WO2012028023A1 - Procédé et terminal pour renvoi d'informations d'état de canal - Google Patents

Procédé et terminal pour renvoi d'informations d'état de canal 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)
Chinese (zh)
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/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • 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
    • H04B7/0636—Feedback format
    • H04B7/0645—Variable feedback
    • H04B7/065—Variable contents, e.g. long-term or short-short
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling 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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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention porte sur un procédé et un terminal pour renvoi d'informations d'état de canal. Le procédé comprend les opérations suivantes : le terminal compare un rang RI d'un canal à une valeur donnée M, détermine de multiples types de rapport à l'aide desquels les informations d'état de canal sont renvoyées conformément au résultat de comparaison, et renvoie les informations d'état de canal à l'aide des types de rapport déterminés. La présente invention résout le problème d'augmentation du surdébit de signalisation et d'extension d'un canal de commande de liaison montante physique (PUCCH) qui sont requises dans la technique correspondante de renvoi d'informations d'état de canal, et améliore une vitesse de renvoi d'informations d'état de canal à une station de base.
PCT/CN2011/076330 2010-08-16 2011-06-24 Procédé et terminal pour renvoi d'informations d'état de canal WO2012028023A1 (fr)

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CN101902309B (zh) * 2010-08-16 2015-06-03 中兴通讯股份有限公司 信道状态信息的反馈方法及终端
CN102651677B (zh) * 2011-02-24 2016-05-25 华为技术有限公司 Mimo的码本指示反馈方法及装置
CN103220069A (zh) * 2012-01-20 2013-07-24 华为技术有限公司 反馈信道状态信息的方法及设备
CN110649951B (zh) 2015-11-06 2023-12-01 大唐移动通信设备有限公司 一种信道状态信息反馈、数据传输方法及装置
CN107888324A (zh) * 2016-09-29 2018-04-06 株式会社Ntt都科摩 由移动台、基站执行的反馈和接收方法、移动台及基站

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CN101902307A (zh) * 2010-06-22 2010-12-01 中兴通讯股份有限公司 信道状态信息的反馈方法及终端
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