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.
- MT may be composed of an RF layer and L1/L2/L3 layers.
- the MT can detect/receive the signal/channel transmitted by the base station, and the MT can generate and transmit the signal/channel transmitted to the base station. Additionally, the MT can receive information necessary to control the operation of the RU (i.e., side control information) from the base station. MT does not perform transmission or reception with the terminal.
- Figure 13 is a diagram comparing the operation of NCR and an existing RF repeater.
- beamforming gain can be obtained by adaptively adjusting the Tx/Rx beam direction of the NCR according to the location of the terminal and the channel situation of the terminal, as shown in (b) of FIG. 13.
- the TDD system cannot distinguish between DL and UL directions, so transmission and reception in the DL and UL directions are always performed simultaneously.
- switching between the DL direction and the UL direction was performed using a fixed time pattern by applying only the fixed TDD settings.
- NCR can perform DL/UL switching by considering TDD settings. Through this, adaptive DL/UL operation is possible, and power waste caused by forwarding unnecessary signals can be reduced and interference can be reduced.
- the power of the received signal is always amplified and transmitted regardless of whether the base station or terminal transmits the signal. This causes unnecessary power waste and increases interference to the surrounding area.
- NCR an ON/OFF operation is performed, and when there is no signal to be transmitted to the base station / terminal, 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.
- NCR if a signal is transmitted with unnecessarily large power, the impact of interference on the surroundings is reduced by reducing the NCR's transmission power, and if a signal is transmitted with low power, the signal is stably transmitted to the receiver by increasing the NCR's transmission power. It can be delivered to .
- NCR in order to adaptively adjust beamforming, ON/OFF, DL/UL direction, Tx power, etc. as described above, NCR must know the transmission/reception boundaries of DL and UL. Through this, the RU operation can be applied differently for each unit time (eg, slot/symbol).
- Figure 14 illustrates the link between the base station, NCR, and terminal.
- NCR may include NCR-MT and NCR-Fwd.
- NCR-MT can be defined as a functional entity that communicates with a base station (gNB) over a control link (C-link) to enable information exchange (e.g. side control information).
- C-link may be based on the NR Uu interface.
- the side control information may be at least information for NCR-Fwd control.
- NCR-Fwd can be defined as a functional entity that performs amplification and transmission of UL/DL RF signals between the base station and the terminal (UE) through the backhaul link and access link. The operation of NCR-Fwd is controlled according to side control information received from the base station.
- NCR-Fwd may be referred to as RU
- NCR-MT may be simply referred to as MT.
- this disclosure proposes a method for an MT to receive RU side control information from a base station when NCR performs multi-carrier operation.
- the content of this disclosure is described assuming operation in NCR. However, the content of the present disclosure can also be applied to devices other than NCR. In particular, the content of the present disclosure can be applied to the operation of RIS. To this end, NCR mentioned in this disclosure can be replaced with RIS and expanded/interpreted.
- the RU plays the role of forwarding signals from the base station to the terminal in the RIS and forwarding signals from the terminal to the base station, and the MT receives side control information from the base station to control signal transmission of the RU. can perform its role.
- network can be interpreted as being replaced with a base station or CU/DU. Additionally, base station can be interpreted as being replaced by network, CU, and DU.
- the MT can receive information (i.e. side control information) necessary to control the operation of the RU from the base station.
- This side control information can be delivered through L1/L2 signaling such as DCI and MAC-CE.
- Side control information may include, for example, all or part of the following information.
- Beamforming information This may mean information about the Tx/Rx beam direction of the RU. This information may include beam directions for UL Tx to the base station, DL Rx from the base station, DL Tx to the terminal, and/or UL Rx from the terminal.
- Timing information to align transmission/reception boundaries of network-controlled repeater This may mean information for the RU to align the Tx/Rx slot or symbol boundary.
- Information on UL-DL TDD configuration This may mean information about the DL/UL direction of the RU.
- ON-OFF information for efficient interference management and improved energy efficiency may mean information about the ON-OFF operation of the RU.
- Power control information for efficient interference management may mean information about the transmission power of the RU. This information may include UL transmission power to the base station and/or DL transmission power to the terminal.
- cost efficiency may be an important factor in implementing and maintaining NCR. Considering this, it can be considered that the MT and RU of NCR share the same antenna and/or RF and operate in intra-band.
- the MT and RU use antennas and/or RF independently of each other.
- the MT and RU operate through different sub-band resources within the same band, or operate through different carrier frequencies.
- the antenna and RF may be used independently because the MT and RU are physically far away from each other or do not affect each other.
- NCR supports only single carrier operation, and in this case, it can be assumed that MT and RU operate on the same carrier.
- NCR can support multi-carrier operation.
- discussion is needed on the relationship between carriers on which MT and RU operate and how MT/RU operates on multiple carriers.
- a RU within the NCR may operate on multiple carriers, and in this case, it is necessary to distinguish which carrier the side control information received by the MT is for the RU operating on. Additionally, when an MT receives side control information for RUs operating on multiple carriers, it is necessary to define how to distinguish and receive side control information. Conventionally, since the case where NCR operates on multiple carriers was not considered, solutions to these problems were also not disclosed.
- This disclosure proposes a method for an MT to receive RU side control information from a base station when NCR performs multi-carrier operation.
- the NCR performs multi-carrier operation
- the relationship between the MT's operating carrier resources and the RU's operating carrier, and a method for the MT to receive side control information for the RU operating on multiple carriers from the base station are proposed. do.
- MT and RU can operate using frequency resources within that single carrier.
- the MT's operating frequency resources and the RU's operating frequency resources may overlap or non-overlap. That is, the operating frequency resources of the MT and the operating frequency resources of the RU may or may not overlap with each other.
- MT and/or RU may operate on multiple carriers.
- MT and RU can operate on each of all component carriers (CCs) on which NCR operates. For example, when NCR operates in 4 CCs, MT and RU can operate in each CC.
- CCs component carriers
- Figure 15 shows an example of NCR operating in a multi-carrier environment.
- MT and/or RU may operate only on some carriers.
- an MT may operate on only one CC and a RU may operate on all carriers. Referring to (b) of FIG. 15, when NCR operates in four CCs of CC0, CC1, CC2, and CC3, MT operates only in CC0, but RU operates in all four CCs (can operate) ).
- the MT's operating frequency resources and the RU's operating frequency resources may or may not overlap.
- the MT may determine that it receives side control information for RU operation in the serving cell in which it operates from the base station. That is, when the MT receives side control information from the serving cell, it can determine this as information applicable to the RU operating within the same serving cell.
- the MT can receive side control information for the RU as follows.
- a method for an MT to receive only side control information for a specific serving cell in a specific serving cell is 1.1.
- the MT may determine that it receives side control information for RU operation in a specific serving cell/CC through a specific serving cell/CC. That is, when the MT receives side control information from the serving cell, it can determine this as information applied for RU operation in the serving cell (component carrier). That is, the MT receives side control information for RU operation in CC#n from CC#n.
- the MT can receive side control information for RU operation in a specific single serving cell/CC where the corresponding NCR operates through a specific serving cell/CC. That is, when the MT receives side control information from the serving cell, it can determine this as information applicable to RU operation in a specific serving cell/CC. For this purpose, the MT can receive side control information for RU operation in CC#n from CC#m. At this time, n and m may be the same or different from each other.
- the side control information that the MT receives for each specific serving cell/CC is sent to one of the serving cells/CCs that exist in the same cell group (Cell Group: CG) as the serving cell/CC. It may be information about That is, the MT can receive side control information for one serving cell/CC belonging to the same CG as the serving cell/CC in a specific serving cell/CC.
- Cell Group CG
- the MT can receive side control information for one serving cell/CC belonging to the same CG as the serving cell/CC in a specific serving cell/CC.
- the serving cell/CC from which the MT can receive side control information for other serving cells/CCs may be limited to sPCell (special cell; may mean primary cell in MCG or PScell in SCG). there is.
- the MT can receive side control information for the corresponding serving cell/CC or another serving cell/CC within the same CG from the sPCell.
- the MT can receive side control information for the corresponding serving cell/CC from the remaining SCell.
