WO2016192544A1 - 一种信道状态信息的反馈及其控制方法及装置 - Google Patents

一种信道状态信息的反馈及其控制方法及装置 Download PDF

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Publication number
WO2016192544A1
WO2016192544A1 PCT/CN2016/082989 CN2016082989W WO2016192544A1 WO 2016192544 A1 WO2016192544 A1 WO 2016192544A1 CN 2016082989 W CN2016082989 W CN 2016082989W WO 2016192544 A1 WO2016192544 A1 WO 2016192544A1
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Prior art keywords
pmi
indication information
feed back
signaling
trigger signaling
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PCT/CN2016/082989
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English (en)
French (fr)
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陈润华
高秋彬
拉盖施
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电信科学技术研究院
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Priority to JP2017563042A priority Critical patent/JP7016262B2/ja
Priority to EP16802467.7A priority patent/EP3307013B1/en
Priority to KR1020187000165A priority patent/KR102087308B1/ko
Priority to US15/579,122 priority patent/US11038574B2/en
Publication of WO2016192544A1 publication Critical patent/WO2016192544A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—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
    • 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
    • H04B7/06—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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a feedback of channel state information and a method and apparatus for controlling the same.
  • CSI channel state information
  • UE User Equipment
  • LTE Long Term Evolution
  • PMI Precoding Matrix Indicator
  • the UE With the feedback of the PMI, the UE simultaneously feeds back the Rank Indicator (RI) corresponding to the PMI, which is equivalent to the number of code streams that can be supported, and the Channel Quality Indicator (CQI) under the RI/PMI.
  • RI Rank Indicator
  • CQI Channel Quality Indicator
  • the size of the prediction matrix corresponding to the fed PMI is Nt x RI, where Nt is the number of base station antennas (such as 2, 4, 8).
  • the feedback of the CSI can be either periodic or aperiodic.
  • the eNB schedules the CSI reported by the UE through dynamic signaling.
  • the aperiodic mode in LTE is implemented by an uplink grant (UL grant).
  • the eNB sends a Downlink Control Information (DCI) to indicate an uplink grant (uplink grant) to notify the UE when the physical uplink shared channel (PUSCH) is scheduled to perform uplink data transmission.
  • DCI Downlink Control Information
  • the parameters of the uplink transmission such as the bandwidth of the transmission, the frequency domain resources (such as the physical resource block (PRB) transmission power, etc.).
  • PRB physical resource block
  • a part of the control signaling may be used to notify the UE whether to transmit the PUSCH uplink.
  • the UE feeds back CSI (including RI, PMI, and CQI) together with PUSCH data.
  • the existing system also supports the behavior of only feeding back CSI without transmitting uplink data. At this time, the UE feeds back CSI in PUSCH transmission, but does not include in PUSCH.
  • PMI is a precoding matrix indication, representing a codeword in a codebook, and its corresponding antenna The number can be 2, 4 or 8.
  • 3D-Multiple Input Multiple Output 3D-Multiple Input Multiple Output
  • An important feature of 3D-MIMO is that the number of antennas on the base station side is very large and can be a two-dimensional antenna structure, for example, 16, 32, 64 antennas, etc., called a large-scale antenna system.
  • the embodiment of the present application provides a channel state information feedback and a control method and device thereof, which are used to implement CSI feedback under a large-scale antenna system, and the UE may only need to feed back part of the PMI information, so that the UE feedback CSI complexity is reduced.
  • the flexibility of the network side to control the UE to feedback CSI is better.
  • the base station determines that the user equipment UE is required to feed back the CSI, where the CSI includes at least a first precoding matrix indication information PMI and a second PMI, where the first PMI and the second PMI correspond to the same precoding matrix;
  • the base station sends trigger signaling of CSI feedback to the UE, where the indication information for indicating whether the UE feeds back the first PMI and/or the second PMI is included.
  • the base station determines that the user equipment UE is required to feed back the CSI, where the CSI includes at least a first precoding matrix indication information PMI and a second PMI, where the first PMI and the second PMI correspond to the same precoding matrix.
  • the base station sends the trigger signaling of the CSI feedback to the UE, where the indication information for indicating whether the UE feeds back the first PMI and/or the second PMI is included, thereby implementing CSI feedback under the large-scale antenna system, and making the large In the scale antenna system, the UE may only need to feed back part of the PMI information, so that the complexity of the feedback CSI is low, and the flexibility of the network side to control the UE to feed back the CSI is better.
  • the triggering signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI; or the triggering signaling includes, in the trigger signaling, indicating that the UE does not feed back the first PMI and the first Two PMI instructions.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • the triggering signaling includes indication information for indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining the first PMI; or
  • the trigger signaling includes indication information for indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining a second PMI.
  • the method further includes: the base station semi-statically notifying the UE by using the high layer signaling to determine the indication information of the second PMI; or
  • the method further includes: the base station semi-statically notifying the UE by using the high layer signaling to determine the indication information of the first PMI.
  • the UE determines the second PMI by using the second PMI of the last feedback;
  • the UE determines the first PMI using the first PMI that was last fed back.
  • the trigger signaling when the trigger signaling does not include indication information for instructing the UE to feed back the second PMI, the trigger signaling further includes a second PMI or a last feedback indicating that the UE uses the high-level signaling semi-static notification. Second PMI to determine the second PMI; or,
  • the trigger signaling When the trigger signaling does not include the indication information for instructing the UE to feed back the first PMI, the trigger signaling further includes indication information for determining the first PMI or the most recent indication that the UE uses the high-level signaling semi-static notification. The first PMI is fed back to determine the first PMI.
  • the user equipment UE receives the trigger signaling of the CSI feedback sent by the base station, and includes indication information for indicating whether the UE feeds back the first precoding matrix indication information PMI and/or the second PMI;
  • the UE performs CSI feedback according to the trigger signaling.
  • the user equipment UE receives the trigger signaling of the CSI feedback sent by the base station, and includes indication information for indicating whether the UE feeds back the first precoding matrix indication information PMI and/or the second PMI;
  • the triggering signaling is performed to perform the CSI feedback, so as to implement the CSI feedback in the large-scale antenna system, and the triggering signaling of the CSI feedback sent by the base station includes indicating whether the UE feeds back the first precoding matrix indication information PMI or
  • the indication information of the second PMI is used, the UE only needs to feed back the CSI of the partial-dimension antenna, so that the complexity of the feedback CSI is low, and the flexibility of the network-side control UE to feed back the CSI is better.
  • the triggering signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI; or the triggering signaling includes, in the trigger signaling, indicating that the UE does not feed back the first PMI and the first Two PMI instructions.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • a first codebook including M codewords and a second codebook including N codewords are preset.
  • the triggering signaling includes: indication information indicating a first precoding matrix indicating PMI of an antenna that feeds back a vertical dimension of the UE or indication information of a second PMI of an antenna of a horizontal dimension, where the first PMI corresponds to the first One yard
  • the codeword in the second PMI corresponds to the codeword in the second codebook.
  • the trigger signaling specifically includes indication information for indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining the first PMI;
  • the UE The CSI feedback is performed according to the triggering signaling, and the method includes: determining, by the UE, the first PMI according to the indication information of the first PMI, determining the second PMI according to the first PMI, and feeding back the second PMI to the Base station
  • the trigger signaling includes indication information for indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining the second PMI, where the UE is configured according to the trigger
  • the CSI feedback is performed, and the method includes: determining, by the UE, the second PMI according to the indication information of the second PMI, determining the first PMI according to the second PMI, and feeding back the first PMI to the base station.
  • the UE when the triggering signaling does not include the indication information for instructing the UE to feed back the second PMI, the UE performs CSI feedback according to the trigger signaling, which specifically includes: the UE is preset according to the preset a second PMI, or the base station semi-statically notifying the UE by using the high layer signaling to determine the indication information of the second PMI, or the second PMI that was last reported, determining the first PMI, and feeding back the first PMI to the Base station
  • the UE when the trigger signaling does not include the indication information that is used to indicate that the UE feeds back the first PMI, the UE performs CSI feedback according to the trigger signaling, and specifically includes: the UE is configured according to the preset first. a PMI, or the base station semi-statically notifying the UE by using the high layer signaling to determine the indication information of the first PMI, or the first PMI reported last time, determining the second PMI, and feeding back the second PMI to the base station .
  • a first unit configured to determine that the user equipment UE is required to feed back CSI, where the CSI includes at least a first precoding matrix indication information PMI and a second PMI, where the first PMI and the second PMI correspond to the same precoding matrix;
  • a second unit configured to send, to the UE, trigger signaling of CSI feedback, where the indication information used to indicate whether the UE feeds back the first PMI and/or the second PMI is included.
  • the triggering signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI; or the triggering signaling includes, in the trigger signaling, indicating that the UE does not feed back the first PMI and the first Two PMI instructions.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • the triggering signaling includes indication information for indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining the first PMI; or
  • the trigger signaling includes indication information for indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining a second PMI.
  • the second unit is further configured to: semi-statically notify the UE by using the high layer signaling to determine the second PMI. Instructions; or,
  • the second unit is further configured to: semi-statically notify the UE by using the high layer signaling to determine the indication information of the first PMI.
  • the UE determines the second PMI by using the second PMI of the last feedback;
  • the UE determines the first PMI using the first PMI that was last fed back.
  • the trigger signaling when the trigger signaling does not include indication information for instructing the UE to feed back the second PMI, the trigger signaling further includes, by using the high-level signaling semi-static notification, the UE to determine the second PMI. a second PMI indicating the information or the last feedback to determine the second PMI; or,
  • the trigger signaling When the trigger signaling does not include indication information for instructing the UE to feed back the first PMI, the trigger signaling further includes a first PMI indicating that the UE uses the high-level signaling semi-static notification or the first PMI of the last feedback. To determine the first PMI.
  • a receiving unit configured to receive trigger signaling of CSI feedback sent by the base station, where the indication information is used to indicate whether the UE feeds back the first precoding matrix indication information PMI and/or the second PMI;
  • a feedback unit configured to perform CSI feedback according to the trigger signaling.
  • the triggering signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI; or the triggering signaling includes, in the trigger signaling, indicating that the UE does not feed back the first PMI and the first Two PMI instructions.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • the trigger signaling specifically includes indication information indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining a first PMI;
  • the feedback unit Specifically, the first PMI is determined according to the indication information of the first PMI, and the second PMI is determined according to the first PMI, and the second PMI is fed back to the base station;
  • the triggering signaling includes indication information for indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining the second PMI, where the feedback unit is specifically configured to: And determining, according to the indication information of the second PMI, the second PMI, and determining the first PMI according to the second PMI, and feeding back the first PMI to the base station.
