WO2014161166A1 - 信道状态信息上报方法、接收方法及设备 - Google Patents

信道状态信息上报方法、接收方法及设备 Download PDF

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Publication number
WO2014161166A1
WO2014161166A1 PCT/CN2013/073691 CN2013073691W WO2014161166A1 WO 2014161166 A1 WO2014161166 A1 WO 2014161166A1 CN 2013073691 W CN2013073691 W CN 2013073691W WO 2014161166 A1 WO2014161166 A1 WO 2014161166A1
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WO
WIPO (PCT)
Prior art keywords
matrix
antenna port
configuration information
pmi
precoding matrix
Prior art date
Application number
PCT/CN2013/073691
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English (en)
French (fr)
Inventor
王建国
周永行
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to PCT/CN2013/073691 priority Critical patent/WO2014161166A1/zh
Priority to BR112015024196-4A priority patent/BR112015024196B1/pt
Priority to CN201810317108.1A priority patent/CN108809388B/zh
Priority to EP20155179.3A priority patent/EP3748865B1/en
Priority to JP2015560519A priority patent/JP6108250B2/ja
Priority to CN201810317107.7A priority patent/CN108809387B/zh
Priority to EP13880734.2A priority patent/EP2942880B1/en
Priority to CN201380002671.5A priority patent/CN104303431B/zh
Publication of WO2014161166A1 publication Critical patent/WO2014161166A1/zh
Priority to US14/868,762 priority patent/US10868600B2/en

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Classifications

    • 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
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • 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
    • H04B7/0639Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection

Definitions

  • the present invention relates to a communication technology, and in particular, to a channel state information reporting method, a receiving method, and a device. Background technique
  • y the received signal vector
  • H the channel matrix
  • V the precoding matrix
  • s the transmitted symbol vector
  • n the interference and noise vector.
  • the transmitter needs to know channel state information (CSI).
  • CSI channel state information
  • the CSI includes a rank indicator (referred to as RI), a precoding matrix indicator (PMI), and a channel quality indicator (in the Long Term Evolution, LTE for short).
  • CQI Channel Quality Indicator
  • RI and PMI indicate the number of layers and precoding matrix used, respectively.
  • a set of precoding matrices used is generally referred to as a codebook, and each precoding matrix is a codeword in a codebook.
  • the codebooks in the existing LTE R8-R11 system are based on the antenna design of the conventional base station.
  • the antenna of the conventional base station has a downtilt angle of fixed or remote ESC, and only the horizontal direction can dynamically adjust its antenna beam by precoding or beamforming. .
  • AAS base stations further provide the vertical degree of freedom of the antenna, mainly through its horizontal and vertical two-dimensional antenna array; on the other hand, for AAS base stations, consider more
  • the antenna ports such as the number of antenna ports currently considered, can be 8, 16, 32 and 64.
  • the antenna array structure may be different, so that the same number of antenna ports may also receive different channel state measurements in different array structures. In this case, CSI reporting or feedback is required to adaptive antenna array structure. .
  • the LTE R12 system of the base station can ensure that the legacy user equipment (User Equipment, UE for short) of the LTE R8-Rl 1 can work normally or the performance does not decrease.
  • the prior art antenna port configuration information and the method of the upper CSI especially the structure of the existing precoding matrix, cannot adapt to the requirements of the ASS base station antenna configuration. Therefore, it is necessary to provide a CSI reporting scheme suitable for the ASS base station scenario.
  • the AAS base station can fully utilize the advantages of increasing system capacity and improving coverage by utilizing horizontal and vertical degrees of freedom.
  • the embodiments of the present invention provide a channel state information reporting method, a receiving method, and a device, which are used to solve the problem of reporting CSI in an ASS base station scenario, and improve the accuracy of CSI reporting or feedback.
  • the first aspect provides a channel state information reporting method, including:
  • reference signal resource configuration information includes antenna port configuration information, where the antenna port configuration information is used to indicate an antenna port structure
  • a precoding matrix indicating PMI where the PMI is used to indicate the selected precoding matrix.
  • the antenna port configuration information includes an index m and an index n, where the index m corresponds to the number of rows in the antenna port structure, and the index n corresponds to The number of columns in the antenna port structure.
  • the matrix of x / ", p and q are positive integers, and r is the rank of the precoding matrix.
  • a fourth possible implementation manner of the first aspect comprising means for indicating the PMI is matrix W i a first PMI and a second PMI for indicating the matrix w 2;
  • the reporting the precoding matrix indication PMI to the base station includes:
  • the second aspect provides a channel state information receiving method, including:
  • the reference signal resource configuration information includes antenna port configuration information, and the antenna port configuration information is used to indicate Antenna port structure
  • a precoding matrix indicating a PMI where the PMI is used to indicate a precoding matrix selected by the user equipment, where the precoding matrix is selected by the user equipment from the codebook based on the reference signal.
  • the structure of the precoding matrix corresponds to an antenna port structure indicated by the antenna port configuration information.
  • the antenna port configuration information includes an index m and an index n, where the index m corresponds to the number of rows in the antenna port structure, and the index n corresponds to The number of columns in the antenna port structure.
  • W ⁇ AtgB; ® represents the Kronecker product
  • a and B are a matrix of mx P and nx q, respectively, or A and B are a matrix of ⁇ and 111 ⁇ , respectively, and W 2 is a ( pq ) x / "The matrix, p and q are positive integers, and r is the rank of the precoding matrix.
  • the PMI for indicating comprises a matrix of w i a first PMI and a second PMI for indicating the matrix w 2;
  • the receiving the precoding matrix indication PMI reported by the user equipment includes:
  • the first PMI and the second PMI reported by the user equipment are respectively received.
  • the third aspect provides a user equipment, including:
  • An acquiring module configured to acquire reference signal resource configuration information, where the reference signal resource configuration information includes antenna port configuration information, the antenna port configuration information is used to indicate an antenna port structure, and a receiving module is configured to acquire according to the acquiring module.
  • the reference signal resource configuration information receiving a reference signal sent by the base station;
  • a selection module configured to select, according to the reference signal received by the receiving module, a precoding matrix from a codebook, where a structure of the precoding matrix corresponds to an antenna port structure indicated by the antenna port configuration information;
  • a sending module configured to report, to the base station, a precoding matrix indication PMI, where the PMI is used to indicate a precoding matrix selected by the selecting module.
  • the antenna port configuration information includes an index m and an index n, where the index m corresponds to the number of rows in the antenna port structure, and the index n corresponds to The number of columns in the antenna port structure.
  • W ⁇ A tgB ; ® represents the Kronecker product
  • a and B are a matrix of mx P and nx q, respectively, or A and B are a matrix of ⁇ and 111 ⁇ , respectively
  • W 2 is a ( pq ) x / "matrix, p and q are positive integers, and r is the rank of the precoding matrix.
  • a fourth possible implementation manner of the third aspect comprising means for indicating the PMI is matrix w i a first PMI and a second PMI for indicating the matrix w 2;
  • the sending module is specifically configured to report the first PMI and the second to the base station, respectively.
  • a fourth aspect provides a base station, including:
  • a sending module configured to send a reference signal to the user equipment, where the user equipment receives the reference signal based on pre-acquired reference signal resource configuration information, where the reference signal resource configuration information includes antenna port configuration information, the antenna port
  • the configuration information is used to indicate an antenna port structure
  • the receiving module is configured to receive a precoding matrix indication PMI that is sent by the user equipment, where the PMI is used to indicate a precoding matrix selected by the user equipment, where the precoding matrix is The user equipment is selected from the codebook based on the reference signal, and the structure of the precoding matrix corresponds to an antenna port structure indicated by the antenna port configuration information.
  • the antenna port configuration information includes an index m and an index n, where the index m corresponds to the number of rows in the antenna port structure, and the index n corresponds to The number of columns in the antenna port structure.
  • Wi A ® B ;
  • ® represents the Kronecker product
  • a and B are a matrix of mx P and nx q, respectively, or
  • a and B are a matrix of ⁇ and 111 ⁇ , respectively, and
  • W 2 is a ( pq
  • the matrix, p and q are positive integers, and r is the rank of the precoding matrix.
  • the PMI includes a first PMI for indicating the matrix W i and a second PMI for indicating the matrix w 2
  • the receiving module is specifically configured to receive the first PMI and the second PMI that are reported by the user equipment, respectively.
  • a fifth aspect provides a user equipment, including: a processor, a receiver, and a transmitter; the processor, configured to acquire reference signal resource configuration information, where the reference signal resource configuration information includes antenna port configuration information, and the antenna
  • the port configuration information is used to indicate an antenna port structure, and is used to select a precoding matrix from the codebook based on the reference signal received by the receiver, the structure of the precoding matrix and the antenna indicated by the antenna port configuration information.
  • the port configuration information is used to indicate an antenna port structure, and is used to select a precoding matrix from the codebook based on the reference signal received by the receiver, the structure of the precoding matrix and the antenna indicated by the antenna port configuration information.
  • the receiver is configured to receive the reference signal sent by the base station according to the reference signal resource configuration information acquired by the processor;
  • the transmitter is configured to report, to the base station, a precoding matrix indication PMI, where the PMI is used to indicate a precoding matrix selected by the processor.
  • a sixth aspect provides a base station, including:
  • a transmitter configured to send a reference signal to the user equipment, where the user equipment receives the reference signal based on pre-acquired reference signal resource configuration information, where the reference signal resource configuration information includes antenna port configuration information, the antenna port
  • the configuration information is used to indicate an antenna port structure;
  • the receiver is configured to receive a precoding matrix indication PMI that is reported by the user equipment, where the PMI is used to indicate a precoding matrix selected by the user equipment, where the precoding matrix is The user equipment is selected from the codebook based on the reference signal, and the structure of the precoding matrix corresponds to an antenna port structure indicated by the antenna port configuration information.
  • the channel state information reporting method, the receiving method, and the user equipment provided by the embodiment of the present invention obtain reference signal resource configuration information including antenna port configuration information, and receive a reference signal sent by the base station according to the reference signal resource configuration information, based on Receiving a reference signal, selecting a precoding matrix from the codebook, and reporting a PMI for indicating the selected precoding matrix to the base station, where the antenna port configuration information indicates an antenna port structure, and the structure of the precoding matrix Corresponding to the antenna port structure.
  • more information about the structure of the antenna port is provided, and the structure of the precoding matrix corresponds to the antenna port structure indicated by the antenna port configuration information. This feature allows the CSI measurement and reporting process to be considered simultaneously.
  • Figure la is a flowchart of a method for reporting channel state information according to an embodiment of the present invention
  • Figure 1b is a flowchart of a method for receiving channel state information according to an embodiment of the present invention
  • Figures 2a-2c are embodiments of the present invention
  • a schematic structural diagram of a uniform linear array is provided
  • FIG. 4 is a schematic structural diagram of a UE according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of another UE according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of another base station according to an embodiment of the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • Figure la is a flowchart of a method for reporting channel state information according to an embodiment of the present invention. As shown in FIG. la, the method includes:
  • the UE first acquires reference signal resource configuration information in order to receive the reference signal sent by the base station, and then receives the reference signal sent by the base station based on the reference signal resource configuration information.
  • the reference signal resource configuration information includes, in addition to the antenna port configuration information, a subframe configuration corresponding to the reference signal (eg, a subframe period and a subframe offset of the reference signal) and a reference signal occupation. Resource Element (RE).
  • the UE specifically receives the reference signal sent by the base station on the subframe indicated by the reference signal resource configuration information and the resource unit.
  • the number of the reference signals is the same as the number of antenna ports indicated by the antenna port configuration information.
  • the antenna port structure indicated by the antenna port configuration information provides antenna port information that is more abundant than the number of antenna ports.
  • the acquiring the reference signal resource configuration information includes: receiving, by the UE, the reference signal resource configuration information that is sent by the base station by using high layer signaling or dynamic signaling.
  • the high-level signaling may be Radio Resource Control (RRC) signaling or Media Access Control (MAC) layer signaling, but is not limited thereto.
  • the dynamic signaling may be Downlink Control Information (DCI) transmitted through a physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) or an enhanced PDCCH (ePDCCH), but is not limited to this.
  • DCI Downlink Control Information
  • the acquiring the reference signal resource configuration information includes: obtaining, by the UE, the reference signal resource configuration information according to a cell identifier (ID) of the cell in which the cell is located.
  • ID a cell identifier
  • the UE may obtain a reference signal resource configuration corresponding to each cell ID by receiving a broadcast or multicast message, and then obtain the reference signal resource configuration information corresponding to the current cell ID based on the local cell ID.
  • the selecting, according to the received reference signal, a precoding matrix from the codebook includes:
  • Channel estimation based on the received reference signal for example, a channel estimation value may be obtained from the received reference signal using a least squares method or a minimum mean square error criterion;
  • precoding is selected from the codebook based on predefined criteria, such as capacity or throughput or mutual information maximization criteria.
  • predefined criteria such as capacity or throughput or mutual information maximization criteria.
  • the structure of the precoding matrix and the antenna end indicated by the antenna port configuration information corresponds. That is to say, the structure of the precoding matrix is related not only to the number of antenna ports but also to the antenna port structure. If the number of antenna ports is the same, but the antenna port structure is different, the structure of the corresponding precoding matrix will be different.
