WO2018127193A1 - 信道状态信息反馈方法、用户设备及基站 - Google Patents

信道状态信息反馈方法、用户设备及基站 Download PDF

Info

Publication number
WO2018127193A1
WO2018127193A1 PCT/CN2018/071834 CN2018071834W WO2018127193A1 WO 2018127193 A1 WO2018127193 A1 WO 2018127193A1 CN 2018071834 W CN2018071834 W CN 2018071834W WO 2018127193 A1 WO2018127193 A1 WO 2018127193A1
Authority
WO
WIPO (PCT)
Prior art keywords
reference signal
csi
signal resources
indication information
feedback
Prior art date
Application number
PCT/CN2018/071834
Other languages
English (en)
French (fr)
Inventor
刘鹍鹏
李雪茹
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to JP2019537182A priority Critical patent/JP2020506586A/ja
Priority to EP18736242.1A priority patent/EP3565140B1/en
Publication of WO2018127193A1 publication Critical patent/WO2018127193A1/zh
Priority to US16/505,204 priority patent/US10673508B2/en

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
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • 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
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals

Definitions

  • the present application relates to communications technologies, and in particular, to a channel state information feedback method, a user equipment, and a base station.
  • the conventional antenna array has a fixed downtilt angle in the vertical direction, that is, provides a fixed beam in the vertical direction for each user equipment in the cell.
  • a three-dimensional (3 Dimension, 3D) Beaming Forming (BF) technology is introduced.
  • the 3D beamforming technology is based on the Active Antenna System (AAS), which can generate beams with different downtilt angles for each user equipment in the vertical direction according to the position of the user equipment, so that the beam is carried in both the horizontal direction and the vertical direction. Forming.
  • AAS Active Antenna System
  • the channel state information includes a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), and a Rank Indication (RI).
  • CQI Channel Quality Indicator
  • PMI Precoding Matrix Indicator
  • RI Rank Indication
  • channel state information is derived by the user equipment through channel estimation.
  • the user equipment measures a Reference Signal (RS), also called a pilot signal, such as a Channel State Information-Reference Signals (CSI-RS), to estimate a horizontal dimension.
  • RS Reference Signal
  • CSI-RS Channel State Information-Reference Signals
  • the channel state information is reported to the base station.
  • the user equipment needs to perform channel estimation on the vertical dimension channel in addition to channel estimation on the horizontal dimension channel.
  • the traditional channel estimation method that only supports horizontal dimension channel estimation cannot be applied to the 3D beamforming technique.
  • the present application provides a channel state information feedback method, a user equipment, and a base station, which solves the drawbacks of only feeding back horizontal dimension channel state information in the conventional channel estimation.
  • the present application provides a channel state information feedback method, which is described from the perspective of a user equipment.
  • a base station configures N first reference signal resources for a UE and sends the signal to a UE, where the UE receives the After determining the CSI and the M first reference signal indication information of the first reference signal resources according to the feedback mode, the CSI and the M first reference signal resource indication information are fed back to the base station.
  • the UE sends the CSI of the horizontal reference dimension of the M first reference signal resources and the M first reference signal resource indication information to the base station, so that the base station determines the channel of the vertical dimension according to the first reference signal resource indication information.
  • the state information finally obtains channel state information of two dimensions, and solves the drawback of only channel state information of the horizontal dimension in the traditional channel estimation.
  • the feedback mode includes a first feedback mode
  • Determining, by the UE, the channel state indication CSI and the M first reference signal resource indication information according to the feedback mode including:
  • the UE determines at least one element in the CSI according to the N first reference signal resources, and determines the M first reference signals based on at least one element in the CSI. Resource indication information.
  • At least one element in the CSI is an RI that is recently reported by the UE before determining the M first reference signal resource indication information, in the first feedback mode, where Determining, by the UE, the at least one element in the CSI according to the N first reference signal resources, and determining the M first reference signal resource indication information based on the at least one element in the CSI, including:
  • the UE determines the last reported RI according to the N first reference signal resources, and determines the M first reference signal resource indications based on the last reported RI. information.
  • the N first reference signal resources of the UE determine the RI that was last reported, and determine the M based on the last reported RI.
  • the method further includes:
  • the UE Determining, by the UE, the M second reference signal resources according to the association relationship, where the association relationship is an association relationship between the M first reference signal resources and the M second reference signal resources;
  • the UE reports at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector to the base station.
  • the feedback period of the RI is a first feedback period
  • the feedback period of the M first reference signal resource indication information is a second feedback period
  • the feedback period of the PMI and the CQI is a three feedback period
  • the first feedback period is k1 times the second feedback period
  • the second feedback period is k2 times the third feedback period
  • k2 ⁇ 1 and is Integer is an integer
  • the UE determines the last reported RI according to the N first reference signal resources, and determines the RI based on the last reported RI.
  • M first reference signal resource indication information including:
  • the UE determines the most recently reported RI according to the N first reference signal resources, and determines the M first according to the last reported RI query correspondence table.
  • a reference signal resource indication information, the correspondence relationship table stores a correspondence between RI and M.
  • the feedback mode includes a second feedback mode
  • the M first reference signal resource indication information is M first reference signal resource indication information that is recently reported by the UE before determining the CSI.
  • the UE determines the M first reference signal resource indication information according to the N first reference signal resources, and based on the M first Determining the CSI by using the M first reference signal resources indicated by the reference signal resource indication information, including:
  • the UE determines the M first reference signal resource indication information according to the N first reference signal resources, and is based on the M indicated by the M first reference signal resource indication information.
  • the first reference signal resources determine the RI in the CSI.
  • the UE determines the M first reference signal resource indication information according to the N first reference signal resources, and based on the M first After the M first reference signal resources indicated by the reference signal resource indication information determine the RI in the CSI, the method further includes:
  • the UE Determining, by the UE, the M second reference signal resources according to the association relationship, where the association relationship is an association relationship between the M first reference signal resources and the M second reference signal resources;
  • the UE reports at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector to the base station.
  • the feedback period of the M first reference signal resource indication information is a fourth feedback period
  • the feedback period of the RI in the CSI is a fifth feedback period
  • the PMI in the CSI is The feedback period of the CQI is a sixth feedback period
  • the fourth feedback period is k3 times of the fifth feedback period
  • the fifth feedback period is k4 times of the sixth feedback period
  • k3 ⁇ 1 is an integer , k4 ⁇ 1 and is an integer.
  • the UE reporting the at least one of the PMI or the CQI to the base station including:
  • the UE determines, according to the last reported RI and the M second reference signal resources, a set of CSI, where each set of CSI includes a PMI, a CQI, a channel covariance matrix, or a channel feature vector. At least one of them;
  • the UE synthesizes the M sets of CSI into a destination CSI, where the destination CSI includes at least one of a destination PMI, a destination CQI, a destination channel covariance matrix, or a destination channel feature vector;
  • the UE reports a base vector, a port index, or a synthesis coefficient of the destination PMI to the base station, so that the base station determines the target PMI according to a base vector, a port index, or a synthesis coefficient of the destination PMI, and according to the The destination PMI obtains the target CQI.
  • the above method further includes:
  • the UE receives the feedback mode configured by the base station by using high layer signaling or dynamic signaling.
  • the above method further includes:
  • the UE feeds back the feedback mode to the base station.
  • the application provides a channel state information feedback method, including:
  • the base station configures N first reference signal resources, each of the first reference signal resources of the N first reference signal resources includes at least one port, N ⁇ 2, and is an integer;
  • the base station receives the channel state indication CSI and the M first reference signal resource indication information reported by the UE according to the feedback mode, where the feedback mode indicates each element in the CSI and the M first reference signal resource indications a determination order of information, the CSI including at least one of the following elements: a rank indication RI, a precoding matrix indication PMI, a channel quality indication CQI, a channel covariance matrix, or a channel feature vector;
  • the M first reference signal resource indication information indicates index and/or quality information of each of the first reference signal resources, and the M first reference signal resources are M first reference signal resources among the N first reference signal resources, M ⁇ N, and being an integer.
  • the feedback mode includes a first feedback mode
  • the base station receives the channel state indication CSI and the M first reference signal resource indication information that are reported by the UE according to the feedback mode, including:
  • the base station receives the M first reference signal resource indication information that is determined by the UE based on at least one element in the CSI, and at least one element in the CSI is the UE. Determined according to the N first reference signal resources.
  • At least one element in the CSI is an RI that is recently reported by the UE before determining the M first reference signal resource indication information, in the first feedback mode, where The receiving, by the base station, the M first reference signal resource indication information that is determined by the UE, based on the at least one element of the CSI, includes:
  • the base station receives the M first reference signal resource indication information that is determined by the UE according to the last reported RI, and the last reported RI is the UE according to the UE.
  • the N first reference signal resources are determined.
  • the method further includes:
  • the base station Receiving, by the base station, at least one of a PMI, a CQI, a channel covariance matrix, or a channel feature vector reported by the UE, where at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector is the UE according to the Determining the last reported RI and the M second reference signal resources, the M second reference signal resources are determined according to the association relationship, and the association relationship is the M first reference signals An association relationship between the resource and the M second reference signal resources.
  • the feedback period of the RI is a first feedback period
  • the feedback period of the M first reference signal resource indication information is a second feedback period
  • the feedback period of the PMI and the CQI is a three feedback period
  • the first feedback period is k1 times the second feedback period
  • the second feedback period is k2 times the third feedback period
  • k2 ⁇ 1 and is Integer is an integer
  • the M first reference signal resource indication information is that the UE determines the last reported RI according to the N first reference signal resources, and according to the latest report
  • the RI query correspondence relationship table is determined, and the correspondence relationship table stores a correspondence relationship between RI and M.
  • the feedback mode includes a second feedback mode
  • Receiving, by the base station, the CSI and the M first reference signal resource indication information that are reported by the UE according to the feedback mode including:
  • the base station receives the CSI determined by the UE based on the M first reference signal resource indication information, where the M first reference signal resource indication information is The N first reference signal resources are determined.
  • the M first reference signal resource indication information is M first reference signal resource indication information that is recently reported by the UE before determining the CSI.
  • the receiving, by the base station, the CSI that is determined by the UE according to the M first reference signal resource indication information includes:
  • the base station receives an RI determined by the UE according to the M first reference signal resources.
  • the base station after receiving the RI determined by the UE according to the M first reference signal resources, the base station further includes:
  • the second reference signal resources are determined by the UE according to the association relationship, where the association relationship is the M first reference signal resources and the M second The relationship between reference signal resources.
  • the feedback period of the M first reference signal resource indication information is a fourth feedback period
  • the feedback period of the RI in the CSI is a fifth feedback period
  • the PMI in the CSI is The feedback period of the CQI is a sixth feedback period
  • the fourth feedback period is k3 times of the fifth feedback period
  • the fifth feedback period is k4 times of the sixth feedback period
  • k3 ⁇ 1 is an integer , k4 ⁇ 1 and is an integer.
  • the base station receives at least one of a PMI, a CQI, a channel covariance matrix, or a channel feature vector reported by the UE, including:
  • the base station receives the destination destination CSI reported by the UE, where the destination CSI includes at least one of a destination PMI, a destination CQI, a destination channel covariance matrix, or a destination channel feature vector; the destination CSI is the UE pair M set.
  • the M sets of CSIs are obtained by the CSI according to the last reported RI and the M second reference signal resources.
  • the above method further includes:
  • the base station sends high-level signaling or dynamic information to the UE, and the high-level signaling or dynamic signaling carries the feedback mode.
  • the above method further includes:
  • the receiving the feedback mode fed back by the UE The receiving the feedback mode fed back by the UE.
  • the application provides a user equipment, including:
  • a receiving module configured to receive N first reference signal resources configured by the base station, where each of the first reference signal resources of the N first reference signal resources includes at least one port, N ⁇ 2, and is an integer;
  • the CSI includes at least one of the following elements: a rank indication RI, a precoding matrix indication PMI, a channel quality indication CQI, a channel covariance matrix, or a channel feature vector;
  • a sending module configured to report the CSI and M first reference signal resource indication information to the base station
  • the M first reference signal resource indication information indicates index and/or quality information of each of the first reference signal resources, and the M first reference signal resources are M first reference signal resources among the N first reference signal resources, M ⁇ N, and being an integer.
  • the feedback mode includes a first feedback mode
  • the processing module is configured to determine, according to the N first reference signal resources, at least one element in the CSI, and determine, according to the at least one element in the CSI, in the first feedback mode. M first reference signal resource indication information.
  • At least one element in the CSI is an RI that is recently reported by the UE before determining the M first reference signal resource indication information
  • the processing module is specifically configured to be used in And determining, according to the N first reference signal resources, the most recently reported RI, and determining, according to the last reported RI, the M first reference signal resource indication information.
  • the processing module is further configured to determine M second reference signal resources according to the association relationship, where the association relationship is the M first reference signal resources and the M second Determining an association relationship between the signal resources; determining, according to the last reported RI and the M second reference signal resources, at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector;
  • the sending module is further configured to report at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector to the base station.
  • the feedback period of the RI is a first feedback period
  • the feedback period of the M first reference signal resource indication information is a second feedback period
  • the feedback period of the PMI and the CQI is a three feedback period
  • the first feedback period is k1 times the second feedback period
  • the second feedback period is k2 times the third feedback period
  • k2 ⁇ 1 and is Integer is an integer
  • the processing module determines the last reported RI according to the N first reference signal resources, and determines the M first references based on the last reported RI
  • the signal resource indication information is specifically used to determine, according to the N first reference signal resources, the most recently reported RI according to the first feedback mode, and according to the last reported RI query correspondence table. Determining the M first reference signal resource indication information, where the correspondence relationship table stores a correspondence between RI and M.
  • the feedback mode includes a second feedback mode
  • the processing module is configured to: in the second feedback mode, the UE determines the M according to the N first reference signal resources.
  • the first reference signal resource indication information and determining the CSI based on the M first reference signal resources indicated by the M first reference signal resource indication information.
  • the M first reference signal resource indication information is M first reference signal resource indication information that is recently reported by the UE before determining the CSI.
  • the processing module is configured to determine, according to the N first reference signal resources, the M first reference signal resource indication information, based on the second feedback mode, and The M first reference signal resources indicated by the M first reference signal resource indication information determine an RI in the CSI.
  • the processing module determines, according to the N first reference signal resources, the M first reference signal resource indication information in the second feedback mode, and based on the M
  • the M first reference signal resources indicated by the first reference signal resource indication information are used to determine the RIs in the CSI, and are further used to determine M second reference signal resources according to the association relationship, where the association relationship is the M Correlation relationship between the first reference signal resource and the M second reference signal resources; determining PMI, CQI, and channel covariance in the CSI according to the M second reference signal resources and the RI At least one of a matrix or a channel feature vector;
  • the sending module is further configured to report at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector to the base station.
  • the feedback period of the M first reference signal resource indication information is a fourth feedback period
  • the feedback period of the RI in the CSI is a fifth feedback period
  • the PMI in the CSI is The feedback period of the CQI is a sixth feedback period
  • the fourth feedback period is k3 times of the fifth feedback period
  • the fifth feedback period is k4 times of the sixth feedback period
  • k3 ⁇ 1 is an integer , k4 ⁇ 1 and is an integer.
  • the processing module is further configured to determine, according to the last reported RI and the M second reference signal resources, a set of CSIs, each set of CSIs in the set of CSIs Include at least one of a PMI, a CQI, a channel covariance matrix, or a channel eigenvector; synthesizing the M sets of CSIs into a destination CSI, where the destination CSI includes a destination PMI, a destination CQI, a destination channel covariance matrix, or a destination channel eigenvector At least one;
  • the sending module is configured to report, to the base station, a base vector, a port index, or a synthesis coefficient of the destination PMI, so that the base station determines, according to a base vector, a port index, or a synthesis coefficient of the destination PMI,
  • the target PMI, and the target CQI is obtained according to the target PMI.
  • the receiving module is further configured to receive the feedback mode configured by the base station by using high layer signaling or dynamic signaling.
  • the sending module is further configured to feed back the feedback mode to the base station.
  • the application provides a base station, including:
  • a processing module configured to configure N first reference signal resources, where each of the first reference signal resources of the N first reference signal resources includes at least one port, N ⁇ 2, and is an integer;
  • a sending module configured to send the N first reference signal resources to the user equipment UE
  • a receiving module configured to receive a channel state indication CSI and M first reference signal resource indication information reported by the UE according to the feedback mode, where the feedback mode indicates each element in the CSI, and the M first reference signals a sequence of determining the resource indication information, the CSI including at least one of the following elements: a rank indication RI, a precoding matrix indication PMI, a channel quality indication CQI, a channel covariance matrix, or a channel feature vector;
  • the M first reference signal resource indication information indicates index and/or quality information of each of the first reference signal resources, and the M first reference signal resources are M first reference signal resources among the N first reference signal resources, M ⁇ N, and being an integer.
  • the feedback mode includes a first feedback mode
  • the receiving module is configured to receive, in the first feedback mode, the M first reference signal resource indication information that is determined by the UE based on at least one element in the CSI, where at least the CSI is An element is determined by the UE according to the N first reference signal resources.
  • At least one element in the CSI is an RI that is recently reported by the UE before determining the M first reference signal resource indication information
  • the receiving module is specifically configured to be used in Receiving, by the first feedback mode, the M first reference signal resource indication information that is determined by the UE according to the last reported RI, where the last reported RI is the UE according to the N
  • the first reference signal resources are determined.
  • the receiving module after receiving the M first reference signal resource indication information that is determined by the UE according to the last reported RI, in the first feedback mode, And being used to receive at least one of a PMI, a CQI, a channel covariance matrix, or a channel feature vector reported by the UE, where at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector is the UE according to the Determining the last reported RI and the M second reference signal resources, the M second reference signal resources are determined according to the association relationship, and the association relationship is the M first reference signals An association relationship between the resource and the M second reference signal resources.
  • the feedback period of the RI is a first feedback period
  • the feedback period of the M first reference signal resource indication information is a second feedback period
  • the feedback period of the PMI and the CQI is a three feedback period
  • the first feedback period is k1 times the second feedback period
  • the second feedback period is k2 times the third feedback period
  • k2 ⁇ 1 and is Integer is an integer
  • the M first reference signal resource indication information is that the UE determines the last reported RI according to the N first reference signal resources, and according to the latest report
  • the RI query correspondence relationship table is determined, and the correspondence relationship table stores a correspondence relationship between RI and M.
  • the feedback mode includes a second feedback mode
  • the receiving module is configured to receive, in the second feedback mode, the CSI determined by the UE according to the M first reference signal resource indication information, and the M first reference signal resource indication information And determining, by the UE, according to the N first reference signal resources.
  • the M first reference signal resource indication information is M first reference signal resource indication information that is recently reported by the UE before determining the CSI.
  • the receiving module is configured to receive, according to the second feedback mode, an RI determined by the UE according to the M first reference signal resources.
  • the receiving module after receiving the RI determined by the UE according to the M first reference signal resources, is further configured to receive the PMI, CQI, and channel covariance reported by the UE.
  • At least one of a matrix or a channel feature vector, at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector is determined by the UE according to the M second reference signal resources, the M second The reference signal resource is determined by the UE according to the association relationship, where the association relationship is an association relationship between the M first reference signal resources and the M second reference signal resources.
  • the feedback period of the M first reference signal resource indication information is a fourth feedback period
  • the feedback period of the RI in the CSI is a fifth feedback period
  • the PMI in the CSI is The feedback period of the CQI is a sixth feedback period
  • the fourth feedback period is k3 times of the fifth feedback period
  • the fifth feedback period is k4 times of the sixth feedback period
  • k3 ⁇ 1 is an integer , k4 ⁇ 1 and is an integer.
  • the receiving module is specifically configured to receive a destination CSI reported by the UE, where the destination CSI includes at least one of a destination PMI, a destination CQI, a destination channel covariance matrix, or a destination channel feature vector.
  • the destination CSI is obtained by synthesizing the set of CSIs by the UE, and the M sets of CSIs are determined by the UE according to the last reported RI and the M second reference signal resources.
  • the sending module is further configured to send high-level signaling or dynamic information to the UE, where the high-level signaling or dynamic signaling carries the feedback mode.
  • the receiving module is further configured to receive the feedback mode fed back by the UE.
  • the application provides a user equipment, including a processor, a memory, a communication interface, and a system bus, where the memory and the communication interface are connected to the processor through the system bus, and complete communication with each other.
  • the memory is for storing computer execution instructions for communicating with other devices, the processor for running the computer to execute instructions to cause the user equipment to perform various steps of a method as applied to a user equipment as above .
  • the application provides a base station, including a processor, a memory, a communication interface, and a system bus, where the memory and the communication interface are connected to the processor through the system bus, and complete communication with each other.
  • the memory is for storing computer execution instructions for communicating with other devices for operating the computer to execute instructions for causing the base station to perform various steps of the method as applied to the base station as above.
  • the present application provides a computer storage medium for storing computer software instructions for use by the user equipment, including a program designed to perform the above-described first aspect or each of the possible implementations of the first aspect.
  • the present application provides a computer storage medium for storing computer software instructions for use by the base station, comprising a program designed to perform the various implementations of the second or second aspect described above.
  • the present application provides a chip system including: at least one processor, a memory, an input/output portion, and a bus; and the at least one processor acquires an instruction in the memory through the bus for implementation
  • the above method relates to the design function of the user equipment.
  • the present application provides a chip system including: at least one processor, a memory, an input/output portion, and a bus; and the at least one processor acquires an instruction in the memory through the bus for implementation
  • the above method involves the design function of the base station.
