WO2019042258A1 - 一种csi-rs测量反馈方法及设备 - Google Patents
一种csi-rs测量反馈方法及设备 Download PDFInfo
- Publication number
- WO2019042258A1 WO2019042258A1 PCT/CN2018/102539 CN2018102539W WO2019042258A1 WO 2019042258 A1 WO2019042258 A1 WO 2019042258A1 CN 2018102539 W CN2018102539 W CN 2018102539W WO 2019042258 A1 WO2019042258 A1 WO 2019042258A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- matrix
- csi
- rss
- antenna port
- channel
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0417—Feedback systems
-
- 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
- H04B7/063—Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- 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
- H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
- H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas
-
- 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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
Definitions
- the present application relates to the field of wireless communications technologies, and in particular, to a CSI-RS measurement feedback method and device.
- the digital-analog hybrid architecture is a compromise between the traditional digital MIMO architecture and the pure analog architecture. On the one hand, it can reduce the power loss and reduce the hardware cost. Can provide a relatively large degree of freedom, achieve array gain and diversity gain to ensure system performance.
- the digital-analog hybrid architecture since the digital channel is smaller than the number of antennas, the transmitted pilot is weighted by analog precoding, and the weight of the analog precoding is generally unchanged, so the performance of the digital-analog hybrid architecture may be have influence on.
- the application provides a CSI-RS measurement feedback method and device for optimizing analog precoding and digital precoding.
- the present application provides a CSI-RS measurement feedback method, where the method includes: receiving, by a terminal device, S channel state information reference signals CSI-RS sent by a network device, where the terminal device associates M CSI-RSs
- the antenna port number is sent to the network device, and the quantization result of the precoding matrix indicating the PMI or the channel matrix H corresponding to the channel matrix H is sent to the network device, where each CSI-RS corresponds to one antenna port number, and S is a positive integer.
- the terminal device can select the M antenna port numbers corresponding to the M CSI-RSs from the S antenna port numbers corresponding to the S CSI-RSs to feed back to the base station, and can assist the network device to determine the corresponding M antenna port numbers.
- the weights of the M analog precodings enable the analog beams determined according to the weights of the M analog precodings to better point to the terminal equipment, thereby improving the performance of hybrid beamforming (HBF) and improving the spectrum utilization efficiency. , improve throughput.
- the terminal device sends the quantization result of the PMI or the channel matrix H corresponding to the channel matrix H to the network device, and can assist the network device to determine the precoding matrix while optimizing the digital precoding. The result is improved spectrum utilization efficiency and improved throughput.
- the M may be configured by the network device or determined by the terminal device.
- the M CSI-RSs are M CSI-RSs whose signal reception strengths are selected from high to low according to the signal reception strengths corresponding to the S CSI-RSs respectively.
- the M CSI-RSs are CSI-RSs with better signal reception strength, so as to assist the network device to select the weight of the analog precoding.
- the terminal device sends the M antenna port numbers corresponding to the M CSI-RSs to the network device, which may be, but not limited to, the following two methods:
- Method 1 The terminal device transmits M antenna port numbers on the physical uplink shared channel PUSCH or PUCCH.
- the M antenna port numbers can also be fed back to the network device in the form of a bit map.
- Method 2 The terminal device sends a PMI of a first matrix corresponding to the M antenna port numbers in the first codebook, where the first codebook includes a plurality of predefined first matrices, and each first matrix corresponds to one PMI, and each of the first matrices corresponds to one PMI.
- the first matrix is an S ⁇ 1 matrix, and the S elements in each first matrix are in one-to-one correspondence with the S antenna port numbers corresponding to the S CSI-RSs, and are in the first matrix corresponding to the M antenna port numbers.
- the values of the elements corresponding to the antenna port numbers are all 1, and the values of the remaining SM elements are all 0.
- the present application provides a variety of possible implementations for feeding back M antenna port numbers.
- the above method 2 to feed back M antenna port numbers, only the PMI of the first matrix corresponding to the M antenna port numbers needs to be fed back, which can save uplink overhead.
- the quantization result of the channel matrix H includes the quantized value of the modulus corresponding to the M elements included in the quantization matrix H' corresponding to the channel matrix H and the quantized value of the phase.
- the quantization result of the channel matrix H is determined by the principle of throughput maximization or the principle of signal to interference plus noise ratio (SINR) maximization.
- the quantization result of the channel matrix H includes the M group values, and the value of the i-th group includes the value of the i-th k 1 and the value of the i-th k 2 , respectively corresponding to
- a denotes the minimum value of quantization
- b denotes the maximum value of quantization
- B amp denotes the number of quantization bits of
- B ⁇ denotes the number of quantization bits of ⁇ i1
- i is a positive integer less than or equal to M
- M sets The values all meet the principle of throughput maximization or the principle of maximizing the signal to interference and noise ratio.
- the quantization result of the channel matrix H includes the quantized value
- the diagonal array D is:
- the kth Givens rotation matrix is:
- i is a positive integer less than or equal to M
- the feedback amount that is, the uplink overhead can be significantly reduced, and the total feedback amount relative to the direct feedback method can be reduced by nearly 50%.
- the terminal device may define a codebook, and the codebook includes a plurality of predefined precoding matrices, and each precoding matrix has a corresponding PMI.
- the precoding matrix closest to the channel matrix H is selected by matching each precoding matrix with the channel matrix H, and the corresponding PMI is fed back.
- the terminal device transmits the M antenna port numbers corresponding to the M CSI-RSs to the network device, and sends the quantization result of the precoding matrix indicating the PMI or the channel matrix H corresponding to the channel matrix H to the After the network device, the terminal device receives the network device to send data to the terminal device through the antenna ports corresponding to the M antenna port numbers, and the data is data encoded according to the precoding matrix.
- the network device selects the weight of the analog precoding according to the M antenna port numbers, and determines the precoding matrix according to the PMI of the channel matrix H or the quantization result of the channel matrix H, and then the data that needs to be sent to the terminal device
- the precoding matrix is encoded and sent to the terminal device.
- the present application provides a CSI-RS measurement feedback method, where the method includes: the network device sends S CSI-RSs, and the network device receives M antenna port numbers corresponding to M CSI-RSs sent by the terminal device, and The quantization result of the PMI or the channel matrix H corresponding to the channel matrix H, wherein each CSI-RS corresponds to one antenna port number, S is a positive integer, the channel matrix H corresponds to M CSI-RSs, and the channel matrix H includes M elements , S ⁇ M, M is a positive integer.
- the M CSI-RSs are M CSI-RSs whose signal receiving strengths are selected from high to low according to the signal receiving strengths corresponding to the S CSI-RSs respectively.
- the network device receives the M antenna port numbers corresponding to the M CSI-RSs sent by the terminal device by the following two methods:
- Method 1 The network device receives M antenna port numbers corresponding to M CSI-RSs sent by the terminal device on the PUSCH or the PUCCH;
- Method 2 The network device receives a PMI of a first matrix corresponding to the M antenna port numbers in the first codebook sent by the terminal device, where the first codebook includes a plurality of predefined first matrices, and each of the first matrices corresponds to one In the PMI, each of the first matrices is an S ⁇ 1 matrix, and the S elements in each first matrix correspond to the S antenna port numbers corresponding to the S CSI-RSs, and correspond to the M antenna port numbers.
- the values of the elements corresponding to the M antenna port numbers in a matrix are all 1, and the values of the remaining SM elements are all 0.
- the quantization result of the channel matrix H includes the quantized value of the modulus corresponding to the M elements included in the quantization matrix H' corresponding to the channel matrix H and the quantized value of the phase.
- the quantization result of the channel matrix H includes the M group values, and the value of the i-th group includes the value of the i-th k 1 and the value of the i-th k 2 , respectively corresponding to
- a denotes the minimum value of quantization
- b denotes the maximum value of quantization
- B amp denotes the number of quantization bits of
- B ⁇ denotes the number of quantization bits of ⁇ i1
- i is a positive integer less than or equal to M
- M sets The values all meet the principle of throughput maximization or the principle of maximizing the signal to interference and noise ratio.
- the quantization result of the channel matrix H includes the quantized value
- the diagonal array D is:
- the kth Givens rotation matrix is:
- i is a positive integer less than or equal to M
- the network device After the network device receives the M antenna port numbers corresponding to the M CSI-RSs sent by the terminal device, and the quantization result of the PMI or the channel matrix H corresponding to the channel matrix H, the network device passes the M antennas.
- the antenna port corresponding to the port number transmits data to the terminal device, and the data is data encoded according to the precoding matrix.
- the application provides a terminal device, including: a memory, a processor, and a transceiver, where the memory stores instructions, when the instruction is executed by the processor, so that the transceiver is configured to receive S channels sent by the network device.
- the M may be configured by the network device or determined by the terminal device.
- the M CSI-RSs are M CSI-RSs whose signal receiving strengths are selected from high to low according to the signal receiving strengths corresponding to the S CSI-RSs respectively.
- the transceiver is specifically configured to: send M antenna port numbers on a physical uplink shared channel PUSCH or PUCCH; or send a first matrix corresponding to M antenna port numbers in the first codebook.
- the first codebook includes a plurality of predefined first matrices, each first matrix corresponds to one PMI, and each first matrix is an S ⁇ 1 matrix, and S elements and S in each first matrix
- the S antenna port numbers corresponding to the CSI-RSs are in one-to-one correspondence.
- the corresponding elements of the M antenna port numbers are all 1, and the values of the remaining SM elements are Both are 0.
- the quantization result of the channel matrix H includes the quantized value of the modulus corresponding to the M elements included in the quantization matrix H' corresponding to the channel matrix H and the quantized value of the phase.