  • the feedback unit is specifically configured to: according to a preset second PMI, or the base station passes a high-level letter The semi-statically informing the UE to determine the indication information of the second PMI, or the second PMI that was last reported, determining the first PMI, and feeding back the first PMI to the base station;
  • the feedback unit is specifically configured to: according to the preset first PMI, or the base station passes the high layer signaling half
  • the static notification UE is used to determine the indication information of the first PMI, or the first PMI that was last reported, determine the second PMI, and feed back the second PMI to the base station.
  • the feedback control device of another channel state information CSI includes:
  • a processor for reading a program in the memory performing the following process:
  • the CSI includes at least a first precoding matrix indication information PMI and a second PMI, where the first PMI and the second PMI correspond to the same precoding matrix;
  • the control transceiver sends the trigger signaling of the CSI feedback to the UE, where the indication information for indicating whether the UE feeds back the first PMI and/or the second PMI is included.
  • the triggering signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI; or the triggering signaling includes, in the trigger signaling, indicating that the UE does not feed back the first PMI and the first Two PMI instructions.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • the triggering signaling includes indication information for indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining the first PMI; or
  • the trigger signaling includes indication information for indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining a second PMI.
  • the processor is further configured to: control the transceiver to semi-statically notify the UE by using the high layer signaling to determine the first Two PMI instructions; or,
  • the processor is further configured to: control the transceiver to semi-statically notify the UE by using the high layer signaling to determine the indication of the first PMI. information.
  • the UE determines the second PMI by using the second PMI of the last feedback;
  • the UE determines the first PMI using the first PMI that was last fed back.
  • the trigger signaling when the trigger signaling does not include indication information for instructing the UE to feed back the second PMI, the trigger signaling further includes, by using the high-level signaling semi-static notification, the UE to determine the second PMI. a second PMI indicating the information or the last feedback to determine the second PMI; or,
  • the trigger signaling When the trigger signaling does not include indication information for instructing the UE to feed back the first PMI, the trigger signaling further includes a first PMI indicating that the UE uses the high-level signaling semi-static notification or the first PMI of the last feedback. To determine the first PMI.
  • the feedback device of another channel state information CSI provided by the embodiment of the present application includes:
  • a processor for reading a program in the memory performing the following process:
  • the control transceiver receives the trigger signaling of the CSI feedback sent by the base station, and includes indication information for indicating whether the UE feeds back the first precoding matrix indication information PMI and/or the second PMI, and controls the sending and receiving according to the trigger signaling.
  • the machine performs CSI feedback.
  • the triggering signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI; or the triggering signaling includes, in the trigger signaling, indicating that the UE does not feed back the first PMI and the first Two PMI instructions.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • the trigger signaling specifically includes indication information for indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining the first PMI; Determining, according to the indication information of the first PMI, a first PMI, and determining a second PMI according to the first PMI, and controlling the transceiver to feed back the second PMI to the base station;
  • the trigger signaling includes indication information indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining the second PMI; the processor is according to the second
  • the indication information of the PMI determines a second PMI, and determines a first PMI according to the second PMI, and controls the transceiver to feed back the first PMI to the base station.
  • the processor periodically or semi-statically notifies the UE according to the preset second PMI, or the base station by using the high layer signaling. Determining the second PMI, or determining the first PMI, and controlling the transceiver to feed back the first PMI to the base station;
  • the processor is configured to use the first PMI according to a preset, or the base station semi-statically notifies the UE by using the high layer signaling. Determining the indication information of the first PMI, or the first PMI reported last time, determining the second PMI, and controlling the transceiver to the second The PMI is fed back to the base station.
  • FIG. 1 is a schematic flowchart diagram of a feedback control method for channel state information according to an embodiment of the present disclosure
  • FIG. 2 is a schematic flowchart of a method for feeding back channel state information according to an embodiment of the present application
  • FIG. 3 is a schematic structural diagram of a feedback control apparatus for channel state information according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a device for feeding back channel state information according to an embodiment of the present disclosure
  • FIG. 5 is a schematic structural diagram of another feedback control apparatus for channel state information according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another apparatus for feeding back channel state information according to an embodiment of the present disclosure.
  • the embodiment of the present application provides a channel state information feedback and a control method and device thereof, which are used to implement CSI feedback under a large-scale antenna system, and make the UE feedback CSI less complex, and the network side controls the UE to feed back CSI. More flexibility.
  • the industry has emerged an active antenna that can independently control each array.
  • the antenna array is horizontally aligned from the current two-dimensional plane to the horizontal and vertical alignment within the three-dimensional space. This way of the antenna array makes it possible to dynamically adjust the beam in both the horizontal and vertical directions, not only in the horizontal direction of the beam adjustment in the conventional antenna system.
  • the feedback codeword of a large-scale antenna system may correspond to two PMIs, each corresponding to a codeword in two low-dimensional codebooks.
  • the base station has a total of 32 antennas, 4 vertical dimensions, and 8 horizontal dimensions.
  • the system defines two low-dimensional codebooks, the first codebook is a 4Tx codebook, corresponding to the vertical dimension.
  • the second codebook is an 8Tx codebook, corresponding to the horizontal dimension.
  • the UE feeds back the first PMI and the second PMI, wherein the first PMI corresponds to the 4Tx precoder W1 in the first codebook, and the second PMI corresponds to the 8Tx precoder W2 in the second codebook.
  • the overall 32Tx precoder W can be written as:
  • the eNB scheduling flexibility is small.
  • the eNB has no way to control the content fed back by the UE. If the eNB does not need new first PMI feedback but only needs feedback from the second PMI, there is no way to implement the 1-bit trigger because the 1-bit trigger always triggers the first PMI and the second PMI feedback at the same time.
  • the eNB only needs one PMI feedback, and does not need feedback from another PMI.
  • PMI1 corresponds to the shaping information of the vertical dimension. Because the position of the UE in the vertical dimension changes very slowly, or even does not change substantially, the change of PMI1 is also very slow. The eNB does not need the UE to frequently feed back the information of PMI1.
  • the eNB may only need the UE to feed back the PMI2 information for a long period of time to reflect the channel in the horizontal direction.
  • the vertical dimension state information corresponding to the PMI1 may be obtained by the eNB in the uplink measurement without UE feedback, and the eNB only needs the UE to feed back the PMI2 information. Therefore, the feedback of the large-scale antenna system needs to support the mechanism that the eNB only triggers a part of the PMI feedback without triggering another part of the PMI feedback.
  • the CQI may also be fed back at the same time.
  • the embodiment of the present application proposes that the network side can notify the UE to feed back the CSI of a part of the antenna, and even notify the UE not to feed back the CSI, and of course, can also feed back all the CSIs.
  • a feedback control method for channel state information CSI provided by an embodiment of the present application includes:
  • the base station determines that the user equipment UE is required to feed back CSI, where the CSI includes at least a first precoding matrix indication information PMI and a second PMI, where the first PMI and the second PMI correspond to the same precoding matrix.
  • the application scenario is a large-scale antenna system
  • the shaping matrix information in the channel is jointly determined by the first PMI and the second PMI fed back by the UE.
  • the first PMI corresponds to a codebook of the horizontal dimension
  • the second PMI corresponds to a codebook of the vertical dimension
  • the Kronecker product of the shape matrix of the two PMIs reflects the overall shape matrix information of the large-scale antenna system (this is only one It is possible that there is also a possibility that the correspondence between the other shaping matrix and the first PMI/second PMI).
  • the base station sends, to the UE, trigger signaling of CSI feedback, where the indication information for indicating whether the UE feeds back the first PMI and/or the second PMI is included.
  • the CSI feedback in the large-scale antenna system is implemented by the method, and if the base station sends the trigger signaling of the CSI feedback to the UE, the indication information for indicating whether the UE feeds back the first PMI or the second PMI is included. Time, The UE may be allowed to feed back only a portion of the CSI, such as information corresponding to a portion of the CSI dimension of the antenna array.
  • the base station determines that the user equipment UE needs to control the feedback of the CSI, and sends the triggering signaling of the CSI feedback to the UE, where the indication information for indicating the CSI of the feedback part of the UE is included, so that the UE is in the large-scale antenna system.
  • the 3D-MIMO codeword corresponds to two PMIs, that is, the first PMI and the second PMI. Therefore, in the embodiment of the present application, the following four trigger states are supported:
  • State 3 The UE is triggered to report only the second PMI.
  • the system may signal the UE to a hypothesis of the first PMI, and the UE calculates the feedback of the second PMI and the CQI according to the assumption of the first PMI.
  • the first PMI notified by the system may correspond to the first PMI of the vertical dimension, may be obtained by channel reciprocity, or may be obtained by feedback of the previous first PMI.
  • the UE can calculate the second PMI using Equation 1. Since the UE only needs to find the codebook of the second PMI, the complexity is greatly reduced.
  • the triggering of the first PMI and the second PMI may be separately coded or integrated in the signaling. It is assumed that the first codebook includes M codewords, and the second codebook includes N codewords. The first PMI corresponds to the codeword in the first codebook, and the second PMI corresponds to the codeword in the second codebook.
  • a first codebook including M codewords and a N codeword second are preset.
  • a codebook that is, a first codebook including M codewords and a second codebook including N codewords are agreed in advance on the base station side and the UE side;
  • the first codebook may correspond to a vertical dimension Matrix information
  • the second codebook may correspond to the shape matrix information of the horizontal dimension;
  • the trigger signaling includes indication information (for example, corresponding to a horizontal dimension antenna) for indicating that the UE feeds back the first precoding matrix indication PMI (for example, an antenna corresponding to a vertical dimension) and/or a second PMI,
  • the first PMI corresponds to a codeword in the first codebook
  • the second PMI corresponds to a codeword in the second codebook.
  • the trigger signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI; or the trigger signaling includes, in the trigger signaling, indicating that the UE does not feed back the first PMI and the second PMI. Instructions.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • the network side may notify a part of the PMI to the UE, and notify the UE to feed back another part of the PMI. That is, the trigger signaling specifically includes indication information for indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining the first PMI; or the trigger signal The instruction includes indication information indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining the second PMI.