  • the present application provides a user equipment, including: a memory and a processor, where the memory is used to store program instructions, and the processor is configured to invoke program instructions in the memory to implement the functions of the user equipment in the foregoing method embodiments.
  • the present application provides a base station including: a memory and a processor, where the memory is used to store program instructions, and the processor is configured to invoke program instructions in the memory to implement the functions of the base station in the foregoing method embodiments.
  • the channel state information feedback method, the user equipment, and the base station provided by the application the base station configures N first reference signal resources for the UE, and sends the first reference signal resources to the UE, and after receiving the first reference signal resources, the UE determines the After the CSI of the first reference signal resource and the M first reference signal indication information, the CSI and the M first reference signal resource indication information are fed back to the base station. In the process, the UE feeds back the CSI of the horizontal direction of the M first reference signal resources and the M first reference signal resource indication information to the base station, so that the base station determines the channel of the vertical dimension according to the first reference signal resource indication information.
  • the state information finally obtains channel state information of two dimensions, and solves the drawback of only channel state information of the horizontal dimension in the traditional channel estimation.
  • FIG. 1 is a schematic diagram of a system architecture applicable to a channel state information feedback method according to the present application
  • Embodiment 2 is a schematic diagram of Embodiment 2 of a channel state information feedback method according to the present application.
  • FIG. 3B is another schematic diagram of Embodiment 2 of a channel state information feedback method according to the present application.
  • 4A is a schematic diagram of a method for transmitting a reference signal resource in a channel state information feedback method according to the present application
  • 4B is another schematic diagram of a method for transmitting a reference signal resource in a channel state information feedback method according to the present application
  • 5A is a schematic diagram of a relationship between a first reference signal resource and a second reference signal resource in a channel state information feedback method according to the present application;
  • FIG. 5B is a schematic diagram of another relationship between a first reference signal resource and a second reference signal resource in the channel state information feedback method of the present application.
  • Embodiment 1 of a user equipment is a schematic structural diagram of Embodiment 1 of a user equipment according to the present application.
  • Embodiment 7 is a schematic structural diagram of Embodiment 1 of a base station according to the present application.
  • Embodiment 8 is a schematic structural diagram of Embodiment 2 of a user equipment according to the present application.
  • FIG. 9 is a schematic structural diagram of Embodiment 2 of a base station according to the present application.
  • FIG. 1 is a schematic diagram of a system architecture applicable to a channel state information feedback method according to the present application.
  • the base station may be a Global System for Mobile Communications (GSM) or a Base Transceiver Station (BTS) in Wideband Code Division Multiple Access (WCDMA), or may be in WCDMA.
  • the base station (NodeB) may also be an evolved base station (eNB) in Long Term Evolution (LTE) or a base station in the 5th Generation Mobile Communication (5G). Etc., this application is not limited.
  • the user equipment may be a wired terminal or a wireless terminal
  • the wireless terminal may be a device that provides voice and/or data connectivity to the user, a handheld device with wireless connectivity, or other processing device connected to the wireless modem.
  • the wireless terminal can communicate with one or more core networks via a wireless access network, which can be a mobile terminal, such as a mobile telephone (or "cellular" telephone) and a computer with a mobile terminal, for example, can be portable, Pocket, handheld, computer built-in or in-vehicle mobile devices that exchange language and/or data with a wireless access network.
  • a personal communication service (PCS) telephone a cordless telephone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and the like.
  • PCS personal communication service
  • WLL wireless local loop
  • PDA personal digital assistant
  • the wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, and a remote terminal. Access Terminal, User Terminal, User Agent, User Device, User Equipment, etc.
  • FIG. 2 is a signaling diagram of a redundancy version generation method provided by the present application.
  • the example includes:
  • the user equipment UE receives the N first reference signal resources configured by the base station, and each of the first reference signal resources of the N first reference signal resources includes at least one port, N ⁇ 2, and is an integer.
  • the base station configures N first reference signal resources, such as N Channel State Information-Reference Signals (CSI-RS) resources, for the UE.
  • N first reference signal resources such as N Channel State Information-Reference Signals (CSI-RS) resources
  • the base station sends the N first reference signal resources to a user equipment UE.
  • the base station After the N reference signal resources are configured, the base station sends the N reference signal resources to the UE; correspondingly, the UE receives the N reference signal resources configured by the base station.
  • the UE determines a channel state indication CSI and M first reference signal resource indication information according to a feedback mode.
  • the UE After receiving the N first reference signal resources, the UE determines channel state information (CSI) and M first reference signal resource indication information of the N first reference signal resources according to the feedback mode, where the M The first reference signal resource indication information indicates index and/or quality information of each of the first reference signal resources, and the M first reference signal resources are the N first reference signals.
  • the N first reference signals are specifically 10 first reference signal resources, and the index is 1 to 10, and the M first reference signal resources are the first first reference signals of the 10 first reference signal resources.
  • the resource and the third first reference signal resource, the quality of the first first reference signal resource is 10 decibels (dB), and the quality of the third first reference signal resource is 8 db, then the M first reference signal resource indications
  • the information includes a first reference signal resource indication information and a third reference signal resource indication information, where the first reference signal resource indication information is used to indicate that the index is 1, the first reference signal resource with the quality of 10 db, and the third reference signal resource indication information.
  • the first reference signal resource is used to indicate that the index is 3 and the quality is 8 db.
  • the CSI includes at least one of the following elements: a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a Rank Indication (RI), a Channel Covariance Matrix, and a Channel Feature Vector.
  • the feedback mode indicates a determining order of each element in the CSI and the M first reference signal resource indication information. In a specific implementation manner, in different feedback modes, the determining order of each element in the CSI and the M first reference signal resource indication information is different.
  • the UE when the base station side angle of the channel is large, the UE first determines the RI in the CSI according to the N measurement reference signal resources, and then determines the M first reference signal resource indication information based on the RI, and then based on the RI and the M first references.
  • the signal resource indication information determines at least one of a PMI, a CQI, a channel covariance matrix, and a channel feature vector; for example, when the base station side angle of the channel is small, the UE first determines M first references according to the N first reference signal resources.
  • the signal resource indication information determines, according to the M first reference signal resources indicated by the M first reference signal resource indication information, the RI in the CSI, and then the M first references indicated by the M first reference signal resource indication information
  • the signal resource and the determined RI determine at least one of a PMI, a CQI, a channel covariance matrix, and a channel feature vector; for example, the UE first determines all elements in the CSI, and then determines M first reference signals based on all elements.
  • the resource indication information for example, the UE first determines the M first reference signal resource indication information, and then, based on the M first reference signal resource indication information, the M first parameters Test the signal resources to determine all the elements in the CSI.
  • the UE reports the CSI and M first reference signal resource indication information to the base station.
  • the UE After determining the CSI and M reference signal resource indication information, the UE feeds back the CSI and M reference signal resources to the base station.
  • the base station configures N first reference signal resources for the UE and sends the first reference signal resources to the UE, and after receiving the first reference signal resources, the UE determines the first reference signal resources according to the feedback mode.
  • the CSI and the M first reference signal indication information are fed back to the base station.
  • the UE feeds back the CSI of the horizontal direction of the M first reference signal resources and the M first reference signal resource indication information to the base station, so that the base station determines the channel of the vertical dimension according to the first reference signal resource indication information.
  • the state information finally obtains channel state information of two dimensions, and solves the drawback of only channel state information of the horizontal dimension in the traditional channel estimation.
  • the feedback mode includes a first feedback mode or a second feedback mode.
  • the UE determines M first reference signal resource indication information based on at least one element in the CSI.
  • the second feedback mode The UE determines the CSI based on the M first reference signal resource indication information.
  • the UE determines at least one element in the CSI according to the N first reference signal resources, and determines, according to at least one element in the CSI, M first reference signal resource indication information, where the at least one An element is, for example, an RI, a PMI, a CQI or a channel covariance matrix, and a channel feature vector.
  • the first feedback mode is described in detail below by using the at least one element as an example of the RI that is reported by the UE before the M first reference signal resource indication information. For details, refer to FIG. 3A.
  • FIG. 3A is a schematic diagram of Embodiment 2 of a channel state information feedback method according to the present application.
  • the AAS antenna array is, for example, a 2 ⁇ 2 antenna array (as shown in the figure).
  • beamforming can be performed in both horizontal and vertical dimensions.
  • the AAS antenna array can form different beams in the vertical dimension.
  • the index of the N first reference signal resources configured by the base station is 1 to 5 in sequence, and the 5 first reference signal resources are 1 to 5 filled with oblique lines, squares, horizontal lines, vertical lines, and points in sequence. Show.
  • Each reference signal resource corresponds to one resource port, and different first reference signal resources correspond to different directed beams, and different beams have different beam identifiers (Beam IDs).
  • the index indicated by each first reference signal resource indication information corresponds to a unique Beam ID.
  • the UE determines the most recently reported RI according to the N first reference signal resources, and determines the M first references according to the last reported RI query correspondence table.
  • Signal resource indication information where the correspondence relationship table stores a correspondence between RI and M. For example, if RI is 1 to 2, then M is 2, RI is 3 to 4, and M is 4.
  • the M first reference signal resource indication information is the M beam identifiers (Beam IDs) corresponding to the M indexes, and the CSI that was last reported by the UE before determining the M first reference signal resource indication information.
  • the UE determines the "2Beam ID” according to the "1RI”
  • the "2Beam ID” is the beam identifier of the beam corresponding to the index 1 and the index 3 respectively. If the UE determines the "2Beam ID", the last reported CSI has not changed for the RI.
  • the "5Beam ID” is determined, the “5Beam ID” is still determined according to the "1RI”.
  • the UE determines the M reference signal resource indication information based on the PMI and/or the CQI in the CSI the UE determines the “5Beam ID” based on “4PMI/CQI”.
  • the N first reference signal resources of the UE determine the RI that was last reported, and determine the first M reference signal resource indications based on the last reported RI
  • the M second reference signal resources may be determined according to the association relationship, and the PMI, the CQI, the channel covariance matrix or the channel are determined according to the last reported RI and the M second reference signal resources.
  • At least one of the feature vectors then the UE reports at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector to the base station.
  • the association relationship is an association relationship between the M first reference signal resources and the M second reference signal resources.
  • the UE determines M second reference signal resources according to “2Beam ID” and the association relationship, and the M The second reference signal resource map is not shown, and at least one of the PMI, CQI, channel covariance matrix or channel feature vector is determined according to the M second reference signal resources, and then reported to the base station.
  • each of the first reference signal resources of the N first reference signal resources includes two ports, and the corresponding ones of the first reference signal resources are the same, and the N first reference signal resources are respectively corresponding to the beams B1 to B10.
  • the indexes (Index) corresponding to the N first reference signal resources are respectively Index1 to Index10, and the M first reference signal resources are the first reference signal resources indexed as Index1 and Index3.
  • the association relationship indicates that the first reference signal resource and the second reference signal resource respectively belong to different reference signal resource sets, and the first reference signal resource has a corresponding relationship with the index of the second reference signal resource, for example, an index of the first reference signal resource
  • the index of the second reference signal resource is the same, or the index of the second reference signal resource is obtained by shifting the index of the first reference signal resource by one value.
  • the index of the first reference signal resource is the same as the index of the second reference signal resource, and it is assumed that there are 10 second reference signal resources, respectively corresponding to the beams B1 B B10, and the indexes are index1' to Index 10', and each second The reference signal resource has 8 ports. Then, the RI that is reported by the UE last time determines that the M first reference signal resources are the first reference signal resources indexed as Index1 and Index3, and then determines that the M second reference signal resources are respectively indexed according to the association relationship. And the second reference signal resource of Index3', based on the second reference signal resource indexed as Index1' and Index3', determining at least one of a PMI, a CQI, a channel covariance matrix, or a channel feature vector.
  • the feedback period of the RI is the first feedback period
  • the feedback period of the first reference signal resource indication information ie, the Beam ID
  • the feedback period of the PMI/CQI is the third feedback period.
  • the first feedback period is k1 times the second feedback period
  • the second feedback period is k2 times the third feedback period, k1 ⁇ 1 and is an integer
  • the UE determines the M first reference signal resource indication information according to the N first reference signal resources, and determines the CSI based on the M first reference signal resource indication information, where the CSI is, for example, RI, PMI, CQI or channel covariance matrix, channel feature vector, etc.
  • the UE determines the M first reference signal resource indication information according to the N first reference signal resources, and determines the RI based on the M first reference signal resource indication information as an example, and details the second feedback mode.
  • FIG. 3B is another schematic diagram of Embodiment 2 of the channel state information feedback method of the present application.
  • the AAS antenna array is, for example, a 2 ⁇ 2 antenna array (as shown in the figure).
  • beamforming can be performed in both horizontal and vertical dimensions.
  • the AAS antenna array can form different beams in the vertical dimension.
  • the UE first reported three first reference signal resource indication information, and the three first reference signal resource indication information indicates that the index is 1 to 3 reference signal resources, and the three first reference signal resources are obliquely shown in the figure.
  • the squares and horizontal lines are filled with 1-3.
  • Each first reference signal resource corresponds to one resource port, and different first reference signal resources correspond to different directed beams, and different beams have different beam identifiers (Beam IDs). That is to say, the index indicated by each first reference signal resource indication information corresponds to a unique Beam ID.
  • the CSI is specifically the RI.
  • the M first reference signal resource indication information reported by the UE is “1Beam ID”, and the “1Beam ID” is the beam of the beam corresponding to the index 3 port.
  • the UE determines "2RI” according to "1Beam ID”. If the UE does not change the BEA ID reported by the UE after the "2RI” is determined, the UE still determines "5RI” based on the "1Beam ID" when determining "5RI”.
  • the UE determines the M first reference signal resource indication information according to the N first reference signal resources, and is indicated by the M first reference signal resource indication information
  • the M second reference signal resources may be determined according to the association relationship, where the association relationship is the M first reference signal resources and the M Correlation between the second reference signal resources; determining, by the UE, the PMI, the CQI, the channel covariance matrix, or the channel feature vector in the CSI according to the M second reference signal resources and the RI at least one.
  • the M reference signal resource indication information that is, the feedback period of the Beam ID is the fourth feedback period
  • the feedback period of the RI is the fifth feedback period
  • the feedback period of the PMI/CQI is the sixth feedback period.
  • the fourth feedback period is k3 times the fifth feedback period
  • the fifth feedback period is k4 times the sixth feedback period, k3 ⁇ 1 and is an integer
  • FIG. 4A is a schematic diagram of a method for transmitting a reference signal resource in a channel state information feedback method according to the present application
  • FIG. 4B is another method for transmitting a reference signal resource in a channel state information feedback method according to the present application. schematic diagram.
  • FIG. 4A Please refer to FIG. 4A.
  • the UE measures N reference signal resources sent by the base station and sends them by N ports.
  • a reference signal resource is a reference signal transmitted on a port.
  • the N/2 reference signal resources are sent by the N/2 antenna port in the first polarization direction, and the N/2 reference signal resources are sent by the N/2 antenna port in the second polarization direction.
  • the reference signal of each port is precoded by a precoding matrix, and one precoding matrix corresponds to one beam. Therefore, it can be considered that the reference signal of each port is transmitted by a corresponding beam.
  • the direction of the port is sent.
  • the form of the precoding vector can be various, such as a Discrete Fourier Transform (DFT) vector.
  • the base station determines N reference signals (e.g., CSI-RS) s1, ... sm, wherein the N CSI-RSs may be predefined and known to the base station and the terminal device.
  • the UE can select the feedback mode and report the feedback mode to the base station by measuring the reference signal.
  • the base station may notify the UE of the feedback mode that should be used by using high layer signaling (RRC) or dynamic signaling (DCI).
  • RRC high layer signaling
  • DCI dynamic signaling
  • the UE measures the reference signal and determines its own set of channel state information CSI according to the selected feedback mode or the feedback mode configured by the base station.
  • a set of CSI includes a feedback mode including at least one of the following elements: a rank indication RI, a precoding matrix indication PMI, and a channel quality indicator CQI.
  • the PMI can be a wideband PMI or multiple subband PMIs.
  • the feedback mode includes a first feedback mode and a second feedback mode.
  • the UE first determines at least one element in the CSI according to the measurement of the N reference signals, and determines M reference signal resource indication information based on the at least one element in the CSI.
  • M is a positive integer less than N.
  • each reference signal resource indicates an index for indicating a reference signal resource, and indicates quality information of the reference signal resource, such as received power (RSRP), reception quality (RSRQ), and the like.
  • the UE determines M reference signal resource indication information according to the measurement of the N reference signals, and determines each element of the CSI based on the M reference signal resource indication information.
  • the UE may obtain the received power of the reference signals of the N ports according to the reference signals for measuring the N ports.
  • the UE may determine to report the CSI by using the first feedback mode.
  • the UE may determine to report the CSI in the second feedback mode.
  • the UE can also determine the feedback mode in other ways, and does not exclude it here.
  • the UE first determines to report the RI according to the result of measuring the reference signal.
  • the RI indicates the number of data layers transmitted by the base station in the same time-frequency resource during the subsequent data transmission.
  • the UE reports the M reference signal resources based on the RI, and the indication of each reference signal resource is used to indicate the number of the reference signal resource and the quality information of the reference signal resource.
  • the method for reporting the M indications may be a report beam number, or a port number.
  • the time at which the UE reports the M reference signal resources may be different from the time at which the RI is reported.
  • the RI on which the M reference signal resource indications are reported is the RI that was last reported before the current reporting time.
  • the value of the M may be configured by the base station to the UE, or may be recommended by the UE to the base station.
  • the value of M is associated with the RI.
  • the specific association relationship may be predefined. For example, by predefining a table, the base station configures the value of M by querying the table. For example, the value of M does not decrease as the RI increases.
  • the association table of M and RI may be in a form similar to the following table:
  • the base station can configure the corresponding M value of the UE according to the RI reported by the UE.
  • the specific relationship may also be other ways, and is not excluded here.
  • the UE further reports at least one of the PMI and the CQI based on the reported RI and the M reference signal resource indications.
  • the PMI reported here synthesizes a target PMI for the measurement of the M first reference signal resources, and may include one (wideband) PMI or multiple (subband) PMIs.
  • the CQI is calculated based on the RI, M reference signal resource indications, and PMI.
  • the PMI is used to indicate the number of the selected port in the port in each polarization direction.
  • each PMI selects only one port in each polarization direction port; in the second mode, for each of the RI layer data Layer data, each PMI selects at least two ports in each polarization direction port, and the PMI includes the selected port number and a linear combination coefficient between the ports.
  • the reporting of the PMI and the CQI by the UE may be different from the timing of reporting the M reference signal resources. When the time when the PMI and the CQI are reported are later than the time when the M reference signal resource indication is reported, the M reference signal resource indications on which the PMI and the CQI are reported are the M reference signal resource indications that were reported last time before the reporting time.
  • the feedback period of the RI is the first feedback period
  • the feedback period indicated by the M reference signal resources is the second feedback period
  • the feedback period of the PMI and the CQI is the third feedback period
  • the first feedback period is k1 times the second feedback period
  • the second feedback period is k2 times the third feedback period
  • a schematic diagram of the first feedback mode is shown in 3A.
  • the UE first reports an indication of the M reference signal resources according to the result of the measurement reference signal, where the indication of each reference signal resource is used to indicate the number of the reference signal resource and the quality information of the reference signal resource. .
  • the method for reporting the M indications may be a report beam number, or a port number.
  • the UE further determines the RI according to the indication of the reported M reference signal resources.
  • the time at which the UE reports the M reference signal resources may be different from the time at which the RI is reported. When the time when the RI is reported is later than the time when the M reference signal resource indication is reported, the M reference signal resource indications on which the RI is reported are the M reference signal resource indications that were last reported before the reporting time.
  • the UE further reports at least one of the PMI and the CQI based on the reported M reference signal resource indications and the RI.
  • the PMI reported here synthesizes a target PMI for the measurement of the M first reference signal resources, and may include one (wideband) PMI or multiple (subband) PMIs.
  • the CQI is calculated based on the RI, M reference signal resource indications, and PMI.
  • the PMI is used to indicate the number of the selected port in the port in each polarization direction.
  • each PMI selects only one port in each polarization direction port; in the second mode, for each of the RI layer data Layer data, each PMI selects at least two ports in each polarization direction port, and the PMI includes the selected port number and a linear combination coefficient between the ports.
  • the time at which the UE reports the PMI and the CQI may be different from the time at which the RI is reported. When the time at which the PMI and the CQI are reported is later than the time at which the RI is reported, the RI on which the PMI and the CQI are reported is the RI that was last reported before the time of the report.
  • the feedback period indicated by the M reference signal resources is the fourth feedback period
  • the feedback period of the RI is the fifth feedback period
  • the feedback period of the PMI and the CQI is the sixth feedback period.
  • the fourth feedback period is k3 times the fifth feedback period
  • the fifth feedback period is k4 times the sixth feedback period, k3 ⁇ 1 and is an integer
  • the schematic diagram 3B of the first feedback mode is shown.
  • H is the channel coefficient of the antenna corresponding to the port corresponding to the port in the first polarization direction
  • G is the channel coefficient of the corresponding antenna to the UE of the port in the second polarization direction.
  • the reference signal resource indications 1 , 2 , 5, and 6 and the coefficients [v 1 , v 2 , u 1 , . . . , u 2 ] of each sub-band are the PMIs reported by the UE.
  • the channel coefficient X is M sets of CSI measured based on the selected M reference signal resources, and the reported PMI [v 1 , v 2 , u 1 , . . . , u 2 ] is the target PMI obtained based on the M sets of CSIs.
  • the UE measures N first reference signal resources sent by the base station.
  • Each of the first reference signal resources is sent by n ports, and the n ports of the same first reference signal resource use the same precoding matrix to precode the measurement reference signals on the port, that is, the same first reference signal resource.
  • the beam directions of the n ports are the same, and the beam direction is the beam direction of the first reference signal.
  • the UE can select the feedback mode and report the feedback mode to the base station by measuring the reference signal.
  • the base station may notify the UE of the feedback mode that should be used by using high-level signaling (RRC) or Downlink control information (DCI).
  • the UE measures the reference signal and determines its own set of channel state information CSI according to the selected feedback mode or the feedback mode configured by the base station.
  • a set of CSI includes a feedback mode including at least one of the following elements: a rank indication RI, a precoding matrix indication PMI and a channel quality indication CQI, a channel covariance matrix, and a channel eigenvector.
  • the PMI may be a wideband PMI or multiple subband PMIs.
  • the channel covariance matrix may be a wideband channel covariance matrix or multiple subband channel covariance matrices.
  • the channel eigenvector may be a wideband channel characteristic.