  • the structure of the precoding matrix corresponds to the antenna port structure indicated by the antenna port configuration information, and the structure of the precoding matrix may correspond to the antenna port configuration, thereby corresponding to the antenna port structure indicated. It can be seen that the structure of the precoding matrix in this embodiment can adapt the antenna port structure to improve the accuracy of CSI feedback or reporting.
  • the UE selects the precoding matrix from the codebook, to facilitate the implementation of the transmit precoding technique, the PMI for indicating the selected precoding matrix is reported to the base station.
  • the UE may report other CSI information, such as RI and/or CQI, to the base station in addition to the PMI for indicating the selected precoding matrix.
  • CSI information such as RI and/or CQI
  • the manner in which the base station CSI includes a PMI includes: the UE adopts a physical uplink control channel (PUCCH) or a physical uplink shared channel (Physical Uplink Shared Channel, Referred to as PUSCH, reporting CSI to the base station includes PMI, but is not limited thereto.
  • PUCCH physical uplink control channel
  • PUSCH Physical Uplink Shared Channel
  • the UE may further receive a data signal sent by the base station, where the data signal is obtained by the base station according to the PMI reported by the UE, and the data is pre-coded and transmitted.
  • the pre-coded data signal sent by the base station is received by a Physical Downlink Shared Channel (PDSCH).
  • PDSCH Physical Downlink Shared Channel
  • the base station receives the PMI and obtains a precoding matrix selected by the UE from the codebook.
  • the base station uses the precoding because the structure of the precoding matrix can adapt to the antenna port structure to improve the accuracy of CSI feedback or reporting.
  • the matrix pre-encodes the data and sends it to the UE to improve the capacity and reliability of the data transmission, thereby improving the throughput and coverage of the system.
  • the precoding matrices that are adapted to different antenna port structures may constitute different codebooks, so that the PMI may be reported or fed back only for the antenna port structure indicated by the antenna port configuration information, thereby effectively reducing CSI reporting or feedback. Overhead.
  • the precoding matrix included in the codebook is a union of precoding matrices of multiple antenna ports or array structures. This hybrid design will result in a larger codebook and thus excessive feedback overhead.
  • the antenna port structure may be an antenna array structure.
  • the structure of the antenna array has more changes, and the corresponding antenna port structure has corresponding changes, even if the same The number of antenna ports and antenna array structures may also be different, so that the same numbered antenna ports may also have different channel state measurements in different array configurations.
  • the precoding matrix corresponding to the antenna port structure is obtained, and the PMI for indicating the selected precoding matrix is reported to the base station, so that the selected precoding matrix can be adaptive to the antenna.
  • the array structure or the antenna port structure improves the accuracy of CSI reporting or feedback, reduces the overhead of CSI reporting or feedback, and improves the capacity or throughput of data transmission, thereby improving system capacity and coverage. Applicable to the scenario of ASS base station deployment, which solves the problem of reporting CSI in the ASS base station scenario.
  • FIG. 1b is a flowchart of a method for receiving channel state information according to an embodiment of the present invention. As shown in FIG. 1b, the method includes:
  • 201 Send a reference signal to the UE, where the UE receives the reference signal based on the reference signal resource configuration information acquired in advance, where the reference signal resource configuration information includes antenna port configuration information, and the antenna port configuration information is used to indicate Antenna port structure.
  • the UE first acquires reference signal resource configuration information in order to receive the reference signal sent by the base station, and then receives the reference signal sent by the base station based on the reference signal resource configuration information.
  • the number of reference signals transmitted by the base station is the same as the number of antenna ports indicated by the antenna port configuration information.
  • the reference signal resource configuration information includes, in addition to the antenna port configuration information, a subframe configuration corresponding to the reference signal, such as a subframe period and a subframe offset of the reference signal, and a reference signal occupation. RE and so on.
  • the UE specifically receives the reference signal sent by the base station on the subframe indicated by the reference signal resource configuration information and the resource unit.
  • the base station before the base station sends the reference signal to the UE, the base station sends the reference signal resource configuration information to the UE by using high layer signaling or dynamic signaling.
  • the high layer signaling may be RRC signaling or MAC layer signaling, but is not limited thereto.
  • the dynamic signaling may be a DCI transmitted through a PDCCH or an ePDCCH, but is not limited thereto.
  • the UE may further obtain the reference signal resource configuration information according to the cell identifier (ID) of the cell in which the base station is located, and the base station may broadcast Or the multicast mode notifies the UE of the reference signal resource configuration corresponding to each cell ID.
  • ID cell identifier
  • the structure corresponds to an antenna port structure indicated by the antenna port configuration information.
  • the structure of the precoding matrix corresponds to the antenna port structure indicated by the antenna port configuration information, and the structure of the precoding matrix may correspond to the antenna port configuration so as to correspond to the antenna port structure indicated.
  • the base station After the base station sends the reference signal to the UE, it waits for the PMI reported by the UE. After receiving the reference signal, the UE selects a precoding matrix from the codebook based on the received reference signal. Specifically, the UE performs channel estimation based on the received reference signal, for example, a least squares method or a minimum mean square error may be utilized. A criterion is to derive a channel estimate from the received reference signal; and then using the derived channel estimate, the precoding is selected from the codebook based on predefined criteria, such as capacity or throughput or mutual information maximization criteria. The use of channel estimation and predefined criteria for selecting precoding matrices is well known and will not be described here.
  • the UE After the UE selects the precoding matrix, the UE sends a base station to indicate the selected precoding matrix.
  • the base station receives the PMI reported by the UE.
  • the base station may receive other CSI information, such as RI and/or CQI, in addition to the PMI reported by the UE for indicating the selected precoding matrix.
  • CSI information such as RI and/or CQI
  • the receiving, by the base station, the CSI, including the PMI includes: the physical uplink control channel (PUCCH) or the physical uplink shared channel (Physical Uplink Shared Channel)
  • the abbreviation PUSCH) receiving UE reporting CSI includes PMI, but is not limited thereto.
  • the base station may further obtain a precoding matrix according to the PMI reported by the UE, and perform precoding and data transmission on the data to be sent to the UE by using the obtained precoding matrix.
  • the precoded data signal is transmitted to the UE, for example, via the PDSCH.
  • the base station receives the PMI and obtains a precoding matrix selected by the UE from the codebook.
  • the base station uses the precoding because the structure of the precoding matrix can adapt to the antenna port structure to improve the accuracy of CSI feedback or reporting.
  • the matrix pre-encodes the data and sends it to the UE to improve the capacity and reliability of the data transmission, thereby improving the throughput and coverage of the system.
  • precoding matrices that are adaptive to different antenna port structures may constitute different codebooks, and thus may be based on the above
  • the antenna port configuration information only reports or feeds back the PMI for the antenna port structure indicated by the antenna port, thereby effectively reducing the overhead of CSI reporting or feedback.
  • the antenna port structure may be an antenna array structure.
  • the antenna port structure indicated by the antenna port configuration information provides antenna port information that is more abundant than the number of antenna ports.
  • the structure of the precoding matrix selected by the UE corresponds to the antenna port structure indicated by the antenna port configuration information. That is to say, the structure of the precoding matrix selected by the UE is not only related to the number of antenna ports, but also related to the antenna port structure. If the number of antenna ports is the same but the antenna port structure is different, the structure of the corresponding precoding matrix will be different.
  • the structure of the precoding matrix corresponds to the antenna port structure indicated by the antenna port configuration information, and the structure of the precoding matrix may correspond to the antenna port configuration to correspond to the antenna port structure indicated. It can be seen that the structure of the precoding matrix in this embodiment can adapt the antenna port structure to improve the accuracy of CSI feedback or reporting.
  • the structure of the precoding matrix corresponds to the antenna port structure indicated by the antenna port configuration information.
  • the degree of freedom of the base station antenna in horizontal and vertical directions can improve the accuracy of CSI reporting or reduce the overhead of feedback.
  • the base station precoding the data by using the precoding matrix and transmitting the data to the UE can improve the capacity and reliability of the data transmission, thereby improving the throughput and coverage of the system. It is applicable to the scenario where the AAS base station antenna is deployed, and solves the problem of reporting CSI in the ASS base station scenario.
  • one reference signal often corresponds to one physical antenna or virtual antenna, and the virtual antenna can be obtained by weighted combination of multiple physical antennas.
  • Actual antenna deployments may have different antenna configurations and antenna array forms.
  • the antenna array B is a uniform linear array of 2 rows and 8 columns; as shown in FIG. 2c, the antenna array C is a uniform linear array of 4 rows and 4 columns; although both the antenna array B and the array C have 16 antennas. Port, but its array form is different.
  • the antenna array E is a 2-row and 4-column cross-polarized antenna array. As shown in FIG.
  • the antenna array F is a 4-row and 2-column cross-polarized antenna array, wherein different polarized antennas can be used.
  • the antenna array form is different.
  • different antenna arrays correspond to different antenna port structures, antenna port structures and antenna array junctions Structure - corresponding.
  • the antenna port structures are 2 X 8 and 4 X 4 respectively.
  • the antenna port configuration information in the embodiment of the present invention includes an index m and an index n; wherein, the index m corresponds to the number of rows in the antenna port structure, that is, the number of rows in the antenna array structure corresponding to the antenna port structure; Corresponding to the number of columns in the antenna port structure, that is, the number of columns in the antenna array structure corresponding to the antenna port structure.
  • the product of the index m and the index n is the number N of antenna ports.
  • antenna array D (0, 1, 4, 5) is a 45° polarized co-polarized antenna group; (2, 3, 6, 7) is a -45° polarized co-polarized antenna. Group; 0 and 2, 1 and 3, 4 and 6, 5 and 7 are in the same position, so that antenna ports 0, 2, 4 and 6 are in the same column; antenna ports 1, 3, 5 and 7 are in the same column .
  • Antenna arrays E and F can be deduced by analogy.
  • a structure of the precoding matrix in the embodiment of the present invention may be Where W is a precoding matrix; ⁇ and ⁇ 2 are both matrices. In the embodiment of the present invention, the specific meanings of the matrices W i and W 2 are not limited.
  • X A®B; ® represents the Kronecker product, and A and B are a matrix of mxp and (n/ 2 )xq, respectively.
  • ⁇ and q are positive integers.
  • w 2 is a matrix of ( pq ) and r is the rank of the precoding matrix W.
  • 0 X , X A(x)B ; ® denotes the Kronecker product, and A and B are a matrix of ( m / 2 ) x P and ⁇ ⁇ 3 ⁇ 4 , respectively.
  • ⁇ and q are positive integers.
  • w 2 is a matrix of ( pq ) and r is the rank of the precoding matrix W.
  • ⁇ ® ⁇ ; ® represents the Kronecker product, and ⁇ and ⁇ are a matrix of mx P and ⁇ ⁇ 3 ⁇ 4 , respectively.
  • ⁇ and q are integers.
  • W 2 is a matrix of ( pq ) x and r is the rank of the precoding matrix W.
  • ⁇ ® ⁇ ; ⁇ denotes the Kronecker product, or ⁇ and ⁇ are a matrix of ⁇ ⁇ and mx q, respectively.
  • ⁇ and q are integers.
  • W 2 is a matrix of ( pq ) x and r is the rank of the precoding matrix W.
  • the PMI reported by the UE to the base station may include a first PMI and a second PMI.
  • the first PMI is used to indicate the matrix W i ; the second PMI is used to indicate the matrix W 2 .
  • the UE reporting the PMI to the base station includes: the UE reporting the first PMI and the second PMI to the base station, respectively.
  • the difference between the meanings of the matrix W i and the matrix W 2 may be considered, and the corresponding PMI may be reported to the base station independently, and the number of times and the frequency interval of the first PMI and the second PMI may be different, which is beneficial to the difference. Reduce the overhead of feedback.
  • FIG. 4 is a schematic structural diagram of a UE according to an embodiment of the present invention. As shown in Figure 4, the
  • the UE includes: an acquisition module 41, a receiving module 42, a selection module 43, and a transmitting module 44.
  • the obtaining module 41 is configured to obtain reference signal resource configuration information, where the reference signal resource configuration information includes antenna port configuration information, where the antenna port configuration information is used to indicate an antenna port structure.
  • the receiving module 42 is connected to the obtaining module 41, and configured to receive the reference signal sent by the base station according to the reference signal resource configuration information acquired by the obtaining module 41.
  • the selection module 43 is connected to the receiving module 42 and configured to select a precoding matrix from the codebook based on the reference signal received by the receiving module 42, and the structure of the precoding matrix and the antenna port configuration information indicate The antenna port structure corresponds.
  • the sending module 44 is connected to the selecting module 43 and configured to be used on the base station. ⁇ 11, the PMI is used to indicate a precoding matrix selected by the selection module 43.
  • the acquiring module 41 is specifically configured to receive the reference signal resource configuration information that is sent by the base station by using high layer signaling or dynamic signaling.
  • the high layer signaling may be RRC signaling or MAC layer signaling, but is not limited thereto.
  • the dynamic signaling may be a DCI transmitted through a PDCCH or an ePDCCH, but is not limited thereto.
  • the obtaining module 41 is specifically configured to obtain the reference signal resource configuration information according to a cell identifier (ID) of a cell where the UE is located.