  • the part of the PMI that is notified to the UE by the network side may also be notified to the UE in a semi-static manner by the high layer signaling. Therefore, when the trigger signaling does not include the indication information for instructing the UE to feed back the second PMI, the method further includes: The base station semi-statically notifies the UE by using the high layer signaling to determine the indication information of the second PMI; or
  • the method further includes: the base station semi-statically notifying the UE by using the high layer signaling to determine the indication information of the first PMI.
  • the UE determines the second PMI by using the second PMI of the last feedback;
  • the UE determines the first PMI using the first PMI that was last fed back.
  • the trigger signaling when the trigger signaling does not include indication information for instructing the UE to feed back the second PMI, the trigger signaling further includes, by using the high-level signaling semi-static notification, the UE to determine the second PMI. a second PMI indicating the information or the last feedback to determine the second PMI; or,
  • the trigger signaling When the trigger signaling does not include the indication information for instructing the UE to feed back the first PMI, the trigger signaling further includes indication information for determining the first PMI or the most recent indication that the UE uses the high-level signaling semi-static notification. The first PMI is fed back to determine the first PMI.
  • the eNB may measure the vertical dimension shaping information of the uplink channel (equivalent to the first PMI) by using the uplink and downlink channel reciprocity, and then notify the UE by using the high-level signaling, and the UE uses the first PMI as a hypothesis measurement. Report the second PMI.
  • the eNB triggers the UE to measure the first PMI itself, and detects the second PMI according to the first PMI. In some scenarios it may be necessary to dynamically switch between the two states. For example, in the case where the UE speed changes greatly, the UE's rate can be high or low.
  • the UE rate is lower, the first PMI accuracy measured by the eNB may be acceptable, and the eNB may allow the UE to use the first PMI notified by the higher layer signaling. If the UE rate is higher at a certain time point and the eNB expects to measure the first PMI by itself, the UE may select the first PMI measured by the UE as a reference.
  • a method for feeding back channel state information CSI provided by the embodiment of the present application includes:
  • the user equipment UE receives the trigger signaling of the CSI feedback sent by the base station, and includes indication information for indicating whether the UE feeds back the first PMI and/or the second PMI, such as an indication of the CSI of the partial-dimension antenna of the feedback antenna array. information;
  • the UE performs CSI feedback according to the trigger signaling.
  • the UE receives the trigger signaling of the CSI feedback sent by the base station, where the method includes: Indicating information of the first PMI and/or the second PMI (such as the CSI of the partial-dimension antenna of the antenna array); the UE performs CSI feedback according to the trigger signaling, so that under the large-scale antenna system, the UE may It is only necessary to feed back part of the CSI (such as the CSI of the partial-dimension antenna), so that the complexity of the feedback CSI is low, and the flexibility of the network-side control UE to feed back the CSI is better.
  • the method includes: Indicating information of the first PMI and/or the second PMI (such as the CSI of the partial-dimension antenna of the antenna array); the UE performs CSI feedback according to the trigger signaling, so that under the large-scale antenna system, the UE may It is only necessary to feed back part of the CSI (such as the CSI of the partial-dimension antenna), so that the complexity of the feedback CSI is low, and the flexibility of the
  • the antenna array is composed of an Nt1 vertical dimension antenna and an Nt2 horizontal dimension antenna
  • a first codebook including M codewords and a second codebook including N codewords are preset.
  • the trigger signaling includes an indication for indicating that the UE feeds back the first precoding matrix indicating PMI (for example, PMI information of an antenna corresponding to a vertical dimension) and/or an indication of a second PMI (for example, an antenna corresponding to a horizontal dimension) Information, wherein the first PMI corresponds to a codeword in the first codebook, and the second PMI corresponds to a codeword in the second codebook.
  • PMI for example, PMI information of an antenna corresponding to a vertical dimension
  • a second PMI for example, an antenna corresponding to a horizontal dimension
  • the triggering signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI; or the triggering signaling includes, in the trigger signaling, indicating that the UE does not feed back the first PMI and the first Two PMI instructions.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • the trigger signaling specifically includes indication information for indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining the first PMI;
  • the UE The CSI feedback is performed according to the triggering signaling, and the method includes: determining, by the UE, the first PMI according to the indication information of the first PMI, determining the second PMI according to the first PMI, and feeding back the second PMI to the Base station
  • the trigger signaling includes indication information for indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining the second PMI, where the UE is configured according to the trigger
  • the CSI feedback is performed, and the method includes: determining, by the UE, the second PMI according to the indication information of the second PMI, determining the first PMI according to the second PMI, and feeding back the first PMI to the base station.
  • the UE when the triggering signaling does not include the indication information for instructing the UE to feed back the second PMI, the UE performs CSI feedback according to the trigger signaling, which specifically includes: the UE is preset according to the preset a second PMI, or the base station semi-statically notifying the UE by using the high layer signaling to determine the indication information of the second PMI, or the second PMI that was last reported, determining the first PMI, and feeding back the first PMI to the Base station
  • the UE when the trigger signaling does not include the indication information that is used to indicate that the UE feeds back the first PMI, the UE performs CSI feedback according to the trigger signaling, and specifically includes: the UE is configured according to the preset first. a PMI, or the base station semi-statically notifying the UE by using the high layer signaling to determine the indication information of the first PMI, or the first PMI reported last time, determining the second PMI, and feeding back the second PMI to the base station .
  • the base station may separately encode the trigger fields of the first PMI and the second PMI, or may jointly code.
  • the separate coding of the trigger domain for the first PMI and the second PMI is as follows:
  • State 1 Trigger the UE to perform feedback on the first PMI.
  • State 3 The system notifies the first PMI to the UE, and the UE uses the first PMI to calculate the second PMI.
  • the signaling to notify the first PMI needs to occupy a plurality of bits.
  • state one and state two can be encoded together with 1-bit.
  • State 3 can be coded separately or with state one and/or state two.
  • state one and state two can notify the UE with 1 bit.
  • the network side may use one bit to notify the UE to report the first PMI or not to report the first PMI. For example, when the bit is equal to 0, the UE is notified to report the first PMI, and the bit is equal to At 1 o'clock, it indicates that the UE is notified that the first PMI is not reported.
  • state three is separated from state one and state two, dynamic signaling includes two fields, one is to trigger whether the first PMI is reported (using 1-bit), that is, state one and state two are notified by the following table two.
  • the network side may use one bit to notify the UE to report the first PMI or not to report the first PMI. For example, when the bit is equal to 0, it indicates that the UE is notified to report the first PMI, and the bit is equal to At 1 o'clock, it indicates that the UE is notified that the first PMI is not reported.
  • the network side may notify the UE of the first PMI by using the indication field of the first PMI. For example, when the value of the indication field is equal to 0, it indicates that the UE is notified to use the first precoding in the first codebook as the first PMI, and when the value of the indication field is equal to 1, it indicates that the UE is notified to be the second in the first codebook.
  • the precoding is used as the first PMI, and so on.
  • the value of the indication field is equal to M-1, it indicates that the UE is notified to use the Mth precoding matrix in the first codebook as the first PMI. Where M is the number of codewords included in the first codebook.
  • the UE calculates and feeds back the second PMI by using the first PMI notified by the network side.
  • the first PMI and the second PMI jointly correspond to a channel corresponding to a precoding matrix, for example, Equation 1.
  • the state is included to notify the UE to calculate and feed back the second PMI, such as the corresponding state M in Table III.A.
  • the network does not schedule the UE to feed back the first PMI (see Table 1), the UE does not need to notify the UE of the first PMI through dynamic signaling, and the UE needs the first PMI to calculate the second PMI.
  • the first PMI is the first PMI of the upper half semi-static signaling, or the first PMI of the last feedback, or a preset fixed PMI.
  • the network also schedules the UE to feed back the first PMI (see Table 1), the UE may calculate the second PMI and feed back the second PMI using the fed back first PMI.
  • a state (state M+1) may also be included to inform the UE not to feed back the second PMI.
  • State 3 can also be encoded with State One and State Two. As shown in Table 4 below:
  • the network side may notify the UE of the first PMI by using an indication field (or a trigger domain) of the first PMI.
  • an indication field or a trigger domain
  • the value of the indication field is equal to 0, indicating that the first precoding in the first codebook is used as the first PMI, and the value of the indication field is equal to 1, indicating that the UE is notified to be the second one in the first codebook.
  • the precoding is used as the first PMI, and so on.
  • the value of the indication field is equal to M-1, it indicates that the UE is notified to use the Mth precoding matrix in the first codebook as the first PMI. Where M is the number of codewords included in the first codebook.
  • the value of the indication field When the value of the indication field is equal to M, it indicates that the UE is triggered to report the first PMI and the second PMI. When the value of the indication field is equal to M+1, it indicates that the UE does not trigger the reporting of the first PMI and the second PMI, and the UE does not need to report the first PMI and the second PMI.
  • the UE may adopt a preset fixed number.
  • the following is a description of the trigger domain joint coding of the first PMI and the second PMI.
  • the following requirements are required for the UE to support at least the following states:
  • State 3 The UE feeds back the second PMI, does not feed back the first PMI, and the UE uses the first PMI notified by one eNB to perform feedback of the second PMI.
  • dynamic signaling may include two trigger domains, and 1-bit is used to trigger the first PMI and the second PMI feedback, as shown in Table 5 below;
  • the bit is used by the system to notify the UE of the assumption of the first PMI, that is, the first PMI is notified to the UE, as shown in Table 6 below:
  • the value of the 1-bit indication field of the first PMI when the value of the 1-bit indication field of the first PMI is 0, it indicates that the UE is triggered to use the first precoding in the first codebook as the first PMI, and triggers the UE to report the second PMI.
  • the value of the 1-bit indication field of the first PMI is 1, it indicates that the UE is triggered to use the second precoding in the first codebook as the first PMI, and triggers the UE to report the second PMI; and so on.
  • the value of the 1-bit indication field of a PMI is M-1, it indicates that the UE is triggered to use the Mth precoding in the first codebook as the first PMI, and triggers the UE to report the second PMI.
  • dynamic signaling may include multiple bits for triggering, for example:
  • the value of the indication field when the value of the indication field (or trigger field) is 0, it indicates that the triggering UE uses the first precoding in the first codebook as the first PMI; when indicating the domain (or trigger domain) A value of 1 indicates that the UE is triggered to use the second precoding in the first codebook as the first PMI, and so on.
