WO2017078338A1 - 무선 통신 시스템에서 채널 상태 보고 방법 및 이를 위한 장치 - Google Patents
무선 통신 시스템에서 채널 상태 보고 방법 및 이를 위한 장치 Download PDFInfo
- Publication number
- WO2017078338A1 WO2017078338A1 PCT/KR2016/012338 KR2016012338W WO2017078338A1 WO 2017078338 A1 WO2017078338 A1 WO 2017078338A1 KR 2016012338 W KR2016012338 W KR 2016012338W WO 2017078338 A1 WO2017078338 A1 WO 2017078338A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- csi
- aperiodic
- transmitted
- resource index
- channel state
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0643—Feedback on request
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
- H04B7/0814—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/261—Details of reference signals
- H04L27/2613—Structure of the reference signals
Definitions
- the present invention relates to a wireless communication system, and more particularly, to a method and apparatus for reporting channel status in a wireless communication system.
- K (> 1) CSIs with different 2D (vertical and / or horizontal) precoding applied to one channel state information (CSI) process, with the introduction of a full-dimension (MIMO) mulitle input multiple output (MIMO) environment.
- RS reference signal resources can be transmitted to determine or use the 2D domain to be used by the terminal.
- the terminal reports the CSI-RS resource or the 2D domain to the base station through the aperiodic CSI report, there is a need for a method for reducing the complexity of the terminal and unnecessary transmission.
- the present invention proposes a scheme for channel state reporting in a wireless communication system and an operation related thereto.
- the method is performed by a terminal, and the method includes a plurality of channel state information-reference signals.
- the transmitted aperiodic CSI is a CSI- for the CSI process indicated by the aperiodic CSI report request. If a specific time has not elapsed since the RS resource index was reported, the CSI-RS resource index for the CSI process not updated may be included.
- the remaining channel state related information in the transmitted aperiodic CSI may be calculated on the CSI-RS resource indicated by the CSI-RS resource index.
- the specific time may be a time corresponding to five subframes.
- the CSI-RS resource index may always be sent with other channel state related information.
- the transmitted aperiodic CSI has not exceeded a specific time since the CSI-RS resource index for the CSI process indicated by the aperiodic CSI report request has been reported and all CSI-RS resources of the CSI process have been reported. If the total number of antenna ports for a value exceeds a threshold, it may include a CSI-RS resource index for the CSI process that has not been updated.
- the transmitted aperiodic CSI has not exceeded a specific time since the CSI-RS resource index for the CSI process indicated by the aperiodic CSI report request is reported and the number of the plurality of CSI-RS resources If the threshold is exceeded, it may include a CSI-RS resource index for the CSI process that has not been updated.
- a terminal configured to report an aperiodic channel state in a wireless communication system according to another embodiment of the present invention, the terminal comprising: a transmitter; receiving set; And a processor configured to control the transmitter and the receiver, the processor configured to: configure settings for one or more CSI processes including a plurality of channel state information-reference signal (CSI-RS) resources Received from a base station, and precoding is applied to each of the plurality of CSI-RS resources; Receive aperiodic channel state information (CSI) report request from the base station, and transmit aperiodic CSI for the CSI process indicated by the aperiodic CSI report request to the base station, wherein the transmitted aperiodic CSI is If a specific time has not elapsed since the CSI-RS resource index for the CSI process indicated by the aperiodic CSI report request is reported, the CSI-RS resource index for the CSI process not updated may be included.
- CSI-RS channel state information-reference signal
- the remaining channel state related information in the transmitted aperiodic CSI may be calculated on the CSI-RS resource indicated by the CSI-RS resource index.
- the specific time may be a time corresponding to five subframes.
- the CSI-RS resource index may always be sent with other channel state related information.
- the transmitted aperiodic CSI has not exceeded a specific time since the CSI-RS resource index for the CSI process indicated by the aperiodic CSI report request has been reported and all CSI-RS resources of the CSI process have been reported. If the total number of antenna ports for a value exceeds a threshold, it may include a CSI-RS resource index for the CSI process that has not been updated.
- the transmitted aperiodic CSI has not exceeded a specific time since the CSI-RS resource index for the CSI process indicated by the aperiodic CSI report request is reported and the number of the plurality of CSI-RS resources If the threshold is exceeded, it may include a CSI-RS resource index for the CSI process that has not been updated.
- FIG. 1 illustrates an example of a radio frame structure used in a wireless communication system.
- FIG. 2 illustrates an example of a downlink / uplink (DL / UL) slot structure in a wireless communication system.
- FIG 3 illustrates a downlink (DL) subframe structure used in a 3GPP LTE / LTE-A system.
- FIG. 4 illustrates an example of an uplink (UL) subframe structure used in a 3GPP LTE / LTE-A system.
- FIG. 5 shows a 2D (dimension) or full dimension (FD) antenna structure.
- FIG. 6 illustrates a time point of reporting a beam index or a CSI-RS resource index according to an embodiment of the present invention.
- FIG. 7 illustrates a time point of reporting a beam index or a CSI-RS resource index according to an embodiment of the present invention.
- FIG. 8 illustrates a time point of reporting a beam index or a CSI-RS resource index according to an embodiment of the present invention.
- FIG 9 illustrates an example in which an offset for adjusting a reporting time point of a beam index or a CSI-RS resource index is applied according to an embodiment of the present invention.
- FIG. 11 shows a block diagram of an apparatus for implementing an embodiment (s) of the present invention.
- a user equipment may be fixed or mobile, and various devices which transmit and receive user data and / or various control information by communicating with a base station (BS) belong to this.
- the UE may be a terminal equipment (MS), a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, a personal digital assistant (PDA), or a wireless modem. It may be called a modem, a handheld device, or the like.
- a BS generally refers to a fixed station communicating with the UE and / or another BS, and communicates with the UE and another BS to exchange various data and control information.
- BS includes Advanced Base Station (ABS), Node-B (NB), evolved-NodeB (eNB), Base Transceiver System (BTS), Access Point, Processing Server (PS), Transmission Point (TP) May be called in other terms.
- ABS Advanced Base Station
- NB Node-B
- eNB evolved-NodeB
- BTS Base Transceiver System
- PS Processing Server
- TP Transmission Point
- BS is collectively referred to as eNB.
- a node refers to a fixed point capable of transmitting / receiving a radio signal by communicating with a user equipment.
- Various forms of eNBs may be used as nodes regardless of their name.
- the node may be a BS, an NB, an eNB, a pico-cell eNB (PeNB), a home eNB (HeNB), a relay, a repeater, and the like.
- the node may not be an eNB.
- it may be a radio remote head (RRH), a radio remote unit (RRU).
- RRHs, RRUs, etc. generally have a power level lower than the power level of the eNB.
- RRH or RRU, RRH / RRU is generally connected to an eNB by a dedicated line such as an optical cable
- RRH / RRU and eNB are generally compared to cooperative communication by eNBs connected by a wireless line.
- cooperative communication can be performed smoothly.
- At least one antenna is installed at one node.
- the antenna may mean a physical antenna or may mean an antenna port, a virtual antenna, or an antenna group.
- Nodes are also called points. Unlike conventional centralized antenna systems (ie, single node systems) where antennas are centrally located at base stations and controlled by one eNB controller, in a multi-node system A plurality of nodes are typically located farther apart than a predetermined interval.
- the plurality of nodes may be managed by one or more eNBs or eNB controllers that control the operation of each node or schedule data to be transmitted / received through each node.
- Each node may be connected to the eNB or eNB controller that manages the node through a cable or dedicated line.
- the same cell identifier (ID) may be used or different cell IDs may be used for signal transmission / reception to / from a plurality of nodes.
- ID cell identifier
- each of the plurality of nodes behaves like some antenna group of one cell.
- a multi-node system may be regarded as a multi-cell (eg, macro-cell / femto-cell / pico-cell) system.
- the network formed by the multiple cells is particularly called a multi-tier network.
- the cell ID of the RRH / RRU and the cell ID of the eNB may be the same or may be different.
- both the RRH / RRU and the eNB operate as independent base stations.
- one or more eNB or eNB controllers connected with a plurality of nodes may control the plurality of nodes to simultaneously transmit or receive signals to the UE via some or all of the plurality of nodes.
- multi-node systems depending on the identity of each node, the implementation of each node, etc., these multi-nodes in that multiple nodes together participate in providing communication services to the UE on a given time-frequency resource.
- the systems are different from single node systems (eg CAS, conventional MIMO system, conventional relay system, conventional repeater system, etc.).
- embodiments of the present invention regarding a method for performing data cooperative transmission using some or all of a plurality of nodes may be applied to various kinds of multi-node systems.
- a node generally refers to an antenna group spaced apart from another node by a predetermined distance or more
- embodiments of the present invention described later may be applied even when the node means any antenna group regardless of the interval.
- the eNB may control the node configured as the H-pol antenna and the node configured as the V-pol antenna, and thus embodiments of the present invention may be applied. .
- a communication scheme that enables different nodes to receive the uplink signal is called multi-eNB MIMO or CoMP (Coordinated Multi-Point TX / RX).
- Cooperative transmission schemes among such cooperative communication between nodes can be largely classified into joint processing (JP) and scheduling coordination.
- the former may be divided into joint transmission (JT) / joint reception (JR) and dynamic point selection (DPS), and the latter may be divided into coordinated scheduling (CS) and coordinated beamforming (CB).
- DPS is also called dynamic cell selection (DCS).
- JP Joint Processing Protocol
- JR refers to a communication scheme in which a plurality of nodes receive the same stream from the UE.