  • ID cell identifier
  • the antenna port configuration information includes an index m and an index n; wherein, the index m corresponds to the number of rows in the antenna port structure, that is, the number of rows in the antenna array structure corresponding to the antenna port structure; n corresponds to the number of columns in the antenna port structure, that is, the number of columns in the antenna array structure corresponding to the antenna port structure.
  • the product of the index m and the index n is the number N of antenna ports.
  • W is a precoding matrix
  • w ⁇ P W 2 is a matrix.
  • the specific meanings of the matrices ⁇ and 2 are not limited.
  • 0 XX A(x)B ; ® denotes the Kronecker product, and A and B are a matrix of mxp and (n/ 2 )xq, respectively.
  • ⁇ and q are positive integers.
  • w 2 is a matrix of ( pq ) and r is the rank of the precoding matrix W.
  • ⁇ and ⁇ are a matrix of (m/ 2 )xp and nxq, respectively.
  • p and q are positive integers.
  • W 2 is a matrix and r is the rank of the precoding matrix W.
  • p and q are integers.
  • W 2 is a matrix of ( pq ) x and r is the rank of the precoding matrix W.
  • ⁇ and q are integers.
  • W 2 is a matrix of ( pq ) x and r is the rank of the precoding matrix W.
  • the PMI reported by the sending module 44 to the base station may include a first PMI and a second PMI.
  • the first PMI is used to indicate the matrix W i ; the second PMI is used to indicate the matrix W 2 .
  • the sending module 44 is specifically configured to report the first PMI and the second PMI to the base station, respectively.
  • the difference between the meanings of the matrix W i and the matrix W 2 may be considered, and the corresponding PMI may be reported to the base station independently, and the number of times and the frequency interval of the first PMI and the second PMI may be different, which is beneficial to the difference. Reduce the overhead of feedback, thereby increasing the throughput of the system.
  • the UE provided by the embodiment obtains reference signal resource configuration information including antenna port configuration information, receives a reference signal sent by the base station according to the reference signal resource configuration information, and selects from the codebook based on the received reference signal. a precoding matrix, and reporting, to the base station, a PMI indicating the selected precoding matrix, the antenna port configuration information indicating an antenna port structure, the structure of the precoding matrix corresponding to the antenna port structure, due to More information about the antenna port structure, and the structure of the precoding matrix corresponds to the antenna port structure indicated by the antenna port configuration information.
  • This feature allows the CSI measurement and reporting process to take into account both the horizontal and vertical directions of the AAS base station antenna.
  • the degree of freedom can improve the accuracy of CSI reporting or feedback, reduce the overhead of CSI reporting or feedback, and improve the capacity or throughput of data transmission, thereby increasing the capacity and coverage of the system. It is applicable to the scenario where the AAS base station antenna is deployed, and solves the problem of reporting CSI in the ASS base station scenario.
  • FIG. 5 is a schematic structural diagram of another UE according to an embodiment of the present invention. As shown in FIG. 5, the UE includes: a processor 51, a receiver 52, and a transmitter 53.
  • the processor 51 is configured to acquire reference signal resource configuration information, where the reference signal resource configuration information is
  • the antenna port configuration information is used to indicate the antenna port structure, and is used to select a precoding matrix from the codebook based on the reference signal received by the receiver 52, and the structure and structure of the precoding matrix The antenna port structure indicated by the antenna port configuration information corresponds.
  • the processor 51 may be a central processing unit (CPU), or an application specific integrated circuit (ASIC), or one or more configured to implement the embodiments of the present invention. integrated circuit.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the receiver 52 is configured to receive the reference signal sent by the base station according to the reference signal resource configuration information acquired by the processor 51.
  • the transmitter 53 is configured to report to the base station, where the UI is used to indicate a precoding matrix selected by the processor 51.
  • the processor 51 is specifically configured to control the receiver 52 to receive the reference signal resource configuration information that is sent by the base station by using high layer signaling or dynamic signaling.
  • the high layer signaling may be RRC signaling or MAC layer signaling, but is not limited thereto.
  • the dynamic signaling may be a DCI transmitted through a PDCCH or an ePDCCH, but is not limited thereto.
  • the processor 51 is specifically configured to obtain the reference signal resource configuration information according to the cell identifier (ID) of the cell where the UE is located.
  • the antenna port configuration information includes an index m and an index n; wherein, the index m corresponds to the number of rows in the antenna port structure, that is, the number of rows in the antenna array structure corresponding to the antenna port structure; n corresponds to the number of columns in the antenna port structure, that is, the number of columns in the antenna array structure corresponding to the antenna port structure.
  • the product of the index m and the index n is the number N of antenna ports.
  • W is a precoding matrix
  • W ⁇ P W 2 is a matrix.
  • the specific meanings of the matrix ⁇ and 2 are not limited.
  • 0 XX A(x) B ; ® represents the Kronecker product, and A and B are a matrix of mx P and /2 q , respectively.
  • ⁇ and q are positive integers.
  • W 2 is a matrix
  • r is the precoding matrix W X 0
  • 0 XX A(x)B ; ® denotes the Kronecker product, and A and B are a matrix of (m/ 2 )xp and nxq, respectively.
  • p and q are positive integers.
  • w 2 is a matrix of ( pq ) and r is the rank of the precoding matrix W.
  • ⁇ and q are integers.
  • W 2 is a matrix of ( pq ) x and r is the rank of the precoding matrix W.
  • p and q are integers.
  • W 2 is a matrix of ( pq ) x and r is the rank of the precoding matrix W.
  • the PMI reported by the transmitter 53 to the base station may include a first PMI and a second PMI.
  • the first PMI is used to indicate the matrix w i ; the second PMI is used to indicate the matrix w 2 .
  • the transmitter 53 can be specifically used to respectively send the first and second frames to the base station.
  • the difference between the meanings of the matrix W i and the matrix W 2 may be considered, and the corresponding PMI may be reported to the base station independently, and the number of times and the frequency interval of the first PMI and the second PMI may be different, which is beneficial to the difference. Reduce the overhead of feedback, thereby increasing the throughput of the system.
  • the UE may further include a memory 54.
  • the memory 54 is used to store a program.
  • the program can include program code, the program code including computer operating instructions.
  • the processor 51 is specifically configured to execute a program stored in the memory 54 to implement the foregoing functions.
  • the memory 54 may include a high speed RAM memory, and may also include a non-volatile memory such as at least one disk memory.
  • the receiver 52 and the transmitter 53 may be implemented by various communication modules of the UE, for example, a radio frequency (RF) module, a WiFi module, or the like.
  • RF radio frequency
  • the UE further includes: an input unit 55, a display unit 56, an audio circuit 57, a power source 58, and the like.
  • the input unit 55, the display unit 56, the audio circuit 57, and the power source 58 are connected to the processor 51, respectively.
  • the power source 58 is mainly used to supply power to the processor 51, and can also supply power to other modules, so that the power source 58 can be connected to other modules in addition to the processor 51 (not shown in Fig. 5).
  • the input unit 55 may include a touch panel or other input device; the display unit 56 may include a display panel or the like.
  • the UE provided by the embodiment obtains reference signal resource configuration information including antenna port configuration information, receives a reference signal sent by the base station according to the reference signal resource configuration information, and selects from the codebook based on the received reference signal. a precoding matrix, and reporting, to the base station, a PMI indicating the selected precoding matrix, the antenna port configuration information indicating an antenna port structure, the structure of the precoding matrix corresponding to the antenna port structure, due to More information about the antenna port structure, and the structure of the precoding matrix corresponds to the antenna port structure indicated by the antenna port configuration information.
  • This feature allows the CSI measurement and reporting process to take into account both the horizontal and vertical directions of the AAS base station antenna.
  • the degree of freedom can improve the accuracy of CSI reporting or feedback, reduce the overhead of CSI reporting or feedback, and improve the capacity or throughput of data transmission, thereby increasing the capacity and coverage of the system. It is applicable to the scenario where the AAS base station antenna is deployed, and solves the problem of reporting CSI in the ASS base station scenario.
  • FIG. 6 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in FIG. 6, the base station includes: a sending module 61 and a receiving module 62.
  • the sending module 61 is configured to send a reference signal to the UE, where the UE receives the reference signal based on the pre-acquired reference signal resource configuration information, where the reference signal resource configuration information includes antenna port configuration information, and the antenna port configuration Information is used to indicate the antenna port structure.
  • the receiving module 62 is configured to receive a PMI reported by the UE, where the PMI is used to indicate a precoding matrix selected by the UE, where the precoding matrix is selected by the UE from the codebook based on the reference signal,
  • the structure of the precoding matrix corresponds to the antenna port structure indicated by the antenna port configuration information.
  • the sending module 61 is further configured to send the reference signal resource configuration information to the UE by using high layer signaling or dynamic signaling.
  • the high layer signaling may be RRC signaling or MAC layer signaling, but is not limited thereto.
  • the dynamic signaling may be a DCI transmitted through a PDCCH or an ePDCCH, but is not limited thereto.
  • the antenna port configuration information includes an index m and an index n; wherein, the index m corresponds to the number of rows in the antenna port structure, that is, the number of rows in the antenna array structure corresponding to the antenna port structure; n corresponds to the number of columns in the antenna port structure, that is, the number of columns in the antenna array structure corresponding to the antenna port structure.
  • the product of the index m and the index n is the number of antenna ports N.
  • 0 X , X A®B; ® represents the Kronecker product, and A and B are a matrix of mxp and (n/ 2 )xq, respectively.
  • p and q are positive integers.
  • W 2 is a matrix of q ) x and r is the rank of the precoding matrix W.
  • 0 X , X A®B; ® represents the Kronecker product, and A and B are a matrix of (m/ 2 )xp and nxq, respectively.
  • p and q are positive integers.
  • W 2 is a matrix and r is the rank of the precoding matrix W.
  • p and q are integers.
  • W 2 is a matrix of ( pq ) x and r is the rank of the precoding matrix W.
  • p and q are integers.
  • w 2 is a matrix of ( pq ) x and r is the rank of the precoding matrix W.
  • the PMI received by the receiving module 62 may include a first PMI and a second PMI.
  • the first PMI is used to indicate the matrix W i ; the second PMI is used to indicate the matrix W 2 .
  • the receiving module 62 is specifically configured to receive, by the UE, the first PMI and the second PMI, respectively.
  • the difference between the meanings of the matrix W i and the matrix W 2 may be considered.
  • the base station receives the PMI reported by the UE independently, and allows the number of times of the first PMI and the second PMI to be reported, and the frequency interval to be different. It helps to reduce the overhead of CSI reporting or feedback, thereby increasing the throughput of the system.
  • the base station provided by the embodiment after transmitting the reference signal to the UE, receives the PMI reported by the UE for indicating the structure of the precoding matrix corresponding to the antenna port structure indicated by the antenna port configuration information, so that the CSI measurement and the reporting process are simultaneously considered.
  • the horizontal and vertical degrees of freedom of the AAS base station antenna can improve the accuracy of CSI reporting or feedback, reduce the overhead of CSI reporting or feedback, and improve the capacity or throughput of data transmission, thereby improving system capacity and coverage. . It is applicable to the scenario where the AAS base station antenna is deployed, and solves the problem of reporting CSI in the ASS base station scenario.
  • FIG. 7 is a schematic structural diagram of another base station according to an embodiment of the present invention. As shown in FIG. 7, the base station includes: a transmitter 71 and a receiver 72.
  • the transmitter 71 is configured to send a reference signal to the UE, where the UE receives the reference signal based on pre-acquired reference signal resource configuration information, where the reference signal resource configuration information includes antenna port configuration information, and the antenna port configuration Information is used to indicate the antenna port structure.
  • a receiver 72 configured to receive a PMI reported by the UE, where the PMI is used to indicate a precoding matrix selected by the UE, where the precoding matrix is selected by the UE from a codebook based on the reference signal,
  • the structure of the precoding matrix corresponds to the antenna port structure indicated by the antenna port configuration information.
  • the transmitter 71 is further configured to send the reference signal resource configuration information to the UE by using high layer signaling or dynamic signaling.
  • the high layer signaling may be RRC signaling or MAC layer signaling, but is not limited thereto.
  • the dynamic signaling may be a DCI transmitted through a PDCCH or an ePDCCH, but is not limited thereto.
  • the antenna port configuration information includes an index m and an index n; wherein, the index m corresponds to the number of rows in the antenna port structure, that is, the number of rows in the antenna array structure corresponding to the antenna port structure; n corresponds to the number of columns in the antenna port structure, that is, the number of columns in the antenna array structure corresponding to the antenna port structure.
  • the product of the index m and the index n is the number of antenna ports N.
  • 0 X , X A®B; ® represents the Kronecker product, and ⁇ and ⁇ are a matrix of mxp and (n/ 2 )xq, respectively.
  • p and q are positive integers.
  • W 2 is a matrix of q ) x and r is the rank of the precoding matrix W.
  • 0 X , X A®B; ® represents the Kronecker product, and A and B are a matrix of (m/ 2 )xp and nxq, respectively.
  • p and q are positive integers.
  • W 2 is a matrix and r is the rank of the precoding matrix W.
  • p and q are integers.
  • W 2 is a matrix of ( pq ) x and r is the rank of the precoding matrix W.