  • the value of the indication field is M-1, it indicates that the UE is triggered to use the first
  • the Mth precoding in the codebook is reported as the first PMI, and the second PMI is reported.
  • the value of the indication domain (or the triggering domain) is M, it indicates that the UE is triggered to report the first PMI and the second PMI, and when the value of the indication domain (or the triggering domain) is M+1, it indicates that the UE is not triggered to report the first PMI. And the second PMI, that is, the UE does not report the first PMI and the second PMI.
  • first PMI and the second PMI described above may be used interchangeably.
  • the feedback control device for the channel state information CSI includes:
  • the first unit 11 is configured to determine that the user equipment UE is required to feed back CSI, where the CSI includes at least a first precoding matrix indication information PMI and a second PMI, where the first PMI and the second PMI correspond to the same precoding matrix. ;
  • the second unit 12 is configured to send, to the UE, trigger signaling of CSI feedback, where the indication information for indicating whether the UE feeds back the first PMI and/or the second PMI is included.
  • the trigger signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI; or
  • the trigger signaling includes indication information for indicating that the UE does not feed back the first PMI and the second PMI.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • the triggering signaling includes indication information for indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining the first PMI; or
  • the trigger signaling includes indication information for indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining a second PMI.
  • the second unit is further configured to: semi-statically notify the UE by using the high layer signaling to determine the second PMI. Instructions; or,
  • the second unit is further configured to: semi-statically notify the UE by using the high layer signaling to determine the indication information of the first PMI.
  • the UE determines the second PMI by using the second PMI of the last feedback;
  • the UE determines the first PMI using the first PMI that was last fed back.
  • the trigger signaling when the trigger signaling does not include indication information for instructing the UE to feed back the second PMI, the trigger signaling further includes, by using the high-level signaling semi-static notification, the UE to determine the second PMI. a second PMI indicating the information or the last feedback to determine the second PMI; or,
  • the trigger signaling When the trigger signaling does not include indication information for instructing the UE to feed back the first PMI, the trigger signaling further includes a first PMI indicating that the UE uses the high-level signaling semi-static notification or the first PMI of the last feedback. To determine the first PMI.
  • a feedback device for channel state information CSI provided by the embodiment of the present application includes:
  • the receiving unit 21 is configured to receive trigger signaling of CSI feedback sent by the base station, where the method is used to indicate that the UE is Not feeding back the indication information of the first precoding matrix indication information PMI and/or the second PMI;
  • the feedback unit 22 is configured to perform CSI feedback according to the trigger signaling.
  • the trigger signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI; or
  • the trigger signaling includes indication information for indicating that the UE does not feed back the first PMI and the second PMI.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • the trigger signaling specifically includes indication information indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining a first PMI;
  • the feedback unit Specifically, the first PMI is determined according to the indication information of the first PMI, and the second PMI is determined according to the first PMI, and the second PMI is fed back to the base station;
  • the triggering signaling includes indication information for indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining the second PMI, where the feedback unit is specifically configured to: And determining, according to the indication information of the second PMI, the second PMI, and determining the first PMI according to the second PMI, and feeding back the first PMI to the base station.
  • the feedback unit is specifically configured to: according to a preset second PMI, or the base station passes a high-level letter The semi-statically informing the UE to determine the indication information of the second PMI, or the second PMI that was last reported, determining the first PMI, and feeding back the first PMI to the base station;
  • the feedback unit is specifically configured to: according to the preset first PMI, or the base station passes the high layer signaling half
  • the static notification UE is used to determine the indication information of the first PMI, or the first PMI that was last reported, determine the second PMI, and feed back the second PMI to the base station.
  • the feedback control device of another channel state information CSI includes: a processor 500, configured to read a program in the memory 520, and perform the following process:
  • the CSI includes at least a first precoding matrix indication information PMI and a second PMI, where the first PMI and the second PMI correspond to the same precoding matrix;
  • the control transceiver 510 sends trigger signaling of CSI feedback to the UE, including indication information indicating whether the UE feeds back the first PMI and/or the second PMI.
  • the trigger signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI;
  • the trigger signaling includes indication information for indicating that the UE does not feed back the first PMI and the second PMI.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • the triggering signaling includes indication information for indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining the first PMI; or
  • the trigger signaling includes indication information for indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining a second PMI.
  • the processor 500 is further configured to: control the transceiver 510 to semi-statically notify the UE for determining by using the high layer signaling.
  • the indication information of the second PMI or,
  • the processor 500 is further configured to: control the transceiver 510 to semi-statically notify the UE by using the high layer signaling to determine the first PMI. Instructions.
  • the UE determines the second PMI by using the second PMI of the last feedback;
  • the UE determines the first PMI using the first PMI that was last fed back.
  • the trigger signaling when the trigger signaling does not include indication information for instructing the UE to feed back the second PMI, the trigger signaling further includes, by using the high-level signaling semi-static notification, the UE to determine the second PMI. a second PMI indicating the information or the last feedback to determine the second PMI; or,
  • the trigger signaling When the trigger signaling does not include indication information for instructing the UE to feed back the first PMI, the trigger signaling further includes a first PMI indicating that the UE uses the high-level signaling semi-static notification or the first PMI of the last feedback. To determine the first PMI.
  • the transceiver 510 is configured to receive and transmit data under the control of the processor 500.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 500 and various circuits of memory represented by memory 520.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 510 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.
  • FIG. 6 another channel state information CSI feedback provided by the embodiment of the present application is provided.
  • Devices including:
  • the processor 600 is configured to read a program in the memory 620 and perform the following process:
  • the control transceiver 610 receives the trigger signaling of the CSI feedback sent by the base station, and includes indication information for indicating whether the UE feeds back the first precoding matrix indication information PMI and/or the second PMI; and according to the trigger signaling, the control Transceiver 610 performs CSI feedback.
  • the triggering signaling includes indication information for instructing the UE to simultaneously feed back the first PMI and the second PMI; or the triggering signaling includes, in the trigger signaling, indicating that the UE does not feed back the first PMI and the first Two PMI instructions.
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using the same bit;
  • the indication information used in the trigger signaling to indicate that the UE feeds back the first PMI and the indication information indicating the feedback of the second PMI are encoded using different bits.
  • the trigger signaling specifically includes indication information for indicating that the UE does not feed back the first PMI but feeds back the second PMI, and indication information for determining the first PMI;
  • the controller 600 determines the first PMI according to the indication information of the first PMI, and determines the second PMI according to the first PMI, and controls the transceiver 610 to feed back the second PMI to the base station;
  • the trigger signaling includes indication information for indicating that the UE does not feed back the second PMI but feeds back the first PMI, and indication information for determining the second PMI; the processor 600 is configured according to the first The indication information of the second PMI determines the second PMI, and determines the first PMI according to the second PMI, and controls the transceiver 610 to feed back the first PMI to the base station.
  • the processor 600 performs a semi-static notification according to the second PMI set in advance, or the base station passes the high layer signaling. Determining, by the UE, the indication information of the second PMI, or the second PMI that was last reported, determining the first PMI, and controlling the transceiver 610 to feed back the first PMI to the base station;
  • the processor 600 is configured to notify the UE according to the first PMI set in advance, or the base station is semi-statically notified by the high layer signaling. Determining the indication information of the first PMI, or the first PMI reported last time, determining the second PMI, and controlling the transceiver 610 to feed back the second PMI to the base station.
  • the transceiver 610 is configured to receive and transmit data under the control of the processor 600.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 600 and various circuits of memory represented by memory 620.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 610 It can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 630 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 can store data used by the processor 600 in performing operations.
  • the embodiment of the present application provides aperiodic CSI feedback and its control (or trigger) scheme under a large-scale antenna system, which can trigger the first PMI and the second PMI separately.