- the UE / eNB combines the signals received from the plurality of nodes to recover the stream.
- the reliability of signal transmission may be improved by transmit diversity.
- DPS in JP refers to a communication technique in which a signal is transmitted / received through one node selected according to a specific rule among a plurality of nodes.
- DPS since a node having a good channel condition between the UE and the node will be selected as a communication node, the reliability of signal transmission can be improved.
- a cell refers to a certain geographic area in which one or more nodes provide a communication service. Therefore, in the present invention, communication with a specific cell may mean communication with an eNB or a node that provides a communication service to the specific cell.
- the downlink / uplink signal of a specific cell means a downlink / uplink signal from / to an eNB or a node that provides a communication service to the specific cell.
- the cell providing uplink / downlink communication service to the UE is particularly called a serving cell.
- the channel state / quality of a specific cell means a channel state / quality of a channel or communication link formed between an eNB or a node providing a communication service to the specific cell and a UE.
- a UE transmits a downlink channel state from a specific node on a channel CSI-RS (Channel State Information Reference Signal) resource to which the antenna port (s) of the specific node is assigned to the specific node. Can be measured using CSI-RS (s).
- CSI-RS Channel State Information Reference Signal
- adjacent nodes transmit corresponding CSI-RS resources on CSI-RS resources orthogonal to each other.
- Orthogonality of CSI-RS resources means that the CSI-RS is allocated by CSI-RS resource configuration, subframe offset, and transmission period that specify symbols and subcarriers carrying the CSI-RS. This means that at least one of a subframe configuration and a CSI-RS sequence for specifying the specified subframes are different from each other.
- Physical Downlink Control CHannel / Physical Control Format Indicator CHannel (PCFICH) / PHICH (Physical Hybrid automatic retransmit request Indicator CHannel) / PDSCH (Physical Downlink Shared CHannel) are respectively DCI (Downlink Control Information) / CFI ( Control Format Indicator) / Downlink ACK / NACK (ACKnowlegement / Negative ACK) / Downlink Means a set of time-frequency resources or a set of resource elements, and also a PUCCH (Physical Uplink Control CHannel) / PUSCH (Physical) Uplink Shared CHannel / PACH (Physical Random Access CHannel) means a set of time-frequency resources or a set of resource elements that carry uplink control information (UCI) / uplink data / random access signals, respectively.
- UCI Uplink Control Information
- PACH Physical Random Access CHannel
- the PDCCH / PCFICH / PHICH / PDSCH / PUCCH / PUSCH / PRACH resource is referred to below ..
- the user equipment transmits the PUCCH / PUSCH / PRACH, respectively.
- PDCCH / PCFICH / PHICH / PDSCH is used for downlink data / control information on or through PDCCH / PCFICH / PHICH / PDSCH, respectively. It is used in the same sense as sending it.
- Figure 1 illustrates an example of a radio frame structure used in a wireless communication system.
- Figure 1 (a) shows a frame structure for frequency division duplex (FDD) used in the 3GPP LTE / LTE-A system
- Figure 1 (b) is used in the 3GPP LTE / LTE-A system
- the frame structure for time division duplex (TDD) is shown.
- a radio frame used in a 3GPP LTE / LTE-A system has a length of 10 ms (307200 Ts), and is composed of 10 equally sized subframes (SF). Numbers may be assigned to 10 subframes in one radio frame.
- Each subframe has a length of 1 ms and consists of two slots. 20 slots in one radio frame may be sequentially numbered from 0 to 19. Each slot is 0.5ms long.
- the time for transmitting one subframe is defined as a transmission time interval (TTI).
- the time resource may be classified by a radio frame number (also called a radio frame index), a subframe number (also called a subframe number), a slot number (or slot index), and the like.
- the radio frame may be configured differently according to the duplex mode. For example, in the FDD mode, since downlink transmission and uplink transmission are divided by frequency, a radio frame includes only one of a downlink subframe or an uplink subframe for a specific frequency band. In the TDD mode, since downlink transmission and uplink transmission are separated by time, a radio frame includes both a downlink subframe and an uplink subframe for a specific frequency band.
- Table 1 illustrates a DL-UL configuration of subframes in a radio frame in the TDD mode.
- D represents a downlink subframe
- U represents an uplink subframe
- S represents a special subframe.
- the singular subframe includes three fields of Downlink Pilot TimeSlot (DwPTS), Guard Period (GP), and Uplink Pilot TimeSlot (UpPTS).
- DwPTS is a time interval reserved for downlink transmission
- UpPTS is a time interval reserved for uplink transmission.
- Table 2 illustrates the configuration of a singular frame.
- FIG. 2 illustrates an example of a downlink / uplink (DL / UL) slot structure in a wireless communication system.
- FIG. 2 shows a structure of a resource grid of a 3GPP LTE / LTE-A system. There is one resource grid per antenna port.
- a slot includes a plurality of Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain and a plurality of resource blocks (RBs) in the frequency domain.
- OFDM symbol may mean a symbol period.
- the signal transmitted in each slot is * Subcarriers and It may be represented by a resource grid composed of OFDM symbols.
- Represents the number of resource blocks (RBs) in the downlink slot Represents the number of RBs in the UL slot.
- Wow Depends on the DL transmission bandwidth and the UL transmission bandwidth, respectively.
- Denotes the number of OFDM symbols in the downlink slot Denotes the number of OFDM symbols in the UL slot.
- the OFDM symbol may be called an OFDM symbol, a Single Carrier Frequency Division Multiplexing (SC-FDM) symbol, or the like according to a multiple access scheme.
- the number of OFDM symbols included in one slot may vary depending on the channel bandwidth and the length of the cyclic prefix (CP). For example, in case of a normal CP, one slot includes 7 OFDM symbols, whereas in case of an extended CP, one slot includes 6 OFDM symbols.
- FIG. 2 illustrates a subframe in which one slot includes 7 OFDM symbols for convenience of description, embodiments of the present invention can be applied to subframes having other numbers of OFDM symbols in the same manner. 2, each OFDM symbol, in the frequency domain, * Subcarriers are included.
- the types of subcarriers may be divided into data subcarriers for data transmission, reference signal subcarriers for transmission of reference signals, null subcarriers for guard band, and direct current (DC) components.
- the null subcarrier for the DC component is a subcarrier left unused and is mapped to a carrier frequency f0 during an OFDM signal generation process or a frequency upconversion process.
- the carrier frequency is also called the center frequency.
- 1 RB in the time domain It is defined as (eg, seven) consecutive OFDM symbols, and is defined by c (for example 12) consecutive subcarriers in the frequency domain.
- a resource composed of one OFDM symbol and one subcarrier is called a resource element (RE) or tone. Therefore, one RB is * It consists of three resource elements.
- Each resource element in the resource grid may be uniquely defined by an index pair (k, 1) in one slot. k is from 0 in the frequency domain * Index given up to -1, where l is from 0 in the time domain Index given up to -1.
- Two RBs one in each of two slots of the subframe, occupying the same consecutive subcarriers, are called a physical resource block (PRB) pair.
- PRB physical resource block
- Two RBs constituting a PRB pair have the same PRB number (or also referred to as a PRB index).
- VRB is a kind of logical resource allocation unit introduced for resource allocation.
- VRB has the same size as PRB.
- FIG 3 illustrates a downlink (DL) subframe structure used in a 3GPP LTE / LTE-A system.
- a DL subframe is divided into a control region and a data region in the time domain.
- up to three (or four) OFDM symbols located in the first slot of a subframe correspond to a control region to which a control channel is allocated.
- a resource region available for PDCCH transmission in a DL subframe is called a PDCCH region.
- the remaining OFDM symbols other than the OFDM symbol (s) used as the control region correspond to a data region to which a Physical Downlink Shared CHannel (PDSCH) is allocated.
- PDSCH Physical Downlink Shared CHannel
- a resource region available for PDSCH transmission in a DL subframe is called a PDSCH region.
- Examples of DL control channels used in 3GPP LTE include a physical control format indicator channel (PCFICH), a physical downlink control channel (PDCCH), a physical hybrid ARQ indicator channel (PHICH), and the like.
- the PCFICH is transmitted in the first OFDM symbol of a subframe and carries information about the number of OFDM symbols used for transmission of a control channel within the subframe.
- the PHICH carries a Hybrid Automatic Repeat Request (HARQ) ACK / NACK (acknowledgment / negative-acknowledgment) signal in response to the UL transmission.
- HARQ Hybrid Automatic Repeat Request
- DCI downlink control information
- DL-SCH downlink shared channel
- UL-SCH uplink shared channel
- paging channel a downlink shared channel
- the transmission format and resource allocation information of a downlink shared channel may also be called DL scheduling information or a DL grant, and may be referred to as an uplink shared channel (UL-SCH).
- the transmission format and resource allocation information is also called UL scheduling information or UL grant.
- the DCI carried by one PDCCH has a different size and use depending on the DCI format, and its size may vary depending on a coding rate.
- various formats such as formats 0 and 4 for uplink and formats 1, 1A, 1B, 1C, 1D, 2, 2A, 2B, 2C, 3, and 3A are defined for uplink.
