WO2018228266A1 - Procédé de réception et de rétroaction d'informations d'état de canal, dispositif de réception et dispositif de transmission - Google Patents

Procédé de réception et de rétroaction d'informations d'état de canal, dispositif de réception et dispositif de transmission Download PDF

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Publication number
WO2018228266A1
WO2018228266A1 PCT/CN2018/090243 CN2018090243W WO2018228266A1 WO 2018228266 A1 WO2018228266 A1 WO 2018228266A1 CN 2018090243 W CN2018090243 W CN 2018090243W WO 2018228266 A1 WO2018228266 A1 WO 2018228266A1
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layer
coefficient
transmission layer
vector
information
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PCT/CN2018/090243
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English (en)
Chinese (zh)
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金黄平
蒋鹏
毕晓艳
尚鹏
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • 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
    • H04B7/046—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account
    • H04B7/0469—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting taking physical layer constraints into account taking special antenna structures, e.g. cross polarized antennas into account
    • 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
    • H04B7/0478—Special codebook structures directed to feedback optimisation
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
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    • 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
    • H04B7/0613—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
    • H04B7/0682—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 using phase diversity (e.g. phase sweeping)
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/084—Equal gain combining, only phase adjustments
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection

Definitions

  • the present application relates to the field of communications, and in particular, to a channel state information feedback and receiving method, a receiving end device, and a transmitting end device.
  • Massive multiple-input multiple-output is one of the industry's recognized 5G key technologies, and achieves significant improvements in spectral efficiency through the use of large-scale antennas.
  • CSI channel state information
  • TDD time division duplex
  • frequency division duplex frequency division duplex
  • the codebook design is a key issue of Massive MIMO and is also a problem to be solved by the present invention.
  • the basic function of the LTE R13 MIMO codebook is to select a single codeword from a predefined codebook, or a beam selection technique.
  • one codeword corresponds to one beam direction, that is, from multiple candidates.
  • An optimal one of the codewords is selected as a CSI information in the form of a pre-coding matrix indicator (PMI).
  • PMI pre-coding matrix indicator
  • NR New Radio
  • the present application provides a channel state information feedback method, a receiving end device and a transmitting end device.
  • a channel state information feedback method provided by the application includes:
  • the sending end device generates codebook indication information of the K layer transport layer; the K is greater than or equal to 2; the codebook indication information includes beam information of the K layer transport layer, beam superposition coefficient information of the m layer transport layer, and Km layer transmission Layer beam reference information; where 0 ⁇ m ⁇ K;
  • the sending end device sends the codebook indication information of the K layer transport layer.
  • the receiving end device receives the codebook indication information of the K layer transport layer, and generates a precoding vector of each layer of the K layer transport layer according to the indication information including the K layer transport layer codebook.
  • the transmitting device sends the K-layer transport layer codebook indication information, it is not necessary to report the beam information and the beam superposition coefficients of each transport layer, which can save feedback overhead.
  • the application further provides a sender device, including:
  • a processor configured to generate codebook indication information of a K layer transmission layer; the K is greater than or equal to 2; the codebook indication information includes beam information of a K layer transmission layer, beam superposition coefficient information of an m layer transmission layer, and Km Reference information of the layer transport layer; where 0 ⁇ m ⁇ K;
  • transceiver configured to send codebook indication information of the K layer transport layer generated by the processor.
  • the application further provides a receiving end device, including:
  • a transceiver for codebook indication information of a K layer transmission layer the K is greater than or equal to 2;
  • the codebook indication information includes beam information of a K layer transmission layer, beam superposition coefficient information of an m layer transmission layer, and a Km layer Beam reference information of the transport layer; where 0 ⁇ m ⁇ K;
  • a processor configured to generate a precoding vector of each layer of the K layer transport layer according to the codebook indication information of the K layer transport layer.
  • the codebook indication information generated by the transmitting end device and sent to the receiving end device includes the codebook indication information of the K layer transport layer; the K is greater than or equal to 2;
  • the codebook indication information includes beam information of the K layer transmission layer, beam superposition coefficient information of the m layer transmission layer, and beam reference information of the Km layer transmission layer; where 0 ⁇ m ⁇ K.