  • feedback of. A portion of the CSI's assumptions (such as the first PMI) may be provided by the eNB to feed back another portion of the CSI (such as the second PMI). Therefore, the problem that the existing system does not support the CSI feedback under the large-scale antenna system is solved, and the complexity of the feedback CSI of the UE is not high, and the flexibility of the control feedback CSI of the base station is improved.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本申请公开了一种信道状态信息的反馈及其控制方法及装置，用以实现大规模天线系统下的CSI反馈并且UE可以仅需反馈部分PMI信息，使得UE反馈CSI的复杂度降低，网络侧控制UE反馈CSI的灵活性更好。本申请提供的一种信道状态信息CSI的反馈控制方法，包括：基站确定需要控制用户设备UE反馈CSI，所述CSI至少包括第一预编码矩阵指示信息PMI和第二PMI，所述第一PMI和所述第二PMI对应同一预编码矩阵；所述基站向该UE发送CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI和/或第二PMI的指示信息。

Description

一种信道状态信息的反馈及其控制方法及装置
本申请要求在2015年6月4日提交中国专利局、申请号为201510301165.7、发明名称为“一种信道状态信息的反馈及其控制方法及装置”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领域，尤其涉及一种信道状态信息的反馈及其控制方法及装置。
背景技术
频分双工(Frequency Division Duplex，FDD)系统中要实现三维的波束赋形或预编码，需要依靠用户设备(User Equipment，UE)上报的信道状态信息(Channel State Information，CSI)。在现有长期演进(Long Term Evolution，LTE)系统中定义了2、4、8天线端口的信道反馈，通过码本方式进行信道反馈。网络和UE首先定义一个共有的码本(codebook)，每个codebook里面包含一组可能的预编码矩阵(precoding matrix)，也称为码字(codeword)，每一个码字是一个UE可以反馈的赋形矩阵(precoding matrix)，UE从codebook选取最佳codeword，然后反馈其索引(index)，称为预编码矩阵指示(Precoding Matrix Indicator，PMI)。伴随着PMI的反馈，UE同时反馈PMI对应的秩指示(Rank Indicator，RI)，等同于可以支持的码流的数量，和在RI/PMI下的信道质量指示(Channel Quality Indicator，CQI)。反馈的PMI对应的precoding matrix的大小为Nt x RI，这里Nt是基站天线的数量(比如2,4,8)。
CSI的反馈可以是周期(periodic)方式的也可以是非周期(aperiodic)方式的。在aperiodic方式下，eNB通过动态信令调度UE上报反馈的CSI。LTE中aperiodic方式通过上行链路授权(UL grant)实现。eNB在调度物理上行链路共享信道(Physical Uplink Shared Channel，PUSCH)进行上行数据传输的时候，发送一个下行控制信息(Downlink Control Information，DCI)用于指示上行链路授权(uplink grant)，通知UE上行传输的参数，比如传输的带宽，传输的频域资源(如物理资源块(Physical Resource Blocks，PRB)传输功率等等。在DCI中可以有一部分控制信令用来通知UE是否在传输PUSCH上行数据的时候一起反馈CSI。现有系统DCI中用1-bit触发，即采用一个比特位来触发，反映UE是否反馈CSI，如果1-bit＝0，UE不反馈CSI。如果1-bit＝1，UE将CSI(包括RI、PMI和CQI)和PUSCH数据一起反馈。现有系统同时也支持只反馈CSI而不传输上行数据的行为，此时UE在PUSCH传输中反馈CSI，但是PUSCH中不包括上行数据。这里PMI是一个预编码矩阵指示，代表一个码本(codebook)中的码字(codeword)，其对应的天线 数量可以是2、4或8。
大规模天线系统现在正在新一代无线系统中进行研究，也称为3D-多输入多输出(3D-Multiple Input Multiple Output，3D-MIMO)。3D-MIMO的一个重要特性是基站侧天线数目非常多而且可以是二维的天线结构，例如：16、32、64天线等，称为大规模天线系统。
但是，现有技术中还没有给出大规模天线系统下的CSI反馈方案。
发明内容
本申请实施例提供了一种信道状态信息的反馈及其控制方法及装置，用以实现大规模天线系统下的CSI反馈，并且UE可以仅需反馈部分PMI信息，使得UE反馈CSI的复杂度降低，网络侧控制UE反馈CSI的灵活性更好。
本申请实施例提供的一种信道状态信息CSI的反馈控制方法，包括：
基站确定需要控制用户设备UE反馈CSI，所述CSI至少包括第一预编码矩阵指示信息PMI和第二PMI，所述第一PMI和所述第二PMI对应同一预编码矩阵；
所述基站向该UE发送CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI和/或第二PMI的指示信息。
通过该方法，基站确定需要控制用户设备UE反馈CSI，所述CSI至少包括第一预编码矩阵指示信息PMI和第二PMI，所述第一PMI和所述第二PMI对应同一预编码矩阵，所述基站向该UE发送CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI和/或第二PMI的指示信息，从而实现大规模天线系统下的CSI反馈，并且使得在大规模天线系统下，UE可以仅需反馈部分PMI信息，使得反馈CSI的复杂度较低，并且使得网络侧控制UE反馈CSI的灵活性更好。
较佳地，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
较佳地，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
较佳地，所述触发信令中包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定第一PMI的指示信息；或者，
所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定第二PMI的指示信息。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，该方法 还包括：所述基站通过高层信令半静态通知UE用于确定第二PMI的指示信息；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，该方法还包括：所述基站通过高层信令半静态通知UE用于确定该第一PMI的指示信息。
较佳地，当所述触发信令不包括用于指示UE反馈第二PMI的指示信息时，所述UE使用最近一次反馈的第二PMI确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述UE使用最近一次反馈的第一PMI确定第一PMI。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的第二PMI或最近一次反馈的第二PMI来确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的用于确定第一PMI的指示信息或最近一次反馈的第一PMI来确定第一PMI。
本申请实施例提供的一种信道状态信息CSI的反馈方法，包括：
用户设备UE接收基站发送的CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一预编码矩阵指示信息PMI和/或第二PMI的指示信息；
所述UE根据所述触发信令，进行CSI反馈。
通过该方法，用户设备UE接收基站发送的CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一预编码矩阵指示信息PMI和/或第二PMI的指示信息；所述UE根据所述触发信令，进行CSI反馈，从而实现大规模天线系统下的CSI反馈，并且，当基站发送的CSI反馈的触发信令中包括用于指示该UE是否反馈第一预编码矩阵指示信息PMI或第二PMI的指示信息时，UE仅需反馈部分维度天线的CSI，使得反馈CSI的复杂度较低，并且网络侧控制UE反馈CSI的灵活性更好。
较佳地，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
较佳地，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
较佳地，当所述天线阵列是由M根垂直维度的天线和N根水平维度的天线构成时，预先设置有包括M个码字的第一码本和包括N个码字第二码本；
所述触发信令中包括用于指示该UE反馈垂直维度的天线的第一预编码矩阵指示PMI的指示信息或水平维度的天线的第二PMI的指示信息，其中，所述第一PMI对应第一码 本中的码字，所述第二PMI对应第二码本中的码字。
较佳地，所述触发信令中具体包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定该第一PMI的指示信息；所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据该第一PMI的指示信息，确定第一PMI，并根据第一PMI确定第二PMI，并将该第二PMI反馈给所述基站；
或者，
所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定该第二PMI的指示信息；所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据该第二PMI的指示信息，确定第二PMI，并根据第二PMI确定第一PMI，并将该第一PMI反馈给所述基站。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据预先设置的第二PMI，或者所述基站通过高层信令半静态通知UE用于确定该第二PMI的指示信息，或者最近一次上报的第二PMI，确定第一PMI，并将该第一PMI反馈给所述基站；
或者，当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据预先设置的第一PMI，或者所述基站通过高层信令半静态通知UE用于确定该第一PMI的指示信息，或者最近一次上报的第一PMI，确定第二PMI，并将该第二PMI反馈给所述基站。
本申请实施例提供的一种信道状态信息CSI的反馈控制装置，包括：
第一单元，用于确定需要控制用户设备UE反馈CSI，所述CSI至少包括第一预编码矩阵指示信息PMI和第二PMI，所述第一PMI和所述第二PMI对应同一预编码矩阵；
第二单元，用于向该UE发送CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI和/或第二PMI的指示信息。
较佳地，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
较佳地，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
较佳地，所述触发信令中包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定第一PMI的指示信息；或者，
所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定第二PMI的指示信息。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述第二单元还用于：通过高层信令半静态通知UE用于确定第二PMI的指示信息；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述第二单元还用于：通过高层信令半静态通知UE用于确定该第一PMI的指示信息。
较佳地，当所述触发信令不包括用于指示UE反馈第二PMI的指示信息时，所述UE使用最近一次反馈的第二PMI确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述UE使用最近一次反馈的第一PMI确定第一PMI。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的用于确定第二PMI的指示信息或最近一次反馈的第二PMI来确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的第一PMI或最近一次反馈的第一PMI来确定第一PMI。
本申请实施例提供的一种信道状态信息CSI的反馈装置，包括：
接收单元，用于接收基站发送的CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一预编码矩阵指示信息PMI和/或第二PMI的指示信息；
反馈单元，用于根据所述触发信令，进行CSI反馈。
较佳地，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
较佳地，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
较佳地，所述触发信令中具体包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定第一PMI的指示信息；所述反馈单元，具体用于：根据该第一PMI的指示信息，确定第一PMI，并根据第一PMI确定第二PMI，并将该第二PMI反馈给所述基站；
或者，
所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定该第二PMI的指示信息；所述反馈单元，具体用于：根据该第二PMI的指示信息，确定第二PMI，并根据第二PMI确定第一PMI，并将该第一PMI反馈给所述基站。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述反馈单元，具体用于：根据预先设置的第二PMI，或者所述基站通过高层信令半静态通知UE用于确定该第二PMI的指示信息，或者最近一次上报的第二PMI，确定第一PMI，并将该第一PMI反馈给所述基站；
或者，当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述反馈单元，具体用于：根据预先设置的第一PMI，或者所述基站通过高层信令半静态通知UE用于确定该第一PMI的指示信息，或者最近一次上报的第一PMI，确定第二PMI，并将该第二PMI反馈给所述基站。