  • a vector may also be a plurality of subband channel feature vectors.
  • the feedback mode includes a first feedback mode and a second feedback mode.
  • the UE first determines at least one element in the CSI according to the measurement of the N first reference signal resources, and determines M reference signal resource indication information based on the at least one element in the CSI.
  • M is a positive integer less than N.
  • Each of the M reference signal resource indication information indicates an index indicating a first reference signal resource, and indicates quality information of the first reference signal resource, such as received power (RSRP) and reception quality ( RSRQ) and so on.
  • the UE determines M reference signal resource indication information according to the measurement of the N first reference signal resources, and determines each element of the CSI based on the M reference signal resource indication information.
  • the UE may measure the received power of the N first reference signal resources. When the UE determines that the first reference signal resource whose received power exceeds the predetermined threshold is greater than one, the UE may determine to report the CSI by using the first feedback mode. When the UE determines that the first reference signal resource whose received power exceeds the predetermined threshold is only one, the UE may determine to report the CSI by using the second feedback mode.
  • the UE can also determine the feedback mode in other ways, and does not exclude it here.
  • the UE first determines to report the RI according to the result of measuring the first reference signal.
  • the RI indicates the number of data layers transmitted by the base station in the same time-frequency resource during the subsequent data transmission.
  • the UE reports the M reference signal resources based on the RI, and the indication of each reference signal resource is used to indicate the number of the first reference signal resource and the quality information of the first reference signal resource.
  • the time at which the UE reports the M reference signal resources may be different from the time at which the RI is reported.
  • the RI on which the M reference signal resource indications are reported is the RI that was last reported before the current reporting time.
  • the value of the M may be configured by the base station to the UE, or may be recommended by the UE to the base station.
  • the specific association relationship can be represented by a table, and the base station or the UE can determine M by querying the table.
  • the UE further reports at least one of a PMI, a CQI, a channel covariance matrix, and a channel feature vector based on the reported RI and the M reference signal resource indications.
  • the PMI may be used to indicate a precoding matrix selected by the UE.
  • the precoding matrix indicated by the reported PMI includes an M ⁇ n column, where the precoding matrix is used to perform a total of M ⁇ n ports of the M first reference signal resources indicated by the M reference signal resource indications that are reported.
  • Precoding that is, synthesizing a target PMI for the measurement of the M first reference signal resources.
  • the target PMI may be obtained by synthesizing M CSIs obtained by measuring M reference signal resources.
  • the target PMI may report one for the entire bandwidth or one for each sub-band.
  • the reported channel covariance matrix may include M covariance matrices, wherein each covariance matrix is a covariance matrix of n ports of the reference signal resources of the M reference signal resources to the UE. .
  • the reported channel covariance matrix includes a covariance matrix, which is a covariance matrix of the M ⁇ n ports of the M reference signal resources to the UE, that is, a target for the measurement of the M first reference signal resources. Covariance matrix.
  • the target covariance matrix can report one for the entire bandwidth or one for each subband.
  • the reported channel feature vector may include M channel feature vectors, where each channel feature vector is a channel feature vector of n ports of the reference signal resource of the M reference signal resources to the channel of the UE.
  • the reported channel feature vector includes a channel feature vector, which is a channel feature vector of the M ⁇ n ports of the M reference signal resources to the UE, that is, a target channel is synthesized for the measurement of the M first reference signal resources.
  • Feature vector may report one for the entire bandwidth or one for each sub-band.
  • the CQI is calculated based on the reported M reference signal resource indications, RI and PMI calculations, or based on the reported M reference signal resource indications, RIs, channel covariance matrices, or channel feature vectors.
  • the time at which the UE reports the PMI, the CQI, the channel covariance matrix, and the channel feature vector may be different from the time at which the M reference signal resources are reported.
  • the M reference signal resource indications on which the PMI, the CQI channel covariance matrix, and the channel eigenvector are reported are The M reference signal resource indications reported last time before the reporting time.
  • the one target PMI may also be used to report a set of linear combination coefficients of a total of M ⁇ n ports of the selected M reference signal resources.
  • the UE measures N reference signal resources and selects reference signal resources No. 1 and No. 2.
  • the channel matrix of the downlink channel of the two ports of the No. 1 reference signal resource to the UE is H
  • the channel matrix of the two ports of the No. 2 reference signal resource to the downlink channel of the UE is G.
  • the dimensions of H and M are both M ⁇ 2, where M is the number of antennas of the UE.
  • the UE performs singular value decomposition on the channel matrices of H and G respectively to obtain the main eigenvector v1 of H and the main eigenvector v2 of G, where v1 and v2 are both vectors of dimension 2 ⁇ 1.
  • the reported target PMI includes the following set of combination coefficients (u1, u2, a1, a2, b1, b2).
  • the reported set of combination coefficients (u1, u2, a1, a2, b1, b2) is based on the PMI synthesized by the set of CSI.
  • the combination coefficient can be reported for one set for the entire bandwidth, or one set can be reported for each sub-band.
  • the combination coefficient can also be solved by other means and will not be excluded here.
  • the feedback period of the RI is the first feedback period
  • the feedback period indicated by the M reference signal resources is the second feedback period
  • the feedback periods of the PMI, the CQI, the channel covariance matrix, and the channel feature vector are
  • the first feedback period is k1 times the second feedback period
  • the second feedback period is k2 times the third feedback period, k1 ⁇ 1 and is an integer
  • k2 ⁇ 1 is an integer.
  • the UE first reports an indication of the M reference signal resources according to the result of the measurement reference signal, where the indication of each reference signal resource is used to indicate the number of the reference signal resource and the quality information of the reference signal resource. .
  • the UE further determines the RI according to the indication of the reported M reference signal resources.
  • the time at which the UE reports the M reference signal resources may be different from the time at which the RI is reported.
  • the M reference signal resource indications on which the RI is reported are the M reference signal resource indications that were last reported before the reporting time.
  • the UE further reports at least one of a PMI, a CQI, a channel covariance matrix, and a channel feature vector based on the reported M reference signal resource indications and RIs.
  • the precoding matrix indicated by the reported PMI includes an M ⁇ n column, where the precoding matrix is used to perform a total of M ⁇ n ports of the M first reference signal resources indicated by the M reference signal resource indications that are reported.
  • the target PMI can report one for the entire bandwidth or one for each sub-band.
  • the reported channel covariance matrix may include M covariance matrices, wherein each covariance matrix is a covariance matrix of n ports of the reference signal resources of the M reference signal resources to the UE. .
  • the reported channel covariance matrix includes a covariance matrix, which is a covariance matrix of the M ⁇ n ports of the M reference signal resources to the UE, that is, a target for the measurement of the M first reference signal resources. Covariance matrix.
  • the target covariance matrix can report one for the entire bandwidth or one for each subband.
  • the reported channel feature vector may include M channel feature vectors, where each channel feature vector is a channel feature vector of n ports of the reference signal resource of the M reference signal resources to the channel of the UE.
  • the reported channel feature vector includes a channel feature vector, which is a channel feature vector of the M ⁇ n ports of the M reference signal resources to the UE, that is, a target channel is synthesized for the measurement of the M first reference signal resources.
  • Feature vector The target channel feature vector may report one for the entire bandwidth or one for each sub-band.
  • the CQI is calculated based on the reported M reference signal resource indications, RI and PMI calculations, or based on the reported M reference signal resource indications, RIs, channel covariance matrices, or channel feature vectors.
  • the time at which the UE reports the PMI, the CQI, the channel covariance matrix, and the channel feature vector may be different from the time at which the RI is reported.
  • the RI on which the PMI, the CQI, the channel covariance matrix, and the channel feature vector are reported is the most recent report before the reporting time. RI.
  • the feedback period indicated by the M reference signal resources is the fourth feedback period
  • the feedback period of the RI is the fifth feedback period
  • the feedback period of the PMI and the CQI is the sixth feedback period
  • the fourth feedback period is k3 times the fifth feedback period
  • the fifth feedback period is k4 times the sixth feedback period
  • the foregoing PMI may also be used to report a set of linear combination coefficients of a total of M ⁇ n ports of the selected M reference signal resources.
  • the specific solution method is similar to the solution method of the combination coefficient in the first feedback mode, and will not be described again.
  • the PMI, the CQI, the channel covariance matrix, and the channel feature vector reported by the UE may be obtained based on the measurement of the N second measurement reference resources.
  • the N first measurement reference resources are associated with the N second reference signal resources, for example, the beam direction of the ith second reference signal resource is similar to the beam direction of the ith first reference signal resource, and the ith is
  • the ports of the second reference signal resources include ports of the i-th first reference signal resource.
  • the beam direction of the ith second reference signal resource is similar to the beam direction of the ith first reference signal resource, and the beam width of the ith second reference signal resource may be greater than the ith first reference signal resource The width of the beam is narrower.
  • the ith second reference signal resource corresponds to a set of beams, the direction of the set of beams being similar to the beam of the associated i-th first reference signal resource.
  • the specific relationship may also be in other forms and is not excluded here.
  • the base station may configure a corresponding second reference signal resource based on the M reference signal resource indications reported by the UE.
  • the UE may measure the corresponding second reference signal resource according to the association relationship.
  • FIG. 5A is a schematic diagram of a relationship between a first reference signal resource and a second reference signal resource in the channel state information feedback method of the present application.
  • FIG. 5B is a schematic diagram of another relationship between a first reference signal resource and a second reference signal resource in the channel state information feedback method of the present application.
  • Each of the first reference signal resources is associated with a second reference signal resource.
  • Each of the second reference signal resources has four ports, one for each beam direction.
  • the beam direction corresponding to each second reference signal resource is substantially consistent with the beam direction of the associated first reference signal resource.
  • Each of the first reference signal resources is associated with a second reference signal resource.
  • Each of the second reference signal resources has two ports, one for each group of beams, and each group of beams includes two beams. The direction of the two beams of the beam group corresponding to each second reference signal resource is substantially consistent with the beam direction of the associated first reference signal resource.
  • FIG. 6 is a schematic structural diagram of Embodiment 1 of a user equipment according to the present application.
  • the user equipment provided in this embodiment may implement various steps of the method applied to the user equipment provided by any embodiment of the present application.
  • the user equipment 100 provided in this embodiment includes:
  • the receiving module 11 is configured to receive N first reference signal resources configured by the base station, where each of the first reference signal resources of the N first reference signal resources includes at least one port, N ⁇ 2, and is an integer;
  • the processing module 12 is configured to determine, according to the feedback mode, a channel state indication CSI and M first reference signal resource indication information, where the feedback mode indicates each element in the CSI, and the M first reference signal resource indication information Determining an order, the CSI comprising at least one of: a rank indication RI, a precoding matrix indication PMI, a channel quality indication CQI, a channel covariance matrix or a channel eigenvector;
  • the sending module 13 is configured to report the CSI and M first reference signal resource indication information to the base station;
  • the M first reference signal resource indication information indicates index and/or quality information of each of the first reference signal resources, and the M first reference signal resources are M first reference signal resources among the N first reference signal resources, M ⁇ N, and being an integer.
  • the user equipment after receiving the N first reference signal resources configured by the base station, determining the CSI and the M first reference signal indication information of the first reference signal resources according to the feedback mode, and feeding back the CSI to the base station And M first reference signal resource indication information.
  • the UE feeds back the CSI of the horizontal direction of the M first reference signal resources and the M first reference signal resource indication information to the base station, so that the base station determines the channel of the vertical dimension according to the first reference signal resource indication information.
  • the state information finally obtains channel state information of two dimensions, and solves the drawback of only channel state information of the horizontal dimension in the traditional channel estimation.
  • the feedback mode includes a first feedback mode
  • the processing module 12 is configured to determine, according to the N first reference signal resources, at least one element in the CSI, and determine, according to the at least one element in the CSI, in the first feedback mode.
  • the M first reference signal resource indication information is described.
  • the at least one element in the CSI is an RI that is recently reported by the UE before determining the M first reference signal resource indication information, and the processing module 12 Specifically, in the first feedback mode, determining the most recently reported RI according to the N first reference signal resources, and determining the M first reference signals based on the last reported RI Resource indication information.
  • the processing module 12 is further configured to determine, according to the association relationship, M second reference signal resources, where the association relationship is the M first reference signal resources and Determining an association relationship between the M second reference signal resources; determining, in the PMI, the CQI, the channel covariance matrix, or the channel feature vector, according to the last reported RI and the M second reference signal resources at least one;
  • the sending module 13 is further configured to report at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector to the base station.
  • the feedback period of the RI is a first feedback period
  • the feedback period of the M first reference signal resource indication information is a second feedback period
  • the PMI and the CQI are The feedback period is a third feedback period
  • the first feedback period is k1 times the second feedback period
  • the second feedback period is k2 times the third feedback period, k1 ⁇ 1 and is an integer, k2 ⁇ 1 and an integer.
  • the processing module 12 determines, according to the N first reference signal resources, the RI that was last reported, and determines the RI based on the last reported RI.
  • the M first reference signal resource indication information is specifically used to determine, according to the N first reference signal resources, the most recently reported RI according to the first feedback mode, and according to the latest reported
  • the RI queries the correspondence table to determine the M first reference signal resource indication information, and the correspondence relationship table stores a correspondence between the RI and the M.
  • the feedback mode includes a second feedback mode
  • the processing module 12 is configured to: according to the N first feedback signals, the UE according to the N first reference signals.
  • the resource determines the M first reference signal resource indication information, and determines the CSI based on the M first reference signal resources indicated by the M first reference signal resource indication information.
  • the M first reference signal resource indication information is M first reference signal resource indication information that is reported by the UE before the CSI is determined.
  • the processing module 12 is specifically configured to determine, according to the N first reference signal resources, the M first reference signal resources in the second feedback mode. Instructing information, and determining an RI in the CSI based on the M first reference signal resources indicated by the M first reference signal resource indication information.
  • the processing module 12 determines, according to the N first reference signal resources, the M first reference signal resource indication information in the second feedback mode, After determining the RI in the CSI, the M first reference signal resources indicated by the M first reference signal resource indication information are further used to determine M second reference signal resources according to the association relationship, where the association is performed. a relationship between the M first reference signal resources and the M second reference signal resources; determining, according to the M second reference signal resources and the RI, a PMI in the CSI, At least one of a CQI, a channel covariance matrix, or a channel eigenvector;
  • the sending module 13 is further configured to report at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector to the base station.
  • the feedback period of the M first reference signal resource indication information is a fourth feedback period
  • the feedback period of the RI in the CSI is a fifth feedback period
  • the CSI is The feedback period of the PMI and the CQI is a sixth feedback period
  • the fourth feedback period is k3 times the fifth feedback period
  • the fifth feedback period is k4 times of the sixth feedback period
  • k3 ⁇ 1 is an integer
  • the processing module 12 is further configured to determine, according to the last reported RI and the M second reference signal resources, a set of CSIs, the M sets of CSIs.
  • Each set of CSI includes at least one of a PMI, a CQI, a channel covariance matrix, or a channel feature vector; the M sets of CSIs are combined into a destination CSI, where the destination CSI includes a destination PMI, a destination CQI, a destination channel covariance matrix, or At least one of the destination channel feature vectors;
  • the sending module 13 is specifically configured to report, to the base station, a base vector, a port index, or a composite coefficient of the destination PMI, so that the base station determines, according to a base vector, a port index, or a composite coefficient of the destination PMI,
  • the PMI is described, and the target CQI is obtained according to the target PMI.
  • the receiving module 11 is further configured to receive the feedback mode configured by the base station by using high layer signaling or dynamic signaling.
  • the sending module 13 is further configured to feed back the feedback mode to the base station.
  • FIG. 7 is a schematic structural diagram of Embodiment 1 of a base station according to the present application.
  • the base station provided in this embodiment may implement various steps of the method applied to the base station provided by any embodiment of the present application.
  • the base station 200 provided in this embodiment includes:
  • the processing module 21 is configured to configure N first reference signal resources, where each of the first reference signal resources of the N first reference signal resources includes at least one port, N ⁇ 2, and is an integer;
  • the sending module 22 is configured to send the N first reference signal resources to the user equipment UE;
  • the receiving module 23 is configured to receive a CSI and M first reference signal resource indication information that is reported by the UE according to the feedback mode, where the feedback mode indicates each element in the CSI, and the M first reference Determining a sequence of signal resource indication information, the CSI including at least one of: a rank indication RI, a precoding matrix indication PMI, a channel quality indication CQI, a channel covariance matrix, or a channel feature vector;
  • the M first reference signal resource indication information indicates index and/or quality information of each of the first reference signal resources, and the M first reference signal resources are M first reference signal resources among the N first reference signal resources, M ⁇ N, and being an integer.
  • the base station provided by the present application configures N first reference signal resources for the UE and sends the information to the UE.
  • the UE After receiving the first reference signal resources, the UE determines CSI and M of the first reference signal resources according to the feedback mode.
  • the CSI and the M first reference signal resource indication information are fed back to the base station.
  • the UE feeds back the CSI of the horizontal direction of the M first reference signal resources and the M first reference signal resource indication information to the base station, so that the base station determines the channel of the vertical dimension according to the first reference signal resource indication information.
  • the state information finally obtains channel state information of two dimensions, and solves the drawback of only channel state information of the horizontal dimension in the traditional channel estimation.
  • the feedback mode includes a first feedback mode
  • the receiving module 23 is configured to receive, in the first feedback mode, the M first reference signal resource indication information that is determined by the UE based on at least one element in the CSI, where At least one element is determined by the UE according to the N first reference signal resources.
  • the at least one element in the CSI is an RI that is recently reported by the UE before determining the M first reference signal resource indication information
  • the receiving module 23 Specifically, in the first feedback mode, receiving the M first reference signal resource indication information that is determined by the UE according to the last reported RI, where the last reported RI is the The UE determines according to the N first reference signal resources.
  • the receiving module 23, in the first feedback mode receives the M first reference signals that are determined by the UE according to the last reported RI.
  • the method further includes: receiving at least one of a PMI, a CQI, a channel covariance matrix, or a channel feature vector reported by the UE, where at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector is And determining, by the UE, that the M second reference signal resources are determined according to the association relationship, where the association relationship is the M, according to the last reported RI and the M second reference signal resources. Association between the first reference signal resource and the M second reference signal resources.
  • the feedback period of the RI is a first feedback period
  • the feedback period of the M first reference signal resource indication information is a second feedback period
  • the PMI and the CQI are The feedback period is a third feedback period
  • the first feedback period is k1 times the second feedback period
  • the second feedback period is k2 times the third feedback period, k1 ⁇ 1 and is an integer, k2 ⁇ 1 and an integer.
  • the M first reference signal resource indication information is that the UE determines the last reported RI according to the N first reference signal resources, and according to the The RI query correspondence table that is recently reported is determined, and the correspondence relationship table stores a correspondence between RI and M.
  • the feedback mode includes a second feedback mode
  • the receiving module 23 is configured to receive, in the second feedback mode, the CSI that is determined by the UE based on the M first reference signal resource indication information, and the M first reference signal resource indications The information is determined by the UE according to the N first reference signal resources.
  • the M first reference signal resource indication information is M first reference signal resource indication information that is reported by the UE before the CSI is determined.
  • the receiving module 23 is configured to receive, according to the second feedback mode, an RI determined by the UE according to the M first reference signal resources.
  • the receiving module 23, after receiving the RI determined by the UE according to the M first reference signal resources, is further configured to receive the PMI reported by the UE, At least one of a CQI, a channel covariance matrix, or a channel feature vector, wherein at least one of the PMI, the CQI, the channel covariance matrix, or the channel feature vector is determined by the UE according to the M second reference signal resources.
  • the M second reference signal resources are determined by the UE according to the association relationship, and the association relationship is an association relationship between the M first reference signal resources and the M second reference signal resources.
  • the feedback period of the M first reference signal resource indication information is a fourth feedback period
  • the feedback period of the RI in the CSI is a fifth feedback period
  • the CSI is The feedback period of the PMI and the CQI is a sixth feedback period
  • the fourth feedback period is k3 times the fifth feedback period
  • the fifth feedback period is k4 times of the sixth feedback period
  • k3 ⁇ 1 is an integer
  • the receiving module 23 is specifically configured to receive a destination CSI reported by the UE, where the destination CSI includes a destination PMI, a destination CQI, a destination channel covariance matrix, or a destination channel. At least one of the feature vectors; the destination CSI is obtained by the UE to the M-set CSI, and the M-set CSI is the RI and the M second reference signal resources of the UE according to the latest report. Determined.
  • the sending module 22 is further configured to send high-level signaling or dynamic information to the UE, where the high-level signaling or dynamic signaling carries the feedback mode.
  • the receiving module 23 is further configured to receive the feedback mode fed back by the UE.
  • Embodiment 2 of a user equipment is a schematic structural diagram of Embodiment 2 of a user equipment according to the present application.
  • the user equipment provided in this example includes: a processor 31, a memory 32, a communication interface 33, and a system bus 34, and the memory 32 and the communication interface 33 pass the
  • the system bus 34 is coupled to the processor 31 for communication with each other, the memory 32 for storing computer execution instructions, the communication interface 33 for communicating with other devices, and the processor 31 for operating the system
  • the computer executes instructions to cause the user equipment to perform the various steps of the method as applied to the user equipment as above.
  • FIG. 9 is a schematic structural diagram of Embodiment 2 of a base station according to the present application.
  • the base station provided in this embodiment includes: a processor 41, a memory 42, a communication interface 43, and a system bus 44, and the memory 42 and the communication interface 43 pass the system.
  • a bus 44 is coupled to the processor 41 for communicating with each other, the memory 42 for storing computer execution instructions, the communication interface 43 for communicating with other devices, and the processor 41 for operating the The computer executes instructions to cause the base station to perform the various steps of the method as applied to the base station as above.
  • the system bus mentioned in FIG. 8 and FIG. 9 above may be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the system bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in the figure, but it does not mean that there is only one bus or one type of bus.
  • the communication interface is used to implement communication between the database access device and other devices such as clients, read-write libraries, and read-only libraries.
  • the memory may include random access memory (RAM), and may also include non-volatile memory, such as at least one disk storage.
  • the above processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; or may be a digital signal processing (DSP), dedicated integration.
  • CPU central processing unit
  • NP network processor
  • DSP digital signal processing
  • ASIC Application Specific Integrated Circuit
  • FPGA Field-Programmable Gate Array