  • the receiving end device can receive and generate a precoding vector of each layer in the K layer transmission layer according to the foregoing codebook indication information.
  • the foregoing transmitting device may be an access device, such as a base station, or a terminal device; the receiving device may be a terminal device or an access device, such as a base station.
  • the beam information may include information of multiple beams used to construct a precoding vector of each transport layer, such as a beam index of each beam.
  • the beam superposition coefficient information of the m layer transport layer may include a set of beam superposition coefficients of each of the plurality of beams used to construct a precoding vector of each of the m layer transport layers. And including at least one of the following: a wideband superposition coefficient and a narrowband superposition coefficient, wherein the wideband superposition coefficient may include a wideband amplitude coefficient, and the narrowband superposition coefficient may include at least one of a narrowband amplitude coefficient and a narrowband phase coefficient.
  • the beam reference information of the Km layer transport layer may include strength indicator information of the foregoing multiple beams used to construct a precoding vector of each transport layer in the Km layer transport layer, such as, but not limited to, the foregoing The intensity ranking information of each beam in the beams, or the information indicating the strongest beam, or the information indicating the strongest at least two beams and the strong ordering information of the at least two beams.
  • each transport layer in the Km layer transport layer when the receiving end device generates the precoding vector corresponding to the transport layer, in addition to applying the beam reference information, reference may also be made to the layer in the m layer transport layer.
  • Beam superposition coefficient information For example, for the transport layer a in the above-described K-m layer transport layer, beam superposition coefficient information of the transport layer b in the above m-layer transport layer can be applied.
  • each of the plurality of beams of the precoding vector used to construct the transmission layer a may be determined according to the intensity of the beam in the plurality of beams, and determined in the multiple beams corresponding to the transmission layer b.
  • the beam superposition coefficient of the determined beam may be used as the beam superposition coefficient of each of the above beams of the transmission layer a, and the beam of each of the above beams of the transmission layer a obtained by the above manner may also be adjusted.
  • the positive and negative of the narrow-band phase coefficient in the superposition coefficient, that is, the narrow-band phase coefficient is inverted. In this way, the precoding vector of the transport layer a can be orthogonal to the precoding vector of the transport layer b.
  • the beam superposition coefficient of the strongest one or more beams of the transmission layer a may be set according to the beam superposition coefficient of the strongest one or more beams of the transmission layer b according to the above method, instead of The beam superposition coefficients of the respective beams of the transmission layer b correspondingly set the beam superposition coefficients of the respective beams of the transmission layer a. Further, for the other beams other than the strongest one or more beams, beam superposition coefficients adapted to the intensities of the beams, such as default beam superposition coefficients, may be set, thereby eliminating the need to correspond to the transmission layer b. The beam superposition coefficients of the intensity beams are used to set the beam superposition coefficients of the other beams described above.
  • the plurality of beams simultaneously act on two polarization directions, wherein the upper left corner and the lower right corner of the block diagonal matrix W 1 are respectively constructed by the same set of beams b 0 -b 3 .
  • the transmission layer b is also required.
  • the beam superposition coefficient in one polarization direction of the beam superposition coefficients of the beam is set to the beam superposition coefficient in the other polarization direction of the corresponding beam of the transmission layer a, and the narrowband phase coefficient is further inverted, and
  • the beam superposition coefficient in the other polarization direction of the beam superposition coefficients of the beam of the transmission layer b is set to the beam superposition coefficient in one polarization direction of the corresponding beam of the transmission layer a without negating the narrow band phase coefficient.
  • the beam superposition coefficient of the beam b 0 of the transmission layer a is set correspondingly according to the beam superposition coefficient of the beam b 1 of the transmission layer b
  • the beam superposition coefficient p 1 c 1 of the secondary strong beam b 1 in the transmission layer b in one polarization direction should be used as the beam superposition coefficient in the other polarization direction of the beam b 0 of the transmission layer a, similarly, transmission
  • the beam superposition coefficient p 5 c 5 of the sub-strong beam in layer b should be the beam superposition coefficient in the
  • the beam superposition coefficient p 1 c 1 of the secondary strong beam b 1 in the transmission layer b in one polarization direction is used as the beam superposition coefficient in the other polarization direction of the secondary strong beam b 0 of the transmission layer a
  • the narrowband phase coefficient may be further inverted, and the beam superposition coefficient p 5 c 5 of the second strong beam b 1 in the transmission layer b in the other polarization direction is used as the secondary strong beam b 0 of the transmission layer a.