- the MT must know which serving cell/CC receives side control information from a specific serving cell/CC. To this end, the MT can receive from the base station serving cell/CC information to which the side control information received for each serving cell/CC where the MT operates is applied. Alternatively, information about the serving cell/CC to which side control information for the corresponding serving cell/CC is transmitted can be set for each serving cell/CC. For example, the following information can be set.
- a cell ID i.e. PCID
- PCID cell ID to which the side control information received from the serving cell/CC is applied
- a cell ID (i.e., PCID) through which side control information for the corresponding serving cell/CC is transmitted can be set.
- the same cell ID i.e. PCID
- the MT When the MT is set (provided) with a cell ID to which the side control information received from the serving cell/CC is applied, the MT sets the side control information received from the serving cell/CC to the RU's signal from the cell with the cell ID. It can be judged that it applies to forwarding.
- the serving cell index (i.e., ServCellIndex) to which the side control information received from the corresponding serving cell/CC is applied can be set.
- a serving cell index (i.e., ServCellIndex) through which side control information for the corresponding serving cell/CC is transmitted can be set.
- the Information Element (IE) ServCellIndex is associated with a short ID used to uniquely identify a serving cell (i.e. PCell, PSCell or SCell) across a group of cells. A value of 0 applies to the PCell, while the previously assigned SCellIndex applies to the SCell.
- ServCellIndex is 0, and in the case of SCells, the SCellIndex set through SCellConfig when the SCell is set as shown below may mean the ServCellIndex.
- the MT uses the side control information received from the serving cell/CC to forward the RU signal on the carrier with the serving cell index. It can be judged that it applies.
- This configuration information can be set from the base station to the MT through RRC or MAC-CE.
- the MT does not receive the serving cell/CC information to which the side control information is applied, it can be assumed that the side control information received from the corresponding serving cell/CC is applied for RU operation in the same serving cell/CC. .
- the MT does not receive serving cell/CC information to which side control information is applied, it can be assumed that the side control information received from the serving cell/CC is applied for RU operation in the same sPCell (special cell). .
- the MT may receive side control information for RU operation in one or a plurality of serving cells/CCs in which the corresponding NCR operates through a specific serving cell/CC. That is, the MT can receive side control information for RU operation in a plurality of serving cells/CCs through a specific serving cell/CC.
- this may be side control information for RU operation in a specific serving cell/CC among a plurality of serving cells/CCs in which the NCR operates.
- this may include side control information for RU operation in one or a plurality of serving cells/CCs in which the NCR operates.
- the MT may receive side control information for one or a plurality of serving cells/CCs belonging to the same cell group (CG) as the serving cell/CC in a specific serving cell/CC.
- CG cell group
- the serving cell/CC from which the MT can receive side control information for other serving cell/CC(s) may be limited to the sPCell.
- the MT may receive side control information for a plurality of serving cells/CCs including the corresponding serving cell/CC and other serving cell/CC(s) belonging to the same CG in the sPCell.
- the MT can only receive side control information for the corresponding serving cell/CC from the remaining SCell.
- the serving cell/CC from which the MT can receive side control information may be limited to the sPCell.
- the MT can receive side control information for serving cells/CCs belonging to the same CG in the sPCell.
- MT does not receive side control information from the remaining SCell.
- the MT must know which serving cells/CCs it receives side control information from a specific serving cell/CC. To this end, the MT can receive information from the base station about the serving cells/CCs to which the side control information received for each serving cell/CC where the MT operates is applied. Alternatively, information about the serving cell/CC(s) to which side control information for the corresponding serving cell/CC is transmitted can be set for each serving cell/CC. For this purpose, for example, the following information can be set/provided.
- Alt 1 For each serving cell/CC where the MT operates, create a group of cell IDs (i.e., PCIDs) for the serving cells/CCs to which the side control information received from the serving cell/CC is applied. You can get it set. That is, information about serving cells/CCs that receive side control information from the serving cell of a specific MT can be set in the form of a cell ID.
- PCIDs cell IDs
- a cell ID (i.e., PCID) through which side control information for the corresponding serving cell/CC is transmitted can be set.
- different serving cells/CCs may be configured with the same cell ID (i.e., PCID). That is, information about the serving cell/CC from which the MT receives side control information for the RU to operate in a specific serving cell/CC may be set in the form of a cell ID.
- the MT may determine that side control information applied to the RU forwarding a signal from a cell with a specific cell ID is received from the corresponding serving cell/CC.
- the MT receives side control information and the cell ID to which the side control information is applied from the serving cell/CC, the MT can determine that the side control information is applied to the RU forwarding signals from the cell with the cell ID. there is.
- a group of 'serving cell index i.e., ServCellIndex
- ServCellIndex information about serving cells/CCs that receive side control information from the serving cell of a specific MT can be set in the form of a 'serving cell index'.
- a serving cell index (i.e., ServCellIndex) through which side control information for the corresponding serving cell/CC is transmitted can be set.
- different serving cells/CCs can receive the same ServCellIndex. That is, information about the serving cell/CC from which the MT receives side control information for the RU to operate in a specific serving cell/CC may be set in the form of a 'serving cell index'.
- the MT may determine that the side control information applied to the RU forwarding the signal on the carrier with the corresponding serving cell index is received from the corresponding serving cell/CC.
- the MT determines that the side control information is applied to the RU forwarding signals on the carrier with the serving cell index. can do.
- This configuration information can be set from the base station to the MT through RRC or MAC-CE.
- the MT does not receive the serving cell/CC information to which the side control information is applied, it can be assumed that the side control information received from the corresponding serving cell/CC is applied for RU operation in the same serving cell/CC. .
- the MT does not receive serving cell/CC information to which side control information is applied, it can be assumed that the side control information received from the serving cell/CC is applied for RU operation in the same sPCell (special cell). .
- RUs operate using different carrier resources within the NCR, and RU operations on each carrier can be performed independently using independent side control information.
- RUs can perform operations using frequency resources independent of each other within the intra carrier. At this time, RU operations on these independent frequency resources can be performed simultaneously. That is, NCR's RUs can operate simultaneously using frequency resources independent of each other within an intra carrier (for the same cell).
- the frequency resources on which the RU operates within NCR may be as follows.
- RUs can operate using different subband resources within the same carrier. At this time, different subbands in which the RU operates may be composed of overlapping or non-overlapping frequency resources.
- the subband resources on which each RU operates may be set by implementation or may be set by the base station independently of each other.
- RUs can operate using different BWP (bandwidth part) resources within the same carrier.
- BWP may mean a specific BWP among BWPs set for the MT.
- an independent BWP resource may be set to set the operating frequency resource of the RU.
- the carrier/serving cell on which the MT receives side control information for RU operation in a specific carrier/serving cell can be determined.
- the MT may receive side control information for RU operation in carrier/serving cell #n from carrier/serving cell #m.
- the MT sends side control information for RU operation on the K frequency resources to the carrier/serving cell #m. You can receive it.
- side control information for RU operation on independent frequency resources of a specific carrier/serving cell can be independently set to the MT for each frequency resource.
- the MT When the MT receives side control information for a plurality of RU operating carriers/frequency resources from a specific serving cell, information on which serving cell/CC among the plurality of RU operating carriers/frequency resources the side control information is for. You must be able to judge.
- an MT when an MT receives side control information for a plurality of RU operating carriers/frequency resources from a specific serving cell, the side control information for a plurality of RU operating carriers/frequency resources transmitted within one serving cell is We propose a method for multiplexing side control information and a method for an MT to distinguish side control information for multiple RU operation carrier/frequency resources.
- the MT may receive side control information for RU operation from the base station through a higher layer signal (eg, RRC message, MAC-CE, etc.).
- MAC-CE may contain side control information for the RU to operate on one carrier/operating frequency resource, or may contain side control information for the RU to operate on multiple carriers/operating frequency resources. .
- the MT may receive configuration information for RU operation from the base station through an RRC message, and may be instructed through MAC-CE whether to perform activation/deactivation of the configuration information (to receive can).
- the MT may additionally receive carrier/operating frequency resource information of the RU to which the configuration information is applied.
- the RU forwarding operation can be performed by applying the activated specific configuration information to the carrier/operating frequency resource.
- the RRC message may have a plurality of configuration information for RU operation.
