WO2024080716A1 - 무선 통신 시스템에서 채널 상태 정보 보고 방법 및 장치 - Google Patents
무선 통신 시스템에서 채널 상태 정보 보고 방법 및 장치 Download PDFInfo
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- WO2024080716A1 WO2024080716A1 PCT/KR2023/015569 KR2023015569W WO2024080716A1 WO 2024080716 A1 WO2024080716 A1 WO 2024080716A1 KR 2023015569 W KR2023015569 W KR 2023015569W WO 2024080716 A1 WO2024080716 A1 WO 2024080716A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
- H04L5/0094—Indication of how sub-channels of the path are allocated
Definitions
- This disclosure relates to a method and device for reporting channel state information in a wireless communication system.
- 5G mobile communication technology defines a wide frequency band to enable fast transmission speeds and new services, and includes sub-6 GHz ('Sub 6GHz') bands such as 3.5 gigahertz (3.5 GHz) as well as millimeter wave (mm) bands such as 28 GHz and 39 GHz. It is also possible to implement it in the ultra-high frequency band ('Above 6GHz') called Wave.
- 'Sub 6GHz' sub-6 GHz
- mm millimeter wave
- Wave ultra-high frequency band
- 6G mobile communication technology which is called the system of Beyond 5G
- Terra is working to achieve a transmission speed that is 50 times faster than 5G mobile communication technology and an ultra-low delay time that is reduced to one-tenth. Implementation in Terahertz bands (e.g., 95 GHz to 3 THz) is being considered.
- ultra-wideband services enhanced Mobile BroadBand, eMBB
- ultra-reliable low-latency communications URLLC
- massive machine-type communications mMTC
- numerology support multiple subcarrier interval operation, etc.
- dynamic operation of slot format initial access technology to support multi-beam transmission and broadband
- definition and operation of BWP Band-Width Part
- New channel coding methods such as LDPC (Low Density Parity Check) codes for data transmission and Polar Code for highly reliable transmission of control information
- L2 pre-processing L2 pre-processing
- dedicated services specialized for specific services. Standardization of network slicing, etc., which provides networks, has been carried out.
- V2X Vehicle-to-Everything
- NR-U New Radio Unlicensed
- UE Power Saving NR terminal low power consumption technology
- NTN Non-Terrestrial Network
- IAB provides a node for expanding the network service area by integrating intelligent factories (Industrial Internet of Things, IIoT) to support new services through linkage and convergence with other industries, and wireless backhaul links and access links.
- Intelligent factories Intelligent Internet of Things, IIoT
- Mobility Enhancement including Conditional Handover and DAPS (Dual Active Protocol Stack) handover
- 2-step Random Access (2-step RACH for simplification of random access procedures)
- Standardization in the field of wireless interface architecture/protocol for technologies such as NR is also in progress
- a 5G baseline for incorporating Network Functions Virtualization (NFV) and Software-Defined Networking (SDN) technology Standardization in the field of system architecture/services for architecture (e.g., Service based Architecture, Service based Interface) and Mobile Edge Computing (MEC), which provides services based on the location of the terminal, is also in progress.
- NFV Network Functions Virtualization
- SDN Software-Defined Networking
- FD-MIMO full dimensional MIMO
- array antennas to ensure coverage in the terahertz band of 6G mobile communication technology.
- multi-antenna transmission technology such as Large Scale Antenna, metamaterial-based lens and antenna to improve coverage of terahertz band signals, high-dimensional spatial multiplexing technology using OAM (Orbital Angular Momentum), RIS ( In addition to Reconfigurable Intelligent Surface technology, Full Duplex technology, satellite, and AI (Artificial Intelligence) to improve the frequency efficiency of 6G mobile communication technology and system network are utilized from the design stage and end-to-end.
- the disclosed embodiment seeks to provide a method and device for reporting channel state information in a wireless communication system.
- it provides a method and device for efficiently generating, interpreting, transmitting and receiving partial band setting information for a base station and a terminal to report channel state information.
- the present invention to solve the above problems is a method performed by a terminal of a communication system, receiving a bitmap indicating a subband for reporting channel state information (CSI) from a base station. step; Generating CSI based on one or more partial bands for CSI reporting identified based on the bitmap; and transmitting the CSI to the base station, wherein the one or more partial bands are identified using a first method or a second method for confirming the one or more partial bands by interpreting the bitmap.
- CSI channel state information
- a method performed by a base station of a communication system includes transmitting a bitmap indicating a subband for reporting channel state information (CSI) to a terminal; and receiving CSI from the terminal, wherein the CSI is based on one or more sub-bands for reporting the CSI indicated by the bitmap, and the one or more sub-bands interpret the bitmap to determine the one or more sub-bands. It is characterized in that it is confirmed using a first method or a second method to confirm the above partial band.
- CSI channel state information
- a transceiver unit In a terminal of a communication system, a transceiver unit; And receiving a bitmap indicating a subband for channel state information (CSI) reporting from the base station, and based on one or more subbands for CSI reporting identified based on the bitmap. and a control unit that generates CSI and controls transmission of the CSI to the base station, and the one or more partial bands are confirmed using a first method or a second method for interpreting the bitmap and confirming the one or more partial bands. It is characterized by being
- a transceiver unit in a base station of a communication system, a transceiver unit; And a control unit that transmits a bitmap indicating a subband for reporting channel state information (CSI) to the terminal and controls to receive CSI from the terminal, and the CSI is transmitted to the bitmap. Based on one or more partial bands for the CSI reporting indicated by, and the one or more partial bands are confirmed using a first method or a second method for interpreting the bitmap to confirm the one or more partial bands. It is characterized by
- a communication method and device capable of effectively reporting channel state information in a wireless communication system can be provided.
- Figure 1 is a diagram showing an example of the basic structure of the time-frequency domain of a 5G communication system.
- Figure 2 is a diagram showing an example of a slot structure used in a 5G communication system.
- Figure 3 is a diagram showing an example of settings for a bandwidth part (BWP) of a 5G communication system.
- BWP bandwidth part
- Figure 4 is a diagram showing an example of a control resource set through which a downlink control channel is transmitted in a 5G communication system.
- Figure 5 is a diagram showing an example of the structure of a downlink control channel in a 5G communication system.
- Figure 6 is a diagram showing an example of an aperiodic CSI reporting method.
- FIG. 7 is a diagram illustrating an example of a method for allocating a partial band index when reporting partial band channel state information according to the present disclosure.
- FIG. 8 is a diagram illustrating an example of a method in which the same operation can be derived between different partial-band channel state information reporting methods according to the present disclosure.
- FIG. 9 is a diagram illustrating another example of a method in which the same operation can be achieved between different partial-band channel state information reporting methods according to the present disclosure.
- FIG. 10 is a diagram illustrating another example of a method in which the same operation can be achieved between different partial-band channel state information reporting methods according to the present disclosure.
- FIG. 11 is a diagram illustrating another example of a method in which the same operation can be achieved between different partial-band channel state information reporting methods according to the present disclosure.
- FIG. 12 is a diagram illustrating another example of a method in which the same operation can be achieved between different partial-band channel state information reporting methods according to the present disclosure.
- FIG. 13A is a diagram illustrating an example of an operation performed by a terminal according to an embodiment of the present disclosure.
- FIG. 13B is a diagram illustrating an example of an operation performed by a base station according to an embodiment of the present disclosure.
- Figure 14 is a block diagram showing the structure of a terminal according to an embodiment of the present disclosure.
- Figure 15 is a block diagram showing the structure of a base station according to an embodiment of the present disclosure.
- the base station is the entity that performs resource allocation for the terminal and may be at least one of gNode B, eNode B, Node B, BS (Base Station), wireless access unit, base station controller, or node on the network.
- a terminal may include a UE (User Equipment), MS (Mobile Station), a cellular phone, a smartphone, a computer, or a multimedia system capable of performing communication functions.
- DL downlink
- MS Mobile Station
- UL uplink
- LTE, LTE-A or 5G system may be described below as an example, embodiments of the present disclosure can also be applied to other communication systems with similar technical background or channel type.
- this may include the 5th generation mobile communication technology (5G, new radio, NR) developed after LTE-A, and the term 5G hereinafter may also include the existing LTE, LTE-A, and other similar services.
- 5G new radio
- this disclosure may be applied to other communication systems through some modifications without significantly departing from the scope of the present disclosure at the discretion of a person with skilled technical knowledge.
- each block of the processing flow diagrams and combinations of the flow diagram diagrams can be performed by computer program instructions.
- These computer program instructions can be mounted on a processor of a general-purpose computer, special-purpose computer, or other programmable data processing equipment, so that the instructions performed through the processor of the computer or other programmable data processing equipment are described in the flow chart block(s). It creates the means to perform functions.
- These computer program instructions may also be stored in computer-usable or computer-readable memory that can be directed to a computer or other programmable data processing equipment to implement a function in a particular manner, so that the computer-usable or computer-readable memory
- the instructions stored in may also produce manufactured items containing instruction means that perform the functions described in the flow diagram block(s).
- Computer program instructions can also be mounted on a computer or other programmable data processing equipment, so that a series of operational steps are performed on the computer or other programmable data processing equipment to create a process that is executed by the computer, thereby generating a process that is executed by the computer or other programmable data processing equipment. Instructions that perform processing equipment may also provide steps for executing the functions described in the flow diagram block(s).
- each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s).
- each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical function(s).
- ' ⁇ unit' used in this embodiment refers to software or hardware components such as FPGA (Field Programmable Gate Array) or ASIC (Application Specific Integrated Circuit), and ' ⁇ unit' performs certain roles. do.
- ' ⁇ part' is not limited to software or hardware.
- the ' ⁇ part' may be configured to reside in an addressable storage medium and may be configured to reproduce on one or more processors. Therefore, as an example, ' ⁇ part' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, procedures, Includes subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables.
- components and 'parts' may be combined into a smaller number of components and 'parts' or may be further separated into additional components and 'parts'.
- the components and 'parts' may be implemented to regenerate one or more CPUs within the device or secure multimedia card.
- ' ⁇ part' may include one or more processors.
- Wireless communication systems have moved away from providing early voice-oriented services to, for example, 3GPP's HSPA (High Speed Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), and LTE-Advanced.
- Broadband wireless that provides high-speed, high-quality packet data services such as communication standards such as (LTE-A), LTE-Pro, 3GPP2's High Rate Packet Data (HRPD), UMB (Ultra Mobile Broadband), and IEEE's 802.16e. It is evolving into a communication system.
- the LTE system adopts OFDM (orthogonal frequency division multiplexing) in the downlink (DL), and single carrier frequency division multiple (SC-FDMA) in the uplink (UL). access method is adopted.
- Uplink refers to a wireless link through which a terminal (user equipment, UE or mobile station, MS) transmits data or control signals to a base station (eNode B, gNode B, or base station, BS), and downlink refers to a wireless link where the base station transmits data or control signals to the terminal. It refers to a wireless link that transmits data or control signals.
- the time-frequency resources to carry data or control information for each user are usually allocated and operated so that they do not overlap, that is, orthogonality is established, so that each user's data or control information is distinguished. It can be done as much as possible.
- the 5G communication system must be able to freely reflect the various requirements of users and service providers, so services that simultaneously satisfy various requirements must be supported.
- Services considered for the 5G communication system include enhanced mobile broadband (eMBB), massive machine type communication (mMTC), ultra reliability low latency communication (URLLC), etc. There is.
- eMBB aims to provide more improved data transmission speeds than those supported by existing LTE, LTE-A or LTE-Pro.
- eMBB in a 5G communication system, eMBB must be able to provide a peak data rate of 20Gbps in the downlink and 10Gbps in the uplink from the perspective of one base station.
- the 5G communication system must provide the maximum transmission rate and at the same time provide increased user perceived data rate.
- improvements in various transmission and reception technologies are required, including more advanced multi-antenna (multi input multi output, MIMO) transmission technology.
- the 5G communication system uses a frequency bandwidth wider than 20MHz in the 3 ⁇ 6GHz or above 6GHz frequency band, thereby transmitting the data required by the 5G communication system. Transmission speed can be satisfied.
- mMTC is being considered to support application services such as the Internet of Things (IoT) in 5G communication systems.
- IoT Internet of Things
- mMTC requires support for access to a large number of terminals within a cell, improved coverage of terminals, improved battery time, and reduced terminal costs.
- the Internet of Things provides communication functions by attaching various sensors and various devices, it must be able to support a large number of terminals (for example, 1,000,000 terminals/km 2 ) within a cell.
- terminals that support mMTC are likely to be located in shadow areas that cannot be covered by cells, such as the basement of a building, so they may require wider coverage than other services provided by the 5G communication system.
- Terminals that support mMTC must be composed of low-cost terminals, and since it is difficult to frequently replace the terminal's battery, a very long battery life time, such as 10 to 15 years, may be required.
- URLLC is a cellular-based wireless communication service used for a specific purpose (mission-critical). For example, remote control of robots or machinery, industrial automation, unmanned aerial vehicles, remote health care, emergency situations. Services used for emergency alerts, etc. can be considered. Therefore, the communication provided by URLLC must provide very low latency and very high reliability. For example, a service that supports URLLC must satisfy an air interface latency of less than 0.5 milliseconds and has a packet error rate of less than 10 -5 . Therefore, for services supporting URLLC, the 5G system must provide a smaller transmit time interval (TTI) than other services, and at the same time, it is a design that must allocate wide resources in the frequency band to ensure the reliability of the communication link. Specifications may be required.
- TTI transmit time interval
- the three services of the 5G communication system namely eMBB, URLLC, and mMTC, can be multiplexed and transmitted in one system. At this time, different transmission/reception techniques and transmission/reception parameters may be used between services to satisfy the different requirements of each service.
- the 5G communication system is not limited to the three services mentioned above.
- Figure 1 is a diagram showing an example of the basic structure of the time-frequency domain of a 5G communication system.
- the horizontal axis represents the time domain and the vertical axis represents the frequency domain.
- the basic unit of resources in the time and frequency domains is a resource element (RE) 101, which can be defined as 1 OFDM symbol 102 on the time axis and 1 subcarrier (103) on the frequency axis.
- RE resource element
- 1 OFDM symbol 102 on the time axis
- 1 subcarrier (103) on the frequency axis.
- consecutive REs may constitute one resource block (RB, 104).
- Figure 2 is a diagram showing an example of a slot structure used in a 5G communication system.
- 1 frame (200) can be defined as 10ms.
- 1 subframe 201 may be defined as 1 ms, and therefore 1 frame 200 may consist of a total of 10 subframes 201.
- 1 subframe 201 may be composed of one or a plurality of slots 202, 203, and the number of slots 202, 203 per 1 subframe 201 is set to the subcarrier spacing ⁇ (204, 205). ) may vary depending on the condition. In an example of FIG.
- bandwidth part (BWP) settings in the 5G communication system will be described in detail with reference to the drawings.
- Figure 3 is a diagram showing an example of settings for BWP in a 5G communication system.
- the UE bandwidth (300) is set to two bandwidth parts, that is, BWP#1 (301) and BWP#2 (302).
- the base station can set one or more BWPs to the terminal, and can set the information in Table 2 below for each BWP.
- BWP SEQUENCE ⁇ bwp-Id BWP-Id, (Bandwidth part identifier) locationAndBandwidth INTEGER (1..65536); (Bandwidth part location) subcarrierSpacing ENUMERATED ⁇ n0, n1, n2, n3, n4, n5 ⁇ , (subcarrier spacing) cyclicPrefix ENUMERATED ⁇ extended ⁇ (Cyclic transposition) ⁇
- the settings for BWP are not limited to the above example, and in addition to the above setting information, various parameters related to BWP may be set to the terminal.
- Configuration information may be transmitted from the base station to the terminal through higher layer signaling, for example, radio resource control (RRC) signaling.
- RRC radio resource control
- at least one BWP may be activated. Whether to activate the configured BWP may be transmitted semi-statically from the base station to the terminal through RRC signaling or dynamically through downlink control information (DCI).
- DCI downlink control information
- the terminal before RRC connection may receive an initial BWP (initial BWP) for initial connection from the base station through a master information block (MIB).
- the terminal uses a physical downlink control channel (PDCCH) to receive system information (which may correspond to remaining system information, RMSI, or system information block 1, SIB1) required for initial access through MIB in the initial access stage. ) can receive setting information about the control resource set (CORESET) and search space that can be transmitted.
- the control resource set and search space set as MIB can each be considered to correspond to identifier (ID) 0.
- the base station can notify the terminal of setting information such as frequency allocation information, time allocation information, and numerology for control resource set #0 through the MIB. Additionally, the base station can notify the terminal of configuration information about the monitoring cycle and occasion for control resource set #0, that is, configuration information about search space #0, through the MIB.
- the terminal may regard the frequency region set as control resource set #0 obtained from the MIB as the initial BWP for initial access. At this time, the identifier (ID) of the initial BWP may be regarded as 0.
- the terminal can receive a physical downlink shared channel (PDSCH) through which the SIB is transmitted.
- PDSCH physical downlink shared channel
- the initial BWP can also be used for other system information (OSI), paging, and random access.
- OSI system information
- paging paging
- random access random access
- the setting for BWP can be used when the bandwidth supported by the terminal is smaller than the system bandwidth.
- the base station sets the frequency location of the BWP to the terminal, allowing the terminal to transmit and receive data at a specific frequency location within the system bandwidth.