  • the pre-preparation for constructing the transport layer may be
  • the above plurality of beams of the coding vector apply beam-superimposing coefficients adapted to the intensities of these beams (obtained from the beam reference information), thereby eliminating the need to refer to the beam superposition coefficient information of the above m-layer transmission layer.
  • These beam superposition coefficients may reflect the strength or contribution of the respective beams in the process of constructing the precoding vectors described above, in other words these beam superposition coefficients correspond to the strength or contribution of the corresponding beams in the construction of the precoding vectors described above.
  • the embodiment of the present application provides a base station, which has a function of realizing the behavior of the base station in the actual method.
  • the functions may be implemented by hardware or by corresponding software implemented by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the structure of the base station includes a processor and a transceiver configured to support the base station to perform the corresponding functions in the above methods.
  • the transceiver is configured to support communication between the base station and the terminal, and send information or signaling involved in the foregoing method to the terminal, and receive information or instructions sent by the base station.
  • the base station can also include a memory for coupling with the processor that stores the necessary program instructions and data for the base station.
  • the embodiment of the present application provides a terminal, where the terminal has a function of implementing terminal behavior in the design of the foregoing method.
  • the function can be implemented by hardware, and the structure of the terminal includes a transceiver and a processor.
  • the corresponding software implementation can also be performed by hardware.
  • the hardware or software includes one or more modules corresponding to the functions described above.
  • the modules can be software and/or hardware.
  • an embodiment of the present application provides a control node, which may include a controller/processor, a memory, and a communication unit.
  • the controller/processor may be used to coordinate resource management and configuration between multiple base stations, and may be used to perform the method of channel state information feedback described in the foregoing embodiments.
  • the memory can be used to store program code and data for the control node.
  • the communication unit is configured to support the control node to communicate with the base station, for example, to send information of the configured resource to the base station.
  • the transmitting end device and the receiving end device may be a chip, which includes a processor and an interface.
  • the processor When implemented by hardware, the processor may be a logic circuit, an integrated circuit, or the like; when implemented by software, the The processor can be a general purpose processor implemented by reading software code stored in the memory, which can be integrated in the processor and can exist independently of the processor.
  • an embodiment of the present application provides a communication system, where the system includes the base station and the terminal in the foregoing aspect.
  • the control node in the above embodiment may also be included.
  • the embodiment of the present application provides a computer storage medium for storing computer software instructions used by the base station, which includes a program designed to perform the above aspects.
  • the embodiment of the present application provides a computer storage medium for storing computer software instructions used by the terminal, which includes a program designed to execute the above aspects.
  • the K-layer transmission layer codebook indication information is sent by the source device, and the codebook indication information does not quantize and report the beam superposition coefficients of all the transmission layers, but only reports the beam information and the beam superposition coefficient of the partial transmission layer and the remaining transmission layer.
  • the beam reference information therefore, the feedback and receiving techniques for implementing the channel state information provided by the present application can improve the transmission quality and save the feedback overhead of the system.
  • FIG. 1 is an exemplary schematic diagram of a wireless communication network provided by the present application.
  • FIG. 2 is a schematic flowchart of a channel state information feedback and reception method provided by the present application
  • FIG. 3 is still another schematic diagram of a channel state information feedback and reception method provided by the present application.
  • FIG. 4 is another schematic diagram of a channel state information feedback and reception method provided by the present application.
  • FIG. 5 is still another schematic diagram of a channel state information feedback and reception method provided by the present application.
  • FIG. 6 is a schematic structural diagram of a source device provided by the present application.
  • FIG. 7 is a schematic structural diagram of a receiving end device provided by the present application.
  • FIG. 1 is an exemplary schematic diagram of a wireless communication network 100 in accordance with an embodiment of the present application.
  • the wireless communication network 100 includes base stations 102-106 and terminal devices 108-122, wherein the base stations 102-106 can pass backhaul links with each other (e.g., lines between base stations 102-106) Communication is shown, which may be a wired backhaul link (eg, fiber optic, copper) or a wireless backhaul link (eg, microwave).