- the quantization result of the channel matrix H includes the M group values, and the value of the i-th group includes the value of the i-th k 1 and the value of the i-th k 2 , respectively corresponding to
- a denotes the minimum value of quantization
- b denotes the maximum value of quantization
- B amp denotes the number of quantization bits of
- B ⁇ denotes the number of quantization bits of ⁇ i1
- i is a positive integer less than or equal to M
- M sets The values all meet the principle of throughput maximization or the principle of maximizing the signal to interference and noise ratio.
- the quantization result of the channel matrix H includes the quantized value
- the diagonal array D is:
- the kth Givens rotation matrix is:
- i is a positive integer less than or equal to M
- the transceiver is further configured to: send the M antenna port numbers corresponding to the M CSI-RSs to the network device, and indicate the PMI or the channel matrix H of the precoding matrix corresponding to the channel matrix H. After the quantized result is sent to the network device, the receiving network device sends data to the terminal device through the antenna ports corresponding to the M antenna port numbers, and the data is data encoded according to the precoding matrix.
- the application provides a network device, including: a memory, a processor, a transceiver, and a memory storing instructions, when the instruction is executed by the processor, so that the transceiver is configured to send S CSI-RSs, where Each CSI-RS corresponds to one antenna port number, and S is a positive integer.
- the transceiver is further configured to receive M antenna port numbers corresponding to M CSI-RSs sent by the terminal device, and PMIs or channels corresponding to the channel matrix H.
- the quantization result of the matrix H wherein the channel matrix H corresponds to M CSI-RSs, the channel matrix H includes M elements, S ⁇ M, and M is a positive integer.
- the M CSI-RSs are M CSI-RSs whose signal receiving strengths are selected from high to low according to the signal receiving strengths corresponding to the S CSI-RSs respectively.
- the transceiver is specifically configured to receive the M antenna port numbers corresponding to the M CSI-RSs sent by the terminal device on the PUSCH or the PUCCH, or the corresponding M in the first codebook sent by the receiving terminal device.
- PMI of the first matrix of the antenna port number the first codebook includes a plurality of predefined first matrices, each first matrix corresponds to one PMI, and each first matrix is an S ⁇ 1 matrix, each of the first The S elements in a matrix correspond one-to-one with the S antenna port numbers corresponding to the S CSI-RSs, and the elements corresponding to the M antenna port numbers in the first matrix corresponding to the M antenna port numbers are all 1.
- the value of the remaining SM elements is 0.
- the quantization result of the channel matrix H includes the quantized value of the modulus corresponding to the M elements included in the quantization matrix H' corresponding to the channel matrix H and the quantized value of the phase.
- the quantization result of the channel matrix H includes the M group values, and the value of the i-th group includes the value of the i-th k 1 and the value of the i-th k 2 , respectively corresponding to
- a denotes the minimum value of quantization
- b denotes the maximum value of quantization
- B amp denotes the number of quantization bits of
- B ⁇ denotes the number of quantization bits of ⁇ i1
- i is a positive integer less than or equal to M
- M sets The values all meet the principle of throughput maximization or the principle of maximizing the signal to interference and noise ratio.
- the quantization result of the channel matrix H includes the quantized value
- the diagonal array D is:
- the kth Givens rotation matrix is:
- i is a positive integer less than or equal to M
- the transceiver is configured to: after the network device receives the M antenna port numbers corresponding to the M CSI-RSs sent by the terminal device, and the quantization result of the PMI or the channel matrix H corresponding to the channel matrix H, The data is transmitted to the terminal device through the antenna ports corresponding to the M antenna port numbers, and the data is data encoded according to the precoding matrix.
- the present application provides a CSI-RS measurement feedback apparatus, where the apparatus includes a receiving unit and a sending unit, where the receiving unit is configured to perform the receiving step performed by the terminal device in the above first aspect, and the sending unit is configured to perform The transmitting step performed by the terminal device on the one hand.
- the application provides a CSI-RS measurement feedback device, where the device includes a sending unit and a receiving unit, where the receiving unit is configured to perform the receiving step performed by the network device in the second aspect, and the sending unit is configured to perform The sending step performed by the network device in the second aspect.
- the embodiment of the present application further provides a communication system, where the communication system includes the network device of the second aspect and the terminal device of the first aspect.
- the embodiment of the present application further provides a first computer storage medium, where computer executable instructions are stored, where the computer executable instructions are used to perform the method of the foregoing first aspect of the present application, or The method of the second aspect.
- the embodiment of the present application further provides a first computer program product, the computer program product comprising a computer program stored on the first type of computer storage medium, the computer program comprising program instructions, when the program When the instructions are executed by a computer, causing the computer to perform the method of the first aspect of the present application; or the computer program product comprises a computer program stored on the second type of computer storage medium, the computer program comprising program instructions When the program instructions are executed by a computer, the computer is caused to perform the method of the second aspect of the present application.
- the present application further provides a chip, the chip comprising a processor and a memory, the processor for reading code stored in the memory to implement the method in the first aspect and each possible design, Or implement the method of the second aspect and each possible design.
- FIG. 1 is a flowchart of an overview of a CSI-RS measurement feedback method in the present application
- FIG. 2 is a schematic structural diagram of a CSI-RS measurement feedback device in the present application.
- FIG. 3 is a second schematic structural diagram of a CSI-RS measurement feedback device in the present application.
- FIG. 4 is a schematic structural diagram of a terminal device in the present application.
- FIG. 5 is a schematic structural diagram of a network device in the present application.
- the techniques described in this application may employ wireless communication systems of various radio access technologies, such as code division multiple access (CDMA), frequency division multiple access (FDMA), time division multiple access ( Time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), single carrier frequency division multiple access (SC-FDMA) access technology systems, It is also applicable to subsequent evolution systems, such as the fifth generation 5G (also known as the new radio (NR)) system.
- code division multiple access CDMA
- FDMA frequency division multiple access
- TDMA Time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- 5G also known as the new radio (NR)
- the network element involved in the embodiment of the present application includes a network device and a terminal.
- the network device is an access device that the terminal accesses to the mobile communication system by using a wireless method, and may be a base station (NodeB), an evolved base station (eNodeB), a base station in a 5G mobile communication system, a base station in a future mobile communication system, or
- NodeB base station
- eNodeB evolved base station
- 5G mobile communication system a base station in a future mobile communication system
- the specific technology and the specific device configuration adopted by the network device are not limited in the embodiment of the present application.
- the terminal equipment may be simply referred to as a terminal, or may be a user equipment (UE), a mobile station (MS), a mobile terminal (MT), or the like.
- the terminal device can be a mobile phone, a tablet, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, industrial control (industrial control) Wireless terminal, wireless terminal in self driving, wireless terminal in remote medical surgery, wireless terminal in smart grid, wireless in transport safety A terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.
- the network device uses multiple beam transmit channel state information reference signals (CSI-RS), and the terminal device performs channel estimation according to CSI-RS.
- the channel estimation result quantizes and feeds back channel information.
- the network device pre-codes the data according to the channel information and transmits the data to the terminal device, thereby enabling the terminal device to receive the data.
- the weight of the analog precoding is generally the same, so it may affect the performance of the digital-analog hybrid architecture.
- the present application provides a CSI-RS measurement feedback method on the basis of the above, to optimize the above process.
- the method includes:
- Step 100 The network device sends S CSI-RSs to the terminal device, where each CSI-RS corresponds to one antenna port number, and S is a positive integer.
- Step 110 The terminal device sends the M antenna port numbers corresponding to the M CSI-RSs to the network device according to the S CSI-RSs sent by the network device, and indicates a precoding matrix indicator corresponding to the channel matrix H.
- the quantized result of the PMI) or the channel matrix H is sent to the network device.
- any of the columns of the channel matrix H includes M elements, ie, corresponding to M transmit antenna ports.
- the M may be configured by the network device or determined by the terminal device.
- the M CSI-RSs are M CSI-RSs whose signal receiving strengths are selected from high to low according to the signal receiving strengths corresponding to the S CSI-RSs respectively.
- the M CSI-RSs are CSI-RSs with better signal receiving strength, so that the auxiliary network device selects the weights of the analog precoding, so that the M analog beams corresponding to the M antenna port numbers can better point to the terminal. device.
- the signal reception strength may refer to reference signal receiving power (RSRP), which is one of the key parameters representing the strength of the wireless signal and one of the physical layer measurement requirements, and is all resources that carry the reference signal within a certain symbol.
- RSRP reference signal receiving power
- the terminal device sends the M antenna port numbers corresponding to the M CSI-RSs to the network device, which may be, but not limited to, the following methods:
- Method 1 The terminal device directly transmits M antenna port numbers on a physical uplink shared channel (PUSCH) or a physical uplink control channe (PUCCH).
- PUSCH physical uplink shared channel
- PUCCH physical uplink control channe
- the serial number of the S antenna ports is 1, 2, ..., S
- the terminal device may feed back M antenna port numbers to the network device on the PUSCH or PUCCH; or may feed back the number M of the antenna port number and the corresponding each.
- the antenna port number is given to the network device.
- the M antenna port numbers can also be fed back to the network device in the form of a bit map.
- Method 2 The terminal device sends a PMI of a first matrix corresponding to the M antenna port numbers in the first codebook, where the first codebook includes a plurality of predefined first matrices, and each first matrix corresponds to one PMI, and each of the first matrices corresponds to one PMI.
- the first matrix is an S ⁇ 1 matrix, and the S elements in each first matrix are in one-to-one correspondence with the S antenna port numbers corresponding to the S CSI-RSs, and are in the first matrix corresponding to the M antenna port numbers.