- the base station may set a plurality of BWPs to the terminal for the purpose of supporting different numerologies. For example, in order to support both data transmission and reception for a terminal using a subcarrier spacing of 15kHz and a subcarrier spacing of 30kHz, the base station can set two BWPs to use subcarrier spacings of 15kHz and 30kHz, respectively.
- Different BWPs can be frequency division multiplexed (FDM), and when the base station wants to transmit and receive data at a specific subcarrier interval, the BWP set at the corresponding subcarrier interval can be activated.
- FDM frequency division multiplexed
- the base station may set BWPs with bandwidths of different sizes to the terminal. For example, if the terminal supports a very large bandwidth, for example, 100 MHz, and always transmits and receives data through that bandwidth, very large power consumption may occur. In particular, monitoring an unnecessary downlink control channel with a large bandwidth of 100 MHz in a situation where there is no traffic can be very inefficient in terms of power consumption.
- the base station may set the terminal to a BWP of a relatively small bandwidth, for example, a BWP of 20 MHz. In a situation where there is no traffic, the terminal can perform monitoring operations at the 20 MHz BWP, and when data is generated, it can transmit and receive data at the 100 MHz BWP according to the instructions of the base station.
- the base station can instruct the terminal to change the BWP using the BWP Indicator field in the DCI. For example, in Figure 3, if the currently activated BWP of the terminal is BWP#1 (301), the base station may indicate BWP#2 (302) to the terminal as the BWP indicator in the DCI, and the terminal may indicate BWP #2 (302) as the BWP indicator in the received DCI. BWP change can be performed with BWP#2 (302) indicated by .
- SS/PBCH block synchronization signal/physical broadcast channel block
- SS/PBCH block may refer to a physical layer channel block consisting of primary SS (PSS), secondary SS (SSS), and PBCH. Specifically, it may be as follows.
- - PSS A signal that serves as a standard for downlink time/frequency synchronization and provides some information about the cell ID.
- - SSS It is the standard for downlink time/frequency synchronization and provides the remaining cell ID information not provided by PSS. Additionally, it can serve as a reference signal for demodulation of PBCH.
- Essential system information may include search space-related control information indicating radio resource mapping information of the control channel, scheduling control information for a separate data channel transmitting system information, etc.
- SS/PBCH block consists of a combination of PSS, SSS, and PBCH.
- One or more SS/PBCH blocks can be transmitted within 5ms, and each transmitted SS/PBCH block can be distinguished by an index.
- the terminal can detect PSS and SSS in the initial access stage and decode the PBCH.
- the MIB can be obtained from the PBCH, and control resource set #0 (which may correspond to a control resource set with a control resource set index of 0) can be set from it.
- the terminal can perform monitoring on control resource set #0 assuming that the demodulation reference signal (DMRS) transmitted in the selected SS/PBCH block and control resource set #0 is QCL (quasi co location).
- DMRS demodulation reference signal
- the terminal can receive system information through downlink control information transmitted from control resource set #0.
- the terminal can obtain RACH (random access channel)-related configuration information necessary for initial access from the received system information.
- the terminal can transmit PRACH (physical RACH) to the base station in consideration of the SS/PBCH index selected, and the base station receiving the PRACH can obtain information about the SS/PBCH block index selected by the terminal.
- the base station can know which block the terminal has selected among each SS/PBCH block and monitor the control resource set #0 associated with it.
- DCI downlink control information
- scheduling information for uplink data (or PUSCH) or downlink data (or PDSCH) can be transmitted from the base station to the terminal through DCI.
- the terminal can monitor the DCI format for fallback and the DCI format for non-fallback for PUSCH or PDSCH.
- the countermeasure DCI format may consist of fixed fields predefined between the base station and the terminal, and the non-contrast DCI format may include configurable fields.
- DCI can be transmitted through PDCCH, a physical downlink control channel, through channel coding and modulation processes.
- a cyclic redundancy check (CRC) is attached to the DCI message payload, and the CRC can be scrambled with a radio network temporary identifier (RNTI) corresponding to the identity of the terminal.
- RNTI radio network temporary identifier
- Different RNTIs may be used depending on the purpose of the DCI message, for example, UE-specific data transmission, power control command, or random access response. In other words, the RNTI is not transmitted explicitly but is transmitted included in the CRC calculation process.
- the terminal checks the CRC using the allocated RNTI, and if the CRC check result is correct, the terminal can know that the message was sent to the terminal.
- DCI scheduling PDSCH for system information may be scrambled with system information RNTI (SI-RNTI).
- SI-RNTI system information RNTI
- RAR random access response
- RA-RNTI random access RNTI
- P-RNTI paging RNTI
- DCI notifying SFI slot format indicator
- TPC transmit power control
- the DCI scheduling a UE-specific PDSCH or PUSCH may be scrambled into cell RNTI (C-RNTI), modulation coding scheme C-RNTI (MCS-C-RNTI), or configured scheduling RNTI (CS-RNTI).
- C-RNTI cell RNTI
- MCS-C-RNTI modulation coding scheme C-RNTI
- CS-RNTI configured scheduling RNTI
- DCI format 0_0 can be used as a fallback DCI for scheduling PUSCH, and at this time, CRC can be scrambled with C-RNTI.
- DCI format 0_0, in which the CRC is scrambled with C-RNTI, may include, for example, the following information.
- DCI format 0_1 can be used as a fallback DCI for scheduling PUSCH, and at this time, CRC can be scrambled with C-RNTI.
- DCI format 0_1, in which the CRC is scrambled with C-RNTI, may include, for example, the following information.
- DCI format 1_0 can be used as a fallback DCI for scheduling PDSCH, and at this time, CRC can be scrambled with C-RNTI.
- DCI format 1_0, in which the CRC is scrambled with C-RNTI, may include, for example, the following information.
- DCI format 1_1 can be used as a fallback DCI for scheduling PDSCH, and at this time, CRC can be scrambled with C-RNTI.
- DCI format 1_1, in which the CRC is scrambled with C-RNTI, may include, for example, the following information.
- the base station may set a table for time domain resource allocation information for PDSC) and PUSCH to the UE using higher layer signaling (e.g., RRC signaling).
- Time domain resource allocation information includes, for example, PDCCH-to-PDSCH slot timing (corresponding to the time interval in slot units between the time when PDCCH is received and the time when PDSCH scheduled by the received PDCCH is transmitted, denoted as K0) or PDCCH-to-PUSCH slot timing (corresponds to the time interval in slot units between the time when PDCCH is received and the time when PUSCH scheduled by the received PDCCH is transmitted, denoted as K2), when PDSCH or PUSCH is scheduled within the slot Information on the position and length of the start symbol, mapping type of PDSCH or PUSCH, etc. may be included. For example, information such as Table 7 and Table 8 below may be notified from the base station to the terminal.
- the base station may notify the terminal of one of the entries in the table for time domain resource allocation information through L1 signaling (e.g. DCI) (e.g., it may be indicated in the 'time domain resource allocation' field in DCI). .
- the terminal can obtain time domain resource allocation information for PDSCH or PUSCH based on the DCI received from the base station.
- the 5G wireless communication system supports two types of methods for indicating frequency domain resource allocation information for PDSCH and PUSCH, resource allocation type 0 and resource allocation type 1.
- RB allocation information may be notified from the base station to the terminal in the form of a bitmap for a resource block group (RBG).
- the RBG may be composed of a set of consecutive VRBs (virtual RBs), and the size P of the RBG is based on the value set as the upper layer parameter ( rbg-Size ) and the size value of the BWP defined in the table below. can be decided.
- N RBG bandwidth part i
- the size of the first RBG is .
- the size of all other RBGs is P.
- Each bit of a bitmap of N RBG bit size may correspond to each RBG.
- RBGs may be indexed in order of increasing frequency, starting from the lowest frequency position of the BWP.
- RBG#0 to RBG#(N RBG -1) may be mapped from the most significant bit (MSB) to the least significant bit (LSB) of the RBG bitmap. If the specific bit value in the bitmap is 1, the terminal may determine that the RBG corresponding to the bit value has been allocated, and if the specific bit value in the bitmap is 0, the terminal may determine that the RBG corresponding to the bit value has not been allocated. You can judge.
- RB allocation information may be notified from the base station to the terminal as information on the starting position and length of sequentially allocated VRBs. At this time, interleaving or non-interleaving may be additionally applied to consecutively allocated VRBs.
- the resource allocation field of resource allocation type 1 may be composed of a resource indication value (RIV), and RIV may be composed of the start point of the VRB (RB start ) and the length of the continuously allocated RB (L RBs ). You can. More specifically, The RIV within a BWP of size can be defined as follows.
- the base station can set the resource allocation type through higher layer signaling to the terminal (for example, the upper layer parameter resourceAllocation can be set to one of resourceAllocationType0, resourceAllocationType1, or dynamicSwitch.). If the UE is configured with both resource allocation types 0 and 1 (or equally, the upper layer parameter resourceAllocation is set to dynamicSwitch), the base station uses a bit corresponding to the MSB of the field indicating resource allocation in the DCI format indicating scheduling. You can indicate whether the resource allocation type is resource allocation type 0 or resource allocation type 1. Additionally, based on the indicated resource allocation type, resource allocation information may be indicated through the remaining bits excluding the bit corresponding to the MSB, and the terminal may interpret the resource allocation field information of the DCI field based on this.
- the upper layer parameter resourceAllocation can be set to one of resourceAllocationType0, resourceAllocationType1, or dynamicSwitch.
- the base station uses a bit corresponding to the MSB of the field indicating resource allocation in the DCI format indicating
- resource allocation type 0 or resource allocation type 1 indicates resource allocation in the DCI format that indicates scheduling.
- Resource allocation information may be indicated based on the resource allocation type for which the field is set, and the terminal can interpret the resource allocation field information of the DCI field based on this.
- Figure 4 is a diagram showing an example of a control resource set through which a downlink control channel is transmitted in a 5G communication system.
- control resource set #1 (401), control resource set #2 (402) within one slot (420) on the time axis. )) can be set.
- the control resource sets (401, 402) can be set to a specific frequency resource (403) within the entire terminal BWP (410) on the frequency axis.
- the control resource sets 401 and 402 may be set to one or multiple OFDM symbols on the time axis, which may be defined as a control resource set length (control resource set duration, 404).
- control resource set #1 (401) is set to a control resource set length of 2 symbols
- control resource set #2 (402) is set to a control resource set length of 1 symbol. there is.
- the control resource set in the above-described 5G communication system can be set by the base station to the terminal through higher layer signaling (eg, SI, MIB, RRC signaling, etc.).
- Setting a control resource set to a terminal means providing information such as the control resource set identifier, the frequency location of the control resource set, and the symbol length of the control resource set. For example, it may include the information in Table 10 below.
- ControlResourceSet SEQUENCE ⁇ -- Corresponds to L1 parameter 'CORESET-ID' controlResourceSetId ControlResourceSetId, (Control Resource Set Identifier (Identity)) frequencyDomainResources BIT STRING (SIZE (45)), (Frequency axis resource allocation information) duration INTEGER (1..maxCoReSetDuration), (Time axis resource allocation information) cce-REG-MappingType CHOICE ⁇ (CCE-to-REG mapping method) interleaved SEQUENCE ⁇ reg-BundleSize ENUMERATED ⁇ n2, n3, n6 ⁇ , (REG bundle size) precoderGranularity ENUMERATED ⁇ sameAsREG-bundle, allContiguousRBs ⁇ , interleaverSize ENUMERATED ⁇ n2, n3, n6 ⁇ (Interleaver size) shiftIndex INTEGER(0..maxNrofPhysicalResourceBlocks
- the tci-StatesPDCCH (simply named TCI (transmission configuration indication) state) configuration information is one or more SS/PBCH block indexes or CSI-RS in a QCL relationship with the DMRS transmitted in the corresponding control resource set.
- TCI transmission configuration indication
- channel state information reference signal may include index information.
- Figure 5 is a diagram showing an example of the structure of a downlink control channel in a 5G wireless communication system.
- the basic unit of time and frequency resources constituting the control channel can be referred to as REG (resource element group, 503), and REG 503 is 1 OFDM symbol 501 on the time axis and 1 OFDM symbol 501 on the frequency axis.
- 1 PRB physical resource block, 502
- the base station can configure a downlink control channel allocation unit by concatenating REGs 503.
- 1 CCE 504 may be composed of a plurality of REGs 503. .
- REG 503 may be composed of 12 REs
- 1 CCE 504 may consist of 72 REs.
- the corresponding area may be composed of a plurality of CCEs (504), and a specific downlink control channel may be configured with one or multiple CCEs (504) depending on the aggregation level (AL) within the control resource set. ) can be mapped and transmitted.
- CCEs 504 in the control resource set are classified by numbers, and at this time, the numbers of CCEs 504 can be assigned according to a logical mapping method.
- the basic unit of the downlink control channel shown in FIG. 5, that is, REG 503, may include both REs to which DCI is mapped and an area to which DMRS 505, a reference signal for decoding the same, is mapped.
- three DMRSs 505 can be transmitted within 1 REG 503.
- the terminal must detect a signal without knowing information about the downlink control channel, and a search space representing a set of CCEs is defined for blind decoding.
- the search space is a set of downlink control channel candidates consisting of CCEs that the terminal must attempt to decode on a given aggregation level, and various aggregations that make one bundle with 1, 2, 4, 8, or 16 CCEs. Because there are levels, the terminal can have multiple search spaces.
- a search space set can be defined as a set of search spaces at all set aggregation levels.
- Search space can be classified into common search space and UE-specific search space.
- a certain group of UEs or all UEs may search the common search space of the PDCCH to receive cell common control information such as dynamic scheduling or paging messages for SI.
- cell common control information such as dynamic scheduling or paging messages for SI.
- PDSCH scheduling allocation information for SIB transmission can be received by examining the common search space of the PDCCH.
- a certain group of UEs or all UEs must receive the PDCCH, so it can be defined as a set of pre-arranged CCEs.
- Scheduling allocation information for a UE-specific PDSCH or PUSCH can be received by examining the UE-specific search space of the PDCCH.
- the terminal-specific search space can be defined terminal-specifically as a function of the terminal's identity and various system parameters.
- parameters for the search space for the PDCCH can be set from the base station to the terminal through higher layer signaling.
- the base station monitors the number of PDCCH candidates at each aggregation level L, the monitoring period for the search space, the monitoring occasion for each symbol within a slot for the search space, the type of search space (common search space or UE-specific search space),
- the combination of DCI format and RNTI to be monitored in the search space, the control resource set index to be monitored in the search space, etc. can be set to the terminal.
- parameters for the search space for PDCCH may include the information in Table 11 below.
- SearchSpace :: SEQUENCE ⁇ -- Identity of the search space.
- SearchSpaceId 0 identifies the SearchSpace configured via PBCH (MIB) or ServingCellConfigCommon.
- searchSpaceId SearchSpaceId, (search space identifier) controlResourceSetId ControlResourceSetId, (Control resource set identifier) monitoringSlotPeriodicityAndOffset CHOICE ⁇ (Monitoring slot level cycle) sl1 NULL; sl2 INTEGER (0..1); sl4 INTEGER (0..3); sl5 INTEGER (0..4); sl8 INTEGER (0..7); sl10 INTEGER (0..9); sl16 INTEGER (0..15); sl20 INTEGER (0..19) ⁇ OPTIONAL; duration (monitoring length) INTEGER (2..2559) monitoringSymbolsWithinSlot BIT STRING (SIZE (14)) OPTIONAL, (Monitoring symbol in
- the base station can configure one or more search space sets for the terminal.
- the base station can configure search space set 1 and search space set 2 for the UE, and configure DCI format A scrambled with X-RNTI in search space set 1 to be monitored in the common search space, and search In space set 2, DCI format B scrambled with Y-RNTI can be set to be monitored in the terminal-specific search space.
- one or multiple search space sets may exist in the common search space or the terminal-specific search space.
- search space set #1 and search space set #2 may be set as common search spaces
- search space set #3 and search space set #4 may be set as terminal-specific search spaces.
- the combination of the following DCI format and RNTI can be monitored.
- this is not limited to the examples below.
- the specified RNTIs may follow the definitions and uses below.
- C-RNTI UE-specific PDSCH scheduling purpose
- MCS-C-RNTI UE-specific PDSCH scheduling purpose
- TC-RNTI temporary cell RNTI
- CS-RNTI Semi-statically configured UE-specific PDSCH scheduling purpose
- RA-RNTI PDSCH scheduling use in random access phase
- P-RNTI PDSCH scheduling purpose on which paging is transmitted
- SI-RNTI PDSCH scheduling purpose where system information is transmitted
- INT-RNTI interruption RNTI
- TPC-PUSCH-RNTI transmit power control for PUSCH RNTI
- TPC-PUCCH-RNTI transmit power control for PUCCH RNTI
- TPC-SRS-RNTI Transmit power control for SRS RNTI: Used to indicate power control commands for SRS (sounding reference signal)
- the search space of the aggregation level L in the control resource set p and the search space set s can be expressed as the following equation.
- Terminal identifier Terminal identifier
- the value may correspond to 0 in the case of a common search space.
- the value may correspond to a value that changes depending on the UE's identity (C-RNTI or ID set to the UE by the base station) and time index.
- CSI framework to instruct the base station to measure and report the channel state information (CSI) of the terminal.