  • the terminal devices 108-122 can communicate with the corresponding base stations 102-106 via a wireless link (as indicated by the broken line between the base stations 102-106 and the terminal devices 108-122).
  • the base stations 102-106 are configured to provide wireless access services for the terminal devices 108-122.
  • each base station corresponds to a service coverage area (also referred to as a cell, as shown in each ellipse area in FIG. 1), and the terminal device entering the area can communicate with the base station by using a wireless signal to receive the base station.
  • Wireless access service provided.
  • multiple base stations may use Coordinated Multipoint (CoMP) technology to provide services for terminal devices in the overlapping area.
  • CoMP Coordinated Multipoint
  • the base station 102 overlaps with the service coverage area of the base station 104, and the terminal device 112 is within the overlapping area, so the terminal device 112 can receive the wireless signals from the base station 102 and the base station 104.
  • Base station 102 and base station 104 can simultaneously provide services to terminal device 112.
  • the service coverage areas of the base station 102, the base station 104, and the base station 106 have a common overlapping area, and the terminal device 120 is within the overlapping area, so the terminal device 120 can receive the base station.
  • the wireless signals 102, 104, and 106, the base stations 102, 104, and 106 can simultaneously serve the terminal device 120.
  • the base station may be referred to as a Node B (NodeB), an evolved Node B (eNodeB), and an Access Point (AP), etc., depending on the wireless communication technology used.
  • NodeB Node B
  • eNodeB evolved Node B
  • AP Access Point
  • the base station can be further divided into a macro base station for providing a macro cell, a micro base station for providing a pico cell, and a femtocell for providing Femto cell) Femto base station.
  • future base stations may use other names.
  • the terminal devices 108-118 are devices with wireless transceiving functions that can be deployed on land, including indoors or outdoors, handheld, wearable or on-board; can also be deployed on the water surface (such as ships), and can also be deployed in the air (eg, Aircraft, balloons and satellites, etc.)
  • the terminal device may be a mobile phone, a tablet (Pad), a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, and industrial control ( Wireless terminal in industrial control, wireless terminal in self driving, wireless terminal in remote medical, wireless terminal in smart grid, transportation safety A wireless terminal, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.
  • a terminal device may also be referred to as a user equipment (UE), an access terminal device, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal device, a mobile device, a UE terminal device, a terminal device, Wireless communication device, UE proxy or UE device, and the like.
  • UE user equipment
  • the base stations 102-106 and the terminal devices 108-122 can be configured with multiple antennas to support MIMO (Multiple Input Multiple Output) technology. Further, the terminal devices 108-122 can support single-user MIMO (SU-MIMO) technology or multi-user MIMO (Multi-User MIMO, MU-MIMO), where MU-MIMO can be based on Implemented by Space Division Multiple Access (SDMA) technology. Due to the configuration of multiple antennas, the base stations 102-106 and the terminal devices 108-122 can also flexibly support Single Input Single Output (SISO) technology, Single Input Multiple Output (SIMO) and multiple input.
  • SISO Single Input Single Output
  • SIMO Single Input Multiple Output
  • MIMO Multiple Input Single Output
  • multiplexing technology can be a spatial multiplexing (Spatial Multiplexing) technology.
  • SC Multiple Input Single Output
  • currently used transmit diversity may include, for example, but not limited to, Space-Time Transmit Diversity (STTD), Space-Frequency Transmit Diversity (Space-Frequency Transmit).
  • STTD Space-Time Transmit Diversity
  • Space-Frequency Transmit Diversity Space-Frequency Transmit
  • the current LTE (Long Term Evolution) standard adopts a transmit diversity method such as Space Time Block Coding (STBC), Space Frequency Block Coding (SFBC), and CDD.
  • STBC Space Time Block Coding
  • SFBC Space Frequency Block Coding
  • CDD Cyclic Delay Diversity
  • the base station 102 and the terminal devices 104-110 can communicate using various wireless communication technologies, such as, but not limited to, Time Division Multiple Access (TDMA) technology, Frequency Division Multiple Access (FDMA). Technology, Code Division Multiple Access (CDMA) technology, Time Division-Synchronous Code Division Multiple Access (TD-SCDMA), Orthogonal Frequency Division Multiple Access (OFDMA) technology Single carrier frequency division multiple access (Single Carrier FDMA, SC-FDMA) technology, Space Division Multiple Access (SDMA) technology, and evolution and derivative technologies of these technologies.
