WO2012028023A1 - 信道状态信息的反馈方法及终端 - Google Patents

信道状态信息的反馈方法及终端 Download PDF

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Publication number
WO2012028023A1
WO2012028023A1 PCT/CN2011/076330 CN2011076330W WO2012028023A1 WO 2012028023 A1 WO2012028023 A1 WO 2012028023A1 CN 2011076330 W CN2011076330 W CN 2011076330W WO 2012028023 A1 WO2012028023 A1 WO 2012028023A1
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WIPO (PCT)
Prior art keywords
indication information
report type
channel state
information
codeword
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PCT/CN2011/076330
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English (en)
French (fr)
Inventor
李儒岳
徐俊
陈艺戬
张峻峰
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中兴通讯股份有限公司
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Publication of WO2012028023A1 publication Critical patent/WO2012028023A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028Formatting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0619Diversity 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
    • H04B7/0621Feedback content
    • H04B7/0626Channel coefficients, e.g. channel state information [CSI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity 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
    • H04B7/0615Diversity 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
    • H04B7/0619Diversity 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
    • H04B7/0636Feedback format
    • H04B7/0645Variable feedback
    • H04B7/065Variable contents, e.g. long-term or short-short
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/02Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0014Three-dimensional division
    • H04L5/0023Time-frequency-space
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057Physical resource allocation for CQI
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path

Definitions

  • the present invention relates to the field of mobile communication technologies, and in particular to a method and a terminal for feeding back channel state information.
  • BACKGROUND In a wireless communication system, a transmitting end and a receiving end use a plurality of antennas to obtain a higher rate in a spatial multiplexing manner.
  • an enhanced technology is that the receiving end feeds back the channel state information to the transmitting end, and the transmitting end uses the transmitting precoding technology according to the obtained channel state information, which can greatly improve the transmission performance.
  • channel feature vector information can be directly used for precoding; for multiple user multiple input multiple output (Multiple User MIMO, MU-MIMO), More accurate channel state information is needed.
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • the feedback of channel state information is mainly a feedback method using a simple single codebook, and the transmission precoding of MIMO
  • the performance of the technology depends on the accuracy of the codebook feedback.
  • the transmitting end and the receiving end jointly save or generate the codebook in real time (the transmitting end and the receiving end are the same).
  • the receiving end selects a codeword that best matches the actual channel H from the codebook space according to a certain criterion, and numbers the codeword. i (codeword number) is fed back to the transmitter.
  • the codeword sequence number is referred to as a Precoding Matrix Indicator (PMI) in the codebook.ong.
  • PMI Precoding Matrix Indicator
  • the transmitting end finds the corresponding precoding codeword according to the sequence number ⁇ , thereby obtaining corresponding channel state information.
  • the codebook space can be further divided into codebooks corresponding to a plurality of layers ( Rank), and each of the Ranks corresponds to a plurality of codewords to quantize the channel under the Rank. Precoding of feature vectors Matrix. Since the number of Rank and non-zero feature vectors of the channel are equal, in general, when the Rank is N, the code word will have N columns. Therefore, the codebook space can be divided into multiple subcodebooks according to the difference of Rank, and the codebook shown in Table 1 is divided into a plurality of subcodebooks by Rank. Table 1
  • the codewords to be stored in Rank> l are in the form of a matrix.
  • the codebook in the LTE protocol is a feedback method for the codebook quantization.
  • the LTE downlink 4 transmit antenna codebook is shown in Table 2.
  • the codebook of the LTE downlink 4 transmit antennas is shown in the table. In fact, the LTE precoding is performed.
  • the codebook and channel state information quantified codebooks have the same meaning. In the following, for the sake of uniformity, the vector can also be viewed as a matrix of dimension 1.
  • W n I - 2u n u n H ju n H u n
  • I is a unit matrix, representing the j-th column vector of the matrix W k .
  • W k ( J ") denotes a matrix composed of the first, j 2 , ... J n columns of the matrix W k , and represents a conjugate transposed matrix of u n ; wherein n represents a sequence number and takes a value of 0 to 15.
  • the feature vector information of the channel which is often referred to as precoding information. Since the codebook is used to feed back the precoding information, it is often referred to as a precoding matrix indication.
  • the minimum feedback unit of channel state information is subband (Subband), which is composed of thousands of resource blocks (RBs), each RB is composed of A plurality of resource elements (REs) are formed; RE is a minimum unit of time-frequency resources in LTE.
  • Subband subband
  • RE resource elements
  • the corresponding object may be a sub-band, or multiple sub-bands, and a broadband ( Wideband ).
  • PMI information Characterized feature vector information, recommended to the base station for downlink precoding technology.
  • CQI Channel Quality Information
  • the feedback methods of PMI/RI/CQI include the following two types: Periodic feedback, mainly feedback on the Physical Uplink Control Channel (PUCCH); aperiodic feedback, feedback on the Physical Uplink Shared Channel (PUSCH).
  • the periodic feedback carried on the PUCCH is one of the most commonly used feedback, and the periodic feedback must be configured.
  • Aperiodic feedback is an occasional trigger type feedback, which is an auxiliary feedback method, which is a feedback for improving accuracy, and its overhead is generally large.
  • Type 1 feedback subband CQI of the subband selected by the UE
  • Type 2 CQI and PMI information for feedback broadband
  • Type 3 feedback RI information
  • Type 4 Only feedback the wideband CQI.
  • the terminal supporting the closed-loop spatial multiplexing mode involves the first three types of the above feedback types.
  • a feedback mode of Type 2 and Type 3 in LTE is shown in Table 3.
  • the RI information of the Report Type 3 is independently coded. For example, in 4Tx, 2bit 4 states indicate that the RI is 1, 2, 3 or 4.
  • Report Type 2 contains 4 bits of PMI information, indicating a certain codeword in the LTE codebook, and also contains CQI information.
  • RI 1, it is 1 CQI, and when RI > 1, it is 2 CQI.
  • one CQI is 4 bits, when two CQIs are fed back, the second CQI uses a differential technique, and based on the first CQI difference, it is 3 bits.
  • the maximum is l ibit, which is also the maximum supportable overhead of CSI information on PUCCH feedback.
  • LTE-A Long Term Evolution Advanced
  • Technology mainly to enhance the feedback accuracy of the codebook, the technology can improve the evolution of international mobile communications
  • the precoding/feedback structure of a subband consists of two matrices. 2) Each of the two matrices belongs to a separate codebook.
  • the codebook is made up of base stations and
  • Codebooks can vary at different times and on different subbands.
  • a matrix represents the properties of a wideband or long-term channel. Another matrix represents the properties of the determined frequency band or short-term channel.
  • the matrix codebook used is represented in the form of a finite number of matrix sets, and for the UE and the base station, each matrix is known. It can be seen from the above that the feedback of the channel state information proposes a structure based on the dual codebook, which can be further described as follows: For one subband or multiple joint subbands that need to feed back channel state information, the UE feeds back at least to the base station. Two PMI information, PMI1 and PMI2, respectively, where PMI1 corresponds to a codeword W1 in one codebook C1, and PMI2 corresponds to a codeword W2 in another codebook C2. The base station has the same information of C1 and C2.
  • the corresponding codewords W1 and W2 are found from the corresponding codebooks C1 and C2, and the channel state is obtained according to the agreed function rule F (Wl, W2).
  • W1 - indicates wideband channel state information
  • W1 or W1 combined with fixed value W2 can completely represent current spatial channel state information
  • W2 usually indicates channel state information of the subband, and also indicates channel state information of broadband, W2 itself
  • the current spatial channel state information cannot be independently represented and exists depending on W1.
  • the channel state information to be transmitted is RI, PMI1 and PMI2, and CQI.
  • the related art transmits these channel state information by feeding back Type 2 and Type 3, for example, using the following method:
  • Report Type3 from 2bit to 3bit;
  • Report Type2 Contains all PMI information and broadband CQI; The Report Type 2 of this method needs to transmit PMI1+PMI2+CQI, which exceeds the maximum overhead supported by the PUCCH. Therefore, PUCCH expansion is required. Or, when you type Type2 and Type3, increase the force. A 4 report type Report Type is used to transmit the above channel status information, but this will increase the overhead. It can be seen that the method for feeding back channel state information in the related art cannot meet the requirements of the LTE-A system, and needs to increase signaling overhead or expand the PUCCH.
  • a primary object of the present invention is to provide a method and a terminal for feeding back channel state information to at least solve the problem of increasing signaling overhead or expanding PUCCH required for the feedback channel state information.
  • a method for feeding back channel state information includes: comparing, by a terminal, a rank RI of a channel and a size of a set value M; and determining, by the terminal, a report type of the plurality of feedback channel state information according to the comparison result The terminal uses the determined report type to feed back channel status information. The reporting type of the plurality of feedback channel state information is determined by the terminal according to the comparison result.
  • the terminal uses the codeword W1 and the codeword W2 in the dual codebook structure to jointly represent the channel state information of the subband or the broadband.
  • the terminal determines a plurality of four types of feedback channel state information, wherein the report type of the indication information of the feedback RI further includes subband or wideband specified channel state information, and the subband or wideband channel state information is used with the codeword W1.
  • the indication information associated with the code word W2 is indicated.
  • the determining, by the terminal, the plurality of report type feedback channel state information includes: the terminal determining to use the report type 1, the report type 2, and the report type three feedback channel state information; wherein, the report type one includes the indication information of the RI and the set of the codeword W2 set partition
  • the attribution indication information includes: indication information of one codeword W1 and channel quality indication information CQI of n1 channels; 4 advertisement type 3 includes indication information and n2 of the set of codewords W2 corresponding to the set attribution indication information CQI of the channel; nl and n2 are integers greater than or equal to 1.
  • the determining, by the terminal, the plurality of report type feedback channel state information includes: the terminal determining to use the report type 1, the report type 2, and the report type three feedback channel state information; wherein, the report type one includes the indication information of the RI and the set of the codeword W2 set partition
  • the attribution type information includes: indication information of one codeword W1, indication information in a set of codewords W2 corresponding to at least one set of home indication information, and CQI of n1 channels; report type three includes n2 sets of attribution indication information corresponding The indication information in the set of codewords W2 and the CQI of n3 channels; nl and n2 are integers greater than or equal to 1, and n3 is an integer greater than or equal to zero.
  • the determining, by the terminal, the plurality of report type feedback channel state information includes: the terminal determines the use report type 1, the report type 2, and the report type three feedback channel state information; wherein, the report type 1 includes the indication information of the RI, and the codeword W1 is divided into a second set of home indication information that is divided into a set of home indication information and a codeword W2 set; the report type two includes indication information in the set of codewords W1 corresponding to the first set of home indication information, and at least one second set of home indication information corresponds to The indication information in the set of codewords W2 and the CQI of the n1 channels; the report type three includes the indication information in the set of the codewords W2 corresponding to the n2 second set of home indication information and the CQI of the n3 channels; nl and n2 Is an integer greater than or equal to 1, and n3 is an integer greater than or equal to zero.
  • the determining, by the terminal, the plurality of report type feedback channel state information includes: the terminal determining to use the report type 1 and the report type 2 feedback channel state information; wherein, the report type 1 includes the indication information of the RI and the set attribution indication information of the codeword W2 set division;
  • the report type 2 includes the indication information of one code word W1, the indication information in the combination of the code words W2 corresponding to the at least one set attribution indication information, and the CQI of the n1 channels; wherein, nl is an integer greater than or equal to 1.
  • the determining, by the terminal, the plurality of report type feedback channel state information includes: the terminal determining to use the report type 1 and the report type 2 feedback channel state information; wherein, the report type 1 includes the indication information of the RI, and the first set attribution indication of the codeword W1 set division The information and the code group W2 are divided into the second set of home indication information; the report type 2 includes the indication information in the set of the codewords W1 corresponding to the first set of the home indication information, and the codewords W2 corresponding to the at least one second set of the home indication information.
  • the foregoing terminal determines, according to the comparison result, the report types of the multiple feedback channel state information, including: when the RI is greater than M, the terminal uses a single codebook structure, and one codeword W represents the channel state information of the subband or the broadband; the terminal determines the usage report.