- the values of the elements corresponding to the antenna port numbers are all 1, and the values of the remaining SM elements are all 0.
- the terminal device selects M CSI-RSs whose signal reception strength is high to low, determines the corresponding first matrix W, and feeds back the corresponding PMI to the network device.
- the terminal determines M CSI-RSs from the S CSI-RSs, the terminal determines a corresponding channel matrix H according to the M CSI-RSs, and further obtains a quantization result of the channel matrix H.
- the quantization result of the channel matrix H in the present application may be in the following two forms.
- the quantization result of the channel matrix H includes the quantized value of the modulus corresponding to the M elements included in the quantization matrix H' corresponding to the channel matrix H and the quantized value of the phase.
- the quantization result of the channel matrix H includes the M group values, and the value of the i-th group includes the value of the i-th k 1 and the value of the i-th k 2 , respectively corresponding to
- a represents the minimum value of the quantization
- b represents the maximum value of the quantization
- B amp represents the number of quantization bits of
- B ⁇ represents the number of quantization bits of ⁇ i1
- i is a positive integer less than or equal to M
- the channel matrix H The quantized result is determined by using the principle of throughput maximization or the principle of maximizing signal to interference plus noise ratio (SINR).
- SINR signal to interference plus noise ratio
- the quantization result of the channel matrix H includes the quantized value
- the diagonal array D is:
- the kth Givens rotation matrix is:
- i is a positive integer less than or equal to M
- ⁇ i,1 is calculated by the channel matrix H, and the calculation method is not limited. For example, let x 1 be equal to the element on the first row and the first column of the matrix D T H , and x 2 is equal to the element on the second row and the first column of D T H
- the Givens transform method can significantly reduce the amount of feedback, that is, the uplink overhead, and the total feedback amount of the first method relative to direct feedback can be reduced by nearly 50%.
- the terminal can obtain the quantization result of the channel matrix H in any of the above two forms and send it to the network device.
- the terminal device may define a codebook, and the codebook includes a plurality of predefined precoding matrices, and each precoding matrix has a corresponding PMI.
- the precoding matrix closest to the channel matrix H is selected by matching each precoding matrix with the channel matrix H, and the corresponding PMI is fed back.
- the terminal quantizes the channel matrix H using a codebook similar to that in LTE release 10, 12, 13, 14 in which the PMI corresponding to the precoding matrix closest to the channel matrix H is selected.
- the terminal device receives the network device to send data to the terminal device through the antenna ports corresponding to the M antenna port numbers, and the data is data encoded according to the precoding matrix.
- the network performs analog precoding on the transmit beams corresponding to the M antenna port numbers, and obtains a precoding matrix according to the PMI corresponding to the channel matrix H or the quantization result of the channel matrix H. Then, the network device sends data to the terminal device through the antenna ports corresponding to the M antenna port numbers, and the data is data encoded according to the precoding matrix.
- the network device transmits S CSI-RSs corresponding to the S antenna ports to the terminal device through the S antenna ports.
- the terminal device measures S CSI-RSs sent by the S antenna ports, and selects antenna port numbers of the M antenna ports corresponding to the M CSI-RSs, that is, M antenna port numbers, and the terminal device feeds back M antennas.
- the channel matrix H is determined based on M CSI-RSs.
- the network device determines the weights of the M analog precodings according to the M antenna port numbers, and determines the analog beam according to the weights of the M analog precodings, so that the analog beam can better point to the terminal device, and further, the network device is configured according to
- the quantization result of the PMI or the channel matrix H corresponding to the channel matrix H is obtained as a precoding matrix, and the data is transmitted to the terminal device through the antenna ports corresponding to the M antenna port numbers, wherein the data transmitted by the network device to the terminal device is according to the precoding matrix. Encoded data. Therefore, the method provided by the present application can improve throughput and improve spectrum utilization efficiency.
- the embodiment of the present application provides a CSI-RS measurement feedback device, and a corresponding terminal device, for implementing the method shown in FIG. 1.
- the CSI-RS measurement feedback device 200 is provided.
- the receiving unit 201 and the transmitting unit 202 are included.
- the receiving unit 201 is configured to receive S CSI-RSs sent by the network device
- the sending unit 202 is configured to: correspond to the M CSI-RSs according to the S CSI-RSs sent by the network device received by the receiving unit 201.
- the M antenna port numbers are transmitted to the network device, and the quantized result of the PMI or channel matrix H corresponding to the channel matrix H is transmitted to the network device.
- FIG. 1 refers the method embodiment shown in FIG. 1 , which is not described herein again.
- the embodiment of the present application provides a CSI-RS measurement feedback device, corresponding to a network device, for implementing the method shown in FIG. 1.
- the CSI-RS measurement feedback device 300 is provided.
- the transmission unit 301 and the receiving unit 302 are included.
- the sending unit 301 is configured to send S CSI-RSs
- the receiving unit 302 is configured to receive M antennas corresponding to the M CSI-RSs sent by the terminal device according to the received CSI-RSs sent by the network device.
- the port number, and the quantization result of the PMI or channel matrix H corresponding to the channel matrix H.
- any of the columns of the channel matrix H includes M elements, ie, corresponding to M transmit antenna ports.
- each unit of the terminal device and the network device is only a division of a logical function, and may be integrated into one physical entity or physically separated in whole or in part.
- these units may all be implemented in the form of software by means of processing component calls; or may be implemented entirely in hardware; some units may be implemented in software in the form of processing component calls, and some units may be implemented in hardware.
- the processing unit may be a separately set processing element, or may be integrated in a certain chip. Alternatively, it may be stored in a memory in the form of a program, and a function of the unit is called and executed by a certain processing element.
- the implementation of other units is similar. In addition, all or part of these units can be integrated or implemented independently.
- the processing elements described herein can be an integrated circuit that has signal processing capabilities.
- each step of the above method or each of the above units may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software.
- the above receiving unit is a unit for controlling reception, and can receive information through a receiving device of a terminal device or a network device, such as an antenna and a radio frequency device.
- the above sending unit is a unit for controlling transmission, and can transmit information through a transmitting device of a terminal device or a network device, such as an antenna and a radio frequency device.
- the above units may be one or more integrated circuits configured to implement the above methods, such as one or more Application Specific Integrated Circuits (ASICs), or one or more digital signal processors ( Digital singnal processor (DSP), or one or more Field Programmable Gate Array (FPGA).
- ASICs Application Specific Integrated Circuits
- DSP Digital singnal processor
- FPGA Field Programmable Gate Array
- the processing element can be a general purpose processor, such as a central processing unit (CPU) or other processor that can invoke the program.
- CPU central processing unit
- these units can be integrated and implemented in the form of a system-on-a-chip (SOC).
- SOC system-on-a-chip
- the embodiment of the present application further provides a terminal device, which is used to implement the method shown in FIG. 1.
- the terminal device 400 includes: a transceiver 401, a processor 402, and a memory. 403, wherein the functions of the receiving unit 201 and the transmitting unit 202 in FIG. 2 described above are implemented by the transceiver 401.
- the memory 403 is configured to store programs, instructions, and the like.
- the program can include program code, the program code including computer operating instructions.
- the memory 403 may include a random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage.
- the processor 402 executes the application program stored in the memory 403, so as to implement the method shown in FIG. 1 .
- FIG. 1 For details, refer to the method embodiment shown in FIG. 1 , which is not described herein again.
- the embodiment of the present application further provides a network device, which is used to implement the method shown in FIG. 1.
- the terminal device 500 includes: a transceiver 501, a processor 502, and a memory. 503, wherein the functions of the transmitting unit 301 and the receiving unit 302 in FIG. 3 can be implemented by the transceiver 501.
- the memory 503 is configured to store programs, instructions, and the like.
- the program can include program code, the program code including computer operating instructions.
- the memory 503 may include a RAM, and may also include a non-volatile memory, such as at least one disk storage.
- the processor 502 executes the application program stored in the memory 503, so as to implement the method shown in FIG. 1 .
- FIG. 1 For details, refer to the method embodiment shown in FIG. 1 , which is not described herein again.