  • p and q are integers.
  • w 2 is a matrix of ( pq ) x and r is the rank of the precoding matrix W.
  • the PMI received by the receiver 72 may include a first PMI and a second PMI.
  • the first PMI is used to indicate the matrix W i ; the second PMI is used to indicate the matrix W 2 .
  • the receiving module 62 is specifically configured to receive, by the UE, the first PMI and the second PMI, respectively.
  • the difference between the meanings of the matrix W i and the matrix W 2 may be considered.
  • the base station receives the PMI reported by the UE independently, and allows the number of times of the first PMI and the second PMI to be reported, and the frequency interval to be different. It helps to reduce the overhead of CSI reporting or feedback, thereby increasing the throughput of the system.
  • the base station further includes: a memory 73 and a processor 74.
  • the memory 73 is used to store a program.
  • the program can include program code, the program code including computer operating instructions.
  • the memory 73 may include a high speed RAM memory, and may also include a non-volatile memory such as at least one disk memory.
  • the processor 74 is configured to execute a program stored in the memory 73 for implementing control logic of the base station and the like.
  • Processor 74 can be a CPU, or a specific ASIC, or one or more integrated circuits configured to implement embodiments of the present invention.
  • the transmitter 71, the receiver 72, the memory 73, and the processor 74 may be connected to each other through a bus and complete each other. Communication between.
  • the bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an Extended Industry Standard Architecture (EISA). Bus, etc.
  • ISA Industry Standard Architecture
  • PCI Peripheral Component
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is shown in Figure 7, but it does not mean that there is only one bus or one type of bus.
  • the processor 74 is integrated on a single chip, and the transmitter 71, the receiver 72, the memory 73, and the processor 74 can perform the same communication through the internal interface.
  • the base station provided by the embodiment after transmitting the reference signal to the UE, receives the PMI reported by the UE for indicating the structure of the precoding matrix corresponding to the antenna port structure indicated by the antenna port configuration information, so that the CSI measurement and the reporting process are simultaneously considered.
  • the horizontal and vertical degrees of freedom of the AAS base station antenna can improve the accuracy of CSI reporting or feedback, reduce the overhead of CSI reporting or feedback, and improve the capacity or throughput of data transmission, thereby improving system capacity and coverage. . It is applicable to the scenario where the AAS base station antenna is deployed, and solves the problem of reporting CSI in the ASS base station scenario.
  • the method includes the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例提供一种信道状态信息上报方法、接收方法及设备。上报方法包括:获取参考信号资源配置信息,参考信号资源配置信息中的天线端口配置信用于指示天线端口结构;根据参考信号资源配置信息,接收基站发送的参考信号;基于所接收的参考信号,从码本中选择一个预编码矩阵,预编码矩阵的结构与天线端口配置信息所指示的天线端口结构相对应;向基站上报用于指示所选择的预编码矩阵的PMI。本发明技术方案解决了ASS基站场景下上报CSI的问题,提高上报的CSI的精度。

Description

信道状态信息上报方法、 接收方法及设备 技术领域 本发明实施例涉及通信技术, 尤其涉及一种信道状态信息上报方法、 接 收方法及设备。 背景技术
通过发射预编码和接收合并, 多入多出 ( Multiple Input Multiple Output, 简称为 MIMO ) 系统可以得到分集和阵列增益。 利用预编码的 MIMO系统, 其接收信号可以表示为: y = H V s + n。其中 y是接收信号矢量, H是信道矩阵, V是预编码矩阵, s是发射的符号矢量, n是干扰与噪声矢量。 要想实现最优 预编码, 需要发射机完全已知信道状态信息(Channel State Information, 简称 为 CSI ) 。 现有长期演进(Long Term Evolution, 简称为 LTE ) R8-R11系统 中, CSI包括秩指示( Rank Indicator,简称为 RI )、预编码矩阵指示( Precoding Matrix Indicator, 简称为 PMI )和信道质量指示 ( Channel Quality Indicator, 简称为 CQI )信息等, 其中 RI和 PMI分别指示使用的层数和预编码矩阵。 通常称所使用的预编码矩阵的集合为码本,每个预编码矩阵为码本中的码字。 现有 LTE R8 -R11系统中的码本都是基于常规基站的天线设计, 常规基站的 天线具有固定或者远程电调的下倾角, 只有水平方向可以通过预编码或者波 束赋形动态调整其天线波束。
为了进一步提高频谱效率, 即将启动的 LTE R12系统开始考虑引入更多 的天线配置,特别是基于有源天线系统( Active antenna system, 简称为 AAS ) 的天线配置。 一方面, 有别于常规基站, AAS基站进一步提供了天线垂直向 的自由度, 这主要通过其水平和垂直向的二维天线阵列实现; 另一方面, 对 于 AAS基站而言, 可以考虑更多的天线端口, 例如目前考虑的天线端口数可以 是 8, 16, 32和 64。 此外, 即使相同数量的天线端口, 天线阵列结构也可能不同, 从而相同编号的天线端口, 在不同阵列结构中也可能得到不同的信道状态测量, 此 时需要 CSI上报或者反馈能够自适应天线阵列结构。 需要特别指出的是, 在设计 新的 LTE R12系统时, 后向兼容性也是一个重要的考虑, 例如要求配备 AAS 基站的 LTE R12系统能够保证 LTE R8- Rl 1的已有( legacy )用户设备 ( User Equipment, 简称为 UE ) 能够正常工作或者性能不会下降。 但是, 现有技术 天线端口配置信息以及上 CSI的方法特别是现有预编码矩阵的结构都无法 自适应 ASS基站天线配置的需求,于是需要提供一种适用于 ASS基站场景的 CSI上报方案, 用以提高 CSI的反馈精度, 从而充分发挥 AAS基站通过利用 水平和垂直向自由度提高系统容量和改进覆盖的优势。 发明内容 本发明实施例提供一种信道状态信息上报方法、 接收方法及设备, 用以 解决 ASS基站场景下上报 CSI的问题, 提高 CSI上报或反馈的精度。
第一方面提供一种信道状态信息上报方法, 包括:
获取参考信号资源配置信息, 所述参考信号资源配置信息包括天线端口 配置信息, 所述天线端口配置信息用于指示天线端口结构;
根据所述参考信号资源配置信息, 接收基站发送的参考信号;
基于所接收的参考信号, 从码本中选择一个预编码矩阵, 所述预编码矩 阵的结构与所述天线端口配置信息所指示的天线端口结构相对应;
向所述基站上报预编码矩阵指示 PMI, 所述 PMI用于指示所选择的预编 码矩阵。
结合第一方面, 在第一方面的第一种可能的实现方式中, 所述天线端口 配置信息包括索引 m和索引 n; 其中, 索引 m对应所述天线端口结构中的行 数, 索引 n对应所述天线端口结构中的列数。
结合第一方面的第一种可能的实现方式, 在第一方面的第二种可能的实 现方式中, 所述预编码矩阵的结构为 W = WiW2 ,
Figure imgf000004_0001
A(x) B ; ®表示克罗内克尔积, A和 B分别是一个 mx p和 (n / 2) x q的矩阵,或者 AB分别是一个 (m /2) x p和 nx q的矩阵; W2是 一个 (pq) x 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。 结合第一方面的第一种可能的实现方式, 在第一方面的第三种可能的实 现方式中, 所述预编码矩阵的结构为 W = WiW2 , 其中 W^AtgB; (8)表示克罗内克尔积, A和 B分别是一个 mxP和 nxq的 矩阵, 或者 A和 B分别是一个 ^ 和111^的矩阵, W2是一个 (pq)x/ "的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
结合第一方面的第二种可能的实现方式或第一方面的第三种可能的实现 方式, 在第一方面的第四种可能的实现方式中, 所述 PMI包括用于指示矩阵 Wi的第一 PMI和用于指示矩阵 w2的第二 PMI;
所述向所述基站上报预编码矩阵指示 PMI包括:
分别向所述基站上报所述第一 PMI和所述第二 PMI。
第二方面提供一种信道状态信息接收方法, 包括:
向用户设备发送参考信号, 其中, 所述用户设备基于预先获取的参考信 号资源配置信息接收所述参考信号, 所述参考信号资源配置信息包括天线端 口配置信息, 所述天线端口配置信息用于指示天线端口结构;
接收所述用户设备上报的预编码矩阵指示 PMI, 所述 PMI用于指示所述 用户设备选择的预编码矩阵, 所述预编码矩阵是所述用户设备基于所述参考 信号从码本中选择的, 所述预编码矩阵的结构与所述天线端口配置信息所指 示的天线端口结构相对应。
结合第二方面, 在第二方面的第一种可能的实现方式中, 所述天线端口 配置信息包括索引 m和索引 n; 其中, 索引 m对应所述天线端口结构中的行 数, 索引 n对应所述天线端口结构中的列数。
结合第二方面的第一种可能的实现方式, 在第二方面的第二种可能的实 现方式中, 所述预编码矩阵的结构为 W = WiW2 ,
Figure imgf000005_0001
A®B; ®表示克罗内克尔积, A和 B分别是一个 mxp和 (n/2)xq的矩阵,或者 A和 B分别是一个 (m/2)xP和 nxq的矩阵; W2是 一个 (pq)x 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。 结合第二方面的第一种可能的实现方式, 在第二方面的第三种可能的实 现方式中, 所述预编码矩阵的结构为 W = WiW2 ,
其中 W^AtgB; ®表示克罗内克尔积, A和 B分别是一个 mxP和 nxq的 矩阵, 或者 A和 B分别是一个 ^ 和111^的矩阵, W2是一个 (pq)x/ "的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
结合第二方面的第二种可能的实现方式或第二方面的第三种可能的实现 方式, 在第二方面的第四种可能的实现方式中, 所述 PMI包括用于指示矩阵 wi的第一 PMI和用于指示矩阵 w2的第二 PMI;