  • the type 1 and the report type 2 are feedback channel state information.
  • the report type 1 includes the indication information of the RI.
  • the report type 2 includes the indication information of the specified part or all of the codewords W.
  • the reporting type of the multiple feedback channel state information is determined by the terminal according to the comparison result.
  • the terminal uses the dual codebook structure, and one W1 and the fixed value W2 jointly represent the channel state information of the subband or the broadband;
  • the terminal determines to use the report type 1 and the report type 2 feedback channel state information.
  • the report type 1 includes the indication information of the RI.
  • the report type 2 includes an indication of specifying part or all of the codeword W1. information.
  • the indication information in the above report type 1 is combined with the coding.
  • a terminal including: a comparison module, configured to compare a rank RI of a channel with a size of a set value M; and a report determining module configured to determine a plurality of feedbacks according to a comparison result of the comparison module a report type of channel state information; a feedback module configured to use the report type feedback channel state information determined by the report determination module.
  • the foregoing report determining module includes: a first characterization unit, configured to use the codeword W1 and the codeword W2 in the dual codebook structure to jointly represent the channel state information of the subband or the broadband when the RI is less than or equal to M; Set to determine a plurality of report type feedback channel state information, where the report type of the indication information of the feedback RI further includes subband or wideband specified channel state information, and the subband or wideband channel state information is used with the codeword W1 and the code.
  • the indication information associated with the word W2 is indicated.
  • the first determining unit includes: a first determining subunit, configured to determine a usage report type 1, a report type 2, and a report type three feedback channel state information; wherein, the report type one includes the indication information of the RI and the codeword W2 set division Set the attribution indication information; the report type 2 includes the indication information of one codeword W1 and the channel quality indication information CQI of the n1 channels; the report type 3 includes the indication information and the n2 channels in the set of the codewords W2 corresponding to the set attribution indication information.
  • CQI; nl and n2 are integers greater than or equal to 1.
  • the first determining unit includes: a second determining subunit, configured to determine to use the report type 1, the report type 2, and the report type three feedback channel state information; wherein, the report type one includes the indication information of the RI and the codeword W2 set partition
  • the aggregation type indication information includes: indication information of one codeword W1, indication information in a set of codewords W2 corresponding to at least one set of home indication information, and CQI of n1 channels; report type three includes n2 sets of attribution indications The indication information in the set of codewords W2 corresponding to the information and the CQI of n3 channels; nl and n2 are integers greater than or equal to 1, and n3 is an integer greater than or equal to zero.
  • the first determining unit includes: a third determining subunit, configured to determine the use report type 1, the report type 2, and the report type three feedback channel state information; wherein, the report type one includes the indication information of the RI, and the code word W1 is divided into a first set of home indication information and a second set of home indication information that are divided by the codeword W2; the report type 2 includes indication information in the set of the codewords W1 corresponding to the first set of home indication information, and at least one second set of attribution indication information The indication information in the set of corresponding codewords W2 and the CQI of the n1 channels; the report type three includes n2 second set attribution indication letters The indication information in the set of codewords W2 corresponding to the information and the CQI of the n3 channels; nl and n2 are integers greater than or equal to 1, and n3 is an integer greater than or equal to zero.
  • the foregoing first determining unit includes: a fourth determining subunit, configured to determine to use the type 1 and the report type 2 feedback channel state information; wherein, the report type 1 includes the indication information of the RI and the set of the codeword W2 set partition
  • the indication information includes: indication information of one code word W1, indication information in a combination of code words W2 corresponding to at least one set of home indication information, and CQI of n1 channels; wherein, nl is an integer greater than or equal to 1.
  • the first determining unit includes: a fifth determining subunit, configured to determine a usage report type 1 and a report type 2 feedback channel state information; where the report type 1 includes the indication information of the RI, and the first set of the codeword W1 set partitioning belongs to a second set of home indication information that is divided into the indication information and the codeword W2; the report type 2 includes the indication information in the set of the codewords W1 corresponding to the first set of the home indication information, and the codeword corresponding to the at least one second set of the attribution indication information The indication information in the set of W2 and the CQI of n1 channels; wherein, nl is an integer greater than or equal to 1.
  • the foregoing report determining module includes: a second characterization unit, configured to use a single codebook structure when the RI is greater than M, and a codeword W to characterize subband or wideband channel state information; and a second determining unit configured to determine a usage report
  • the type 1 and the report type 2 are feedback channel state information.
  • the report type 1 includes the indication information of the RI.
  • the report type 2 includes the indication information of the specified part or all of the codewords W.
  • the foregoing report determining module includes: a third characterization unit, configured to use a dual codebook structure when the RI is greater than M, and a W1 and a fixed value W2 jointly represent the channel state information of the subband or the broadband; the third determining unit, setting In order to determine the use of the report type 1 and the report type 2 feedback channel state information; wherein the report type 1 includes the indication information of the RI, when the indication information of the feedback code word W1 is needed, the advertisement type 2 includes the specified part or all of the code words W1. Instructions.
  • the channel state information can be fully fed back to the base station by using the overhead byte in the report type without exceeding the maximum overhead allowed by the PUCCH, and the relevant feedback channel is solved.
  • FIG. 1 is a flow chart of a feedback method of channel state information according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of feedback content of channel state information according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic diagram of feedback content of channel state information according to Embodiment 3 of the present invention
  • FIG. 5 is a schematic diagram of feedback content of channel state information according to Embodiment 4 of the present invention
  • FIG. 7 is a flowchart of a method for feeding back channel state information according to Embodiment 6 of the present invention
  • FIG. 8 is a structural block diagram of a terminal according to an embodiment of the present invention
  • It is a block diagram of a specific structure of a terminal in the embodiment of the present invention.
  • Step S102 The terminal compares the rank RI of the channel with the size of the set value M;
  • Step S 104 The terminal determines, according to the result of the foregoing comparison, a report type of the multiple feedback channel state information.
  • the terminal uses the codeword W1 and the codeword W2 in the dual codebook structure to jointly represent the channel state of the subband or the broadband.
  • the information is: the terminal determines a plurality of four types of feedback channel state information, wherein the four types of indication information of the feedback RI include subbands or
  • the specified channel state information of the wideband, the channel state information of the subband or the wideband in this embodiment is represented by the indication information associated with the codeword W1 and the codeword W2.
  • This embodiment may be represented by the following methods:
  • the specified channel state information of this embodiment may be set home indication information, for example: which part of the codebook in which the codeword indication information of W2 is located.
  • the terminal determines to use the report type one, the report type 2, and the report type three feedback channel state information; where, the report type one includes the indication information of the RI and the set attribution indication information of the codeword W2 set division; the report type two includes one The indication information of the codeword W1 and the channel quality indication information CQI of the n1 channels; the report type 3 includes the indication information in the set of the codewords W2 corresponding to the set attribution indication information and the CQI of the n2 channels; nl and n2 are greater than or equal to 1 The integer.
  • the terminal determines to use the report type one, the report type 2, and the report type three feedback channel state information; where, the report type one includes the indication information of the RI and the set attribution indication information of the codeword W2 set division; the report type two includes one The indication information of the codeword W1, the indication information in the set of the codewords W2 corresponding to the at least one set of the home indication information, and the CQI of the n1 channels; the report type 3 includes the set of the codewords W2 corresponding to the n2 sets of the home indication information.
  • the indication information and the CQI of n3 channels; nl and n2 are integers greater than or equal to 1, and n3 is an integer greater than or equal to zero.
  • the third mode determines, by using the report type 1, the report type 2, and the report type three feedback channel state information, where the report type 1 includes the indication information of the RI, the first set of the home indication information of the codeword W1 set partition, and the codeword W2.
  • the report type 2 includes the indication information in the set of the codewords W1 corresponding to the first set of the home indication information, and the indication in the set of the codewords W2 corresponding to the at least one second set of the attribution indication information Information and CQI of n1 channels;
  • 4 report type 3 includes indication information in a set of codewords W2 corresponding to n2 second set attribution indication information and CQI of n3 channels;
  • nl and n2 are integers greater than or equal to 1, N3 is an integer greater than or equal to zero.
  • the fourth mode terminal determines to use the report type 1 and the report type 2 feedback channel state information; wherein, the report type 1 includes the indication information of the RI and the set attribution indication information of the codeword W2 set division; the report type Two indication information including one code word W1, indication information in a combination of code words W2 corresponding to at least one set of home indication information, and CQI of n1 channels; wherein, nl is an integer greater than or equal to 1.
  • the fifth mode determines, by using the report type 1 and the report type 2 feedback channel state information, where the report type includes the indication information of the RI, the first set of the home indication information of the codeword W1 set partition, and the first division of the codeword W2 set.
  • the report type 2 includes indication information in the set of the codewords W1 corresponding to the first set of home indication information, indication information in the set of the codewords W2 corresponding to the at least one second set of home indication information, and n1 CQI of the channel; where nl is an integer greater than or equal to 1.
  • the terminal may determine the type of the advertisement in the following manner: The terminal uses 1 codeword W to characterize the channel state information of the subband or the broadband, or the terminal uses a fixed matrix and the codeword W to represent the subtitle.
  • Step S106 The terminal feeds back channel state information using the determined report type.
  • the terminal in this embodiment may be a device supporting a closed loop spatial multiplexing mode.
  • the channel state information can be fully fed back to the base station by using the overhead byte in the report type without exceeding the maximum overhead allowed by the PUCCH, and the related feedback channel state is solved.
  • the problem of increasing signaling overhead or expanding PUCCH required in information technology improves the speed of feeding back channel state information to a base station.
  • Embodiment 1 As shown in FIG. 2, in a mode supporting closed-loop spatial multiplexing, a user equipment uses at least three report types (Report Type) feedback channels ⁇ !
  • Report Type A includes The joint indication information of the rank RI of the channel and the set division of a codeword W2;
  • Report Type B includes an indication information of W1 and n1 channel quality indication information CQI;
  • Report Type C contains n2 sets of another codeword W2 The indication information and the n3 channel quality indication information CQI; wherein the set indication information of one codeword W2 in the Report Type A and the indication information of any other W2 set in the Report Type C may collectively indicate a codeword W2; nl and n2 are positive integers greater than or equal to 1, and n3 is a positive integer greater than or equal to zero.
  • the user equipment uses 1 codeword W to indicate the channel state information of the subband or the broadband and feeds back the indication information of the codeword W to the base station or does not feed back the codeword information; or, the user equipment uses the codeword.
  • the Report Type A includes the indication information of the rank RI of the information indicating channel
  • the Report Type B information includes indication information or indication information of part or all of the codewords W
  • Report Type A When the rank RI of the channel is greater than M, the Report Type A does not include the indication information of the codeword W, or the Report Type A further includes the indication information of the partial codeword W, or the Report Type A further includes the indication information of the W1.
  • Report Type B also includes at least one Channel Quality Indicator (CQI) information;
  • the rank RI of the channel in Report Type A and the indication information of a W2 set are jointly encoded.
  • the joint indication information in the Report Type A may indicate a W2 codeword set in the codebook C2
  • the indication information of W2 in the Report Type B may uniquely indicate a W2 code in the W2 codeword set. word.
  • the number of ports on which the terminal currently transmits antennas is 4, and the types of reports used by the terminal to feed back channel status information are as follows:
  • Report Type A is a report of PUCCH, including indication information of ml bit RI and codeword set division indication information of 1 bit W2 (also referred to as set attribution indication information), and 1-bit W2 codeword set division indication information All W2 codewords can be divided into two codeword sets, one The antenna corresponding to the codeword set is a ULA (Uniform Linear Array) case, and the antenna corresponding to the other codeword set is a case of dual polarization, where ml is a positive integer greater than or equal to 1.
  • ULA Uniform Linear Array
  • Report Type B is also a PUCCH report that includes a W1 indication and a thousand CQI.
  • the codebook of W1 is the Release 8 codebook, which can be indicated by 4 bits, and W1 is a broadband information.
  • CQI is also a wideband CQI. When there is only one codeword stream, there is only one CQI. When there are two codeword streams, there are two CQIs.