- CSI framework can consist of at least two elements, a resource setting and a report setting, and the report setting can have a connection relationship with each other by referencing at least one ID of the resource setting. there is.
- the resource setting may include information related to a reference signal for the terminal to measure channel state information.
- the base station can set at least one resource setting to the terminal.
- the base station and the terminal can transmit and receive signaling information as shown in Table 13 to convey information about resource settings.
- CSI-ResourceConfig SEQUENCE ⁇ csi-ResourceConfigId CSI-ResourceConfigId, csi-RS-ResourceSetList CHOICE ⁇ nzp-CSI-RS-SSB SEQUENCE ⁇ nzp-CSI-RS-ResourceSetList SEQUENCE (SIZE (1..maxNrofNZP-CSI-RS-ResourceSetsPerConfig)) OF NZP-CSI-RS-ResourceSetId OPTIONAL, --Need R csi-SSB-ResourceSetList SEQUENCE (SIZE (1..maxNrofCSI-SSB-ResourceSetsPerConfig)) OF CSI-SSB-ResourceSetId OPTIONAL -- Need R ⁇ , csi-IM-ResourceSetList SEQUENCE (SIZE (1..maxNrofCSI-IM-ResourceSetsPerConfig))
- signaling information CSI-ResourceConfig contains information about each resource setting.
- Each CSI-ResourceConfig may include S( ⁇ 1) CSI resource sets (given by the upper layer parameter csi-RS-ResourceSetList).
- Each CSI resource set may be located in a DL BWP identified by the upper layer parameter bwp-id, and the resource setting may be linked to the report setting of the same downlink BWP.
- each resource setting is a resource setting index (csi-ResourceConfigId) or BWP index (bwp-ID) or a time axis transmission setting (resourceType) of the resource or at least one resource set (resource set).
- the time axis transmission settings of the resource may be set to aperiodic transmission, semi-persistent transmission, or periodic transmission.
- the resource set list may be a set containing a resource set for channel measurement or a set containing a resource set for interference measurement. If the resource set list is a set that includes resource sets for channel measurement, each resource set may include at least one resource, which may be a CSI reference signal (CSI-RS) resource or an index of an SS/PBCH block. It can be. If the resource set list is a set that includes resource sets for interference measurement, each resource set may include at least one interference measurement resource (CSI interference measurement, CSI-IM).
- CSI interference measurement CSI interference measurement, CSI-IM
- the base station and the terminal can transmit and receive signaling information as shown in Table 14 to deliver information about the resource set.
- NZP-CSI-RS-ResourceSet SEQUENCE ⁇ nzp-CSI-ResourceSetId NZP-CSI-RS-ResourceSetId, nzp-CSI-RS-Resources SEQUENCE (SIZE (1..maxNrofNZP-CSI-RS-ResourcesPerSet)) OF NZP-CSI-RS-ResourceId, repetition ENUMERATED ⁇ on, off ⁇ OPTIONAL, -- Need S aperiodicTriggeringOffset INTEGER(0..6) OPTIONAL, -- Need S trs-Info ENUMERATED ⁇ true ⁇ OPTIONAL, -- Need R ... ⁇ -- TAG-NZP-CSI-RS-RESOURCESET-STOP --ASN1STOP
- signaling information NZP-CSI-RS-ResourceSet contains information about each resource set.
- each resource set includes at least information about a resource set index (nzp-CSI-ResourceSetId) or an index set (nzp-CSI-RS-Resources) of the CSI-RS including, and the CSI-RS including It may include part of information about the spatial domain transmission filter of the RS resource (repetition) or whether the included CSI-RS resource is used for tracking (trs-Info).
- CSI-RS may be the most representative reference signal included in the resource set.
- the base station and the terminal can transmit and receive signaling information as shown in Table 15 to deliver information about CSI-RS resources.
- NZP-CSI-RS-Resource SEQUENCE ⁇ nzp-CSI-RS-ResourceId NZP-CSI-RS-ResourceId, resourceMapping CSI-RS-ResourceMapping, powerControlOffset INTEGER (-8..15); powerControlOffsetSS ENUMERATED ⁇ db-3, db0, db3, db6 ⁇ OPTIONAL, -- Need R scramblingID ScramblingId, periodicityAndOffset CSI-ResourcePeriodicityAndOffset OPTIONAL, -- Cond PeriodicOrSemiPersistent qcl-InfoPeriodicCSI-RS TCI-StateId OPTIONAL, -- Cond Periodic ... ⁇ -- TAG-NZP-CSI-RS-RESOURCE-STOP --ASN1STOP
- signaling information NZP-CSI-RS-Resource contains information about each CSI-RS.
- Information included in the signaling information NZP-CSI-RS-Resource may have the following meaning.
- CSI-RS is a periodic CSI-RS, TCI-state information
- the resourceMapping included in the signaling information NZP-CSI-RS-Resource represents resource mapping information of the CSI-RS resource, and includes frequency resource RE mapping, number of antenna ports, symbol mapping, CDM (code division multiplexing) type, frequency resource density, May include frequency band mapping information.
- the number of ports, frequency resource density, CDM type, and time-frequency axis RE mapping that can be set through this can have a value set in one of the rows of Table 16 below.
- Table 16 shows the frequency resource density, CDM type, frequency axis and time axis start position of the CSI-RS component RE pattern that can be set according to the number of CSI-RS ports (X) ( ), the number of REs on the frequency axis (k') and the number of REs on the time axis (l') of the CSI-RS configuration RE pattern.
- the above-described CSI-RS component RE pattern may be a basic unit that constitutes a CSI-RS resource.
- the CSI-RS component RE pattern can be composed of YZ REs.
- the time axis RE position can be specified by a bitmap of a total of 14 bits. At this time, it is possible to change the length of the bitmap, such as specifying the frequency position, depending on the Z value in Table 25, but since the principle is similar to the above description, redundant description will be omitted below.
- report settings may have a connection relationship with each other by referring to at least one ID of the resource setting, and resource setting(s) that have a connection relationship with the report setting are standards for measuring channel information.
- the measured channel information can be used to report channel information according to the reporting method set in the report setting that has a connection relationship.
- the report setting may include setting information related to the CSI reporting method.
- the base station and the terminal can transmit and receive signaling information as shown in Table 17 to convey information about report settings.
- CSI-ReportConfig SEQUENCE ⁇ reportConfigId CSI-ReportConfigId, carrier ServCellIndex OPTIONAL, -- Need S resourcesForChannelMeasurement CSI-ResourceConfigId, csi-IM-ResourcesForInterference CSI-ResourceConfigId OPTIONAL, -- Need R nzp-CSI-RS-ResourcesForInterference CSI-ResourceConfigId OPTIONAL, -- Need R reportConfigType CHOICE ⁇ periodic SEQUENCE ⁇ reportSlotConfig CSI-ReportPeriodicityAndOffset, pucch-CSI-ResourceList SEQUENCE (SIZE (1..maxNrofBWPs)) OF PUCCH-CSI-Resource ⁇ , semiPersistentOnPUCCH SEQUENCE ⁇ reportSlotConfig CSI-ReportPeriodicityAndOffset, puc
- signaling information CSI-ReportConfig contains information about each report setting.
- Information included in the signaling information CSI-ReportConfig may have the following meaning.
- - reportConfigType Indicates the time axis transmission settings and transmission channel of the channel report, and may have aperiodic transmission, semi-persistent PUCCH transmission, semi-persistent PUSCH transmission, or periodic transmission settings.
- - reportQuantity Indicates the type of channel information being reported, and the type of channel information when not transmitting a channel report ('none') and when transmitting a channel report ('cri-RI-PMI-CQI', 'cri- RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI', 'cri-RSRP', 'ssb-Index-RSRP', 'cri-RI-LI-PMI-CQI') You can have it.
- the elements included in the type of channel information are CQI (channel quality indicator), PMI (precoding matrix indicator), CRI (CSI-RS resource indicator), SSBRI (SS/PBCH block resource indicator), LI (layer indicator), RI (rank indicator), and/or L1-RSRP (Layer 1 - reference signal received power).
- CQI channel quality indicator
- PMI precoding matrix indicator
- CRI CSI-RS resource indicator
- SSBRI SS/PBCH block resource indicator
- LI layer indicator
- RI rank indicator
- L1-RSRP Layer 1 - reference signal received power
- reportFreqConfiguration Indicates whether the reported channel information includes only information about the entire band (wideband) or information about each subband. If it includes information about each subband, the subband containing the channel information Can have configuration information about
- timeRestrictionForChannelMeasurements Whether there are time axis restrictions on the reference signal for channel measurement among the reference signals referenced by the reported channel information.
- timeRestrictionForInterferenceMeasurements Whether there are time axis restrictions on the reference signal for interference measurement among the reference signals referenced by the reported channel information.
- the terminal can perform channel information reporting by referring to the above setting information included in the indicated report settings.
- the base station may instruct the UE to report CSI through RRC signaling or upper layer signaling including medium access control (MAC) control element (CE) signaling, or L1 signaling (e.g., common DCI, group-common DCI, UE-specific DCI). You can.
- RRC resource control
- CE control element
- L1 signaling e.g., common DCI, group-common DCI, UE-specific DCI.
- the base station may instruct the terminal to provide an aperiodic channel information report (CSI report) through upper layer signaling or DCI using DCI format 0_1.
- the base station sets parameters for an aperiodic CSI report of the terminal or a number of CSI report trigger states including parameters for a CSI report through upper layer signaling.
- the parameters for CSI report or CSI report trigger status are a set including the slot interval or possible slot interval between PDCCH including DCI and PUSCH including CSI report, reference signal ID for channel status measurement, and type of channel information included. It may include etc.
- Aperiodic CSI report can be triggered by the CSI request field of the aforementioned DCI format 0_1, which corresponds to the scheduling DCI for PUSCH.
- CSI-AperiodicTriggerStateList one trigger state may be triggered by a CSI request indicator.
- M CSI trigger states in the set CSI-AperiodicTriggerStateLite is greater than 2 NTs -1, according to the predefined mapping relationship, M CSI trigger states can be mapped to 2 NTs -1, and 2 One of the trigger states of NTs -1 may be indicated in the CSI request field.
- M the number of CSI trigger states in the set CSI-AperiodicTriggerStateLite is less than or equal to 2 NTs -1, one of the M CSI trigger states may be indicated in the CSI request field.
- Table 18 shows an example of the relationship between a CSI request indicator and a CSI trigger state that can be indicated by the indicator.
- the channel information reporting can be performed through PUSCH scheduled in DCI format 0_1. If 1 bit corresponding to the uplink data indicator (UL-SCH indicator) in DCI format 0_1 indicates 1, the uplink data (UL-SCH) and the acquired CSI are multiplexed on the PUSCH resource scheduled by DCI format 0_1. It can be transmitted by multiplexing. If 1 bit corresponding to the uplink data indicator (UL-SCH indicator) in DCI format 0_1 indicates 0, only CSI can be mapped and transmitted without uplink data (UL-SCH) to the PUSCH resource scheduled by DCI format 0_1. there is.
- Allocation of time axis resources for PUSCH, including the UE's CSI report can be accomplished through the slot interval with the PDCCH indicated through DCI, the start symbol and symbol length within the slot for allocation of time axis resources for PUSCH, etc.
- the location of the slot where the PUSCH containing the CSI report of the terminal is transmitted is indicated through the slot interval with the PDCCH indicated through DCI, and the start symbol and symbol length within the slot are determined by the time domain resource of the DCI described above. It is possible to indicate this through the assignment field.
- the period and slot offset of the PUSCH resource for transmitting CSI can be given based on the numerology of the UL BWP configured to transmit the CSI report.
- the base station can instruct the terminal to provide a semi-persistent CSI report transmitted on PUSCH through DCI using DCI format 0_1.
- the base station can activate or deactivate the semi-persistent CSI report transmitted on PUSCH through DCI scrambled with SP-CSI-RNTI.
- the terminal can report channel information periodically according to the set slot interval.
- the terminal can stop periodically reporting channel information that has been activated.
- the base station sets a number of CSI report trigger states including parameters for a semi-persistent CSI report or parameters for a semi-persistent CSI report of the terminal through upper layer signaling.
- the parameters for the CSI report, or the CSI report trigger state are a set containing the slot interval or possible slot interval between the PDCCH including the DCI indicating the CSI report and the PUSCH including the CSI report, and the upper layer signaling indicating the CSI report. It may include the slot interval between the activated slot and the PUSCH including the CSI report, the slot interval period of the CSI report, and the type of channel information included.
- the terminal When the base station activates some of the multiple CSI report trigger states or some of the multiple report settings to the terminal through upper layer signaling or DCI, the terminal transmits the report setting included in the indicated CSI report trigger state or the CSI set in the activated report setting.
- Channel information can be reported depending on the report settings.
- the channel information reporting can be performed through PUSCH, which is semi-persistently scheduled in DCI format 0_1 scrambled with SP-CSI-RNTI.
- the time axis resource allocation of the PUSCH, including the UE's CSI report, is determined by the slot interval period of the CSI report, the slot interval with the slot where higher layer signaling is activated, the slot interval with the PDCCH indicated through DCI, and the time axis resource allocation of the PUSCH.
- the location of the slot where the PUSCH containing the terminal's CSI report is transmitted is indicated through the slot interval with the PDCCH indicated through DCI, and the start symbol and symbol length within the slot are determined by the above-mentioned DCI format 0_1. It is possible to specify through the time domain resource assignment field.
- the base station can instruct the terminal to provide a semi-persistent CSI report transmitted on PUCCH through higher layer signaling such as MAC-CE.
- higher layer signaling such as MAC-CE
- the base station can activate or deactivate the semi-persistent CSI report transmitted on PUCCH.
- the terminal can report channel information periodically according to the set slot interval.
- the terminal can stop periodically reporting channel information that has been activated.
- the base station sets parameters for the terminal's semi-persistent CSI report through upper layer signaling.
- Parameters for the CSI report may include the PUCCH resource on which the CSI report is transmitted, the slot interval period of the CSI report, and the type of channel information included.
- the terminal can transmit the CSI report through PUCCH. Alternatively, if the PUCCH for the CSI report overlaps with the PUSCH, the CSI report can be transmitted to the PUSCH.
- the location of the PUCCH transmission slot containing the CSI report is indicated by the slot interval period of the CSI report set through higher layer signaling, the slot interval between the slot in which higher layer signaling is activated and the PUCCH containing the CSI report, and within the slot.
- the period and slot offset of the PUCCH or PUSCH resource for transmitting CSI may be given based on the numerology of the UL BWP configured to transmit the CSI report.
- the base station may instruct the terminal to periodically report CSI through higher layer signaling.
- the base station can activate or deactivate periodic CSI report through higher layer signaling including RRC signaling.
- periodic CSI report When periodic CSI report is activated, the terminal can report channel information periodically according to the set slot interval.
- periodic CSI report is deactivated the terminal can stop periodically reporting channel information that was activated.
- the base station sets report settings including parameters for the terminal's periodic CSI report through higher layer signaling.
- the parameters for CSI report are PUCCH resource settings for CSI report, slot interval between the slot where upper layer signaling instructing CSI report is activated and PUCCH including CSI report, slot interval period of CSI report, and standard for measuring channel status. It may include signal ID, type of channel information included, etc.
- the terminal can transmit the CSI report through PUCCH. Alternatively, if the PUCCH for the CSI report overlaps with the PUSCH, the CSI report can be transmitted to the PUSCH.
- the location of the slot where the PUCCH including the CSI report is transmitted is indicated by the slot interval period of the CSI report set through higher layer signaling, the slot interval between the slot in which higher layer signaling is activated and the PUCCH including the CSI report, and the slot It is possible to indicate the start symbol and symbol length within the PUCCH resource set through higher layer signaling through the allocated start symbol and symbol length.
- the period and slot offset of the PUCCH resource for transmitting CSI can be given based on the numerology of the UL BWP configured to transmit the CSI report.
- the terminal When the base station instructs the terminal to provide an aperiodic CSI report or semi-persistent CSI report through DCI, the terminal establishes a valid channel through the indicated CSI report by considering the channel computation time required for the CSI report. You can determine whether reporting can be performed.
- the terminal may report a valid CSI report starting from the uplink symbol after the Z symbol after the end of the last symbol included in the PDCCH including the DCI indicating the CSI report.
- the above-mentioned Z symbol is the numerology of the downlink BWP to which the PDCCH including the DCI indicating the CSI report corresponds, the numerology of the uplink BWP to which the PUSCH transmitting the CSI report corresponds, and the CSI report. It may vary depending on the type or characteristics of the channel information (report quantity, frequency band granularity, number of ports of the reference signal, type of codebook, etc.).
- uplink transmission of the CSI report must not be performed before the Z ref symbol, including timing advance.
- the Z ref symbol is the time from the moment the last symbol of the triggering PDCCH ends. It is an uplink symbol that starts CP (cyclic prefix).
- CP cyclic prefix
- ⁇ is It can be promised to use the largest T proc,CSI value, where ⁇ PDCCH is the subcarrier spacing used for PDCCH transmission, ⁇ CSI-RS is the subcarrier spacing used for CSI-RS transmission, and ⁇ UL is CSI reporting. It may refer to the subcarrier spacing of the uplink channel used for UCI (uplink control information) transmission. As another example, it is possible to promise to use ⁇ , which means the largest T proc,CSI value among ( ⁇ PDCCH , ⁇ UL ). For definitions of ⁇ PDCCH and ⁇ UL , refer to the description above. For convenience of future explanation, satisfying the above conditions is referred to as satisfying CSI reporting validity condition 1.