在网络侧，本申请实施例提供的另一种信道状态信息CSI的反馈控制装置，包括：
处理器，用于读取存储器中的程序，执行下列过程：
确定需要控制用户设备UE反馈CSI，所述CSI至少包括第一预编码矩阵指示信息PMI和第二PMI，所述第一PMI和所述第二PMI对应同一预编码矩阵；
控制收发机向该UE发送CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI和/或第二PMI的指示信息。
较佳地，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
较佳地，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
较佳地，所述触发信令中包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定第一PMI的指示信息；或者，
所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定第二PMI的指示信息。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述处理器还用于：控制收发机通过高层信令半静态通知UE用于确定该第二PMI的指示信息；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述处理器还用于：控制收发机通过高层信令半静态通知UE用于确定该第一PMI的指示信息。
较佳地，当所述触发信令不包括用于指示UE反馈第二PMI的指示信息时，所述UE使用最近一次反馈的第二PMI确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述UE使用最近一次反馈的第一PMI确定第一PMI。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的用于确定第二PMI的指示信息或最近一次反馈的第二PMI来确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的第一PMI或最近一次反馈的第一PMI来确定第一PMI。
相应地，在UE侧，本申请实施例提供的另一种信道状态信息CSI的反馈装置，包括：
处理器，用于读取存储器中的程序，执行下列过程：
控制收发机接收基站发送的CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一预编码矩阵指示信息PMI和/或第二PMI的指示信息；根据所述触发信令，控制收发机进行CSI反馈。
较佳地，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
较佳地，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
较佳地，所述触发信令中具体包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定该第一PMI的指示信息；所述处理器根据该第一PMI的指示信息，确定第一PMI，并根据第一PMI确定第二PMI，并控制收发机将该第二PMI反馈给所述基站；
或者，
所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定该第二PMI的指示信息；所述处理器根据该第二PMI的指示信息，确定第二PMI，并根据第二PMI确定第一PMI，并控制收发机将该第一PMI反馈给所述基站。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述处理器根据预先设置的第二PMI，或者所述基站通过高层信令半静态通知UE用于确定该第二PMI的指示信息，或者最近一次上报的第二PMI，确定第一PMI，并控制收发机将该第一PMI反馈给所述基站；
或者，当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述处理器根据预先设置的第一PMI，或者所述基站通过高层信令半静态通知UE用于确定该第一PMI的指示信息，或者最近一次上报的第一PMI，确定第二PMI，并控制收发机将该第二 PMI反馈给所述基站。
附图说明
图1为本申请实施例提供的一种信道状态信息的反馈控制方法的流程示意图；
图2为本申请实施例提供的一种信道状态信息的反馈方法的流程示意图；
图3为本申请实施例提供的一种信道状态信息的反馈控制装置的结构示意图；
图4为本申请实施例提供的一种信道状态信息的反馈装置的结构示意图；
图5为本申请实施例提供的另一种信道状态信息的反馈控制装置的结构示意图；
图6为本申请实施例提供的另一种信道状态信息的反馈装置的结构示意图。
具体实施方式
本申请实施例提供了一种信道状态信息的反馈及其控制方法及装置，用以实现大规模天线系统下的CSI反馈，并且使得UE反馈CSI的复杂度较低，网络侧控制UE反馈CSI的灵活性更好。
随着天线技术的发展，业界已出现能够对每个阵子独立控制的有源天线。采用这种设计，天线阵列会由现在的两维平面的水平排列，增强到三维立体空间内的水平和垂直排列。这种天线阵列的方式，使得波束同时在水平方向和垂直方向的动态调整成为可能，不仅仅局限在传统天线系统中的水平方向的波束动态调整。
大规模天线系统的波束赋形/预编码需要依靠UE上报的信道状态信息。一般来说，大规模天线系统的反馈码字可对应两个PMI，各自对应两个低维度码本中的码字。比如基站一共有32天线，垂直维度4根，水平维度8根。系统定义两个低维度codebook，第一codebook为4Tx码本，对应垂直维度。第二codebook为8Tx码本，对应水平维度。为了反馈32Tx的预编码(precoder)，UE反馈第一PMI和第二PMI，其中，第一PMI对应于第一codebook中的4Tx precoder W1，第二PMI对应第二codebook中的8Tx precoder W2，则整体的32Tx precoder W可以写为:
Figure PCTCN2016082989-appb-000001
其中，公式一中所示的整体32Tx码本W和W1、W2的对应关系只是一个例子，也可以有别的对应关系，不再赘述。
但是，如果eNB使用1-bit触发CSI反馈，则每一次触发反馈的时候，UE需要同时反馈第一PMI和第二PMI。这会导致两个缺点：
一、UE的复杂度很高。例如，第一codebook中有16个precoder，第二codebook中有128个precoder，如果每次反馈W的时候UE必须总是反馈第一PMI和第二PMI，则UE需要从16x128＝2018种(第一PMI，第二PMI)组合中选取最佳的组合。因此，UE复 杂度很高。
二、eNB调度灵活性很小。eNB没有办法控制UE反馈的内容。eNB如果不需要新的第一PMI反馈，而只需要第二PMI的反馈，则没有办法通过1-bit触发实现，因为1-bit触发总是同时触发第一PMI和第二PMI反馈。在现实系统中存在一些情况，eNB只需要一个PMI的反馈，而不需要另一个PMI的反馈。比如一种可能性，PMI1对应垂直维度的赋形信息，因为UE在垂直维度的位置变化非常缓慢，甚至基本不变化，则PMI1的变化也非常缓慢，eNB不需要UE经常反馈PMI1的信息，在某一次PMI1反馈之后，eNB可以在很长一段时间内只需要UE反馈PMI2信息，来反映水平方向的信道。另外一种可能，PMI1对应的垂直维度状态信息可以由eNB在上行测量得到而不需要UE反馈，eNB只需要UE反馈PMI2信息。所以大规模天线系统的反馈需要支持eNB只触发一部分PMI反馈而不触发另外一部分PMI反馈的机制。
需要说明的是，本申请实施例中，在第一PMI和第二PMI至少有一个反馈的情况下，CQI也可以同时反馈。
本申请实施例考虑到UE的复杂度很高，例如，第一codebook中有16个precoder，第二codebook中有128个precoder，如果每次反馈W的时候UE必须总是反馈第一PMI和第二PMI，则UE需要从16x128＝2018种(第一PMI，第二PMI)组合中选取最佳的组合。因此，UE复杂度很高。而如果UE只反馈第二PMI，则UE只需要进行128的码字的选择。同理如果UE只需要反馈第一PMI，则UE只需要进行16码字的选择。因此，为了降低UE复杂度和提高基站灵活性，本申请实施例提出网络侧可以通知UE反馈一部分天线的CSI，甚至也可以通知UE不反馈CSI，当然也可以反馈所有的CSI。
参见图1，在网络侧，本申请实施例提供的一种信道状态信息CSI的反馈控制方法，包括：
S101、基站确定需要控制用户设备UE反馈CSI，所述CSI至少包括第一预编码矩阵指示信息PMI和第二PMI，所述第一PMI和所述第二PMI对应同一预编码矩阵；
本申请实施例提供的技术方案，应用场景是大规模天线系统，信道中的赋形矩阵信息由UE反馈的第一PMI和第二PMI共同决定。比如第一PMI对应于水平维度的一个码本，第二PMI对应垂直维度一个码本，两个PMI对应的赋形矩阵的Kronecker乘积反映了大规模天线系统整体的赋形矩阵信息(这只是一种可能，也存在其他赋形矩阵和第一PMI/第二PMI的对应关系的可能性)。
S102、所述基站向该UE发送CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI和/或第二PMI的指示信息。
通过该方法实现了大规模天线系统下的CSI反馈，并且，若所述基站向该UE发送CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI或第二PMI的指示信息时， 使得UE可以仅反馈部分CSI，例如对应天线阵列的部分CSI维度的信息。通过该方法，基站确定需要控制用户设备UE反馈CSI时，向该UE发送CSI反馈的触发信令，其中包括用于指示该UE反馈部分CSI的指示信息，从而使得在大规模天线系统下，UE仅需计算并反馈部分CSI而不是全部CSI，比如对应于部分维度天线的CSI，使得反馈CSI的复杂度较低，并且使得网络侧控制UE反馈CSI的灵活性更好。
本申请实施例中，仍然假设3D-MIMO码字对应于两个PMI，即第一PMI和第二PMI，因此本申请实施例中，支持以下四种触发状态：
状态一：触发UE上报第一PMI和第二PMI；
状态二：触发UE仅上报第一PMI；
状态三：触发UE仅上报第二PMI；
状态四：不触发UE反馈任何PMI。
比如，系统可以用信令通知UE一个第一PMI的假设，UE根据该第一PMI的假设来计算反馈第二PMI和CQI。系统通知的第一PMI可以对应于垂直维度的第一PMI，可以通过信道互易性得到，或通过之前的第一PMI的反馈得到。这样，如果系统通知UE了第一PMI，则UE可以使用公式一计算第二PMI。因为UE只需要查找第二PMI的码本，复杂度大大降低。
其中，第一PMI和第二PMI的触发可以在信令中分开编码或者是整体编码，下面假设第一codebook包括M个codeword，第二codebook包括N个codeword。其中，第一PMI对应第一codebook中的codeword，第二PMI对应第二codebook中的codeword。
因此，较佳地，当所述天线阵列是由Nt1根垂直维度的天线和Nt2根水平维度的天线构成时，预先设置有包括M个码字的第一码本和包括N个码字第二码本，即预先在基站侧和UE侧约定好包括M个码字的第一码本和包括N个码字第二码本；较佳的，第一码本可对应于垂直维度的赋形矩阵信息，第二码本可对应于水平维度的赋形矩阵信息；
所述触发信令中包括用于指示该UE反馈第一预编码矩阵指示PMI的指示信息(例如对应于垂直维度的天线)和/或第二PMI的指示信息(例如对应于水平维度天线)，其中，所述第一PMI对应第一码本中的码字，所述第二PMI对应第二码本中的码字。
例如，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
或者，例如，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
或者，例如，网络侧可以将部分PMI通知给UE，并通知UE反馈另一部分的PMI， 即所述触发信令中具体包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定该第一PMI的指示信息；或者，所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定该第二PMI的指示信息。
网络侧通知给UE的部分PMI也可以通过高层信令半静态地通知给UE，因此，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，该方法还包括：所述基站通过高层信令半静态通知UE用于确定该第二PMI的指示信息；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，该方法还包括：所述基站通过高层信令半静态通知UE用于确定该第一PMI的指示信息。
较佳地，当所述触发信令不包括用于指示UE反馈第二PMI的指示信息时，所述UE使用最近一次反馈的第二PMI确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述UE使用最近一次反馈的第一PMI确定第一PMI。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的用于确定第二PMI的指示信息或最近一次反馈的第二PMI来确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的用于确定第一PMI的指示信息或最近一次反馈的第一PMI来确定第一PMI。
比如eNB可以通过上下行信道互易性测量上行信道的垂直维度赋形信息(等价于第一PMI)，然后将第一PMI通过高层信令通知给UE，UE以此第一PMI作为假设测量上报第二PMI。另外一种实现是eNB触发UE自己测量第一PMI，根据此第一PMI检测第二PMI。在某些场景可能需要在两种状态之间动态切换。比如在UE速度变化较大的情况下，UE的速率可高可低。如果UE速率较低，则eNB测量的第一PMI精确度可以接受，eNB可以允许UE使用高层信令通知的第一PMI。如果在某一时间点UE速率较高，eNB预期自身测量第一PMI较差，可以选择UE使用UE测量的第一PMI作为基准。
相应地，在UE侧，参见图2，本申请实施例提供的一种信道状态信息CSI的反馈方法，包括：
S201、用户设备UE接收基站发送的CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI和/或第二PMI的指示信息，比如反馈天线阵列的部分维度天线的CSI的指示信息；
S202、所述UE根据所述触发信令，进行CSI反馈。
通过该方法，UE接收基站发送的CSI反馈的触发信令，其中包括用于指示该UE是否 反馈第一PMI和/或第二PMI(比如天线阵列的部分维度天线的CSI)的指示信息；所述UE根据所述触发信令，进行CSI反馈，从而使得在大规模天线系统下，UE可以仅需反馈部分CSI(比如部分维度天线的CSI)，使得反馈CSI的复杂度较低，并且网络侧控制UE反馈CSI的灵活性更好。
较佳地，当所述天线阵列是由Nt1根垂直维度的天线和Nt2根水平维度的天线构成时，预先设置有包括M个码字的第一码本和包括N个码字第二码本；