  • Report Type C is also a PUCCH 4 message, including the indication information of W2 in the W2 codeword set specified by Report Type A, occupying 2 bits, W2 is a subband information; there is also a BP (Back Propagation, reverse) Propagation)
  • the neutron band position indication information occupies 2 bits; when there are two codeword streams, there are two CQIs, which require 4 bits and 3 bits, respectively.
  • W1 is an NtxR matrix, selected from Cl.
  • Report Type A a 1-bit W2 codeword set partitioning indication can be used for all
  • the W2 codeword is divided into two codeword sets ⁇ C 2 ,. ,..., C 2 , 3 ⁇ and ⁇ C 2 , 4 , ..., C 2 , 7 ⁇ , a codeword set
  • the corresponding antenna of ⁇ C 2 ,o,..., C 2 , 3 ⁇ is the case of ULA (Uniform Linear Array), another set of code words ⁇ C 2 , 4 ,..., C 2 , 7 ⁇
  • the corresponding antenna is a case of dual polarization, where ml is a positive integer greater than or equal to 1.
  • Report Type C includes the indication information of W2 in the W2 codeword set specified by Report Type A, which occupies 2 bits.
  • the W2 related indication information (set attribution indication information) of the Report Type A indicates whether the first half codeword or the second half codeword should be selected, and the W2 related indication information of the Report Type C indicates that the first half of the codeword or the second half of the codeword is W2, comprehensive two parts of information can completely determine the value of W2.
  • Embodiment 2 As shown in FIG. 3, in a mode supporting closed-loop spatial multiplexing, a user equipment uses at least three report types (Report Type) feedback channels ⁇ !
  • Report Type A includes the indication information of the joint RI of the channel and the joint coding of a codeword W2
  • the Report Type B contains a W1 indication, a W2
  • the Report Type C includes n2 other codewords W2 set partitioning indication information and n3 channel quality indication information CQI; wherein, one of the Report Type A codewords W2
  • the set indication information and the indication information of any other W2 set in the Report Type C may collectively uniquely indicate one codeword W2; nl and n2 are positive integers greater than or equal to 1, and n3 is an integer greater than or equal to zero
  • the user equipment uses 1 codeword W to indicate the channel state information of the subband or the broadband and feeds back the indication information of the codeword W to the base station or does not feed back the codeword information; or, the user equipment uses The code word W1 and the fixed value W2 jointly represent the channel state information of the subband or the wideband, and feed back the indication information of the codeword W1 to the base station or the feedback codeword information; the Report Type A includes the indication information of the rank RI of the information indication channel.
  • the Report Type A does not include the indication information of the codeword W, or the Report Type A further includes the indication information of the partial codeword W, or the Report Type A further includes the indication information of the W1.
  • Report Type B also includes at least one Channel Quality Indicator (CQI) information; the rank RI of the channel in Report Type A and the indication information of a W2 set are jointly encoded.
  • CQI Channel Quality Indicator
  • the rank RI of the channel in Report Type A and the indication information of a W2 set are jointly encoded.
  • the rank of the channel is less than or equal to M
  • the joint indication information in the Report Type A may indicate a W2 codeword set in the codebook C2
  • the indication information of W2 in the Report Type B may uniquely indicate a W2 code in the W2 codeword set. word.
  • the number of ports on which the terminal currently transmits antennas is 4, and the types of reports used by the terminal to feed back channel status information are as follows:
  • Report Type A is a report of PUCCH, including indication information of ml bit RI and codeword set division indication information of 1 bit W2, and 1 bit W2 codeword set division indication information can divide all W2 code words into two
  • the codeword set, the antenna corresponding to one codeword set is the case of ULA, and the antenna corresponding to the other codeword set is dual-polarized, where ml is a positive integer greater than or equal to 1.
  • Report Type B is also a PUCCH report that includes a W1 indication and a thousand CQI.
  • the codebook of W1 is the Release 8 codebook, which can be indicated by 4 bits, and W1 is a broadband information.
  • CQI is also a wideband CQI. When there is only one codeword stream, there is only one CQI. When there are two codeword streams, there are two CQIs.
  • the fourth report further includes indication information of another W2 codeword set division, which can uniquely indicate a W2 codeword in the set of W2 indicated by Report Type A, occupying 2 bits, and W2 is a broadband information. .
  • Report Type C is also a PUCCH report, including another W2 code word set indication information, occupying 2 bits, W2 is a sub-band information; there is also a BP neutron band position indication information, occupying 2 bits; When there are two codeword streams, there are two CQIs, which require 4 bits and 3 bits, respectively.
  • Embodiment 3 As shown in FIG. 4, in a mode supporting closed-loop spatial multiplexing, a user equipment uses at least three report types (Report Type) feedback channels ⁇ !
  • Report Type A includes Joint indication information of a channel RI, a codeword W2 set partition, and a codeword W1 set partition (ie, the joint indication information includes three parts: RI indication information, W2 set attribution indication information, and a set of W1) STATUS indication information);
  • Report Type B includes another type of codeword W1 set partitioning indication information, a W2 indication information, and n1 channel quality indication information CQI;
  • Report Type C includes n2 other codewords W2 set partitioned The indication information and the n3 channel quality indication information CQI; wherein the set indication information of one codeword W2 in the Report Type A and the indication information of any other W2 set
  • the user equipment uses 1 codeword W to indicate the channel state information of the subband or the broadband and feeds back the indication information of the codeword W to the base station or does not feed back the codeword information; or, the user equipment uses the codeword.
  • the Report Type A includes the indication information of the rank RI of the information indicating channel
  • the Report Type B includes indication information or indication information specifying part or all of the codewords W
  • the Report Type A does not include the indication information of the codeword W, or the Report Type A further includes the indication information of the partial codeword W, or the Report Type A further includes the indication information of the W1.
  • Report Type B also includes at least one Channel Quality Indicator (CQI) information; the rank RI of the channel in Report Type A and the indication information of a W2 set are jointly encoded.
  • CQI Channel Quality Indicator
  • the rank RI of the channel in Report Type A and the indication information of a W2 set are jointly encoded.
  • the joint indication information in the Report Type A may indicate a W1 codeword set in the codebook C1
  • the indication information of W1 in the Report Type B may uniquely indicate a W1 code in the W1 codeword set. word.
  • the joint indication information in the Report Type A may indicate a W2 codeword set in the codebook C2
  • the indication information of W2 in the Report Type B may uniquely indicate a W2 code in the W2 codeword set. word.
  • the number of ports on which the terminal currently transmits antennas is 4, and the types of reports used by the terminal to feed back channel status information are as follows:
  • Report Type A is a report of PUCCH, including indication information of ml bit RI and codeword set division indication information of 1 bit W2, and 1 bit W2 codeword set division indication information can divide all W2 code words into two The codeword set, the antenna corresponding to one codeword set is the case of ULA, and the antenna corresponding to the other codeword set is dual-polarized. Different from Embodiment 2, this report further includes a m2 bit W1 codeword set division indication information, where ml and m2 are integers greater than or equal to 1.
  • Report Type B is also a PUCCH 4 message, including an indication of W1 in a set of m3 bits and if there are thousands of CQIs, the W1 indication information in the set can uniquely indicate a W1 in the set of W1 indicated by Report Type A.
  • Codeword The codebook of W1 is a Release 8 codebook, which can be indicated by 4 bits, and W1 is a broadband information.
  • CQI is also a wideband CQI. When there is only one codeword stream, there is only one CQI. When there are two codeword streams, there are two CQIs.
  • this report further includes indication information of another W2 codeword set division, which can uniquely indicate a W2 codeword in the set of W2 indicated by Report Type A, occupying 2 bits, and W2 is a broadband information.
  • Report Type C is also a PUCCH report, including another W2 code word set indication information, occupying 2 bits, W2 is a sub-band information; there is also a BP neutron band position indication information, occupying 2 bits;
  • there are two codeword streams there are two CQIs, which require 4 bits and 3 bits, respectively.
  • Embodiment 4 As shown in FIG.
  • the report type used by the user equipment in this embodiment to feed back channel state information is the same as that in Embodiment 2 except that there is no Report Type C, and details are not described herein.
  • Embodiment 5 As shown in FIG. 6, the report type used by the user equipment of the present embodiment to feed back channel state information is the same as that of Embodiment 3 except that there is no Report Type C, and details are not described herein.
  • Embodiment 6 As shown in FIG. 7, a flowchart of a method for feeding back channel state information of a report type in the foregoing embodiment is used for a terminal, and the method includes the following steps: Step S702: The terminal measures a downlink pilot to obtain a downlink channel state.
  • Step S704 The terminal calculates RI, WI, W2, and CQI according to the channel state information, or calculates RI, W, and CQI;
  • Step S706 The terminal feeds back WI, W2, and CQI on the PUCCH; the terminal feeds back WI, W2, and CQI At the time, the report type provided in the above embodiment is used, and will not be described in detail here.
  • Step S708 The base station receives WI, W2, and CQI on the PUCCH to obtain new channel state information.
  • FIG. 8 is a structural block diagram of a terminal according to an embodiment of the present invention.
  • the terminal includes: a comparison module 82 configured to compare a rank RI of a channel with a size of a set value M; a report determining module 84, and a comparing module 82
  • the connection is set to determine a report type of the plurality of feedback channel state information according to the comparison result of the comparison module 82.
  • the feedback module 86 is connected to the report determination module 84 and configured to use the report type feedback channel state information determined by the report determination module 84.
  • the report determining module 84 includes: a first characterization unit 842 configured to use the codeword W1 and the codeword W2 in the dual codebook structure to jointly represent when the RI is less than or equal to M.
  • the sub-band or the broadband channel state information; the first determining unit 844 is connected to the first characterization unit 842, and is configured to determine a plurality of report types, wherein the four types of the indication information of the feedback RI are other than the indication information of the RI. , also contains the above sub
  • the specified channel state information with or with wideband, subband or wideband channel state information is represented by indication information associated with codeword W1 and codeword W2.
  • the specified channel state information of this embodiment may be set attribution indication information, for example: which part of the codebook in which the codeword indication information of W2 is located in the codeword W2; and the second characterization unit 846 is set to be when RI is greater than M, Using a single codebook structure, 1 codeword W is used to characterize the subband or wideband channel state information; a second determining unit 848 is coupled to the second characterization unit 846 and configured to determine the use report type 1 and report type 2 feedback channel state information.
  • the report type 1 includes the indication information of the RI.
  • the report type 2 includes the indication information of the specified part or all of the codewords W.
  • the fourth characterization unit 84 of the terminal includes the foregoing first characterization unit 842 and the first determining unit 844, and the following third characterization unit and third determining unit; wherein: the third characterization unit is configured to be When the RI is greater than the M, a dual codebook structure is used, and a W1 and a fixed value W2 jointly represent subband or wideband channel state information; and a third determining unit is configured to determine a usage report type 1 and a report type 2 The channel state information is fed back; wherein, the message type 1 includes the indication information of the RI, and when the indication information of the codeword W1 needs to be fed back, the report type 2 includes indication information specifying part or all of the codewords W1.
  • the first determining unit 844 may have multiple implementation manners, for example: In the first manner, the first determining unit 844 includes: a first determining subunit, configured to determine a usage report type 1, a report type 2, and a report type three feedback channel status. Information; wherein, the report type one includes the indication information of the RI and the set attribution indication information of the codeword W2 set division; the report type two includes the indication information of one codeword W1 and the channel quality indication information CQI of the nl channels; the report type three includes The indication information in the set of the codewords W2 corresponding to the set attribution indication information and the CQI of the n2 channels; n1 and n2 are integers greater than or equal to 1.
  • the first determining unit 844 includes: a second determining subunit, configured to determine to use the report type one, the report type two, and the report type three feedback channel state information; where the report type one includes the indication information and the code of the RI
  • the group W2 is divided into sets of attribution indication information;
  • the report type 2 includes indication information of one codeword W1, indication information in a set of codewords W2 corresponding to at least one set of home indication information, and CQI of n1 channels;
  • the advertisement type 3 includes the indication information in the set of the codewords W2 corresponding to the n2 sets of attribution indication information and the CQI of the n3 channels;
  • n1 and n2 are integers greater than or equal to 1, and n3 is an integer greater than or equal to 0.