- the MT can receive i) activation of the RRC message, ii) an index indicating specific configuration information among the N pieces of configuration information, and iii) resource information related to the operating frequency resource of the RU through the MAC-CE. there is. Then, the MT can control the RU to perform a forwarding operation applying the specific configuration information indicated by the index within the activated RRC message on the resource indicated by the resource information.
- side control information is provided through a combination of RRC message and MAC-CE.
- MAC-CE is exemplified as an upper layer signal, but is not limited thereto. That is, MAC-CE can be replaced with an RRC message. Alternatively, MAC-CE may be replaced with a combination of the above-described RRC message and MAC-CE. That is, the upper layer signal may include at least one of MAC-CE or RRC message.
- the following method can be applied so that the MT can determine the operating carrier/frequency resource of the RU to which MAC-CE containing side control information is applied.
- MAC-CE containing side control information may include information about the serving cell/CC to which the MAC-CE is applied.
- the MAC-CE containing the side control information contains information about the serving cells/CCs to which the MAC-CE is applied (serving cell/ A group of CCs) may be included.
- a MAC-CE containing side control information may include a plurality of side control information sets, and each side control information set may be information about a different serving cell/CC. Considering this, information on the serving cell/CC(s) to which the side control information set is applied may be included for each side control information set included in the MAC-CE.
- the operational carrier/frequency resources of the RU to which MAC-CE containing side control information is applied may be specifically as follows.
- Alt 1. Can mean cell ID (i.e., PCID).
- the MT may determine that the side control information is applied when the RU forwards a signal in a cell with the corresponding cell ID.
- Alt 2. Can mean ServCellIndex.
- the information element (IE) ServCellIndex is associated with a short ID used to uniquely identify a serving cell (eg, primary cell, PS cell or secondary cell) in a cell group. The value 0 is applied to primary cells, and the previously assigned SCellIndex is applied to secondary cells.
- the MT may determine that the side control information is applied to the RU forwarding a signal on the carrier with the serving cell index.
- Alt 3. May mean carrier index.
- the carrier index refers to an index for distinguishing the corresponding carriers/frequency resources when the MT can receive side control information for a plurality of RU operation carriers/frequency resources in a specific serving cell.
- a distinct carrier index may be set for a plurality of carriers/frequency resources that receive side control information from the serving cell.
- This carrier index information can be set from the base station to the MT through RRC, MAC-CE, etc.
- the MT determines that the side control information is applied when the RU forwards a signal on the carrier/frequency resource with the index. You can.
- the RU operates through a plurality of frequency resources within one serving cell/CC.
- the MT may receive side control information for RU operation on a plurality of frequency resources within a specific serving cell/CC.
- the following method can be applied so that the MT can determine the frequency resource to which MAC-CE containing side control information is applied within a specific serving cell/CC.
- MAC-CE containing side control information may include information about the serving cell/CC to which the MAC-CE is applied and/or information about RU operating frequency resources in the serving cell/CC.
- the MAC-CE containing the side control information includes serving cell/CC information to which the MAC-CE is applied and/or serving cell/ Information about RU operating frequency resources in CC (group of frequency resources) may be included.
- a plurality of side control information sets may be included in the MAC-CE containing side control information, and each side control information set may be information about different serving cells/CCs and different RU operating frequency resources.
- each side control information set included in the MAC-CE information about the serving cell/CC to which the side control information set is applied and the RU operating frequency resource(s) in the serving cell/CC may be included.
- information on RU operating frequency resources to which MAC-CE containing side control information is applied may be specifically as follows.
- Alt 1. May mean a sub-band index.
- the frequency resources constituting the serving cell/carrier may be composed of a plurality of subbands.
- side control information for the RU to operate in the corresponding subband resource can be indicated.
- Alt 2. Can refer to the BWP index.
- the RU can operate through one or multiple BWPs, by informing the BWP index, side control information for the RU to operate on the corresponding BWP resource can be indicated.
- Alt 3. May mean RU index.
- the index of the RU can be set, and the RU operating frequency resource corresponding to the RU index can be set.
- the RU can indicate side control information for operating on the related frequency resource.
- Figure 16 is an example of NCR operation when side control information is transmitted through a higher layer signal.
- the MT i.e., NCR-MT transmits a higher layer signal (e.g., MAC-CE, RRC message, or combination of RRC message and MAC-CE) through serving cell #m (frequency band #m). can receive.
- a higher layer signal e.g., MAC-CE, RRC message, or combination of RRC message and MAC-CE
- the MT may receive the RRC message first from serving cell #m and receive the MAC-CE later.
- the higher layer signal may include side control information.
- the higher layer signal may include first side control information applied to serving cell #k (frequency band #k) and second side control information applied to serving cell #n (frequency band #n).
- RU performs forwarding operation #1 through the first resource of serving cell #k indicated by the higher layer signal (specifically, first side control information in the higher layer signal), and Forwarding operation #2 can be performed through the second resource of serving cell #n indicated by a higher layer signal (specifically, second side control information in the higher layer signal).
- n may i) be the same values, ii) some of them may be the same and others may be different values, or iii) they may all be different values.
- the higher layer signal may include information about the cell/CC to which the higher layer signal will be applied.
- NCR-Fwd can perform a forwarding operation according to the first and second side control information in the serving cell indicated by the information.
- each of the first side control information and the second side control information may include information about the cell/CC to which the corresponding side control information will be applied.
- the first side control information may include information indicating serving cell #k
- the second side control information may include information indicating serving cell #n.
- Each of the first and second side control information includes, for example, i) beamforming information, which is information about the direction of at least one of the transmission beam and the reception beam of the NCR-Fwd, ii) the transmission and reception boundary of the NCR Timing information for matching, iii) information on TDD (time division duplex) settings, iv) ON-OFF information of the NCR-Fwd, v) power control information, and vi) information indicating forwarding resources.
- beamforming information which is information about the direction of at least one of the transmission beam and the reception beam of the NCR-Fwd
- the transmission and reception boundary of the NCR Timing information for matching iii) information on TDD (time division duplex) settings
- iv) ON-OFF information of the NCR-Fwd v) power control information
- information indicating the serving cell clearly indicates this.
- Figure 17 is another example of NCR operation when side control information is transmitted through a higher layer signal.
- the MT i.e., NCR-MT transmits a higher layer signal (e.g., MAC-CE, RRC message, or combination of RRC message and MAC-CE) through serving cell #m (frequency band #m).
- a higher layer signal e.g., MAC-CE, RRC message, or combination of RRC message and MAC-CE
- the higher layer signal may include side control information.
- the higher layer signal may include application resource information for the cell/CC to which the higher layer signal will be applied (eg, information indicating serving cell #n).
- NCR-Fwd can perform a forwarding operation according to the first and second side control information in serving cell #n indicated by the application resource information.
- the same forwarding operation can be performed simultaneously using different frequency resources (first and second resources) of serving cell #n according to the first and second side control information.
- the m and n may be the same value or may be different values.
- the forwarding operation of NCR-Fwd may be simultaneously performed through resources that overlap in the time domain and do not overlap in the frequency domain.
- the forwarding operation of NCR-Fwd may be performed through resources that do not overlap in the time domain but overlap in the frequency domain.
- Resources on which the NCR-Fwd forwarding operation is performed may be in different serving cells (carrier/CC) or in the same serving cell.
- the MT can receive side control information for RU operation from the base station through DCI.
- the DCI containing the side control information may contain side control information for the RU operating carrier/frequency resources or may contain side control information for a plurality of RU operating carriers/frequency resources.
- DCI_sci DCI containing side control information
- side control information for RU operation on different carrier/frequency resources may be transmitted through different DCI_sci.
- one of the following methods or a plurality of methods may be applied together.
- DCI_sci for different serving cells/CCs can be distinguished by transmitting DCI_sci containing side control information for different carriers/frequency resources through different search spaces.
- the MT can receive search space information (e.g., search space index) from the base station in which DCI_sci containing side control information for the operating carrier/frequency resource of the RU is transmitted for each operating carrier/frequency resource of the RU.
- search space information e.g., search space index
- the MT can be configured to transmit DCI_sci containing side control information about which RU's operating carrier/frequency resource(s) each search space transmits. Through this, it is possible to know in which search space the side control information for the operating carrier/frequency resource(s) of which RU is transmitted.
- Figure 18 shows an example of NCR operation when side control information is transmitted through DCI.