- Hopping flag RB allocation, modulation coding scheme (MCS), redundancy version (RV), new data indicator (NDI), transmit power control (TPC), and cyclic shift DMRS Control information such as shift demodulation reference signal (UL), UL index, CQI request, DL assignment index, HARQ process number, transmitted precoding matrix indicator (TPMI), and precoding matrix indicator (PMI) information
- MCS modulation coding scheme
- RV redundancy version
- NDI new data indicator
- TPC transmit power control
- cyclic shift DMRS Control information such as shift demodulation reference signal (UL), UL index, CQI request, DL assignment index, HARQ process number, transmitted precoding matrix indicator (TPMI), and precoding matrix indicator (PMI) information
- UL shift demodulation reference signal
- CQI request UL assignment index
- HARQ process number transmitted precoding matrix indicator
- PMI precoding matrix indicator
- the DCI format that can be transmitted to the UE depends on the transmission mode (TM) configured in the UE.
- TM transmission mode
- not all DCI formats may be used for a UE configured in a specific transmission mode, but only certain DCI format (s) corresponding to the specific transmission mode may be used.
- the PDCCH is transmitted on an aggregation of one or a plurality of consecutive control channel elements (CCEs).
- CCE is a logical allocation unit used to provide a PDCCH with a coding rate based on radio channel conditions.
- the CCE corresponds to a plurality of resource element groups (REGs). For example, one CCE corresponds to nine REGs and one REG corresponds to four REs.
- REGs resource element groups
- a CCE set in which a PDCCH can be located is defined for each UE.
- the set of CCEs in which a UE can discover its PDCCH is referred to as a PDCCH search space, simply a search space (SS).
- SS search space
- An individual resource to which a PDCCH can be transmitted in a search space is called a PDCCH candidate.
- the collection of PDCCH candidates that the UE will monitor is defined as a search space.
- a search space for each DCI format may have a different size, and a dedicated search space and a common search space are defined.
- the dedicated search space is a UE-specific search space and is configured for each individual UE.
- the common search space is configured for a plurality of UEs.
- An aggregation level defining the search space is as follows.
- One PDCCH candidate corresponds to 1, 2, 4 or 8 CCEs depending on the CCE aggregation level.
- the eNB sends the actual PDCCH (DCI) on any PDCCH candidate in the search space, and the UE monitors the search space to find the PDCCH (DCI).
- monitoring means attempting decoding of each PDCCH in a corresponding search space according to all monitored DCI formats.
- the UE may detect its own PDCCH by monitoring the plurality of PDCCHs. Basically, since the UE does not know where its PDCCH is transmitted, every Pframe attempts to decode the PDCCH until every PDCCH of the corresponding DCI format has detected a PDCCH having its own identifier. It is called blind detection (blind decoding).
- the eNB may transmit data for the UE or the UE group through the data area.
- Data transmitted through the data area is also called user data.
- a physical downlink shared channel (PDSCH) may be allocated to the data area.
- Paging channel (PCH) and downlink-shared channel (DL-SCH) are transmitted through PDSCH.
- the UE may read data transmitted through the PDSCH by decoding control information transmitted through the PDCCH.
- Information indicating to which UE or UE group data of the PDSCH is transmitted, how the UE or UE group should receive and decode PDSCH data, and the like are included in the PDCCH and transmitted.
- a specific PDCCH is masked with a cyclic redundancy check (CRC) with a Radio Network Temporary Identity (RNTI) of "A", a radio resource (eg, a frequency location) of "B” and a transmission of "C".
- CRC cyclic redundancy check
- RNTI Radio Network Temporary Identity
- format information eg, transport block size, modulation scheme, coding information, etc.
- a reference signal (RS) to be compared with the data signal is required.
- the reference signal refers to a signal of a predetermined special waveform that the eNB and the UE know each other, which the eNB transmits to the UE or the eNB, and is also called a pilot.
- Reference signals are divided into a cell-specific RS shared by all UEs in a cell and a demodulation RS (DM RS) dedicated to a specific UE.
- DM RS demodulation RS
- the DM RS transmitted by the eNB for demodulation of downlink data for a specific UE may be specifically referred to as a UE-specific RS.
- the DM RS and the CRS may be transmitted together, but only one of the two may be transmitted.
- the DM RS transmitted by applying the same precoder as the data may be used only for demodulation purposes, and thus RS for channel measurement should be separately provided.
- an additional measurement RS, CSI-RS is transmitted to the UE.
- the CSI-RS is transmitted every predetermined transmission period consisting of a plurality of subframes, unlike the CRS transmitted every subframe, based on the fact that the channel state is relatively not changed over time.
- FIG. 4 illustrates an example of an uplink (UL) subframe structure used in a 3GPP LTE / LTE-A system.
- the UL subframe may be divided into a control region and a data region in the frequency domain.
- One or several physical uplink control channels may be allocated to the control region to carry uplink control information (UCI).
- One or several physical uplink shared channels may be allocated to a data region of a UL subframe to carry user data.
- subcarriers having a long distance based on a direct current (DC) subcarrier are used as a control region.
- subcarriers located at both ends of the UL transmission bandwidth are allocated for transmission of uplink control information.
- the DC subcarrier is a component that is not used for signal transmission and is mapped to a carrier frequency f0 during frequency upconversion.
- the PUCCH for one UE is allocated to an RB pair belonging to resources operating at one carrier frequency in one subframe, and the RBs belonging to the RB pair occupy different subcarriers in two slots.
- the PUCCH allocated in this way is expressed as that the RB pair allocated to the PUCCH is frequency hopped at the slot boundary. However, if frequency hopping is not applied, RB pairs occupy the same subcarrier.
- PUCCH may be used to transmit the following control information.
- SR Service Request: Information used for requesting an uplink UL-SCH resource. It is transmitted using OOK (On-Off Keying) method.
- HARQ-ACK A response to a PDCCH and / or a response to a downlink data packet (eg, codeword) on a PDSCH. This indicates whether the PDCCH or PDSCH is successfully received.
- One bit of HARQ-ACK is transmitted in response to a single downlink codeword, and two bits of HARQ-ACK are transmitted in response to two downlink codewords.
- HARQ-ACK response includes a positive ACK (simple, ACK), negative ACK (hereinafter, NACK), DTX (Discontinuous Transmission) or NACK / DTX.
- the term HARQ-ACK is mixed with HARQ ACK / NACK, ACK / NACK.
- CSI Channel State Information
- MIMO Multiple Input Multiple Output
- RI rank indicator
- PMI precoding matrix indicator
- the amount of uplink control information (UCI) that a UE can transmit in a subframe depends on the number of SC-FDMA available for control information transmission.
- SC-FDMA available for UCI means the remaining SC-FDMA symbol except for the SC-FDMA symbol for transmitting the reference signal in the subframe, and in the case of a subframe including a Sounding Reference Signal (SRS), the last SC of the subframe
- SRS Sounding Reference Signal
- the -FDMA symbol is also excluded.
- the reference signal is used for coherent detection of the PUCCH.
- PUCCH supports various formats according to the transmitted information.
- Table 4 shows a mapping relationship between PUCCH format and UCI in LTE / LTE-A system.
- the PUCCH format 1 series is mainly used to transmit ACK / NACK information
- the PUCCH format 2 series is mainly used to carry channel state information (CSI) such as CQI / PMI / RI
- the PUCCH format 3 series is mainly used to transmit ACK / NACK information.
- a user equipment In the 3GPP LTE (-A) system, a user equipment (UE) is defined to report channel state information (CSI) to a base station (BS), and channel state information (CSI) is a radio formed between a UE and an antenna port.
- CSI channel state information
- RI represents rank information of a channel, which means the number of streams that a UE receives through the same time-frequency resource. Since this value is determined dependent on the long term fading of the channel, it is fed back from the UE to the BS with a period that is usually longer than PMI, CQI.
- PMI is a value reflecting channel spatial characteristics and indicates a precoding index preferred by the UE based on a metric such as SINR.
- CQI is a value indicating the strength of a channel and generally refers to a reception SINR obtained when a BS uses PMI.
- the UE Based on the measurement of the radio channel, the UE calculates a preferred PMI and RI that can derive an optimal or highest transmission rate if used by the BS under current channel conditions, and feeds back the calculated PMI and RI to the BS. do.
- CQI refers to a modulation and coding scheme that provides an acceptable packet error probability for the fed back PMI / RI.
- the current CSI feedback is defined in LTE and thus does not fully support those newly introduced operations.
- PMI becomes long term / wideband PMI (W 1 ) and short term ( It has been agreed to consist of two terms: short term) and subband PMI (W 2 ).
- W 1 * W 2 W 1 * W 2
- W W 2 * W 1 .
- the CSI will consist of RI, W 1 , W 2 and CQI.
- the uplink channel used for CSI transmission in the 3GPP LTE (-A) system is shown in Table 5 below.
- the CSI may be transmitted using a physical uplink control channel (PUCCH) at a period determined by a higher layer, and a physical uplink shared channel (Physical Uplink) is aperiodically required by a scheduler. It may be transmitted using a shared channel (PUSCH).
- the CSI is transmitted in the PUSCH only in case of frequency selective scheduling and aperiodic CSI transmission.
- a CSI transmission method according to a scheduling method and a periodicity will be described.
- a control signal for requesting transmission of CSI may be included in a PUSCH scheduling control signal (UL Grant) transmitted through a PDCCH signal.
- UL Grant PUSCH scheduling control signal
- the following table shows a mode of a UE when transmitting CQI, PMI, RI through PUSCH.
- the transmission mode of Table 6 is selected in the upper layer, and all CQI / PMI / RI are transmitted in the same PUSCH subframe.
- Table 6 an uplink transmission method of a UE according to each mode will be described.
- Mode 1-2 represents a case in which a precoding matrix is selected on the assumption that data is transmitted only through subbands for each subband.
- the UE generates a CQI assuming the selected precoding matrix for the entire band (set S) designated by the system band or the upper layer.