  • the first determining unit 844 includes: a third determining subunit, configured to determine to use the report type 1, the report type 2, and the report type three feedback channel state information; wherein, the report type one includes the indication information and the code of the RI The first set of home indication information and the second set of home indication information of the codeword W2 set divided by the word W1; the report type 2 includes indication information in the set of the codewords W1 corresponding to the first set of home indication information, at least one The indication information in the set of codewords W2 corresponding to the two sets of attribution indication information and the CQI of the n1 channels; the report type 3 includes the indication information and the n3 channels in the set of the codewords W2 corresponding to the n2 second set of home indication information.
  • the first determining unit 844 includes: a fourth determining subunit, configured to determine to use the report type 1 and the report type 2 feedback channel state information; where, the report type 1 includes the indication information of the RI and the codeword W2 set partition
  • the set type indication information includes: indication information of one code word W1, indication information in a combination of code words W2 corresponding to at least one set of home indication information, and CQI of n1 channels; wherein, nl is greater than or equal to Integer.
  • the first determining unit 844 includes: a fifth determining subunit, configured to determine to use the report type 1 and the report type 2 feedback channel state information; where, the report type 1 includes the indication information of the RI, and the codeword W1 is divided into sets. The first set of attribution indication information and the second set of home indication information of the codeword W2 set division; the report type 2 includes indication information in the set of the codewords W1 corresponding to the first set of home indication information, and at least one second set of attribution indications The indication information in the set of codewords W2 corresponding to the information and the CQI of the n1 channels; wherein, nl is an integer greater than or equal to 1.
  • the indication information in the above-mentioned four types of advertisements may use joint coding.
  • the above RI takes values from 1 to N, where N is the minimum number of transmitting antennas of the base station and the number of receiving antennas of the terminal, and M is an integer greater than 1 and not greater than N.
  • the terminal in this embodiment may be a device supporting a closed loop spatial multiplexing mode.
  • the channel state information can be fully fed back to the base station by using the overhead byte in the report type without exceeding the maximum overhead allowed by the PUCCH, and the related feedback channel state is solved.
  • the problem of increasing signaling overhead or expanding PUCCH required in information technology improves the speed of feeding back channel state information to a base station.
  • the overhead of the indication information of the RI is relatively small, and the report type of the indication information of the feedback RI is characterized by an idle overhead, and the indication information in the report type that may exceed the maximum cost allowed by the PUCCH is divided. And transmitting the divided set attribution indication information to the base station together with the indication information of the RI, and feeding back the indication information in the set corresponding to the set attribution indication information in a subsequent report type according to the indication of the base station.
  • This method does not increase the overhead and does not need to expand the PUCCH to achieve the purpose of feedback channel status information.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

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Abstract

本发明公开了一种信道状态信息的反馈方法及终端。其中,该方法包括:终端比较信道的秩RI与设定值M的大小;该终端根据比较的结果确定多个反馈信道状态信息的报告类型;该终端使用确定的报告类型反馈信道状态信息。本发明解决了相关反馈信道状态信息技术中需要的增加信令开销或扩容PUCCH的问题,提高了向基站反馈信道状态信息的速度。

Description

信道状态信息的反馈方法及终端 技术领域 本发明涉及移动通信技术领域, 具体而言, 涉及一种信道状态信息的反馈 方法及终端。 背景技术 无线通信***中, 发送端和接收端釆取空间复用的方式使用多根天线来获 取更高的速率。 相对于一般的空间复用方法, 一种增强的技术是接收端将信道 状态信息反馈给发送端, 发送端根据获得的信道状态信息使用发射预编码技 术, 可以极大地提高传输性能。 对于单用户多输入多输出 ( Single User Multi-input Multi-output, SU-MIMO ), 可以直接使用信道特征矢量信息进行预 编码; 对于多用户多输入多输出 (Multiple User MIMO, MU-MIMO ), 需要比 较准确的信道状态信息。 在第三代合作伙伴计划( 3rd Generation Partnership Project, 3GPP )长期演 进 ( Long Term Evolution, LTE ) 中, 信道状态信息的反馈主要是利用较简单 的单一码本的反馈方法,而 MIMO的发射预编码技术的性能依赖于其中码本反 馈的准确度。 这里将基于码本的信道状态信息量化反馈的基本原理简要阐述如下: 假设有限反馈信道容量为 Sbps/Hz, 那么可用的码字的个数为 ^ = 2s个。 信道矩阵的特征矢量空间经过量化构成码本空间 = , … }。 发射端与接 收端共同保存或实时产生此码本 (发射端和接收端相同)。 对需要反馈信道 ^1 态信息 ( Channel State Information, CSI ) 的信道 H, 接收端才艮据一定准则从 码本空间 中选择一个与实际信道 H最匹配的码字 , 并将该码字 的序号 i (码字序号)反馈回发射端。 这里, 码字序号称为码本中的预编码矩阵指示符 ( Precoding Matrix Indicator, PMI )„ 发射端才艮据此序号 ζ'找到相应的预编码码 字 , 从而也获得相应的信道状态信息, ^表示了信道的特征矢量信息。 一般来说, 码本空间 可以进一步地被划分为多个层数( Rank )对应的码 本,每个 Rank下会对应多个码字来量化该 Rank下信道特征矢量构成的预编码 矩阵。 由于信道的 Rank和非零特征矢量个数是相等的, 因此, 一般来说 Rank 为 N时码字都会有 N列。所以,码本空间 可按 Rank的不同分为多个子码本, 如表 1所示的码本按 Rank分为多个子码本示意表。 表 1
Figure imgf000004_0002
其中, 在 Rank> l时需要存储的码字都为矩阵形式。
LTE协议中的码本就是釆用的这种码本量化的反馈方法, LTE下行 4发射 天线码本如表 2所示的 LTE下行 4个发射天线的码本示意表, 实际上 LTE中 预编码码本和信道状态信息量化码本含义是一样的。在下文中,为了统一起见, 矢量也可以看成一个维度为 1的矩阵。
Figure imgf000004_0001
Figure imgf000005_0001
其中, Wn = I— 2unun H jun Hun , I 为单位阵, 表示矩阵 Wk的第 j列矢量。 Wk( J")表示矩阵 Wk的第 ,, j2 , ...Jn列构成的矩阵, 表示 un的共轭转置矩阵; 其中, n表示序号, 取值为 0〜15。 通常所述的信道状态信息中的一种比较重要的信息类型就是信道的特征 矢量信息, 又经常称为预编码信息。 由于使用码本反馈该预编码信息, 也经常 称其为预编码矩阵指示 (Precoding Matrix Indicator, PMI ) 信息。 在 LTE的标准中, 信道状态信息的最小反馈单位是子带(Subband ), —个 子带由若千个资源块 ( Resource Block, RB ) 组成, 每个 RB由多个资源单元 ( Resource Element, RE )组成; RE为 LTE中时频资源的最小单位。 UE反馈 信道状态信息时对应的对象可以是子带, 或者是多个子带 (Multi - Subband ), 以及宽带 ( Wideband )。