- NCR-MT can receive DCI_sci#1 by monitoring search space #1 of serving cell #0, and receive DCI_sci#2 by monitoring search space #2.
- Search spaces #1 and 2 are separate search spaces.
- NCR may provide/receive information in advance from the network indicating that DCI_sci received in search space #1 is applied to serving cell #1, and DCI_sci received in search space #2 is applied to serving cell #2.
- NCR performs forwarding operation #1 in serving cell #1 according to DCI_sci #1 received in search space #1, and performs forwarding operation #2 in serving cell #2 according to DCI_sci #2 received in search space #2. do.
- CRC scrambling of DCI_sci may be scrambled based on an RNTI called SCI_RNTI.
- SCI_RNTI may be set differently for the operating carrier/frequency resources of different RUs.
- the MT can distinguish DCI_sci for the operating carrier/frequency resources of different RUs.
- the MT can receive an RNTI value (SCI_RNTI value) for receiving DCI_sci for the operating carrier/frequency resource of the RU from the base station for each operating carrier/frequency resource of the RU.
- SCI_RNTI value an RNTI value for receiving DCI_sci for the operating carrier/frequency resource of the RU from the base station for each operating carrier/frequency resource of the RU.
- DCI_sci By including the operating carrier/frequency resource information of the RU to which the corresponding DCI is applied in the DCI_sci, DCI_sci for the operating carrier/frequency resources of different RUs can be distinguished. To this end, in a specific field constituting DCI_sci, the DCI_sci may indicate the operating carrier/frequency resource information of the RU to which the information applies.
- the operating carrier/frequency resource information of this RU may be specifically as follows.
- the MT may determine that the side control information is applied when the RU forwards a signal in a cell with the corresponding cell ID.
- Alt 2. Can mean ServCellIndex.
- the information element ServCellIndex is associated with a short ID used to uniquely identify a serving cell (e.g. primary cell, PS cell or secondary cell) in a cell group.
- the value 0 is applied to primary cells, and the previously assigned SCellIndex is applied to secondary cells.
- the MT may determine that the side control information is applied when the RU forwards a signal on a carrier with the serving cell index.
- Alt 3. May mean carrier index.
- the carrier index refers to an index for distinguishing the serving cells/CCs when the MT can receive side control information for a plurality of serving cells/CCs in a specific serving cell. That is, for a specific serving cell, a distinct carrier index may be set for a plurality of serving cells/CCs that receive side control information from the serving cell. This carrier index information can be set from the base station to the MT through RRC, MAC-CE, etc.
- the MT determines the index for the carrier/frequency resource of the RU to which side control information is applied, the MT determines that the side control information is applied when the RU forwards a signal on the carrier/frequency resource with the index. can do.
- Figure 19 shows another example of NCR operation when side control information is transmitted through DCI.
- NCR-MT can receive DCI_sci#1 and DCI_sci#2 by monitoring the search space of serving cell #0.
- DCI_sci#1 and DCI_sci#2 may each include information that explicitly/implicitly indicates the serving cell (carrier/CC) to which DCI_sci is applied.
- DCI_sci#1 may include information indicating serving cell #0
- DCI_sci#2 may contain information indicating serving cell #2.
- NCR performs forwarding operation #1 according to DCI_sci #1 in serving cell #0, and forwarding operation #2 according to DCI_sci #2 in serving cell #2.
- side control information for different RU operating carriers/frequency resources may be transmitted through the same DCI.
- This method can be additionally applied to the above ‘method of transmitting side control information for different RU operating carriers/frequency resources through different DCI_sci’.
- this method can be applied as an alternative to ‘a method of transmitting side control information for different RU operating carriers/frequency resources through different DCI_sci’.
- side control information for different RU operating carriers/frequency resources may be transmitted through different fields in DCI_sci.
- the MT in order to determine the field location for receiving side control information within DCI_sci for each RU operating carrier/frequency resource, the MT can receive location information of the field within DCI_sci for each RU operating carrier/frequency resource from the base station. there is.
- the location information may specifically be as follows.
- the position information of the start bit of the field for receiving side control information can be set. This information can indicate from which bit from the MSB (or LSB) in DCI_sci to configure the field for receiving side control information.
- the bit size of the field can be fixed to a specific value or the MT can be additionally set by the base station.
- Method 1-2 For each field, information about the RU operation carrier/frequency resource to which the field is applied may be indicated. For example, among the bits constituting each field, some A MSB bits (or A LSB bits) may indicate information about the RU operation carrier/frequency resource to which the field is applied.
- Information on the RU operation carrier/frequency resources may be specifically as follows.
- Alt 1. Can mean cell ID (i.e. PCID).
- the fact that the RU operates on a carrier/frequency resource corresponding to a specific cell ID means that the RU operates by forwarding signals from the cell within the frequency resources of the cell using the cell ID.
- Alt 2. May refer to the serving cell index (ServCellIndex) of the MT.
- the information element ServCellIndex is associated with a short ID used to uniquely identify a serving cell (e.g. primary cell, PS cell or secondary cell) in a cell group.
- the value 0 is applied to primary cells, and the previously assigned SCellIndex is applied to secondary cells.
- saying that the RU operates on a carrier/frequency resource corresponding to the serving cell index of a specific MT means that the RU forwards signals from the serving cell within the frequency resource on which the serving cell of the MT with the serving cell index operates. This means that it operates.
- Alt 3. May mean carrier index.
- the carrier index refers to an index for distinguishing the serving cells/CCs when the MT can receive side control information for a plurality of serving cells/CCs in a specific serving cell. That is, for a specific serving cell, a distinct carrier index may be set for a plurality of serving cells/CCs that receive side control information from the serving cell. This carrier index information can be set from the base station to the MT through RRC, MAC-CE, etc.
- the fact that the RU operates on a carrier/frequency resource corresponding to the carrier index means that the RU operates by forwarding a signal within the frequency resource of the RU's carrier with the corresponding carrier index.
- Side control information for different RU operating carriers/frequency resources may be transmitted through the same field in DCI_sci.
- Method 2-1 When side control information is received in the same field for different RU operating carriers/frequency resources, the same side control information can be applied to the corresponding RU operating carriers/frequency resources.
- Method 2-2 independent side control information may be indicated for each RU operation carrier/frequency resource.
- the value indicated in the field may be linked to side control information applied for each RU operating carrier/frequency resource for a plurality of RU operating carriers/frequency resources.
- the MT receives a plurality of sets of ‘side control information applied to each RU operating carrier/frequency resource for a plurality of RU operating carriers/frequency resources’ from the base station in advance. At this time, a corresponding index is set for each set. Afterwards, when the MT receives an indication of the applied index through DCI_sci from the base station, it determines that the side control information for each RU operating carrier/frequency resource corresponding to the index is applied.
- a DCI that receives side control information for RU operation on a specific resource and side control information within the DCI This explains how to determine the DCI field being transmitted.
- the MT receives DCI (DCI_sci) where side control information is transmitted to receive side control information applied to the RU from the base station.
- DCI_sci DCI
- the DCI_sci may be MT-specific and transmitted by CRC scrambling with the MT's C-RNTI. In this case, DCI_sci may only include side control information for the RU operating in the NCR where the corresponding MT exists.
- the DCI_sci may be CRC-scrambled and transmitted as a new RNTI (eg, SCI-RNTI) specific to the MT group.
- a new RNTI eg, SCI-RNTI
- different MTs can be configured with the same SCI-RNTI.
- DCI_sci may include side control information for MTs using the same SCI-RNTI and for RUs operating in the NCR where the corresponding MT exists.
- the MT determines the DCI field in which side control information for RU operation on a specific RU resource (i.e., the carrier resource on which the RU operates and/or the frequency resource within the carrier) is transmitted within the DCI_sci received from the base station as follows. can do.
- All DCI fields in DCI_sci can be used to indicate side control information for the RU to operate on a specific resource.
- side control information for different RU resources for a specific RU may be transmitted through different DCI_sci.
- the corresponding DCI field(s) may be determined according to the MT.
- positionInDCI indicates the position of the start bit within the DCI where the DCI field(s) to be received by the corresponding MT are located.
- the MT may determine that one or multiple DCI fields consecutive from the position indicated by positionInDCI are the DCI field(s) it should receive.