所述接收所述用户设备上报的预编码矩阵指示 PMI包括:
分别接收所述用户设备上报的所述第一 PMI和所述第二 PMI。
第三方面提供一种用户设备, 包括:
获取模块, 用于获取参考信号资源配置信息, 所述参考信号资源配置信 息包括天线端口配置信息, 所述天线端口配置信息用于指示天线端口结构; 接收模块, 用于根据所述获取模块获取的所述参考信号资源配置信息, 接收基站发送的参考信号;
选择模块, 用于基于所述接收模块接收的所述参考信号, 从码本中选择 一个预编码矩阵, 所述预编码矩阵的结构与所述天线端口配置信息所指示的 天线端口结构相对应;
发送模块, 用于向所述基站上报预编码矩阵指示 PMI, 所述 PMI用于指 示所述选择模块选择的预编码矩阵。
结合第三方面, 在第三方面的第一种可能的实现方式中, 所述天线端口 配置信息包括索引 m和索引 n; 其中, 索引 m对应所述天线端口结构中的行 数, 索引 n对应所述天线端口结构中的列数。
结合第三方面的第一种可能的实现方式, 在第三方面的第二种可能的实 现方式中, 所述预编码矩阵的结构为 W = WiW2 ,
Figure imgf000006_0001
A®B ; ®表示克罗内克尔积, A和 B分别是一个 mxp和 (n /2)xq的矩阵,或者 A和 B分别是一个 (m / 2)x P和 n xq的矩阵; W2是 一个 (pq)x 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。 结合第三方面的第一种可能的实现方式, 在第三方面的第三种可能的实 现方式中, 所述预编码矩阵的结构为 W = WiW2 ,
其中 W^ A tgB ; ®表示克罗内克尔积, A和 B分别是一个 m xP和 n xq的 矩阵, 或者 A和 B分别是一个 ^ 和111^的矩阵, W2是一个 (pq)x / "的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
结合第三方面的第二种可能的实现方式或第三方面的第三种可能的实现 方式, 在第三方面的第四种可能的实现方式中, 所述 PMI包括用于指示矩阵 wi的第一 PMI和用于指示矩阵 w2的第二 PMI;
所述发送模块具体用于分别向所述基站上报所述第一 PMI 和所述第二
PMI。
第四方面提供一种基站, 包括:
发送模块, 用于向用户设备发送参考信号, 其中, 所述用户设备基于预 先获取的参考信号资源配置信息接收所述参考信号, 所述参考信号资源配置 信息包括天线端口配置信息,所述天线端口配置信息用于指示天线端口结构; 接收模块,用于接收所述用户设备上报的预编码矩阵指示 PMI,所述 PMI 用于指示所述用户设备选择的预编码矩阵, 所述预编码矩阵是所述用户设备 基于所述参考信号从码本中选择的, 所述预编码矩阵的结构与所述天线端口 配置信息所指示的天线端口结构相对应。
结合第四方面, 在第四方面的第一种可能的实现方式中, 所述天线端口 配置信息包括索引 m和索引 n; 其中, 索引 m对应所述天线端口结构中的行 数, 索引 n对应所述天线端口结构中的列数。
结合第四方面的第一种可能的实现方式, 在第四方面的第二种可能的实 现方式中, 所述预编码矩阵的结构为 W = WiW2 ,
Figure imgf000007_0001
A(x)B ; ®表示克罗内克尔积, A和 B分别是一个 mxp和 (n /2)xq的矩阵,或者 A和 B分别是一个 (m / 2)x P和 n xq的矩阵; W2是 一个 (pq)x 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。 结合第四方面的第一种可能的实现方式, 在第四方面的第三种可能的实 现方式中, 所述预编码矩阵的结构为 W = WiW2 ,
其中 Wi = A ®B ; ®表示克罗内克尔积, A和 B分别是一个 m xP和 n xq的 矩阵, 或者 A和 B分别是一个 ^ 和111^的矩阵, W2是一个 (pq) 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
结合第四方面的第二种可能的实现方式或第四方面的第三种可能的实现 方式, 在第四方面的第四种可能的实现方式中, 所述 PMI包括用于指示矩阵 Wi的第一 PMI和用于指示矩阵 w2的第二 PMI;
所述接收模块具体用于分别接收所述用户设备上报的所述第一 PMI和所 述第二 PMI。
第五方面提供一种用户设备, 包括: 处理器、 接收器和发射器; 所述处理器, 用于获取参考信号资源配置信息, 所述参考信号资源配置 信息包括天线端口配置信息,所述天线端口配置信息用于指示天线端口结构, 并用于基于所述接收器接收的参考信号, 从码本中选择一个预编码矩阵, 所 述预编码矩阵的结构与所述天线端口配置信息所指示的天线端口结构相对 应;
所述接收器, 用于根据所述处理器获取的所述参考信号资源配置信息, 接收基站发送的所述参考信号;
所述发射器, 用于向所述基站上报预编码矩阵指示 PMI, 所述 PMI用于 指示所述处理器选择的预编码矩阵。
第六方面提供一种基站, 包括:
发射器, 用于向用户设备发送参考信号, 其中, 所述用户设备基于预先 获取的参考信号资源配置信息接收所述参考信号, 所述参考信号资源配置信 息包括天线端口配置信息, 所述天线端口配置信息用于指示天线端口结构; 接收器, 用于接收所述用户设备上报的预编码矩阵指示 PMI, 所述 PMI 用于指示所述用户设备选择的预编码矩阵, 所述预编码矩阵是所述用户设备 基于所述参考信号从码本中选择的, 所述预编码矩阵的结构与所述天线端口 配置信息所指示的天线端口结构相对应。
本发明实施例提供的信道状态信息上报方法、 接收方法及用户设备, 通 过获取包括天线端口配置信息在内的参考信号资源配置信息, 根据该参考信 号资源配置信息, 接收基站发送的参考信号, 基于所接收的参考信号, 从码 本中选择预编码矩阵, 并向基站上报用于指示所选择的预编码矩阵的 PMI, 所述天线端口配置信息指示了天线端口结构, 所述预编码矩阵的结构与所述 天线端口结构相对应。 在本发明实施例中, 提供了更多有关天线端口结构的 信息, 并且预编码矩阵的结构与天线端口配置信息所指示的天线端口结构相 对应,这一特征使得 CSI测量以及上报过程同时考虑了 AAS基站天线水平向 和垂直向的自由度, 从而能够提高 CSI上报或反馈的精度, 适用于存在 AAS 基站天线部署的场景, 解决了 ASS基站场景下 CSI的上报问题。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实 施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见地, 下 面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲, 在 不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 la为本发明实施例提供的一种信道状态信息上报方法的流程图; 图 lb为本发明实施例提供的一种信道状态信息接收方法的流程图; 图 2a-图 2c为本发明实施例提供的均匀线性阵列的结构示意图; 图 4为本发明实施例提供的一种 UE的结构示意图;
图 5为本发明实施例提供的另一种 UE的结构示意图;
图 6为本发明实施例提供的一种基站的结构示意图;
图 7为本发明实施例提供的另一种基站的结构示意图。 具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发 明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于 本发明中的实施例, 本领域普通技术人员在没有作出创造性劳动前提下所获 得的所有其他实施例, 都属于本发明保护的范围。
图 la为本发明实施例提供的一种信道状态信息上报方法的流程图。如图 la所示, 所述方法包括:
101、 获取参考信号资源配置信息, 所述参考信号资源配置信息包括天线 端口配置信息, 所述天线端口配置信息用于指示天线端口结构。
102、 根据所述参考信号资源配置信息, 接收基站发送的参考信号。
在本实施例中, UE为了接收基站发送的参考信号, 首先获取参考信号资 源配置信息, 然后基于参考信号资源配置信息接收基站发送的参考信号。 在本实施例中, 所述参考信号资源配置信息除了包括天线端口配置信息 之外, 还包括参考信号对应的子帧配置 (例如参考信号的子帧周期和子帧偏 移量)和参考信号占用的资源单元( Resource Element, 简称为 RE )等。 UE 具体在所述参考信号资源配置信息指示的子帧和所述资源单元上接收基站发 送的参考信号。 在此说明, 所述参考信号的个数与所述天线端口配置信息所 指示的天线端口个数相同。 在本实施例中, 所述天线端口配置信息所指示的 天线端口结构提供了比天线端口个数更丰富的天线端口信息。
在本实施例的一可选实施方式中, 所述获取参考信号资源配置信息的方 式包括: UE接收基站通过高层信令或动态信令发送的所述参考信号资源配置 信息。 其中, 高层信令可以是无线资源控制(Radio Resource Control, 简称为 RRC )信令或者媒体接入控制( Media Access Control, 简称为 MAC )层信令, 但不限于此。 动态信令可以是通过物理下行控制信道 (Physical Downlink Control Channel, 简称为 PDCCH )或者增强的 PDCCH ( enhanced PDCCH, 简称为 ePDCCH )发送的下行控制信息( Downlink Control Information, 简称 为 DCI ) , 但不限于此。
在本实施例的另一可选实施方式中, 所述获取参考信号资源配置信息的 方式包括: UE根据所在小区的小区标识 ( ID )得到所述参考信号资源配置信 息。 例如, UE可以通过接收广播或者组播消息得到与各个小区 ID对应的参 考信号资源配置, 然后基于本小区 ID, 获得与本小区 ID对应的所述参考信 号资源配置信息。
103、 基于所接收的参考信号, 从码本中选择一个预编码矩阵, 所述预编 码矩阵的结构与所述天线端口配置信息所指示的天线端口结构相对应。
具体地, 所述基于所接收的参考信号, 从码本中选择一个预编码矩阵, 包括:
基于所接收的参考信号进行信道估计, 例如可以利用最小二乘方法或者 最小均方误差准则, 从所接收的参考信号得到信道估计值;
利用所得到的信道估计值,基于预定义的准则, 例如容量或者吞吐量或者 互信息最大化准则从码本中选择预编码。 利用信道估计和预定义的准则选择 预编码矩阵是已有技术, 此处不赘述。
在本实施例中, 预编码矩阵的结构与天线端口配置信息所指示的天线端 口结构相对应。 也就是说, 预编码矩阵的结构不仅与天线端口个数有关, 而 且还与天线端口结构有关。 如果天线端口个数相同, 但天线端口结构不同, 则对应的预编码矩阵的结构会有所不同。 预编码矩阵的结构与天线端口配置 信息所指示的天线端口结构相对应, 可以是预编码矩阵的结构与天线端口配 置相对应, 从而与其所指示的天线端口结构相对应。 由此可见, 本实施例中 预编码矩阵的结构能够自适应天线端口结构从而提高 CSI反馈或者上报的精 度。
104、 向所述基站上报 PMI, 所述 PMI用于指示所选择的预编码矩阵。 当 UE从码本中选择出预编码矩阵之后, 为便于实现发射预编码技术, 向基站上报用于指示所选择的预编码矩阵的 PMI。
在此说明,在步骤 104中, UE除了可以向基站上报用于指示所选择的预 编码矩阵的 PMI之外,还可以向基站上报其它 CSI信息, 例如 RI和 /或 CQI。
在本实施例的可选实施方式中, 所述向所述基站 CSI包括 PMI的方式包 括: UE 通过物理上行控制信道 ( Physical Uplink Control Channel , 简称 PUCCH ) 或者物理上行共享信道 ( Physical Uplink Shared Channel , 简称 PUSCH ) 向基站上报 CSI包括 PMI, 但不限于此。
在此说明, 除了上述步骤之外, UE还可以接收基站发送的数据信号, 其 中所述数据信号由基站根据 UE所上报的 PMI得到预编码矩阵并对数据进行 预编码后发送。 例如通过物理下行共享信道 (Physical Downlink Shared Channel, 简称 PDSCH )接收基站发送的预编码之后的数据信号。
基站接收到所述 PMI并从码本中得到 UE所选择的预编码矩阵, 由于所 述预编码矩阵的结构能够自适应天线端口结构从而提高了 CSI反馈或者上报 的精度, 基站利用所述预编码矩阵对数据进行预编码并发送给 UE可以提高 数据传输的容量和可靠性, 从而提高了系统的吞吐量和覆盖。 此外, 自适应 于不同天线端口结构的预编码矩阵可以构成不同的码本, 从而可以基于上述 天线端口配置信息仅针对其所指示的天线端口结构上报或者反馈 PMI, 从而 有效降低 CSI上报或者反馈的开销。 与之对比, 如果仅通知天线端口数, 由 于相同天线端口数而可能存在的多种天线端口结构, 码本中包含的预编码矩 阵是多种天线端口或者阵列结构的预编码矩阵的并集, 这种混合设计将导致 较大的码本从而使得反馈开销过大。 需要指出的是, 所述天线端口结构, 可以是天线阵列结构。
对于 ASS基站部署的场景, 由于同时考虑了天线垂直向和水平方向的设 计自由度, 使得天线阵列的结构有了更多变化, 则对应的天线端口结构也就 相应有了更多变化, 即使相同数量的天线端口, 天线阵列结构也可能不同, 从而相同编号的天线端口, 在不同阵列结构中也可能得到不同的信道状态测 量。 而在本实施例提供的方法中, 通过获取与天线端口结构相对应的预编码 矩阵, 并向基站上报用于指示所选择的预编码矩阵的 PMI, 使得所选择的预 编码矩阵能够自适应天线阵列结构或天线端口结构, 从而提高 CSI上报或者 反馈的精度, 降低了 CSI上报或者反馈的开销, 提高了数据传输的容量或者 吞吐量, 从而提高了系统的容量和覆盖。 适用于 ASS基站部署的场景, 解决 了 ASS基站场景下 CSI的上报问题。
图 lb为本发明实施例提供的一种信道状态信息接收方法的流程图。如图 lb所示, 所述方法包括:
201、 向 UE发送参考信号, 其中, 所述 UE基于预先获取的参考信号资 源配置信息接收所述参考信号, 所述参考信号资源配置信息包括天线端口配 置信息, 所述天线端口配置信息用于指示天线端口结构。