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本申请提供一种信道状态信息反馈方法、用户设备及基站，基站为UE配置N个第一参考信号资源并发送给UE，UE在接收到该些第一参考信号资源后，根据反馈模式确定该些第一参考信号资源的CSI以及M个第一参考信号指示信息后，向基站反馈CSI和M个第一参考信号资源指示信息。该过程中，UE将该M个第一参考信号资源的水平维度的CSI与该M个第一参考信号资源指示信息反馈给基站，使得基站根据第一参考信号资源指示信息确定出垂直维度的信道状态信息，从而最终获得两个维度的信道状态信息，解决传统信道估计中，仅反馈水平维度信道状态信息的弊端。

Description

信道状态信息反馈方法、用户设备及基站
本申请要求于2017年1月9日提交中国专利局、申请号为201710014457.1、申请名称为“信道状态信息反馈方法、用户设备及基站”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术，尤其涉及一种信道状态信息反馈方法、用户设备及基站。
背景技术
长期演进(Long Term Evolution，LTE)系统中，传统天线阵列在垂直方向具有固定的下倾角，即对小区内每个用户设备在垂直方向上提供固定的波束。为提高小区边缘用户吞吐率和小区平均吞吐率，引入三维(3 Dimension，3D)波束赋形(Beaming Forming，BF)技术。3D波束赋形技术基于有源天线系统(Active Antenna System，AAS)，可根据用户设备的位置，在垂直方向为每个用户设备产生不同下倾角的波束，从而在水平方向和垂直方向都进行波束赋形。为支持3D波束赋形技术，需要相应的信道状态信息的反馈。其中，信道状态信息包括信道质量指示(Channel Quality Indicator，CQI)、预编码矩阵指示指示(Precoding Matrix Indicator，PMI)以及秩指示(Rank Indication，RI)等。
一般来说，信道状态信息由用户设备通过信道估计得出。传统信道估计过程中，用户设备对参考信号(Reference Signal，RS)，也称导频信号，如信道状态信息参考信号(Channel State Information-Reference Signals，CSI-RS)进行测量，从而估计出水平维度的信道状态信息并上报给基站。然而，对于3D波束赋形技术来说，用户设备除了对水平维度信道进行信道估计外，还需要对垂直维度信道进行信道估计。显然，仅支持水平维度信道估计的传统信道估计方法，是无法适用于3D波束赋形技术的。
因此，如何提出一种信道状态信息反馈方法，实为业界亟待解决的问题。
发明内容
本申请提供一种信道状态信息反馈方法、用户设备及基站，解决传统信道估计中，仅反馈水平维度信道状态信息的弊端。
第一方面，本申请提供一种信道状态信息反馈方法，该方法是从用户设备的角度描述，该方法中，基站为UE配置N个第一参考信号资源并发送给UE，UE在接收到该些第一参考信号资源后，根据反馈模式确定该些第一参考信号资源的CSI以及M个第一参考信号指示信息后，向基站反馈CSI和M个第一参考信号资源指示信息。
通过上述方法，UE将该M个第一参考信号资源的水平维度的CSI与该M个第一参考信号资源指示信息反馈给基站，使得基站根据第一参考信号资源指示信息确定出垂直维度的信道状态信息，从而最终获得两个维度的信道状态信息，解决传统信道估计中，仅反馈水平维度信道状态信息的弊端。
在一种可行的设计中，所述反馈模式包括第一反馈模式；
所述UE根据反馈模式确定信道状态指示CSI和M个第一参考信号资源指示信息，包括：
所述第一反馈模式下，所述UE根据所述N个第一参考信号资源确定所述CSI中的至少一个元素，并基于所述CSI中的至少一个元素确定所述M个第一参考信号资源指示信息。
在一种可行的设计中，所述CSI中的至少一个元素为所述UE在确定所述M个第一参考信号资源指示信息之前、最近一次上报的RI，所述第一反馈模式下，所述UE根据所述N个第一参考信号资源确定所述CSI中的至少一个元素，并基于所述CSI中的至少一个元素确定所述M个第一参考信号资源指示信息，包括：
所述第一反馈模式下，所述UE根据所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上报的RI确定所述M个第一参考信号资源指示信息。
在一种可行的设计中，所述第一反馈模式下，所述UE所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上报的RI确定所述M个第一参考信号资源指示信息之后，还包括：
所述UE根据关联关系，确定M个第二参考信号资源，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系；
所述UE根据所述最近一次上报的RI和所述M个第二参考信号资源，确定所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
所述UE向所述基站上报所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。
在一种可行的设计中，所述RI的反馈周期为第一反馈周期，所述M个第一参考信号资源指示信息的反馈周期为第二反馈周期，所述PMI和CQI的反馈周期为第三反馈周期，所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
在一种可行的设计中，所述第一反馈模式下，所述UE根据所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上报的RI确定所述M个第一参考信号资源指示信息，包括：
所述第一反馈模式下，所述UE根据所述N个第一参考信号资源确定所述最近一次上报的RI，并根据所述最近一次上报的RI查询对应关系表以确定所述M个第一参考信号资源指示信息，所述对应关系表存储RI与M之间存在对应关系。
在一种可行的设计中，所述反馈模式包括第二反馈模式；
所述UE根据反馈模式确定信道状态指示CSI和M个第一参考信号资源指示信息，包括：所述第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI。
在一种可行的设计中，所述M个第一参考信号资源指示信息为所述UE在确定所述CSI之前、最近一次上报的M个第一参考信号资源指示信息。
在一种可行的设计中，所述第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信 息指示的M个第一参考信号资源确定所述CSI，包括：
所述第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI中的RI。
在一种可行的设计中，所述第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI中的RI之后，还包括：
所述UE根据关联关系，确定M个第二参考信号资源，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系；
所述UE根据所述M个第二参考信号资源以及所述RI，确定所述CSI中的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
所述UE向所述基站上报所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。
在一种可行的设计中，所述M个第一参考信号资源指示信息的反馈周期为第四反馈周期，所述CSI中的RI的反馈周期为第五反馈周期，所述CSI中的PMI和CQI的反馈周期为第六反馈周期，所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
在一种可行的设计中，所述UE向所述基站上报所述PMI或CQI中的至少一个，包括：
所述UE根据所述最近一次上报的RI和所述M个第二参考信号资源，确定M套CSI，所述M套CSI中每一套CSI包括PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
所述UE将所述M套CSI合成目的CSI，所述目的CSI包括目的PMI、目的CQI、目的信道协方差矩阵或目的信道特征向量中的至少一个；
所述UE向所述基站上报所述目的PMI的基向量、端口索引或合成系数，以使得所述基站根据所述目的PMI的基向量、端口索引或合成系数确定出所述目的PMI，并根据所述目的PMI获得所述目的CQI。
在一种可行的设计中，上述的方法还包括：
所述UE接收所述基站通过高层信令或动态信令配置的所述反馈模式。
在一种可行的设计中，上述的方法还包括：
所述UE向所述基站反馈所述反馈模式。
第二方面，本申请提供一种信道状态信息反馈方法，包括：
基站配置N个第一参考信号资源，所述N个第一参考信号资源中的各所述第一参考信号资源包括至少一个端口，N≥2，且为整数；
所述基站向用户设备UE发送所述N个第一参考信号资源；
所述基站接收所述UE根据反馈模式上报的信道状态指示CSI和M个第一参考信号资源指示信息，所述反馈模式指示所述CSI中的各个元素、所述M个第一参考信号资源指示信息的确定顺序，所述CSI包括以下元素的至少一个：秩指示RI、预编码矩阵指示PMI、信道质量指示CQI、信道协方差矩阵或信道特征向量；
其中，所述M个第一参考信号资源指示信息指示M个第一参考信号资源中，每个第 一参考信号资源的索引和/或质量信息，所述M个第一参考信号资源为所述N个第一参考信号资源中的M个第一参考信号资源，M≤N，且为整数。
在一种可行的设计中，所述反馈模式包括第一反馈模式；所述基站接收所述UE根据反馈模式上报的信道状态指示CSI和M个第一参考信号资源指示信息，包括：
所述第一反馈模式下，所述基站接收所述UE基于所述CSI中的至少一个元素确定的所述M个第一参考信号资源指示信息，所述CSI中的至少一个元素为所述UE根据所述N个第一参考信号资源确定的。
在一种可行的设计中，所述CSI中的至少一个元素为所述UE在确定所述M个第一参考信号资源指示信息之前、最近一次上报的RI，所述第一反馈模式下，所述基站接收所述UE基于所述CSI中的至少一个元素确定的所述M个第一参考信号资源指示信息，包括：
所述第一反馈模式下，所述基站接收所述UE根据所述最近一次上报的RI确定出的所述M个第一参考信号资源指示信息，所述最近一次上报的RI为所述UE根据所述N个第一参考信号资源确定的。
在一种可行的设计中，所述第一反馈模式下，所述基站接收所述UE根据所述最近一次上报的RI确定出的所述M个第一参考信号资源指示信息之后，还包括：
所述基站接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个为所述UE根据所述最近一次上报的RI和M个第二参考信号资源确定出的，所述M个第二参考信号资源为所述根据关联关系确定出的，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系。
在一种可行的设计中，所述RI的反馈周期为第一反馈周期，所述M个第一参考信号资源指示信息的反馈周期为第二反馈周期，所述PMI和CQI的反馈周期为第三反馈周期，所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
在一种可行的设计中，所述M个第一参考信号资源指示信息为所述UE根据所述N个第一参考信号资源确定出所述最近一次上报的RI，并根据所述最近一次上报的RI查询对应关系表确定出的，所述对应关系表存储RI与M之间存在对应关系。
在一种可行的设计中，所述反馈模式包括第二反馈模式；
所述基站接收所述UE根据反馈模式上报的信道状态指示CSI和M个第一参考信号资源指示信息，包括：
所述第二反馈模式下，所述基站接收所述UE基于所述M个第一参考信号资源指示信息确定出的所述CSI，所述M个第一参考信号资源指示信息为所述UE根据所述N个第一参考信号资源确定出的。
在一种可行的设计中，所述M个第一参考信号资源指示信息为所述UE在确定所述CSI之前、最近一次上报的M个第一参考信号资源指示信息。
在一种可行的设计中，所述第二反馈模式下，所述基站接收所述UE基于所述M个第一参考信号资源指示信息确定出的所述CSI，包括：
所述基站接收所述UE根据所述M个第一参考信号资源确定出的RI。
在一种可行的设计中，所述基站接收所述UE根据所述M个第一参考信号资源确定出 的RI之后，还包括：
所述基站接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个为所述UE根据M个第二参考信号资源确定出的，所述M个第二参考信号资源为所述UE根据关联关系确定出，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系。
在一种可行的设计中，所述M个第一参考信号资源指示信息的反馈周期为第四反馈周期，所述CSI中的RI的反馈周期为第五反馈周期，所述CSI中的PMI和CQI的反馈周期为第六反馈周期，所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
在一种可行的设计中，所述基站接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，包括：
所述基站接收所述UE上报的目的目的CSI，所述目的CSI包括目的PMI、目的CQI、目的信道协方差矩阵或目的信道特征向量中的至少一个；所述目的CSI为所述UE对M套CSI合成得到的，所述M套CSI为所述UE根据所述最近一次上报的RI和所述M个第二参考信号资源确定出的。
在一种可行的设计中，上述的方法还包括：
所述基站向所述UE发送高层信令或动态信息，所述高层信令或动态信令中携带所述反馈模式。
在一种可行的设计中，上述的方法还包括：
所述接着接收所述UE反馈的所述反馈模式。
第三方面，本申请提供一种用户设备，包括：
接收模块，用于接收基站配置的N个第一参考信号资源，所述N个第一参考信号资源中的各所述第一参考信号资源包括至少一个端口，N≥2，且为整数；
处理模块，用于根据反馈模式确定信道状态指示CSI和M个第一参考信号资源指示信息，所述反馈模式指示所述CSI中的各个元素、所述M个第一参考信号资源指示信息的确定顺序，所述CSI包括以下元素的至少一个：秩指示RI、预编码矩阵指示PMI、信道质量指示CQI、信道协方差矩阵或信道特征向量；
发送模块，用于向所述基站上报所述CSI和M个第一参考信号资源指示信息；
其中，所述M个第一参考信号资源指示信息指示M个第一参考信号资源中，每个第一参考信号资源的索引和/或质量信息，所述M个第一参考信号资源为所述N个第一参考信号资源中的M个第一参考信号资源，M≤N，且为整数。
在一种可行的设计中，所述反馈模式包括第一反馈模式；
所述处理模块，具体用于在所述第一反馈模式下，根据所述N个第一参考信号资源确定所述CSI中的至少一个元素，并基于所述CSI中的至少一个元素确定所述M个第一参考信号资源指示信息。
在一种可行的设计中，所述CSI中的至少一个元素为所述UE在确定所述M个第一参考信号资源指示信息之前、最近一次上报的RI，所述处理模块，具体用于在所述第一反馈模式下，根据所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一 次上报的RI确定所述M个第一参考信号资源指示信息。
在一种可行的设计中，所述处理模块，还用于根据关联关系，确定M个第二参考信号资源，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系；根据所述最近一次上报的RI和所述M个第二参考信号资源，确定所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
所述发送模块，还用于向所述基站上报所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。
在一种可行的设计中，所述RI的反馈周期为第一反馈周期，所述M个第一参考信号资源指示信息的反馈周期为第二反馈周期，所述PMI和CQI的反馈周期为第三反馈周期，所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
在一种可行的设计中，所述处理模块，在根据所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上报的RI确定所述M个第一参考信号资源指示信息时，具体用于在所述第一反馈模式下，根据所述N个第一参考信号资源确定所述最近一次上报的RI，并根据所述最近一次上报的RI查询对应关系表以确定所述M个第一参考信号资源指示信息，所述对应关系表存储RI与M之间存在对应关系。
在一种可行的设计中，所述反馈模式包括第二反馈模式；所述处理模块，具体用于在第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI。
在一种可行的设计中，所述M个第一参考信号资源指示信息为所述UE在确定所述CSI之前、最近一次上报的M个第一参考信号资源指示信息。
在一种可行的设计中，所述处理模块，具体用于在所述第二反馈模式下，根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI中的RI。
在一种可行的设计中，所述处理模块，在所述第二反馈模式下，根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI中的RI之后，还用于根据关联关系，确定M个第二参考信号资源，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系；根据所述M个第二参考信号资源以及所述RI，确定所述CSI中的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
所述发送模块，还用于向所述基站上报所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。
在一种可行的设计中，所述M个第一参考信号资源指示信息的反馈周期为第四反馈周期，所述CSI中的RI的反馈周期为第五反馈周期，所述CSI中的PMI和CQI的反馈周期为第六反馈周期，所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
在一种可行的设计中，所述处理模块，还用于根据所述最近一次上报的RI和所述M个第二参考信号资源，确定M套CSI，所述M套CSI中每一套CSI包括PMI、CQI、信道 协方差矩阵或信道特征向量中的至少一个；将所述M套CSI合成目的CSI，所述目的CSI包括目的PMI、目的CQI、目的信道协方差矩阵或目的信道特征向量中的至少一个；
所述发送模块，具体用于向所述基站上报所述目的PMI的基向量、端口索引或合成系数，以使得所述基站根据所述目的PMI的基向量、端口索引或合成系数确定出所述目的PMI，并根据所述目的PMI获得所述目的CQI。
在一种可行的设计中，所述接收模块，还用于接收所述基站通过高层信令或动态信令配置的所述反馈模式。
在一种可行的设计中，所述发送模块，还用于向所述基站反馈所述反馈模式。
第四方面，本申请提供一种基站，包括：
处理模块，用于配置N个第一参考信号资源，所述N个第一参考信号资源中的各所述第一参考信号资源包括至少一个端口，N≥2，且为整数；
发送模块，用于向用户设备UE发送所述N个第一参考信号资源；
接收模块，用于接收所述UE根据反馈模式上报的信道状态指示CSI和M个第一参考信号资源指示信息，所述反馈模式指示所述CSI中的各个元素、所述M个第一参考信号资源指示信息的确定顺序，所述CSI包括以下元素的至少一个：秩指示RI、预编码矩阵指示PMI、信道质量指示CQI、信道协方差矩阵或信道特征向量；
其中，所述M个第一参考信号资源指示信息指示M个第一参考信号资源中，每个第一参考信号资源的索引和/或质量信息，所述M个第一参考信号资源为所述N个第一参考信号资源中的M个第一参考信号资源，M≤N，且为整数。
在一种可行的设计中，所述反馈模式包括第一反馈模式；
所述接收模块，具体用于在所述第一反馈模式下，接收所述UE基于所述CSI中的至少一个元素确定的所述M个第一参考信号资源指示信息，所述CSI中的至少一个元素为所述UE根据所述N个第一参考信号资源确定的。
在一种可行的设计中，所述CSI中的至少一个元素为所述UE在确定所述M个第一参考信号资源指示信息之前、最近一次上报的RI，所述接收模块，具体用于在所述第一反馈模式下，接收所述UE根据所述最近一次上报的RI确定出的所述M个第一参考信号资源指示信息，所述最近一次上报的RI为所述UE根据所述N个第一参考信号资源确定的。
在一种可行的设计中，所述接收模块，在所述第一反馈模式下，接收所述UE根据所述最近一次上报的RI确定出的所述M个第一参考信号资源指示信息之后，还用于接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个为所述UE根据所述最近一次上报的RI和M个第二参考信号资源确定出的，所述M个第二参考信号资源为所述根据关联关系确定出的，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系。
在一种可行的设计中，所述RI的反馈周期为第一反馈周期，所述M个第一参考信号资源指示信息的反馈周期为第二反馈周期，所述PMI和CQI的反馈周期为第三反馈周期，所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
在一种可行的设计中，所述M个第一参考信号资源指示信息为所述UE根据所述N个 第一参考信号资源确定出所述最近一次上报的RI，并根据所述最近一次上报的RI查询对应关系表确定出的，所述对应关系表存储RI与M之间存在对应关系。
在一种可行的设计中，所述反馈模式包括第二反馈模式；
所述接收模块，具体用于在所述第二反馈模式下接收所述UE基于所述M个第一参考信号资源指示信息确定出的所述CSI，所述M个第一参考信号资源指示信息为所述UE根据所述N个第一参考信号资源确定出的。
在一种可行的设计中，所述M个第一参考信号资源指示信息为所述UE在确定所述CSI之前、最近一次上报的M个第一参考信号资源指示信息。
在一种可行的设计中，所述接收模块，具体用于在所述第二反馈模式下，接收所述UE根据所述M个第一参考信号资源确定出的RI。
在一种可行的设计中，所述接收模块，在接收所述UE根据所述M个第一参考信号资源确定出的RI之后，还用于接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个为所述UE根据M个第二参考信号资源确定出的，所述M个第二参考信号资源为所述UE根据关联关系确定出，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系。
在一种可行的设计中，所述M个第一参考信号资源指示信息的反馈周期为第四反馈周期，所述CSI中的RI的反馈周期为第五反馈周期，所述CSI中的PMI和CQI的反馈周期为第六反馈周期，所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
在一种可行的设计中，所述接收模块，具体用于接收所述UE上报的目的目的CSI，所述目的CSI包括目的PMI、目的CQI、目的信道协方差矩阵或目的信道特征向量中的至少一个；所述目的CSI为所述UE对M套CSI合成得到的，所述M套CSI为所述UE根据所述最近一次上报的RI和所述M个第二参考信号资源确定出的。
在一种可行的设计中，所述发送模块，还用于向所述UE发送高层信令或动态信息，所述高层信令或动态信令中携带所述反馈模式。
在一种可行的设计中，所述接收模块，还用于接收所述UE反馈的所述反馈模式。
第五方面，本申请提供一种用户设备，包括处理器、存储器、通信接口和系统总线，所述存储器和所述通信接口通过所述系统总线与所述处理器连接并完成相互间的通信，所述存储器用于存储计算机执行指令，所述通信接口用于和其他设备进行通信，所述处理器用于运行所述计算机执行指令，使所述用户设备执行如上应用于用户设备的方法的各个步骤。
第六方面，本申请提供一种基站，包括处理器、存储器、通信接口和系统总线，所述存储器和所述通信接口通过所述系统总线与所述处理器连接并完成相互间的通信，所述存储器用于存储计算机执行指令，所述通信接口用于和其他设备进行通信，所述处理器用于运行所述计算机执行指令，使所述基站执行如上应用于基站的方法的各个步骤。
第七方面，本申请提供一种计算机存储介质，用于储存为上述用户设备所用的计算机软件指令，其包含用于执行上述第一方面或第一方面各可行的实现方式所设计的程序。
第八方面，本申请提供了一种计算机存储介质，用于储存为上述基站所用的计算机软 件指令，其包含用于执行上述第二方面或第二方面各可行的实现方式所设计的程序。
第九方面，本申请提供了一种芯片系统，包括：至少一个处理器，存储器，输入输出部分和总线；所述至少一个处理器通过所述总线获取所述存储器中的指令，以用于实现上述方法涉及中用户设备的设计功能。