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • CDMA Code Division Multiple Access
  • TD-SCDMA Time Division-Synchronous Code Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • Single carrier frequency division multiple access Single Carrier FDMA
  • SC-FDMA Space Division Multiple Access
  • SDMA Space Division Multiple Access
  • the above wireless communication technology is adopted as a radio access technology (RAT) by many wireless communication standards, thereby constructing various wireless communication systems (or networks) well known today, including but not limited to Global System for Mobile Communications (GSM), CDMA2000, Wideband CDMA (WCDMA), WiFi defined by the 802.11 series of standards, Worldwide Interoperability for Microwave Access (WiMAX), long-term Evolution (Long Term Evolution, LTE), LTE-Advanced (LTE-A), and evolution systems of these wireless communication systems.
  • the wireless communication network shown in FIG. 1 may be any system or network in the above wireless communication system.
  • the technical solutions provided by the embodiments of the present application can be applied to the above various wireless communication technologies and wireless communication systems unless otherwise specified.
  • the terms "system” and “network” can be replaced with each other.
  • the wireless communication network 100 shown in FIG. 1 is for example only and is not intended to limit the technical solution of the present application. It should be understood by those skilled in the art that in a specific implementation process, the wireless communication network 100 further includes other devices, and the number of base stations and terminal devices may also be configured according to specific needs.
  • the network device for example, the base station, needs to obtain the channel state information, and the terminal needs to report the accurate CSI.
  • the channel state information is reported to the base station in the form of a precoding codebook.
  • the precoding codebook is first described as follows.
  • the related art in the present application is in the Chinese application number 201710284175.3, and the invention name is "a method and device for indicating and determining a precoding vector".
  • introductions which can be referred to in full text.
  • the pre-encoded codebook can be represented as a two-level codebook structure:
  • W 1 contains a beam index and a broadband superposition coefficient that require feedback
  • W 2 includes a narrow-band superposition coefficient.
  • the wideband superposition coefficient corresponds to the quantization of the wideband amplitude
  • the narrowband superposition coefficient corresponds to the quantization of the narrowband amplitude and the narrowband phase.
  • p 0 to p 7 are the broadband superposition coefficients included in W 1 in the foregoing description, and represent the quantization of the wideband amplitude.
  • ⁇ 0 ⁇ ⁇ 7 and ⁇ 0 ⁇ ⁇ 7 representing the narrowband quantized narrowband amplitude and phase of the synthesized narrowband constituting the superposition coefficients W 2 included.
  • the above scheme describes a precoding codebook corresponding to one transport layer (rank1).
  • the W2 codebook matrix will be K columns, and the corresponding W2 feedback overhead will be K times of rank1.
  • a codebook of a transport layer may be expressed as:
  • b i is the beam used to represent the CSI selection when using the beam combination method.
  • the same set of beams b i can be used to construct the codebook of each layer in the K-layer transport layer, that is, K.
  • Each layer codebook in the layer transport layer codebook uses the same set of beams b i .
  • the present application provides a channel state information feedback and reception method that can achieve low overhead. Specifically, in the foregoing wireless communication network 100, the channel state information feedback and reception method provided by the present application is implemented, including the following steps:
  • Step 200 The source device generates codebook indication information of the K layer transmission layer; the K is greater than or equal to 2; the codebook indication information includes beam information of a K layer transmission layer, beam superposition coefficient information of an m layer transmission layer, and Beam reference information of the Km layer transmission layer; where 0 ⁇ m ⁇ K;
  • the K layer transmission layer beam information is used to indicate a group of beams b1 to b4.
  • the beam information may be an index of b1 to b4.
  • the same set of beams b1 to b4 can be used to construct the codebook of each layer in the K layer transport layer, that is, each layer codebook in the K layer transport layer codebook uses the same set of beams b1 to b4.
  • the beam superposition coefficient information of the m layer transmission layer includes coefficients of each of the above beams b1 to b4 for generating precoding vectors of each of the m layer transmission layers.