在本实施例中, UE为了接收基站发送的参考信号, 首先获取参考信号资 源配置信息, 然后基于参考信号资源配置信息接收基站发送的参考信号。 在 此说明, 基站发送的参考信号的个数与所述天线端口配置信息所指示的天线 端口个数相同。
在本实施例中, 所述参考信号资源配置信息除了包括天线端口配置信息 之外, 还包括参考信号对应的子帧配置, 例如参考信号的子帧周期和子帧偏 移量, 以及参考信号占用的 RE等。 UE具体在所述参考信号资源配置信息指 示的子帧和所述资源单元上接收基站发送的参考信号。
在一可选实施方式中, 基站向 UE发送参考信号之前, 通过高层信令或 动态信令向 UE发送所述参考信号资源配置信息。其中,高层信令可以是 RRC 信令或者 MAC 层信令, 但不限于此。 动态信令可以是通过 PDCCH 或者 ePDCCH发送的 DCI, 但不限于此。
除接收基站发送的所述参考信号资源配置信息之外, UE还可以根据所在 小区的小区标识(ID )得到所述参考信号资源配置信息, 基站可以通过广播 或者组播方式通知 UE与各个小区 ID对应的参考信号资源配置。
202、接收 UE上报的 PMI, 所述 PMI用于指示所述 UE选择的预编码矩 阵, 所述预编码矩阵是所述 UE基于所述参考信号从码本中选择的, 所述预 编码矩阵的结构与所述天线端口配置信息所指示的天线端口结构相对应。 预 编码矩阵的结构与天线端口配置信息所指示的天线端口结构相对应, 可以是 预编码矩阵的结构与天线端口配置相对应, 从而与其所指示的天线端口结构 相对应。
基站向 UE发送参考信号之后, 等待 UE上报的 PMI。 UE接收到参考信 号之后, 基于所接收的参考信号, 从码本中选择一个预编码矩阵, 具体的, UE基于所接收的参考信号进行信道估计,例如可以利用最小二乘方法或者最 小均方误差准则, 从所接收的参考信号得到信道估计值; 然后利用所得到的 信道估计值, 基于预定义的准则, 例如容量或者吞吐量或者互信息最大化准 则从码本中选择预编码。 利用信道估计和预定义的准则选择预编码矩阵是已 有技术, 此处不赘述。
UE选择出预编码矩阵之后,向基站发送用于指示所选择的预编码矩阵的
PMI。 基站接收 UE上报的 PMI。
在此说明, 在步骤 202中, 基站除了接收 UE上报的用于指示所选择的 预编码矩阵的 PMI之外, 还可以接收其它 CSI信息, 例如 RI和 /或 CQI。
在本实施例的可选实施方式中, 所述基站接收 UE上报 CSI包括 PMI的 方式包括: 基站通过物理上行控制信道(Physical Uplink Control Channel, 简 称 PUCCH )或者物理上行共享信道 ( Physical Uplink Shared Channel, 简称 PUSCH )接收 UE上报 CSI包括 PMI, 但不限于此。
在此说明, 除了上述步骤之外, 基站还可以根据 UE所上报的 PMI得到 预编码矩阵并利用所得到的预编码矩阵对待向 UE发送的数据进行预编码后 发送。 例如通过 PDSCH向 UE发送预编码之后的数据信号。
基站接收到所述 PMI并从码本中得到 UE所选择的预编码矩阵, 由于所 述预编码矩阵的结构能够自适应天线端口结构从而提高了 CSI反馈或者上报 的精度, 基站利用所述预编码矩阵对数据进行预编码并发送给 UE可以提高 数据传输的容量和可靠性, 从而提高了系统的吞吐量和覆盖。 此外, 自适应 于不同天线端口结构的预编码矩阵可以构成不同的码本, 从而可以基于上述 天线端口配置信息仅针对其所指示的天线端口结构上报或者反馈 PMI, 从而 有效降低 CSI上报或者反馈的开销。
需要指出的是, 所述天线端口结构, 可以是天线阵列结构。
在本实施例中, 所述天线端口配置信息所指示的天线端口结构, 提供比 天线端口个数更加丰富的天线端口信息。 UE选择的预编码矩阵的结构与天线 端口配置信息所指示的天线端口结构相对应。也就是说, UE选择的预编码矩 阵的结构不仅与天线端口个数有关, 而且还与天线端口结构有关。 如果天线 端口个数相同, 但天线端口结构不同, 则对应的预编码矩阵的结构会有所不 同。 预编码矩阵的结构与天线端口配置信息所指示的天线端口结构相对应, 可以是预编码矩阵的结构与天线端口配置相对应, 从而与其所指示的天线端 口结构相对应。 由此可见, 本实施例中预编码矩阵的结构能够自适应天线端 口结构从而提高 CSI反馈或者上报的精度。
在本实施例中, 提供了更多有关天线端口结构的信息, 并且预编码矩阵 的结构与天线端口配置信息所指示的天线端口结构相对应,这一特征使得 CSI 测量以及上报过程同时考虑了 AAS基站天线水平向和垂直向的自由度,从而 能够提高 CSI上报的精度或者减少反馈的开销。 基站利用所述预编码矩阵对 数据进行预编码并发送给 UE可以提高数据传输的容量和可靠性, 从而提高 了系统的吞吐量和覆盖。适用于存在 AAS基站天线部署的场景,解决了 ASS 基站场景下 CSI的上报问题。
本发明以下实施例将以 ASS基站部署的场景为例, 对本发明技术方案中 的预编码矩阵以及天线端口结构进行详细说明。
通常, 一个参考信号往往与一个物理天线或者虚拟天线相对应, 其中虚 拟天线可以通过多个物理天线的加权组合得到。 实际的天线部署可能具有不 同的天线配置和天线阵列形式。如图 2b所示,天线阵列 B为 2行 8列的均匀 线阵; 如图 2c所示, 天线阵列 C为 4行 4列的均匀线阵; 尽管天线阵列 B 与阵列 C都具有 16个天线端口, 但是其阵列形式却不同。 再如图 3b所示, 天线阵列 E为 2行 4列的交叉极化天线阵列; 如图 3c所示, 天线阵列 F为 4 行 2列的交叉极化天线阵列, 其中不同的极化天线可以处于相同的列; 尽管 天线阵列 E与天线阵列 F都具有 16个天线端口,但是其天线阵列形式也不同。 其中, 不同天线阵列对应不同的天线端口结构, 天线端口结构与天线阵列结 构——对应。 如图 2b和图 2c所示, 天线端口结构分别为 2 X 8和 4 X 4。 可选的, 本发明实施例中天线端口配置信息包括索引 m和索引 n; 其中, 索引 m对应天线端口结构中的行数, 也就是天线端口结构对应的天线阵列结 构中的行数; 索引 n对应天线端口结构中的列数, 也就是天线端口结构对应 的天线阵列结构中的列数。 而索引 m和索引 n的乘积为天线端口个数N。
以图 2a-图 2c所示的各个均匀线性阵列为例, 天线阵列 A、 B、 C对应的 索引分别为 (m, n) =(2, 4)、 (m, n) =(2, 8)、 ( m, n) =(4, 4); 以图 3a-图 3c所示的各个交叉极化天线阵列为例, 天线阵列 D、 E、 F对应的索引 分别为 (m, n) =(2, 4)、 (m, n) =(2, 8)、 (m, n) =(4, 4); 其中, 两组 不同极化天线可以位于同一列的位置。 例如, 以天线阵列 D为例, (0, 1, 4, 5)为 45° 极化的同极化天线组; (2, 3, 6, 7)为 -45° 极化的同极化天 线组; 0与 2、 1与 3、 4与 6、 5与 7位于相同的位置, 从而天线端口 0, 2, 4和 6位于相同的列; 天线端口 1 , 3 , 5和 7位于相同的列。 天线阵列 E和 F 可以依此类推。
基于上述天线端口配置, 本发明实施例中的预编码矩阵的一种结构可以 是
Figure imgf000015_0001
其中, W为预编码矩阵; ^和\¥2都是矩阵, 在本发明实施例 中, 对矩阵 Wi和 W2的具体含义不做限定。
W, =
可选的, X = A®B; ®表示克罗内克尔积, A和 B分别是 一个 mxp和 (n/2)xq的矩阵。具体地,以 16个天线为例,阵列结构表示为 m=2, n=8, 则 A和 B分别是一个 Ρ和一个 4xq的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 4xP和一个 的矩阵。 其中, ρ和 q是正整数。 相应的, w2是一个 (pq) 的矩阵, r为所述预编码矩阵 W的 秩。
X 0
W, =
或者, 0 X , X = A(x)B; ®表示克罗内克尔积, A和 B分别是一 个 (m/2)xP和 ηχ¾的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=4, n=8, 则 A和 B分别是一个 Ρ和一个 9的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 2xP和一个 4x 的矩阵。 其中, ρ和 q是正整数。 相应的, w2是一个 (pq) 的矩阵, r为所述预编码矩阵 W的 秩。 在一可选实施方式中, ^®Β; ®表示克罗内克尔积, Α和 Β分别是 一个 mxP和 ηχ¾的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=2, n=8, 则 A和 B分别是一个 Ρ和一个 9的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 4xP和一个 的矩阵。 其中, ρ和 q是整数。相应的, W2是一个 (pq)x 的矩阵, r为所述预编码矩阵 W的秩。
或者, ^=Α®Β; Ο表示克罗内克尔积, 或者 Α和 Β分别是一个 ηχΡ和 mxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=2, n=8, 则 A 和 B分别是一个 Ρ和一个 2xq的矩阵。 以 16个天线为例, 阵列结构表示为 m=4, n=4, 则 A和 B分别是一个 4xP和一个 的矩阵。 其中, ρ和 q是整 数。 相应的, W2是一个 (pq)x 的矩阵, r为所述预编码矩阵 W的秩。
基于上述实施方式, UE向基站上报的 PMI可以包括第一 PMI和第二 PMI。 第一 PMI用于指示矩阵 Wi; 第二 PMI用于指示矩阵 W2。 基于此, UE 向基站上报 PMI包括: UE分别向基站上报第一 PMI和第二 PMI。 在该实施 方式中, 可以考虑矩阵 Wi和矩阵 W2所标识含义的不同, 独立向基站上报对应 的 PMI, 允许上报第一 PMI和第二 PMI的次数以及频率间隔等有所不同,有 利于降低反馈的开销。
图 4为本发明实施例提供的一种 UE的结构示意图。 如图 4所示, 所述
UE包括: 获取模块 41、 接收模块 42、 选择模块 43和发送模块 44。
获取模块 41, 用于获取参考信号资源配置信息, 所述参考信号资源配置 信息包括天线端口配置信息,所述天线端口配置信息用于指示天线端口结构。
接收模块 42, 与获取模块 41连接, 用于根据获取模块 41获取的所述参 考信号资源配置信息, 接收基站发送的参考信号。
选择模块 43, 与接收模块 42连接, 用于基于接收模块 42接收的所述参 考信号, 从码本中选择一个预编码矩阵, 所述预编码矩阵的结构与所述天线 端口配置信息所指示的天线端口结构相对应。
发送模块 44, 与选择模块 43连接, 用于向基站上4艮?^11, 所述 PMI用 于指示选择模块 43选择的预编码矩阵。 在一可选实施方式中,获取模块 41具体可用于接收基站通过高层信令或 动态信令发送的所述参考信号资源配置信息。 其中, 高层信令可以是 RRC信 令或者 MAC层信令,但不限于此。动态信令可以是通过 PDCCH或者 ePDCCH 发送的 DCI, 但不限于此。
在一可选实施方式中, 获取模块 41具体可用于根据所述 UE所在小区的 小区标识(ID)得到所述参考信号资源配置信息。
在一可选实施方式中, 所述天线端口配置信息包括索引 m和索引 n; 其 中, 索引 m对应天线端口结构中的行数, 也就是天线端口结构对应的天线阵 列结构中的行数; 索引 n对应天线端口结构中的列数, 也就是天线端口结构 对应的天线阵列结构中的列数。而索引 m和索引 n的乘积为天线端口个数N。
基于上述, 本实施例中的预编码矩阵的一种结构可以是 W = WiW2。 其中, W为预编码矩阵; w^PW2都是矩阵。 在本发明实施例中, 对矩阵 ^和 2的 具体含义不做限定。
X 0
可选的, 0 X X = A(x)B; ®表示克罗内克尔积, A和 B分别是 一个 mxp和 (n/2)xq的矩阵。具体地,以 16个天线为例,阵列结构表示为 m=2, n=8, 则 A和 B分别是一个 Ρ和一个 的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 4xP和一个 的矩阵。 其中, ρ和 q是正整数。 相应的, w2是一个 (pq) 的矩阵, r为所述预编码矩阵 W的 秩。
X 0
W,
或者, 0 X , Χ = Α(χ)Β; ®表示克罗内克尔积, Α和 Β分别是一 个 (m/2)xp和 nxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=4, n=8, 则 A和 B分别是一个 Ρ和一个 9的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 2xP和一个 4xq的矩阵。 其中, p和 q是正整数。 相应的, W2是一个 的矩阵, r为所述预编码矩阵 W的 秩。 在一可选实施方式中, ^®Β; ②表示克罗内克尔积, Α和 Β分别是 一个 mxp和 nxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=2, n=8, 则 A和 B分别是一个 Ρ和一个 9的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 4xP和一个 4xq的矩阵。 其中, p和 q是整数。相应的, W2是一个 (pq)x 的矩阵, r为所述预编码矩阵 W的秩。
或者, ^=Α®Β; ®表示克罗内克尔积, 或者 Α和 Β分别是一个 ηχΡ和 mxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=2, n=8, 则 A 和 B分别是一个 Ρ和一个 2xq的矩阵。 以 16个天线为例, 阵列结构表示为 m=4, n=4, 则 A和 B分别是一个 4xP和一个 的矩阵。 其中, ρ和 q是整 数。 相应的, W2是一个 (pq)x 的矩阵, r为所述预编码矩阵 W的秩。
基于上述实施方式, 发送模块 44向基站上报的 PMI可以包括第一 PMI 和第二 PMI。 第一 PMI用于指示矩阵 Wi ; 第二 PMI用于指示矩阵 W2。 基于 此, 发送模块 44具体可用于分别向基站上报第一 PMI和第二 PMI。 在该实 施方式中, 可以考虑矩阵 Wi和矩阵 W2所标识含义的不同,独立向基站上报对 应的 PMI, 允许上报第一 PMI和第二 PMI的次数以及频率间隔等有所不同, 有利于降低反馈的开销, 从而提高系统的吞吐量。