- the MT may receive side control information according to the multiple RU operating resources through the corresponding DCI field(s). That is, side control information for a plurality of RU operation resources may be transmitted through the same DCI field(s).
- the corresponding DCI field(s) may be determined for each serving cell of the MT.
- the DCI field(s) in DCI_sci received by the MT may be determined depending on the serving cell of the MT.
- positionInDCI can be set for each serving cell of the MT.
- the MT may determine one or multiple DCI fields consecutive from the position indicated by positionInDCI as DCI field(s) for the corresponding serving cell.
- the DCI field determined in this way carries side control information for the RU forwarding signals from a specific serving cell. That is, the MT can determine the DCI field(s) to be received within DCI_sci specifically for the serving cell, and side control information for the RU operating in the serving cell is transmitted in the corresponding DCI field. That is, side control information for the RU to operate within the frequency resources constituting the serving cell of the corresponding MT is transmitted.
- the MT provides side control information according to the plurality of RU operating resources through the corresponding DCI field(s). can receive. That is, side control information for multiple RU operation resources in the same serving cell may be transmitted through the same DCI field(s).
- Method 4 Method in which the corresponding DCI field(s) are determined for each operating carrier of the RU.
- the DCI field(s) in DCI_sci received by the MT may be determined depending on the RU's operating carrier/frequency resources.
- the MT can receive positionInDCI set for each operating carrier/frequency resource of the RU.
- the MT may determine one or multiple DCI fields consecutive from the position indicated by positionInDCI as DCI field(s) containing side control information for RU operation in the corresponding carrier/frequency resource.
- this carrier/frequency resource information may be specifically as follows.
- Alt 1. Can mean cell ID (i.e. PCID).
- the fact that the RU operates on a carrier/frequency resource corresponding to a specific cell ID means that the RU operates by forwarding signals from the cell within the frequency resources of the cell using the cell ID.
- Alt 2. May refer to the MT's serving cell index (e.g., ServCellIndex).
- the information element ServCellIndex is associated with a short ID used to uniquely identify a serving cell (e.g. primary cell, PS cell or secondary cell) in a cell group.
- the value 0 is applied to primary cells, and the previously assigned SCellIndex is applied to secondary cells.
- saying that the RU operates on a carrier/frequency resource corresponding to the serving cell index of a specific MT means that the RU forwards signals from the serving cell within the frequency resource on which the serving cell of the MT with the serving cell index operates. This means that it operates.
- Alt 3. May mean carrier index.
- the carrier index means an index for distinguishing the serving cells/CCs when the MT can receive side control information for RU operation in a plurality of serving cells/CCs in a specific serving cell. That is, for a specific serving cell, a distinct carrier index may be set for a plurality of serving cells/CCs that receive side control information from the serving cell. This carrier index information can be set from the base station to the MT through RRC, MAC-CE, etc.
- the fact that the RU operates on a carrier/frequency resource corresponding to the carrier index means that the RU operates by forwarding a signal within the frequency resource of the RU's carrier with the corresponding carrier index.
- the MT operates on multiple RU operating resources within the serving cell/carrier through the corresponding DCI field(s).
- Side control information can be received. That is, side control information for multiple RU operation resources in the same serving cell may be transmitted through the same DCI field(s).
- Method 5 Method in which the corresponding DCI field(s) are determined for each operation resource of the RU.
- the DCI field(s) in DCI_sci received by the MT may be determined according to the operating frequency resources of the RU.
- the MT can receive positionInDCI settings for each operating carrier/serving cell and operating frequency resource of the RU.
- the MT may determine one or multiple DCI fields consecutive from the position indicated by positionInDCI as DCI field(s) containing side control information for RU operation in the corresponding operating carrier/serving cell and operating frequency resource.
- the MT can receive information indicating the location of the carrier/serving cell and information indicating the location of the frequency resource in the carrier/serving cell, as well as positionInDCI information related thereto, from the base station.
- the MT can receive side control information applied when the RU operates at the corresponding frequency resource location within the corresponding carrier/serving cell through one or multiple DCI fields from the position indicated by the corresponding positionInDCI.
- information indicating the location of this serving cell/CC may be specifically as follows.
- Alt 1. Can mean cell ID (i.e. PCID).
- Alt 2. Can mean ServCellIndex.
- the information element ServCellIndex is associated with a short ID used to uniquely identify a serving cell (e.g. primary cell, PS cell or secondary cell) in a cell group.
- the value 0 is applied to primary cells, and the previously assigned SCellIndex is applied to secondary cells.
- Alt 3. May mean carrier index.
- the carrier index means an index for distinguishing the serving cells/CCs when the MT can receive side control information for RU operation in a plurality of serving cells/CCs in a specific serving cell. That is, for a specific serving cell, a distinct carrier index may be set for a plurality of serving cells/CCs that receive side control information from the serving cell. This carrier index information can be set from the base station to the MT through RRC, MAC-CE, etc.
- information indicating the location of the corresponding frequency resource within the carrier/serving cell may specifically be as follows.
- Alt 1. May mean subband index.
- the frequency resources constituting the serving cell/carrier may be composed of a plurality of subbands.
- side control information for the RU to operate in the corresponding subband resource can be indicated.
- Alt 2. Can refer to the BWP index.
- the RU can operate through one or multiple BWPs, by informing the BWP index, side control information for the RU to operate on the corresponding BWP resource can be indicated.
- Alt 3. May mean RU index.
- the index of the RU can be set, and the RU operating frequency resource corresponding to the RU index can be set.
- the RU can indicate side control information for operating on the related frequency resource.
- Figure 20 illustrates a method of operating NCR including NCR-MT and NCR-Fwd in a wireless communication system.
- NCR performs an initial connection procedure with the network through NCR-MT (S201). Refer to FIG. 10 for the initial connection procedure.
- NCR receives first side control information and second side control information from the network through NCR-MT (S202).
- the first and second side control information may be provided through MAC-CE or through DCI (DCI_sci).
- first side control information and second side control information may be included in one MAC-CE.
- the MAC CE is the cell to which the first side control information and the second side control information will be applied (i.e., the first forwarding operation according to the first side control information and the second forwarding operation according to the second side control information will be performed) It may further include information indicating /carrier/CC.
- the first side control information further includes information indicating a cell/carrier/CC on which the first forwarding operation will be performed
- the second side control information includes a cell on which the second forwarding operation will be performed. It may further include information indicating /carrier/CC.
- each of the first side control information and the second side control information may be received through DCI. That is, the first side control information may be received through the first DCI, and the second side control information may be received through the second DCI.
- the first DCI and the second DCI may be received in the same search space.
- the first DCI further explicitly/implicitly includes information indicating the cell or carrier on which the first forwarding operation will be performed
- the second DCI indicates the cell or carrier on which the second forwarding operation will be performed. Additional indicating information may be included explicitly/implicitly. For example, if the CRC scrambling RNTI of DCI is classified according to the cell/carrier/CC to which the DCI is applied, it can be expressed as implicitly informing the cell/carrier/CC on which the forwarding operation will be performed by the CRC scrambling RNTI.
- the first DCI is received in a first search space
- the second DCI is received in a second search space
- the first search space and the second search space may be separate search spaces.
- the cell/carrier/CC to which the side control information is applied can be identified.
- the mapping relationship between the search space and the cell/carrier/CC to which DCI will be applied can be set in advance.
- the first side control information and the second side control information may be received through different fields of the same DCI.
- the NCR may receive in advance information indicating the location of the first side control information and the location of the second side control information within the same DCI.
- NCR performs a first forwarding operation through NCR-Fwd in the first frequency band based on the first side control information (S203).
- NCR performs a second forwarding operation through NCR-Fwd in the second frequency band based on the second side control information (S204).
- the NCR provides various information indicating the mapping relationship between a cell receiving each of the first side control information and the second side control information and a cell to which each of the first side control information and the second side control information is applied. It can be provided in this way.
- the NCR can receive without ambiguity side control information that can perform independent forwarding operations for each cell/carrier/CC performing forwarding. As a result, from an NCR perspective, unnecessary power consumption can be reduced and interference to surrounding terminals/base stations can also be reduced.
- a forwarding operation can be effectively performed even when a cell receiving side control information and a cell applying the side control information are different in a multi-carrier environment.