- embodiments of the present application can be provided as a method, system, or computer program product. Therefore, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, embodiments of the present application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
- computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
- Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
- These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
- the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
- the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
- These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
- the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Radio Transmission System (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
一种CSI-RS测量反馈方法及设备,用以优化模拟预编码和数字预编码,该方法包括:终端设备接收网络设备发送的S个CSI-RS,其中,每个CSI-RS对应一个天线端口号。终端设备将M个CSI-RS对应的M个天线端口号发送至网络设备,以及将信道矩阵H对应的PMI或信道矩阵H的量化结果发送至网络设备。因此,终端设备通过从S个CSI-RS对应的S个天线端口号中选择M个CSI-RS对应的M个天线端口号反馈给基站,可以辅助网络设备选择模拟预编码的权值,将信道矩阵H对应的PMI或信道矩阵H的量化结果发送至网络设备,同时实现对数字预编码的优化。
Description
本申请要求在2017年8月28日提交中国专利局、申请号为201710751755.9、发明名称为“一种CSI-RS测量反馈方法及设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
本申请涉及无线通信技术领域,尤其涉及一种CSI-RS测量反馈方法及设备。
为了满足移动数据的快速增长,未来无线通信***需要进一步提高***容量和保证用户的服务质量(quality of service,QoS)要求。许多新的技术和概念,比如大规模多输入多输出(multiple input multiple output,MIMO),密集网络等技术被提出以满足需求。同时,通信界也将目光转向高频段通信,由于毫米波(millimeter wave)段拥有非常大的带宽,毫米波通信已经成为未来5G无线通信***中具有开发潜力的技术之一。
然而,在毫米波通信***中,数模混合预编码成了研究热点,数模混合架构是传统数字MIMO架构和纯模拟架构的折中,它一方面能够减少功率损耗降低硬件成本,另一方面能够提供比较大的自由度,实现阵列增益和分集增益,保证***性能。但是,在数模混合架构中,由于数字通道小于天线数目,发送出去的导频是经过模拟预编码加权过的,而模拟预编码的权值一般不变,因此可能对数模混合架构的性能带来影响。
发明内容
本申请提供一种CSI-RS测量反馈方法及设备,用以优化模拟预编码和数字预编码。
第一方面,本申请提供一种CSI-RS测量反馈方法,该方法包括:终端设备接收网络设备发送的S个信道状态信息参考信号CSI-RS,终端设备将M个CSI-RS对应的M个天线端口号发送至网络设备,以及将信道矩阵H对应的预编码矩阵指示PMI或信道矩阵H的量化结果发送至网络设备,其中,每个CSI-RS对应一个天线端口号,S为正整数,信道矩阵H对应M个CSI-RS,信道矩阵H中的任一行包括M个元素,S>M,或者S=M,M为正整数。
通过上述方法,终端设备通过从S个CSI-RS对应的S个天线端口号中选择M个CSI-RS对应的M个天线端口号反馈给基站,可以辅助网络设备确定M个天线端口号对应的M个模拟预编码的权值,使根据M个模拟预编码的权值确定的模拟波束能更好地指向终端设备,因此能提高混合波束成型(hybrid beamforming,HBF)的性能,改善频谱利用效率,提高吞吐量。进一步地,终端设备将信道矩阵H对应的PMI或信道矩阵H的量化结果发送至网络设备,可以辅助网络设备确定预编码矩阵,同时优化数字预编码。最终实现改善频谱利用效率,提高吞吐量。
可选的,M可以是网络设备配置的,或者终端设备确定的。
在一种可能的设计中,M个CSI-RS是终端设备根据S个CSI-RS分别对应的信号接收 强度筛选出的信号接收强度从高到低的M个CSI-RS。
通过上述方法,M个CSI-RS为信号接收强度较好的CSI-RS,以辅助网络设备选择模拟预编码的权值。
在一种可能的设计中,终端设备将M个CSI-RS对应的M个天线端口号发送至网络设备,可以采用但不限于以下两种方法:
方法1:终端设备在物理上行共享信道PUSCH或PUCCH上发送M个天线端口号。
在一种可能的设计中,M个天线端口号还可以采用比特位图(bitmap)形式反馈至网络设备。
方法2:终端设备发送第一码本中对应M个天线端口号的第一矩阵的PMI,第一码本中包括多个预先定义的第一矩阵,每个第一矩阵对应一个PMI,每个第一矩阵均为S×1矩阵,每个第一矩阵中的S个元素与S个CSI-RS对应的S个天线端口号一一对应,在对应M个天线端口号的第一矩阵中M个天线端口号分别对应的元素的取值均为1,剩余S-M个元素的取值均为0。在一种可能的设计中,第一矩阵的结构可以为W=[0,1,1,…,0],W是一个S×1的矩阵,其中有M个元素为1,其余元素为0。
因此,本申请提供了多种反馈M个天线端口号的可能实现方式。采用上述方法2反馈M个天线端口号,仅需反馈对应M个天线端口号的第一矩阵的PMI,可以节省上行开销。
在一种可能的设计中,信道矩阵H的量化结果包括信道矩阵H对应的量化矩阵H'中包括的M个元素分别对应的模值的量化值和相位的量化值。
信道矩阵H的量化结果是利用吞吐量最大化原则或估计信干噪比(signal to interference plus noise ratio,SINR)最大化原则确定的。
通过上述方法,可以有效节省上行开销。
在一种可能的设计中,信道矩阵H的量化结果包括M组取值,第i组取值包括第i个k
1的取值和第i个k
2的取值,分别对应|h
i1|和φ
i1;
其中,a表示量化的最小值,b表示量化的最大值,B
amp表示|h
i1|的量化比特数,B
φ表示φ
i1的量化比特数,i为小于等于M的正整数,M组取值均满足吞吐量最大化原则或估计信干噪比最大化原则。
通过上述方法,可以有效节省上行开销。
在一种可能的设计中,信道矩阵H的量化结果包括量化矩阵H'的模值的量化值|H|,M个元素分别对应的相位(φ
1,1,...,φ
i,1,...,φ
M,1)的量化值、第M个元素至第2个元素分别对应的变换相位(ψ
M,1,...,ψ
i,1,...,ψ
2,1)的量化值,以使网络设备根据以下公式恢复H
1:
对角阵D为:
第k个Givens旋转矩阵为:
其中,i为小于等于M的正整数,第M个元素至第2个元素分别对应的变换相位(ψ
M,1,...,ψ
i,1,...,ψ
2,1)是根据信道矩阵H和对角阵D得到的,e
1=[1,0,…,0]
T,I
i-2表示(i-2)×(i-2)的单位矩阵。
通过上述方法,即Givens变换方法,能够显著减少反馈量,即上行开销,相对于直接反馈的方式的总反馈量能够减少将近50%。
在一种可能的设计中,终端设备可以定义一个码本,码本中包含多个预先定义的预编码矩阵,每个预编码矩阵均有相对应的PMI。通过将每个预编码矩阵和信道矩阵H进行匹配后选择最接近于信道矩阵H的预编码矩阵,并反馈对应的PMI。
在一种可能的设计中,在终端设备将M个CSI-RS对应的M个天线端口号发送至网络设备,以及将信道矩阵H对应的预编码矩阵指示PMI或信道矩阵H的量化结果发送至网络设备之后,终端设备接收网络设备通过M个天线端口号分别对应的天线端口向终端设备发送数据,数据是根据预编码矩阵编码后的数据。
通过上述方法,网络设备根据M个天线端口号选择模拟预编码的权值,并根据信道矩阵H对应的PMI或信道矩阵H的量化结果确定预编码矩阵,然后将需要发送至终端设备的数据经预编码矩阵编码后发送给终端设备。
第二方面,本申请提供一种CSI-RS测量反馈方法,该方法包括:网络设备发送S个CSI-RS,网络设备接收终端设备发送的M个CSI-RS对应的M个天线端口号,以及信道矩阵H对应的PMI或信道矩阵H的量化结果,其中,每个CSI-RS对应一个天线端口号,S为正整数,信道矩阵H对应M个CSI-RS,信道矩阵H中包括M个元素,S≥M,M为正整数。
在一种可能的设计中,M个CSI-RS是终端设备根据S个CSI-RS分别对应的信号接收强度筛选出的信号接收强度从高到低的M个CSI-RS。
在一种可能的设计中,网络设备接收终端设备发送的M个CSI-RS对应的M个天线端口号可能通过以下两种方法:
方法1:网络设备接收终端设备在PUSCH或PUCCH上发送的M个CSI-RS对应的M个天线端口号;
方法2:网络设备接收终端设备发送的第一码本中对应M个天线端口号的第一矩阵的PMI,第一码本中包括多个预先定义的第一矩阵,每个第一矩阵对应一个PMI,每个第一 矩阵均为S×1矩阵,每个第一矩阵中的S个元素与S个CSI-RS对应的S个天线端口号一一对应,在对应M个天线端口号的第一矩阵中M个天线端口号分别对应的元素的取值均为1,剩余S-M个元素的取值均为0。
在一种可能的设计中,信道矩阵H的量化结果包括信道矩阵H对应的量化矩阵H'中包括的M个元素分别对应的模值的量化值和相位的量化值。
在一种可能的设计中,信道矩阵H的量化结果包括M组取值,第i组取值包括第i个k
1的取值和第i个k
2的取值,分别对应|h
i1|和φ
i1;
其中,a表示量化的最小值,b表示量化的最大值,B
amp表示|h
i1|的量化比特数,B
φ表示φ
i1的量化比特数,i为小于等于M的正整数,M组取值均满足吞吐量最大化原则或估计信干噪比最大化原则。
在一种可能的设计中,信道矩阵H的量化结果包括量化矩阵H'的模值的量化值|H|,M个元素分别对应的相位(φ
1,1,...,φ
i,1,...,φ
M,1)的量化值、第M个元素至第2个元素分别对应的变换相位(ψ
M,1,...,ψ
i,1,...,ψ
2,1)的量化值,以使网络设备根据以下公式恢复H
1:
对角阵D为:
第k个Givens旋转矩阵为:
其中,i为小于等于M的正整数,第M个元素至第2个元素分别对应的变换相位(ψ
M,1,...,ψ
i,1,...,ψ
2,1)是根据信道矩阵H和对角阵D得到的,e
1=[1,0,…,0]
T,I
i-2表示(i-2)×(i-2)的单位矩阵。