- the terminal uses the uplink symbol after the Z' symbol after the last symbol containing the reference signal ends.
- a valid CSI report can be reported, and the aforementioned Z' symbol indicates the numerology of the downlink BWP to which the PDCCH including the DCI indicating the CSI report corresponds, and the reference signal for channel measurement for the CSI report. Numerology of bandwidth, numerology of uplink BWP to which the PUSCH transmitting the CSI report corresponds, type or characteristics of channel information reported in the CSI report (report quantity, frequency band granularity, number of ports of reference signal, codebook type) etc.) may vary.
- the uplink transmission of the CSI report must be performed before the Z ref' symbol, including timing advance. should not be done.
- the Z ref' symbol is the time from the moment the last symbol of the aperiodic CSI-RS or aperiodic CSI-IM triggered by the triggering PDCCH ends. This is the uplink symbol that starts the CP.
- the detailed value of Z' follows the explanation below, , , , , , and ⁇ is numerology.
- ⁇ is It can be promised to use the largest T proc,CSI value, where ⁇ PDCCH is the subcarrier spacing used for PDCCH transmission, ⁇ CSI-RS is the subcarrier spacing used for CSI-RS transmission, and ⁇ UL is CSI reporting. It may refer to the subcarrier spacing of the uplink channel used for UCI (uplink control information) transmission. As another example, ⁇ may be promised to use the largest T proc,CSI value among ( ⁇ PDCCH , ⁇ UL ). For definitions of ⁇ PDCCH and ⁇ UL , refer to the description above. For the convenience of future explanation, satisfying the above conditions is referred to as satisfying CSI reporting validity condition 2.
- the base station instructs the UE to provide an aperiodic CSI report for an aperiodic reference signal through DCI
- the UE will receive the reference signal at the time after the Z symbol after the last symbol included in the PDCCH including the DCI indicating the CSI report.
- a valid CSI report can be performed starting from the first uplink symbol that satisfies all of the points after the Z' symbol after the last included symbol. That is, in the case of aperiodic CSI reporting based on an aperiodic reference signal, both CSI reporting validity conditions 1 and 2 must be satisfied to be considered a valid CSI report.
- the terminal may determine the CSI report to be invalid and not consider updating the channel information status for the CSI report.
- the symbols Z and Z' for calculating the above-described CSI computation time follow Tables 28 and 29 below.
- the channel information reported in the CSI report includes only wideband information
- the number of ports of the reference signal is 4 or less
- the reference signal resource is one
- the codebook type is 'typeI-SinglePanel'
- the type of channel information reported (report If quantity) is 'cri-RI-CQI'
- the Z, Z' symbols follow the Z 1 and Z 1 ' values in Table 29. In the future, this will be named delay requirement 2.
- the symbols Z and Z' are Z 1 in Table 19, It follows the value of Z 1 ' and is named delay requirement 1. The description of the above-mentioned CPU occupation is described in detail below. Additionally, when the report quantity is 'cri-RSRP' or 'ssb-Index-RSRP', the Z, Z' symbols follow the Z 3 and Z 3 ' values in Table 20. X1, X2 , X3 , and If it does not correspond to the type or characteristics of the channel information reported in the above-mentioned CSI report, the symbols Z and Z' follow the values of Z 2 and Z 2 ' in Table 20.
- TB transport block
- HARQ-ACK hybrid automatic repeat request acknowledgment
- the base station may set a CSI reference resource to determine reference time and frequency resources for the channel to be reported in the CSI report.
- the frequency of the CSI reference resource may be the carrier and subband information to measure CSI indicated in the CSI report settings, which may correspond to carrier and reportFreqConfiguration in Table 26, respectively.
- the time of the CSI standard resource can be defined based on the time at which the CSI report is transmitted. For example, when instructing to transmit CSI report # Link slot can be defined as nn CSI-ref .
- the terminal may select one of the CSI-RS resources, CSI-IM, or SSB resources associated with the CSI report.
- CSI can be reported by performing channel measurement or interference measurement on CSI-RS resources, CSI-IM resources, and SSB resources transmitted no later than the CSI reference resource slot of the CSI report transmitted in uplink slot n'.
- the CSI-RS resource, CSI-IM resource, or SSB resource connected to the corresponding CSI report refers to the CSI included in the resource set set in the resource setting referenced by the report setting for the CSI report of the terminal set through upper layer signaling.
- CSI-RS resource CSI-IM resource, SSB resource, or CSI-RS resource, CSI-IM resource, SSB resource, or reference signal referenced by the CSI report trigger state containing parameters for the corresponding CSI report (RS) It may refer to the CSI-RS resource, CSI-IM resource, or SSB resource indicated by the set ID.
- CSI-RS, CSI-IM, and SSB occasion is the transmission time of CSI-RS, CSI-IM, and SSB resource(s) determined by upper layer settings or a combination of upper layer settings and DCI triggering. It means.
- the slot to be transmitted is determined according to the slot period and slot offset set by upper layer signaling, and one of the intra-slot resource mapping methods in Table 25 according to resource mapping information (resourceMapping)
- the transmission symbol(s) within the slot is determined with reference to .
- the slot to be transmitted for the aperiodic CSI-RS resource is determined according to the slot offset with the PDCCH containing the DCI indicating channel reporting set as upper layer signaling, and the slot in Table 25 according to resource mapping information (resourceMapping) Transmission symbol(s) within a slot are determined by referring to one of the resource mapping methods.
- resource mapping information resourceMapping
- the above-mentioned CSI-RS occasion may be determined by independently considering the transmission time of each CSI-RS resource or by comprehensively considering the transmission time of one or more CSI-RS resource(s) included in the resource set, and accordingly The following two interpretations are possible for the CSI-RS occasion according to each resource set setting.
- the CSI-RS resource transmitted at the earliest time is the earliest transmitted.
- 'CSI-RS, CSI-IM, or SSB occasion for CSI report #X transmitted in uplink slot n' is in the resource setting referred to by the report setting set for CSI report #X.
- CSI-RS resources, CSI-IM resources, and CSI-RS occasion of SSB resources included in the configured resource set CSI reference resource of CSI report #X transmitted in uplink slot n' It refers to a set of CSI-RS occasion, CSI-IM occasion, and SSB occasion that are not late.
- the latest CSI-RS, CSI-IM, or SSB occasion among CSI-RS, CSI-IM, or SSB occasions for CSI report #X transmitted in 'uplink slot n' is as follows. The same two interpretations are possible.
- - Analysis 2-2 CSI-RS occasion, CSI-IM occasion, SSB occasion for CSI report #X transmitted in uplink slot n', the latest occasion among all
- the latest CSI-RS, CSI-IM, or SSB occasion among CSI-RS, CSI-IM, or SSB occasions for CSI report #X transmitted in 'uplink slot n' It is possible to consider both interpretations and apply them individually.
- the base station can direct a CSI report by considering the amount of channel information that the terminal can simultaneously calculate for the CSI report, that is, the number of channel information calculation units (CSI processing units, CPUs) of the terminal. If the number of channel information calculation units that the terminal can simultaneously calculate is N CPUs , the terminal does not expect a CSI report instruction from the base station that requires more channel information calculations than N CPUs , or requires more channel information calculations than N CPUs. The update of channel information may not be considered. N CPU can be reported by the terminal to the base station through upper layer signaling or can be set by the base station through higher layer signaling.
- CSI processing units CPUs
- the CSI report instructed by the base station to the terminal occupies some or all of the CPU for channel information calculation among the total number N CPUs of channel information that the terminal can simultaneously calculate.
- the channel information calculation unit required for each reportQuantity set in the CSI report can be set as shown in Table 21 below.
- the reportQuantity set in the CSI report is 'cri-RI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI', or 'cri-RI-LI
- the CSI report is wideband CSI and corresponds to a maximum of 4 CSI-RS ports, corresponds to a single resource without a CRI report, and the codebookType corresponds to 'typeI-SinglePanel' or the reportQuantity corresponds to 'cri-RI-CQI'.
- This case corresponds to delay requirement 1 described above, and can be viewed as a case where the terminal uses all available CPUs to quickly calculate and report the CSI
- >> K s : All cases except the above cases.
- K s indicates the number of CSI-RS resources in the CSI-RS resource set for channel measurement
- the terminal considers updating channel information for some CSI reports. You may not.
- the CSI report that does not consider the update of channel information is determined by considering at least the time that the calculation of the channel information required for the CSI report occupies the CPU and the priority of the channel information to be reported. For example, the channel information calculation required for the CSI report may not consider updating the channel information for the CSI report that starts at the latest time when the CPU is occupied, and the CSI report with low priority channel information may not be considered. It is possible not to consider updating channel information preferentially.
- the priority of the channel information can be determined by referring to Table 22 below.
- the CSI priority for CSI report is determined through the priority value Pri iCSI (y,k,c,s) in Table 22.
- the CSI priority value is the type of channel information included in the CSI report, the time axis reporting characteristics of the CSI report (aperiodic, semi-persistent, periodic), the channel on which the CSI report is transmitted (PUSCH, PUCCH), It is determined through the serving cell index and CSI report configuration index.
- the CSI priority for a CSI report compares the priority value Pri iCSI (y,k,c,s) and determines that the CSI report with a small priority value has a high CSI priority.
- CPU occupation time refers to the type of channel information included in the CSI report (report quantity) and the time of the CSI report. It is determined by considering the axis characteristics (aperiodic, semi-persistent, periodic), the slot or symbol occupied by higher layer signaling or DCI indicating a CSI report, and part or all of the slot or symbol occupied by the reference signal for channel status measurement.
- the UE receives an activation command [10, TS 38.321]; for reporting on PUSCH, the UE receives triggering on DCI Triggered by DCI; Additionally, activation command [10, TS 38.321] possible as defined in Subclause 5.2.1.5.1.
- the UE receives an activation command [10, TS 38.321]; for reporting on PUSCH, the UE receives triggering on DCI Triggered by DCI; Additionally, activation command [10, TS 38.321] possible as defined in Subclause 5.2.1.5.1. Aperiodic CSI-RS Not Supported Not Supported Triggered by DCI; Additionally, activation command [10, TS 38.321] possible as defined in Subclause 5.2.1.5.1.
- Figure 6 is a diagram showing an example of an aperiodic CSI reporting method.
- the UE can monitor the PDCCH 601 to obtain DCI format 0_1, and from this, scheduling information and CSI request information for the PUSCH 605 can be obtained.
- the terminal can obtain resource information about the CSI-RS 602 to be measured from the received CSI request indicator.
- the terminal receives DCI format 0_1 and based on the CSI resource set setting (e.g., the parameter for the offset (aperiodicTriggeringOffset described above) in the NZP CSI-RS resource set setting (NZP-CSI-RS-ResourceSet)
- the UE can determine whether measurement on the transmitted CSI-RS (602) resource should be performed, the offset value can be set, and the set offset value X may have a mapping relationship described in Table 24 below.
- aperiodicTriggeringOffset OffsetX 0 0 slot
- the UE can receive the CSI-RS (602) in the slot (corresponding to slot 0 (606) in FIG. 6) in which DCI format 0_1, which triggers aperiodic CSI reporting, is received, and sends a message to the received CSI-RS.
- the measured CSI information can be reported to the base station through PUSCH (605).
- the terminal can obtain scheduling information (information corresponding to each field of the aforementioned DCI format 0_1) for the PUSCH 605 for CSI reporting from DCI format 0_1.
- the terminal can obtain information about the slot to transmit the PUSCH (605) from the above-described time domain resource allocation information for the PUSCH (605).
- the terminal acquired the K2 value corresponding to the slot offset value for PDCCH-to-PUSCH as 3, and accordingly, when the PUSCH 605 received the PDCCH 601, slot 0 (606) ) can be transmitted in slot 3 (609), which is 3 slots away from ).
- the terminal can monitor the PDCCH 611 to obtain DCI format 0_1, and from this, scheduling information and CSI request information for the PUSCH 615 can be obtained.
- the terminal can obtain resource information about the CSI-RS 612 to be measured from the received CSI request indicator.
- the UE can receive the CSI-RS (612) in the slot (corresponding to slot 0 (616) in FIG. 6) in which DCI format 0_1, which triggers aperiodic CSI reporting, is received, and sends a message to the received CSI-RS.
- the measured CSI information can be reported to the base station through PUSCH (615).
- the aperiodic CSI report may include at least one or both of CSI part 1 or CSI part 2, and when the aperiodic CSI report is transmitted through PUSCH, it may be multiplexed with TB.
- a CRC is inserted into the input bit of the aperiodic CSI, and then after encoding and rate matching, it can be mapped to the RE in the PUSCH in a specific pattern and transmitted.
- the CRC insertion may be omitted depending on the coding method or the length of the input bits.
- the number of modulation symbols calculated for rate matching when multiplexing CSI Part 1 or CSI Part 2 included in aperiodic CSI reporting can be calculated as follows.
- the terminal can multiplex and transmit the aperiodic CSI report only in the first repetitive transmission among PUSCH repetitive transmissions.
- the aperiodic CSI reporting information that is multiplexed is encoded in a polar code method, and in this case, in order to be multiplexed when multiple PUSCH repetitions are transmitted, each PUSCH repetition must have the same frequency and time resource allocation.
- each actual repetition may have a different OFDM symbol length, so the aperiodic CSI report can be multiplexed and transmitted only for the first PUSCH repetition.
- the number of PUSCH repeated transmissions set by higher layer signaling is greater than 1. Even if it is large, the value of nominal repetition can be assumed to be 1.
- the terminal can expect the first nominal repetition to be equal to the first actual repetition.
- PUSCH transmission can be dynamically scheduled by an uplink grant (UL grant) in DCI or operated by configured grant Type 1 or Type 2.
- UL grant uplink grant
- Dynamic scheduling instructions for PUSCH transmission are possible in DCI format 0_0 or 0_1.
- Configured grant Type 1 PUSCH transmission can be set semi-statically through reception of configuredGrantConfig including rrc-ConfiguredUplinkGrant in Table 25 through higher layer signaling, without receiving a UL grant through DCI.
- Configured grant Type 2 PUSCH transmission can be semi-persistently scheduled by the UL grant in DCI after receiving configuredGrantConfig that does not include rrc-ConfiguredUplinkGrant of Table 25 through higher layer signaling.
- the parameters applied to PUSCH transmission are upper layer signaling, except for dataScramblingIdentityPUSCH, txConfig, codebookSubset, maxRank, scaling of UCI-OnPUSCH provided by pusch-Config in Table 26.
- configuredGrantConfig in Table 25 received through signaling. If the terminal is provided with the transformPrecoder in configuredGrantConfig of Table 25 through higher layer signaling, the terminal applies tp-pi2BPSK in pusch-Config of Table 26 to PUSCH transmission operated by the configured grant.
- ConfiguredGrantConfig SEQUENCE ⁇ frequencyHopping ENUMERATED ⁇ intraSlot, interSlot ⁇ OPTIONAL, -- Need S, cg-DMRS-Configuration DMRS-UplinkConfig, mcs-Table ENUMERATED ⁇ qam256, qam64LowSE ⁇ OPTIONAL, -- Need S mcs-TableTransformPrecoder ENUMERATED ⁇ qam256, qam64LowSE ⁇ OPTIONAL, -- Need S uci-OnPUSCH SetupRelease ⁇ CG-UCI-OnPUSCH ⁇ OPTIONAL, -- Need M resourceAllocation ENUMERATED ⁇ resourceAllocationType0, resourceAllocationType1, dynamicSwitch ⁇ , rbg-Size ENUMERATED ⁇ config2 ⁇ OPTIONAL, -- Need S powerControlLoopToUse ENUMERATED ⁇ n0, n1 ⁇ , p0-PUSCH-Alpha P0-PUSCH-AlphaSetId, transformPrecoder
- the DMRS antenna port for PUSCH transmission is the same as the antenna port for SRS transmission.
- PUSCH transmission may follow a codebook-based transmission method and a non-codebook-based transmission method, respectively, depending on whether the value of txConfig in pusch-Config in Table 26, which is upper layer signaling, is 'codebook' or 'nonCodebook'.
- PUSCH transmission can be scheduled dynamically through DCI format 0_0 or 0_1, and can be set semi-statically by a configured grant. If the UE is instructed to schedule PUSCH transmission through DCI format 0_0, the UE sets the pucch-spatialRelationInfoID corresponding to the UE-specific PUCCH resource corresponding to the minimum ID within the activated uplink BWP in the serving cell. Beam setup for PUSCH transmission is performed using , and at this time, PUSCH transmission is based on a single antenna port. The terminal does not expect scheduling for PUSCH transmission through DCI format 0_0 within a BWP in which a PUCCH resource including pucch-spatialRelationInfo is not set. If the terminal has not set txConfig in pusch-Config in Table 26, the terminal does not expect to be scheduled in DCI format 0_1.