- the UE may transmit the CQI and the PMI value of each subband.
- the size of each subband may vary depending on the size of the system band.
- the UE in mode 2-0 may select the preferred M subbands for the designated band set S designated by the system band or the upper layer.
- the UE may generate one CQI value on the assumption that data is transmitted for the selected M subbands.
- the UE further preferably reports one wideband CQI (CQI) value for the system band or set S.
- CQI wideband CQI
- the UE defines a CQI value for each codeword in a differential format.
- the differential CQI value is determined as a difference value between an index corresponding to the CQI values for the selected M subbands and a wideband CQI (WB-CQI) index.
- the UE in mode 2-0 transmits information on the location of the selected M subbands, one CQI value for the selected M subbands, and a CQI value generated for all bands or a set band (set S) to the BS.
- the size of the subband and the M value may vary depending on the size of the system band.
- a UE in mode 2-2 transmits data on M preferred subbands, it simultaneously selects the locations of the M preferred subbands and a single precoding matrix for the M preferred subbands. Can be.
- CQI values for M preferred subbands are defined for each codeword.
- the UE further generates wideband CQI (wideband CQI) values for the system band or the set band (set S).
- the UE in mode 2-2 is configured with information on the location of the M preferred subbands, one CQI value for the selected M subbands, a single PMI for the M preferred subbands, a wideband PMI, and a wideband CQI value. Can transmit to BS.
- the size of the subband and the M value may vary depending on the size of the system band.
- the UE in mode 3-0 generates a wideband CQI value.
- the UE generates a CQI value for each subband assuming that data is transmitted on each subband. At this time, even if RI> 1, the CQI value represents only the CQI value for the first codeword.
- the UE in mode 3-1 generates a single precoding matrix for the system band or the set band (set S).
- the UE assumes the previously generated single precoding matrix for each subband and generates subband CQI for each codeword.
- the UE may assume a single precoding matrix and generate a wideband CQI.
- the CQI value of each subband may be expressed in a difference form.
- the subband CQI value is calculated as a difference between the subband CQI index and the wideband CQI index.
- the size of the subband may vary depending on the size of the system band.
- a UE in mode 3-2 generates a precoding matrix for each subband, instead of a single precoding matrix for the entire band, compared to mode 3-1.
- the UE may periodically transmit CSI (e.g. CQI / PMI / PTI (precoding type indicator) and / or RI information) to the BS through the PUCCH. If the UE receives a control signal for transmitting user data, the UE may transmit the CQI through the PUCCH. Even if the control signal is transmitted through the PUSCH, the CQI / PMI / PTI / RI may be transmitted by one of the modes defined in the following table.
- CSI e.g. CQI / PMI / PTI (precoding type indicator) and / or RI information
- the UE may have a transmission mode as shown in Table 7.
- the bandwidth part (BP) is a set of subbands continuously located in the frequency domain. It can cover both the system band or the set band (set S).
- the size of each subband, the size of the BP, and the number of BPs may vary depending on the size of the system band.
- the UE transmits the CQI in ascending order in the frequency domain for each BP so as to cover the system band or the set band (set S).
- the UE may have the following PUCCH transmission type.
- Type 1 transmits subband CQI (SB-CQI) of mode 2-0, mode 2-1.
- Type 1a transmit subband CQI and second PMI
- Type 2b transmit wideband CQI and PMI (WB-CQI / PMI).
- Type 2a transmit wideband PMI.
- Type 3 transmit RI.
- Type 4 Send wideband CQI.
- Type 5 transmit RI and wideband PMI.
- Type 6 Send RI and PTI.
- the CQI / PMI is transmitted in subframes having different periods and offsets.
- CQI / PMI is not transmitted.
- a 2-bit CSI request field is used in DCI format 0 or 4 to operate aperiodic CSI feedback.
- the terminal interprets the CSI request field as 2-bit when receiving multiple serving cells in a CA environment. If one of the TMs 1 through 9 is set for all CCs, aperiodic CSI feedback is triggered according to the values in Table 8 below, and TM 10 is turned on for at least one of all CCs. If set, aperiodic CSI feedback is triggered according to the values in Table 9 below.
- Table 8 CSI request field value detailed description '00' Aperiodic CSI reporting not triggered '01' Aperiodic CSI reporting is triggered for the serving cell '10' Aperiodic CSI reporting is triggered for the first set of serving cells set by higher layer '11' Aperiodic CSI reporting is triggered for the second set of serving cells set by higher layer
- Table 9 CSI request field value detailed description '00' Aperiodic CSI reporting not triggered '01' Aperiodic CSI reporting is triggered for a set of CSI processes set up by higher layers for serving cells '10' Aperiodic CSI reporting is triggered for the first set of CSI processes set up by higher layers '11' Aperiodic CSI reporting is triggered for a second set of CSI processes set up by higher layers
- AAS active antenna system
- a transmission / reception scheme according to the introduction / use of 2D-AAS is referred to as elevation beamforming (EB) / full dimension (FD) -MIMO.
- the base station may configure several CSI-RS resources in one CSI process for the UE.
- the UE does not regard a CSI-RS resource set in one CSI process as an independent channel, aggregates the corresponding resources, assumes one huge CSI-RS resource, and calculates and feeds back CSI from the resource.
- the base station sets three 4-port CSI-RS resources in one CSI process to the UE, and the UE aggregates them to assume one 12-port CSI-RS resource. From this resource, the 12 port PMI can be used to calculate and feed back the CSI.
- the base station may configure several CSI-RS resources in one CSI process for the UE.
- eight CSI-RS resources may be configured in one CSI process, and eight CSI-RS resources may be configured as four port CSI-RSs, respectively.
- Each of the eight four-port CSI-RSs has different beamforming as different virtualization is applied.
- CSI-RS corresponding to the first is vertical beamforming at a zenith angle of 100 degrees
- CSI-RS is set with a zenith angle difference of 5 degrees
- CSI-RS corresponding to the eighth is Vertical beamforming may be applied at a ceiling angle of 135 degrees.
- CRI CSI-RS resource indicator
- K means the number of CSI-RS resources present in the CSI process.
- N k means the number of CSI-RS ports of the k-th CSI-RS resource.
- K 8 and N k is set to 4 regardless of the k value.
- CRI indicates a specific CSI-RS resource
- CRI may be further embodied as indicating a specific port combination to a specific CSI-RS.
- the CRI may be embodied by selecting one of eight CSI-RSs in the CSI process and a combination of ports 15 and 16 within the additionally selected CSI-RS.
- the CRI represents one of 16 values (that is, an integer value between 0 and 15), with each value totaling One of the 16 CSI-RSs is indicated.
- CSI-RS resources are placed in one CSI process, and each resource is considered to be shown to the UE through different precoding.
- K CSI-RS resources with N k ports within the total N total number of antenna ports in one CSI process, and transmit different vertical (or 2D) precodings to each CSI-RS resource.
- what precoding is applied may be transparent to the terminal.
- the terminal measures a channel for each resource, selects the best resource among them, and transmits information corresponding to the corresponding precoding or resource index to the base station, and the base station transmits the data for the terminal to the precoding or the resource. This is done using precoding on the resources of the index.
- the terminal reports a beam index (BI) to the base station.
- the UE may select a resource to be used for data transmission according to a CSI or the like and transmit a corresponding resource or an index of precoding to the base station, which may be a periodic report through a PUCCH or an aperiodic report through a PUSCH.
- the BI may be regarded as one of the CSIs and may be transmitted together with other aperiodic CSIs.
- the terminal may receive the aperiodic CSI through the PUSCH.
- the UE may transmit the BI together only at some time points of the aperiodic CSI report. This is because frequent BI reporting is inefficient because of the fast-changing nature of BI. In addition, in order to obtain the BI, it is necessary to perform CSI calculation for each CSI-RS resource, because this may be a burden on the UE.
- the base station may set the "BI reporting interval" to the terminal. This means 'effective' time after the BI is transmitted, and at the same time, it means a period in which the UE does not need to transmit a new BI to the base station.
- This "BI reporting interval” may be defined as follows.
- the set "BI reporting period” operates as a "BI expiration timer", which means a period in which a new BI is not required to be transmitted to the base station during the "BI expiration timer" defined after the reporting time of the A-CSI. 6 illustrates the operation of the terminal according to the BI expiration timer.
- the terminal since the first A-CSI report is transmitted with the BI, since the second A-CSI report has not yet passed the "BI expiration timer" after the A-CSI report, the UE does not include the BI. Send CSI. Since the third A-CSI report is after the "BI expiration timer" has passed since the first A-CSI report (BI report), the terminal transmits the BI and A-CSI together.
- the baseline reference time point of the "BI expiration timer" may be set to another time point in addition to the A-CSI report time point.
- the request time of the A-CSI may be used as the reference reference time of the BI expiration timer.
- the UE when the UE includes the BI in the A-CSI report corresponding to the A-CSI request, the UE includes the BI in the A-CSI request received from the base station after the BI expiration timer has passed after the A-CSI request.
- A-CSI reporting may be performed.
- the set "BI report period" may operate as a BI window.
- the A-CSI reporting time point is divided into a BI window, and the terminal means that the BI report is performed only once through the A-CSI within one BI window. This operation is shown in FIG.
- the UE since the first and second A-CSI reports are the first A-CSI reports in each BI window, the UE transmits A-CSI along with the BI. However, the third A-CSI report is the second report in the BI window, so A-CSI is not A-. CSI may be transmitted.