在一种可能的设计中,在网络设备接收终端设备发送的M个CSI-RS对应的M个天线端口号,以及信道矩阵H对应的PMI或信道矩阵H的量化结果之后网络设备通过M个天 线端口号分别对应的天线端口向终端设备发送数据,数据是根据预编码矩阵编码后的数据。
第三方面,本申请提供一种终端设备,包括:存储器,处理器,收发器,存储器存储有指令,当指令被处理器执行时,使得,收发器,用于接收网络设备发送的S个信道状态信息参考信号CSI-RS,其中,每个CSI-RS对应一个天线端口号,S为正整数;收发器,还用于将M个CSI-RS对应的M个天线端口号发送至网络设备,以及将信道矩阵H对应的预编码矩阵指示PMI或信道矩阵H的量化结果发送至网络设备,信道矩阵H对应M个CSI-RS,信道矩阵H中的任一行包括M个元素,S>M,或者S=M,M为正整数。
可选的,M可以是网络设备配置的,或者终端设备确定的。
在一种可能的设计中,M个CSI-RS是终端设备根据S个CSI-RS分别对应的信号接收强度筛选出的信号接收强度从高到低的M个CSI-RS。
在一种可能的设计中,收发器,具体用于:在物理上行共享信道PUSCH或PUCCH上发送M个天线端口号;或者,发送第一码本中对应M个天线端口号的第一矩阵的PMI,第一码本中包括多个预先定义的第一矩阵,每个第一矩阵对应一个PMI,每个第一矩阵均为S×1矩阵,每个第一矩阵中的S个元素与S个CSI-RS对应的S个天线端口号一一对应,在对应M个天线端口号的第一矩阵中M个天线端口号分别对应的元素的取值均为1,剩余S-M个元素的取值均为0。
在一种可能的设计中,信道矩阵H的量化结果包括信道矩阵H对应的量化矩阵H'中包括的M个元素分别对应的模值的量化值和相位的量化值。
在一种可能的设计中,信道矩阵H的量化结果包括M组取值,第i组取值包括第i个k
1的取值和第i个k
2的取值,分别对应|h
i1|和φ
i1;
其中,a表示量化的最小值,b表示量化的最大值,B
amp表示|h
i1|的量化比特数,B
φ表示φ
i1的量化比特数,i为小于等于M的正整数,M组取值均满足吞吐量最大化原则或估计信干噪比最大化原则。
在一种可能的设计中,信道矩阵H的量化结果包括量化矩阵H'的模值的量化值|H|,M个元素分别对应的相位(φ
1,1,...,φ
i,1,...,φ
M,1)的量化值、第M个元素至第2个元素分别对应的变换相位(ψ
M,1,...,ψ
i,1,...,ψ
2,1)的量化值,以使网络设备根据以下公式恢复H
1:
对角阵D为:
第k个Givens旋转矩阵为:
其中,i为小于等于M的正整数,第M个元素至第2个元素分别对应的变换相位(ψ
M,1,...,ψ
i,1,...,ψ
2,1)是根据信道矩阵H和对角阵D得到的,e
1=[1,0,…,0]
T,I
i-2表示(i-2)×(i-2)的单位矩阵。
在一种可能的设计中,收发器,还用于:在将M个CSI-RS对应的M个天线端口号发送至网络设备,以及将信道矩阵H对应的预编码矩阵指示PMI或信道矩阵H的量化结果发送至网络设备之后,接收网络设备通过M个天线端口号分别对应的天线端口向终端设备发送数据,数据是根据预编码矩阵编码后的数据。
第四方面,本申请提供一种网络设备,包括,存储器,处理器,收发器,存储器存储有指令,当指令被处理器执行时,使得,收发器,用于发送S个CSI-RS,其中,每个CSI-RS对应一个天线端口号,S为正整数;收发器,还用于接收终端设备发送的M个CSI-RS对应的M个天线端口号,以及信道矩阵H对应的PMI或信道矩阵H的量化结果,其中,信道矩阵H对应M个CSI-RS,信道矩阵H中包括M个元素,S≥M,M为正整数。
在一种可能的设计中,M个CSI-RS是终端设备根据S个CSI-RS分别对应的信号接收强度筛选出的信号接收强度从高到低的M个CSI-RS。
在一种可能的设计中,收发器,具体用于接收终端设备在PUSCH或PUCCH上发送的M个CSI-RS对应的M个天线端口号;或者接收终端设备发送的第一码本中对应M个天线端口号的第一矩阵的PMI,第一码本中包括多个预先定义的第一矩阵,每个第一矩阵对应一个PMI,每个第一矩阵均为S×1矩阵,每个第一矩阵中的S个元素与S个CSI-RS对应的S个天线端口号一一对应,在对应M个天线端口号的第一矩阵中M个天线端口号分别对应的元素的取值均为1,剩余S-M个元素的取值均为0。
在一种可能的设计中,信道矩阵H的量化结果包括信道矩阵H对应的量化矩阵H'中包括的M个元素分别对应的模值的量化值和相位的量化值。
在一种可能的设计中,信道矩阵H的量化结果包括M组取值,第i组取值包括第i个k
1的取值和第i个k
2的取值,分别对应|h
i1|和φ
i1;
其中,a表示量化的最小值,b表示量化的最大值,B
amp表示|h
i1|的量化比特数,B
φ表示φ
i1的量化比特数,i为小于等于M的正整数,M组取值均满足吞吐量最大化原则或估计信干噪比最大化原则。
在一种可能的设计中,信道矩阵H的量化结果包括量化矩阵H'的模值的量化值|H|,M个元素分别对应的相位(φ
1,1,...,φ
i,1,...,φ
M,1)的量化值、第M个元素至第2个元素分别对应的变换相位(ψ
M,1,...,ψ
i,1,...,ψ
2,1)的量化值,以使网络设备根据以下公式恢复H
1:
对角阵D为:
第k个Givens旋转矩阵为:
其中,i为小于等于M的正整数,第M个元素至第2个元素分别对应的变换相位(ψ
M,1,...,ψ
i,1,...,ψ
2,1)是根据信道矩阵H和对角阵D得到的,e
1=[1,0,…,0]
T,I
i-2表示(i-2)×(i-2)的单位矩阵。
在一种可能的设计中,收发器,用于在网络设备接收终端设备发送的M个CSI-RS对应的M个天线端口号,以及信道矩阵H对应的PMI或信道矩阵H的量化结果之后,通过M个天线端口号分别对应的天线端口向终端设备发送数据,数据是根据预编码矩阵编码后的数据。
第五方面,本申请提供一种CSI-RS测量反馈装置,该装置包括接收单元和发送单元,其中,接收单元用于执行以上第一方面中终端设备执行的接收步骤,发送单元用于执行第一方面中终端设备执行的发送步骤。
第六方面,本申请提供一种CSI-RS测量反馈装置,该装置包括发送单元和接收单元,其中,接收单元用于执行以上第二方面中网络设备执行的接收步骤,发送单元用于执行第二方面中网络设备执行的发送步骤。
第七方面,本申请实施例还提供了一种通信***,该通信***包括上述第二方面所述的网络设备和上述第一方面所述的终端设备。
第八方面,本申请实施例还提供了第一种计算机存储介质,存储有计算机可执行指令,所述计算机可执行指令用于执行本申请上述第一方面的方法,或用于执行本申请上述第二方面的方法。
第九方面,本申请实施例还提供了第一种计算机程序产品,所述计算机程序产品包括存储在上述第一种计算机存储介质上的计算机程序,所述计算机程序包括程序指令,当所述程序指令被计算机执行时,使所述计算机执行本申请上述第一方面的方法;或所述计算机程序产品包括存储在上述第二种计算机存储介质上的计算机程序,所述计算机程序包括程序指令,当所述程序指令被计算机执行时,使所述计算机执行本申请上述第二方面的方法。
第十方面,本申请还提供了一种芯片,所述芯片包括处理器和存储器,所述处理器用于读取所述存储器中存储的代码,以实现第一方面中的方法以及各个可能设计,或实现第二方面的方法以及各个可能设计。
图1为本申请中CSI-RS测量反馈方法的概述流程图;
图2为本申请中CSI-RS测量反馈装置的结构示意图之一;
图3为本申请中CSI-RS测量反馈装置的结构示意图之二;
图4为本申请中终端设备的结构示意图;
图5为本申请中网络设备的结构示意图。
下面结合附图,对本申请的实施例进行描述。
本申请描述的技术可以采用各种无线接入技术的无线通信***,例如采用码分多址(code division multiple access,CDMA),频分多址(frequency division multiple access,FDMA),时分多址(time division multiple access,TDMA),正交频分多址(orthogonal frequency division multiple access,OFDMA),单载波频分多址(single carrier-frequency division multiple access,SC-FDMA)等接入技术的***,还适用于后续的演进***,如第五代5G(还可以称为新无线电(new radio,NR))***等。
本申请实施例涉及的网元包括网络设备和终端。网络设备是终端通过无线方式接入到该移动通信***中的接入设备,可以是基站(NodeB)、演进型基站(eNodeB)、5G移动通信***中的基站、未来移动通信***中的基站或WiFi***中的接入节点等,本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。
终端设备(terminal equipment)可以简称为终端、也可以为用户设备(user equipment,UE)、移动台(mobile station,MS)、移动终端(mobile terminal,MT)等。终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality,VR)终端设备、增强现实(augmented reality,AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。
假设网络设备的天线端口数为S,为了获取信道信息,网络设备使用多个波束发射信道状态信息参考信号(channel state information reference signal,CSI-RS),终端设备根据CSI-RS进行信道估计,对信道估计结果量化并反馈信道信息。在网络设备获得信道信息后,网络设备根据信道信息对数据做预编码并发送给终端设备,从而使得终端设备能够接收该数据。而模拟预编码的权值一般不变,因此可能对数模混合架构的性能带来影响。
本申请在上述基础上提供一种CSI-RS测量反馈方法,用以优化上述过程,参阅图1所示,该方法包括:
步骤100:网络设备向终端设备发送S个CSI-RS,其中,每个CSI-RS对应一个天线端口号,S为正整数。
步骤110:终端设备根据网络设备发送的S个CSI-RS,将其中M个CSI-RS对应的M个天线端口号发送至网络设备,以及将信道矩阵H对应的预编码矩阵指示(precoding matrix indicator,PMI)或信道矩阵H的量化结果发送至网络设备。其中,信道矩阵H对应M个CSI-RS,即信道矩阵H是根据M个CSI-RS确定的,信道矩阵H中的任一行包括M个元素,即对应M个发送天线端口,S>M,或者S=M,M为正整数。或者,信道矩阵H中的任一列包括M个元素,即对应M个发送天线端口。可选的,M可以是网络设备配置的,或者终端设备确定的。
在一种可能的设计中,M个CSI-RS是终端设备根据S个CSI-RS分别对应的信号接收强度筛选出的信号接收强度从高到低的M个CSI-RS。通过上述方法,M个CSI-RS为信号接收强度较好的CSI-RS,以辅助网络设备选择模拟预编码的权值,使得M个天线端口号对应的M个模拟波束能更好地指向终端设备。
这里的信号接收强度可以是指参考信号接收功率(reference signal receiving power,RSRP),RSRP是代表无线信号强度的关键参数以及物理层测量需求之一,是在某个符号内承载参考信号的所有资源粒子(resource element,RE)上接收到的信号功率的平均值。