- PUSCH-Config :: SEQUENCE ⁇ dataScramblingIdentityPUSCH INTEGER (0..1023) OPTIONAL, -- Need S txConfig ENUMERATED ⁇ codebook, nonCodebook ⁇ OPTIONAL, -- Need S dmrs-UplinkForPUSCH-MappingTypeA SetupRelease ⁇ DMRS-UplinkConfig ⁇ OPTIONAL, -- Need M dmrs-UplinkForPUSCH-MappingTypeB SetupRelease ⁇ DMRS-UplinkConfig ⁇ OPTIONAL, -- Need M pusch-PowerControl PUSCH-PowerControl OPTIONAL, -- Need M frequencyHopping ENUMERATED ⁇ intraSlot, interSlot ⁇ OPTIONAL, -- Need S frequencyHoppingOffsetLists SEQUENCE (SIZE (1..4)) OF INTEGER (1..4)) OF INTEGER (1..
- maxNrofPhysicalResourceBlocks-1) OPTIONAL --Need M resourceAllocation ENUMERATED ⁇ resourceAllocationType0, resourceAllocationType1, dynamicSwitch ⁇ , pusch-TimeDomainAllocationList SetupRelease ⁇ PUSCH-TimeDomainResourceAllocationList ⁇ OPTIONAL, -- Need M pusch-AggregationFactor ENUMERATED ⁇ n2, n4, n8 ⁇ OPTIONAL, -- Need S mcs-Table ENUMERATED ⁇ qam256, qam64LowSE ⁇ OPTIONAL, -- Need S mcs-TableTransformPrecoder ENUMERATED ⁇ qam256, qam64LowSE ⁇ OPTIONAL, -- Need S transformPrecoder ENUMERATED ⁇ enabled, disabled ⁇ OPTIONAL, -- Need S codebookSubset ENUMERATED ⁇ fullyAndPartialAndNonCoherent, partialAndNonCoherent,nonCoherent ⁇ OPTIONAL, --Con
- Codebook-based PUSCH transmission can be dynamically scheduled through DCI format 0_0 or 0_1 and can be set to operate semi-statically by a configured grant.
- the terminal uses an SRS resource indicator (SRI) and a transmission precoding matrix indicator (TPMI). ), and determine a precoder for PUSCH transmission based on the transmission rank (number of PUSCH transmission layers).
- SRI SRS resource indicator
- TPMI transmission precoding matrix indicator
- SRI can be given through a field SRS resource indicator in DCI or set through srs-ResourceIndicator, which is higher layer signaling.
- the terminal receives at least one SRS resource when transmitting a codebook-based PUSCH, and can receive up to two settings.
- the SRS resource indicated by the SRI refers to an SRS resource corresponding to the SRI among SRS resources transmitted before the PDCCH containing the SRI.
- TPMI and transmission rank can be given through the field precoding information and number of layers in DCI, or can be set through precodingAndNumberOfLayers, which is higher layer signaling. TPMI is used to indicate the precoder applied to PUSCH transmission.
- TPMI is used to indicate the precoder to be applied in one configured SRS resource. If the terminal receives multiple SRS resources, TPMI is used to indicate the precoder to be applied in the SRS resource indicated through SRI.
- the precoder to be used for PUSCH transmission is selected from the uplink codebook with the number of antenna ports equal to the nrofSRS-Ports value in SRS-Config, which is higher layer signaling.
- the UE determines the codebook subset based on TPMI and codebookSubset in pusch-Config, which is upper layer signaling.
- the codebookSubset in pusch-Config, which is upper layer signaling can be set to one of 'fullyAndPartialAndNonCoherent', 'partialAndNonCoherent', or 'nonCoherent' based on the UE capabilities reported by the UE to the base station.
- the terminal does not expect the value of codebookSubset, which is upper layer signaling, to be set to 'fullyAndPartialAndNonCoherent'. Additionally, if the terminal reports 'nonCoherent' as a terminal capability, the terminal does not expect the value of codebookSubset, which is upper layer signaling, to be set to 'fullyAndPartialAndNonCoherent' or 'partialAndNonCoherent'.
- the terminal can receive one SRS resource set whose usage value within the SRS-ResourceSet, which is upper layer signaling, is set to 'codebook', and within the SRS resource set, one SRS resource is indicated through SRI. It can be. If several SRS resources are set in an SRS resource set where the usage value in the upper layer signaling SRS-ResourceSet is set to 'codebook', the terminal sets the value of nrofSRS-Ports in the upper layer signaling SRS-Resource for all SRS resources. Expect the same value to be set.
- the terminal transmits one or more SRS resources included in the SRS resource set with the usage value set to 'codebook' to the base station according to upper layer signaling, and the base station selects one of the SRS resources transmitted by the terminal and Instructs the terminal to perform PUSCH transmission using the transmission beam information of the SRS resource.
- SRI is used as information to select the index of one SRS resource, and SRI can be included in DCI.
- the base station includes information indicating the TPMI and rank that the terminal will use for PUSCH transmission in the DCI.
- the terminal uses the SRS resource indicated by the SRI and performs PUSCH transmission by applying the rank indicated based on the transmission beam of the SRS resource and the precoder indicated by TPMI.
- Non-codebook-based PUSCH transmission can be scheduled dynamically through DCI format 0_0 or 0_1, and can be set to operate semi-statically by a configured grant. If at least one SRS resource is set in the SRS resource set where the usage value in the SRS-ResourceSet, which is upper layer signaling, is set to 'nonCodebook', the terminal can receive non-codebook-based PUSCH transmission scheduled through DCI format 0_1.
- the terminal can receive one NZP CSI-RS resource (non-zero power CSI-RS) connected to an SRS resource set whose usage value in the SRS-ResourceSet is set to 'nonCodebook'.
- the terminal can perform calculations on the precoder for SRS transmission through measurement of the NZP CSI-RS resource connected to the SRS resource set. If the difference between the last received symbol of the aperiodic NZP CSI-RS resource connected to the SRS resource set and the first symbol of the aperiodic SRS transmission from the terminal is less than 42 symbols, the terminal sends the precoder for SRS transmission. We do not expect the information to be updated.
- the connected NZP CSI-RS is indicated by SRS request, a field in DCI format 0_1 or 1_1.
- the connected NZP CSI-RS resource is an aperiodic NZP CSI-RS resource and the value of the field SRS request in DCI format 0_1 or 1_1 is not '00', the NZP CSI-RS connected to the SRS resource set It can indicate the existence of .
- the DCI must not indicate cross-carrier or cross-BWP scheduling.
- the NZP CSI-RS is located in the slot in which the PDCCH including the SRS request field was transmitted. At this time, the TCI states set in the scheduled subcarrier are not set to QCL-TypeD.
- the connected NZP CSI-RS can be indicated through the associatedCSI-RS in the SRS-ResourceSet, which is upper layer signaling.
- the terminal does not expect spatialRelationInfo, which is upper layer signaling for the SRS resource, and associatedCSI-RS in SRS-ResourceSet, which is higher layer signaling, to be set together.
- a terminal When a terminal receives a plurality of SRS resources, it can determine the precoder and transmission rank to be applied to PUSCH transmission based on the SRI indicated by the base station. At this time, the UE can receive SRI indication through a field SRS resource indicator in the DCI or be configured through srs-ResourceIndicator, which is higher layer signaling. Similar to the codebook-based PUSCH transmission described above, when the terminal receives an SRI through DCI, the SRS resource indicated by the SRI is the SRS resource corresponding to the SRI among the SRS resources transmitted before the PDCCH containing the SRI. means.
- the terminal can use one or multiple SRS resources for SRS transmission, and the maximum number of SRS resources that can be simultaneously transmitted in the same symbol within one SRS resource set and the maximum number of SRS resources are determined by the terminal capabilities reported by the terminal to the base station. It is decided. At this time, SRS resources simultaneously transmitted by the terminal occupy the same RB.
- the terminal sets one SRS port for each SRS resource. Only one SRS resource set with the usage value in SRS-ResourceSet, which is upper layer signaling, is set to 'nonCodebook' can be set, and up to four SRS resources for non-codebook-based PUSCH transmission can be set.
- the base station transmits one NZP-CSI-RS connected to the SRS resource set to the terminal, and the terminal transmits one or more SRS resources in the corresponding SRS resource set based on the results measured when receiving the corresponding NZP-CSI-RS. Calculate the precoder to use when transmitting.
- the terminal applies the calculated precoder when transmitting one or more SRS resources in the SRS resource set whose usage is set to 'nonCodebook' to the base station, and the base station transmits one or more of the one or more SRS resources received.
- Select SRS resource At this time, in non-codebook-based PUSCH transmission, SRI represents an index that can express a combination of one or multiple SRS resources, and the SRI is included in DCI.
- the number of SRS resources indicated by the SRI transmitted by the base station can be the number of transmission layers of the PUSCH, and the terminal transmits the PUSCH by applying the precoder applied to SRS resource transmission to each layer.
- upper layer signaling may be signaling corresponding to at least one or a combination of one or more of the following signalings.
- L1 signaling may be signaling corresponding to at least one or a combination of one or more of the following physical layer channels or signaling methods.
- DCI e.g. DCI used for scheduling downlink or uplink data
- Non-scheduling DCI (e.g. DCI not for the purpose of scheduling downlink or uplink data)
- a method for reporting subband channel state information in a wireless communication system will be described. If the terminal performs partial band channel state information reporting, upper layer signaling determines which partial band the channel state information for will be reported by the terminal through csi-ReportingBand set in CSI-ReportConfig, which is upper layer signaling defined in Table 17 above. It can be set quasi-statically from the base station.
- - csi-ReportingBand which is upper layer signaling, is not set when the size of the BWP is smaller than 24 PRB, and can be set when the BWP is larger than or equal to 24 PRB.
- bitmaps with a length of 3 to 19 can be selected, and the length of the bitmap is determined by the relationship between the size of the partial band indicated by each bit in the bitmap and the size of the BWP, which will be described later. It can be decided through
- the size of the subband indicated by each bit in the bitmap can be selected as one of value1 and value2 depending on subbandSize, which is upper layer signaling, and value1 and value2 can be varied depending on the size of the BWP, that is, the total number of RBs in the BWP. there is.
- value1 and value2 can be 4 and 8 PRBs, respectively, and if the total number of RBs in BWP is from 73 to 144, value1 and value2 can be respectively It can be 8 and 16 PRBs, and if the total number of RBs in the BWP is 145 to 275, value1 and value2 can be 16 and 32 PRBs, respectively.
- the number of is 18, and when the size of the BWP is 275 PRBs, in the case of a 16 PRB with value 1, the number of partial bands that can be expressed is 18 if the start CRB value of the BWP is divided by the size of the partial band, if the BWP If the starting CRB value is not divisible by the size of the partial band, it can be 19, so as described above, the length of the bitmap can be from a minimum of 3 to a maximum of 19, and one of them can be selected.
- a bit at an arbitrary position in the bitmap may have a bit value of 0 or 1, and if the value of a bit at an arbitrary position within the bitmap is 1, the terminal provides partial band channel state information for the corresponding partial band. This may mean that a report must be made. As the value of each bit in the bitmap becomes 0 or 1, the terminal can report partial band channel state information for a set of continuous or discontinuous partial bands within the BWP.
- the terminal calculates the wideband PMI and CQI by considering all subbands corresponding to the value of 1 in the bitmap and reports it to the base station. can do. If the terminal is set to report partial-band PMI and CQI through higher layer signaling, the terminal can calculate the partial-band PMI and CQI for each partial band corresponding to the value of 1 in the bitmap and report it to the base station. .
- the UE If the UE is configured to report partial-band PMI and CQI through upper layer signaling, and the channel state information report is divided into two parts (two part CSI), the UE reports the second part of the channel state information (CSI part 2). Partial-band channel state information may be included within it, and the order of information included may be as follows.
- odd subbands are sorted in ascending order
- odd subbands are sorted in ascending order
- the terminal can decide based on the values of 1 in the csi-ReportingBand bitmap described above. Therefore, if different terminals are configured with csi-ReportingBand bitmaps of the same length, and the values of the two bitmaps are different, depending on the '1' value of the two bitmaps, even if they are the same bit position in the two bitmaps, the two bitmaps are different.
- the index of the partial band used by the terminal to report channel status may be allocated differently. Because of this, even-numbered and odd-numbered subbands may also vary depending on the bitmap.
- the terminal determines the subband as partial band 0 because the rightmost ‘1’ in the bitmap corresponds to the subband of the lowest frequency.
- partial band indexes can be sequentially assigned to the partial bands corresponding to the remaining '1'.
- the terminal can assign partial band indexes in ascending order from right to left for the position of ‘1’ in the bitmap. Therefore, according to the bitmap, eight partial band indexes from partial bands 0 to 7 can be assigned to the partial band corresponding to 1 in the bitmap, and corresponding to the two '0' bits in the middle. For a partial band, a corresponding partial band index may not exist.
- the terminal can determine the index of the partial band based on the absolute position of the bits in the csi-ReportingBand bitmap described above. Therefore, if different terminals are configured with csi-ReportingBand bitmaps of the same length, and even if the values of the two bitmaps are different, if the same bit position within the two bitmaps has the value '1', the bit at that position The same partial band index may be assigned to the two terminals in the corresponding partial band. Because of this, the even-numbered and odd-numbered subbands are already determined regardless of the bitmap, and the '1' in the bitmap can determine which subband the channel state information for will be reported.
- the terminal can perform partial band channel status reporting for partial bands 0, 1, 3, 4, 5, 7, 8, and 9.
- the terminal can allocate partial band indices 2 and 6 for the two ‘0’ bit positions in the middle, but the partial band corresponding to 0 is not used to report partial band channel status information.
- indexing methods 1 and 2 above are only examples, and partial band indexes are assigned in descending order, or indexes are assigned from the partial band of the highest frequency band, or starting from the partial band corresponding to the leftmost '1' in the bitmap. At least one obvious variant is possible, such as assigning a partial band index.
- FIG. 7 is a diagram illustrating an example of a method for allocating a partial band index when reporting partial band channel state information according to the present disclosure.
- the csi-Reporting bitmap is set to 1011101110 (700).
- the index of the partial band is determined based only on the position in the bitmap to which the value '1' is assigned, so the even-numbered partial bands are B, D, G, J, odd-numbered subbands can be determined as C, F, and H (703).
- the index of the partial band is determined based on the absolute position of the bit in the bitmap regardless of the value of '1' or '0', so the even-numbered partial bands are C, G , the odd-numbered subbands can be determined as B, D, F, H, and J (704).
- a to J represent the position on the frequency of the partial band within the BWP. For example, if the size of the BWP is 80 PRB and the size of the partial band is determined to be 8 PRB through higher layer signaling, A is PRB 0 to It represents the frequency range of 7, and J can represent the frequency range of PRB 72 to 79.
- partial band index allocation may vary depending on which indexing method is used, and the even and odd partial bands may vary accordingly. Therefore, when reporting the above-described partial band channel status information, information on the even-numbered and odd-numbered partial bands may be allocated differently and reported to the base station.
- the UE generates partial-band channel state reporting information through [Indexing Method 1] and the base station decodes and interprets the partial-band channel state reporting information reported from the UE based on [Indexing Method 2], the partial-band A situation may arise where there is a mismatch between the base station and the terminal between the channel state reporting information.
- the different entities within a given BWP we describe various methods that can harmonize the understanding of partial-band channel state reporting information even if they use different indexing methods. Basically, through the various methods below, the indexes assigned to the sub-bands themselves can be made to be the same, or the even-numbered and odd-numbered sub-bands, which are the basis for reporting the partial-band channel status information, can be made to be the same, although the partial-band indexes are different. .
- the base station can set a bitmap so that the base station and the terminal can use it for partial-band channel status reporting based on the same partial-band indexing.
- the terminal can expect to receive a bitmap set so that the base station and the terminal can use it to report partial-band channel state information based on the same partial-band indexing.
- the base station can set a bitmap to the terminal so that the base station and the terminal can use the same even-numbered and odd-numbered partial bands for partial-band channel status reporting.
- the terminal can expect to receive a bitmap set so that the base station and the terminal can use the same even-numbered and odd-numbered partial bands for partial-band channel status reporting.
- the base station allows the base station and the terminal to use the same even-numbered and odd-numbered subbands for partial-band channel status reporting, even if the base station and the terminal have different understanding of the partial-band index. You can set a bitmap to the terminal.
- the terminal allows the base station and the terminal to use the same even-numbered and odd-numbered subbands for partial-band channel status reporting, even if the base station and the terminal have different understanding of the partial band index. You can expect to receive a bitmap setup.
- the base station can set a csi-ReportingBand bitmap in which all bits are '1' to the terminal. . Since the terminal cannot know whether the base station and the terminal have the same or different understanding of how to determine the partial band index, it can expect to receive a csi-ReportingBand bitmap with all bits '1' from the base station. there is. Through this, the terminal can expect that the base station and the terminal have the same understanding of the partial band index.
- FIG. 8 is a diagram illustrating an example of a method in which the same operation can be derived between different partial-band channel state information reporting methods according to the present disclosure.
- the csi-Reporting bitmap is set to 1111111111 (800).
- the index of the partial band is determined only based on the position where the value '1' is assigned, so the even-numbered partial bands are A, C, E, G, I, Odd subbands can be determined as B, D, F, H, and J (803).
- the index of the partial band is determined based on the absolute position of the bit in the bitmap regardless of the value of '1' or '0', so the even-numbered partial bands are A, C , E, G, I, and the odd-numbered subbands can be determined as B, D, F, H, and J (804).
- the band index may be set to be the same, and the understanding of the even-numbered and odd-numbered partial band indices of the terminal and the base station may also be the same.