LTE中存在很多反馈模式, 不同的传输模式下有不同的反馈模式, 这里介 绍一下闭环空间复用的传输模式下的反馈模式。 空间复用时, 上行信道状态信息的反馈内容主要有三种: PMI信息: 表征特征矢量信息, 推荐给基站, 用于下行预编码技术。
RI信息: 表征信道的秩, 推荐给基站, 作为下行支持的层数。 LTE中最大 支持 RI = 4; 信道质量信息(Channel Quality Information, CQI ), 表征信道的质量信息, 以推荐的调制编码方式来表征信道质量, 越高阶的调制编码方式表示性能越 好, LTE*** 16种 CQI等级选择。 这些重要的信道状态信息: PMI/RI/CQI的反馈方式包括以下两种: 周期反馈,主要 载在物理上行控制信道( Physical Uplink Control Channel, PUCCH ) 上的反馈; 非周期反馈, 载在物理上行共享信道 ( Physical Uplink Shared Channel, PUSCH ) 上的反馈。 承载在 PUCCH上的周期反馈, 是一种最常用的反馈, 周期反馈是必须配 置的。 非周期反馈是不定期触发型的反馈, 属于辅助的反馈方式, 是用于提高 精度的反馈, 其开销一般较大。
LTE中 PUCCH上信道状态信息周期反馈方式中有 4种反馈类型 ( Type ):
Type 1: 反馈 UE选择的子带的子带 CQI;
Type 2: 反馈宽带的 CQI和 PMI信息;
Type 3 : 反馈 RI信息;
Type 4: 只反馈宽带的 CQI。 支持闭环空间复用模式的终端, 涉及上述反馈类型的前三种, LTE中 Type 2和 Type 3的一种反馈方式如表 3所示。 表 3
Figure imgf000006_0001
艮告类型 (Report Type ) 3 的 RI信息是独立编码的, 如 4Tx下用 2bit 4 个 态表示 RI为 1、 2、 3或 4。
Report Type 2 中包含 4bit的 PMI信息, 指示 LTE码本中的某个码字, 另 夕卜还包含 CQI信息。 RI = 1时为 1个 CQI, RI > 1时为 2个 CQI。 1个 CQI时 为 4bit, 反馈 2个 CQI时, 第 2个 CQI使用差分技术, 基于第 1个 CQI差分, 为 3bit。最大为 l ibit,这也是 PUCCH上反馈时 CSI信息的最大可支持的开销。 高级长期演进 ( Long Term Evolution Advanced, LTE- A ) ***作为 LTE的 演进标准, 支持更大的***带宽 (最高可达 100MHz ), 并后向兼容 LTE现有 的标准。 为了提高小区边缘的覆盖和吞吐量, LTE-A在现有的 LTE***的基础 上, 下行支持到了最大 8根天线, 和 RI = 8, 并在反馈且提出了一些反馈增强 的技术, 主要是增强码本的反馈精度, 该技术能够提高演进的国际移动通信
( International Mobile Telecommunications- Advance , IMT- Advance ) ***的频 谱利用率、 緩解频谱资源紧缺。 该技术可以描述为:
1 ) 一个子带的预编码 /反馈结构由两个矩阵组成。 2 ) 两个矩阵中的每一个矩阵都隶属于一个单独的码本。 码本是由基站和
UE同时预先知道的。 码本可以在不同的时间和不同的子带上有所变化。
3 ) —个矩阵表示宽带或者长时信道的属性。 另一个矩阵表示确定频带上 或者短时信道的属性。
4 )所使用的矩阵码本以有限可数矩阵集的形式表示, 并且对 UE和基站而 言, 每个矩阵都是可知的。 从这里可以看出, 信道状态信息的反馈方面提出了一种基于双码本的结 构, 进一步可以描述为: 对于需要反馈信道状态信息的一个子带或多个联合子带, UE 向基站反馈 至少两个 PMI信息, 分别为 PMI1和 PMI2, 其中 PMI1对应一个码本 C1中的 码字 Wl , PMI2对应另外一个码本 C2 中的码字 W2。 基站端有相同的 C1和 C2的信息, 收到 PMI1和 PMI2后从对应的码本 C1和 C2中找到对应的码字 W1和 W2, 并根据约定的函数规则 F ( Wl , W2 ) 获得信道状态信息, 例如: F ( Wl , W2 ) =W1*W2或者 W2*W1。 其中, W1 —定表示宽带信道状态信息, W1 或者 W1 结合固定取值 W2 可以完整表示当前的空间信道状态信息; W2 通常表示子带的信道状态信息, 也是也表示宽带的信道状态信息, W2 本身无法独立地表示当前的空间信道状 态信息, 依赖于 W1而存在。 在 LTE-A中, 支持 SU-MIMO/MU-MIMO的传输模式下, 需要反馈的宽带 /多子带信道状态信息中, 需要传输的信道状态信息有 RI, PMI1和 PMI2, 以 及 CQI。 相关技术通过反馈 Type 2和 Type 3传输这些信道状态信息, 例如釆 用下述方法:
Report Type3 : 由 2bit上升为 3bit;
Report Type2: 包含所有 PMI信息及宽带 CQI; 这种方法的 Report Type2需要传输 PMI1+PMI2+CQI, 超过 PUCCH上支 持的最大开销 l ibit, 因此, 需要 PUCCH扩容。 或者, 在反馈 Type2和 Type3时, 增力。一个 4艮告类型 Report Type来传输 上述信道状态信息, 但这样会增加开销。 由此可知,相关技术中反馈信道状态信息的方法不能满足 LTE-A***的需 求, 需要增加信令开销或扩容 PUCCH。 发明内容 本发明的主要目的在于提供种信道状态信息的反馈方法及终端, 以至少解 决上述反馈信道状态信息需要的增加信令开销或扩容 PUCCH的问题。 根据本发明的一个方面, 提供了一种信道状态信息的反馈方法, 包括: 终 端比较信道的秩 RI与设定值 M的大小; 该终端根据比较的结果确定多个反馈 信道状态信息的报告类型; 该终端使用确定的报告类型反馈信道状态信息。 上述终端根据比较的结果确定多个反馈信道状态信息的报告类型包括: 当 RI小于等于 M时, 终端使用双码本结构中的码字 W1和码字 W2共同表征子 带或宽带的信道状态信息; 终端确定多个 4艮告类型反馈信道状态信息, 其中, 反馈 RI 的指示信息的报告类型中还包含子带或宽带的指定信道状态信息, 子 带或宽带的信道状态信息用与码字 W1和码字 W2关联的指示信息表示。 上述终端确定多个报告类型反馈信道状态信息包括: 终端确定使用报告类 型一、 报告类型二和报告类型三反馈信道状态信息; 其中, 报告类型一包含 RI的指示信息和码字 W2集合划分的集合归属指示信息;报告类型二包含一个 码字 W1 的指示信息和 nl 个信道的信道质量指示信息 CQI; 4艮告类型三包含 集合归属指示信息对应的码字 W2的集合内的指示信息和 n2个信道的 CQI; nl和 n2是大于等于 1的整数。 上述终端确定多个报告类型反馈信道状态信息包括: 终端确定使用报告类 型一、 报告类型二和报告类型三反馈信道状态信息; 其中, 报告类型一包含 RI的指示信息和码字 W2集合划分的集合归属指示信息;报告类型二包含一个 码字 W1的指示信息、 至少一个集合归属指示信息对应的码字 W2的集合内的 指示信息和 nl个信道的 CQI; 报告类型三包含 n2个集合归属指示信息对应的 码字 W2的集合内的指示信息和 n3个信道的 CQI; nl和 n2是大于等于 1的整 数, n3是大于等于 0的整数。 上述终端确定多个报告类型反馈信道状态信息包括: 终端确定使用报告类 型一、 报告类型二和报告类型三反馈信道状态信息; 其中, 报告类型一包含 RI的指示信息、码字 W1集合划分的第一集合归属指示信息和码字 W2集合划 分的第二集合归属指示信息; 报告类型二包含第一集合归属指示信息对应的码 字 W1的集合内的指示信息、 至少一个第二集合归属指示信息对应的码字 W2 的集合内的指示信息和 nl个信道的 CQI; 报告类型三包含 n2个第二集合归属 指示信息对应的码字 W2的集合内的指示信息和 n3个信道的 CQI; nl和 n2是 大于等于 1的整数, n3是大于等于 0的整数。 上述终端确定多个报告类型反馈信道状态信息包括: 终端确定使用报告类 型一和报告类型二反馈信道状态信息; 其中, 报告类型一包含 RI 的指示信息 和码字 W2集合划分的集合归属指示信息; 报告类型二包含一个码字 W1的指 示信息、至少一个集合归属指示信息对应的码字 W2的结合内的指示信息和 nl 个信道的 CQI; 其中, nl是大于等于 1的整数。 上述终端确定多个报告类型反馈信道状态信息包括: 终端确定使用报告类 型一和报告类型二反馈信道状态信息; 其中, 报告类型一包含 RI的指示信息、 码字 W1集合划分的第一集合归属指示信息和码字 W2集合划分的第二集合归 属指示信息; 报告类型二包含第一集合归属指示信息对应的码字 W1的集合内 的指示信息、 至少一个第二集合归属指示信息对应的码字 W2的集合内的指示 信息和 nl个信道的 CQI; 其中, nl是大于等于 1的整数。 上述终端根据比较的结果确定多个反馈信道状态信息的报告类型包括: 当 RI大于 M时, 终端使用单码本结构, 1个码字 W表征子带或宽带的信道状态 信息; 终端确定使用报告类型一和报告类型二反馈信道状态信息; 其中, 报告 类型一包含 RI的指示信息, 在需要反馈码字 W的指示信息时, 报告类型二包 含指定部分或全部码字 W的指示信息。 上述终端根据比较的结果确定多个反馈信道状态信息的报告类型包括: 当 RI大于 M时, 终端使用双码本结构, 一个 W1和固定取值的 W2共同表征子 带或宽带的信道状态信息; 终端确定使用报告类型一和报告类型二反馈信道状 态信息; 其中, 报告类型一包含 RI的指示信息, 在需要反馈码字 W1 的指示 信息时, 报告类型二包含指定部分或全部码字 W1的指示信息。 上述报告类型一中的指示信息釆用联合编码。
RI在 1至 N中取值, 其中, N为基站的发送天线数数目和终端的接收天 线数中的最小值, M为大于 1且不大于 N的整数。 根据本发明的另一方面, 提供了一种终端, 包括: 比较模块, 设置为比较 信道的秩 RI与设定值 M的大小; 报告确定模块, 设置为根据比较模块的比较 结果确定多个反馈信道状态信息的报告类型; 反馈模块, 设置为使用报告确定 模块确定的报告类型反馈信道状态信息。 上述报告确定模块包括: 第一表征单元, 设置为当 RI小于等于 M时, 使 用双码本结构中的码字 W1和码字 W2共同表征子带或宽带的信道状态信息; 第一确定单元, 设置为确定多个报告类型反馈信道状态信息, 其中, 反馈 RI 的指示信息的报告类型中还包含子带或宽带的指定信道状态信息, 子带或宽带 的信道状态信息用与码字 W1和码字 W2关联的指示信息表示。 上述第一确定单元包括: 第一确定子单元, 设置为确定使用报告类型一、 报告类型二和报告类型三反馈信道状态信息; 其中, 报告类型一包含 RI 的指 示信息和码字 W2 集合划分的集合归属指示信息; 报告类型二包含一个码字 W1的指示信息和 nl个信道的信道质量指示信息 CQI;报告类型三包含集合归 属指示信息对应的码字 W2的集合内的指示信息和 n2个信道的 CQI; nl和 n2 是大于等于 1的整数。 上述第一确定单元包括: 第二确定子单元, 设置为确定使用报告类型一、 报告类型二和报告类型三反馈信道状态信息; 其中, 报告类型一包含 RI 的指 示信息和码字 W2 集合划分的集合归属指示信息; 报告类型二包含一个码字 W1的指示信息、 至少一个集合归属指示信息对应的码字 W2的集合内的指示 信息和 nl个信道的 CQI; 报告类型三包含 n2个集合归属指示信息对应的码字 W2的集合内的指示信息和 n3个信道的 CQI; nl和 n2是大于等于 1的整数, n3是大于等于 0的整数。 上述第一确定单元包括: 第三确定子单元, 设置为确定使用报告类型一、 报告类型二和报告类型三反馈信道状态信息; 其中, 报告类型一包含 RI 的指 示信息、 码字 W1集合划分的第一集合归属指示信息和码字 W2集合划分的第 二集合归属指示信息; 报告类型二包含第一集合归属指示信息对应的码字 W1 的集合内的指示信息、 至少一个第二集合归属指示信息对应的码字 W2的集合 内的指示信息和 nl个信道的 CQI; 报告类型三包含 n2个第二集合归属指示信 息对应的码字 W2的集合内的指示信息和 n3个信道的 CQI; nl和 n2是大于等 于 1的整数, n3是大于等于 0的整数。 上述第一确定单元包括: 第四确定子单元, 设置为确定使用 ^艮告类型一和 报告类型二反馈信道状态信息; 其中, 报告类型一包含 RI 的指示信息和码字 W2集合划分的集合归属指示信息; 报告类型二包含一个码字 W1的指示信息、 至少一个集合归属指示信息对应的码字 W2的结合内的指示信息和 nl 个信道 的 CQI; 其中, nl是大于等于 1的整数。 