  • the beam superposition coefficient information of the transport layer may include, for example but not limited to, at least one of the following values: a quantized value of the wideband amplitude coefficient, a narrowband amplitude coefficient The quantized value and the quantized value of the narrowband phase coefficient.
  • the beam superposition coefficient information usually includes quantized values of narrowband superposition coefficient quantized values and narrowband phase coefficients, and some codebook structures are also designed with quantized values of wideband superposition coefficients.
  • the beam reference information of the Km layer transport layer may have two representation manners, one is the strength and weakness order indication information of each beam in each transport layer of the Km layer transport layer; taking a group of beams b1 to b4 as an example, at Km In a transport layer of a layer transport layer, its order is strong and weak, and its order is b2, b3, b4, b1, and in another transport layer, its order is strong or weak. For b4, b2, b1, b3.
  • the other is the strongest beam indication in each transmission layer of the K-m layer transmission layer, and specifically may be the location information of the beam in the L beams of the transmission layer, where L is greater than or equal to 2.
  • the strongest beam in one transmission layer of the K-m layer transmission layer, the strongest beam is b2, and its position in the beams b1 to b4 is located at the second position.
  • the strongest beam is b4 in the order from strong to weak, and its position in the beams b1 to b4 is at the 4th position.
  • Step 201 The sending end device sends the codebook indication information of the K layer transport layer.
  • Step 202 The receiving end device receives the codebook indication information of the K layer transport layer.
  • Step 203 The receiving end device generates, according to the codebook indication information of the K layer transport layer, a precoding vector of each layer of the K layer transport layer.
  • the receiving end device determines according to the beam information of the K layer transmission layer and the narrowband superposition coefficient of the m layer transmission layer. a precoding vector of the m layer transport layer.
  • the receiving end device when the beam superposition coefficient information of the codebook indication information sent by the transmitting end includes the broadband superposition coefficient, the receiving end device according to the beam information of the K layer transmission layer, and the narrowband superposition coefficient of the m layer transmission layer a broadband superposition coefficient, determining a precoding vector of the m layer transmission layer;
  • the corresponding precoding vector of each layer can be obtained in various ways.
  • the beam superposition coefficients of the respective beams of the Km layer transmission layer are default values, and the default values of the respective beam superposition coefficients correspond to the strength and weak relationship of each beam; another way is that m
  • the beam superposition coefficients of the respective beams of the layer transport layer are assigned to the respective beams of the Km layer according to a certain mapping relationship, thereby determining the precoding vector of the Km layer transport layer.
  • mapping of the wideband amplitude coefficient or the narrowband amplitude coefficient of each element in the precoding codebook is:
  • a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a first polarization direction of the xth transmission layer in the m layer transmission layer as a start vector
  • a second of the yth transmission layer in the Km layer transmission layer a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a polarization direction as a target vector
  • a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a second polarization direction of the xth transmission layer in the m layer transmission layer is used as a starting vector; and a number of the yth transmission layer in the Km layer transmission layer
  • a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a polarization direction is used as a target vector.
  • the receiving end device If the beam reference information of the Km layer transmission layer sent by the transmitting device includes the strength indication information of each beam in each layer of the Km layer transmission layer, the receiving end device generates a precoding code of each layer of the Km layer transmission layer.
  • the beam superposition coefficient may be obtained by referring to the strong and weak indication information, or the strong indication information may not be referred to;
  • the beam superposition coefficient is obtained by referring to the strong and weak indication information, one way is to assign an element corresponding to the t-th strong beam in the starting vector to a corresponding element of the t-th strong beam in the target vector. That is to say, after the beams are sorted according to strength, the corresponding elements in the starting vector are assigned to the corresponding elements in the target vector.
  • the above-mentioned broadband amplitude coefficient, narrowband amplitude coefficient and narrowband phase coefficient are specifically expressed as shown in Table 1:
  • the beam information is b1 to b4.
  • the beam information is applicable to any of the first type of transport layer and to any of the second type of transport layers.
  • the beam superposition coefficient information of the first type of transport layer is as shown in Table 1.