- NCR receives independent side control information for each frequency band/carrier/resource performing forwarding, so it can perform different forwarding operations for each frequency band/carrier/resource, thereby reducing unnecessary power consumption. , interference to nearby terminals/base stations can also be reduced.
- Figure 21 illustrates a method of operating a base station in a wireless communication system.
- the base station performs an initial access procedure with NCR including NCR-MT and NCR-Fwd (S211). Refer to FIG. 10 for the initial connection procedure.
- the base station transmits first side control information and second side control information to NCR (S212).
- the first and second side control information may be transmitted through MAC-CE or through DCI (DCI_sci).
- the base station receives a signal from the NCR or transmits a signal to the NCR in at least one of the first frequency band and the second frequency band based on the first side control information and the second side control information (S213).
- the first side control information and the second side control information are independent side control information.
- 22 illustrates a wireless device that can be applied herein.
- 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).
- various wireless access technologies eg, LTE, NR.
- 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 processor 102 may be included in a network-controlled repeater (NCR), including a mobile termination (MT) and NCR-forwarding (Fwd).
- NCR network-controlled repeater
- the processor 102 performs an initial connection procedure with the network through the NCR-MT, receives first side control information and second side control information from the network through the NCR-MT, and receives the first side control information. Based on this, a first forwarding operation is performed in a first frequency band through the NCR-Fwd, and a second forwarding operation is performed in a second frequency band based on the second side control information through the NCR-Fwd. Perform.
- 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.
- Processor 202 may be included in the base station.
- the processor 202 performs an initial connection procedure with the NCR, including network-controlled repeater (NCR)-mobile termination (MT) and NCR-forwarding (Fwd), and provides first side control information and second side control to the NCR.
- Information is transmitted, and a signal is received from the NCR or a signal is transmitted to the NCR in at least one of the first frequency band and the second frequency band based on the first side control information and the second side control information.
- the first side control information and the second side control information are independent side control information.
- 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
- processors 102, 202 may be implemented with at least one computer readable medium (CRM) containing instructions based on execution by at least one processor. It may be possible.
- CRM computer readable medium
- At least one computer readable medium containing instructions based on execution by at least one processor performs an initial connection procedure with the network. , receive first side control information and second side control information from the network, perform a first forwarding operation in a first frequency band based on the first side control information, and perform the second side control information Based on this, a second forwarding operation is performed in the second frequency band.
- CCM computer readable medium
- 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 an example of a signal processing module structure.
- signal processing may be performed in the processors 102 and 202 of FIG. 22.
- the transmission device e.g., processor, processor and memory, or processor and transceiver
- the transmission device includes a scrambler 301, a modulator 302, a layer mapper 303, an antenna port mapper 304, It may include a resource block mapper 305 and a signal generator 306.
- a transmitting device may transmit one or more codewords. Coded bits within each codeword are scrambled by the scrambler 301 and transmitted on a physical channel.
- a codeword may be referred to as a data string and may be equivalent to a transport block, which is a data block provided by the MAC layer.
- the scrambled bits are modulated into complex-valued modulation symbols by the modulator 302.
- the modulator 302 can modulate the scrambled bits according to a modulation method and arrange them into complex modulation symbols representing positions on the signal constellation. There are no restrictions on the modulation scheme, and m-PSK (m-Phase Shift Keying) or m-QAM (m-Quadrature Amplitude Modulation) may be used to modulate the encoded data.
- the modulator may be referred to as a modulation mapper.
- the complex modulation symbol may be mapped to one or more transport layers by the layer mapper 303.
- Complex modulation symbols on each layer may be mapped by the antenna port mapper 304 for transmission on the antenna port.
- the resource block mapper 305 may map the complex modulation symbol for each antenna port to an appropriate resource element in a virtual resource block allocated for transmission.
- the resource block mapper can map the virtual resource block to a physical resource block according to an appropriate mapping scheme.
- the resource block mapper 305 can allocate complex modulation symbols for each antenna port to appropriate subcarriers and multiplex them according to users.
- the signal generator 306 modulates the complex modulation symbol for each antenna port, that is, an antenna-specific symbol, using a specific modulation method, for example, OFDM (Orthogonal Frequency Division Multiplexing), to form a complex-valued time domain.
- OFDM symbol signals can be generated.
- the signal generator may perform Inverse Fast Fourier Transform (IFFT) on the antenna-specific symbol, and a Cyclic Prefix (CP) may be inserted into the time domain symbol on which the IFFT was performed.
- OFDM symbols are transmitted to the receiving device through each transmitting antenna through digital-to-analog conversion and frequency up-conversion.
- the signal generator may include an IFFT module and CP inserter, a digital-to-analog converter (DAC), a frequency uplink converter, etc.
- DAC digital-to-analog converter
- Figure 24 shows another example of the signal processing module structure within the transmission device.
- signal processing may be performed in a processor of the terminal/base station, such as the processors 102 and 202 of FIG. 22.
- the transmission device within the terminal or base station includes a scrambler 401, a modulator 402, a layer mapper 403, a precoder 404, and a resource. It may include a block mapper 405 and a signal generator 406.
- the transmission device can scramble the coded bits within the codeword by the scrambler 401 and then transmit them through a physical channel.
- the scrambled bits are modulated into complex modulation symbols by the modulator 402.
- the modulator may modulate the scrambled bits according to a predetermined modulation method and arrange them into complex modulation symbols representing positions on the signal constellation.
- a predetermined modulation method There are no restrictions on the modulation scheme, such as pi/2-BPSK (pi/2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), or m-QAM (m-Quadrature Amplitude Modulation). It can be used to modulate the encoded data.
- the complex modulation symbol may be mapped to one or more transport layers by the layer mapper 403.
- Complex modulation symbols on each layer may be precoded by a precoder 404 for transmission on the antenna port.
- the precoder may perform precoding after performing transform precoding on the complex modulation symbol.
- the precoder may perform precoding without performing transform precoding.
- the precoder 404 may process the complex modulation symbols in a MIMO method according to multiple transmission antennas, output antenna-specific symbols, and distribute the antenna-specific symbols to the corresponding resource block mapper 405.
- the output z of the precoder 404 can be obtained by multiplying the output y of the layer mapper 403 with the precoding matrix W of N ⁇ M.
- N is the number of antenna ports and M is the number of layers.
- the resource block mapper 405 maps demodulation modulation symbols for each antenna port to appropriate resource elements within the virtual resource block allocated for transmission.
- the resource block mapper 405 can assign complex modulation symbols to appropriate subcarriers and multiplex them according to users.
- the signal generator 406 may generate a complex-valued time domain OFDM (Orthogonal Frequency Division Multiplexing) symbol signal by modulating the complex modulation symbol using a specific modulation method, such as an OFDM method.
- the signal generator 406 may perform Inverse Fast Fourier Transform (IFFT) on an antenna-specific symbol, and a Cyclic Prefix (CP) may be inserted into the time domain symbol on which the IFFT was performed.
- IFFT Inverse Fast Fourier Transform
- CP Cyclic Prefix
- the OFDM symbol goes through digital-to-analog conversion, frequency up-conversion, etc., and is transmitted to the receiving device through each transmitting antenna.
- the signal generator 406 may include an IFFT module, a CP inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc.
- DAC Digital-to-Analog Converter
- the signal processing process of the receiving device may be configured as the reverse of the signal processing process of the transmitter.
- the processor of the receiving device performs decoding and demodulation on wireless signals received from the outside through the antenna port(s) of the transceiver.
- the receiving device may include a plurality of multiple receiving antennas, and each signal received through the receiving antenna is restored to a baseband signal and then goes through multiplexing and MIMO demodulation to restore the data stream that the transmitting device originally intended to transmit.
- the receiving device 1820 may include a signal restorer for restoring the received signal to a baseband signal, a multiplexer for combining and multiplexing the received and processed signals, and a channel demodulator for demodulating the multiplexed signal sequence into a corresponding codeword.