- the base station Since the base station cannot know whether the base station and the terminal have the same or different understanding of how to determine the partial band index, the base station sends the terminal to the csi-ReportingBand bitmap with consecutive '1's starting from the rightmost bit. You can set a bitmap with a value. Since the terminal cannot know whether the base station and the terminal have the same or different understanding of how to determine the partial band index, a csi-ReportingBand bitmap with continuous '1' values starting from the rightmost bit is received from the base station. You can expect to be set up.
- FIG. 9 is a diagram illustrating another example of a method in which the same operation can be achieved between different partial-band channel state information reporting methods according to the present disclosure.
- the csi-Reporting bitmap is set to 0000011111 (900).
- the index of the partial band is determined only based on the position to which the value '1' is assigned, so the even-numbered partial bands are A, C, and E, and the odd-numbered partial bands are can be determined as B and D (903).
- the index of the partial band is determined based on the absolute position of the bit in the bitmap regardless of the value of '1' or '0', so the even-numbered partial bands are A, C , E, and the odd-numbered subbands can be determined as B and D (904).
- bits from the rightmost bit are '1', so either [Indexing Method 1], which determines the index of the partial band by relative position, or [Indexing Method 2], which determines the index by absolute position, is used.
- the sub-band index for a specific sub-band may be set to be the same, and the understanding of the even-numbered and odd-numbered sub-band indices of the terminal and the base station may also be the same.
- the base station Since the base station cannot know whether the base station and the terminal have the same or different understanding of how to determine the partial band index, the base station sets the corresponding bit to 1 for the csi-ReportingBand bitmap to be transmitted to the terminal. So that the lowest subband can be the even-numbered subband, an even number of consecutive '0's can be set at the rightmost bit position, and consecutive '1's can be set from the left bit position.
- the terminal can expect to have the bitmap set so that the lowest sub-band becomes the even-numbered sub-band for the csi-ReportingBand bitmap received from the base station. In other words, the terminal can expect to receive an even number of consecutive ‘0’s set at the rightmost bit position of the csi-ReportingBand bitmap from the base station, and consecutive ‘1’s set from the left bit position.
- the terminal can expect to have the same understanding of the even and odd partial bands as the base station when interpreting the csi-ReportingBand bitmap based on [Indexing Method 1] and [Indexing Method 2].
- the terminal receives a csi-ReportingBand bitmap from the base station and interprets the bitmap based on [Indexing Method 1] and [Indexing Method 2]
- the frequency positions of the even-numbered subbands are the same regardless of which method is used.
- the bit position of the first ‘1’ from the right of the bitmap is the 1st, 3rd, 5th, etc. from the right of the bitmap. As such, it can be expected to be set to exist in the odd bit position.
- FIG. 10 is a diagram illustrating another example of a method in which the same operation can be achieved between different partial-band channel state information reporting methods according to the present disclosure.
- the csi-Reporting bitmap is set to 0011111100 (1000).
- the index of the partial band is determined only based on the position to which the value '1' is assigned, so the even-numbered partial bands are C, E, and G, and the odd-numbered partial bands are can be determined by D, F, and H (1003).
- the index of the partial band is determined based on the absolute position of the bit in the bitmap regardless of the value of '1' or '0', so the even-numbered partial bands are C, E , G, and the odd-numbered subbands can be determined as D, F, and H (1004).
- the bitmap an even number of consecutive '0's are set at the rightmost bit position, so although the index of the even-numbered subband of the lowest frequency is not the same according to the two indexing methods, the frequency of the lowest even-numbered subband is The location may be the same. Therefore, according to [Indexing Method 1] and [Indexing Method 2], the partial band indexes for frequency location C are 0 and 2, respectively, but the two partial band indices are used by the terminal to report partial band channel state information through the corresponding bitmap. In this case, it can be the lowest even subband index.
- the sub-band indexes for frequency position D in [Indexing Method 1] and [Indexing Method 2] are 1 and 3, respectively, but the two sub-band indexes are used by the terminal to report partial-band channel state information through the corresponding bitmap. In this case, it may be the lowest odd subband index.
- the PMI and CQI information of the even-numbered sub-band are generated and reported sequentially in ascending order from the lowest index for the even-numbered sub-bands, so even if the sub-band indexes are different, the even-numbered and Since the frequency position of the sub-band corresponding to the odd-numbered sub-band index is the same, even if the base station and the terminal use different indexing methods, the understanding of the information generated when reporting partial-band channel status information and its interpretation can be consistent.
- the terminal Since the base station cannot know whether the base station and the terminal have the same or different understanding of how to determine the partial band index, the terminal The bit positions of '1' shown as are 1st, 3rd, 5th,... from the right of the bitmap. As such, it can be expected to be set to exist in the odd bit position. Additionally, if the base station wants to set up discontinuous partial-band channel status information reporting to the terminal, the base station sends an even number of consecutive '0's to the left starting from the position of the first '1' that appears from the far right of the bitmap to be transmitted to the terminal. You can set it up.
- the terminal receives an even number of consecutive '0's from the base station, starting from the position of the first '1' appearing on the rightmost side of the bitmap. ' can be expected to be set. Additionally, the terminal does not expect to receive an odd number of consecutive '0's from the base station, starting from the position of the first '1' appearing from the rightmost part of the bitmap to the left.
- the terminal can be expected to have an understanding of the even and odd subbands, which are the same as the base station, when interpreting the csi-ReportingBand bitmap based on [Indexing Method 1] and [Indexing Method 2]. .
- the terminal receives a csi-ReportingBand bitmap from the base station and interprets the bitmap based on [Indexing Method 1] and [Indexing Method 2], the frequency positions of the even-numbered subbands are the same, and the frequency positions of the odd-numbered subbands are the same. It can be expected that the frequency positions are the same.
- FIG. 11 is a diagram illustrating another example of a method in which the same operation can be achieved between different partial-band channel state information reporting methods according to the present disclosure.
- the csi-Reporting bitmap is set to 1001001001 (1100).
- the index of the partial band is determined using only the position to which the value '1' is assigned, so the even-numbered partial bands are A and G, and the odd-numbered partial bands are D. , can be determined as J (1103).
- the index of the partial band is determined based on the absolute position of the bit in the bitmap regardless of the value of '1' or '0', so the even-numbered partial bands are A, G , the odd-numbered partial bands can be determined as D and J (1104).
- the bit position of ‘1’ that appears first from the right of the bitmap is the 1st, 3rd, 5th, ... from the right of the bitmap.
- the frequency position of the subband with the lowest even-numbered index is set to be the same. It can be. Therefore, when following [Indexing Method 1] and [Indexing Method 2], the partial band index for frequency position A is the same as 0, but even though the partial band index at frequency position G is different as 2 and 6, respectively, the same frequency position is the same. It may correspond to the even-numbered subband.
- the partial band indexes for the frequency position D are 1 and 3, respectively, but the two partial band indices allow the terminal to provide partial band channel state information through the corresponding bitmap. When reporting, it may be the lowest odd-numbered subband index.
- FIG. 12 is a diagram illustrating another example of a method in which the same operation can be achieved between different partial-band channel state information reporting methods according to the present disclosure.
- the csi-Reporting bitmap is set to 1100001100 (1200).
- the index of the partial band is determined only based on the position where the value '1' is assigned, so the even-numbered partial band is C and I, and the odd-numbered partial band is D. , can be determined as J (1203).
- the index of the partial band is determined based on the absolute position of the bit in the bitmap regardless of the value of '1' or '0', so the even-numbered partial bands are C, I , the odd-numbered partial bands can be determined as D and J (1204).
- bit position of '1' which first appears from the right of the bitmap, is at the 3rd, that is, the odd bit position from the right of the bitmap, so even though both indexing methods are used, the bit position of '1' is at the even-numbered bit position of the lowest frequency.
- the indices of the sub-bands cannot be the same, the frequency positions of the lowest even-numbered sub-bands can be set to be the same. Therefore, according to [Indexing Method 1] and [Indexing Method 2], the subband indices for the frequency position C are different as 0 and 2, respectively, but the same frequency position may correspond to the same even-numbered subband.
- the partial band index for the frequency position D is 1 and 3, respectively, but the two partial band indexes allow the terminal to provide partial band channel state information through the corresponding bitmap. When reporting, it may be the odd subband index of the lowest frequency.
- the terminal and the base station determine the index of the partial band on which to report channel state information based on one of the above-described [Indexing Method 1] or [Indexing Method 2].
- terminals and base stations that support 5G NR index partial bands based on one of [Indexing Method 1] or [Indexing Method 2], regardless of which version (release) of the corresponding NR function is used. can be decided.
- terminals and base stations that support 5G NR index the partial band based on either [Indexing Method 1] or [Indexing Method 2] depending on which version (release) of the corresponding NR function is used. You can decide.
- the index of the partial band can be determined based on [Indexing Method 1], and for terminals and base stations that support Release 17 and later, [Indexing Method 2] ] Based on this, the index of the partial band can be determined.
- the base station restrictively provides csi-ReportingBand setting information, which is upper layer signaling, to the terminal based on the above-described [Bitmap determination method 1] to [Bitmap determination method 4] to ensure understanding between different indexing methods. You can.
- the base station can distinguish the manufacturer of a specific terminal in an implementation method, and it can be assumed that one of two indexing methods is used for each terminal manufacturer. there is. For example, if the base station can determine the manufacturer of a specific terminal, and if the manufacturer assumes [indexing method 1], the base station must explicitly specify which indexing method the terminal uses when determining the partial band index. Even if signaling is not reported to the base station, it can be assumed that the corresponding terminal determines the index of the partial band based on [Indexing Method 1].
- the base station uses the indexing method assumed by the manufacturer. It can work. Otherwise, the base station restrictively provides the csi-ReportingBand setting information, which is upper layer signaling, to the terminal based on the above-described [Bitmap determination method 1] to [Bitmap determination method 4] to ensure understanding between different indexing methods. You can.
- the base station and the terminal operate using one of the two indexing methods as described above, the following operations may be possible.
- the terminal can assume that the base station and the terminal determine the index of the partial band based on [Indexing Method 1] described above. That is, the terminal can determine the partial band at the rightmost '1' position among the csi-ReportingBand bitmaps set by upper layer signaling as the partial band at the lowest index (i.e. partial band 0), and start from the rightmost bit of the bitmap.
- the index of the partial band can be determined in ascending order using bits with the value '1' to the left.
- the base station can assume that the terminal and the base station determine the index of the partial band based on [Indexing Method 1] described above. That is, the base station can determine the partial band at the rightmost '1' position among the csi-ReportingBand bitmaps set to the terminal through upper layer signaling as the partial band with the lowest index (i.e., partial band 0), and the rightmost band of the bitmap
- the index of the partial band can be determined in ascending order using bits with the value '1' from the bit to the left.
- the terminal can assume that the base station and the terminal determine the index of the partial band based on [Indexing Method 2] described above.
- the terminal uses the partial band at the rightmost bit position among the bits in the bitmap as the part with the lowest index.
- the band i.e., partial band 0
- the index of the partial band can be determined in ascending order from the rightmost bit of the bitmap to the left.
- the base station can assume that the terminal and the base station determine the index of the partial band based on [Indexing Method 2] described above.
- the base station uses the partial band at the rightmost bit position among the bits in the bitmap at the lowest index, regardless of whether the value of each bit of the csi-ReportingBand bitmap set to the terminal through upper layer signaling is '0' or '1'. It is determined as a partial band (i.e., partial band 0), and the index of the partial band can be determined in ascending order from the rightmost bit of the bitmap to the left.
- the terminal may perform a terminal capability report informing the base station that a specific method is available.
- the terminal may report that the terminal is implemented in one of the two methods for the above-described [Indexing Method 1] or [Indexing Method 2], or may perform a terminal capability report indicating that implementation of both methods is possible.
- the base station may report the UE to the base station using [Indexing Method 1] or [Indexing Method 2].
- the base station receiving it also implements the early implementable function. If equipped with a function that can interpret the implementable function, the base station can check which of the two indexing methods the corresponding terminal assigns a partial band index to, and based on this information, determines the [bitmap] for the corresponding terminal.
- One of [Method 1] to [Bitmap determination method 5] can be supported.
- the terminal reports to the base station any terminal capabilities among the Release 17 functions other than explicit signaling for the above two indexing methods, or the base station can know the version of the terminal, that is, the base station can release the terminal If the information can be obtained and the version is Release 17, the base station can assume that the terminal supports one of [Indexing Method 1] or [Indexing Method 2] (for example, [Indexing Method 1] is supported can be assumed), and a restricted operation using one of the above-described [Bitmap determination method 1] to [Bitmap determination method 4] can be performed.
- the base station may assume that the terminal supports one of [Indexing Method 1] or [Indexing Method 2] (example (can be assumed to support [Indexing method 1]), additional upper layer signaling can be set for each terminal, and the corresponding upper layer signaling operates as [Indexing method 1] when the terminal reports partial band channel status information, or This may mean that one of three cases in total is performed: operating with [Indexing Method 2], or operating restrictively using one of the above-described [Bitmap Determination Method 1] to [Bitmap Determination Method 4]. .
- FIG. 13A is a diagram illustrating an example of an operation performed by a terminal according to an embodiment of the present disclosure.
- the terminal may transmit terminal capabilities to the base station (1301).
- terminal capabilities may follow the above-mentioned information.
- the terminal capability may express specific features of Release 15, 16, or higher for 5G NR support, and support one or both of [Indexing Method 1] or [Indexing Method 2] described above. It may be a terminal capability, or it may include all of these.
- the terminal can receive higher layer signaling from the base station (1302).
- the terminal can receive csi-ReportingBand, which is upper layer signaling for reporting partial band channel status information, and the csi-ReportingBand is based on the above-described [Bitmap determination method 1] to [Bitmap determination method 5].
- the base station can generate it.
- the terminal can receive a reference signal from the base station (1303) and generate partial-band channel state information based on the channel state information measured using the reference signal (1304). At this time, the terminal can generate channel state information for the partial band indicated by the corresponding csi-ReportingBand bitmap by assuming one of the above-described [Indexing Method 1] or [Indexing Method 2]. Afterwards, the terminal can report partial-band channel state information to the base station (1305). At least one of the steps described above may be omitted, or other steps may be added or the order may be changed to perform the present invention.
- FIG. 13B is a diagram illustrating an example of an operation performed by a base station according to an embodiment of the present disclosure.
- the base station can receive terminal capabilities transmitted by the terminal (1351).
- terminal capabilities may follow the above-mentioned information.
- the terminal capability may express specific features of Release 15, 16, or higher for 5G NR support, and support one or both of [Indexing Method 1] or [Indexing Method 2] described above. It may be a terminal capability, or it may include all of these.
- the base station can transmit higher layer signaling to the terminal (1352).
- the base station may transmit csi-ReportingBand, which is upper layer signaling for reporting partial band channel status information, to the terminal, and the corresponding csi-ReportingBand uses the above-described [Bitmap determination method 1] to [Bitmap determination method 5].
- the base station can be created. Afterwards, the base station can transmit a reference signal to the terminal (1353), and the base station can receive partial band channel state information generated by the terminal by receiving the corresponding reference signal (1354). At this time, the base station can decode and decode the partial-band channel state information received from the terminal, and when interpreting the partial-band channel state information, one of the above-described [Indexing Method 1] or [Indexing Method 2] is applied. It can be interpreted by assuming (1355). That is, the base station can check for which partial band the received partial band channel state information is based on indexing method 1 or indexing method 2 described above. At least one of the steps described above may be omitted, or other steps may be added or the order may be changed to perform the present invention.
- Figure 14 is a block diagram showing the structure of a terminal according to an embodiment of the present disclosure.
- the terminal may include a transceiver 1401, a memory 1402, and a processor 1403.
- the components of the terminal are not limited to the examples described above.
- the terminal may include more or fewer components than the aforementioned components.
- at least part or all of the transceiver 1401, memory 1402, and processor 1403 may be implemented in the form of a single chip.
- the transceiver 1401 can transmit and receive signals to and from a base station.
- the above-described signals may include control information and data.
- the transceiver 1401 may be composed of an RF transmitter that up-converts and amplifies the frequency of the transmitted signal, and an RF receiver that amplifies the received signal with low noise and down-converts the frequency. Additionally, the transceiver 1401 may receive a signal through a wireless channel and output it to the processor 1403, and transmit the signal output from the processor 1403 through a wireless channel.
- the memory 1402 may store programs and data necessary for operation of the terminal. Additionally, the memory 1402 may store control information or data included in signals transmitted and received by the terminal.
- the memory 1402 may be composed of a storage medium such as ROM, RAM, hard disk, CD-ROM, and DVD, or a combination of storage media. Additionally, the memory 1402 may be composed of a plurality of memories. According to one embodiment, the memory 1402 may store a program for executing operations for measuring and reporting channel state information of the terminal.
- the processor 1403 may control a series of processes in which the terminal can operate according to the above-described embodiments of the present disclosure.
- the processor 1403 executes a program stored in the memory 1402 to receive setting information for channel state information measurement from the base station and control channel state information measurement and reporting operations based on the setting information. You can.
- Figure 15 is a block diagram showing the structure of a base station according to an embodiment of the present disclosure.
- the base station may include a transceiver 1501, a memory 1502, and a processor 1503.
- the components of the base station are not limited to the above examples.
- the terminal may include more or fewer components than the aforementioned components.
- the transceiver 1501, memory 1502, and processor 1503 may be implemented in the form of a single chip.
- the transceiver 1501 can transmit and receive signals to and from a terminal.