  • the beam intensity in the transport layer 1 is b1, b3, b2, b4 in order from strong to weak, and the wide-band amplitude coefficients are X11, X21, X31, X41, and the narrow-band amplitude coefficients are X12, X22, X32, X42; narrow band
  • the phase coefficients are X13, X23, X33, X43;
  • the beam intensity in the transmission layer 2 is b3, b4, b1, b2 in order from strong to weak, and the broadband amplitude coefficients are Y11, Y21, Y31, Y41, and the narrowband amplitude coefficients are Y12, Y22, Y32, Y42; narrow band
  • the phase coefficients are Y13, Y23, Y33, Y43;
  • the beam intensity in the transmission layer 3 is b3, b1, b4, b2 in order from strong to weak, and the broadband amplitude coefficients are Z11, Z21, Z31, Z41, and the narrowband amplitude coefficients are Z12, Z22, Z32, Z42; narrow band
  • the phase coefficients are Z13, Z23, Z33, Z43;
  • the beam intensity of the transport layer 4 is b2, b1, b3, b4 in order from strong to weak, and the beam superposition coefficients thereof refer to the beam superposition coefficients of b1, b3, b2, b4 of the transport layer 1, specifically, the broadband amplitude thereof.
  • the coefficients are X11, X21, X31, X41, the narrowband amplitude coefficients are X12, X22, X32, X42; the narrowband phase coefficients are X13, X23, X33, X43;
  • the beam intensity of the transmission layer 5 is b2, b3, b1, b4 in order from strong to weak, and the beam superposition coefficients thereof refer to the beam superposition coefficients of b3, b4, b1, b2 of the transmission layer 2, specifically, the broadband amplitude thereof.
  • the coefficients are Y11, Y21, Y31, Y41, the narrowband amplitude coefficients are Y12, Y22, Y32, Y42; the narrowband phase coefficients are Y13, Y23, Y33, Y43;
  • the beam intensity of the transmission layer 6 is b3, b2, b1, b4 in order from strong to weak, and the beam superposition coefficients thereof refer to the beam superposition coefficients of b3, b1, b4, b2 of the transmission layer 3, specifically, the broadband amplitude thereof.
  • the coefficients are Z11, Z21, Z31, Z41, the narrow band amplitude coefficients are Z12, Z22, Z32, Z42; the narrow band phase coefficients are Z13, Z23, Z33, Z43;
  • the beam intensity of the transport layer 7 is b4, b3, b2, b1 in order from strong to weak, and the beam superposition coefficients thereof refer to the beam superposition coefficients of b1, b3, b2, b4 of the transport layer 1, specifically, the broadband amplitude thereof.
  • the coefficients are X11, X21, X31, X41, the narrowband amplitude coefficients are X12, X22, X32, X42; the narrowband phase coefficients are X13, X23, X33, X43;
  • the beam intensity of the transmission layer 8 is b1, b2, b3, b4 in order from strong to weak, and the beam superposition coefficients thereof refer to the beam superposition coefficients of b3, b4, b1, b2 of the transmission layer 2, specifically, the broadband amplitude thereof.
  • the coefficients are Y11, Y21, Y31, Y41, the narrowband amplitude coefficients are Y12, Y22, Y32, Y42; the narrowband phase coefficients are Y13, Y23, Y33, Y43;
  • the positive and negative of the beam superposition coefficients of the second type of transport layer may be adjusted (eg, the narrowband phase may be adjusted)
  • the positive and negative coefficients of the coefficients), the precoding vectors and the beam superposition coefficients of the first type of transport layer are orthogonal to the precoding vectors of the second type of transport layer set according to the beam superposition coefficients of the first type of transport layer, To reduce interference between the first transport layer and the second transport layer.
  • the beam superposition coefficient of the second type of transmission layer is set by referring to the beam superposition coefficient of the first type of transmission layer, the beam superposition coefficient of the strongest beam among the beams corresponding to the first type of the transmission layer may be set.
  • the beam superposition coefficient of the strongest beam of the second type of transmission layer is changed, and the positive and negative of the narrowband phase coefficient of the second type of transmission layer are changed; for other intensity beams, the first type of transmission layer may be referred to by the above method.
  • the beam superposition coefficients of the beams of the corresponding intensity in the corresponding beam are set to the beam superposition coefficients of the respective intensity beams of the second type of transmission layer, and the positive and negative of the narrow band phase coefficients of the second type of transmission layer are changed.