- the A-CSI report of the "report-based BI window” may operate on the A-CSI request basis. This means that the A-CSI request time is divided into BI windows, and there is only one A-CSI request in which A-CSI reporting including BI is made in one BI window. This operation is shown in FIG.
- the UE may transmit the A-CSI report along with the BI to the A-CSI report corresponding to each A-CSI request. Since the second A-CSI request is the second A-CSI request in the BI window, the UE may report the A-CSI without BI.
- the "BI reporting period” should be agreed or signaled between the base station and the terminal. To this end, the corresponding window size is determined in advance, and may operate without additional signaling. Or, it may be transmitted through higher layer signaling such as RRC signaling or dynamic signaling such as DCI. The signaling can be done either explicitly or implicitly. In particular, without a separate "BI reporting interval” signaling, it is possible to use a "BI reporting interval” such as BI feedback periodicity (for example, an integer multiple of the RI period) of the PUCCH transmitted to the RRC.
- BI feedback periodicity for example, an integer multiple of the RI period
- a separate BI window offset may be transmitted together with the BI report interval to know the location of the BI window.
- the BI report offset of the PUCCH transmitted to the RRC can also be used as the BI window offset of the PUSCH. 9 shows an example of setting a BI window according to the BI window offset.
- the UE When reporting "A-CSI without BI" in the present invention, the UE may be defined or set to calculate and report the A-CSI for the CSI-RS resource corresponding to the most recently reported BI.
- the part of transmitting the A-CSI not including the BI in the above description may be replaced by the operation of transmitting the included A-CSI without updating the previously transmitted BI. . That is, at the time of transmitting the A-CSI with the BI, the UE transmits the A-CSI including the BI calculated based on the CSI or the like as described above, and most at the time of transmitting the A-CSI without the BI. It may be replaced by an operation for transmitting A-CSI including the recently calculated BI as it is. In this case, at the time of transmitting the A-CSI together with the BI which has not been updated, it may be defined / set as calculating and reporting the A-CSI for the CSI-RS resource corresponding to the BI.
- the K CSI-RS resources (K is the number of CSI-RS resources present in the CSI process) are included in one CSI process, and the CSI-RS resources are selected and applied to BI through BI. Is used for downlink data transmission is called FD-MIMO class B.
- the CSI process for the UE may include legacy or FD-MIMO class A CSI processes other than FD-MIMO class B.
- FD-MIMO class A does not use BI reporting, and one CSI resource extends compared to legacy CSI resources by having more port numbers (eg, 16) or aggregating two or more CSI resources. Refers to an FD-MIMO scheme using a CSI process having a number of (eg, 16) ports.
- K i i is the CSI process index.
- the UE If there is an unreported A-CSI for more than one CSI process (including legacy CSI process, FD-MIMO class A, FD-MIMO class B CSI process) (for example, the UE is a FD-MIMO class B CSI)
- the UE requests the aperiodic CSI request.
- K th , R and R c may be previously defined at both sides of the base station and the terminal (eg, with UE performance signaling), or may be configured by the base station with a higher layer signaling such as RRC.
- the techniques included herein may be used alone or in combination.
- the "existing CSI relaxation" (described in the following "reference") considering the CA situation and the CRI (BI) mitigation operation considered in the present invention may be combined and applied together.
- the FD-MIMO Class B (or FD-MIMO Class A) CSI process may also be defined / set to be applied to the following existing CSI mitigation rules in a form that is regarded as one CSI process. Accordingly, if a particular FD-MIMO Class B CSI process (s) is considered to be a "CSI process that does not need to be updated" (considering N u CSI processes not reported below, etc.), all applicable CRI / CSI reporting must be completed. The decision may be made first not to update.
- the UE is not expected to receive more than one CSI report request in a given single subframe.
- the terminal receives another aperiodic CSI request for the serving cell. All CSI processes except max (N x -N u , 0) low-index CSI processes for the serving cell associated with the received aperiodic CSI report request when there are Nu unreported CSI processes associated with the Is not expected to update the CSI corresponding to the CSI reference resource for the CSI reference resource, where the CSI process associated with the CSI request should be counted as not reported in the subframe prior to the subframe in which the PUSCH carrying the corresponding CSI was sent.
- N CSI-P is the maximum number of CSI processes supported by the terminal for the serving cell, and:
- N x N CSI-P for FDD serving cells
- N x N CSI-P
- N x 3.
- the UE assumes a value of N CSI-P that matches its CSI process configuration. If there is a matching value of more than one N CSI-P , the terminal may assume any value of the matching values.
- the terminal If the terminal is configured with a plurality of cell groups and the terminal receives a plurality of aperiodic CSI report requests in a subframe for different cell groups triggering more than one CSI report, the terminal receives all triggered CSI reports.
- the CSI for more than five CSI processes among the corresponding CSI processes need not be updated.
- the mitigation may be applied to the A-CSI report that should be transmitted within 5 ms as described above. This 5ms may be previously defined / set to another value.
- the conditions under which the CRI mitigation will be applied may be defined / set in the following form:
- the CRI may always be reported in the same subframe as the CSI.
- the terminal receiving the aperiodic CSI report request for the CSI process may not be expected to update the CRI if the last updated CRI was reported within 5 ms of the time point of the aperiodic CSI report according to the received request. Can be.
- the above methods can be extended in combination with the CA situation.
- the UE may signal up to how many such Class B CSI processes can be configured (across CCs) during UE capability signaling.
- the 10 relates to a method for aperiodic channel state reporting in a wireless communication system.
- the method may be performed by the terminal 101.
- the method may be performed by a terminal.
- the terminal may receive, from the base station, settings for one or more CSI processes including a plurality of channel state information-reference signal (CSI-RS) resources. Precoding may be applied to each of the plurality of CSI-RS resources.
- CSI-RS channel state information-reference signal
- the terminal may receive aperiodic channel state information (CSI) report request from the base station (S1010).
- the terminal may transmit the aperiodic CSI for the CSI process indicated by the received aperiodic CSI report request to the base station (S1030).
- the transmitted aperiodic CSI is a CSI-RS resource index for the CSI process that has not been updated if a predetermined time has not elapsed since the CSI-RS resource index for the CSI process indicated by the aperiodic CSI report request was reported. It may include.
- the remaining channel state related information in the transmitted aperiodic CSI may be calculated on the CSI-RS resource indicated by the CSI-RS resource index.
- the predetermined time may be a time corresponding to five subframes.
- the CSI-RS resource index may always be transmitted with other channel state related information.
- the transmitted aperiodic CSI has not exceeded a specific time since the CSI-RS resource index for the CSI process indicated by the aperiodic CSI report request has been reported and the total antennas for all the CSI-RS resources of the CSI process. If the number of ports exceeds the threshold, it may include a CSI-RS resource index for the CSI process that has not been updated.
- the transmitted aperiodic CSI does not exceed a specific time after the CSI-RS resource index for the CSI process indicated by the aperiodic CSI report request is reported and the number of the plurality of CSI-RS resources exceeds a threshold. It may include a CSI-RS resource index for the CSI process that is not updated.
- FIG. 10 may alternatively or additionally include at least some of the above-described embodiment (s).
- FIG. 11 is a block diagram illustrating components of a transmitter 10 and a receiver 20 that perform embodiments of the present invention.
- the transmitter 10 and the receiver 20 are associated with transmitters / receivers 13 and 23 capable of transmitting or receiving radio signals carrying information and / or data, signals, messages, etc.
- Memory 12, 22 for storing a variety of information, the transmitter / receiver 13, 23 and the memory 12, 22 and the like is operatively connected to control the components to control the components described above
- the memories 12 and 22 may store a program for processing and controlling the processors 11 and 21, and may temporarily store input / output information.
- the memories 12 and 22 may be utilized as buffers.
- the processors 11 and 21 typically control the overall operation of the various modules in the transmitter or receiver. In particular, the processors 11 and 21 may perform various control functions for carrying out the present invention.
- the processors 11 and 21 may also be called controllers, microcontrollers, microprocessors, microcomputers, or the like.
- the processors 11 and 21 may be implemented by hardware or firmware, software, or a combination thereof.
- firmware or software When implementing the present invention using hardware, application specific integrated circuits (ASICs) or digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs ( field programmable gate arrays) may be provided in the processors 11 and 21.
- ASICs application specific integrated circuits
- DSPs digital signal processors
- DSPDs digital signal processing devices
- PLDs programmable logic devices
- FPGAs field programmable gate arrays
- firmware or software may be configured to include a module, a procedure, or a function for performing the functions or operations of the present invention, and configured to perform the present invention.
- the firmware or software may be provided in the processors 11 and 21 or stored in the memory 12 and 22 to be driven by the processors 11 and 21.
- the processor 11 of the transmission apparatus 10 is predetermined from the processor 11 or a scheduler connected to the processor 11 and has a predetermined encoding and modulation on a signal and / or data to be transmitted to the outside. After performing the transmission to the transmitter / receiver (13). For example, the processor 11 converts the data sequence to be transmitted into K layers through demultiplexing, channel encoding, scrambling, and modulation.
- the coded data string is also called a codeword and is equivalent to a transport block, which is a data block provided by the MAC layer.
- One transport block (TB) is encoded into one codeword, and each codeword is transmitted to a receiving device in the form of one or more layers.
- the transmitter / receiver 13 may include an oscillator for frequency upconversion.
- the transmitter / receiver 13 may include Nt transmit antennas, where Nt is a positive integer greater than or equal to one.
- the signal processing of the receiver 20 is the reverse of the signal processing of the transmitter 10.