上述第一确定单元包括: 第五确定子单元, 设置为确定使用报告类型一和 报告类型二反馈信道状态信息; 其中, 报告类型一包含 RI 的指示信息、 码字 W1集合划分的第一集合归属指示信息和码字 W2集合划分的第二集合归属指 示信息; 报告类型二包含第一集合归属指示信息对应的码字 W1的集合内的指 示信息、 至少一个第二集合归属指示信息对应的码字 W2的集合内的指示信息 和 nl个信道的 CQI; 其中, nl是大于等于 1的整数。 上述报告确定模块包括: 第二表征单元, 设置为当 RI大于 M时, 使用单 码本结构, 1个码字 W表征子带或宽带的信道状态信息; 第二确定单元, 设置 为确定使用报告类型一和报告类型二反馈信道状态信息; 其中, 报告类型一包 含 RI的指示信息, 在需要反馈码字 W的指示信息时, 报告类型二包含指定部 分或全部码字 W的指示信息。 上述报告确定模块包括: 第三表征单元, 设置为当 RI大于 M时, 使用双 码本结构, 一个 W1和固定取值的 W2共同表征子带或宽带的信道状态信息; 第三确定单元, 设置为确定使用报告类型一和报告类型二反馈信道状态信息; 其中, 报告类型一包含 RI的指示信息, 在需要反馈码字 W1 的指示信息时, 艮告类型二包含指定部分或全部码字 W1的指示信息。 通过本发明, 釆用确定的报告类型反馈信道状态信息, 可以在不超过 PUCCH 允许的最大开销的前提下, 充分利用报告类型中的开销字节将信道状 态信息反馈给基站, 解决了相关反馈信道状态信息技术中需要的增加信令开销 或扩容 PUCCH的问题, 提高了向基站反馈信道状态信息的速度。 附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的不 当限定。 在附图中: 图 1是 居本发明实施例的一种信道状态信息的反馈方法流程图; 图 2是 居本发明实施例 1的信道状态信息的反馈内容示意图; 图 3是 居本发明实施例 2的信道状态信息的反馈内容示意图; 图 4是 居本发明实施例 3的信道状态信息的反馈内容示意图; 图 5是 居本发明实施例 4的信道状态信息的反馈内容示意图; 图 6是 居本发明实施例 5的信道状态信息的反馈内容示意图; 图 7是根据本发明实施例 6的信道状态信息的反馈方法流程图; 图 8是 居本发明实施例的终端的结构框图; 图 9是 居本发明实施例的终端的具体结构框图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不 冲突的情况下, 本申请中的实施例及实施例中的特征可以相互组合。 图 1示出了根据本发明实施例的一种信道状态信息的反馈方法流程图, 该 方法包括以下步 4聚: 步骤 S 102: 终端比较信道的秩 RI与设定值 M的大小; 步骤 S 104:终端根据上述比较的结果确定多个反馈信道状态信息的报告类 型; 当 RI小于等于 M时, 终端使用双码本结构中的码字 W1和码字 W2共同 表征子带或宽带的信道状态信息; 终端确定多个 4艮告类型反馈信道状态信息, 其中, 反馈 RI的指示信息的 4艮告类型中除了 RI的指示信息外, 还包含子带或 宽带的指定信道状态信息, 本实施例中的子带或宽带的信道状态信息用与码字 W1和码字 W2关联的指示信息表示。 本实施例可以釆用下述几种方式表示: 本实施例的指定信道状态信息可以是集合归属指示信息, 例如: 表示 W2的码 字指示信息为码字 W2所在码本的哪部分中。 第一种方式 终端确定使用报告类型一、 报告类型二和报告类型三反馈信道状态信息; 其中, 报告类型一包含 RI的指示信息和码字 W2集合划分的集合归属指示信 息; 报告类型二包含一个码字 W1 的指示信息和 nl 个信道的信道质量指示信 息 CQI; 报告类型三包含集合归属指示信息对应的码字 W2的集合内的指示信 息和 n2个信道的 CQI; nl和 n2是大于等于 1的整数。 第二种方式 终端确定使用报告类型一、 报告类型二和报告类型三反馈信道状态信息; 其中, 报告类型一包含 RI的指示信息和码字 W2集合划分的集合归属指示信 息; 报告类型二包含一个码字 W1的指示信息、 至少一个集合归属指示信息对 应的码字 W2的集合内的指示信息和 nl个信道的 CQI; 报告类型三包含 n2个 集合归属指示信息对应的码字 W2的集合内的指示信息和 n3个信道的 CQI; nl和 n2是大于等于 1的整数, n3是大于等于 0的整数。 第三种方式 终端确定使用报告类型一、 报告类型二和报告类型三反馈信道状态信息; 其中, 报告类型一包含 RI的指示信息、 码字 W1 集合划分的第一集合归属指 示信息和码字 W2集合划分的第二集合归属指示信息; 报告类型二包含第一集 合归属指示信息对应的码字 W1的集合内的指示信息、 至少一个第二集合归属 指示信息对应的码字 W2的集合内的指示信息和 nl个信道的 CQI; 4艮告类型 三包含 n2个第二集合归属指示信息对应的码字 W2的集合内的指示信息和 n3 个信道的 CQI; nl和 n2是大于等于 1的整数, n3是大于等于 0的整数。 第四种方式 终端确定使用报告类型一和报告类型二反馈信道状态信息; 其中, 报告类 型一包含 RI的指示信息和码字 W2集合划分的集合归属指示信息; 报告类型 二包含一个码字 W1的指示信息、 至少一个集合归属指示信息对应的码字 W2 的结合内的指示信息和 nl个信道的 CQI; 其中, nl是大于等于 1的整数。 第五种方式 终端确定使用报告类型一和报告类型二反馈信道状态信息; 其中, 报告类 型一包含 RI的指示信息、 码字 W1 集合划分的第一集合归属指示信息和码字 W2 集合划分的第二集合归属指示信息; 报告类型二包含第一集合归属指示信 息对应的码字 W1的集合内的指示信息、 至少一个第二集合归属指示信息对应 的码字 W2的集合内的指示信息和 nl个信道的 CQI; 其中, nl是大于等于 1 的整数。 当 RI大于 M时, 终端可以釆用下述方式确定 4艮告类型: 终端使用 1 个码字 W表征子带或宽带的信道状态信息, 或者终端使用一 个固定的矩阵和码字 W 共同表征子带或宽带的信道状态信息; 确定使用报告 类型一和报告类型二反馈信道状态信息; 其中, 报告类型一包含所述 RI 的指 示信息, 在需要反馈码字 W 的指示信息时, 报告类型二包含指定部分或全部 码字 W的指示信息。 上述报告类型一中的指示信息可以釆用联合编码。 上述 RI在 1至 N中取值, 其中, N为基站的发送天线数数目和该终端的 接收天线数中的最小值, M为大于 1且不大于 N的整数。 步骤 S 106: 终端使用确定的报告类型反馈信道状态信息。 本实施例的终端可以为支持闭环空间复用模式的设备。 本发明实施例通过确定的报告类型反馈信道状态信息, 可以在不超过 PUCCH 允许的最大开销的前提下, 充分利用报告类型中的开销字节将信道状 态信息反馈给基站, 解决了相关反馈信道状态信息技术中需要的增加信令开销 或扩容 PUCCH的问题, 提高了向基站反馈信道状态信息的速度。 实施例 1 如图 2所示, 在支持闭环空间复用的模式中, 用户设备至少使用三种报告 类型 ( Report Type )反馈信道^! 态信息, 包括 Report Type A、 Report Type B和 Report Type C; 其中: 当信道的秩 RI小于等于 M时, 用户设备使用码字 W1和码字 W2共同表 征子带或宽带的信道状态信息,并反馈码字 W1和码字 W2的指示信息给基站; Report Type A 包含信道的秩 RI和一种码字 W2 集合划分的联合指示信息; Report Type B包含一个 Wl的指示信息和 nl个信道质量指示信息 CQI; Report Type C包含 n2个另一种码字 W2集合划分的指示信息和 n3个信道质量指示信 息 CQI; 其中, Report Type A中的一种码字 W2的集合指示信息和 Report Type C中的任何一个另一种 W2集合的指示信息可以共同唯一指示一个码字 W2; nl和 n2是大于等于 1的正整数, n3是大于等于 0的正整数。 当信道的秩 RI大于 M时,用户设备使用 1个码字 W表示子带或宽带的信 道状态信息并反馈码字 W 的指示信息给基站或者不反馈码字信息; 或者, 用 户设备使用码字 W1和固定取值的 W2共同表征子带或宽带的信道状态信息, 并反馈码字 W1的指示信息给基站或不反馈码字信息; Report Type A包含信息 指示信道的秩 RI的指示信息, 在需要反馈码字 W的指示信息时, Report Type B信息包含部分或全部码字 W的指示信息或指示信息; 信道的秩 RI在 1 ~ N中取值, N=min (基站的发送天线数数目,用户设备的 接收天线数 ), M为大于 1且不大于 N的整数。 当信道的秩 RI大于 M时, Report Type A不包含码字 W的指示信息, 或 Report Type A还包含部分码字 W的指示信息, 或者的 Report Type A还包含 Wl的指示信息。 Report Type B中还包括至少一个信道质量指示 ( CQI ) 信息;
Report Type A中的信道的秩 RI和一种 W2集合的指示信息釆用联合编码。 当信道的秩小于等于 M时, Report Type A中的联合指示信息可以指示码 本 C2中一个 W2码字集合, Report Type B中 W2的指示信息可以唯一指示 W2码字集合中的一个 W2的码字。 例如, 终端当前发送天线的端口数目为 4 , 终端反馈信道状态信息使用的 报告类型如下:
Report Type A是一个 PUCCH的报告, 包括了 ml比特 RI的指示信息和 1 比特 W2的码字集合划分指示信息(也可以称为集合归属指示信息), 1比特的 W2的码字集合划分指示信息可以将所有 W2码字划分为两个码字集合, 一个 码字集合对应的天线是 ULA ( Uniform Linear Array, 均匀线性阵列) 的情况, 另一个码字集合对应的天线是双极化的情况,其中 ml是大于等于 1的正整数。
Report Type B也是一个 PUCCH的报告, 包括了一个 W1的指示信息和若 千 CQI。 其中, W1的码本是 Release 8码本, 可以用 4比特来指示, 并且 W1 是一个宽带的信息。 CQI也是宽带 CQI, 当只有一个码字流的时候, 只有一个 CQI, 当有两个码字流的时候就有两个 CQI。
Report Type C同样是一个 PUCCH的 4艮告, 包括了 Report Type A指定 W2 码字集合中 W2的指示信息, 占有 2比特, W2是一个子带的信息; 还有一个 BP ( Back Propagation, 反向传播) 中子带位置指示信息, 占有 2 比特; 当有 两个码字流的时候, 有两个 CQI, 分别需要 4比特和 3比特。 下面给出一个更加具体的例子来说明 Wl , W2等概念。假设当前下行的发 送天线端口数目为 4,对于信道的秩 rank=l、 2,使用双码本结构; 对于 rank=3、 4, 保持使用 Release 8的单码本结构。 对于 rank=l、 2中的一个子带而言, 一个预编码矩阵 W是两个矩阵 W1和 W2的乘积、的形式。 在这里, Wl G C1并且 W2 G C2。
C2 ={C2,o, ... ,C2,7}是一个 3比特的码本, 其中, C 表示 C2中第 j个码字, j=0, 1 , 7; W2是一个 4x4对角方阵, 也是一个酉阵, W2选自于 C2。
Figure imgf000016_0001
k=4, 5 : C2 k = diag{\, 1, , a) a = 1, j k=6,7: C k = diag{ eieX eie ) , θ = -,—
' 8 8
Cl是 Release 8中 4才艮发送天线 rank=l或者 2的码本, 并且 W1是一个 NtxR矩阵, 选自于 Cl。 对于 R=3, 4, 对应一个预编码 W选自于 Release 8的 4才艮发送天线 rank=R 的码本。 对于 Report Type A, 1 比特的 W2的码字集合划分指示信息可以将所有
W2 码字划分为两个码字集合 {C2,。,..., C2,3}和 {C2,4, ..., C2,7}, 一个码字集合 {C2,o,..., C2,3}对应的天线是 ULA ( Uniform Linear Array, 均匀线性阵列) 的情 况, 另一个码字集合 {C2,4,..., C2,7}对应的天线是双极化的情况, 其中 ml是大 于等于 1的正整数。
Report Type C包括了 Report Type A指定 W2码字集合中 W2的指示信息, 占有 2比特。