所述触发信令中包括用于指示该UE反馈第一预编码矩阵指示PMI的指示信息(例如对应垂直维度的天线的PMI信息)和/或第二PMI(例如对应水平维度的天线)的指示信息，其中，第一PMI对应第一codebook中的codeword，第二PMI对应第二codebook中的codeword。
较佳地，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
较佳地，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
较佳地，所述触发信令中具体包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定该第一PMI的指示信息；所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据该第一PMI的指示信息，确定第一PMI，并根据第一PMI确定第二PMI，并将该第二PMI反馈给所述基站；
或者，
所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定该第二PMI的指示信息；所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据该第二PMI的指示信息，确定第二PMI，并根据第二PMI确定第一PMI，并将该第一PMI反馈给所述基站。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据预先设置的第二PMI，或者所述基站通过高层信令半静态通知UE用于确定该第二PMI的指示信息，或者最近一次上报的第二PMI，确定第一PMI，并将该第一PMI反馈给所述基站；
或者，当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据预先设置的第一PMI，或者所述基站通过高层信令半静态通知UE用于确定该第一PMI的指示信息，或者最近一次上报的第一PMI，确定第二PMI，并将该第二PMI反馈给所述基站。
下面给出详细的解释说明。
在网络侧，基站在发送CSI反馈的触发信令时，可以将关于第一PMI和第二PMI的触发域分开编码，也可以联合编码。
关于第一PMI和第二PMI的触发域分开编码介绍如下：
该方法提供了最大的触发灵活性，但是会略微增加触发信令的开销(overhead)。以下以第一PMI为例子介绍方案。第二PMI可以以相同方案解决，不赘述。
关于第一PMI，可以有以下三种触发状态：
状态一:触发UE进行第一PMI的反馈。
状态二:不触发UE进行第一PMI的反馈。
状态三：系统通知第一PMI给UE，UE使用该第一PMI来计算第二PMI。其中，通知第一PMI的信令需占用多个比特(bits)。
其中，状态一和状态二可以用1-bit一起编码。状态三可以分开编码，也可以和状态一和/或状态二共同编码。
实用例一：
如下面的表一所示，如果系统不支持状态三，那么状态一和状态二可以用1bit通知UE。
第一PMI的1-bit触发(triggering)指示值 UE行为(assumption)
1-bit第一PMI trigger＝0 上报第一PMI
1-bit第二PMI trigger＝1 不上报第一PMI
表一
如上面的表一所示，即网络侧可以采用一个比特位通知UE上报第一PMI或者不上报第一PMI，例如，该比特位等于0时，表示通知UE上报第一PMI，该比特位等于1时，表示通知UE不上报第一PMI。
实用例二：
如果状态三，和状态一、状态二分开编码，则动态信令包括两个领域，一个是触发第一PMI是否上报(使用1-bit)，即状态一和状态二用下面的表二进行通知；另一个是系统用来将第一PMI通知UE，使用
Figure PCTCN2016082989-appb-000002
其中M是第一PMI的码本的大小，
Figure PCTCN2016082989-appb-000003
为向上取整函数，(比如M＝7时，
Figure PCTCN2016082989-appb-000004
)，即状态三用下面的表三进行通知。
第一PMI的1-bit触发(triggering)指示值 UE行为(assumption)
1-bit第一PMI trigger＝0 上报第一PMI
1-bit第二PMI trigger＝1 不上报第一PMI
表二
如上面的表二所示，即网络侧可以采用一个比特位通知UE上报第一PMI或者不上报第一PMI，例如，该比特位等于0时，表示通知UE上报第一PMI，该比特位等于1时，表示通知UE不上报第一PMI。
Figure PCTCN2016082989-appb-000005
表三
如上面的表三所示，即网络侧可以采用第一PMI的指示域将第一PMI通知UE。例如，该指示域的值等于0时，表示通知UE将第一codebook中的第一个预编码作为第一PMI，该指示域的值等于1时，表示通知UE将第一codebook中的第二个预编码作为第一PMI，以此类推，该指示域的值等于M-1时，表示通知UE将第一codebook中的第M个预编码矩阵作为第一PMI。其中，M为第一codebook中包括的codeword的个数。UE使用网络侧通知的第一PMI，计算并反馈第二PMI，第一PMI和第二PMI共同对应一个预编码矩阵对应整体的信道，例如公式一。
另外一种可能的调度方式见表三.A。此时包含状态通知UE计算并反馈第二PMI，比如表三.A中对应的状态M。如果此时网络没有调度UE反馈第一PMI(见表一)，也没有通过动态信令通知UE假设的第一PMI，而此时UE需要第一PMI来计算第二PMI，此时UE可以假设第一PMI为高层半静态信令通知的第一PMI，或者为最近一次反馈的第一PMI，或者是一个预设的固定的PMI。如果此时网络也调度UE反馈第一PMI(见表一)，UE可以使用反馈的第一PMI，计算第二PMI并反馈第二PMI。另外，也可以包括一个状态(状态M+1)，通知UE不反馈第二PMI。
Figure PCTCN2016082989-appb-000006
Figure PCTCN2016082989-appb-000007
表三.A
实用例三:
状态三也可以和状态一、状态二一起进行编码。如下面的表四所示：
Figure PCTCN2016082989-appb-000008
表四
如上面的表四所示，网络侧可以采用第一PMI的指示域(或称为触发域)将第一PMI通知UE。例如，该指示域的值等于0时，表示通知将第一codebook中的第一个预编码作为第一PMI，该指示域的值等于1时，表示通知UE将第一codebook中的第二个预编码作为第一PMI，以此类推，该指示域的值等于M-1时，表示通知UE将第一codebook中的第M个预编码矩阵作为第一PMI。其中，M为第一codebook中包括的codeword的个数。该指示域的值等于M时，表示触发UE上报第一PMI和第二PMI。该指示域的值等于M+1时，表示不触发UE上报第一PMI和第二PMI，UE不需要上报第一PMI和第二PMI。
如果UE被触发反馈第二PMI，不反馈第一PMI，系统也没有将第一PMI通知给UE，而UE需要知道第一PMI来计算第二PMI，那么UE可以采用预设的一个固定的第一PMI，或者采用由系统高层信令半静态通知给UE的第一PMI，或者UE使用最近一次上报的第一PMI，来计算第二PMI。
下面关于第一PMI和第二PMI的触发域联合编码进行介绍。
以下需要UE支持至少以下状态：
状态一：UE反馈第一PMI和第二PMI；
状态二：UE不反馈第一PMI，也不反馈第二PMI；
状态三：UE反馈第二PMI，不反馈第一PMI，UE使用一个eNB通知的第一PMI进行第二PMI的反馈。
如果状态三，和状态一、状态二分开编码，动态信令可以包括两个触发域，1-bit用来触发第一PMI和第二PMI反馈，如下面的表五所示；另外一个域的bit供系统通知UE关于第一PMI的假设，即将第一PMI通知给UE，如下面的表六所示：
第一PMI和第二PMI的1-bit触发域 UE行为(assumption)
1-bit＝0 上报第一PMI和第二PMI
1-bit＝1 不上报第一PMI和第二PMI
表五
如上面的表五所示，当第一PMI和第二PMI的1-bit触发域的值为0时，表示触发UE上报第一PMI和第二PMI；当第一PMI和第二PMI的1-bit触发域的值为1时，表示不触发UE上报第一PMI和第二PMI，即UE不上报第一PMI和第二PMI。即状态一和状态二用表五所示方式进行触发。
Figure PCTCN2016082989-appb-000009
Figure PCTCN2016082989-appb-000010
表六
如上面的表六所示，当第一PMI的1-bit指示域的值为0时，表示触发UE用第一codebook中的第一个预编码作为第一PMI，并且触发UE上报第二PMI；当第一PMI的1-bit指示域的值为1时，表示触发UE用第一codebook中的第二个预编码作为第一PMI，并且触发UE上报第二PMI；以此类推，当第一PMI的1-bit指示域的值为M-1时，表示触发UE用第一codebook中的第M个预编码作为第一PMI，并且触发UE上报第二PMI。
即状态三用表六所示方式进行触发。
如果状态三，和状态一、状态二一起编码，动态信令可以包括多个比特来进行触发，例如：
Figure PCTCN2016082989-appb-000011
表七
如上面的表七所示，当指示域(或触发域)的值为0时，表示触发UE用第一codebook中的第一个预编码作为第一PMI；当指示域(或触发域)的值为1时，表示触发UE用第一codebook中的第二个预编码作为第一PMI，以此类推，当指示域(或触发域)的值为M-1时，表示触发UE用第一codebook中的第M个预编码作为第一PMI，上报第二PMI。当指示域(或触发域)的值为M时，表示触发UE上报第一PMI和第二PMI，当指示域(或触发域)的值为M+1时，表示不触发UE上报第一PMI和第二PMI，即UE不上报第一PMI和第二PMI。
需要说明的是，上述的第一PMI和第二PMI可以交换使用。
与上述方法相对应地，参见图3，在网络侧，例如是基站，本申请实施例提供的一种 信道状态信息CSI的反馈控制装置，包括：
第一单元11，用于确定需要控制用户设备UE反馈CSI，所述CSI至少包括第一预编码矩阵指示信息PMI和第二PMI，所述第一PMI和所述第二PMI对应同一预编码矩阵；
第二单元12，用于向该UE发送CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI和/或第二PMI的指示信息。
较佳地，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，
所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
较佳地，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
较佳地，所述触发信令中包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定第一PMI的指示信息；或者，
所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定第二PMI的指示信息。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述第二单元还用于：通过高层信令半静态通知UE用于确定第二PMI的指示信息；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述第二单元还用于：通过高层信令半静态通知UE用于确定该第一PMI的指示信息。
较佳地，当所述触发信令不包括用于指示UE反馈第二PMI的指示信息时，所述UE使用最近一次反馈的第二PMI确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述UE使用最近一次反馈的第一PMI确定第一PMI。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的用于确定第二PMI的指示信息或最近一次反馈的第二PMI来确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的第一PMI或最近一次反馈的第一PMI来确定第一PMI。
相应地，在UE侧，参见图4，本申请实施例提供的一种信道状态信息CSI的反馈装置，包括：
接收单元21，用于接收基站发送的CSI反馈的触发信令，其中包括用于指示该UE是 否反馈第一预编码矩阵指示信息PMI和/或第二PMI的指示信息；
反馈单元22，用于根据所述触发信令，进行CSI反馈。
较佳地，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，
所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
较佳地，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
较佳地，所述触发信令中具体包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定第一PMI的指示信息；所述反馈单元，具体用于：根据该第一PMI的指示信息，确定第一PMI，并根据第一PMI确定第二PMI，并将该第二PMI反馈给所述基站；
或者，
所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定该第二PMI的指示信息；所述反馈单元，具体用于：根据该第二PMI的指示信息，确定第二PMI，并根据第二PMI确定第一PMI，并将该第一PMI反馈给所述基站。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述反馈单元，具体用于：根据预先设置的第二PMI，或者所述基站通过高层信令半静态通知UE用于确定该第二PMI的指示信息，或者最近一次上报的第二PMI，确定第一PMI，并将该第一PMI反馈给所述基站；
或者，当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述反馈单元，具体用于：根据预先设置的第一PMI，或者所述基站通过高层信令半静态通知UE用于确定该第一PMI的指示信息，或者最近一次上报的第一PMI，确定第二PMI，并将该第二PMI反馈给所述基站。
参见图5，在网络侧，本申请实施例提供的另一种信道状态信息CSI的反馈控制装置，包括：处理器500，用于读取存储器520中的程序，执行下列过程：
确定需要控制用户设备UE反馈CSI，所述CSI至少包括第一预编码矩阵指示信息PMI和第二PMI，所述第一PMI和所述第二PMI对应同一预编码矩阵；
控制收发机510向该UE发送CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI和/或第二PMI的指示信息。
较佳地，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息； 或者，所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
较佳地，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
较佳地，所述触发信令中包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定第一PMI的指示信息；或者，