针对步骤110,在一种可能的设计中,终端设备将M个CSI-RS对应的M个天线端口号发送至网络设备,可以采用但不限于以下方法:
方法1:终端设备在物理上行共享信道(physical uplink shared channel,PUSCH)或者物理上行控制信道(physical uplink control channe,PUCCH)上直接发送M个天线端口号。
例如,S个天线端口的序号分别为1,2,…S,终端设备可以在PUSCH或PUCCH上反馈M个天线端口号给网络设备;或者也可以反馈天线端口号的个数M及对应的各个天线端口号给网络设备。
例如,M个天线端口号还可以采用比特位图(bitmap)形式反馈至网络设备。
方法2:终端设备发送第一码本中对应M个天线端口号的第一矩阵的PMI,第一码本中包括多个预先定义的第一矩阵,每个第一矩阵对应一个PMI,每个第一矩阵均为S×1矩阵,每个第一矩阵中的S个元素与S个CSI-RS对应的S个天线端口号一一对应,在对应M个天线端口号的第一矩阵中M个天线端口号分别对应的元素的取值均为1,剩余S-M个元素的取值均为0。
具体的,第一矩阵的结构可以为W=[0,1,1,…,0],W是一个S×1的矩阵,其中有M个元素为1,其余元素为0。
例如,终端设备选择出信号接收强度从高到低的M个CSI-RS,确定对应的第一矩阵W并反馈对应的PMI给网络设备。
因此,采用上述方法2反馈M个天线端口号,仅需反馈对应M个天线端口号的第一矩阵的PMI,可以节省上行开销。
进一步地,在终端从S个CSI-RS中确定M个CSI-RS后,终端根据该M个CSI-RS确定对应的信道矩阵H,并进一步获得信道矩阵H的量化结果。本申请中信道矩阵H的量化结果可以为以下两种形式。
第一种形式:信道矩阵H的量化结果包括信道矩阵H对应的量化矩阵H'中包括的M个元素分别对应的模值的量化值和相位的量化值。
在一种可能的设计中,信道矩阵H的量化结果包括M组取值,第i组取值包括第i个k
1的取值和第i个k
2的取值,分别对应|h
i1|和φ
i1,其中,
其中,a表示量化的最小值,b表示量化的最大值,B
amp表示|h
i1|的量化比特数,B
φ表示φ
i1的量化比特数,i为小于等于M的正整数,信道矩阵H的量化结果是利用吞吐量最大化原则或估计信干噪比(signal to interference plus noise ratio,SINR)最大化原则确定的,本申请不涉及对上述原则的改进,此处不再赘述。
第二种形式:信道矩阵H的量化结果包括量化矩阵H'的模值的量化值|H|,M个元素分别对应的相位(φ
1,1,...,φ
i,1,...,φ
M,1)的量化值、第M个元素至第2个元素分别对应的变换相位(ψ
M,1,...,ψ
i,1,...,ψ
2,1)的量化值,以使网络设备根据以下公式恢复H
1:
其中,对角阵D为:
第k个Givens旋转矩阵为:
其中,i为小于等于M的正整数,第M个元素至第2个元素分别对应的变换相位(ψ
M,1,...,ψ
i,1,...,ψ
2,1)是根据信道矩阵H和对角阵D得到的,e
1=[1,0,…,0]
T,I
i-2表示(i-2)×(i-2)的单位矩阵。
例如,ψ
i,1由信道矩阵H计算得到,计算方法并不做限定。例如令x
1等于矩阵D
TH的第1行第1列上的元素,x
2等于D
TH的第2行第1列上的元素,则有
须知,本申请对ψ
i,1的计算方法并不做限定。
因此,Givens变换方法能够显著减少反馈量,即上行开销,相对于直接反馈的第一种方式的总反馈量能够减少将近50%。
因此,终端可以采用上述两种形式中的任一种形式获得信道矩阵H的量化结果,发送至网络设备。
在一种可能的设计中,终端设备可以定义一个码本,码本中包含多个预先定义的预编码矩阵,每个预编码矩阵均有相对应的PMI。通过将每个预编码矩阵和信道矩阵H进行匹配后选择最接近于信道矩阵H的预编码矩阵,并反馈对应的PMI。
例如,终端使用类似于LTE release 10,12,13,14中的码本对信道矩阵H进行量化,反馈码本中选择最接近于信道矩阵H的预编码矩阵对应的PMI。
进一步地,在步骤110之后,在一种可能的设计中,终端设备接收网络设备通过M个天线端口号分别对应的天线端口向终端设备发送数据,数据是根据预编码矩阵编码后的数据。
具体的,网络对M个天线端口号对应的发射波束进行模拟预编码,以及根据信道矩阵H对应的PMI或所述信道矩阵H的量化结果得到预编码矩阵。然后,网络设备通过M个天线端口号分别对应的天线端口向终端设备发送数据,数据是根据预编码矩阵编码后的数据。
在本申请中,网络设备通过S个天线端口向终端设备发送与S个天线端口对应的S个CSI-RS。终端设备对S个天线端口发送的S个CSI-RS进行测量,选定其中的M个CSI-RS对应的M个天线端口的天线端口号,即M个天线端口号,终端设备反馈M个天线端口号,和信道矩阵H对应的PMI或信道矩阵H的量化结果。信道矩阵H是根据M个CSI-RS确定的。网络设备根据M个天线端口号确定M个模拟预编码的权值,并根据M个模拟预编码的权值确定模拟波束,使该模拟波束能更好地指向终端设备,进一步地,网络设备根据信道矩阵H对应的PMI或信道矩阵H的量化结果得到预编码矩阵,通过M个天线端口号分别对应的天线端口向终端设备发送数据,其中,网络设备向终端设备发送的数据是根据预编码矩阵编码后的数据。因此,采用本申请提供的方法可以提高吞吐率且能够改善频谱利用效率。
基于以上实施例,本申请实施例提供了一种CSI-RS测量反馈装置,对应终端设备,用于实现如图1所示的方法,参阅图2所示,所述CSI-RS测量反馈装置200包括:接收单元201和发送单元202。其中,接收单元201,用于接收网络设备发送的S个CSI-RS;发送单元202,用于根据接收单元201接收到的网络设备发送的S个CSI-RS,将其中M个CSI-RS对应的M个天线端口号发送至网络设备,以及将信道矩阵H对应的PMI或信 道矩阵H的量化结果发送至网络设备。具体参见如图1所示的方法实施例,本申请在此不再赘述。
基于以上实施例,本申请实施例提供了一种CSI-RS测量反馈装置,对应网络设备,用于实现如图1所示的方法,参阅图3所示,所述CSI-RS测量反馈装置300包括:发送单元301和接收单元302。其中,发送单元301,用于发送S个CSI-RS;接收单元302,用于接收终端设备根据接收到的网络设备发送的S个CSI-RS,发送的M个CSI-RS对应的M个天线端口号,以及信道矩阵H对应的PMI或信道矩阵H的量化结果。具体参见如图1所示的方法实施例,本申请在此不再赘述。
其中,信道矩阵H对应M个CSI-RS,即信道矩阵H是根据M个CSI-RS确定的,信道矩阵H中的任一行包括M个元素,即对应M个发送天线端口,S>M,或者S=M,M为正整数。或者,信道矩阵H中的任一列包括M个元素,即对应M个发送天线端口。
应理解以上终端设备和网络设备的各个单元的划分仅仅是一种逻辑功能的划分,实际实现时可以全部或部分集成到一个物理实体上,也可以物理上分开。且这些单元可以全部以软件通过处理元件调用的形式实现;也可以全部以硬件的形式实现;还可以部分单元以软件通过处理元件调用的形式实现,部分单元以硬件的形式实现。例如处理单元可以为单独设立的处理元件,也可以集成在某一个芯片中实现,此外,也可以以程序的形式存储于存储器中,由某一个处理元件调用并执行该单元的功能。其它单元的实现与之类似。此外这些单元全部或部分可以集成在一起,也可以独立实现。这里所述的处理元件可以是一种集成电路,具有信号的处理能力。在实现过程中,上述方法的各步骤或以上各个单元可以通过处理器元件中的硬件的集成逻辑电路或者软件形式的指令完成。此外,以上接收单元是一种控制接收的单元,可以通过终端设备或网络设备的接收装置,例如天线和射频装置接收信息。以上发送单元是一种控制发送的单元,可以通过终端设备或网络设备的发送装置,例如天线和射频装置发送信息。
例如,以上这些单元可以是被配置成实施以上方法的一个或多个集成电路,例如:一个或多个特定集成电路(Application Specific Integrated Circuit,ASIC),或,一个或多个数字信号处理器(digital singnal processor,DSP),或,一个或者多个现场可编程门阵列(Field Programmable Gate Array,FPGA)等。再如,当以上某个单元通过处理元件调度程序的形式实现时,该处理元件可以是通用处理器,例如中央处理器(Central Processing Unit,CPU)或其它可以调用程序的处理器。再如,这些单元可以集成在一起,以片上***(system-on-a-chip,SOC)的形式实现。
基于以上实施例,本申请实施例还提供了一种终端设备,用于实现如图1所示的方法,参阅图4所示,所述终端设备400包括:收发器401、处理器402和存储器403,其中,上述图2中接收单元201和发送单元202的功能通过所述收发器401实现。
所述存储器403,用于存放程序、指令等。具体地,程序可以包括程序代码,该程序代码包括计算机操作指令。所述存储器403可能包含随机存取存储器(random access memory,RAM),也可能还包括非易失性存储器,例如至少一个磁盘存储器。所述处理器402执行所述存储器403所存放的应用程序,从而实现如图1所示的方法,具体参见如图1所示的方法实施例,本申请在此不再赘述。
基于以上实施例,本申请实施例还提供了一种网络设备,用于实现如图1所示的方法,参阅图5所示,所述终端设备500包括:收发器501、处理器502、存储器503,其中,图 3中的发送单元301和接收单元302的功能可以通过所述收发器501实现。
所述存储器503,用于存放程序、指令等。具体地,程序可以包括程序代码,该程序代码包括计算机操作指令。所述存储器503可能包含RAM,也可能还包括非易失性存储器(non-volatile memory),例如至少一个磁盘存储器。所述处理器502执行所述存储器503所存放的应用程序,从而实现如图1所示的方法,具体参见如图1所示的方法实施例,本申请在此不再赘述。
本领域内的技术人员应明白,本申请实施例可提供为方法、***、或计算机程序产品。因此,本申请实施例可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本申请实施例可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请实施例是参照根据本申请实施例的方法、设备(***)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然,本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请的精神和范围。这样,倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内,则本申请也意图包含这些改动和变型在内。
Claims (21)
- 一种信道状态信息参考信号CSI-RS测量反馈方法,其特征在于,该方法包括:接收来自网络设备的S个信道状态信息参考信号CSI-RS,其中,每个CSI-RS对应一个天线端口号,S为正整数;将M个CSI-RS对应的M个天线端口号发送至所述网络设备,以及将信道矩阵H对应的预编码矩阵指示PMI或所述信道矩阵H的量化结果发送至所述网络设备,所述信道矩阵H对应所述M个CSI-RS,所述信道矩阵H中的任一行包括M个元素,S>M,或者S=M,M为正整数。