Report Type A的 W2相关指示信息(集合归属指示信息)指示应该选择前 一半码字还是后一半码字, Report Type C的 W2相关指示信息指示前一半码字 或者后一半码字中第几个就是 W2, 综合两部分信息可以完整确定 W2的取值。 实施例 2 如图 3所示, 在支持闭环空间复用的模式中, 用户设备至少使用三种报告 类型 ( Report Type )反馈信道^! 态信息, 包括 Report Type A、 Report Type B和 Report Type C; 其中: 当信道的秩 RI小于等于 M时, 用户设备使用码字 W1和码字 W2共同表 征子带或宽带的信道状态信息,并反馈码字 W1和码字 W2的指示信息给基站; Report Type A包含信道的秩 RI和一种码字 W2集合划分的联合编码的指示信 息; Report Type B包含一个 W1的指示信息、 一个 W2的指示信息和 nl个信 道质量指示信息 CQI; Report Type C包含 n2个另一种码字 W2集合划分的指 示信息和 n3个信道质量指示信息 CQI; 其中, Report Type A中的一种码字 W2 的集合指示信息和 Report Type C中的任何一个另一种 W2集合的指示信息可以 共同唯一指示一个码字 W2; nl和 n2是大于等于 1的正整数, n3是大于等于 0的整数。 当信道的秩 RI大于 M时,用户设备使用 1个码字 W表示子带或宽带的信 道状态信息并反馈所述码字 W的指示信息给基站或者不反馈码字信息; 或者, 用户设备使用码字 W1和固定取值的 W2共同表征子带或宽带的信道状态信息, 并反馈码字 W1的指示信息给基站或不反馈码字信息; Report Type A包含信息 指示信道的秩 RI的指示信息,在需要反馈码字 W的指示信息时, Report Type B信息包含部分或全部码字 W的指示信息或指示信息; 信道的秩 RI在 1 ~ N中取值, N=min (基站的发送天线数数目,用户设备的 接收天线数), M为大于 1且不大于 N的正整数。 当信道的秩 RI大于 M时, Report Type A不包含码字 W的指示信息, 或 Report Type A还包含部分码字 W的指示信息, 或者 Report Type A还包含 W1 的指示信息。
Report Type B中还包括至少一个信道质量指示 ( CQI ) 信息; Report Type A中的信道的秩 RI和一种 W2集合的指示信息釆用联合编码。 当信道的秩小于等于 M时, Report Type A中的联合指示信息可以指示码 本 C2 中一个 W2码字集合, Report Type B 中 W2的指示信息可以唯一指示 W2码字集合中的一个 W2的码字。 例如, 终端当前发送天线的端口数目为 4 , 终端反馈信道状态信息使用的 告类型如下:
Report Type A是一个 PUCCH的报告, 包括了 ml比特 RI的指示信息和 1 比特 W2的码字集合划分指示信息, 1比特的 W2的码字集合划分指示信息可 以将所有 W2码字划分为两个码字集合, 一个码字集合对应的天线是 ULA的 情况, 另一个码字集合对应的天线是双极化的情况, 其中 ml是大于等于 1的 正整数。
Report Type B也是一个 PUCCH的报告, 包括了一个 W1的指示信息和若 千 CQI。 其中, W1的码本是 Release 8码本, 可以用 4比特来指示, 并且 W1 是一个宽带的信息。 CQI 也是宽带 CQI, 当只有一个码字流的时候只有一个 CQI, 当有两个码字流的时候就有两个 CQI。 不同于实施例 1 , 这个 4艮告还包 括另一个 W2码字集合划分的指示信息,可以在 Report Type A指示的 W2的集 合唯一指示一个 W2的码字, 占有 2比特, W2是一个宽带信息。
Report Type C同样是一个 PUCCH的报告, 包括了另一个 W2码字集合的 指示信息, 占有 2比特, W2是一个子带的信息; 还有一个 BP 中子带位置指 示信息, 占有 2比特; 当有两个码字流的时候, 有两个 CQI, 分别需要 4比特 和 3比特。 实施例 3 如图 4所示, 在支持闭环空间复用的模式中, 用户设备至少使用三种报告 类型 ( Report Type )反馈信道^! 态信息, 包括 Report Type A、 Report Type B和 Report Type C; 其中: 当信道的秩 RI小于等于 M时, 用户设备使用码字 W1和码字 W2共同表 征子带或宽带的信道状态信息,并反馈码字 W1和码字 W2的指示信息给基站; Report Type A包含信道的秩 RI、一种码字 W2集合划分和一种码字 W1集合划 分的联合指示信息 (即, 该联合指示信息包括三部分: RI的指示信息、 W2的 集合归属指示信息和 W1的集合归属指示信息); Report Type B包含另一种码 字 W1集合划分的指示信息、 一个 W2的指示信息和 nl个信道质量指示信息 CQI; Report Type C包含 n2个另一种码字 W2集合划分的指示信息和 n3个信 道质量指示信息 CQI; 其中, Report Type A中的一种码字 W2的集合指示信息 和 Report Type C中的任何一个另一种 W2集合的指示信息可以共同唯一指示一 个码字 W2; Report Type A中的一种码字 W1的集合划分指示信息和 Report Type B 中的一个另一种 W1集合划分的指示信息可以共同唯一指示一个码字 W1 ; nl和 n2是大于等于 1的整数, n3是大于等于 0的整数。 当信道的秩 RI大于 M时,用户设备使用 1个码字 W表示子带或宽带的信 道状态信息并反馈码字 W 的指示信息给基站或者不反馈码字信息; 或者, 用 户设备使用码字 W1和固定取值的 W2共同表征子带或宽带的信道状态信息, 并反馈码字 W的指示信息给基站或不反馈码字信息; Report Type A包含信息 指示信道的秩 RI的指示信息, 在需要反馈码字 W的指示信息时, Report Type B包含指定部分或全部码字 W的指示信息或指示信息; 信道的秩 RI在 1 ~ N中取值, N=min (基站的发送天线数数目,用户设备的 接收天线数 ), M为大于 1且不大于 N的正整数。 当信道的秩 RI大于 M时, Report Type A不包含码字 W的指示信息, 或 Report Type A还包含部分码字 W的指示信息, 或者 Report Type A还包含 W1 的指示信息。
Report Type B中还包括至少一个信道质量指示 ( CQI ) 信息; Report Type A中的信道的秩 RI和一种 W2集合的指示信息釆用联合编码。 当信道的秩小于等于 M时, Report Type A中的联合指示信息可以指示码 本 C1 中一个 W1码字集合, Report Type B 中 Wl 的指示信息可以唯一指示 W1码字集合中的一个 W1的码字。 当信道的秩小于等于 M时, Report Type A中的联合指示信息可以指示码 本 C2 中一个 W2码字集合, Report Type B 中 W2的指示信息可以唯一指示 W2码字集合中的一个 W2的码字。 例如, 终端当前发送天线的端口数目为 4 , 终端反馈信道状态信息使用的 报告类型如下:
Report Type A是一个 PUCCH的报告, 包括了 ml比特 RI的指示信息和 1 比特 W2的码字集合划分指示信息, 1比特的 W2的码字集合划分指示信息可 以将所有 W2码字划分为两个码字集合, 一个码字集合对应的天线是 ULA的 情况, 另一个码字集合对应的天线是双极化的情况。 不同于实施例 2, 这个报 告还包括一个 m2比特的 W1的码字集合划分指示信息, 其中 ml、 m2是大于 等于 1的整数。
Report Type B也是一个 PUCCH的 4艮告, 包括了一个 m3 比特的集合内 W1的指示信息和若千个 CQI, 集合内 W1指示信息可以在 Report Type A指示 的 Wl的集合中唯一指示一个 W1的码字。其中, W1的码本是 Release 8码本, 可以用 4比特来指示, 并且 W1是一个宽带的信息。 CQI也是宽带 CQI, 当只 有一个码字流的时候只有一个 CQI, 当有两个码字流的时候就有两个 CQI。 不 同于实施例 1 , 这个报告还包括另一个 W2码字集合划分的指示信息, 可以在 Report Type A指示的 W2的集合唯一指示一个 W2的码字, 占有 2比特, W2 是一个宽带信息。 Report Type C同样是一个 PUCCH的报告, 包括了另一个 W2码字集合的 指示信息, 占有 2比特, W2是一个子带的信息; 还有一个 BP 中子带位置指 示信息, 占有 2比特; 当有两个码字流的时候, 有两个 CQI, 分别需要 4比特 和 3比特。 实施例 4 如图 5所示, 本实施例的用户设备反馈信道状态信息使用的报告类型, 除 了没有 Report Type C以外, 同实施例 2相同, 这里不再详述。 实施例 5 如图 6所示, 本实施例的用户设备反馈信道状态信息使用的报告类型, 除 了没有 Report Type C以外, 同实施例 3相同, 这里不再详述。 实施例 6 如图 7所示, 为终端使用上述实施例中的报告类型的信道状态信息的反馈 方法流程图, 该方法包括以下步 4聚: 步骤 S702: 终端测量下行导频, 获得下行信道状态信息; 步骤 S704: 终端根据信道状态信息计算 RI、 WI、 W2和 CQI, 或者是计 算 RI、 W和 CQI; 步骤 S706: 终端在 PUCCH上反馈 WI、 W2和 CQI; 终端在反馈 WI、 W2和 CQI时, 使用上述实施例中提供的报告类型, 这 里不再详述。 步骤 S708: 基站在 PUCCH上接收 WI、 W2和 CQI, 获得新的信道状态信 息。 本发明实施例的终端反馈 WI、 W2和 CQI时, 釆用确定的报告类型进行, 可以在不超过 PUCCH允许的最大开销的前提下, 充分利用报告类型中的开销 字节将信道状态信息反馈给基站, 解决了相关反馈信道状态信息技术中需要的 增加信令开销或扩容 PUCCH的问题,提高了向基站反馈信道状态信息的速度。 图 8示出了 居本发明实施例的一种终端的结构框图, 该终端包括: 比较模块 82 , 设置为比较信道的秩 RI与设定值 M的大小; 报告确定模块 84 , 与比较模块 82连接, 设置为根据比较模块 82的比较结 果确定多个反馈信道状态信息的报告类型; 反馈模块 86 , 与报告确定模块 84连接, 设置为使用报告确定模块 84确定 的报告类型反馈信道状态信息。 如图 9所示的终端的具体结构框图, 该报告确定模块 84包括: 第一表征单元 842 , 设置为当 RI小于等于 M时, 使用双码本结构中的码 字 W1和码字 W2共同表征子带或宽带的信道状态信息; 第一确定单元 844 , 与第一表征单元 842连接, 设置为确定多个报告类型, 其中, 反馈 RI的指示信息的 4艮告类型中除了 RI的指示信息外, 还包含上述子 带或宽带的指定信道状态信息, 子带或宽带的信道状态信息用与码字 W1和码 字 W2关联的指示信息表示。 本实施例的指定信道状态信息可以是集合归属指 示信息, 例如: 表示 W2的码字指示信息为码字 W2所在码本的哪部分中; 第二表征单元 846, 设置为当 RI大于 M时, 使用单码本结构, 1个码字 W表征子带或宽带的信道状态信息; 第二确定单元 848, 与第二表征单元 846连接, 设置为确定使用报告类型 一和报告类型二反馈信道状态信息; 其中, 报告类型一包含 RI 的指示信息, 在需要反馈码字 W的指示信息时, 报告类型二包含指定部分或全部码字 W的 指示信息。 或者, 该终端中的 4艮告确定模块 84 包括上述第一表征单元 842和第一确 定单元 844, 以及下述的第三表征单元和第三确定单元; 其中: 第三表征单元, 设置为当所述 RI大于所述 M时, 使用双码本结构, 一个 W1和固定取值的 W2共同表征子带或宽带的信道状态信息; 第三确定单元, 设置为确定使用报告类型一和报告类型二反馈所述信道状 态信息; 其中, 4艮告类型一包含所述 RI的指示信息, 在需要反馈码字 W1 的 指示信息时, 报告类型二包含指定部分或全部码字 W1的指示信息。 第一确定单元 844可以有多种实现方式, 例如: 第一种方式, 第一确定单元 844包括: 第一确定子单元, 设置为确定使用报告类型一、 报告类型二和报告类型三 反馈信道状态信息; 其中, 报告类型一包含 RI的指示信息和码字 W2集合划 分的集合归属指示信息; 报告类型二包含一个码字 W1 的指示信息和 nl 个信 道的信道质量指示信息 CQI; 报告类型三包含集合归属指示信息对应的码字 W2的集合内的指示信息和 n2个信道的 CQI; nl和 n2是大于等于 1的整数。 第二种方式, 第一确定单元 844包括: 第二确定子单元, 设置为确定使用报告类型一、 报告类型二和报告类型三 反馈信道状态信息; 其中, 报告类型一包含 RI的指示信息和码字 W2集合划 分的集合归属指示信息; 报告类型二包含一个码字 W1的指示信息、 至少一个 集合归属指示信息对应的码字 W2的集合内的指示信息和 nl 个信道的 CQI; 艮告类型三包含 n2个集合归属指示信息对应的码字 W2的集合内的指示信息 和 n3个信道的 CQI; nl和 n2是大于等于 1的整数, n3是大于等于 0的整数。 第三种方式, 第一确定单元 844包括: 第三确定子单元, 设置为确定使用报告类型一、 报告类型二和报告类型三 反馈信道状态信息; 其中, 报告类型一包含 RI的指示信息、 码字 W1 集合划 分的第一集合归属指示信息和码字 W2集合划分的第二集合归属指示信息; 报 告类型二包含第一集合归属指示信息对应的码字 W1的集合内的指示信息、 至 少一个第二集合归属指示信息对应的码字 W2的集合内的指示信息和 nl 个信 道的 CQI; 报告类型三包含 n2个第二集合归属指示信息对应的码字 W2的集 合内的指示信息和 n3个信道的 CQI; nl和 n2是大于等于 1的整数, n3是大 于等于 0的整数。 第四种方式, 第一确定单元 844包括: 第四确定子单元, 设置为确定使用报告类型一和报告类型二反馈信道状态 信息; 其中, 报告类型一包含 RI的指示信息和码字 W2集合划分的集合归属 指示信息; 报告类型二包含一个码字 W1的指示信息、 至少一个集合归属指示 信息对应的码字 W2的结合内的指示信息和 nl个信道的 CQI; 其中, nl是大 于等于 1的整数。 