本实施例提供的 UE,通过获取包括天线端口配置信息在内的参考信号资 源配置信息, 根据该参考信号资源配置信息, 接收基站发送的参考信号, 基 于所接收的参考信号, 从码本中选择预编码矩阵, 并向基站上报用于指示所 选择的预编码矩阵的 PMI, 所述天线端口配置信息指示了天线端口结构, 所 述预编码矩阵的结构与所述天线端口结构相对应, 由于提供了更多有关天线 端口结构的信息, 并且预编码矩阵的结构与天线端口配置信息所指示的天线 端口结构相对应,这一特征使得 CSI测量以及上报过程同时考虑了 AAS基站 天线水平向和垂直向的自由度, 从而能够提高 CSI上报或反馈的精度, 降低 了 CSI上报或反馈的开销, 提高了数据传输的容量或者吞吐量, 从而提高了 系统的容量和覆盖。 适用于存在 AAS基站天线部署的场景, 解决了 ASS基 站场景下 CSI的上报问题。
图 5为本发明实施例提供的另一种 UE的结构示意图。 如图 5所示, 所 述 UE包括: 处理器 51、 接收器 52和发射器 53。
处理器 51, 用于获取参考信号资源配置信息, 所述参考信号资源配置信 息包括天线端口配置信息, 所述天线端口配置信息用于指示天线端口结构, 并用于基于接收器 52接收的参考信号, 从码本中选择一个预编码矩阵, 所述 预编码矩阵的结构与所述天线端口配置信息所指示的天线端口结构相对应。
处理器 51可以是一个中央处理器( Central Processing Unit,简称为 CPU ), 或者是特定集成电路 ( Application Specific Integrated Circuit, 简称为 ASIC ) , 或者是被配置成实施本发明实施例的一个或多个集成电路。
接收器 52, 用于根据处理器 51 获取的所述参考信号资源配置信息, 接 收基站发送的所述参考信号。
发射器 53 , 用于向基站上报 ΡΜΙ, 所述 ΡΜΙ用于指示处理器 51选择的 预编码矩阵。
在一可选实施方式中, 处理器 51具体可用于控制接收器 52接收基站通 过高层信令或动态信令发送的所述参考信号资源配置信息。 其中, 高层信令 可以是 RRC 信令或者 MAC 层信令, 但不限于此。 动态信令可以是通过 PDCCH或者 ePDCCH发送的 DCI, 但不限于此。
在一可选实施方式中, 处理器 51具体可用于根据所述 UE所在小区的小 区标识(ID )得到所述参考信号资源配置信息。
在一可选实施方式中, 所述天线端口配置信息包括索引 m和索引 n; 其 中, 索引 m对应天线端口结构中的行数, 也就是天线端口结构对应的天线阵 列结构中的行数; 索引 n对应天线端口结构中的列数, 也就是天线端口结构 对应的天线阵列结构中的列数。而索引 m和索引 n的乘积为天线端口个数N。
基于上述, 本实施例中的预编码矩阵的一种结构可以是 W = W1W2。 其中, W为预编码矩阵; W^P W2都是矩阵, 在本发明实施例中, 对矩阵 ^和 2的 具体含义不做限定。
X 0
可选的, 0 X X = A(x) B ; ®表示克罗内克尔积, A和 B分别是 一个 m xP和 /2 q的矩阵。具体地,以 16个天线为例,阵列结构表示为 m=2, n=8, 则 A和 B分别是一个 Ρ和一个 的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 4x P和一个 的矩阵。 其中, ρ和 q是正整数。 相应的, W2是一个 的矩阵, r为所述预编码矩阵 W的 X 0
w,
或者, 0 X X = A(x)B; ®表示克罗内克尔积, A和 B分别是一 个 (m/2)xp和 nxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=4, n=8, 则 A和 B分别是一个 Ρ和一个 9的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 2xP和一个 4xq的矩阵。 其中, p和 q是正整数。 相应的, w2是一个 (pq) 的矩阵, r为所述预编码矩阵 W的 秩。 在一可选实施方式中, ^®Β; ②表示克罗内克尔积, Α和 Β分别是 一个 mxp和 nxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=2, n=8, 则 A和 B分别是一个 Ρ和一个 9的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 4xP和一个 的矩阵。 其中, ρ和 q是整数。相应的, W2是一个 (pq)x 的矩阵, r为所述预编码矩阵 W的秩。
或者, ^=Α®Β; (8)表示克罗内克尔积, 或者 Α和 Β分别是一个 ηχΡ和 mxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=2, n=8, 则 A 和 B分别是一个 Ρ和一个 2xq的矩阵。 以 16个天线为例, 阵列结构表示为 m=4, n=4, 则 A和 B分别是一个 4xP和一个 2xq的矩阵。 其中, p和 q是整 数。 相应的, W2是一个 (pq)x 的矩阵, r为所述预编码矩阵 W的秩。
基于上述实施方式, 发射器 53向基站上报的 PMI可以包括第一 PMI和 第二 PMI。 第一 PMI用于指示矩阵 wi ; 第二 PMI用于指示矩阵 w2。基于此, 发射器 53具体可用于分别向基站上 ·艮第一 ΡΜΙ和第二 ΡΜΙ。 在该实施方式 中, 可以考虑矩阵 Wi和矩阵 W2所标识含义的不同, 独立向基站上报对应的 PMI, 允许上报第一 PMI和第二 PMI的次数以及频率间隔等有所不同, 有利 于降低反馈的开销, 从而提高系统的吞吐量。
进一步, 如图 5所示, 所述 UE还可以包括存储器 54。 存储器 54, 用于 存储程序。 具体地, 程序可以包括程序代码, 所述程序代码包括计算机操作 指令。 可选的, 处理器 51具体可用于执行存储器 54存储的程序, 来实现上 述功能。 存储器 54 可以包含高速 RAM存储器, 也可以包括非易失性存储器 ( non-volatile memory ) , 例如至少一个磁盘存储器。
在实现上, 接收器 52和发射器 53可由所述 UE的各种通信模块实现, 例如可以是射频(Radio Frequency, 简称为 RF )模块、 WiFi模块等。
进一步, 如图 5所示, 所述 UE还包括: 输入单元 55、 显示单元 56、 音 频电路 57和电源 58等。 其中, 输入单元 55、 显示单元 56、 音频电路 57和 电源 58分别与处理器 51连接。 电源 58主要用于向处理器 51供电, 还可以 向其他模块供电, 故电源 58除了与处理器 51连接之外, 还可以与其他模块 连接 (图 5未示出 )。 输入单元 55可以包括触控面板或其他输入设备; 显示 单元 56可以包括显示面板等。
本实施例提供的 UE,通过获取包括天线端口配置信息在内的参考信号资 源配置信息, 根据该参考信号资源配置信息, 接收基站发送的参考信号, 基 于所接收的参考信号, 从码本中选择预编码矩阵, 并向基站上报用于指示所 选择的预编码矩阵的 PMI, 所述天线端口配置信息指示了天线端口结构, 所 述预编码矩阵的结构与所述天线端口结构相对应, 由于提供了更多有关天线 端口结构的信息, 并且预编码矩阵的结构与天线端口配置信息所指示的天线 端口结构相对应,这一特征使得 CSI测量以及上报过程同时考虑了 AAS基站 天线水平向和垂直向的自由度, 从而能够提高 CSI上报或反馈的精度, 降低 了 CSI上报或反馈的开销, 提高了数据传输的容量或者吞吐量, 从而提高了 系统的容量和覆盖。 适用于存在 AAS基站天线部署的场景, 解决了 ASS基 站场景下 CSI的上报问题。
图 6为本发明实施例提供的一种基站的结构示意图。 如图 6所示, 所述 基站包括: 发送模块 61和接收模块 62。
发送模块 61 , 用于向 UE发送参考信号, 其中, 所述 UE基于预先获取 的参考信号资源配置信息接收所述参考信号, 所述参考信号资源配置信息包 括天线端口配置信息, 所述天线端口配置信息用于指示天线端口结构。
接收模块 62, 用于接收所述 UE上报的 PMI, 所述 PMI用于指示所述 UE选择的预编码矩阵, 所述预编码矩阵是所述 UE基于所述参考信号从码本 中选择的, 所述预编码矩阵的结构与所述天线端口配置信息所指示的天线端 口结构相对应。 在一可选实施方式中, 发送模块 61 还用于通过高层信令或动态信令向 UE发送所述参考信号资源配置信息。 其中, 高层信令可以是 RRC信令或者 MAC层信令,但不限于此。动态信令可以是通过 PDCCH或者 ePDCCH发送 的 DCI, 但不限于此。
在一可选实施方式中, 所述天线端口配置信息包括索引 m和索引 n; 其 中, 索引 m对应天线端口结构中的行数, 也就是天线端口结构对应的天线阵 列结构中的行数; 索引 n对应天线端口结构中的列数, 也就是天线端口结构 对应的天线阵列结构中的列数。而索引 m和索引 n的乘积为天线端口个数N 基于上述, 本实施例中的预编码矩阵的一种结构可以是 W = WiW2。 其中, W为预编码矩阵; w^PW2都是矩阵, 在本发明实施例中, 对矩阵 ^和 2的 具体含义不做限定。
X 0
Wi =
可选的, 0 X , X = A®B; ®表示克罗内克尔积, A和 B分别是 一个 mxp和 (n/2)xq的矩阵。具体地,以 16个天线为例,阵列结构表示为 m=2, n=8, 则 A和 B分别是一个 Ρ和一个 4xq的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 4xP和一个 2xq的矩阵。 其中, p和 q是正整数。 相应的, W2是一个 q)x 的矩阵, r为所述预编码矩阵 W的 秩。
X 0
W, =
或者, 0 X , X = A®B; ®表示克罗内克尔积, A和 B分别是一 个 (m/2)xp和 nxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=4, n=8, 则 A和 B分别是一个 Ρ和一个 9的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 2xP和一个 4xq的矩阵。 其中, p和 q是正整数。 相应的, W2是一个 的矩阵, r为所述预编码矩阵 W的 秩。 在一可选实施方式中, ^®Β; ②表示克罗内克尔积, Α和 Β分别是 一个 mxP和 nxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=2, n=8, 则 A和 B分别是一个 2 χ Ρ和一个 8 χ9的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 4 x P和一个 4xq的矩阵。 其中, p和 q是整数。相应的, W2是一个 (pq)x 的矩阵, r为所述预编码矩阵 W的秩。
或者, ^ = Α ®Β ; Ο表示克罗内克尔积, 或者 Α和 Β分别是一个 η χ Ρ和 mxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=2, n=8, 则 A 和 B分别是一个 8 χ Ρ和一个 2xq的矩阵。 以 16个天线为例, 阵列结构表示为 m=4, n=4, 则 A和 B分别是一个 4 x P和一个 2xq的矩阵。 其中, p和 q是整 数。 相应的, w2是一个 (pq)x 的矩阵, r为所述预编码矩阵 W的秩。
基于上述实施方式, 接收模块 62接收的 PMI可以包括第一 PMI和第二 PMI。 第一 PMI用于指示矩阵 Wi ; 第二 PMI用于指示矩阵 W2。 基于此, 接 收模块 62具体可用于分别接收 UE上报第一 PMI和第二 PMI。在该实施方式 中, 可以考虑矩阵 Wi和矩阵 W2所标识含义的不同, 所述基站接收 UE独立上 报的 PMI, 允许上报第一 PMI和第二 PMI的次数以及频率间隔等有所不同, 有利于降低 CSI上报或反馈的开销, 从而提高系统的吞吐量。
本实施例提供的基站, 向 UE发送参考信号之后,接收 UE上报的用于指 示结构与天线端口配置信息所指示的天线端口结构相对应的预编码矩阵的 PMI, 使得 CSI测量以及上报过程同时考虑了 AAS基站天线水平向和垂直向 的自由度, 从而能够提高 CSI上报或反馈的精度, 降低了 CSI上报或反馈的 开销, 提高了数据传输的容量或者吞吐量, 从而提高了系统的容量和覆盖。 适用于存在 AAS基站天线部署的场景, 解决了 ASS基站场景下 CSI的上报 问题。
图 7为本发明实施例提供的另一种基站的结构示意图。 如图 7所示, 所 述基站包括: 发射器 71和接收器 72。
发射器 71 , 用于向 UE发送参考信号, 其中, 所述 UE基于预先获取的 参考信号资源配置信息接收所述参考信号, 所述参考信号资源配置信息包括 天线端口配置信息, 所述天线端口配置信息用于指示天线端口结构。
接收器 72, 用于接收所述 UE上报的 PMI, 所述 PMI用于指示所述 UE 选择的预编码矩阵, 所述预编码矩阵是所述 UE基于所述参考信号从码本中 选择的, 所述预编码矩阵的结构与所述天线端口配置信息所指示的天线端口 结构相对应。 在一可选实施方式中, 发射器 71还用于通过高层信令或动态信令向 UE 发送所述参考信号资源配置信息。其中,高层信令可以是 RRC信令或者 MAC 层信令,但不限于此。动态信令可以是通过 PDCCH或者 ePDCCH发送的 DCI , 但不限于此。
在一可选实施方式中, 所述天线端口配置信息包括索引 m和索引 n; 其 中, 索引 m对应天线端口结构中的行数, 也就是天线端口结构对应的天线阵 列结构中的行数; 索引 n对应天线端口结构中的列数, 也就是天线端口结构 对应的天线阵列结构中的列数。而索引 m和索引 n的乘积为天线端口个数N 基于上述, 本实施例中的预编码矩阵的一种结构可以是 W = WiW2。 其中, W为预编码矩阵; w^PW2都是矩阵, 在本发明实施例中, 对矩阵 ^和 2的 具体含义不做限定。
X 0
Wi =
可选的, 0 X , X = A®B; ®表示克罗内克尔积, Α和 Β分别是 一个 mxp和 (n/2)xq的矩阵。具体地,以 16个天线为例,阵列结构表示为 m=2, n=8, 则 A和 B分别是一个 Ρ和一个 4xq的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 4xP和一个 2xq的矩阵。 其中, p和 q是正整数。 相应的, W2是一个 q)x 的矩阵, r为所述预编码矩阵 W的 秩。
X 0
W, =