- the transmitter / receiver 23 of the receiver 20 receives a radio signal transmitted by the transmitter 10.
- the transmitter / receiver 23 may include Nr receive antennas, and the transmitter / receiver 23 frequency down-converts each of the signals received through the receive antennas to restore baseband signals. do.
- Transmitter / receiver 23 may include an oscillator for frequency downconversion.
- the processor 21 may decode and demodulate a radio signal received through a reception antenna to restore data originally transmitted by the transmission apparatus 10.
- the transmitter / receiver 13, 23 is equipped with one or more antennas.
- the antenna transmits a signal processed by the transmitter / receiver 13, 23 to the outside or receives a radio signal from the outside under the control of the processors 11 and 21, thereby transmitting / receiving the transmitter / receiver. It performs the function of forwarding to (13, 23).
- Antennas are also called antenna ports.
- Each antenna may correspond to one physical antenna or may be configured by a combination of more than one physical antenna elements.
- the signal transmitted from each antenna can no longer be decomposed by the receiver 20.
- a reference signal (RS) transmitted in correspondence with the corresponding antenna defines the antenna as viewed from the perspective of the receiver 20, and whether the channel is a single radio channel from one physical antenna or includes the antenna.
- RS reference signal
- the receiver 20 enables channel estimation for the antenna. That is, the antenna is defined such that a channel carrying a symbol on the antenna can be derived from the channel through which another symbol on the same antenna is delivered.
- MIMO multi-input multi-output
- the terminal or the UE operates as the transmitter 10 in the uplink and the receiver 20 in the downlink.
- the base station or eNB operates as the receiving device 20 in the uplink, and operates as the transmitting device 10 in the downlink.
- the transmitter and / or the receiver may perform at least one or a combination of two or more of the embodiments of the present invention described above.
- the present invention can be used in a wireless communication device such as a terminal, a relay, a base station, and the like.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
DL-UL configuration | Downlink-to-Uplink Switch-point periodicity | Subframe number | |||||||||
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ||
0 | 5ms | D | S | U | U | U | D | S | U | U | U |
1 | 5ms | D | S | U | U | D | D | S | U | U | D |
2 | 5ms | D | S | U | D | D | D | S | U | D | D |
3 | 10ms | D | S | U | U | U | D | D | D | D | D |
4 | 10ms | D | S | U | U | D | D | D | D | D | D |
5 | 10ms | D | S | U | D | D | D | D | D | D | D |
6 | 5ms | D | S | U | U | U | D | S | U | U | D |
Special subframe configuration | Normal cyclic prefix in downlink | Extended cyclic prefix in downlink | ||||
DwPTS | UpPTS | DwPTS | UpPTS | |||
Normal cyclic prefix in uplink | Extended cyclic prefix in uplink | Normal cyclic prefix in uplink | Extended cyclic prefix in uplink | |||
0 | 6592·Ts | 2192·Ts | 2560·Ts | 7680·Ts | 2192·Ts | 2560·Ts |
1 | 19760·Ts | 20480·Ts | ||||
2 | 21952·Ts | 23040·Ts | ||||
3 | 24144·Ts | 25600·Ts | ||||
4 | 26336·Ts | 7680·Ts | 4384·Ts | 5120·Ts | ||
5 | 6592·Ts | 4384·Ts | 5120·Ts | 20480·Ts | ||
6 | 19760·Ts | 23040·Ts | ||||
7 | 21952·Ts | 12800·Ts | ||||
8 | 24144·Ts | - | - | - | ||
9 | 13168·Ts | - | - | - |
Search Space SK (L) | Number of PDCCH candidates M(L) | ||
Type | Aggregation Level L | Size[in CCEs] | |
UE-specific | 1 | 6 | 6 |
2 | 12 | 6 | |
4 | 8 | 2 | |
8 | 16 | 2 | |
Common | 4 | 16 | 4 |
8 | 16 | 2 |
PUCCH format | Modulation scheme | Number of bits per subframe | Usage | Etc. |
1 | N/A | N/A (exist or absent) | SR (Scheduling Request) | |
1a | BPSK | 1 | ACK/NACK orSR + ACK/NACK | One codeword |
1b | QPSK | 2 | ACK/NACK orSR + ACK/NACK | Two codeword |
2 | QPSK | 20 | CQI/PMI/RI | Joint coding ACK/NACK (extended CP) |
2a | QPSK+BPSK | 21 | CQI/PMI/RI + ACK/NACK | Normal CP only |
2b | QPSK+QPSK | 22 | CQI/PMI/RI + ACK/NACK | Normal CP only |
3 | QPSK | 48 | ACK/NACK orSR + ACK/NACK orCQI/PMI/RI + ACK/NACK |
스케줄링 방식 | 주기적 CSI 전송 | 비주기적 CSI 전송 |
주파수 비선택적 | PUCCH | - |
주파수 선택적 | PUCCH | PUSCH |
PMI 피드백 타입 | |||
No PMI | 단일 PMI | ||
PUCCH CQI 피드백 타입 | 광대역(광대역 CQI) | Mode 1-0 | Mode 1-1 |
UE 선택(서브밴드 CQI) | Mode 2-0 | Mode 2-1 |
CSI 요청 필드 값 | 상세 설명 |
'00' | 비주기적 CSI 보고가 트리거링되지 않음 |
'01' | 비주기적 CSI 보고가 서빙 셀에 대해 트리거링됨 |
'10' | 비주기적 CSI 보고가 상위 계층에 의해 설정된 제1 집합의 서빙 셀들에 대해 트리거링됨 |
'11' | 비주기적 CSI 보고가 상위 계층에 의해 설정된 제2 집합의 서빙 셀들에 대해 트리거링됨 |
CSI 요청 필드 값 | 상세 설명 |
'00' | 비주기적 CSI 보고가 트리거링되지 않음 |
'01' | 비주기적 CSI 보고가 서빙 셀을 위해 상위 계층에 의해 설정된 CSI 프로세스 집합에 대해 트리거링됨 |
'10' | 비주기적 CSI 보고가 상위 계층에 의해 설정된 제1 집합의 CSI 프로세스에 대해 트리거링됨 |
'11' | 비주기적 CSI 보고가 상위 계층에 의해 설정된 제2 집합의 CSI 프로세스에 대해 트리거링됨 |
Claims (12)
- 무선 통신 시스템에서 비주기적 채널 상태 보고를 위한 방법에 있어서, 상기 방법은 단말에 의해 수행되며,복수의 채널 상태 정보-참조 신호(channel state information-reference signal; CSI-RS) 자원을 포함한 하나 이상의 CSI 프로세스에 대한 설정을 기지국으로부터 수신하는 단계, 상기 복수의 CSI-RS 자원 각각에 프리코딩이 적용되고;상기 기지국으로부터 비주기적 CSI(channel state information) 보고 요청을 수신하는 단계; 및상기 수신된 비주기적 CSI 보고 요청이 지시하는 CSI 프로세스에 대한 비주기적 CSI를 상기 기지국으로 전송하는 단계를 포함하고,상기 전송되는 비주기적 CSI는:상기 비주기적 CSI 보고 요청이 지시하는 CSI 프로세스를 위한 CSI-RS 자원 인덱스가 보고된 후 일정 시간이 경과하지 않았으면, 갱신되지 않은 상기 CSI 프로세스에 대한 CSI-RS 자원 인덱스를 포함하는 것을 특징으로 하는, 비주기적 채널 상태 보고 방법.
- 제1항에 있어서, 상기 전송되는 비주기적 CSI 내 나머지 채널 상태 관련 정보들은 상기 CSI-RS 자원 인덱스가 지시하는 CSI-RS 자원 상에서 계산되는 것을 특징으로 하는, 비주기적 채널 상태 보고 방법.
- 제1항에 있어서, 상기 일정 시간은 5개 서브프레임에 대응하는 시간인 것을 특징으로 하는, 비주기적 채널 상태 보고 방법.
- 제1항에 있어서, 상기 CSI-RS 자원 인덱스는 다른 채널 상태 관련 정보와 항상 함께 전송되는 것을 특징으로 하는, 비주기적 채널 상태 보고 방법.
- 제1항에 있어서, 상기 전송되는 비주기적 CSI는:상기 비주기적 CSI 보고 요청이 지시하는 CSI 프로세스를 위한 CSI-RS 자원 인덱스가 보고된 후 특정 시간이 도과하지 않았고 상기 CSI 프로세스의 모든 CSI-RS 자원에 대한 전체 안테나 포트 수가 임계치를 초과하면, 갱신되지 않은 상기 CSI 프로세스에 대한 CSI-RS 자원 인덱스를 포함하는, 비주기적 채널 상태 보고 방법.
- 제1항에 있어서, 상기 전송되는 비주기적 CSI는:상기 비주기적 CSI 보고 요청이 지시하는 CSI 프로세스를 위한 CSI-RS 자원 인덱스가 보고된 후 특정 시간이 도과하지 않았고 상기 복수의 CSI-RS 자원의 수가 임계치를 초과하면, 갱신되지 않은 상기 CSI 프로세스에 대한 CSI-RS 자원 인덱스를 포함하는, 비주기적 채널 상태 보고 방법.