第十方面，本申请提供了一种芯片系统，包括：至少一个处理器，存储器，输入输出部分和总线；所述至少一个处理器通过所述总线获取所述存储器中的指令，以用于实现上述方法涉及中基站的设计功能。
第十一方面，本申请提供一种用户设备包括：存储器和处理器，存储器用于存储程序指令，处理器用于调用存储器中的程序指令，实现上述各方法实施例中所述用户设备的功能。
第十二方面，本申请提供一种基站包括：存储器和处理器，存储器用于存储程序指令，处理器用于调用存储器中的程序指令，实现上述各方法实施例中所述基站的功能。
本申请提供的信道状态信息反馈方法、用户设备及基站，基站为UE配置N个第一参考信号资源并发送给UE，UE在接收到该些第一参考信号资源后，根据反馈模式确定该些第一参考信号资源的CSI以及M个第一参考信号指示信息后，向基站反馈CSI和M个第一参考信号资源指示信息。该过程中，UE将该M个第一参考信号资源的水平维度的CSI与该M个第一参考信号资源指示信息反馈给基站，使得基站根据第一参考信号资源指示信息确定出垂直维度的信道状态信息，从而最终获得两个维度的信道状态信息，解决传统信道估计中，仅反馈水平维度信道状态信息的弊端。
附图说明
图1为本申请信道状态信息反馈方法所适用的系统架构示意图；
图2为本申请提供的一种冗余版本生成方法的信令图；
图3A为本申请信道状态信息反馈方法实施例二的一个示意图；
图3B为本申请信道状态信息反馈方法实施例二的另一个示意图；
图4A为本申请信道状态信息反馈方法中参考信号资源发送方式的一个示意图；
图4B为本申请信道状态信息反馈方法中参考信号资源发送方式的另一个示意图；
图5A为本申请信道状态信息反馈方法中的一个第一参考信号资源和第二参考信号资源的关联关系示意图；
图5B为本申请信道状态信息反馈方法中的一个第一参考信号资源和第二参考信号资源的另一个关联关系示意图；
图6为本申请用户设备实施例一的结构示意图；
图7为本申请基站实施例一的结构示意图；
图8为本申请用户设备实施例二的结构示意图；
图9为本申请基站实施例二的结构示意图。
具体实施方式
图1为本申请信道状态信息反馈方法所适用的系统架构示意图。参照图1，本系统架 构中，至少存在一个基站，以及至少一个用户设备，基站与用户设备之间建立通信连接。其中，基站可以是全球移动通信系统(Global System for Mobile Communications，GSM)或宽带码多分址(Wideband Code Division Multiple Access，WCDMA)中的基站收发台(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB)，还可以是长期演进(Long Term Evolution，LTE)中的演进型基站(evolutional Node B，eNB)，或者是第五代移动通信(the 5th Generation Mobile Communication：5G)中的基站等，本申请并不限定。
用户设备，可以是有线终端，也可以是无线终端，该无线终端可以是指向用户提供语音和/或数据连通性的设备，具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。无线终端可以经无线接入网与一个或多个核心网进行通信，无线终端可以是移动终端，如移动电话(或称为“蜂窝”电话)和具有移动终端的计算机，例如，可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。再如，个人通信业务(Personal Communication Service，PCS)电话、无绳电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)等设备。无线终端也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、远程终端(Remote Terminal)、接入终端(Access Terminal)、用户终端(User Terminal)、用户代理(User Agent)、用户设备(User Device)、或用户装备(User Equipment)等。
图2为本申请提供的一种冗余版本生成方法的信令图，本实例包括：
101、用户设备UE接收基站配置的N个第一参考信号资源，所述N个第一参考信号资源中的各所述第一参考信号资源包括至少一个端口，N≥2，且为整数。
本步骤中，基站为UE配置N个第一参考信号资源，如N个信道状态信息参考信号(Channel State Information-Reference Signals，CSI-RS)资源。
102、所述基站向用户设备UE发送所述N个第一参考信号资源。
在配置好N个参考信号资源后，基站向UE发送该N个参考信号资源；相应的，UE接收基站配置的N个参考信号资源。
103、所述UE根据反馈模式确定信道状态指示CSI和M个第一参考信号资源指示信息。
在接收到N个第一参考信号资源后，UE根据反馈模式确定该N个第一参考信号资源的信道状态指示(Channel State Information，CSI)以及M个第一参考信号资源指示信息，该M个第一参考信号资源指示信息指示M个第一参考信号资源中，每个第一参考信号资源的索引和/或质量信息，所述M个第一参考信号资源为所述N个第一参考信号资源中的M个第一参考信号资源，M≤N，且为整数。例如，N个第一参考信号具体为10个第一参考信号资源，索引依次为1～10，M个第一参考信号资源为该10个第一参考信号资源中的第1个第一参考信号资源和第3个第一参考信号资源，第1个第一参考信号资源的质量为10分贝(dB)，第3个第一参考信号资源的质量为8db，则M个第一参考信号资源指示信息包括第1个参考信号资源指示信息以及第3参考信号资源指示信息，第1参考信号资源指示信息用于指示索引为1、质量为10db的第一参考信号资源，第3参考信号资源指示信息用于指示索引为3、质量为8db的第第一参考信号资源。
CSI包括以下元素的至少一个：信道质量指示(Channel Quality Indicator，CQI)、预编码矩阵指示指示(Precoding Matrix Indicator，PMI)、秩指示(Rank Indication，RI)、信道协方差矩阵以及信道特征向量等，反馈模式指示所述CSI中的各元素和所述M个第一参考信号资源指示信息的确定顺序。具体实现时，不同的反馈模式下，CSI中的各个元素、M个第一参考信号资源指示信息的确定顺序不同。例如，当信道的基站侧角度较大时，UE先根据N个测量参考信号资源确定CSI中的RI，再基于RI确定M第一个参考信号资源指示信息，然后基于RI和M个第一参考信号资源指示信息确定PMI、CQI、信道协方差矩阵以及信道特征向量中的至少一个；再如，当信道的基站侧角度较小时，UE先根据N个第一参考信号资源确定M个第一参考信号资源指示信息，在基于M个第一参考信号资源指示信息指示的M个第一参考信号资源，确定CSI中的RI，然后基于M个第一参考信号资源指示信息指示的M个第一参考信号资源以及确定出的RI，确定PMI、CQI、信道协方差矩阵以及信道特征向量中的至少一个；又如，UE先确定CSI中的所有元素，再基于所有元素，确定M个第一参考信号资源指示信息；又如，UE先确定M个第一参考信号资源指示信息，再基于M个第一参考信号资源指示信息指示的M个第一参考信号资源，确定CSI中的所有元素。
104、所述UE向所述基站上报所述CSI和M个第一参考信号资源指示信息。
在确定出CSI和M个参考信号资源指示信息后，UE向基站反馈该CSI和M个参考信号资源。
本申请提供的信道状态信息反馈方法，基站为UE配置N个第一参考信号资源并发送给UE，UE在接收到该些第一参考信号资源后，根据反馈模式确定该些第一参考信号资源的CSI以及M个第一参考信号指示信息后，向基站反馈CSI和M个第一参考信号资源指示信息。该过程中，UE将该M个第一参考信号资源的水平维度的CSI与该M个第一参考信号资源指示信息反馈给基站，使得基站根据第一参考信号资源指示信息确定出垂直维度的信道状态信息，从而最终获得两个维度的信道状态信息，解决传统信道估计中，仅反馈水平维度信道状态信息的弊端。
可选的，所述反馈模式包括第一反馈模式或第二反馈模式，第一反馈模式下，UE基于CSI中的至少一个元素确定M个第一参考信号资源指示信息；第二反馈模式下，UE基于M个第一参考信号资源指示信息确定CSI。下面，对第一反馈模式和第二反馈模式分别进行详细说明。
首先，第一反馈模式。
第一反馈模式下，UE根据所述N个第一参考信号资源确定所述CSI中的至少一个元素，并基于所述CSI中的至少一个元素确定M个第一参考信号资源指示信息，该至少一个元素例如为RI、PMI、CQI或信道协方差矩阵以及信道特征向量等。下面，以该至少一个元素具体为UE在确定M个第一参考信号资源指示信息之前、最近一次上报的RI为例，对第一反馈模式进行详细说明。具体的，可参见图3A，图3A为本申请信道状态信息反馈方法实施例二的一个示意图。
请参照图3A，AAS天线阵列例如为一个2×2的天线阵列(如图中
Figure PCTCN2018071834-appb-000001
的所示)，在水平维度和垂直维度均可进行波束赋形。垂直维度波束赋形中，AAS天线阵列可在垂直维 度形成不同的波束(beam)。基站配置的N个第一参考信号资源的索引依次为1～5，该5个第一参考信号资源如图中依次用斜线、方格、横线、竖线和点填充的1～5所示。每个参考信号资源对应一个资源端口(port)，不同的第一参考信号资源对应不同指向的波束，不同的波束具有不同的波束标识(Beam ID)。也就是说，每个第一参考信号资源指示信息指示的索引，与唯一的Beam ID对应。第一反馈模式下，所述UE根据所述N个第一参考信号资源确定所述最近一次上报的RI，并根据所述最近一次上报的RI查询对应关系表以确定所述M个第一参考信号资源指示信息，所述对应关系表存储RI与M之间存在对应关系。例如，RI为1～2，则M为2，RI为3～4，M为4。
第一反馈模式下，假设M个第一参考信号资源指示信息为M个索引对应的M个波束标识(Beam ID)，UE在确定M个第一参考信号资源指示信息之前，最近一次上报的CSI为RI，如图中“①RI”所示，则UE根据“①RI”，确定“②Beam ID”，该“②Beam ID”为索引1和索引3分别对应的波束的波束标识。若UE确定“②Beam ID”之后，最近一次上报的CSI为RI一直未发生变化，在确定“⑤Beam ID”时，依旧根据“①RI”确定“⑤Beam ID”。然而，若UE基于CSI中的PMI和/或CQI确定M个参考信号资源指示信息，则UE在确定“⑤Beam ID”时，是基于“④PMI/CQI”确定出的。
进一步的，第一反馈模式下，所述UE所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上报的RI确定所述第一M个参考信号资源指示信息之后，还可以根据关联关系，确定M个第二参考信号资源，据所述最近一次上报的RI和所述M个第二参考信号资源，确定所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，然后，UE向所述基站上报所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。其中，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系。
具体的，再请参照图3A，以确定PMI/CQI为例，UE根据“①RI”确定出“②Beam ID”之后，根据“②Beam ID”和关联关系，确定M个第二参考信号资源，该M个第二参考信号资源图中未示出，并根据M个第二参考信号资源确定所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，然后向基站上报。举例来说，N个第一参考信号资源中的每个第一参考信号资源包括2个端口，该连个端口对应的波束方向相同，该N个第一参考信号资源分别对应波束B1～B10，该N个第一参考信号资源分别对应的索引(Index)依次为Index1～Index10，M个第一参考信号资源为索引为Index1和Index3的第一参考信号资源。关联关系指示第一参考信号资源与第二参考信号资源分别属于不同的参考信号资源集合，且第一参考信号资源与第二参考信号资源的索引具有对应关系，例如，第一参考信号资源的索引与第二参考信号资源的索引相同，或第二参考信号资源的索引为对第一参考信号资源的索引偏移一个值得到。
以第一参考信号资源的索引与第二参考信号资源的索引相同为例，假设第二参考信号资源有10个，分别对应波束B1～B10，索引依次为Index1’～Index10’，每个第二参考信号资源具有8个端口。则UE最近一次上报的RI，确定出M个第一参考信号资源为索引为 Index1和Index3的第一参考信号资源后，根据关联关系，确定出M个第二参考信号资源分别为索引为Index1’和Index3’的第二参考信号资源，基于索引为Index1’和Index3’的第二参考信号资源，确定PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。
再请参照图3A，RI的反馈周期为第一反馈周期，第一参考信号资源指示信息(即)Beam ID)的反馈周期为第二反馈周期，PMI/CQI的反馈周期为第三反馈周期，所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
其次，第二反馈模式。
第二反馈模式下，UE根据所述N个第一参考信号资源确定M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息确定所述CSI，该CSI例如为RI、PMI、CQI或信道协方差矩阵以及信道特征向量等。下面，以UE根据所述N个第一参考信号资源确定M个第一参考信号资源指示信息，并基于M个第一参考信号资源指示信息确定RI为例，对第二反馈模式进行详细说明。具体的，可参见图3B，图3B为本申请信道状态信息反馈方法实施例二的另一个示意图。
请参照图3B，AAS天线阵列例如为一个2×2的天线阵列(如图中
Figure PCTCN2018071834-appb-000002
的所示)，在水平维度和垂直维度均可进行波束赋形。垂直维度波束赋形中，AAS天线阵列可在垂直维度形成不同的波束(beam)。UE最近一次上报了3个第一参考信号资源指示信息，该3个第一参考信号资源指示信息指示索引依次为1～3的参考信号资源，该3个第一参考信号资源如图中斜线、方格、横线填充的1～3所示。每个第一参考信号资源对应一个资源端口(port)，不同的第一参考信号资源对应不同指向的波束，不同的波束具有不同的波束标识(Beam ID)。也就是说，每个第一参考信号资源指示信息指示的索引，与唯一的Beam ID对应。
第二反馈模式下，假设CSI具体为RI，UE在确定RI之前，最近一次上报的M个第一参考信号资源指示信息为“①Beam ID”，“①Beam ID”为索引3端口对应的波束的波束标识，则UE根据“①Beam ID”，确定“②RI”。若UE确定“②RI”之后，UE上报的Beam ID一直未发生变化，则UE在确定“⑤RI”时，仍然基于“①Beam ID”确定“⑤RI”。
进一步的，第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI中的RI之后，还可以根据根据关联关系，确定M个第二参考信号资源，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系；所述UE根据所述M个第二参考信号资源以及所述RI，确定所述CSI中的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。具体的，可参见上述图3A的描述，此处不再赘述。
再请参照图3B，M个参考信号资源指示信息，即Beam ID的反馈周期为第四反馈周 期，RI的反馈周期为第五反馈周期，PMI/CQI的反馈周期为第六反馈周期，所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
下面，用两个具体的场景对上述的信道状态信息反馈方法进行详细说明。具体的，可参见图4A和图4B，图4A为本申请信道状态信息反馈方法中参考信号资源发送方式的一个示意图，图4B为本申请信道状态信息反馈方法中参考信号资源发送方式的另一个示意图。
场景一
请参照图4A。
UE测量基站发送的N个参考信号资源，由N个端口发送。一个参考信号资源是一个端口上发送的参考信号。其中，有N/2个参考信号资源由第一极化方向的N/2天线端口发送，另外N/2个参考信号资源由第二极化方向的N/2天线端口发送。每一个端口的参考信号经过了一个预编码矩阵进行预编码，一个预编码矩阵对应一个波束。因此，可以认为每个端口的参考信号是由一个对应的波束发送出去的。如图4所示，基站发送N＝8个参考信号资源，其中N/2＝4个参考信号资源由第一极化方向的端口发送，N/2＝4个参考信号资源由第二极化方向的端口发送。预编码向量的形式可以有多种，例如离散傅里叶变换(Discrete Fourier Transform，DFT)向量。基站确定N个参考信号(如CSI-RS)s1,…sm，其中，这N个CSI-RS可以是预定义好的，是基站与终端设备已知的。基站将N个预编码矩阵分别乘以N个参考信号，得到N个预编码后的参考信号：s1’＝u1×s1,…,sN’＝uN×sN，其中ui(i＝1,,,.N)是第i个端口的预编码矩阵。
可选的，UE通过测量参考信号，可以自行选择反馈模式并将反馈模式上报给基站。可选的，基站可以通过高层信令(RRC)或者动态信令(DCI)通知UE应该使用的反馈模式。UE测量参考信号，根据选择的反馈模式或者基站配置的反馈模式，确定自己的一套信道状态信息CSI。一套CSI包括反馈模式包括以下元素的至少一个：秩指示RI、预编码矩阵指示PMI和信道质量指示CQI。其中，PMI可以是一个宽带PMI，也可以是多个子带PMI。
反馈模式包括第一反馈模式和第二反馈模式。其中，在第一反馈模式下，所述UE首先根据N个参考信号的测量确定CSI中的至少一个元素，并基于该CSI中的至少一个元素确定M个参考信号资源指示信息。M是小于等N的正整数。M个参考信号资源指示信息中，每一个参考信号资源指示用于指示一个参考信号资源的索引，和或指示该参考信号资源的质量信息，如接收功率(RSRP)、接收质量(RSRQ)等。在第二反馈模式下，UE根据N个参考信号的测量确定M个参考信号资源指示信息，并基于这M个参考信号资源指示信息确定CSI每个元素。
UE确定反馈模式的方式有多种。例如，UE可以根据测量N个端口的参考信号获得N个端口的参考信号的接收功率。当UE判断每个极化方向的N/2个参考信号中，接收功率超过预定门限的参考信号个数均超过1个，UE可以确定采用第一反馈模式上报CSI。反之，若判断每个极化方向的N/2个参考信号中，接收功率超过预定门限的参考信号个数均只有1个，则UE可以确定采用第二反馈模式上报CSI。UE还可以采用其他方式确定反馈模式，在此不做排除。
若采用第一反馈模式，则UE首先根据测量参考信号的结果确定上报RI。RI代表UE指示基站在后续数据传输过程中，在同一个时频资源传输的数据层数。在确定RI后，UE基于RI上报M个参考信号资源的指示，每一个参考信号资源的指示用于指示一个参考信号资源的编号和或该参考信号资源的质量信息。上报M个指示的方法可以是上报波束编号，或者是端口编号等。UE上报M个参考信号资源指示的时刻可以与上报上述RI的时刻不同。当上报M个参考信号资源指示的时刻迟于上报上述RI的时刻时，上报M个参考信号资源指示所基于的RI是本上报时刻之前，最近一次上报的RI。可选的，M的取值可以是基站配置给UE的，也可以是UE推荐给基站的。可选的，M的取值与RI具有关联关系。具体的关联关系可以是预定义的，例如通过预定义一个表格，基站通过查询表格配置M的取值。例如，M的取值随着RI的增加而不会减少。可选的，M与RI的关联表格可以是类似于如下表格的形式：
RI M
1-2 2
3-4 4
5-6 6
…… ……
基站根据UE上报的RI，即可配置给UE相应的M取值。具体的关联关系还可以是其他方式，在此不排除。
基于上报的RI和M个参考信号资源指示，UE进一步上报PMI和CQI中的至少一个。这里上报的PMI是针对M个第一参考信号资源的测量合成一个目标PMI，可以包含一个(宽带)PMI或者是多个(子带)PMI。CQI是根据RI、M个参考信号资源指示以及PMI所计算的。其中，PMI用于指示在每个极化方向的端口中，所选择的端口的编号。在第一种方式下，针对RI层数据中的每一层数据，每个PMI在每个极化方向的端口中只选择一个端口；在第二种方式下，针对RI层数据中的每一层数据，每个PMI在每个极化方向的端口中选择至少两个端口，则PMI中包括所选择的端口编号以及这些端口之间的线性组合系数。UE上报上述PMI和CQI可以与上报M个参考信号资源指示的时刻不同。当上报PMI和CQI的时刻迟于上报M个参考信号资源指示的时刻时，上报PMI和CQI所基于的M个参考信号资源指示是本上报时刻之前，最近一次上报的M个参考信号资源指示。
因此，在第一反馈模式下，令RI的反馈周期为第一反馈周期，M个参考信号资源指示的反馈周期为第二反馈周期，PMI和CQI的反馈周期为第三反馈周期，则所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。第一反馈模式的示意图如3A所示。
若选择第二上报模式，则UE首先根据测量参考信号的结果上报M个参考信号资源的指示，每一个参考信号资源的指示用于指示一个参考信号资源的编号和或该参考信号资源的质量信息。上报M个指示的方法可以是上报波束编号，或者是端口编号等。UE根据上报的M个参考信号资源的指示，进而确定RI。UE上报M个参考信号资源指示的时刻 可以与上报上述RI的时刻不同。当上报上述RI的时刻迟于上报M个参考信号资源指示的时刻时，上报RI所基于的M个参考信号资源指示是本上报时刻之前，最近一次上报的M个参考信号资源指示。
基于上报的M个参考信号资源指示和RI，UE进一步上报PMI和CQI中的至少一个。这里上报的PMI是针对M个第一参考信号资源的测量合成一个目标PMI，可以包括一个(宽带)PMI或者是多个(子带)PMI。CQI是根据RI、M个参考信号资源指示以及PMI所计算的。其中，PMI用于指示在每个极化方向的端口中，所选择的端口的编号。在第一种方式下，针对RI层数据中的每一层数据，每个PMI在每个极化方向的端口中只选择一个端口；在第二种方式下，针对RI层数据中的每一层数据，每个PMI在每个极化方向的端口中选择至少两个端口，则PMI中包括所选择的端口编号以及这些端口之间的线性组合系数。UE上报上述PMI和CQI的时刻可以与上报RI的时刻不同。当上报PMI和CQI的时刻迟于上报RI的时刻时，上报PMI和CQI所基于的RI是本上报时刻之前，最近一次上报的RI。
因此，在第二人反馈模式下，令M个参考信号资源指示的反馈周期为第四反馈周期，RI的反馈周期为第五反馈周期，PMI和CQI的反馈周期为第六反馈周期，则所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。第一反馈模式的示意图3B所示。
对于上述第一反馈模式和第二反馈模式，PMI的第二种上报方式的好处在于，可以提高CSI反馈精度，提高后续数据传输的性能。以第一反馈模式和RI＝1为例，进行说明，如何计算选择的多个端口的线性组合系数来上报PMI。
UE通过测量N＝8个参考信号，针对第一极化方向的N/2＝4个参考信号(参考信号资源指示分别为1至4)选择了1号和2号参考信号，针对第二极化方向的N/2＝4个参考信号(参考信号资源指示分别为5至8)选择了5号和6号参考信号。则基于这四个参考信号UE可以估计某一个子带的信道系数：
X＝[H×u 1,H×u 2,G×u 1,..G×u 2]
其中，H是第一极化方向的端口对应的天线到UE的信道系数，G是第二极化方向的端口的对应的天线到UE的信道系数。根据RI＝1，UE通过对信道系数X做奇异值分解或通过其他方法，可以求得X的右主奇异值向量x＝[v 1,v 2,u 1,…,u 2]。则参考信号资源指示1、2、5和6以及每个子带的系数[v 1,v 2,u 1,…,u 2]即为UE上报的PMI。信道系数X是基于所选择的M个参考信号资源测量得到的M套CSI，上报的PMI[v 1,v 2,u 1,…,u 2]是基于这M套CSI获得的目标PMI。
场景二
请参照图4B。
UE测量基站发送的N个第一参考信号资源。每个第一参考信号资源由n个端口发送，同一个第一参考信号资源的n个端口用相同的预编码矩阵对端口上的测量参考信号进行预编码，即同一个第一参考信号资源的n个端口的波束方向相同，该波束方向就是该第一参考信号的波束方向。如上图所示，基站N＝2个第一参考信号资源，每个第一参考信号资源由n＝4个端口发送，u1是第一个第一参考信号资源的预编码向量，u2是第二个第一参考 信号资源的预编码向量。
可选的，UE通过测量参考信号，可以自行选择反馈模式并将反馈模式上报给基站。可选的，基站可以通过高层信令(Radio resource control,RRC)或者动态信令(Downlink control informtion,DCI)通知UE应该使用的反馈模式。UE测量参考信号，根据选择的反馈模式或者基站配置的反馈模式，确定自己的一套信道状态信息CSI。一套CSI包括反馈模式包括以下元素的至少一个：秩指示RI、预编码矩阵指示PMI和信道质量指示CQI、信道协方差矩阵以及信道特征向量。其中，PMI可以是一个宽带PMI，也可以是多个子带PMI，信道协方差矩阵可以是一个宽带信道协方差矩阵，也可以是多个子带信道协方差矩阵，信道特征向量可以是一个宽带信道特征向量，也可以是多个子带信道特征向量。