或者, 0 X , X = A®B; ®表示克罗内克尔积, A和 B分别是一 个 (m/2)xp和 nxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=4, n=8, 则 A和 B分别是一个 Ρ和一个 9的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 2xP和一个 4xq的矩阵。 其中, p和 q是正整数。 相应的, W2是一个 的矩阵, r为所述预编码矩阵 W的 秩。 在一可选实施方式中, ^®Β; ②表示克罗内克尔积, Α和 Β分别是 一个 mxP和 nxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=2, n=8, 则 A和 B分别是一个 2 χ Ρ和一个 8 χ 9的矩阵。 以 16个天线为例, 阵列 结构表示为 m=4, n=4, 则 A和 B分别是一个 4 x P和一个 4xq的矩阵。 其中, p和 q是整数。相应的, W2是一个 (pq)x 的矩阵, r为所述预编码矩阵 W的秩。
或者, ^ = Α ®Β ; Ο表示克罗内克尔积, 或者 Α和 Β分别是一个 ηχΡ和 mxq的矩阵。 具体地, 以 16个天线为例, 阵列结构表示为 m=2, n=8, 则 A 和 B分别是一个 8 χΡ和一个 2xq的矩阵。 以 16个天线为例, 阵列结构表示为 m=4, n=4, 则 A和 B分别是一个 4 x P和一个 2xq的矩阵。 其中, p和 q是整 数。 相应的, w2是一个 (pq)x 的矩阵, r为所述预编码矩阵 W的秩。
基于上述实施方式,接收器 72接收的 PMI可以包括第 ― PMI和第二 PMI。 第一 PMI用于指示矩阵 Wi ; 第二 PMI用于指示矩阵 W2。 基于此, 接收模块 62具体可用于分别接收 UE上报第一 PMI和第二 PMI。 在该实施方式中, 可 以考虑矩阵 Wi和矩阵 W2所标识含义的不同, 所述基站接收 UE独立上报的 PMI, 允许上报第一 PMI和第二 PMI的次数以及频率间隔等有所不同, 有利 于降低 CSI上报或反馈的开销, 从而提高系统的吞吐量。
进一步, 如图 7所示, 所述基站还包括: 存储器 73和处理器 74。
存储器 73 , 用于存储程序。 具体的, 程序可以包括程序代码, 所述程序 代码包括计算机操作指令。 存储器 73可以包含高速 RAM存储器, 也可以包 括非易失性存储器( non-volatile memory ) , 例如至少一个磁盘存储器。
处理器 74, 用于执行存储器 73存储的程序, 以用于实现所述基站的控 制逻辑等。 处理器 74可以是一个 CPU, 或者是特定 ASIC, 或者是被配置成 实施本发明实施例的一个或多个集成电路。
可选的, 在具体实现上, 如果发射器 71、 接收器 72、 存储器 73和处理 器 74独立实现, 则发射器 71、 接收器 72、 存储器 73和处理器 74可以通过 总线相互连接并完成相互间的通信。 所述总线可以是工业标准体系结构 ( Industry Standard Architecture ,简称为 ISA )总线、夕卜部设备互连 ( Peripheral Component, 简称为 PCI ) 总线或扩展工业标准体系结构 (Extended Industry Standard Architecture, 简称为 EISA ) 总线等。 所述总线可以分为地址总线、 数据总线、 控制总线等。 为便于表示, 图 7中仅用一条粗线表示, 但并不表 示仅有一根总线或一种类型的总线。 可选的, 在具体实现上, 如果发射器 71、 接收器 72、 存储器 73和处理 器 74集成在一块芯片上实现, 则发射器 71、 接收器 72、 存储器 73和处理器 74可以通过内部接口完成相同间的通信。
本实施例提供的基站, 向 UE发送参考信号之后,接收 UE上报的用于指 示结构与天线端口配置信息所指示的天线端口结构相对应的预编码矩阵的 PMI, 使得 CSI测量以及上报过程同时考虑了 AAS基站天线水平向和垂直向 的自由度, 从而能够提高 CSI上报或反馈的精度, 降低了 CSI上报或反馈的 开销, 提高了数据传输的容量或者吞吐量, 从而提高了系统的容量和覆盖。 适用于存在 AAS基站天线部署的场景, 解决了 ASS基站场景下 CSI的上报 问题。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步骤 可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读 取存储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述 的存储介质包括: ROM, RAM, 磁碟或者光盘等各种可以存储程序代码的介 质。
最后应说明的是: 以上各实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述各实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分或者全部技术特征进行等同替换; 而这些修改或者替换, 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要求 书
1、 一种信道状态信息上报方法, 其特征在于, 包括:
获取参考信号资源配置信息, 所述参考信号资源配置信息包括天线端口 配置信息, 所述天线端口配置信息用于指示天线端口结构;
根据所述参考信号资源配置信息, 接收基站发送的参考信号;
基于所接收的参考信号, 从码本中选择一个预编码矩阵, 所述预编码矩 阵的结构与所述天线端口配置信息所指示的天线端口结构相对应;
向所述基站上报预编码矩阵指示 PMI, 所述 PMI用于指示所选择的预编 码矩阵。
2、 根据权利要求 1所述的方法, 其特征在于, 所述天线端口配置信息包 括索引 m和索引 n; 其中, 索引 m对应所述天线端口结构中的行数, 索引 n 对应所述天线端口结构中的列数。
3、 根据权利要求 2所述的方法, 其特征在于, 所述预编码矩阵的结构为
W = W!W2
X 0
0 X
Figure imgf000027_0001
X = A®B ; ®表示克罗内克尔积, A和 B分别是一个 mxp和 (n/2)x q的矩阵,或者 A和 B分别是一个 (m / 2)xP和 η χ¾的矩阵; W2是 一个 (pq)x 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
4、 根据权利要求 2所述的方法, 其特征在于, 所述预编码矩阵的结构为 W = W!W2 其中 Wi = A 0 B ; ®表示克罗内克尔积, A和 B分别是一个 m xP和 η χ¾的 矩阵, 或者 A和 B分别是一个 η χρ和 m xq的矩阵, W2是一个 (pq)x 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
5、 根据权利要求 3或 4所述的方法, 其特征在于, 所述 PMI包括用于 指示矩阵^的第一 pMI和用于指示矩阵 W2的第二 PMI
所述向所述基站上报预编码矩阵指示 PMI包括:
分别向所述基站上报所述第一 PMI和所述第二 PMI。
6、 一种信道状态信息接收方法, 其特征在于, 包括:
向用户设备发送参考信号, 其中, 所述用户设备基于预先获取的参考信 号资源配置信息接收所述参考信号, 所述参考信号资源配置信息包括天线端 口配置信息, 所述天线端口配置信息用于指示天线端口结构;
接收所述用户设备上报的预编码矩阵指示 PMI, 所述 PMI用于指示所述 用户设备选择的预编码矩阵, 所述预编码矩阵是所述用户设备基于所述参考 信号从码本中选择的, 所述预编码矩阵的结构与所述天线端口配置信息所指 示的天线端口结构相对应。
7、 根据权利要求 6所述的方法, 其特征在于, 所述天线端口配置信息包 括索引 m和索引 n; 其中, 索引 m对应所述天线端口结构中的行数, 索引 n 对应所述天线端口结构中的列数。
8、 根据权利要求 7所述的方法, 其特征在于, 所述预编码矩阵的结构为 W = WW
X 0
=
0 X
Figure imgf000028_0001
X = A®B ; ®表示克罗内克尔积, A和 B分别是一个 mxp和 (n/2;»X q的矩阵,或者 A和 B分别是一个 (M / 2)XP和 η χ¾的矩阵; W2是 一个 (Pq)x 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
9、 根据权利要求 7所述的方法, 其特征在于, 所述预编码矩阵的结构为 W = W!W2 其中 Wi = A 0 B ; ®表示克罗内克尔积, A和 B分别是一个 m xP和 η χ¾的 矩阵, 或者 A和 B分别是一个 η χΡ和 m xq的矩阵, W2是一个 (pq)x 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
10、 根据权利要求 8或 9所述的方法, 其特征在于, 所述 PMI包括用于 指示矩阵1^的第一 pMI和用于指示矩阵 W2的第二 PMI
所述接收所述用户设备上报的预编码矩阵指示 PMI包括:
分别接收所述用户设备上报的所述第一 PMI和所述第二 PMI。
11、 一种用户设备, 其特征在于, 包括:
获取模块, 用于获取参考信号资源配置信息, 所述参考信号资源配置信 息包括天线端口配置信息, 所述天线端口配置信息用于指示天线端口结构; 接收模块, 用于根据所述获取模块获取的所述参考信号资源配置信息, 接收基站发送的参考信号; 选择模块, 用于基于所述接收模块接收的所述参考信号, 从码本中选择 一个预编码矩阵, 所述预编码矩阵的结构与所述天线端口配置信息所指示的 天线端口结构相对应;
发送模块, 用于向所述基站上报预编码矩阵指示 PMI, 所述 PMI用于指 示所述选择模块选择的预编码矩阵。
12、 根据权利要求 11所述的用户设备, 其特征在于, 所述天线端口配置 信息包括索引 m和索引 n; 其中, 索引 m对应所述天线端口结构中的行数, 索引 n对应所述天线端口结构中的列数。
13、 根据权利要求 12所述的用户设备, 其特征在于, 所述预编码矩阵的 结构为 W W^ ,
X 0
0 X X = A®B ; ®表示克罗内克尔积, A和 B分别是一个 mxp和 (n/2)x q的矩阵,或者 A和 B分别是一个 (m / 2)xP和 η χ¾的矩阵; W2是 一个 (pq)x 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
14、 根据权利要求 12所述的用户设备, 其特征在于, 所述预编码矩阵的 结构为 W W^ ,
其中 Wi = A 0 B ; ®表示克罗内克尔积, A和 B分别是一个 m xP和 n x q的 矩阵, 或者 A和 B分别是一个 ^ 和111^的矩阵, W2是一个 (pq)x 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
15、 根据权利要求 13或 14所述的用户设备, 其特征在于, 所述 PMI包 括用于指示矩阵 Wi的第一 PMI和用于指示矩阵 W2的第二 PMI;
所述发送模块具体用于分别向所述基站上报所述第一 PMI 和所述第二
PMI。
16、 一种基站, 其特征在于, 包括:
发送模块, 用于向用户设备发送参考信号, 其中, 所述用户设备基于预 先获取的参考信号资源配置信息接收所述参考信号, 所述参考信号资源配置 信息包括天线端口配置信息,所述天线端口配置信息用于指示天线端口结构; 接收模块,用于接收所述用户设备上报的预编码矩阵指示 PMI,所述 PMI 用于指示所述用户设备选择的预编码矩阵, 所述预编码矩阵是所述用户设备 基于所述参考信号从码本中选择的, 所述预编码矩阵的结构与所述天线端口 配置信息所指示的天线端口结构相对应。
17、 根据权利要求 16所述的基站, 其特征在于, 所述天线端口配置信息 包括索引 m和索引 n; 其中, 索引 m对应所述天线端口结构中的行数, 索引 n对应所述天线端口结构中的列数。
18、 根据权利要求 17所述的基站, 其特征在于, 所述预编码矩阵的结构 为 W = \ \¥2
Figure imgf000030_0001
, X = A®B ; ®表示克罗内克尔积, A和 B分别是一个 mxp和 (n/2)x q的矩阵,或者 A和 B分别是一个 (m / 2)xP和 η χ¾的矩阵; W2是 一个^ 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
19、 根据权利要求 17所述的基站, 其特征在于, 所述预编码矩阵的结构 为 W = \ \¥2, 其中 Wi = A 0 B ; ®表示克罗内克尔积, A和 B分别是一个 m xP和 n x q的 矩阵, 或者 A和 B分别是一个 ^ 和111^的矩阵, W2是一个 (pq)x 的矩阵, p和 q是正整数, r为所述预编码矩阵的秩。
20、 根据权利要求 18或 19所述的基站, 其特征在于, 所述 PMI包括用 于指示矩阵 W的第一 pMI和用于指示矩阵 W2的第二 pMI; 所述接收模块具体用于分别接收所述用户设备上报的所述第一 PMI和所 述第二 PMI。
21、 一种用户设备, 其特征在于, 包括: 处理器、 接收器和发射器; 所述处理器, 用于获取参考信号资源配置信息, 所述参考信号资源配置 信息包括天线端口配置信息,所述天线端口配置信息用于指示天线端口结构, 并用于基于所述接收器接收的参考信号, 从码本中选择一个预编码矩阵, 所 述预编码矩阵的结构与所述天线端口配置信息所指示的天线端口结构相对 应;
所述接收器, 用于根据所述处理器获取的所述参考信号资源配置信息, 接收基站发送的所述参考信号;
所述发射器, 用于向所述基站上报预编码矩阵指示 PMI, 所述 PMI用于 指示所述处理器选择的预编码矩阵。
22、 一种基站, 其特征在于, 包括:
发射器, 用于向用户设备发送参考信号, 其中, 所述用户设备基于预先 获取的参考信号资源配置信息接收所述参考信号, 所述参考信号资源配置信 息包括天线端口配置信息, 所述天线端口配置信息用于指示天线端口结构; 接收器, 用于接收所述用户设备上报的预编码矩阵指示 PMI, 所述 PMI 用于指示所述用户设备选择的预编码矩阵, 所述预编码矩阵是所述用户设备 基于所述参考信号从码本中选择的, 所述预编码矩阵的结构与所述天线端口 配置信息所指示的天线端口结构相对应。
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