- 如权利要求1所述的方法,其特征在于,所述M个CSI-RS是根据所述S个CSI-RS分别对应的信号接收强度筛选出的信号接收强度从高到低的M个CSI-RS。
- 如权利要求1或2所述的方法,其特征在于,将所述M个CSI-RS对应的M个天线端口号发送至所述网络设备,包括:在物理上行共享信道PUSCH或者物理上行控制信道PUCCH上发送所述M个天线端口号;或者发送第一码本中对应所述M个天线端口号的第一矩阵的PMI,所述第一码本中包括多个预先定义的第一矩阵,每个第一矩阵对应一个PMI,每个第一矩阵均为S×1矩阵,每个第一矩阵中的S个元素与所述S个CSI-RS对应的S个天线端口号一一对应,在所述对应所述M个天线端口号的第一矩阵中所述M个天线端口号分别对应的元素的取值均为1,剩余S-M个元素的取值均为0。
- 如权利要求1-3任一项所述的方法,其特征在于,所述信道矩阵H的量化结果包括所述信道矩阵H对应的量化矩阵H'中包括的M个元素分别对应的模值的量化值和相位的量化值。
- 如权利要求1-3任一项所述的方法,其特征在于,所述信道矩阵H的量化结果包括所述量化矩阵H'的模值的量化值|H|,M个元素分别对应的相位(φ 1,1,...,φ i,1,...,φ M,1)的量化值、第M个元素至第2个元素分别对应的变换相位(ψ M,1,…,ψ i,1,…,ψ 2,1)的量化值,以使所述网络设备根据以下公式恢复H 1:对角阵D为:第k个Givens旋转矩阵为:其中,i为小于等于M的正整数,第M个元素至第2个元素分别对应的变换相位(ψ M,1,…,ψ i,1,…,ψ 2,1)是根据所述信道矩阵H和所述对角阵D得到的,e 1=[1,0,…,0] T,I i-2表示(i-2)×(i-2)的单位矩阵。
- 如权利要求1-6任一项所述的方法,其特征在于,在将所述M个CSI-RS对应的M个天线端口号发送至所述网络设备,以及将信道矩阵H对应的预编码矩阵指示PMI或所述信道矩阵H的量化结果发送至所述网络设备之后,还包括:接收来自所述网络设备所述M个天线端口号分别对应的天线端口的数据,所述数据是根据所述预编码矩阵编码后的数据。
- 一种信道状态信息参考信号CSI-RS测量反馈方法,其特征在于,该方法包括:发送S个CSI-RS,其中,每个CSI-RS对应一个天线端口号,S为正整数;接收来自终端设备的M个CSI-RS对应的M个天线端口号,以及信道矩阵H对应的PMI或所述信道矩阵H的量化结果,其中,所述信道矩阵H对应所述M个CSI-RS,所述信道矩阵H中包括M个元素,S≥M,M为正整数。
- 如权利要求8所述的方法,其特征在于,所述M个CSI-RS是所述终端设备根据所述S个CSI-RS分别对应的信号接收强度筛选出的信号接收强度从高到低的M个CSI-RS。
- 如权利要求8或9所述的方法,其特征在于,所述网络设备接收来自所述终端设备的M个CSI-RS对应的M个天线端口号,包括:接收所述终端设备在物理上行共享信道PUSCH或物理上行控制信道PUCCH上发送的所述M个CSI-RS对应的M个天线端口号;或者接收所述终端设备发送的第一码本中对应M个天线端口号的第一矩阵的PMI,所述第一码本中包括多个预先定义的第一矩阵,每个第一矩阵对应一个PMI,每个第一矩阵均为S×1矩阵,每个第一矩阵中的S个元素与所述S个CSI-RS对应的S个天线端口号一一对应,在所述对应M个天线端口号的第一矩阵中所述M个天线端口号分别对应的元素的取值均为1,剩余S-M个元素的取值均为0。
- 如权利要求8-10任一项所述的方法,其特征在于,所述信道矩阵H的量化结果包括所述信道矩阵H对应的量化矩阵H'中包括的M个元素分别对应的模值的量化值和相 位的量化值。
- 如权利要求8-12任一项所述的方法,其特征在于,所述信道矩阵H的量化结果包括所述量化矩阵H'的模值的量化值|H|,M个元素分别对应的相位(φ 1,1,...,φ i,1,...,φ M,1)的量化值、第M个元素至第2个元素分别对应的变换相位(ψ M,1,…,ψ i,1,…,ψ 2,1)的量化值,以根据以下公式恢复H 1:对角阵D为:第k个Givens旋转矩阵为:其中,i为小于等于M的正整数,第M个元素至第2个元素分别对应的变换相位(ψ M,1,…,ψ i,1,…,ψ 2,1)是根据所述信道矩阵H和所述对角阵D得到的,e 1=[1,0,…,0] T,I i-2表示(i-2)×(i-2)的单位矩阵。
- 如权利要求8-13任一项所述的方法,其特征在于,在接收来自所述终端设备的M个CSI-RS对应的M个天线端口号,以及信道矩阵H对应的PMI或所述信道矩阵H的量化结果之后,包括:通过所述M个天线端口号分别对应的天线端口向所述终端设备发送数据,所述数据是根据所述预编码矩阵编码后的数据。
- 一种终端设备,其特征在于,包括:收发器、处理器和存储器,其中:所述存储器,用于存储程序;所述收发器,用于收发数据;所述处理器,用于调用并执行所述存储器中存储的程序,通过所述收发器收发数据来实现如权利要求1至权利要求7任一项所述的方法。
- 一种网络设备,其特征在于,收发器、处理器和存储器,其中:所述存储器,用于存储程序;所述收发器,用于收发数据;所述处理器,用于调用并执行所述存储器中存储的程序,通过所述收发器收发数据来实现如权利要求8至权利要求14任一项所述的方法。
- 一种通信装置,其特征在于,包括处理器和存储器,所述处理器用于执行所述存储器存储的代码,使得所述通信装置执行如权利要求1至14任一项所述的方法。
- 一种通信装置,其特征在于,用于执行如权利要求1至14任一项所述的方法。
- 一种计算机存储介质,其特征在于,存储有计算机指令,当所述指令被执行时,如权利要求1-至14任一项所述的方法被执行。
- 一种程序产品,其特征在于,存储有计算机指令,当所述指令被执行时,如权利要求1-至14任一项所述的方法被执行。
- 一种通信***,其特征在于,包括如权利要求15所述的终端设备和如权利要求16所述的网络设备。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18851909.4A EP3661074B1 (en) | 2017-08-28 | 2018-08-27 | Csi-rs measurement feedback method and device |
US16/797,482 US11218208B2 (en) | 2017-08-28 | 2020-02-21 | CSI-RS measurement feedback method and device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201710751755.9A CN109428637B (zh) | 2017-08-28 | 2017-08-28 | 一种csi-rs测量反馈方法及设备 |
CN201710751755.9 | 2017-08-28 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/797,482 Continuation US11218208B2 (en) | 2017-08-28 | 2020-02-21 | CSI-RS measurement feedback method and device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019042258A1 true WO2019042258A1 (zh) | 2019-03-07 |
Family
ID=65502652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2018/102539 WO2019042258A1 (zh) | 2017-08-28 | 2018-08-27 | 一种csi-rs测量反馈方法及设备 |
Country Status (4)
Country | Link |
---|---|
US (1) | US11218208B2 (zh) |
EP (1) | EP3661074B1 (zh) |
CN (1) | CN109428637B (zh) |
WO (1) | WO2019042258A1 (zh) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110535512B (zh) * | 2018-10-31 | 2023-06-30 | 中兴通讯股份有限公司 | 一种报告天线端口加权矢量的方法、装置和*** |
CN112242862A (zh) * | 2019-07-18 | 2021-01-19 | ***通信有限公司研究院 | 一种信息上报方法、终端及网络侧设备 |
CN113872649B (zh) * | 2020-06-30 | 2023-03-10 | 华为技术有限公司 | 一种信道状态信息的反馈方法及通信装置 |
CN112636801B (zh) * | 2020-11-20 | 2021-12-28 | 鹏城实验室 | 一种毫米波混合预编码方法、智能终端及存储介质 |
WO2023179318A1 (en) * | 2022-03-24 | 2023-09-28 | Mediatek Inc. | Method and apparatus for multiple-input and multiple-output (mimo) channel state information (csi) feedback |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130343299A1 (en) * | 2012-06-21 | 2013-12-26 | Samsung Electronics Co., Ltd | Method for cqi feedback without spatial feedback (pmi/ri) for tdd coordinated multi-point and carrier aggregation scenarios |
CN104579586A (zh) * | 2013-10-22 | 2015-04-29 | 电信科学技术研究院 | 信道状态信息的反馈方法和装置、以及接收方法和装置 |
US20150139112A1 (en) * | 2012-07-03 | 2015-05-21 | Lg Electronics Inc. | Method for reporting channel state information for three-dimensional beam forming in wireless communication system and apparatus therefor |
CN106301507A (zh) * | 2015-05-18 | 2017-01-04 | 工业和信息化部电信传输研究所 | 一种信道状态信息测量反馈方法 |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101291192B (zh) * | 2007-04-18 | 2012-01-11 | 中兴通讯股份有限公司 | 时分双工方式下下行多用户多输入多输出的预编码方法 |