反馈模式包括第一反馈模式和第二反馈模式。其中，在第一反馈模式下，所述UE首先根据N个第一参考信号资源的测量确定CSI中的至少一个元素，并基于该CSI中的至少一个元素确定M个参考信号资源指示信息。M是小于等N的正整数。M个参考信号资源指示信息中，每一个参考信号资源指示用于指示一个第一参考信号资源的索引，和或指示该第一参考信号资源的质量信息，如接收功率(RSRP)、接收质量(RSRQ)等。在第二反馈模式下，UE根据N个第一参考信号资源的测量确定M个参考信号资源指示信息，并基于这M个参考信号资源指示信息确定CSI每个元素。
UE确定反馈模式的方式有多种。例如，UE可以根据测量N个第一参考信号资源的接收功率。当UE判断接收功率超过预定门限的第一参考信号资源大于1个，UE可以确定采用第一反馈模式上报CSI。当UE判断接收功率超过预定门限的第一参考信号资源只有1个，UE可以确定采用第二反馈模式上报CSI。UE还可以采用其他方式确定反馈模式，在此不做排除。
若采用第一反馈模式，则UE首先根据测量第一参考信号的结果确定上报RI。RI代表UE指示基站在后续数据传输过程中，在同一个时频资源传输的数据层数。在确定RI后，UE基于RI上报M个参考信号资源的指示，每一个参考信号资源的指示用于指示一个第一参考信号资源的编号和或该第一参考信号资源的质量信息。UE上报M个参考信号资源指示的时刻可以与上报上述RI的时刻不同。当上报M个参考信号资源指示的时刻迟于上报上述RI的时刻时，上报M个参考信号资源指示所基于的RI是本上报时刻之前，最近一次上报的RI。
可选的，M的取值可以是基站配置给UE的，也可以是UE推荐给基站的。可选的，RI与M和n的取值有关系。一个例子中，如果RI是小于等于n的整数，则M的取值可是大于等于1的整数。一个例子中，如果RI是大于等于n的整数，则M的取值是大于1的整数。例如，n＝2，RI＝3，则基站配置的M可以是大于等于RI/n＝1.5的正整数，即M可以是大于等于2的整数。具体的关联关系可以通过一个表格表示，基站或UE通过查询表格即可确定M。
基于上报的RI和M个参考信号资源指示，UE进一步上报PMI、CQI、信道协方差矩阵以及信道特征向量中的至少一个。可选的，PMI可以用于指示UE所选择的预编码矩阵。可选的，上报的PMI指示的预编码矩阵包括M×n列，该预编码矩阵用于对上报的M个参考信号资源指示指示的M个第一参考信号资源的共M×n个端口进行预编码，即针对M 个第一参考信号资源的测量合成一个目标PMI。可选的，该目标PMI可以是基于测量M个参考信号资源获得的M个CSI合成获得的。可选的，该目标PMI可以针对整个带宽上报一个，或者针对每个子带上报一个。可选的，上报的信道协方差矩阵可以包括M个协方差矩阵，其中的每一个协方差矩阵是上述M个参考信号资源中的一个参考信号资源的n个端口到UE的信道的协方差矩阵。或者，上报的信道协方差矩阵包括一个协方差矩阵，是上述M个参考信号资源的M×n个端口到UE的信道的协方差矩阵，即针对M个第一参考信号资源的测量合成一个目标协方差矩阵。该目标协方差矩阵可以针对整个带宽上报一个，或者针对每个子带上报一个。类似的，上报的信道特征向量可以包括M个信道特征向量，其中的每一个信道特征向量是上述M个参考信号资源中的一个参考信号资源的n个端口到UE的信道的信道特征向量。或者，上报的信道特征向量包括一个信道特征向量，是上述M个参考信号资源的M×n个端口到UE的信道的信道特征向量，即针对M个第一参考信号资源的测量合成一个目标信道特征向量。该目标信道特征向量可以针对整个带宽上报一个，或者针对每个子带上报一个。CQI基于上报的M个参考信号资源指示、RI和PMI计算，或基于上报的M个参考信号资源指示、RI、信道协方差矩阵或信道特征向量计算。
UE上报上述PMI、CQI、信道协方差矩阵和信道特征向量的时刻可以与上报上述M个参考信号资源指示的时刻不同。当上报PMI、CQI信道协方差矩阵和信道特征向量的时刻迟于上报M个参考信号资源指示的时刻时，上报PMI、CQI信道协方差矩阵和信道特征向量所基于的M个参考信号资源指示是本上报时刻之前，最近一次上报的M个参考信号资源指示。
可选的，在上述一个目标PMI还可以用于上报所选择的M个参考信号资源的共M×n个端口的一套线性组合系数。该一套组合系数可以是基于测量M个参考信号资源获得的M个CSI合成得到的。以M＝2，n＝2，RI＝1为例说明线性组合系数的一种求解方法。UE测量N个参考信号资源，选择了1号和2号参考信号资源。其中，1号参考信号资源的2个端口到UE的下行信道的信道矩阵为H，2号参考信号资源的2个端口到UE的下行信道的信道矩阵为G。H和M的维度均为M×2，其中M为UE的天线数。UE分别对H和G的信道矩阵进行奇异值分解得到H的主特征向量v1，以及G的主特征向量v2，其中v1和v2均是维度为2×1的向量。基于v1和v2，UE可以首先计算两组端口的等效信道H_eff和G_eff，其中，H_eff＝H×v1,G_eff＝G×v2，并对合成信道F＝[H_eff G_eff]进行奇异值分解或其它计算，得到主特征向量u，其中u＝(u1,u2)，是维度为2×1的向量，由u1,u2两个复数组成。其次，UE根据1号和2号参考信号资源对应的基向量集合(标准中预定义的或者基站配置的)和上述求得的主特征向量(v1,v2)，确定1号参考信号资源的n＝2个端口的线性组合系数(a1,a2)，确定1号参考信号资源的n＝2个端口的线性组合系数(b1,b2)。则上报的目标PMI包括如下一套组合系数(u1,u2,a1,a2,b1,b2)。其中，(a1,a2，b1,b2)是针对2个参考信号资源的测量获得的M＝2套CSI，系数(u1,u2)是在这M＝2套CSI的技术上进一步获得的。因此，上报的一套组合系数(u1,u2,a1,a2,b1,b2)是基于套CSI合成得到的PMI。该组合系数可以针对整个带宽上报一套，也可以针对每个子带上报一套。组合系数还可以通过其他方式求解，在此不作排除。
因此，在第一反馈模式下，令RI的反馈周期为第一反馈周期，M个参考信号资源指示的反馈周期为第二反馈周期，PMI、CQI、信道协方差矩阵和信道特征向量的反馈周期为第三反馈周期，则所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
若采用第二上报模式，则UE首先根据测量参考信号的结果上报M个参考信号资源的指示，每一个参考信号资源的指示用于指示一个参考信号资源的编号和或该参考信号资源的质量信息。UE根据上报的M个参考信号资源的指示，进而确定RI。UE上报M个参考信号资源指示的时刻可以与上报上述RI的时刻不同。当上报上述RI的时刻迟于上报M个参考信号资源指示的时刻时，上报RI所基于的M个参考信号资源指示是本上报时刻之前，最近一次上报的M个参考信号资源指示。
基于上报的M个参考信号资源指示和RI，UE进一步上报PMI、CQI、信道协方差矩阵以及信道特征向量中的至少一个。可选的，上报的PMI指示的预编码矩阵包括M×n列，该预编码矩阵用于对上报的M个参考信号资源指示指示的M个第一参考信号资源的共M×n个端口进行预编码，即针对M个第一参考信号资源的测量合成一个目标PMI。该目标PMI可以针对整个带宽上报一个，或者针对每个子带上报一个。可选的，上报的信道协方差矩阵可以包括M个协方差矩阵，其中的每一个协方差矩阵是上述M个参考信号资源中的一个参考信号资源的n个端口到UE的信道的协方差矩阵。或者，上报的信道协方差矩阵包括一个协方差矩阵，是上述M个参考信号资源的M×n个端口到UE的信道的协方差矩阵，即针对M个第一参考信号资源的测量合成一个目标协方差矩阵。该目标协方差矩阵可以针对整个带宽上报一个，或者针对每个子带上报一个。类似的，上报的信道特征向量可以包括M个信道特征向量，其中的每一个信道特征向量是上述M个参考信号资源中的一个参考信号资源的n个端口到UE的信道的信道特征向量。或者，上报的信道特征向量包括一个信道特征向量，是上述M个参考信号资源的M×n个端口到UE的信道的信道特征向量，即针对M个第一参考信号资源的测量合成一个目标信道特征向量。该目标信道特征向量可以针对整个带宽上报一个，或者针对每个子带上报一个。CQI基于上报的M个参考信号资源指示、RI和PMI计算，或基于上报的M个参考信号资源指示、RI、信道协方差矩阵或信道特征向量计算。UE上报上述PMI、CQI、信道协方差矩阵以及信道特征向量的时刻可以与上报RI的时刻不同。当上报PMI、CQI、信道协方差矩阵以及信道特征向量的时刻迟于上报RI的时刻时，上报PMI、CQI、信道协方差矩阵以及信道特征向量所基于的RI是本上报时刻之前，最近一次上报的RI。
因此，在第二反馈模式下，令M个参考信号资源指示的反馈周期为第四反馈周期，RI的反馈周期为第五反馈周期，PMI和CQI的反馈周期为第六反馈周期，则所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
可选的，在上述PMI还可以用于上报所选择的M个参考信号资源的共M×n个端口的一套线性组合系数。具体的求解方式与第一反馈方式中的组合系数求解方式类似，不再赘述。
可选的，在第二反馈模式下，UE上报的PMI、CQI、信道协方差矩阵以及信道特征向 量可以基于N个第二测量参考资源的测量获得。其中，N个第一测量参考资源与N个第二参考信号资源具有关联关系，例如第i个第二参考信号资源的波束方向与第i个第一参考信号资源的波束方向相近，并且第i个第二参考信号资源的端口包含第i个第一参考信号资源的端口。或者第i个第二参考信号资源的波束方向与第i个第一参考信号资源的波束方向相近，并且第i个第二参考信号资源的波束的宽度可以比第i个第一参考信号资源的波束的宽度更窄。或者，第i个第二参考信号资源对应一组波束，这一组波束的方向与相关联的第i个第一参考信号资源的波束相近。具体的关联关系还可以是其他形式，在此不作排除。基于这种关联关系，基站可以基于UE上报的M个参考信号资源指示，配置相应的第二参考信号资源。UE则可以根据这种关联关系，测量相应的第二参考信号资源。具体的，可参见图5A与图5B，图5A为本申请信道状态信息反馈方法中的一个第一参考信号资源和第二参考信号资源的关联关系示意图。图5B为本申请信道状态信息反馈方法中的一个第一参考信号资源和第二参考信号资源的另一个关联关系示意图。
请参照图5A，N＝4个第一参考信号资源的每一个第一参考信号资源包括2个端口，并且分别对应不同的波束方向。每一个第一参考信号资源关联一个第二参考信号资源。每一个第二参考信号资源有4个端口，分别对应一个波束方向。其中，每一个第二参考信号资源对应的波束方向与相关联的第一参考信号资源的波束方向基本一致。
请参照图5B，N＝4个第一参考信号资源的每一个第一参考信号资源包括2个端口，并且分别对应不同的波束方向。每一个第一参考信号资源关联一个第二参考信号资源。每一个第二参考信号资源有2个端口，分别对应一组波束，每组波束包含两个波束。其中，每一个第二参考信号资源对应的波束组两个波束的方向与相关联的第一参考信号资源的波束方向基本一致。
图6为本申请用户设备实施例一的结构示意图。本实施例提供的用户设备可实现本申请任意实施例提供的应用于用户设备的方法的各个步骤。具体的，本实施例提供的用户设备100包括：
接收模块11，用于接收基站配置的N个第一参考信号资源，所述N个第一参考信号资源中的各所述第一参考信号资源包括至少一个端口，N≥2，且为整数；
处理模块12，用于根据反馈模式确定信道状态指示CSI和M个第一参考信号资源指示信息，所述反馈模式指示所述CSI中的各个元素、所述M个第一参考信号资源指示信息的确定顺序，所述CSI包括以下元素的至少一个：秩指示RI、预编码矩阵指示PMI、信道质量指示CQI、信道协方差矩阵或信道特征向量；
发送模块13，用于向所述基站上报所述CSI和M个第一参考信号资源指示信息；
其中，所述M个第一参考信号资源指示信息指示M个第一参考信号资源中，每个第一参考信号资源的索引和/或质量信息，所述M个第一参考信号资源为所述N个第一参考信号资源中的M个第一参考信号资源，M≤N，且为整数。
本申请提供的用户设备，在接收到基站配置的N个第一参考信号资源后，根据反馈模式确定该些第一参考信号资源的CSI以及M个第一参考信号指示信息后，向基站反馈CSI和M个第一参考信号资源指示信息。该过程中，UE将该M个第一参考信号资源的水平维度的CSI与该M个第一参考信号资源指示信息反馈给基站，使得基站根据第一参考信号资源指示信息确定出垂直维度的信道状态信息，从而最终获得两个维度的信道状态信息，解 决传统信道估计中，仅反馈水平维度信道状态信息的弊端。
可选的，在本申请一实施例中，所述反馈模式包括第一反馈模式；
所述处理模块12，具体用于在所述第一反馈模式下，根据所述N个第一参考信号资源确定所述CSI中的至少一个元素，并基于所述CSI中的至少一个元素确定所述M个第一参考信号资源指示信息。
可选的，在本申请一实施例中，所述CSI中的至少一个元素为所述UE在确定所述M个第一参考信号资源指示信息之前、最近一次上报的RI，所述处理模块12，具体用于在所述第一反馈模式下，根据所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上报的RI确定所述M个第一参考信号资源指示信息。
可选的，在本申请一实施例中，所述处理模块12，还用于根据关联关系，确定M个第二参考信号资源，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系；根据所述最近一次上报的RI和所述M个第二参考信号资源，确定所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
所述发送模块13，还用于向所述基站上报所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。
可选的，在本申请一实施例中，所述RI的反馈周期为第一反馈周期，所述M个第一参考信号资源指示信息的反馈周期为第二反馈周期，所述PMI和CQI的反馈周期为第三反馈周期，所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
可选的，在本申请一实施例中，所述处理模块12，在根据所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上报的RI确定所述M个第一参考信号资源指示信息时，具体用于在所述第一反馈模式下，根据所述N个第一参考信号资源确定所述最近一次上报的RI，并根据所述最近一次上报的RI查询对应关系表以确定所述M个第一参考信号资源指示信息，所述对应关系表存储RI与M之间存在对应关系。
可选的，在本申请一实施例中，所述反馈模式包括第二反馈模式；所述处理模块12，具体用于在第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI。
可选的，在本申请一实施例中，所述M个第一参考信号资源指示信息为所述UE在确定所述CSI之前、最近一次上报的M个第一参考信号资源指示信息。
可选的，在本申请一实施例中，所述处理模块12，具体用于在所述第二反馈模式下，根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI中的RI。
可选的，在本申请一实施例中，所述处理模块12，在所述第二反馈模式下，根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI中的RI之后，还用于根据关联关系，确定M个第二参考信号资源，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系；根据所述M个第二参考信号资源以及所述RI，确定所述CSI中的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
所述发送模块13，还用于向所述基站上报所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。
可选的，在本申请一实施例中，所述M个第一参考信号资源指示信息的反馈周期为第四反馈周期，所述CSI中的RI的反馈周期为第五反馈周期，所述CSI中的PMI和CQI的反馈周期为第六反馈周期，所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
可选的，在本申请一实施例中，所述处理模块12，还用于根据所述最近一次上报的RI和所述M个第二参考信号资源，确定M套CSI，所述M套CSI中每一套CSI包括PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；将所述M套CSI合成目的CSI，所述目的CSI包括目的PMI、目的CQI、目的信道协方差矩阵或目的信道特征向量中的至少一个；
所述发送模块13，具体用于向所述基站上报所述目的PMI的基向量、端口索引或合成系数，以使得所述基站根据所述目的PMI的基向量、端口索引或合成系数确定出所述目的PMI，并根据所述目的PMI获得所述目的CQI。
可选的，在本申请一实施例中，所述接收模块11，还用于接收所述基站通过高层信令或动态信令配置的所述反馈模式。
可选的，在本申请一实施例中，所述发送模块13，还用于向所述基站反馈所述反馈模式。
图7为本申请基站实施例一的结构示意图。本实施例提供的基站可实现本申请任意实施例提供的应用于基站的方法的各个步骤。具体的，本实施例提供的基站200包括：
处理模块21，用于配置N个第一参考信号资源，所述N个第一参考信号资源中的各所述第一参考信号资源包括至少一个端口，N≥2，且为整数；
发送模块22，用于向用户设备UE发送所述N个第一参考信号资源；
接收模块23，用于接收所述UE根据反馈模式上报的信道状态指示CSI和M个第一参考信号资源指示信息，所述反馈模式指示所述CSI中的各个元素、所述M个第一参考信号资源指示信息的确定顺序，所述CSI包括以下元素的至少一个：秩指示RI、预编码矩阵指示PMI、信道质量指示CQI、信道协方差矩阵或信道特征向量；
其中，所述M个第一参考信号资源指示信息指示M个第一参考信号资源中，每个第一参考信号资源的索引和/或质量信息，所述M个第一参考信号资源为所述N个第一参考信号资源中的M个第一参考信号资源，M≤N，且为整数。
本申请提供的基站，为UE配置N个第一参考信号资源并发送给UE，UE在接收到该些第一参考信号资源后，根据反馈模式确定该些第一参考信号资源的CSI以及M个第一参考信号指示信息后，向基站反馈CSI和M个第一参考信号资源指示信息。该过程中，UE将该M个第一参考信号资源的水平维度的CSI与该M个第一参考信号资源指示信息反馈给基站，使得基站根据第一参考信号资源指示信息确定出垂直维度的信道状态信息，从而最终获得两个维度的信道状态信息，解决传统信道估计中，仅反馈水平维度信道状态信息的弊端。
可选的，在本申请一实施例中，所述反馈模式包括第一反馈模式；
所述接收模块23，具体用于在所述第一反馈模式下，接收所述UE基于所述CSI中的 至少一个元素确定的所述M个第一参考信号资源指示信息，所述CSI中的至少一个元素为所述UE根据所述N个第一参考信号资源确定的。
可选的，在本申请一实施例中，所述CSI中的至少一个元素为所述UE在确定所述M个第一参考信号资源指示信息之前、最近一次上报的RI，所述接收模块23，具体用于在所述第一反馈模式下，接收所述UE根据所述最近一次上报的RI确定出的所述M个第一参考信号资源指示信息，所述最近一次上报的RI为所述UE根据所述N个第一参考信号资源确定的。
可选的，在本申请一实施例中，所述接收模块23，在所述第一反馈模式下，接收所述UE根据所述最近一次上报的RI确定出的所述M个第一参考信号资源指示信息之后，还用于接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个为所述UE根据所述最近一次上报的RI和M个第二参考信号资源确定出的，所述M个第二参考信号资源为所述根据关联关系确定出的，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系。
可选的，在本申请一实施例中，所述RI的反馈周期为第一反馈周期，所述M个第一参考信号资源指示信息的反馈周期为第二反馈周期，所述PMI和CQI的反馈周期为第三反馈周期，所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
可选的，在本申请一实施例中，所述M个第一参考信号资源指示信息为所述UE根据所述N个第一参考信号资源确定出所述最近一次上报的RI，并根据所述最近一次上报的RI查询对应关系表确定出的，所述对应关系表存储RI与M之间存在对应关系。
可选的，在本申请一实施例中，所述反馈模式包括第二反馈模式；
所述接收模块23，具体用于在所述第二反馈模式下接收所述UE基于所述M个第一参考信号资源指示信息确定出的所述CSI，所述M个第一参考信号资源指示信息为所述UE根据所述N个第一参考信号资源确定出的。
可选的，在本申请一实施例中，所述M个第一参考信号资源指示信息为所述UE在确定所述CSI之前、最近一次上报的M个第一参考信号资源指示信息。
可选的，在本申请一实施例中，
所述接收模块23，具体用于在所述第二反馈模式下，接收所述UE根据所述M个第一参考信号资源确定出的RI。
可选的，在本申请一实施例中，所述接收模块23，在接收所述UE根据所述M个第一参考信号资源确定出的RI之后，还用于接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个为所述UE根据M个第二参考信号资源确定出的，所述M个第二参考信号资源为所述UE根据关联关系确定出，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系。
可选的，在本申请一实施例中，所述M个第一参考信号资源指示信息的反馈周期为第四反馈周期，所述CSI中的RI的反馈周期为第五反馈周期，所述CSI中的PMI和CQI的反馈周期为第六反馈周期，所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反 馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
可选的，在本申请一实施例中，所述接收模块23，具体用于接收所述UE上报的目的目的CSI，所述目的CSI包括目的PMI、目的CQI、目的信道协方差矩阵或目的信道特征向量中的至少一个；所述目的CSI为所述UE对M套CSI合成得到的，所述M套CSI为所述UE根据所述最近一次上报的RI和所述M个第二参考信号资源确定出的。
可选的，在本申请一实施例中，所述发送模块22，还用于向所述UE发送高层信令或动态信息，所述高层信令或动态信令中携带所述反馈模式。
可选的，在本申请一实施例中，所述接收模块23，还用于接收所述UE反馈的所述反馈模式。
图8为本申请用户设备实施例二的结构示意图，本实例提供的用户设备包括：处理器31、存储器32、通信接口33和系统总线34，所述存储器32和所述通信接口33通过所述系统总线34与所述处理器31连接并完成相互间的通信，所述存储器32用于存储计算机执行指令，所述通信接口33用于和其他设备进行通信，所述处理器31用于运行所述计算机执行指令，使所述用户设备执行如上应用于用户设备的方法的各个步骤。
图9为本申请基站实施例二的结构示意图，本实施例提供的基站包括：处理器41、存储器42、通信接口43和系统总线44，所述存储器42和所述通信接口43通过所述系统总线44与所述处理器41连接并完成相互间的通信，所述存储器42用于存储计算机执行指令，所述通信接口43用于和其他设备进行通信，所述处理器41用于运行所述计算机执行指令，使所述基站执行如上应用于基站的方法的各个步骤。
上述图8、图9中提到的系统总线可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。所述系统总线可以分为地址总线、数据总线、控制总线等。为便于表示，图中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。通信接口用于实现数据库访问装置与其他设备(例如客户端、读写库和只读库)之间的通信。存储器可能包含随机存取存储器(random access memory，RAM)，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。
上述的处理器可以是通用处理器，包括中央处理器(Central Processing Unit，CPU)、网络处理器(Network Processor，NP)等；还可以是数字信号处理器(Digital Signal Processing，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现场可编程门阵列(Field－Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。