- 무선 통신 시스템에서 비주기적 채널 상태를 보고하도록 구성된 단말로서,송신기;수신기; 및상기 송신기 및 상기 수신기를 제어하도록 구성된 프로세서를 포함하고,상기 프로세서는:복수의 채널 상태 정보-참조 신호(channel state information-reference signal; CSI-RS) 자원을 포함한 하나 이상의 CSI 프로세스에 대한 설정을 기지국으로부터 수신하고, 상기 복수의 CSI-RS 자원 각각에 프리코딩이 적용되고;상기 기지국으로부터 비주기적 CSI(channel state information) 보고 요청을 수신하고, 그리고상기 수신된 비주기적 CSI 보고 요청이 지시하는 CSI 프로세스에 대한 비주기적 CSI를 상기 기지국으로 전송하도록 구성되고,상기 전송되는 비주기적 CSI는:상기 비주기적 CSI 보고 요청이 지시하는 CSI 프로세스를 위한 CSI-RS 자원 인덱스가 보고된 후 일정 시간이 경과하지 않았으면, 갱신되지 않은 상기 CSI 프로세스에 대한 CSI-RS 자원 인덱스를 포함하는 것을 특징으로 하는, 단말.
- 제7항에 있어서,상기 전송되는 비주기적 CSI 내 나머지 채널 상태 관련 정보들은 상기 CSI-RS 자원 인덱스가 지시하는 CSI-RS 자원 상에서 계산되는 것을 특징으로 하는, 단말.
- 제7항에 있어서, 상기 일정 시간은 5개 서브프레임에 대응하는 시간인 것을 특징으로 하는, 단말.
- 제7항에 있어서, 상기 CSI-RS 자원 인덱스는 다른 채널 상태 관련 정보와 항상 함께 전송되는 것을 특징으로 하는, 단말.
- 제7항에 있어서, 상기 전송되는 비주기적 CSI는:상기 비주기적 CSI 보고 요청이 지시하는 CSI 프로세스를 위한 CSI-RS 자원 인덱스가 보고된 후 특정 시간이 도과하지 않았고 상기 CSI 프로세스의 모든 CSI-RS 자원에 대한 전체 안테나 포트 수가 임계치를 초과하면, 갱신되지 않은 상기 CSI 프로세스에 대한 CSI-RS 자원 인덱스를 포함하는, 단말.
- 제7항에 있어서, 상기 전송되는 비주기적 CSI는:상기 비주기적 CSI 보고 요청이 지시하는 CSI 프로세스를 위한 CSI-RS 자원 인덱스가 보고된 후 특정 시간이 도과하지 않았고 상기 복수의 CSI-RS 자원의 수가 임계치를 초과하면, 갱신되지 않은 상기 CSI 프로세스에 대한 CSI-RS 자원 인덱스를 포함하는, 단말.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020187009132A KR102105962B1 (ko) | 2015-11-03 | 2016-10-31 | 무선 통신 시스템에서 채널 상태 보고 방법 및 이를 위한 장치 |
US15/773,097 US10374664B2 (en) | 2015-11-03 | 2016-10-31 | Method for reporting channel state in wireless communication system and apparatus therefor |
CN201680063902.7A CN108352879B (zh) | 2015-11-03 | 2016-10-31 | 用于在无线通信系统中报告信道状态的方法及其设备 |
EP16862354.4A EP3373469A4 (en) | 2015-11-03 | 2016-10-31 | METHOD FOR INDICATING THE CHANNEL STATUS IN A WIRELESS COMMUNICATION SYSTEM AND DEVICE THEREFOR |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201562250489P | 2015-11-03 | 2015-11-03 | |
US62/250,489 | 2015-11-03 | ||
US201562256693P | 2015-11-17 | 2015-11-17 | |
US62/256,693 | 2015-11-17 | ||
US201562257225P | 2015-11-18 | 2015-11-18 | |
US62/257,225 | 2015-11-18 | ||
US201562257621P | 2015-11-19 | 2015-11-19 | |
US62/257,621 | 2015-11-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017078338A1 true WO2017078338A1 (ko) | 2017-05-11 |
Family
ID=58662903
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2016/012338 WO2017078338A1 (ko) | 2015-11-03 | 2016-10-31 | 무선 통신 시스템에서 채널 상태 보고 방법 및 이를 위한 장치 |
Country Status (5)
Country | Link |
---|---|
US (1) | US10374664B2 (ko) |
EP (1) | EP3373469A4 (ko) |
KR (1) | KR102105962B1 (ko) |
CN (1) | CN108352879B (ko) |
WO (1) | WO2017078338A1 (ko) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110692278A (zh) * | 2017-05-27 | 2020-01-14 | 高通股份有限公司 | 用于联合的上行链路数据和信道状态信息反馈的信令设计 |
CN111386661A (zh) * | 2017-09-29 | 2020-07-07 | Lg电子株式会社 | 无线通信系统中非周期性的csi的报告方法及其装置 |
CN111903101A (zh) * | 2018-03-29 | 2020-11-06 | 中兴通讯股份有限公司 | 无线通信中的信道状态信息报告 |
CN114600387A (zh) * | 2019-08-13 | 2022-06-07 | 三星电子株式会社 | 用于在无线通信系统中报告信道状态信息的方法和装置 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10602389B2 (en) * | 2015-08-13 | 2020-03-24 | Lg Electronics Inc. | Method for reporting channel state information of terminal in wireless communication system and device using the method |
KR102574954B1 (ko) * | 2015-08-13 | 2023-09-05 | 삼성전자주식회사 | 통신 시스템에서 기준 신호를 송수신하는 방법 및 장치 |
US11088749B2 (en) * | 2016-02-25 | 2021-08-10 | Apple Inc. | Device and method of using BRRS configuration |
EP3471314B1 (en) * | 2016-08-11 | 2021-10-27 | LG Electronics Inc. | Method for reporting channel state in wireless communication system and device therefor |
US10707939B2 (en) * | 2017-10-03 | 2020-07-07 | Mediatek Inc. | Codebook-based uplink transmission in wireless communications |
US20210391906A1 (en) * | 2018-08-08 | 2021-12-16 | Idac Holdings, Inc. | Csi feedback in nr-u |
EP4156763B1 (en) * | 2019-03-19 | 2024-05-08 | LG Electronics, Inc. | Sl csi report |
US20220239360A1 (en) * | 2019-05-03 | 2022-07-28 | Telefonaktiebolaget Lm Ericsson (Publ) | Csi omission rules for enhanced type ii csi reporting |
CN114531956A (zh) * | 2019-09-24 | 2022-05-24 | 三星电子株式会社 | 用于在无线通信系统中发送和接收数据的方法和装置 |
US11963212B2 (en) * | 2019-10-03 | 2024-04-16 | Qualcomm Incorporated | Using null resource elements for demodulation interference estimation |
WO2021087959A1 (en) * | 2019-11-08 | 2021-05-14 | Mediatek Inc. | Procedure of csi-rs configuration update, tci switching, and spatial relation switch |
EP4061034A4 (en) * | 2019-11-15 | 2023-07-19 | Ntt Docomo, Inc. | COMMUNICATION TERMINAL AND METHOD |
EP4309298A1 (en) * | 2021-03-19 | 2024-01-24 | Telefonaktiebolaget LM Ericsson (publ) | Vision-assisted safe mode handling in wireless communication networks |
WO2023133761A1 (zh) * | 2022-01-13 | 2023-07-20 | 北京小米移动软件有限公司 | Csi报告的发送方法、接收方法、装置、设备及介质 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130028182A1 (en) * | 2011-02-18 | 2013-01-31 | Qualcomm Incorporated | Implicitly linking aperiodic channel state information (a-csi) reports to csi-reference signal (csi-rs) resources |
KR20150039746A (ko) * | 2012-07-23 | 2015-04-13 | 엘지전자 주식회사 | 무선 통신 시스템에서 csi-rs 측정 및 보고 방법과 이를 지원하는 장치 |
KR20150060916A (ko) * | 2012-10-24 | 2015-06-03 | 지티이 코포레이션 | 채널 상태 정보를 확정하는 방법 및 단말 |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4652420B2 (ja) | 2008-01-08 | 2011-03-16 | 株式会社エヌ・ティ・ティ・ドコモ | ユーザ装置、送信方法、および移動通信システム |
EP2148525B1 (en) * | 2008-07-24 | 2013-06-05 | Oticon A/S | Codebook based feedback path estimation |
CN102804895B (zh) | 2009-06-02 | 2017-04-12 | 太阳专利信托公司 | 终端装置和终端装置中的发送方法 |
US8958838B2 (en) * | 2010-02-12 | 2015-02-17 | Qualcomm Incorporated | Multi-stage transmit power control scheme for access point |
KR101253197B1 (ko) * | 2010-03-26 | 2013-04-10 | 엘지전자 주식회사 | 참조신호 수신 방법 및 사용자기기, 참조신호 전송 방법 및 기지국 |
KR101192041B1 (ko) * | 2010-04-06 | 2012-10-17 | 서울대학교산학협력단 | 다중안테나 무선 시스템에서 채널 정보의 차등적 양자화 방법 및 장치 |
CN104935368B (zh) * | 2010-04-12 | 2018-07-24 | Lg电子株式会社 | 在支持多天线的无线通信系统中的有效反馈的方法和设备 |
KR20120029338A (ko) * | 2010-09-16 | 2012-03-26 | 엘지전자 주식회사 | 다중 안테나 지원 무선 통신 시스템에서 효율적인 피드백 방법 및 장치 |
KR101863927B1 (ko) * | 2010-09-26 | 2018-07-05 | 엘지전자 주식회사 | 다중 안테나 지원 무선 통신 시스템에서 효율적인 피드백 방법 및 장치 |