- the above-described signals may include control information and data.
- the transceiver 1501 may be composed of an RF transmitter that up-converts and amplifies the frequency of the transmitted signal, and an RF receiver that amplifies the received signal with low noise and down-converts the frequency. Additionally, the transceiver 1501 may receive a signal through a wireless channel and output it to the processor 1503, and transmit the signal output from the processor 1503 through a wireless channel.
- the memory 1502 may store programs and data necessary for operation of the terminal. Additionally, the memory 1502 may store control information or data included in signals transmitted and received by the terminal.
- the memory 1502 may be composed of a storage medium such as ROM, RAM, hard disk, CD-ROM, and DVD, or a combination of storage media. Additionally, the memory 1502 may be composed of a plurality of memories. According to one embodiment, the memory 1502 may store a program for executing an operation for reporting channel state information of the terminal.
- the processor 1503 may control a series of processes so that the base station can operate according to the above-described embodiment of the present disclosure.
- the processor 1503 executes a program stored in the memory 1502 to transmit setting information for measuring channel state information to the terminal and control the operation of receiving channel state information according to the setting information.
- a computer-readable storage medium or computer program product that stores one or more programs (software modules) may be provided.
- One or more programs stored in a computer-readable storage medium or computer program product are configured to be executable by one or more processors in an electronic device (configured for execution).
- One or more programs include instructions that cause the electronic device to execute methods according to embodiments described in the claims or specification of the present disclosure.
- These programs include random access memory, non-volatile memory including flash memory, read only memory (ROM), and electrically erasable programmable ROM.
- EEPROM Electrically Erasable Programmable Read Only Memory
- magnetic disc storage device Compact Disc-ROM (CD-ROM: Compact Disc-ROM), Digital Versatile Discs (DVDs), or other types of It can be stored in an optical storage device or magnetic cassette. Alternatively, it may be stored in a memory consisting of a combination of some or all of these. Additionally, a plurality of each configuration memory may be included.
- the program can be accessed through a communication network such as the Internet, Intranet, LAN (Local Area Network), WLAN (Wide LAN), or SAN (Storage Area Network), or a combination of these. It may be stored in an attachable storage device that can be accessed. This storage device can be connected to a device performing an embodiment of the present disclosure through an external port. Additionally, a separate storage device on a communication network may be connected to the device performing an embodiment of the present disclosure.
- a communication network such as the Internet, Intranet, LAN (Local Area Network), WLAN (Wide LAN), or SAN (Storage Area Network), or a combination of these. It may be stored in an attachable storage device that can be accessed. This storage device can be connected to a device performing an embodiment of the present disclosure through an external port. Additionally, a separate storage device on a communication network may be connected to the device performing an embodiment of the present disclosure.
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Abstract
Description
| BWP ::= SEQUENCE { bwp-Id BWP-Id, (대역폭파트 식별자) locationAndBandwidth INTEGER (1..65536), (대역폭파트 위치) subcarrierSpacing ENUMERATED {n0, n1, n2, n3, n4, n5}, (부반송파 간격) cyclicPrefix ENUMERATED { extended } (순환 전치) } |
| PDSCH-TimeDomainResourceAllocationList information element PDSCH-TimeDomainResourceAllocationList ::= SEQUENCE (SIZE(1..maxNrofDL-Allocations)) OF PDSCH-TimeDomainResourceAllocation PDSCH-TimeDomainResourceAllocation ::= SEQUENCE { k0 INTEGER(0..32) OPTIONAL, -- Need S (PDCCH-to-PDSCH 타이밍, 슬롯 단위) mappingType ENUMERATED {typeA, typeB}, (PDSCH 매핑 타입) startSymbolAndLength INTEGER (0..127) (PDSCH의 시작 심볼 및 길이) } |
| PDSCH-TimeDomainResourceAllocationList information element PDSCH-TimeDomainResourceAllocationList ::= SEQUENCE (SIZE(1..maxNrofDL-Allocations)) OF PDSCH-TimeDomainResourceAllocation PDSCH-TimeDomainResourceAllocation ::= SEQUENCE { k0 INTEGER(0..32) OPTIONAL, -- Need S (PDCCH-to-PDSCH 타이밍, 슬롯 단위) mappingType ENUMERATED {typeA, typeB}, (PDSCH 매핑 타입) startSymbolAndLength INTEGER (0..127) (PDSCH의 시작 심볼 및 길이) } |
| Bandwidth Part Size | Configuration 1 | Configuration 2 |
| 1 - 36 | 2 | 4 |
| 37 - 72 | 4 | 8 |
| 73 - 144 | 8 | 16 |
| 145 - 275 | 16 | 16 |
| ControlResourceSet ::= SEQUENCE { -- Corresponds to L1 parameter 'CORESET-ID' controlResourceSetId ControlResourceSetId, (제어자원세트 식별자(Identity)) frequencyDomainResources BIT STRING (SIZE (45)), (주파수 축 자원할당 정보) duration INTEGER (1..maxCoReSetDuration), (시간 축 자원할당 정보) cce-REG-MappingType CHOICE { (CCE-to-REG 매핑 방식) interleaved SEQUENCE { reg-BundleSize ENUMERATED {n2, n3, n6}, (REG 번들 크기) precoderGranularity ENUMERATED {sameAsREG-bundle, allContiguousRBs}, interleaverSize ENUMERATED {n2, n3, n6} (인터리버 크기) shiftIndex INTEGER(0..maxNrofPhysicalResourceBlocks-1) OPTIONAL (인터리버 쉬프트(Shift)) }, nonInterleaved NULL }, tci-StatesPDCCH SEQUENCE(SIZE (1..maxNrofTCI-StatesPDCCH)) OF TCI-StateId OPTIONAL, (QCL 설정 정보) tci-PresentInDCI ENUMERATED {enabled} OPTIONAL, -- Need S } |
| SearchSpace ::= SEQUENCE { -- Identity of the search space. SearchSpaceId = 0 identifies the SearchSpace configured via PBCH (MIB) or ServingCellConfigCommon. searchSpaceId SearchSpaceId, (탐색공간 식별자) controlResourceSetId ControlResourceSetId, (제어자원세트 식별자) monitoringSlotPeriodicityAndOffset CHOICE { (모니터링 슬롯 레벨 주기) sl1 NULL, sl2 INTEGER (0..1), sl4 INTEGER (0..3), sl5 INTEGER (0..4), sl8 INTEGER (0..7), sl10 INTEGER (0..9), sl16 INTEGER (0..15), sl20 INTEGER (0..19) } OPTIONAL, duration(모니터링 길이) INTEGER (2..2559) monitoringSymbolsWithinSlot BIT STRING (SIZE (14)) OPTIONAL, (슬롯 내 모니터링 심볼) nrofCandidates SEQUENCE { (집성 레벨 별 PDCCH 후보군 수) aggregationLevel1 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8}, aggregationLevel2 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8}, aggregationLevel4 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8}, aggregationLevel8 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8}, aggregationLevel16 ENUMERATED {n0, n1, n2, n3, n4, n5, n6, n8} }, searchSpaceType CHOICE { (탐색공간 타입) -- Configures this search space as common search space (CSS) and DCI formats to monitor. common SEQUENCE { (공통 탐색 공간) } ue-Specific SEQUENCE { (단말-특정 탐색공간) -- Indicates whether the UE monitors in this USS for DCI formats 0-0 and 1-0 or for formats 0-1 and 1-1. formats ENUMERATED {formats0-0-And-1-0, formats0-1-And-1-1}, ... } |
| DCI format | Usage |
| 0_0 | Scheduling of PUSCH in one cell |
| 0_1 | Scheduling of PUSCH in one cell |
| 1_0 | Scheduling of PDSCH in one cell |
| 1_1 | Scheduling of PDSCH in one cell |
| 2_0 | Notifying a group of UEs of the slot format |
| 2_1 | Notifying a group of UEs of the PRB(s) and OFDM symbol(s) where UE may assume no transmission is intended for the UE |
| 2_2 | Transmission of TPC commands for PUCCH and PUSCH |
| 2_3 | Transmission of a group of TPC commands for SRS transmissions by one or more UEs |
| -- ASN1START -- TAG-CSI-RESOURCECONFIG-START CSI-ResourceConfig ::= SEQUENCE { csi-ResourceConfigId CSI-ResourceConfigId, csi-RS-ResourceSetList CHOICE { nzp-CSI-RS-SSB SEQUENCE { nzp-CSI-RS-ResourceSetList SEQUENCE (SIZE (1..maxNrofNZP-CSI-RS-ResourceSetsPerConfig)) OF NZP-CSI-RS-ResourceSetId OPTIONAL, -- Need R csi-SSB-ResourceSetList SEQUENCE (SIZE (1..maxNrofCSI-SSB-ResourceSetsPerConfig)) OF CSI-SSB-ResourceSetId OPTIONAL -- Need R }, csi-IM-ResourceSetList SEQUENCE (SIZE (1..maxNrofCSI-IM-ResourceSetsPerConfig)) OF CSI-IM-ResourceSetId }, bwp-Id BWP-Id, resourceType ENUMERATED { aperiodic, semiPersistent, periodic }, ... } -- TAG-CSI-RESOURCECONFIG-STOP -- ASN1STOP |
| -- ASN1START -- TAG-NZP-CSI-RS-RESOURCESET-START NZP-CSI-RS-ResourceSet ::= SEQUENCE { nzp-CSI-ResourceSetId NZP-CSI-RS-ResourceSetId, nzp-CSI-RS-Resources SEQUENCE (SIZE (1..maxNrofNZP-CSI-RS-ResourcesPerSet)) OF NZP-CSI-RS-ResourceId, repetition ENUMERATED { on, off } OPTIONAL, -- Need S aperiodicTriggeringOffset INTEGER(0..6) OPTIONAL, -- Need S trs-Info ENUMERATED {true} OPTIONAL, -- Need R ... } -- TAG-NZP-CSI-RS-RESOURCESET-STOP -- ASN1STOP |
| -- ASN1START -- TAG-NZP-CSI-RS-RESOURCE-START NZP-CSI-RS-Resource ::= SEQUENCE { nzp-CSI-RS-ResourceId NZP-CSI-RS-ResourceId, resourceMapping CSI-RS-ResourceMapping, powerControlOffset INTEGER (-8..15), powerControlOffsetSS ENUMERATED{db-3, db0, db3, db6} OPTIONAL, -- Need R scramblingID ScramblingId, periodicityAndOffset CSI-ResourcePeriodicityAndOffset OPTIONAL, -- Cond PeriodicOrSemiPersistent qcl-InfoPeriodicCSI-RS TCI-StateId OPTIONAL, -- Cond Periodic ... } -- TAG-NZP-CSI-RS-RESOURCE-STOP -- ASN1STOP |
| -- ASN1START -- TAG-CSI-REPORTCONFIG-START CSI-ReportConfig ::= SEQUENCE { reportConfigId CSI-ReportConfigId, carrier ServCellIndex OPTIONAL, -- Need S resourcesForChannelMeasurement CSI-ResourceConfigId, csi-IM-ResourcesForInterference CSI-ResourceConfigId OPTIONAL, -- Need R nzp-CSI-RS-ResourcesForInterference CSI-ResourceConfigId OPTIONAL, -- Need R reportConfigType CHOICE { periodic SEQUENCE { reportSlotConfig CSI-ReportPeriodicityAndOffset, pucch-CSI-ResourceList SEQUENCE (SIZE (1..maxNrofBWPs)) OF PUCCH-CSI-Resource }, semiPersistentOnPUCCH SEQUENCE { reportSlotConfig CSI-ReportPeriodicityAndOffset, pucch-CSI-ResourceList SEQUENCE (SIZE (1..maxNrofBWPs)) OF PUCCH-CSI-Resource }, semiPersistentOnPUSCH SEQUENCE { reportSlotConfig ENUMERATED {sl5, sl10, sl20, sl40, sl80, sl160, sl320}, reportSlotOffsetList SEQUENCE (SIZE (1.. maxNrofUL-Allocations)) OF INTEGER(0..32), p0alpha P0-PUSCH-AlphaSetId }, aperiodic SEQUENCE { reportSlotOffsetList SEQUENCE (SIZE (1..maxNrofUL-Allocations)) OF INTEGER(0..32) } }, reportQuantity CHOICE { none NULL, cri-RI-PMI-CQI NULL, cri-RI-i1 NULL, cri-RI-i1-CQI SEQUENCE { pdsch-BundleSizeForCSI ENUMERATED {n2, n4} OPTIONAL -- Need S }, cri-RI-CQI NULL, cri-RSRP NULL, ssb-Index-RSRP NULL, cri-RI-LI-PMI-CQI NULL }, reportFreqConfiguration SEQUENCE { cqi-FormatIndicator ENUMERATED { widebandCQI, subbandCQI } OPTIONAL, -- Need R pmi-FormatIndicator ENUMERATED { widebandPMI, subbandPMI } OPTIONAL, -- Need R csi-ReportingBand CHOICE { subbands3 BIT STRING(SIZE(3)), subbands4 BIT STRING(SIZE(4)), subbands5 BIT STRING(SIZE(5)), subbands6 BIT STRING(SIZE(6)), subbands7 BIT STRING(SIZE(7)), subbands8 BIT STRING(SIZE(8)), subbands9 BIT STRING(SIZE(9)), subbands10 BIT STRING(SIZE(10)), subbands11 BIT STRING(SIZE(11)), subbands12 BIT STRING(SIZE(12)), subbands13 BIT STRING(SIZE(13)), subbands14 BIT STRING(SIZE(14)), subbands15 BIT STRING(SIZE(15)), subbands16 BIT STRING(SIZE(16)), subbands17 BIT STRING(SIZE(17)), subbands18 BIT STRING(SIZE(18)), ..., subbands19-v1530 BIT STRING(SIZE(19)) } OPTIONAL -- Need S } OPTIONAL, -- Need R timeRestrictionForChannelMeasurements ENUMERATED {configured, notConfigured}, timeRestrictionForInterferenceMeasurements ENUMERATED {configured, notConfigured}, codebookConfig CodebookConfig OPTIONAL, -- Need R dummy ENUMERATED {n1, n2} OPTIONAL, -- Need R groupBasedBeamReporting CHOICE { enabled NULL, disabled SEQUENCE { nrofReportedRS ENUMERATED {n1, n2, n3, n4} OPTIONAL -- Need S } }, cqi-Table ENUMERATED {table1, table2, table3, spare1} OPTIONAL, -- Need R subbandSize ENUMERATED {value1, value2}, non-PMI-PortIndication SEQUENCE (SIZE (1..maxNrofNZP-CSI-RS-ResourcesPerConfig)) OF PortIndexFor8Ranks OPTIONAL, -- Need R ..., [[ semiPersistentOnPUSCH-v1530 SEQUENCE { reportSlotConfig-v1530 ENUMERATED {sl4, sl8, sl16} } OPTIONAL -- Need R ]] } |