Claims (60)

  1. 一种信道状态信息反馈方法，其特征在于，包括：
    用户设备UE接收基站配置的N个第一参考信号资源，所述N个第一参考信号资源中的各所述第一参考信号资源包括至少一个端口，N≥2，且为整数；
    所述UE根据反馈模式确定信道状态指示CSI和M个第一参考信号资源指示信息，所述反馈模式指示所述CSI中的各个元素、所述M个第一参考信号资源指示信息的确定顺序，所述CSI包括以下元素的至少一个：秩指示RI、预编码矩阵指示PMI、信道质量指示CQI、信道协方差矩阵或信道特征向量；
    所述UE向所述基站上报所述CSI和M个第一参考信号资源指示信息；
    其中，所述M个第一参考信号资源指示信息指示M个第一参考信号资源中，每个第一参考信号资源的索引和/或质量信息，所述M个第一参考信号资源为所述N个第一参考信号资源中的M个第一参考信号资源，M≤N，且为整数。
  2. 根据权利要求1所述的方法，其特征在于，所述反馈模式包括第一反馈模式；
    所述UE根据反馈模式确定信道状态指示CSI和M个第一参考信号资源指示信息，包括：
    所述第一反馈模式下，所述UE根据所述N个第一参考信号资源确定所述CSI中的至少一个元素，并基于所述CSI中的至少一个元素确定所述M个第一参考信号资源指示信息。
  3. 根据权利要求2所述的方法，其特征在于，所述CSI中的至少一个元素为所述UE在确定所述M个第一参考信号资源指示信息之前、最近一次上报的RI，所述第一反馈模式下，所述UE根据所述N个第一参考信号资源确定所述CSI中的至少一个元素，并基于所述CSI中的至少一个元素确定所述M个第一参考信号资源指示信息，包括：
    所述第一反馈模式下，所述UE根据所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上报的RI确定所述M个第一参考信号资源指示信息。
  4. 根据权利要求3所述的方法，其特征在于，所述第一反馈模式下，所述UE所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上报的RI确定所述M个第一参考信号资源指示信息之后，还包括：
    所述UE根据关联关系，确定M个第二参考信号资源，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系；
    所述UE根据所述最近一次上报的RI和所述M个第二参考信号资源，确定所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
    所述UE向所述基站上报所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。
  5. 根据权利要求4所述方法，其特征在于，所述RI的反馈周期为第一反馈周期，所述M个第一参考信号资源指示信息的反馈周期为第二反馈周期，所述PMI和CQI的反馈周期为第三反馈周期，所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
  6. 根据权利要求3～5任一项所述的方法，其特征在于，所述第一反馈模式下，所述UE根据所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上 报的RI确定所述M个第一参考信号资源指示信息，包括：
    所述第一反馈模式下，所述UE根据所述N个第一参考信号资源确定所述最近一次上报的RI，并根据所述最近一次上报的RI查询对应关系表以确定所述M个第一参考信号资源指示信息，所述对应关系表存储RI与M之间存在对应关系。
  7. 根据权利要求1所述的方法，其特征在于，
    所述反馈模式包括第二反馈模式；
    所述UE根据反馈模式确定信道状态指示CSI和M个第一参考信号资源指示信息，包括：所述第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI。
  8. 根据权利要求7所述的方法，其特征在于，所述M个第一参考信号资源指示信息为所述UE在确定所述CSI之前、最近一次上报的M个第一参考信号资源指示信息。
  9. 根据权利要求8所述的方法，其特征在于，所述第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI，包括：
    所述第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI中的RI。
  10. 根据权利要求9所述的方法，其特征在于，所述第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI中的RI之后，还包括：
    所述UE根据关联关系，确定M个第二参考信号资源，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系；
    所述UE根据所述M个第二参考信号资源以及所述RI，确定所述CSI中的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
    所述UE向所述基站上报所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。
  11. 根据权利要求10所述的方法，其特征在于，所述M个第一参考信号资源指示信息的反馈周期为第四反馈周期，所述CSI中的RI的反馈周期为第五反馈周期，所述CSI中的PMI和CQI的反馈周期为第六反馈周期，所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
  12. 根据权利要求4或10所述的方法，其特征在于，所述UE向所述基站上报所述PMI或CQI中的至少一个，包括：
    所述UE根据所述最近一次上报的RI和所述M个第二参考信号资源，确定M套CSI，所述M套CSI中每一套CSI包括PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
    所述UE将所述M套CSI合成目的CSI，所述目的CSI包括目的PMI、目的CQI、目的信道协方差矩阵或目的信道特征向量中的至少一个；
    所述UE向所述基站上报所述目的PMI的基向量、端口索引或合成系数，以使得所述基站根据所述目的PMI的基向量、端口索引或合成系数确定出所述目的PMI，并根据所述目的PMI获得所述目的CQI。
  13. 根据权利要求1～12任一项所述的方法，其特征在于，还包括：
    所述UE接收所述基站通过高层信令或动态信令配置的所述反馈模式。
  14. 根据权利要求1～12任一项所述的方法，其特征在于，还包括：
    所述UE向所述基站反馈所述反馈模式。
  15. 一种信道状态信息反馈方法，其特征在于，包括：
    基站配置N个第一参考信号资源，所述N个第一参考信号资源中的各所述第一参考信号资源包括至少一个端口，N≥2，且为整数；
    所述基站向用户设备UE发送所述N个第一参考信号资源；
    所述基站接收所述UE根据反馈模式上报的信道状态指示CSI和M个第一参考信号资源指示信息，所述反馈模式指示所述CSI中的各个元素、所述M个第一参考信号资源指示信息的确定顺序，所述CSI包括以下元素的至少一个：秩指示RI、预编码矩阵指示PMI、信道质量指示CQI、信道协方差矩阵或信道特征向量；
    其中，所述M个第一参考信号资源指示信息指示M个第一参考信号资源中，每个第一参考信号资源的索引和/或质量信息，所述M个第一参考信号资源为所述N个第一参考信号资源中的M个第一参考信号资源，M≤N，且为整数。
  16. 根据权利要求15所述的方法，其特征在于，所述反馈模式包括第一反馈模式；所述基站接收所述UE根据反馈模式上报的信道状态指示CSI和M个第一参考信号资源指示信息，包括：
    所述第一反馈模式下，所述基站接收所述UE基于所述CSI中的至少一个元素确定的所述M个第一参考信号资源指示信息，所述CSI中的至少一个元素为所述UE根据所述N个第一参考信号资源确定的。
  17. 根据权利要求16所述的方法，其特征在于，所述CSI中的至少一个元素为所述UE在确定所述M个第一参考信号资源指示信息之前、最近一次上报的RI，所述第一反馈模式下，所述基站接收所述UE基于所述CSI中的至少一个元素确定的所述M个第一参考信号资源指示信息，包括：
    所述第一反馈模式下，所述基站接收所述UE根据所述最近一次上报的RI确定出的所述M个第一参考信号资源指示信息，所述最近一次上报的RI为所述UE根据所述N个第一参考信号资源确定的。
  18. 根据权利要求17所述的方法，其特征在于，所述第一反馈模式下，所述基站接收所述UE根据所述最近一次上报的RI确定出的所述M个第一参考信号资源指示信息之后，还包括：
    所述基站接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个为所述UE根据所述最近一次上报的RI和M个第二参考信号资源确定出的，所述M个第二参考信号资源为所述根据关联关系确定出的，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系。
  19. 根据权利要求18所述的方法，其特征在于，所述RI的反馈周期为第一反馈周期，所述M个第一参考信号资源指示信息的反馈周期为第二反馈周期，所述PMI和CQI的反馈周期为第三反馈周期，所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
  20. 根据权利要求17～19任一项所述的方法，其特征在于，所述M个第一参考信号资源指示信息为所述UE根据所述N个第一参考信号资源确定出所述最近一次上报的RI，并根据所述最近一次上报的RI查询对应关系表确定出的，所述对应关系表存储RI与M之间存在对应关系。
  21. 根据权利要求15所述的方法，其特征在于，
    所述反馈模式包括第二反馈模式；
    所述基站接收所述UE根据反馈模式上报的信道状态指示CSI和M个第一参考信号资源指示信息，包括：
    所述第二反馈模式下，所述基站接收所述UE基于所述M个第一参考信号资源指示信息确定出的所述CSI，所述M个第一参考信号资源指示信息为所述UE根据所述N个第一参考信号资源确定出的。
  22. 根据权利要求21所述的方法，其特征在于，所述M个第一参考信号资源指示信息为所述UE在确定所述CSI之前、最近一次上报的M个第一参考信号资源指示信息。
  23. 根据权利要求22所述的方法，其特征在于，所述第二反馈模式下，所述基站接收所述UE基于所述M个第一参考信号资源指示信息确定出的所述CSI，包括：
    所述基站接收所述UE根据所述M个第一参考信号资源确定出的RI。
  24. 根据权利要求23所述的方法，其特征在于，所述基站接收所述UE根据所述M个第一参考信号资源确定出的RI之后，还包括：
    所述基站接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个为所述UE根据M个第二参考信号资源确定出的，所述M个第二参考信号资源为所述UE根据关联关系确定出，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系。
  25. 根据权利要求24所述的方法，其特征在于，所述M个第一参考信号资源指示信息的反馈周期为第四反馈周期，所述CSI中的RI的反馈周期为第五反馈周期，所述CSI中的PMI和CQI的反馈周期为第六反馈周期，所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
  26. 根据权利要求18或25所述的方法，其特征在于，所述基站接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，包括：
    所述基站接收所述UE上报的目的目的CSI，所述目的CSI包括目的PMI、目的CQI、目的信道协方差矩阵或目的信道特征向量中的至少一个；所述目的CSI为所述UE对M套CSI合成得到的，所述M套CSI为所述UE根据所述最近一次上报的RI和所述M个第二参考信号资源确定出的。
  27. 根据权利要求15～26任一项所述的方法，其特征在于，还包括：
    所述基站向所述UE发送高层信令或动态信息，所述高层信令或动态信令中携带所述 反馈模式。
  28. 根据权利要求15～26任一项所述的方法，其特征在于，还包括：
    所述接着接收所述UE反馈的所述反馈模式。
  29. 一种用户设备，其特征在于，包括：
    接收模块，用于接收基站配置的N个第一参考信号资源，所述N个第一参考信号资源中的各所述第一参考信号资源包括至少一个端口，N≥2，且为整数；
    处理模块，用于根据反馈模式确定信道状态指示CSI和M个第一参考信号资源指示信息，所述反馈模式指示所述CSI中的各个元素、所述M个第一参考信号资源指示信息的确定顺序，所述CSI包括以下元素的至少一个：秩指示RI、预编码矩阵指示PMI、信道质量指示CQI、信道协方差矩阵或信道特征向量；
    发送模块，用于向所述基站上报所述CSI和M个第一参考信号资源指示信息；
    其中，所述M个第一参考信号资源指示信息指示M个第一参考信号资源中，每个第一参考信号资源的索引和/或质量信息，所述M个第一参考信号资源为所述N个第一参考信号资源中的M个第一参考信号资源，M≤N，且为整数。
  30. 根据权利要求29所述的设备，其特征在于，所述反馈模式包括第一反馈模式；
    所述处理模块，具体用于在所述第一反馈模式下，根据所述N个第一参考信号资源确定所述CSI中的至少一个元素，并基于所述CSI中的至少一个元素确定所述M个第一参考信号资源指示信息。
  31. 根据权利要求30所述的设备，其特征在于，所述CSI中的至少一个元素为所述UE在确定所述M个第一参考信号资源指示信息之前、最近一次上报的RI，所述处理模块，具体用于在所述第一反馈模式下，根据所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上报的RI确定所述M个第一参考信号资源指示信息。
  32. 根据权利要求31所述的设备，其特征在于，
    所述处理模块，还用于根据关联关系，确定M个第二参考信号资源，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系；根据所述最近一次上报的RI和所述M个第二参考信号资源，确定所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
    所述发送模块，还用于向所述基站上报所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。
  33. 根据权利要求32所述的设备，其特征在于，所述RI的反馈周期为第一反馈周期，所述M个第一参考信号资源指示信息的反馈周期为第二反馈周期，所述PMI和CQI的反馈周期为第三反馈周期，所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
  34. 根据权利要求31～33任一项所述的设备，其特征在于，所述处理模块，在根据所述N个第一参考信号资源确定所述最近一次上报的RI，并基于所述最近一次上报的RI确定所述M个第一参考信号资源指示信息时，具体用于在所述第一反馈模式下，根据所述N个第一参考信号资源确定所述最近一次上报的RI，并根据所述最近一次上报的RI查询对应关系表以确定所述M个第一参考信号资源指示信息，所述对应关系表存储RI与M之间存在对应关系。
  35. 根据权利要求29所述的设备，其特征在于，
    所述反馈模式包括第二反馈模式；所述处理模块，具体用于在第二反馈模式下，所述UE根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI。
  36. 根据权利要求35所述的设备，其特征在于，
    所述M个第一参考信号资源指示信息为所述UE在确定所述CSI之前、最近一次上报的M个第一参考信号资源指示信息。
  37. 根据权利要求36所述的设备，其特征在于，所述处理模块，具体用于在所述第二反馈模式下，根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI中的RI。
  38. 根据权利要求37所述的设备，其特征在于，
    所述处理模块，在所述第二反馈模式下，根据所述N个第一参考信号资源确定所述M个第一参考信号资源指示信息，并基于所述M个第一参考信号资源指示信息指示的M个第一参考信号资源确定所述CSI中的RI之后，还用于根据关联关系，确定M个第二参考信号资源，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系；根据所述M个第二参考信号资源以及所述RI，确定所述CSI中的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；
    所述发送模块，还用于向所述基站上报所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个。
  39. 根据权利要求38所述的的设备，其特征在于，
    所述M个第一参考信号资源指示信息的反馈周期为第四反馈周期，所述CSI中的RI的反馈周期为第五反馈周期，所述CSI中的PMI和CQI的反馈周期为第六反馈周期，所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
  40. 根据权利要求32或38所述的设备，其特征在于，
    所述处理模块，还用于根据所述最近一次上报的RI和所述M个第二参考信号资源，确定M套CSI，所述M套CSI中每一套CSI包括PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个；将所述M套CSI合成目的CSI，所述目的CSI包括目的PMI、目的CQI、目的信道协方差矩阵或目的信道特征向量中的至少一个；
    所述发送模块，具体用于向所述基站上报所述目的PMI的基向量、端口索引或合成系数，以使得所述基站根据所述目的PMI的基向量、端口索引或合成系数确定出所述目的PMI，并根据所述目的PMI获得所述目的CQI。
  41. 根据权利要求29～40任一项所述的设备，其特征在于，
    所述接收模块，还用于接收所述基站通过高层信令或动态信令配置的所述反馈模式。
  42. 根据权利要求29～40任一项所述的设备，其特征在于，
    所述发送模块，还用于向所述基站反馈所述反馈模式。
  43. 一种基站，其特征在于，包括：
    处理模块，用于配置N个第一参考信号资源，所述N个第一参考信号资源中的各所述 第一参考信号资源包括至少一个端口，N≥2，且为整数；
    发送模块，用于向用户设备UE发送所述N个第一参考信号资源；
    接收模块，用于接收所述UE根据反馈模式上报的信道状态指示CSI和M个第一参考信号资源指示信息，所述反馈模式指示所述CSI中的各个元素、所述M个第一参考信号资源指示信息的确定顺序，所述CSI包括以下元素的至少一个：秩指示RI、预编码矩阵指示PMI、信道质量指示CQI、信道协方差矩阵或信道特征向量；
    其中，所述M个第一参考信号资源指示信息指示M个第一参考信号资源中，每个第一参考信号资源的索引和/或质量信息，所述M个第一参考信号资源为所述N个第一参考信号资源中的M个第一参考信号资源，M≤N，且为整数。
  44. 根据权利要求43所述的基站，其特征在于，所述反馈模式包括第一反馈模式；
    所述接收模块，具体用于在所述第一反馈模式下，接收所述UE基于所述CSI中的至少一个元素确定的所述M个第一参考信号资源指示信息，所述CSI中的至少一个元素为所述UE根据所述N个第一参考信号资源确定的。
  45. 根据权利要求44所述的基站，其特征在于，所述CSI中的至少一个元素为所述UE在确定所述M个第一参考信号资源指示信息之前、最近一次上报的RI，所述接收模块，具体用于在所述第一反馈模式下，接收所述UE根据所述最近一次上报的RI确定出的所述M个第一参考信号资源指示信息，所述最近一次上报的RI为所述UE根据所述N个第一参考信号资源确定的。
  46. 根据权利要求45所述的基站，其特征在于，
    所述接收模块，在所述第一反馈模式下，接收所述UE根据所述最近一次上报的RI确定出的所述M个第一参考信号资源指示信息之后，还用于接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个为所述UE根据所述最近一次上报的RI和M个第二参考信号资源确定出的，所述M个第二参考信号资源为所述根据关联关系确定出的，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系。
  47. 根据权利要求46所述的基站，其特征在于，所述RI的反馈周期为第一反馈周期，所述M个第一参考信号资源指示信息的反馈周期为第二反馈周期，所述PMI和CQI的反馈周期为第三反馈周期，所述第一反馈周期为所述第二反馈周期的k1倍，所述第二反馈周期为所述第三反馈周期的k2倍，k1≥1且为整数，k2≥1且为整数。
  48. 根据权利要求45～47任一项所述的基站，其特征在于，所述M个第一参考信号资源指示信息为所述UE根据所述N个第一参考信号资源确定出所述最近一次上报的RI，并根据所述最近一次上报的RI查询对应关系表确定出的，所述对应关系表存储RI与M之间存在对应关系。
  49. 根据权利要求43所述的基站，其特征在于，所述反馈模式包括第二反馈模式；
    所述接收模块，具体用于在所述第二反馈模式下接收所述UE基于所述M个第一参考信号资源指示信息确定出的所述CSI，所述M个第一参考信号资源指示信息为所述UE根据所述N个第一参考信号资源确定出的。
  50. 根据权利要求49所述的基站，其特征在于，所述M个第一参考信号资源指示信息为所述UE在确定所述CSI之前、最近一次上报的M个第一参考信号资源指示信息。
  51. 根据权利要求50所述的基站，其特征在于，
    所述接收模块，具体用于在所述第二反馈模式下，接收所述UE根据所述M个第一参考信号资源确定出的RI。
  52. 根据权利要求51所述的基站，其特征在于，
    所述接收模块，在接收所述UE根据所述M个第一参考信号资源确定出的RI之后，还用于接收所述UE上报的PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个，所述PMI、CQI、信道协方差矩阵或信道特征向量中的至少一个为所述UE根据M个第二参考信号资源确定出的，所述M个第二参考信号资源为所述UE根据关联关系确定出，所述关联关系为所述M个第一参考信号资源与所述M个第二参考信号资源之间的关联关系。
  53. 根据权利要求52所述的基站，其特征在于，所述M个第一参考信号资源指示信息的反馈周期为第四反馈周期，所述CSI中的RI的反馈周期为第五反馈周期，所述CSI中的PMI和CQI的反馈周期为第六反馈周期，所述第四反馈周期为所述第五反馈周期的k3倍，所述第五反馈周期为所述第六反馈周期的k4倍，k3≥1且为整数，k4≥1且为整数。
  54. 根据权利要求48或53所述的基站，其特征在于，
    所述接收模块，具体用于接收所述UE上报的目的目的CSI，所述目的CSI包括目的PMI、目的CQI、目的信道协方差矩阵或目的信道特征向量中的至少一个；所述目的CSI为所述UE对M套CSI合成得到的，所述M套CSI为所述UE根据所述最近一次上报的RI和所述M个第二参考信号资源确定出的。
  55. 根据权利要求43～54任一项所述的基站，其特征在于，
    所述发送模块，还用于向所述UE发送高层信令或动态信息，所述高层信令或动态信令中携带所述反馈模式。
  56. 根据权利要求43～54任一项所述的基站，其特征在于，
    所述接收模块，还用于接收所述UE反馈的所述反馈模式。
  57. 一种用户设备，其特征在于，包括：
    处理器、存储器、通信接口和系统总线；
    所述存储器和所述通信接口通过所述系统总线与所述处理器连接并完成相互间的通信；
    所述存储器用于存储计算机执行指令，所述通信接口用于和其他设备进行通信；
    所述处理器用于运行所述计算机执行指令，使所述用户设备执行权利要求1-14任一项所述的方法。
  58. 一种基站，其特征在于，包括：
    处理器、存储器、通信接口和系统总线；
    所述存储器和所述通信接口通过所述系统总线与所述处理器连接并完成相互间的通信；
    所述存储器用于存储计算机执行指令，所述通信接口用于和其他设备进行通信；
    所述处理器用于运行所述计算机执行指令，使所述基站执行权利要求15-28任一项所述的方法。
  59. 一种计算机存储介质，用于储存为用户设备所用的计算机软件指令，所述计算机软件指令包含用于执行权利要求1-15任一项所述的方法所设计的程序。
  60. 一种计算机存储介质，用于储存为基站所用的计算机软件指令，所述计算机软件指令包含用于执行权利要求15-28任一项所述的方法所设计的程序。
PCT/CN2018/071834 2017-01-09 2018-01-09 信道状态信息反馈方法、用户设备及基站 WO2018127193A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2019537182A JP2020506586A (ja) 2017-01-09 2018-01-09 チャネル状態情報フィードバックの方法、ユーザ機器、および基地局
EP18736242.1A EP3565140B1 (en) 2017-01-09 2018-01-09 Channel state information feedback method, user equipment, and base station
US16/505,204 US10673508B2 (en) 2017-01-09 2019-07-08 Channel state information feedback method, user equipment, and base station