- the signal restorer, multiplexer, and channel demodulator may be composed of one integrated module or each independent module that performs these functions. More specifically, the signal restorer includes an analog-to-digital converter (ADC) that converts an analog signal into a digital signal, a CP remover that removes CP from the digital signal, and an FFT (fast Fourier transform) on the signal from which CP has been removed. It may include an FFT module that applies and outputs a frequency domain symbol, and a resource element demapper/equalizer that restores the frequency domain symbol to an antenna-specific symbol. The antenna-specific symbol is restored to the transmission layer by a multiplexer, and the transmission layer is restored to the codeword that the transmitter wanted to transmit by a channel demodulator.
- ADC analog-to-digital converter
- CP remover that removes CP from the digital signal
- FFT fast Fourier transform
- Figure 25 shows an example of a wireless communication device according to an implementation example of 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. 22 .
- 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 204 of FIG. 22 .
- 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. 33 may be the transceiver (106, 206) of FIG. 30.
- 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
- 26 shows another example of a wireless device.
- 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 The difference between the example of the wireless device described in FIG. 22 and the example of the wireless device in FIG. 26 is that in FIG. 22, the processors 102 and 202 and the memories 104 and 204 are separated, but in the example of FIG. 26, the processor ( The point is that memories 104 and 204 are included in 102 and 202). In other words, the processor and memory may form one chipset.
- FIG 27 shows another example of a wireless device applied to this specification.
- Wireless devices can be implemented in various forms depending on usage-examples/services.
- wireless devices 100 and 200 may correspond to the wireless devices of FIG. 22 and are comprised of various elements, components, units/units, and/or modules. It can be configured.
- the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130, and an additional element 140.
- the communication unit may include communication circuitry 112 and transceiver(s) 114.
- communications circuitry 112 may include one or more processors 102 and 202 and/or one or more memories 104 and 204.
- transceiver(s) 114 may include one or more transceivers 106, 206 and/or one or more antennas 108, 208 of FIG. 22.
- the control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls overall operations of the wireless device. For example, the control unit 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130. In addition, the control unit 120 transmits the information stored in the memory unit 130 to the outside (e.g., another communication device) through the communication unit 110 through a wireless/wired interface, or to the outside (e.g., to another communication device) through the communication unit 110. Information received through a wireless/wired interface from another communication device may be stored in the memory unit 130.
- the outside e.g., another communication device
- Information received through a wireless/wired interface from another communication device may be stored in the memory unit 130.
- the additional element 140 may be configured in various ways depending on the type of wireless device.
- the additional element 140 may include at least one of a power unit/battery, an input/output unit (I/O unit), a driving unit, and a computing unit.
- wireless devices include robots (FIG. 28, 100a), vehicles (FIG. 28, 100b-1, 100b-2), XR devices (FIG. 28, 100c), portable devices (FIG. 28, 100d), and home appliances. (FIG. 28, 100e), IoT device (FIG.
- digital broadcasting terminal digital broadcasting terminal
- hologram device public safety device
- MTC device medical device
- fintech device or financial device
- security device climate/environment device
- It can be implemented in the form of an AI server/device (FIG. 28, 400), a base station (FIG. 28, 200), a network node, etc.
- Wireless devices can be mobile or used in fixed locations depending on the usage/service.
- various elements, components, units/parts, and/or modules within the wireless devices 100 and 200 may be entirely interconnected through a wired interface, or at least some of them may be wirelessly connected through the communication unit 110.
- the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (e.g., 130 and 140) are connected through the communication unit 110.
- the control unit 120 and the first unit e.g., 130 and 140
- each element, component, unit/part, and/or module within the wireless devices 100 and 200 may further include one or more elements.
- the control unit 120 may be comprised of one or more processor sets.
- control unit 120 may be comprised of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing processor, and a memory control processor.
- memory unit 130 includes random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.
- Figure 28 illustrates the communication system 1 applied herein.
- the communication system 1 applied herein 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)) and may be referred to as a communication/wireless/5G device.
- 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, or 5G (eg, NR) 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.
- NR supports multiple numerologies (or subcarrier spacing (SCS)) to support various 5G 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 values of the frequency range may be changed.
- the frequency ranges of the two types (FR1, FR2) may be as shown in Table 6 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 410 MHz to 7125 MHz as shown in Table 7 below. That is, FR1 may include a frequency band of 6GHz (or 5850, 5900, 5925 MHz, etc.). For example, 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).
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Abstract
Description
Claims (30)
- 무선 통신 시스템에서, NCR(network-controlled repeater)-MT(mobile termination) 및 NCR-Fwd(Forwarding)을 포함하는 NCR의 동작 방법에 있어서,상기 NCR-MT를 통해 네트워크와 초기 접속 절차를 수행하고,상기 NCR-MT를 통해 상기 네트워크로부터 제1 사이드 제어 정보 및 제2 사이드 제어 정보를 수신하고,상기 제1 사이드 제어 정보에 기반하여 제1 주파수 대역에서 제1 포워딩(forwarding) 동작을 상기 NCR-Fwd를 통해 수행하고, 및상기 제2 사이드 제어 정보에 기반하여 제2 주파수 대역에서 제2 포워딩 동작을 상기 NCR-Fwd를 통해 수행하는 것을 특징으로 하는 방법.
- 제1 항에 있어서,상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보는 하나의 상위 계층 메시지 내에 포함되는 것을 특징으로 하는 방법.
- 제2 항에 있어서,상기 상위 계층 메시지는 상기 제1 포워딩 동작 및 상기 제2 포워딩 동작이 수행될 셀(cell) 또는 반송파를 지시하는 정보를 더 포함하는 것을 특징으로 하는 방법.
- 제2 항에 있어서,상기 제1 사이드 제어 정보는 상기 제1 포워딩 동작이 수행될 셀 또는 반송파를 지시하는 정보를 더 포함하고,상기 제2 사이드 제어 정보는 상기 제2 포워딩 동작이 수행될 셀 또는 반송파를 지시하는 정보를 더 포함하는 것을 특징으로 하는 방법.
- 제2 항에 있어서,상기 상위 계층 메시지는 MAC(media access control)-CE(control element) 또는 RRC(radio resource control) 메시지 중 적어도 하나를 포함하는 것을 특징으로 하는 방법.
- 제1 항에 있어서,상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보 각각은 하향링크 제어 정보(downlink control information: DCI)를 통해 수신되는 것을 특징으로 하는 방법.
- 제6 항에 있어서,상기 제1 사이드 제어 정보는 제1 DCI를 통해 수신되고, 상기 제2 사이드 제어 정보는 제2 DCI를 통해 수신되는 것을 특징으로 하는 방법.
- 제7 항에 있어서,상기 제1 DCI 및 상기 제2 DCI는 서로 동일한 검색 공간(search space)에서 수신되는 것을 특징으로 하는 방법.
- 제7 항에 있어서,상기 제1 DCI는 제1 검색 공간에서 수신되고, 상기 제2 DCI는 제2 검색 공간에서 수신되며, 상기 제1 검색 공간과 상기 제2 검색 공간은 서로 구분되는 검색 공간들인 것을 특징으로 하는 방법.
- 제7 항에 있어서,상기 제1 DCI는 상기 제1 포워딩 동작이 수행될 셀 또는 반송파를 지시하는 정보를 더 포함하고,상기 제2 DCI는 상기 제2 포워딩 동작이 수행될 셀 또는 반송파를 지시하는 정보를 더 포함하는 것을 특징으로 하는 방법.
- 제1 항에 있어서, 상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보는 동일한 하향링크 제어 정보(downlink control information: DCI)의 서로 다른 필드들을 통해 수신되는 것을 특징으로 하는 방법.
- 제11 항에 있어서, 상기 동일한 DCI 내에서의 상기 제1 사이드 제어 정보의 위치 및 상기 제2 사이드 제어 정보의 위치를 알려주는 정보를 더 수신하는 것을 특징으로 하는 방법.
- 제1 항에 있어서, 상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보 각각을 수신하는 셀과 상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보 각각이 적용되는 셀 간의 맵핑 관계를 알려주는 정보를 더 수신하는 것을 특징으로 하는 방법.