US8687555B2 (en) * | 2010-09-29 | 2014-04-01 | Lg Electronics Inc. | Method and apparatus for performing effective feedback in wireless communication system supporting multiple antennas |
WO2012169817A2 (en) * | 2011-06-10 | 2012-12-13 | Lg Electronics Inc. | Method and apparatus for transmitting channel state information in multi-node system |
JP6851709B2 (ja) * | 2012-01-27 | 2021-03-31 | サムスン エレクトロニクス カンパニー リミテッド | 非周期的チャンネル状態情報に対する多重プロセスの報告 |
CN104106223A (zh) * | 2012-02-11 | 2014-10-15 | Lg电子株式会社 | 报告信道状态信息的方法、其支持方法及所述方法的设备 |
CN104365060B (zh) * | 2012-05-08 | 2018-05-11 | 马维尔国际贸易有限公司 | 用于在协作多点传输中报告反馈的方法和系统 |
CN104584450B (zh) * | 2012-06-04 | 2018-01-26 | 交互数字专利控股公司 | 传递多个传输点的信道状态信息(csi) |
US9667391B2 (en) * | 2012-09-20 | 2017-05-30 | Samsung Electronics Co., Ltd | Channel estimation method and apparatus for cooperative communication in cellular mobile communication system |
KR20140038275A (ko) * | 2012-09-20 | 2014-03-28 | 삼성전자주식회사 | 셀룰러 이동 통신 시스템에서 협력 통신을 위한 채널 추정 방법 및 장치 |
CA2887728C (en) | 2012-09-28 | 2019-07-09 | Huawei Technologies Co., Ltd. | Channel-state information process processing method, network device, and user equipment |
WO2014073522A1 (ja) * | 2012-11-07 | 2014-05-15 | 日本電信電話株式会社 | 送信機及び無線通信方法 |
US9325482B2 (en) * | 2013-09-10 | 2016-04-26 | Lg Electronics Inc. | Method for coordinated scheduling in wireless communication system and apparatus therefor |
US9893777B2 (en) * | 2014-11-17 | 2018-02-13 | Samsung Electronics Co., Ltd. | Method and apparatus for precoding channel state information reference signal |
US9820326B2 (en) * | 2015-04-02 | 2017-11-14 | Qualcomm Incorporated | Techniques for assisting radio access technology (RAT) communications using another RAT |
-
2016
- 2016-10-31 WO PCT/KR2016/012338 patent/WO2017078338A1/ko active Application Filing
- 2016-10-31 EP EP16862354.4A patent/EP3373469A4/en not_active Withdrawn
- 2016-10-31 CN CN201680063902.7A patent/CN108352879B/zh active Active
- 2016-10-31 KR KR1020187009132A patent/KR102105962B1/ko active IP Right Grant
- 2016-10-31 US US15/773,097 patent/US10374664B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130028182A1 (en) * | 2011-02-18 | 2013-01-31 | Qualcomm Incorporated | Implicitly linking aperiodic channel state information (a-csi) reports to csi-reference signal (csi-rs) resources |
KR20150039746A (ko) * | 2012-07-23 | 2015-04-13 | 엘지전자 주식회사 | 무선 통신 시스템에서 csi-rs 측정 및 보고 방법과 이를 지원하는 장치 |
KR20150060916A (ko) * | 2012-10-24 | 2015-06-03 | 지티이 코포레이션 | 채널 상태 정보를 확정하는 방법 및 단말 |
Non-Patent Citations (3)
Title |
---|
LG ELECTRONICS: "Aperiodic CSl Related Enhancement for Rel-13 CA", R1-155378, 3GPP TSG RAN WG1 MEETING #82BIS, 25 September 2015 (2015-09-25), XP051002285 * |
SAMSUNG: "Discussion on Aperiodic CSI-RS Resource Configuration for Class B CSI Reporting", R1-155482, 3GPP TSG RAN WG1 MEETING #82BIS, 25 September 2015 (2015-09-25), XP051002387 * |
See also references of EP3373469A4 * |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110692278A (zh) * | 2017-05-27 | 2020-01-14 | 高通股份有限公司 | 用于联合的上行链路数据和信道状态信息反馈的信令设计 |
CN110692278B (zh) * | 2017-05-27 | 2023-03-31 | 高通股份有限公司 | 用于联合的上行链路数据和信道状态信息反馈的信令设计 |
US11757514B2 (en) | 2017-05-27 | 2023-09-12 | Qualcomm Incorporated | Signaling design for joint uplink data and channel state information feedback |
CN111386661A (zh) * | 2017-09-29 | 2020-07-07 | Lg电子株式会社 | 无线通信系统中非周期性的csi的报告方法及其装置 |
CN111386661B (zh) * | 2017-09-29 | 2023-08-18 | Lg电子株式会社 | 无线通信系统中非周期性的csi的报告方法及其装置 |
CN111903101A (zh) * | 2018-03-29 | 2020-11-06 | 中兴通讯股份有限公司 | 无线通信中的信道状态信息报告 |
US11895660B2 (en) | 2018-03-29 | 2024-02-06 | Zte Corporation | Channel state information reporting in wireless communications |
CN111903101B (zh) * | 2018-03-29 | 2024-03-08 | 中兴通讯股份有限公司 | 无线通信中的信道状态信息报告 |
CN114600387A (zh) * | 2019-08-13 | 2022-06-07 | 三星电子株式会社 | 用于在无线通信系统中报告信道状态信息的方法和装置 |
Also Published As
Publication number | Publication date |
---|---|
EP3373469A1 (en) | 2018-09-12 |
CN108352879A (zh) | 2018-07-31 |
KR20180041238A (ko) | 2018-04-23 |
KR102105962B1 (ko) | 2020-04-29 |
CN108352879B (zh) | 2021-08-13 |
EP3373469A4 (en) | 2019-05-01 |
US20180331742A1 (en) | 2018-11-15 |
US10374664B2 (en) | 2019-08-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2017078338A1 (ko) | 무선 통신 시스템에서 채널 상태 보고 방법 및 이를 위한 장치 | |
WO2017078326A1 (ko) | 무선 통신 시스템에서 상향링크 제어 채널 전송 방법 및 이를 위한 장치 | |
WO2017135745A1 (ko) | 무선 통신 시스템에서 상향링크 제어 정보의 맵핑, 전송, 또는 수신 방법 및 이를 위한 장치 | |
WO2018128340A1 (ko) | 무선 통신 시스템에서 채널 상태 보고를 위한 방법 및 이를 위한 장치 | |
WO2018038418A1 (ko) | 무선 통신 시스템에서 상향링크 전송을 위한 방법 및 이를 위한 장치 | |
WO2018174450A1 (ko) | 무선 통신 시스템에서 복수의 전송 시간 간격, 복수의 서브캐리어 간격, 또는 복수의 프로세싱 시간을 지원하는 단말을 위한 상향링크 신호 전송 또는 수신 방법 및 이를 위한 장치 | |
WO2016105121A1 (ko) | 무선 통신 시스템에서 채널 상태 보고 방법 및 이를 위한 장치 | |
WO2018030714A1 (ko) | 무선 통신 시스템에서 채널 상태 보고를 위한 방법 및 이를 위한 장치 | |
WO2016148450A1 (ko) | 무선 통신 시스템에서 채널 상태 보고 방법 및 이를 위한 장치 | |
WO2017196065A1 (ko) | 무선 통신 시스템에서 상향링크 전송 전력의 제어 방법 및 이를 위한 장치 | |
WO2018164452A1 (ko) | 무선 통신 시스템에서 하향링크 신호를 수신 또는 전송하기 위한 방법 및 이를 위한 장치 | |
WO2018088857A1 (ko) | 무선 통신 시스템에서 상향링크 신호를 전송하기 위한 방법 및 이를 위한 장치 | |
WO2017091033A1 (ko) | 무선 통신 시스템에서 하향링크 제어 채널 수신 방법 및 이를 위한 장치 | |
WO2018199681A1 (ko) | 무선 통신 시스템에서 채널 및 간섭 측정을 위한 방법 및 이를 위한 장치 | |
WO2016163807A1 (ko) | 무선 통신 시스템에서 간섭 하향링크 제어 정보를 수신하기 위한 방법 및 이를 위한 장치 | |
WO2019156466A1 (ko) | 무선 통신 시스템에서 신호를 송신 또는 수신하는 방법 및 이를 위한 장치 | |
WO2013141595A1 (ko) | 상향링크 신호 전송 또는 수신 방법 | |
WO2018203732A1 (ko) | 무선 통신 시스템에서 상향링크 신호를 전송하기 위한 방법 및 이를 위한 장치 | |
WO2018021815A1 (ko) | 무선 통신 시스템에서 채널 상태 보고를 위한 방법 및 이를 위한 장치 | |
WO2018203624A1 (ko) | 무선 통신 시스템에서 참조 신호를 수신하기 위한 방법 및 이를 위한 장치 | |
WO2017043834A1 (ko) | 채널 상태 보고 방법 및 이를 위한 장치 | |
WO2013043026A2 (ko) | 상향링크 신호 전송방법 및 사용자기기와, 상향링크 신호 수신방법 및 기지국 | |
WO2018236117A1 (ko) | 무선 통신 시스템에서 harq-ack/nack 피드백을 위한 방법 및 이를 위한 장치 | |
WO2016182369A1 (ko) | 무선 통신 시스템에서 채널 센싱을 위한 방법 및 이를 위한 장치 | |
WO2017026777A1 (ko) | 무선 통신 시스템에서 하향링크 채널 수신 또는 상향링크 채널 전송 방법 및 이를 위한 장치 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16862354 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20187009132 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15773097 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2016862354 Country of ref document: EP |