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710014457.1 2017-01-09
CN201710014457.1A CN108288989B (zh) 2017-01-09 2017-01-09 信道状态信息反馈方法、用户设备及基站

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US16/505,204 Continuation US10673508B2 (en) 2017-01-09 2019-07-08 Channel state information feedback method, user equipment, and base station

Publications (1)

Publication Number Publication Date
WO2018127193A1 true WO2018127193A1 (zh) 2018-07-12

Family

ID=62789310

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/071834 WO2018127193A1 (zh) 2017-01-09 2018-01-09 信道状态信息反馈方法、用户设备及基站

Country Status (5)

Country Link
US (1) US10673508B2 (zh)
EP (1) EP3565140B1 (zh)
JP (1) JP2020506586A (zh)
CN (1) CN108288989B (zh)
WO (1) WO2018127193A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4046440A4 (en) * 2020-02-12 2022-11-02 Apple Inc. TYPE II CSI PORT SELECTION CODEBOOK EXTENSION WITH PARTIAL RECIPROCITY

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3777064A4 (en) * 2018-03-29 2021-08-04 ZTE Corporation CHANNEL STATUS INFORMATION MESSAGE IN WIRELESS COMMUNICATION NETWORK
CN110830092B (zh) * 2018-08-10 2021-10-26 华为技术有限公司 指示预编码矩阵和确定预编码矩阵的方法以及通信装置
CN109548132B (zh) * 2018-12-12 2021-09-17 维沃移动通信有限公司 一种参考信号传输方法及设备
CN111355566B (zh) * 2018-12-24 2023-03-28 成都华为技术有限公司 信道状态信息获取方法及相关设备
CN111865522B (zh) * 2019-04-29 2022-08-26 北京紫光展锐通信技术有限公司 信道指示及确定方法、装置、用户设备及基站
WO2021062875A1 (en) * 2019-10-04 2021-04-08 Qualcomm Incorporated Applying a codebook subset restriction to a precoding matrix indicator and a channel quality indication for type-ii channel state information
CN111010245B (zh) * 2019-11-28 2021-09-28 捷开通讯(深圳)有限公司 参考信号接收功率值的上报方法、装置及移动终端

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103716078A (zh) * 2012-09-29 2014-04-09 中兴通讯股份有限公司 一种信道状态信息的处理方法及装置
US20150222335A1 (en) * 2012-08-27 2015-08-06 China Academy Of Telecommunications Technology Method, system and device for feeding back and receiving pmi
WO2016051792A1 (en) * 2014-10-01 2016-04-07 Nec Corporation Method and system for mimo communication
CN105634680A (zh) * 2014-10-31 2016-06-01 电信科学技术研究院 一种信道状态信息的反馈、获取方法及装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101873615A (zh) 2009-04-27 2010-10-27 松下电器产业株式会社 无线通信系统及其下行链路接收功率检测方法
US10250364B2 (en) * 2011-12-09 2019-04-02 Nokia Corporation Channel measurements supporting coordinated multi-point operation
US8958331B2 (en) 2012-07-02 2015-02-17 Intel Corporation HARQ-ACK handling for unintended downlink sub-frames
US9225478B2 (en) * 2012-07-02 2015-12-29 Intel Corporation Supporting measurments and feedback for 3D MIMO with data transmission optimization
GB2507782B (en) * 2012-11-09 2015-01-21 Broadcom Corp Methods and apparatus for wireless transmission
WO2015074262A1 (zh) * 2013-11-22 2015-05-28 华为技术有限公司 一种信道状态信息的反馈方法及装置
JP2015185953A (ja) * 2014-03-20 2015-10-22 株式会社Ｎｔｔドコモ ビーム選択方法、基地局、およびユーザ装置
CN107005287B (zh) * 2015-08-15 2020-12-15 华为技术有限公司 信道状态信息反馈方法、用户设备及基站
CN106953672B (zh) * 2016-01-07 2020-04-14 中兴通讯股份有限公司 一种多天线系统中信道信息反馈的方法及终端
WO2018027908A1 (en) * 2016-08-12 2018-02-15 Qualcomm Incorporated Dynamic multi-beam transmission for new radio technology multiple-input multiple-output

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150222335A1 (en) * 2012-08-27 2015-08-06 China Academy Of Telecommunications Technology Method, system and device for feeding back and receiving pmi
CN103716078A (zh) * 2012-09-29 2014-04-09 中兴通讯股份有限公司 一种信道状态信息的处理方法及装置
WO2016051792A1 (en) * 2014-10-01 2016-04-07 Nec Corporation Method and system for mimo communication
CN105634680A (zh) * 2014-10-31 2016-06-01 电信科学技术研究院 一种信道状态信息的反馈、获取方法及装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
See also references of EP3565140A4
XINWEI: "Discussion on CSI Report for Non-precoding CSI-RS in FD-MIMO", 3GPP TSG WG1 MEETING #82 R1-154688, 28 August 2015 (2015-08-28), Beijing, China, XP050993724, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_82/Docs/> *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4046440A4 (en) * 2020-02-12 2022-11-02 Apple Inc. TYPE II CSI PORT SELECTION CODEBOOK EXTENSION WITH PARTIAL RECIPROCITY

Also Published As

Publication number Publication date
US20190334602A1 (en) 2019-10-31
EP3565140A4 (en) 2020-01-15
US10673508B2 (en) 2020-06-02
EP3565140A1 (en) 2019-11-06
CN108288989B (zh) 2020-12-08
EP3565140B1 (en) 2023-04-19
CN108288989A (zh) 2018-07-17
JP2020506586A (ja) 2020-02-27

Similar Documents

Publication Publication Date Title
WO2018127193A1 (zh) 信道状态信息反馈方法、用户设备及基站
CN109495879B (zh) 一种资源配置方法、基站和终端
EP4167629A1 (en) Measurement reporting method and apparatus
US20230009991A1 (en) Channel reciprocity-based precoding matrix configuration method and apparatus
US11804884B2 (en) Precoding processing method and apparatus
WO2017020749A1 (zh) 一种fd mimo系统信道状态信息反馈方法及相关设备
WO2018126794A1 (zh) 一种资源指示方法、装置及系统
WO2022143092A1 (zh) 定位方法、设备及计算机可读存储介质
KR20160086948A (ko) 채널 상태 정보의 피드백 방법 및 장치
US11363585B2 (en) Method and apparatus for obtaining downlink channel information
CN114499786B (zh) 一种信号传输方法及装置
WO2016183835A1 (zh) 传输信号的方法和设备
CN112740564B (zh) 通信方法、装置及系统
WO2020062265A1 (zh) 通信方法、装置、网络设备、终端设备及系统
WO2022151859A1 (zh) 一种信息处理方法、装置、终端及网络侧设备
US11979212B2 (en) Method and apparatus for determining channel state information
EP4319204A1 (en) Information processing method and apparatus, and terminal and network-side device
US20240204844A1 (en) Information feedback method and related apparatus
EP4373004A1 (en) Information feedback method and related apparatus
WO2023202338A1 (zh) 信息传输方法、装置、终端、网络侧设备及介质
WO2022142459A1 (zh) 信号传输方法及装置、终端、接入网设备
CN117394890A (zh) 码本传输方法、装置及存储介质
CN117200841A (zh) 波束极化方向确定方法、装置及存储介质
CN115333589A (zh) 下行出发角确定方法、网络侧、定位端、装置和存储介质
CN118054820A (zh) 确定波束赋形中的组合系数的方法、终端及装置

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: 18736242

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2019537182

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018736242

Country of ref document: EP

Effective date: 20190729