- NCR(network-controlled repeater)-MT(mobile termination) 및 NCR-Fwd(Forwarding)을 포함하는 NCR은,적어도 하나의 트랜시버;적어도 하나의 메모리; 및상기 적어도 하나의 메모리 및 상기 적어도 하나의 트랜시버와 동작 가능하게 결합된 적어도 하나의 프로세서를 포함하되, 상기 적어도 하나의 프로세서는,상기 NCR-MT의 트랜시버를 통해 네트워크와 초기 접속 절차를 수행하고,상기 NCR-MT의 트랜시버를 통해 상기 네트워크로부터 제1 사이드 제어 정보 및 제2 사이드 제어 정보를 수신하고,상기 제1 사이드 제어 정보에 기반하여 제1 주파수 대역에서 제1 포워딩(forwarding) 동작을 상기 NCR-Fwd의 트랜시버를 통해 수행하고, 및상기 제2 사이드 제어 정보에 기반하여 제2 주파수 대역에서 제2 포워딩 동작을 상기 NCR-Fwd의 트랜시버를 통해 수행하는 것을 특징으로 하는 NCR.
- 제14 항에 있어서,상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보는 하나의 상위 계층 메시지 내에 포함되는 것을 특징으로 하는 NCR.
- 제15 항에 있어서,상기 상위 계층 메시지는은 상기 제1 포워딩 동작 및 상기 제2 포워딩 동작이 수행될 셀(cell) 또는 반송파를 지시하는 정보를 더 포함하는 것을 특징으로 하는 NCR.
- 제15 항에 있어서,상기 제1 사이드 제어 정보는 상기 제1 포워딩 동작이 수행될 셀 또는 반송파를 지시하는 정보를 더 포함하고,상기 제2 사이드 제어 정보는 상기 제2 포워딩 동작이 수행될 셀 또는 반송파를 지시하는 정보를 더 포함하는 것을 특징으로 하는 NCR.
- 제15 항에 있어서,상기 상위 계층 메시지는 MAC(media access control)-CE(control element) 또는 RRC(radio resource control) 메시지 중 적어도 하나를 포함하는 것을 특징으로 하는 NCR.
- 제14 항에 있어서,상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보 각각은 하향링크 제어 정보(downlink control information: DCI)를 통해 수신되는 것을 특징으로 하는 NCR.
- 제19 항에 있어서,상기 제1 사이드 제어 정보는 제1 DCI를 통해 수신되고, 상기 제2 사이드 제어 정보는 제2 DCI를 통해 수신되는 것을 특징으로 하는 NCR.
- 제20 항에 있어서,상기 제1 DCI 및 상기 제2 DCI는 서로 동일한 검색 공간(search space)에서 수신되는 것을 특징으로 하는 NCR.
- 제20 항에 있어서,상기 제1 DCI는 제1 검색 공간에서 수신되고, 상기 제2 DCI는 제2 검색 공간에서 수신되며, 상기 제1 검색 공간과 상기 제2 검색 공간은 서로 구분되는 검색 공간들인 것을 특징으로 하는 NCR.
- 제20 항에 있어서,상기 제1 DCI는 상기 제1 포워딩 동작이 수행될 셀 또는 반송파를 지시하는 정보를 더 포함하고,상기 제2 DCI는 상기 제2 포워딩 동작이 수행될 셀 또는 반송파를 지시하는 정보를 더 포함하는 것을 특징으로 하는 NCR.
- 제14 항에 있어서, 상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보는 동일한 하향링크 제어 정보(downlink control information: DCI)의 서로 다른 필드들을 통해 수신되는 것을 특징으로 하는 NCR.
- 제24 항에 있어서, 상기 동일한 DCI 내에서의 상기 제1 사이드 제어 정보의 위치 및 상기 제2 사이드 제어 정보의 위치를 알려주는 정보를 더 수신하는 것을 특징으로 하는 NCR.
- 제14 항에 있어서, 상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보 각각을 수신하는 셀과 상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보 각각이 적용되는 셀 간의 맵핑 관계를 알려주는 정보를 더 수신하는 것을 특징으로 하는 NCR.
- NCR(network-controlled repeater)-MT(mobile termination) 및 NCR-Fwd(Forwarding)을 포함하는 NCR의 장치는,적어도 하나의 메모리; 및상기 적어도 하나의 메모리와 동작 가능하게 결합된 적어도 하나의 프로세서를 포함하되, 상기 프로세서는,상기 NCR-MT을 통해 네트워크와 초기 접속 절차를 수행하고,상기 NCR-MT을 통해 상기 네트워크로부터 제1 사이드 제어 정보 및 제2 사이드 제어 정보를 수신하고,상기 제1 사이드 제어 정보에 기반하여 제1 주파수 대역에서 제1 포워딩(forwarding) 동작을 상기 NCR-Fwd을 통해 수행하고, 및상기 제2 사이드 제어 정보에 기반하여 제2 주파수 대역에서 제2 포워딩 동작을 상기 NCR-Fwd을 통해 수행하는 것을 특징으로 하는 장치.
- 적어도 하나의 프로세서(processor)에 의해 실행되는 것에 기반하는 명령어(instruction)를 포함하는 적어도 하나의 컴퓨터로 읽을 수 있는 기록매체(computer readable medium: CRM)은,네트워크와 초기 접속 절차를 수행하고,상기 네트워크로부터 제1 사이드 제어 정보 및 제2 사이드 제어 정보를 수신하고,상기 제1 사이드 제어 정보에 기반하여 제1 주파수 대역에서 제1 포워딩(forwarding) 동작을 수행하고, 및상기 제2 사이드 제어 정보에 기반하여 제2 주파수 대역에서 제2 포워딩 동작을 수행하는 것을 특징으로 하는 CRM.
- 무선 통신 시스템에서 기지국의 동작 방법에 있어서,NCR(network-controlled repeater)-MT(mobile termination) 및 NCR-Fwd(Forwarding)을 포함하는 NCR과 초기 접속 절차를 수행하고,상기 NCR에게 제1 사이드 제어 정보 및 제2 사이드 제어 정보를 전송하고,상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보에 기반하여 제1 주파수 대역 및 제2 주파수 대역 중 적어도 하나에서 상기 NCR로부터 신호를 수신하거나 상기 NCR에게 신호를 전송하되,상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보는 서로 독립적인 사이드 제어 정보들인 것을 특징으로 하는 방법.
- 기지국은,적어도 하나의 트랜시버;적어도 하나의 메모리; 및상기 적어도 하나의 메모리 및 상기 트랜시버와 동작 가능하게 결합된 적어도 하나의 프로세서를 포함하되, 상기 적어도 하나의 프로세서는,NCR(network-controlled repeater)-MT(mobile termination) 및 NCR-Fwd(Forwarding)을 포함하는 NCR과 초기 접속 절차를 수행하고,상기 NCR에게 제1 사이드 제어 정보 및 제2 사이드 제어 정보를 전송하고,상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보에 기반하여 제1 주파수 대역 및 제2 주파수 대역 중 적어도 하나에서 상기 NCR로부터 신호를 수신하거나 상기 NCR에게 신호를 전송하되,상기 제1 사이드 제어 정보 및 상기 제2 사이드 제어 정보는 서로 독립적인 사이드 제어 정보들인 것을 특징으로 하는 기지국.
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| US18/851,398 US20250212264A1 (en) | 2022-03-31 | 2023-03-27 | Operation method of apparatus in wireless communication system and apparatus using same method |
| EP23781261.5A EP4503494A4 (en) | 2022-03-31 | 2023-03-27 | METHOD OF NODE OPERATION IN A WIRELESS COMMUNICATION SYSTEM AND DEVICE USING SAID METHOD |
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| US8472868B2 (en) * | 2009-05-06 | 2013-06-25 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for MIMO repeater chains in a wireless communication network |
| US20210036764A1 (en) * | 2019-08-01 | 2021-02-04 | Qualcomm Incorporated | Control method for smart repeaters |
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| US20210298069A1 (en) * | 2020-03-23 | 2021-09-23 | Qualcomm Incorporated | Access procedure configuration of a millimeter wave repeater |
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| US12295002B2 (en) * | 2018-07-20 | 2025-05-06 | Qualcomm Incorporated | Multi-carrier scheduling and search space activation |
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| WO2022047348A2 (en) * | 2020-08-31 | 2022-03-03 | Yunjung Yi | Multi-cell downlink control information validation |
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| US20210036764A1 (en) * | 2019-08-01 | 2021-02-04 | Qualcomm Incorporated | Control method for smart repeaters |
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| EP4503494A1 (en) | 2025-02-05 |
| KR20240168297A (ko) | 2024-11-29 |
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