所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定第二PMI的指示信息。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述处理器500还用于：控制收发机510通过高层信令半静态通知UE用于确定该第二PMI的指示信息；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述处理器500还用于：控制收发机510通过高层信令半静态通知UE用于确定该第一PMI的指示信息。
较佳地，当所述触发信令不包括用于指示UE反馈第二PMI的指示信息时，所述UE使用最近一次反馈的第二PMI确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述UE使用最近一次反馈的第一PMI确定第一PMI。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的用于确定第二PMI的指示信息或最近一次反馈的第二PMI来确定第二PMI；或者，
当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的第一PMI或最近一次反馈的第一PMI来确定第一PMI。
收发机510，用于在处理器500的控制下接收和发送数据。
其中，在图5中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器500代表的一个或多个处理器和存储器520代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机510可以是多个元件，即包括发送机和收发机，提供用于在传输介质上与各种其他装置通信的单元。处理器500负责管理总线架构和通常的处理，存储器520可以存储处理器500在执行操作时所使用的数据。
相应地，在UE侧，参见图6，本申请实施例提供的另一种信道状态信息CSI的反馈 装置，包括：
处理器600，用于读取存储器620中的程序，执行下列过程：
控制收发机610接收基站发送的CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一预编码矩阵指示信息PMI和/或第二PMI的指示信息；根据所述触发信令，控制收发机610进行CSI反馈。
较佳地，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
较佳地，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
较佳地，所述触发信令中具体包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定该第一PMI的指示信息；所述处理器600根据该第一PMI的指示信息，确定第一PMI，并根据第一PMI确定第二PMI，并控制收发机610将该第二PMI反馈给所述基站；
或者，
所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定该第二PMI的指示信息；所述处理器600根据该第二PMI的指示信息，确定第二PMI，并根据第二PMI确定第一PMI，并控制收发机610将该第一PMI反馈给所述基站。
较佳地，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述处理器600根据预先设置的第二PMI，或者所述基站通过高层信令半静态通知UE用于确定该第二PMI的指示信息，或者最近一次上报的第二PMI，确定第一PMI，并控制收发机610将该第一PMI反馈给所述基站；
或者，当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述处理器600根据预先设置的第一PMI，或者所述基站通过高层信令半静态通知UE用于确定该第一PMI的指示信息，或者最近一次上报的第一PMI，确定第二PMI，并控制收发机610将该第二PMI反馈给所述基站。
收发机610，用于在处理器600的控制下接收和发送数据。
其中，在图6中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器600代表的一个或多个处理器和存储器620代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机610 可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备，用户接口630还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器600负责管理总线架构和通常的处理，存储器620可以存储处理器600在执行操作时所使用的数据。
综上所述，本申请实施例中提供了一种大规模天线系统下的非周期性的(aperiodic)CSI反馈及其控制(或者称为触发)方案，可以分开触发第一PMI和第二PMI的反馈。可以由eNB提供一部分CSI的假设(比如第一PMI)，以反馈另外一部分CSI(比如第二PMI)。从而解决了现有系统不支持大规模天线系统下的CSI反馈的问题，并且使得UE反馈CSI的复杂度不会很高，提高了基站的控制反馈CSI的灵活性。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (21)

  1. 一种信道状态信息CSI的反馈控制方法，其特征在于，该方法包括：
    基站确定需要控制用户设备UE反馈CSI，所述CSI至少包括第一预编码矩阵指示信息PMI和第二PMI，所述第一PMI和所述第二PMI对应同一预编码矩阵；
    所述基站向该UE发送CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI和/或第二PMI的指示信息。
  2. 根据权利要求1所述方法，其特征在于，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，
    所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
  3. 根据权利要求2所述方法，其特征在于，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
    所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
  4. 根据权利要求1述的方法，其特征在于，所述触发信令中包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定第一PMI的指示信息；或者，
    所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定第二PMI的指示信息。
  5. 根据权利要求1所述的方法，其特征在于，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，该方法还包括：所述基站通过高层信令半静态通知UE用于确定第二PMI的指示信息；或者，
    当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，该方法还包括：所述基站通过高层信令半静态通知UE用于确定该第一PMI的指示信息。
  6. 根据权利要求1所述的方法，其特征在于，当所述触发信令不包括用于指示UE反馈第二PMI的指示信息时，所述基站控制所述UE使用最近一次反馈的第二PMI确定第二PMI；或者，
    当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述基站控制所述UE使用最近一次反馈的第一PMI确定第一PMI。
  7. 根据权利要求1所述的方法，其特征在于，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的用于确定第二PMI的指示信息或最近一次反馈的第二PMI来确定第二PMI；或者，
    当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的用于确定第一PMI的指示信息或最近一次反馈的 第一PMI来确定第一PMI。
  8. 一种信道状态信息CSI的反馈方法，其特征在于，该方法包括：
    用户设备UE接收基站发送的CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一预编码矩阵指示信息PMI和/或第二PMI的指示信息；
    所述UE根据所述触发信令，进行CSI反馈。
  9. 根据权利要求8所述的方法，其特征在于，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，
    所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
  10. 根据权利要求9所述的方法，其特征在于，所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用相同的比特位编码；或者，
    所述触发信令中用于指示UE反馈第一PMI的指示信息和指示反馈第二PMI的指示信息，使用不同的比特位编码。
  11. 根据权利要求8所述的方法，其特征在于，所述触发信令中具体包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定第一PMI的指示信息；所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据该第一PMI的指示信息，确定第一PMI，并根据第一PMI确定第二PMI，并将该第二PMI反馈给所述基站；
    或者，
    所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定第二PMI的指示信息；所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据该第二PMI的指示信息，确定第二PMI，并根据第二PMI确定第一PMI，并将该第一PMI反馈给所述基站。
  12. 根据权利要求8所述的方法，其特征在于，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据预先设置的第二PMI，或者所述基站通过高层信令半静态通知UE用于确定该第二PMI的指示信息，或者最近一次上报的第二PMI，确定第一PMI，并将该第一PMI反馈给所述基站；
    或者，当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述UE根据所述触发信令，进行CSI反馈，具体包括：所述UE根据预先设置的第一PMI，或者所述基站通过高层信令半静态通知UE用于确定该第一PMI的指示信息，或者最近一次上报的第一PMI，确定第二PMI，并将该第二PMI反馈给所述基站。
  13. 一种信道状态信息CSI的反馈控制装置，其特征在于，包括：
    第一单元，用于确定需要控制用户设备UE反馈CSI，所述CSI至少包括第一预编码 矩阵指示信息PMI和第二PMI，所述第一PMI和所述第二PMI对应同一预编码矩阵；
    第二单元，用于向该UE发送CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一PMI和/或第二PMI的指示信息。
  14. 根据权利要求13所述的装置，其特征在于，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，
    所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
  15. 根据权利要求13所述的装置，其特征在于，所述触发信令中包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定第一PMI的指示信息；或者，
    所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定第二PMI的指示信息。
  16. 根据权利要求13所述的装置，其特征在于，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述第二单元还用于：通过高层信令半静态通知UE用于确定第二PMI的指示信息；或者，
    当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述第二单元还用于：通过高层信令半静态通知UE用于确定该第一PMI的指示信息。
  17. 根据权利要求13所述的装置，其特征在于，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的第二PMI或最近一次反馈的第二PMI来确定第二PMI；或者，
    当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述触发信令还包括指示UE使用高层信令半静态通知的用于确定第一PMI的指示信息或最近一次反馈的第一PMI来确定第一PMI。
  18. 一种信道状态信息CSI的反馈装置，其特征在于，包括：
    接收单元，用于接收基站发送的CSI反馈的触发信令，其中包括用于指示该UE是否反馈第一预编码矩阵指示信息PMI和/或第二PMI的指示信息；
    反馈单元，用于根据所述触发信令，进行CSI反馈。
  19. 根据权利要求18所述的装置，其特征在于，所述触发信令中包括用于指示UE同时反馈第一PMI和第二PMI的指示信息；或者，
    所述触发信令中包括用于指示UE不反馈所述第一PMI和第二PMI的指示信息。
  20. 根据权利要求18所述的装置，其特征在于，所述触发信令中具体包括用于指示该UE不反馈所述第一PMI但反馈所述第二PMI的指示信息，以及用于确定第一PMI的指示信息；所述反馈单元，具体用于：根据该第一PMI的指示信息，确定第一PMI，并根据第一PMI确定第二PMI，并将该第二PMI反馈给所述基站；
    或者，
    所述触发信令中包括用于指示该UE不反馈所述第二PMI但反馈所述第一PMI的指示信息，以及用于确定该第二PMI的指示信息；所述反馈单元，具体用于：根据该第二PMI的指示信息，确定第二PMI，并根据第二PMI确定第一PMI，并将该第一PMI反馈给所述基站。
  21. 根据权利要求18所述的装置，其特征在于，当所述触发信令中不包括用于指示UE反馈第二PMI的指示信息时，所述反馈单元，具体用于：根据预先设置的第二PMI，或者所述基站通过高层信令半静态通知UE用于确定该第二PMI的指示信息，或者是最近一次上报的第二PMI，确定第一PMI，并将该第一PMI反馈给所述基站；
    或者，当所述触发信令中不包括用于指示UE反馈第一PMI的指示信息时，所述反馈单元，具体用于：根据预先设置的第一PMI，或者所述基站通过高层信令半静态通知UE用于确定该第一PMI的指示信息，或者是最近一次上报的第一PMI，确定第二PMI，并将该第二PMI反馈给所述基站。
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