| CSI request field | CSI trigger state | CSI-ReportConfigId | CSI-ResourceConfigId |
| 00 | no CSI request | N/A | N/A |
| 01 | CSI trigger state#1 | CSI report#1 | CSI resource#1, |
| CSI report#2 | CSI resource#2 | ||
| 10 | CSI trigger state#2 | CSI report#3 | CSI resource#3 |
| 11 | CSI trigger state#3 | CSI report#4 | CSI resource#4 |
| μ | Z1 [symbols] | |
| Z1 | Z'1 | |
| 0 | 10 | 8 |
| 1 | 13 | 11 |
| 2 | 25 | 21 |
| 3 | 43 | 36 |
| μ | Z1 [symbols] | Z2 [symbols] | Z3 [symbols] | |||
| Z1 | Z'1 | Z2 | Z'2 | Z3 | Z' | |
| 0 | 22 | 16 | 40 | 37 | 22 | X1 |
| 1 | 33 | 30 | 72 | 69 | 33 | X2 |
| 2 | 44 | 42 | 141 | 140 | min(44, X3+KB1) | X3 |
| 3 | 97 | 85 | 152 | 140 | min(97, X4+KB2) | X4 |
| - =0 : CSI report에 설정된 reportQuantity가 'none'으로 설정되며, CSI report와 연결된 CSI-RS resource set에 trs-Info가 설정된 경우 - =1: CSI report에 설정된 reportQuantity가 'none', 'cri-RSRP', 'ssb-Index-RSRP'으로 설정되며, CSI report와 연결된 CSI-RS resource set에 trs-Info가 설정되지 않은 경우 - CSI report에 설정된 reportQuantity가 'cri-RI-PMI-CQI', 'cri-RI-i1', 'cri-RI-i1-CQI', 'cri-RI-CQI', or 'cri-RI-LI-PMI-CQI'로 설정된 경우 >> = NCPU: 비주기적 CSI report가 trigger 되며 해당 CSI report가 TB / HARQ-ACK 중 하나 또는 모두와 multiplexing 되지 않는 경우. 해당 CSI report는 wideband CSI이며 최대 4 CSI-RS port에 해당하고, CRI report가 없는 단일 resource에 해당하며 codebookType이 'typeI-SinglePanel'에 해당하거나 reportQuantity가 'cri-RI-CQI'에 해당하는 경우 (해당 경우는 상술한 지연 요구조건 1에 해당하는 경우이며, 단말이 가용 CPU를 모두 사용하여 CSI를 빠르게 계산 후 보고하는 경우로 볼 수 있음) >> = Ks: 상기 경우를 제외한 나머지 모든 경우. Ks는 채널 측정을 위한 CSI-RS resource set 내 CSI-RS resource 수를 가리킴 |
| CSI 우선순위 값 , - y=0 PUSCH를 통해 전송되는 aperiodic CSI report일 경우, y=1 PUSCH를 통해 전송되는 semi-persistent CSI report일 경우, y=2 PUCCH를 통해 전송되는 semi-persistent CSI report일 경우,y=3 PUCCH를 통해 전송되는 periodic CSI report일 경우; - k=0 CSI report 가 L1-RSRP를 포함하는 경우, k=1 CSI report가 L1-RSRP를 포함하지 않는 경우; - c : 서빙셀 인덱스, Ncells :상위 계층 시그널링으로 설정된 최대 서빙셀 개수 (maxNrofServingCells); - s : CSI report configuration 인덱스 (reportConfigID), Ms: 상위 계층 시그널링으로 설정된 최대 CSI report configuration 개수 (maxNrofCSI-ReportConfigurations). |
| CSI-RS Configuration | Periodic CSI Reporting | Semi-Persistent CSI Reporting | Aperiodic CSI Reporting |
| Periodic CSI-RS | No dynamic triggering/activation | For reporting on PUCCH, the UE receives an activation command [10, TS 38.321]; for reporting on PUSCH, the UE receives triggering on DCI | Triggered by DCI; additionally, activation command [10, TS 38.321] possible as defined in Subclause 5.2.1.5.1. |
| Semi-Persistent CSI-RS | Not Supported | For reporting on PUCCH, the UE receives an activation command [10, TS 38.321]; for reporting on PUSCH, the UE receives triggering on DCI | Triggered by DCI; additionally, activation command [10, TS 38.321] possible as defined in Subclause 5.2.1.5.1. |
| Aperiodic CSI-RS | Not Supported | Not Supported | Triggered by DCI; additionally, activation command [10, TS 38.321] possible as defined in Subclause 5.2.1.5.1. |
| aperiodicTriggeringOffset | Offset X |
| 0 | 0 slot |
| 1 | 1 slot |
| 2 | 2 slots |
| 3 | 3 slots |
| 4 | 4 slots |
| 5 | 16 slots |
| 6 | 24 slots |
| ConfiguredGrantConfig ::= SEQUENCE { frequencyHopping ENUMERATED {intraSlot, interSlot} OPTIONAL, -- Need S, cg-DMRS-Configuration DMRS-UplinkConfig, mcs-Table ENUMERATED {qam256, qam64LowSE} OPTIONAL, -- Need S mcs-TableTransformPrecoder ENUMERATED {qam256, qam64LowSE} OPTIONAL, -- Need S uci-OnPUSCH SetupRelease { CG-UCI-OnPUSCH } OPTIONAL, -- Need M resourceAllocation ENUMERATED { resourceAllocationType0, resourceAllocationType1, dynamicSwitch }, rbg-Size ENUMERATED {config2} OPTIONAL, -- Need S powerControlLoopToUse ENUMERATED {n0, n1}, p0-PUSCH-Alpha P0-PUSCH-AlphaSetId, transformPrecoder ENUMERATED {enabled, disabled} OPTIONAL, -- Need S nrofHARQ-Processes INTEGER(1..16), repK ENUMERATED {n1, n2, n4, n8}, repK-RV ENUMERATED {s1-0231, s2-0303, s3-0000} OPTIONAL, -- Need R periodicity ENUMERATED { sym2, sym7, sym1x14, sym2x14, sym4x14, sym5x14, sym8x14, sym10x14, sym16x14, sym20x14, sym32x14, sym40x14, sym64x14, sym80x14, sym128x14, sym160x14, sym256x14, sym320x14, sym512x14, sym640x14, sym1024x14, sym1280x14, sym2560x14, sym5120x14, sym6, sym1x12, sym2x12, sym4x12, sym5x12, sym8x12, sym10x12, sym16x12, sym20x12, sym32x12, sym40x12, sym64x12, sym80x12, sym128x12, sym160x12, sym256x12, sym320x12, sym512x12, sym640x12, sym1280x12, sym2560x12 }, configuredGrantTimer INTEGER (1..64) OPTIONAL, -- Need R rrc-ConfiguredUplinkGrant SEQUENCE { timeDomainOffset INTEGER (0..5119), timeDomainAllocation INTEGER (0..15), frequencyDomainAllocation BIT STRING (SIZE(18)), antennaPort INTEGER (0..31), dmrs-SeqInitialization INTEGER (0..1) OPTIONAL, -- Need R precodingAndNumberOfLayers INTEGER (0..63), srs-ResourceIndicator INTEGER (0..15) OPTIONAL, -- Need R mcsAndTBS INTEGER (0..31), frequencyHoppingOffset INTEGER (1.. maxNrofPhysicalResourceBlocks-1) OPTIONAL, -- Need R pathlossReferenceIndex INTEGER (0..maxNrofPUSCH-PathlossReferenceRSs-1), ... } OPTIONAL, -- Need R ... } |
| PUSCH-Config ::= SEQUENCE { dataScramblingIdentityPUSCH INTEGER (0..1023) OPTIONAL, -- Need S txConfig ENUMERATED {codebook, nonCodebook} OPTIONAL, -- Need S dmrs-UplinkForPUSCH-MappingTypeA SetupRelease { DMRS-UplinkConfig } OPTIONAL, -- Need M dmrs-UplinkForPUSCH-MappingTypeB SetupRelease { DMRS-UplinkConfig } OPTIONAL, -- Need M pusch-PowerControl PUSCH-PowerControl OPTIONAL, -- Need M frequencyHopping ENUMERATED {intraSlot, interSlot} OPTIONAL, -- Need S frequencyHoppingOffsetLists SEQUENCE (SIZE (1..4)) OF INTEGER (1.. maxNrofPhysicalResourceBlocks-1) OPTIONAL, -- Need M resourceAllocation ENUMERATED { resourceAllocationType0, resourceAllocationType1, dynamicSwitch}, pusch-TimeDomainAllocationList SetupRelease { PUSCH-TimeDomainResourceAllocationList } OPTIONAL, -- Need M pusch-AggregationFactor ENUMERATED { n2, n4, n8 } OPTIONAL, -- Need S mcs-Table ENUMERATED {qam256, qam64LowSE} OPTIONAL, -- Need S mcs-TableTransformPrecoder ENUMERATED {qam256, qam64LowSE} OPTIONAL, -- Need S transformPrecoder ENUMERATED {enabled, disabled} OPTIONAL, -- Need S codebookSubset ENUMERATED {fullyAndPartialAndNonCoherent, partialAndNonCoherent,nonCoherent} OPTIONAL, -- Cond codebookBased maxRank INTEGER (1..4) OPTIONAL, -- Cond codebookBased rbg-Size ENUMERATED { config2} OPTIONAL, -- Need S uci-OnPUSCH SetupRelease { UCI-OnPUSCH} OPTIONAL, -- Need M tp-pi2BPSK ENUMERATED {enabled} OPTIONAL, -- Need S ... } |
Claims (15)
- 통신 시스템의 단말이 수행하는 방법에 있어서,기지국으로부터 채널 상태 정보(channel state information, CSI) 보고를 위한 부분대역(subband)을 지시하는 비트맵을 수신하는 단계;상기 비트맵을 기반으로 확인된 상기 CSI 보고를 위한 하나 이상의 부분대역을 기반으로 CSI를 생성하는 단계; 및상기 기지국으로 상기 CSI를 전송하는 단계를 포함하고,상기 하나 이상의 부분대역은 상기 비트맵을 해석해 상기 하나 이상의 부분대역을 확인하기 위한 제1 방법 또는 제2 방법을 이용해 확인되는 것을 특징으로 하는 방법.
- 제1항에 있어서,상기 비트맵의 각 비트는 상기 각 비트에 해당하는 특정 개수의 PRB(physical resource block)을 포함하는 부분대역이 상기 CSI 보고에 고려되는지 여부를 지시하며,상기 제1 방법은 상기 비트맵의 1로 설정된 각 비트에 해당하는 낮은 주파수 대역부터의 부분대역에 부분대역 인덱스를 할당하는 방법이고, 상기 제2 방법은 가장 낮은 주파수 대역부터 모든 부분대역에 부분대역 인덱스를 할당하는 방법이며,상기 비트맵은 상기 제1 방법 또는 상기 제2 방법에 따라 해석하더라도 홀수 번째 부분대역에 해당하는 같은 주파수 대역 및 짝수 번째 부분대역에 해당하는 같은 주파수 대역을 지시하는 것을 특징으로 하는 방법.
- 제1항에 있어서,상기 기지국으로 상기 CSI 보고를 위한 부분대역 인덱싱 방법에 관련된 단말 역량 정보를 전송하는 단계를 더 포함하고,상기 단말 역량 정보는 상기 비트맵을 기반으로 상기 하나 이상의 부분대역을 확인하기 위한 제1 방법 또는 제2 방법, 또는 단말의 릴리즈(release)에 관련된 것을 특징으로 하는 방법.
- 제1항에 있어서,상기 단말이 릴리즈(release) 17에 해당하는 경우, 상기 하나 이상의 부분대역은 상기 비트맵이 상기 제1 방법으로 해석되어 확인되는 것을 특징으로 하는 방법.
- 통신 시스템의 기지국이 수행하는 방법에 있어서,단말로 채널 상태 정보(channel state information, CSI) 보고를 위한 부분대역(subband)을 지시하는 비트맵을 전송하는 단계; 및상기 단말로부터 CSI를 수신하는 단계를 포함하고,상기 CSI는 상기 비트맵에 의해 지시된 상기 CSI 보고를 위한 하나 이상의 부분대역을 기반으로 하고,상기 하나 이상의 부분대역은 상기 비트맵을 해석해 상기 하나 이상의 부분대역을 확인하기 위한 제1 방법 또는 제2 방법을 이용해 확인되는 것을 특징으로 하는 방법.
- 제5항에 있어서,상기 비트맵의 각 비트는 상기 각 비트에 해당하는 특정 개수의 PRB(physical resource block)을 포함하는 부분대역이 상기 CSI 보고에 고려되는지 여부를 지시하며,상기 제1 방법은 상기 비트맵의 1로 설정된 각 비트에 해당하는 낮은 주파수 대역부터의 부분대역에 부분대역 인덱스를 할당하는 방법이고, 상기 제2 방법은 가장 낮은 주파수 대역부터 모든 부분대역에 부분대역 인덱스를 할당하는 방법이며,상기 비트맵은 상기 제1 방법 또는 상기 제2 방법에 따라 해석하더라도 홀수 번째 부분대역에 해당하는 같은 주파수 대역 및 짝수 번째 부분대역에 해당하는 같은 주파수 대역을 지시하는 것을 특징으로 하는 방법.
- 제5항에 있어서,상기 단말로부터 상기 CSI 보고를 위한 부분대역 인덱싱 방법에 관련된 단말 역량 정보를 수신하는 단계를 더 포함하고,상기 단말 역량 정보는 상기 비트맵을 기반으로 상기 하나 이상의 부분대역을 확인하기 위한 제1 방법 또는 제2 방법, 또는 단말의 릴리즈(release)에 관련된 것을 특징으로 하는 방법.
- 제5항에 있어서,상기 단말이 릴리즈(release) 17에 해당하는 경우, 상기 비트맵은 상기 제1 방법을 이용해 상기 하나 이상의 부분대역을 지시하도록 생성되는 것을 특징으로 하는 방법.
- 통신 시스템의 단말에 있어서,송수신부; 및기지국으로부터 채널 상태 정보(channel state information, CSI) 보고를 위한 부분대역(subband)을 지시하는 비트맵을 수신하고, 상기 비트맵을 기반으로 확인된 상기 CSI 보고를 위한 하나 이상의 부분대역을 기반으로 CSI를 생성하고, 상기 기지국으로 상기 CSI를 전송하도록 제어하는 제어부를 포함하고,상기 하나 이상의 부분대역은 상기 비트맵을 해석해 상기 하나 이상의 부분대역을 확인하기 위한 제1 방법 또는 제2 방법을 이용해 확인되는 것을 특징으로 하는 단말.
- 제9항에 있어서,상기 비트맵의 각 비트는 상기 각 비트에 해당하는 특정 개수의 PRB(physical resource block)을 포함하는 부분대역이 상기 CSI 보고에 고려되는지 여부를 지시하며,상기 제1 방법은 상기 비트맵의 1로 설정된 각 비트에 해당하는 낮은 주파수 대역부터의 부분대역에 부분대역 인덱스를 할당하는 방법이고, 상기 제2 방법은 가장 낮은 주파수 대역부터 모든 부분대역에 부분대역 인덱스를 할당하는 방법이며,상기 비트맵은 상기 제1 방법 또는 상기 제2 방법에 따라 해석하더라도 홀수 번째 부분대역에 해당하는 같은 주파수 대역 및 짝수 번째 부분대역에 해당하는 같은 주파수 대역을 지시하는 것을 특징으로 하는 단말.
- 제9항에 있어서,상기 제어부는 상기 기지국으로 상기 CSI 보고를 위한 부분대역 인덱싱 방법에 관련된 단말 역량 정보를 전송하도록 더 제어하고,상기 단말 역량 정보는 상기 비트맵을 기반으로 상기 하나 이상의 부분대역을 확인하기 위한 제1 방법 또는 제2 방법, 또는 단말의 릴리즈(release)에 관련된 것을 특징으로 하는 단말.
- 제9항에 있어서,상기 단말이 릴리즈(release) 17에 해당하는 경우, 상기 하나 이상의 부분대역은 상기 비트맵이 상기 제1 방법으로 해석되어 확인되는 것을 특징으로 하는 단말.
- 통신 시스템의 기지국에 있어서,송수신부; 및단말로 채널 상태 정보(channel state information, CSI) 보고를 위한 부분대역(subband)을 지시하는 비트맵을 전송하고, 상기 단말로부터 CSI를 수신하도록 제어하는 제어부를 포함하고,상기 CSI는 상기 비트맵에 의해 지시된 상기 CSI 보고를 위한 하나 이상의 부분대역을 기반으로 하고,상기 하나 이상의 부분대역은 상기 비트맵을 해석해 상기 하나 이상의 부분대역을 확인하기 위한 제1 방법 또는 제2 방법을 이용해 확인되는 것을 특징으로 하는 기지국.
- 제13항에 있어서,상기 비트맵의 각 비트는 상기 각 비트에 해당하는 특정 개수의 PRB(physical resource block)을 포함하는 부분대역이 상기 CSI 보고에 고려되는지 여부를 지시하며,상기 제1 방법은 상기 비트맵의 1로 설정된 각 비트에 해당하는 낮은 주파수 대역부터의 부분대역에 부분대역 인덱스를 할당하는 방법이고, 상기 제2 방법은 가장 낮은 주파수 대역부터 모든 부분대역에 부분대역 인덱스를 할당하는 방법이며,상기 비트맵은 상기 제1 방법 또는 상기 제2 방법에 따라 해석하더라도 홀수 번째 부분대역에 해당하는 같은 주파수 대역 및 짝수 번째 부분대역에 해당하는 같은 주파수 대역을 지시하는 것을 특징으로 하는 기지국.
- 제13항에 있어서,상기 제어부는 상기 단말로부터 상기 CSI 보고를 위한 부분대역 인덱싱 방법에 관련된 단말 역량 정보를 수신하도록 더 제어하고,상기 단말 역량 정보는 상기 비트맵을 기반으로 상기 하나 이상의 부분대역을 확인하기 위한 제1 방법 또는 제2 방법, 또는 단말의 릴리즈(release)에 관련된 것을 특징으로 하는 기지국.
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| EP23877643.9A EP4586517A4 (en) | 2022-10-11 | 2023-10-11 | METHOD AND DEVICE FOR REPORTING CHANNEL STATUS INFORMATION IN A WIRELESS COMMUNICATION SYSTEM |
| CN202380071780.6A CN120019585A (zh) | 2022-10-11 | 2023-10-11 | 无线通信系统中报告信道状态信息的方法和设备 |
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| KR10-2023-0134419 | 2023-10-10 | ||
| KR1020230134419A KR20240050286A (ko) | 2022-10-11 | 2023-10-10 | 무선 통신 시스템에서 채널 상태 정보 보고 방법 및 장치 |
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Cited By (2)
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| WO2026001812A1 (zh) * | 2024-06-25 | 2026-01-02 | 维沃移动通信有限公司 | 通信方法、终端及网络侧设备 |
| WO2026060581A1 (en) * | 2024-09-19 | 2026-03-26 | Qualcomm Incorporated | Power scaling factor for channel state information reporting |
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| US11128362B2 (en) * | 2019-03-11 | 2021-09-21 | Samsung Electronics Co., Ltd. | Method and apparatus for multiplexing and omitting channel state information |
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- 2023-10-11 EP EP23877643.9A patent/EP4586517A4/en active Pending
- 2023-10-11 CN CN202380071780.6A patent/CN120019585A/zh active Pending
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| WO2026060581A1 (en) * | 2024-09-19 | 2026-03-26 | Qualcomm Incorporated | Power scaling factor for channel state information reporting |
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| CN120019585A (zh) | 2025-05-16 |
| EP4586517A4 (en) | 2025-12-24 |
| EP4586517A1 (en) | 2025-07-16 |
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