第五种方式, 第一确定单元 844包括: 第五确定子单元, 设置为确定使用报告类型一和报告类型二反馈信道状态 信息; 其中, 报告类型一包含 RI的指示信息、 码字 W1 集合划分的第一集合 归属指示信息和码字 W2集合划分的第二集合归属指示信息; 报告类型二包含 第一集合归属指示信息对应的码字 W1的集合内的指示信息、 至少一个第二集 合归属指示信息对应的码字 W2的集合内的指示信息和 nl个信道的 CQI; 其 中, nl是大于等于 1的整数。 上述 4艮告类型一中的指示信息可以釆用联合编码。 上述 RI在 1至 N中取值, 其中, N为基站的发送天线数数目和该终端的 接收天线数中的最小值, M为大于 1且不大于 N的整数。 本实施例的终端可以为支持闭环空间复用模式的设备。 本发明实施例通过确定的报告类型反馈信道状态信息, 可以在不超过 PUCCH 允许的最大开销的前提下, 充分利用报告类型中的开销字节将信道状 态信息反馈给基站, 解决了相关反馈信道状态信息技术中需要的增加信令开销 或扩容 PUCCH的问题, 提高了向基站反馈信道状态信息的速度。 以上实施例充分利用 RI的指示信息占用的开销比较小, 反馈 RI的指示信 息的报告类型将会有空闲开销的特点, 将可能会超过 PUCCH允许的最大开销 的报告类型中的指示信息进行划分, 并将划分后的集合归属指示信息与 RI 的 指示信息一起发送给基站, 根据基站的指示在后续的报告类型中反馈该集合归 属指示信息对应的集合内的指示信息。 这种方式不会增加开销, 也无需扩容 PUCCH, 即可达到反馈信道状态信息的目的。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可以 用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布在多 个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程序代码 来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 并且在某些 情况下, 可以以不同于此处的顺序执行所示出或描述的步骤, 或者将它们分别 制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作成单个集成电 路模块来实现。 这样, 本发明不限制于任何特定的硬件和软件结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领 域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的 ^"神和原则 之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之 内。

Claims

权 利 要 求 书
1. 一种信道状态信息的反馈方法, 包括:
终端比较信道的秩 RI与设定值 M的大小;
所述终端根据所述比较的结果确定多个反馈所述信道状态信息的报 告类型;
所述终端使用确定的报告类型反馈所述信道状态信息。
2. 根据权利要求 1所述的方法, 其中, 所述终端根据所述比较的结果确定 多个反馈所述信道状态信息的报告类型包括:
当所述 RI小于等于所述 M时, 所述终端使用双码本结构中的码字 W1和码字 W2共同表征子带或宽带的信道状态信息;
所述终端确定多个报告类型反馈所述信道状态信息, 其中, 反馈所 述 RI 的指示信息的报告类型中还包含所述子带或所述宽带的指定信道 状态信息, 所述子带或所述宽带的信道状态信息用与所述码字 W1和码 字 W2关联的指示信息表示。
3. 根据权利要求 2所述的方法, 其中, 所述终端确定多个报告类型反馈所 述信道状态信息包括:
所述终端确定使用报告类型一、 报告类型二和报告类型三反馈所述 信道状态信息;
其中 ,所述艮告类型一包含所述 RI的指示信息和所述码字 W2集合 划分的集合归属指示信息;
所述 4艮告类型二包含一个所述码字 W1的指示信息和 nl个信道的信 道质量指示信息 CQI;
所述报告类型三包含所述集合归属指示信息对应的所述码字 W2的 集合内的指示信息和 n2个信道的 CQI; nl和 n2是大于等于 1的整数。
4. 根据权利要求 2所述的方法, 其中, 所述终端确定多个报告类型反馈所 述信道状态信息包括: 所述终端确定使用报告类型一、 报告类型二和报告类型三反馈所述 信道状态信息;
其中 ,所述艮告类型一包含所述 RI的指示信息和所述码字 W2集合 划分的集合归属指示信息;
所述 4艮告类型二包含一个所述码字 W1 的指示信息、 至少一个所述 集合归属指示信息对应的所述码字 W2的集合内的指示信息和 nl个信道 的 CQI;
所述 4艮告类型三包含 n2 个所述集合归属指示信息对应的所述码字 W2的集合内的指示信息和 n3个信道的 CQI;
nl和 n2是大于等于 1的整数, n3是大于等于 0的整数。 根据权利要求 2所述的方法, 其中, 所述终端确定多个报告类型反馈所 述信道状态信息包括:
所述终端确定使用报告类型一、 报告类型二和报告类型三反馈所述 信道状态信息;
其中, 所述报告类型一包含所述 RI的指示信息、 所述码字 W1集合 划分的第一集合归属指示信息和所述码字 W2集合划分的第二集合归属 指示信息;
所述报告类型二包含所述第一集合归属指示信息对应的所述码字 W1 的集合内的指示信息、 至少一个所述第二集合归属指示信息对应的 所述码字 W2的集合内的指示信息和 nl个信道的 CQI;
所述报告类型三包含 n2 个所述第二集合归属指示信息对应的所述 码字 W2的集合内的指示信息和 n3个信道的 CQI;
nl和 n2是大于等于 1的整数, n3是大于等于 0的整数。 根据权利要求 2所述的方法, 其中, 所述终端确定多个报告类型反馈所 述信道状态信息包括:
所述终端确定使用报告类型一和报告类型二反馈所述信道状态信 息;
其中 ,所述艮告类型一包含所述 RI的指示信息和所述码字 W2集合 划分的集合归属指示信息; 所述 4艮告类型二包含一个所述码字 W1 的指示信息、 至少一个所述 集合归属指示信息对应的所述码字 W2的结合内的指示信息和 nl个信道 的 CQI; 其中, nl是大于等于 1的整数。
7. 根据权利要求 2所述的方法, 其中, 所述终端确定多个报告类型反馈所 述信道状态信息包括:
所述终端确定使用报告类型一和报告类型二反馈所述信道状态信 息;
其中, 所述报告类型一包含所述 RI的指示信息、 所述码字 W1集合 划分的第一集合归属指示信息和所述码字 W2集合划分的第二集合归属 指示信息;
所述报告类型二包含所述第一集合归属指示信息对应的所述码字 W1 的集合内的指示信息、 至少一个所述第二集合归属指示信息对应的 所述码字 W2的集合内的指示信息和 nl个信道的 CQI; 其中, nl是大 于等于 1的整数。
8. 根据权利要求 1所述的方法, 其中, 所述终端根据所述比较的结果确定 多个反馈所述信道状态信息的报告类型包括:
当所述 RI大于所述 M时, 所述终端使用单码本结构, 1个码字 W 表征子带或宽带的信道状态信息;
所述终端确定使用报告类型一和报告类型二反馈所述信道状态信 息;
其中,所述报告类型一包含所述 RI的指示信息,在需要反馈码字 W 的指示信息时, 所述 4艮告类型二包含指定部分或全部码字 W 的指示信 息。
9. 根据权利要求 1所述的方法, 其中, 所述终端根据所述比较的结果确定 多个反馈所述信道状态信息的报告类型包括:
当所述 RI大于所述 M时, 所述终端使用双码本结构, 一个 W1和 固定取值的 W2共同表征子带或宽带的信道状态信息;
所述终端确定使用报告类型一和报告类型二反馈所述信道状态信 息; 其中, 所述报告类型一包含所述 RI 的指示信息, 在需要反馈码字 W1 的指示信息时, 所述 4艮告类型二包含指定部分或全部码字 W1 的指 示信息。
10. 根据权利要求 3-9任一项所述的方法, 其中, 所述报告类型一中的指示 信息釆用联合编码。
11. 根据权利要求 3-9任一项所述的方法, 其中, 所述 RI在 1至 N中取值, 其中, N为基站的发送天线数数目和所述终端的接收天线数中的最小值, 所述 M为大于 1且不大于 N的整数。
12. 一种终端, 包括:
比较模块, 设置为比较信道的秩 RI与设定值 M的大小; 报告确定模块, 设置为根据所述比较模块的比较结果确定多个反馈 信道状态信息的报告类型;
反馈模块, 设置为使用所述报告确定模块确定的报告类型反馈所述 信道状态信息。
13. 根据权利要求 12所述的终端, 其中, 所述报告确定模块包括:
第一表征单元, 设置为当所述 RI小于等于所述 M时, 使用双码本 结构中的码字 W1和码字 W2共同表征子带或宽带的信道状态信息; 第一确定单元, 设置为确定多个报告类型反馈所述信道状态信息, 其中,反馈所述 RI的指示信息的 4艮告类型中还包含所述子带或所述宽带 的指定信道状态信息, 所述子带或所述宽带的信道状态信息用与所述码 字 W1和码字 W2关联的指示信息表示。
14. 根据权利要求 13所述的终端, 其中, 所述第一确定单元包括:
第一确定子单元, 设置为确定使用报告类型一、 报告类型二和报告 类型三反馈所述信道状态信息;
其中 ,所述艮告类型一包含所述 RI的指示信息和所述码字 W2集合 划分的集合归属指示信息;
所述 4艮告类型二包含一个所述码字 W1的指示信息和 nl个信道的信 道质量指示信息 CQI; 所述报告类型三包含所述集合归属指示信息对应的所述码字 W2的 集合内的指示信息和 n2个信道的 CQI; nl和 n2是大于等于 1的整数。
15. 根据权利要求 13所述的终端, 其中, 所述第一确定单元包括:
第二确定子单元, 设置为确定使用报告类型一、 报告类型二和报告 类型三反馈所述信道状态信息;
其中 ,所述艮告类型一包含所述 RI的指示信息和所述码字 W2集合 划分的集合归属指示信息;
所述 4艮告类型二包含一个所述码字 W1 的指示信息、 至少一个所述 集合归属指示信息对应的所述码字 W2的集合内的指示信息和 nl个信道 的 CQI;
所述 4艮告类型三包含 n2 个所述集合归属指示信息对应的所述码字 W2的集合内的指示信息和 n3个信道的 CQI;
nl和 n2是大于等于 1的整数, n3是大于等于 0的整数。
16. 根据权利要求 13所述的终端, 其中, 所述第一确定单元包括:
第三确定子单元, 设置为确定使用报告类型一、 报告类型二和报告 类型三反馈所述信道状态信息;
其中, 所述报告类型一包含所述 RI的指示信息、 所述码字 W1集合 划分的第一集合归属指示信息和所述码字 W2集合划分的第二集合归属 指示信息;
所述报告类型二包含所述第一集合归属指示信息对应的所述码字 W1 的集合内的指示信息、 至少一个所述第二集合归属指示信息对应的 所述码字 W2的集合内的指示信息和 nl个信道的 CQI;
所述报告类型三包含 n2 个所述第二集合归属指示信息对应的所述 码字 W2的集合内的指示信息和 n3个信道的 CQI;
nl和 n2是大于等于 1的整数, n3是大于等于 0的整数。
17. 根据权利要求 13所述的终端, 其中, 所述第一确定单元包括:
第四确定子单元, 设置为确定使用报告类型一和报告类型二反馈所 述信道状态信息; 其中,所述艮告类型一包含所述 RI的指示信息和所述码字 W2集合 划分的集合归属指示信息;
所述 4艮告类型二包含一个所述码字 W1 的指示信息、 至少一个所述 集合归属指示信息对应的所述码字 W2的结合内的指示信息和 nl个信道 的 CQI; 其中, nl是大于等于 1的整数。
18. 根据权利要求 13所述的终端, 其中, 所述第一确定单元包括:
第五确定子单元, 设置为确定使用报告类型一和报告类型二反馈所 述信道状态信息;
其中, 所述报告类型一包含所述 RI的指示信息、 所述码字 W1集合 划分的第一集合归属指示信息和所述码字 W2集合划分的第二集合归属 指示信息;
所述报告类型二包含所述第一集合归属指示信息对应的所述码字 W1 的集合内的指示信息、 至少一个所述第二集合归属指示信息对应的 所述码字 W2的集合内的指示信息和 nl个信道的 CQI; 其中, nl是大 于等于 1的整数。
19. 根据权利要求 12所述的终端, 其中, 所述报告确定模块包括:
第二表征单元, 设置为当所述 RI大于所述 M时, 使用单码本结构, 1个码字 W表征子带或宽带的信道状态信息;
第二确定单元, 设置为确定使用报告类型一和报告类型二反馈所述 信道状态信息; 其中, 所述报告类型一包含所述 RI的指示信息, 在需要 反馈码字 W的指示信息时,所述报告类型二包含指定部分或全部码字 W 的指示信息。
20. 根据权利要求 12所述的终端, 其中, 所述报告确定模块包括:
第三表征单元, 设置为当所述 RI大于所述 M时, 使用双码本结构, 一个 W1和固定取值的 W2共同表征子带或宽带的信道状态信息;
第三确定单元, 设置为确定使用报告类型一和报告类型二反馈所述 信道状态信息; 其中, 所述报告类型一包含所述 RI的指示信息, 在需要 反馈码字 W1的指示信息时, 所述 告类型二包含指定部分或全部码字 W1的指示信息。
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