KR20120119175A (ko) * | 2011-04-20 | 2012-10-30 | 주식회사 팬택 | 무선 통신 시스템에 있어서 채널 상태 정보를 송수신하는 방법 및 장치 |
US20140105316A1 (en) * | 2011-04-26 | 2014-04-17 | Zte Corporation | Method and system for spatial channel state information feedback for multiple-input multiple-output (mimo) |
US8848673B2 (en) * | 2011-12-19 | 2014-09-30 | Ofinno Technologies, Llc | Beam information exchange between base stations |
KR101668709B1 (ko) * | 2013-02-24 | 2016-11-09 | 엘지전자 주식회사 | 무선 통신 시스템에서 3-차원 빔포밍을 위한 채널 상태 정보를 보고하는 방법 및 이를 위한 장치 |
CN110212958B (zh) * | 2013-05-21 | 2021-03-26 | 上海朗帛通信技术有限公司 | 一种移动通信***中的信道信息反馈方法和装置 |
JP6114153B2 (ja) * | 2013-09-26 | 2017-04-12 | 株式会社Nttドコモ | 基地局、移動局、参照信号送信方法及びチャネル品質測定方法 |
CN106209195B (zh) * | 2015-03-06 | 2020-02-11 | 电信科学技术研究院 | 信道状态信息获取方法、信道状态信息反馈方法及装置 |
JP6863275B2 (ja) * | 2015-03-24 | 2021-04-21 | ソニーグループ株式会社 | 装置 |
WO2017039399A1 (ko) * | 2015-09-03 | 2017-03-09 | 엘지전자(주) | 무선 통신 시스템에서 채널 상태 정보를 보고하기 위한 방법 및 이를 위한 장치 |
KR102585493B1 (ko) * | 2015-09-11 | 2023-10-06 | 엘지전자 주식회사 | 무선 통신 시스템에서 랭크 지시자의 비트 사이즈 결정 방식 및 이를 위한 장치 |
CN106559121B (zh) * | 2015-09-25 | 2021-07-09 | 华为技术有限公司 | 一种多天线信道测量方法和装置 |
US10536206B2 (en) * | 2015-12-17 | 2020-01-14 | Lg Electronics Inc. | Method for transmitting and receiving channel state information in wireless communication system and apparatus therefor |
CN106992837B (zh) * | 2016-01-20 | 2020-06-16 | 华为技术有限公司 | 多天线数据传输的方法、网络设备、终端设备及*** |
ES2880442T3 (es) * | 2016-03-31 | 2021-11-24 | Ericsson Telefon Ab L M | Método y dispositivos para determinar parámetros de precodificador en una red de comunicación inalámbrica |
US10567045B2 (en) * | 2016-03-31 | 2020-02-18 | Lg Electronics Inc. | Method for transmitting feedback information for DM-RS based open-loop downlink transmission in wireless communication system, and apparatus therefor |
CN109196905B (zh) * | 2016-04-01 | 2023-04-07 | 瑞典爱立信有限公司 | 用于灵活的信道状态信息-参考信号传送的***和方法 |
US20180031478A1 (en) * | 2016-07-28 | 2018-02-01 | Allan Wexler | Surface evaluation system using voltage sensitive chromophore |
CN110326228B (zh) * | 2016-08-11 | 2023-06-13 | 交互数字专利控股公司 | 用于新无线电的csi反馈方法和装置 |
-
2017
- 2017-08-28 CN CN201710751755.9A patent/CN109428637B/zh active Active
-
2018
- 2018-08-27 WO PCT/CN2018/102539 patent/WO2019042258A1/zh unknown
- 2018-08-27 EP EP18851909.4A patent/EP3661074B1/en active Active
-
2020
- 2020-02-21 US US16/797,482 patent/US11218208B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20130343299A1 (en) * | 2012-06-21 | 2013-12-26 | Samsung Electronics Co., Ltd | Method for cqi feedback without spatial feedback (pmi/ri) for tdd coordinated multi-point and carrier aggregation scenarios |
US20150139112A1 (en) * | 2012-07-03 | 2015-05-21 | Lg Electronics Inc. | Method for reporting channel state information for three-dimensional beam forming in wireless communication system and apparatus therefor |
CN104579586A (zh) * | 2013-10-22 | 2015-04-29 | 电信科学技术研究院 | 信道状态信息的反馈方法和装置、以及接收方法和装置 |
CN106301507A (zh) * | 2015-05-18 | 2017-01-04 | 工业和信息化部电信传输研究所 | 一种信道状态信息测量反馈方法 |
Also Published As
Publication number | Publication date |
---|---|
CN109428637A (zh) | 2019-03-05 |
US20200195329A1 (en) | 2020-06-18 |
EP3661074B1 (en) | 2021-08-04 |
EP3661074A1 (en) | 2020-06-03 |
US11218208B2 (en) | 2022-01-04 |
EP3661074A4 (en) | 2020-07-15 |
CN109428637B (zh) | 2022-02-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN107888246B (zh) | 基于码本的信道状态信息反馈方法及设备 | |
US10128928B2 (en) | Channel state information CSI reporting method and apparatus, and base station antenna | |
WO2019042258A1 (zh) | 一种csi-rs测量反馈方法及设备 | |
JP2019525637A (ja) | プリコーディング行列決定方法およびプリコーディング行列決定装置 | |
JP5275514B2 (ja) | 閉ループmimoビーム形成のための差分フィードバックスキーム | |
CN108631837B (zh) | 信息的传输方法和设备 | |
WO2021089046A1 (en) | Method and apparatus for channel state information feedback for joint transmission | |
CN112368948A (zh) | 多trp码本 | |
WO2017194007A1 (zh) | 一种二级预编码方法及装置 | |
US20210234584A1 (en) | Precoding matrix index reporting method, communications apparatus, and medium | |
WO2020020283A1 (zh) | 信号处理的方法和装置 | |
WO2022021443A1 (zh) | 一种预编码方法及装置 | |
CN113711512A (zh) | 上行链路控制信息 | |
EP2996375B1 (en) | Mobile station and reporting method | |
CN109891767A (zh) | 一种确定预编码矩阵的方法、装置及*** | |
CN108282204B (zh) | 通信方法、装置及*** | |
WO2019034121A1 (en) | METHOD, DEVICE AND COMPUTER-READABLE MEDIUM FOR MIMO COMMUNICATION | |
EP3512169B1 (en) | Beamforming transmission method and device | |
WO2017114513A1 (zh) | 一种csi反馈方法及装置 | |
WO2022257042A1 (zh) | 码本上报的方法、终端设备和网络设备 | |
WO2020155116A1 (zh) | 一种pmi上报方法及通信装置 | |
EP4383801A1 (en) | Communication method and apparatus | |
WO2024067251A1 (zh) | 一种通信方法及相关设备 | |
WO2023082775A1 (zh) | 参考信号的传输方法和装置 | |
WO2023011570A1 (zh) | 一种信道信息反馈的方法及通信装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18851909 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2018851909 Country of ref document: EP Effective date: 20200226 |