  • Table 1 is optimized according to the above method, the following Table 2 can be obtained:
  • the transport layer 1 can be made orthogonal to the transport layer 4 and the transport layer 7
  • the transport layer 2 is orthogonal to the transport layer 5 and the transport layer 8
  • the transport layer 3 is orthogonal to the transport layer 6.
  • the beam superposition coefficients of the at least one second type of transmission layer are set according to the beam superposition coefficients of the first type of transmission layer, and the positive and negative beam superposition coefficients of the at least one second type of transmission layer are set. Sex changes.
  • the transmitting end device does not need to report the wideband superposition coefficient and the narrowband superposition coefficient of the beam of each transmission layer, and only needs to report the transmission layer 1 and the transmission layer 2, and the broadband superposition of the beam of the transmission layer 3
  • the coefficient and the narrowband superposition coefficient may be, and the receiving end device performs mapping processing according to the beam information of the multiple beams and the narrowband superposition coefficient of the partial transmission layer, so that the narrowband superposition coefficient or the broadband superposition coefficient of all the transmission layers can be obtained, thereby saving feedback Overhead.
  • the beam reference information of the Km layer transport layer sent by the sending end device includes location information of the strongest beam in each of the L m beams in each of the transport layers of the Km layer transport layer.
  • the receiving device assigns the strongest beam corresponding element in the starting vector to the element corresponding to the strongest beam in the target vector; for the element other than the corresponding element of the starting vector with the strongest beam in the starting vector, according to the positional relationship
  • the one-to-one correspondence principle, or according to the principle of random assignment assigns it to elements other than the element corresponding to the strongest beam in the target vector.
  • the receiving end device assigns the most strong beam corresponding element in the starting vector to the element corresponding to the strongest beam in the target vector; assigns the corresponding element of the second strong beam in the starting vector to the target vector.
  • the element corresponding to the strong beam; the other elements are assigned according to the principle of one-to-one correspondence of positional relationships, or according to the principle of random assignment.
  • the beams need not be ranked according to strength and strength, only the strongest beam needs to be focused, and then the elements corresponding to the strongest beam in the starting vector are assigned to the elements corresponding to the strongest beam in the target vector.
  • the elements corresponding to other beams in the starting vector are randomly assigned or the elements corresponding to other beams in the target vector may be given according to the principle of one-to-one correspondence of positional relationships.
  • the transmitting end device does not need to report the wideband superposition coefficient and the narrowband superposition coefficient information of the beam of each transmission layer, and the receiving end device performs mapping processing according to the beam information and the broadband and narrowband beam superposition coefficients of the partial transmission layer.
  • the wideband and narrowband beam superposition coefficients of all transmission layers can be obtained, thereby obtaining the broadband and narrowband superposition coefficients of each element of the precoding codebook, thereby saving feedback overhead and ensuring the y-stream and m-layer transmission of the Km layer transmission layer.
  • the xth layer of transport layers in the layer are orthogonal.
  • the mapping processing manner of the narrowband phase coefficient of each element in the precoding codebook is: the receiving end device takes the narrowband phase coefficient vector of the first polarization direction of the xth transmission layer in the m layer transmission layer a start vector; a narrowband phase coefficient vector of a second polarization direction of the yth transmission layer in the Km layer transport layer is used as a target vector;
  • the narrow-band phase coefficient vector of the direction is used as the target vector.
  • the receiving end device assigns the fth element of the first polarization direction of the narrowband phase coefficient vector of the xth transmission layer in the m layer transmission layer to the narrow band of the yth transmission layer in the Km layer transmission layer
  • the fth element of the first polarization direction of the phase coefficient vector after multiplying the fth element of the second polarization direction of the narrowband phase coefficient vector of the xth transmission layer of the m layer transmission layer by -1, The fth element of the second polarization direction assigned to the narrowband phase coefficient vector of the yth transmission layer of the Km layer transmission layer.
  • the first way is: the broadband and narrowband coefficient vectors of the third transmission layer are determined by the first transmission layer; the broadband and narrowband coefficient vectors of the fourth transmission layer are determined by the second transmission layer;
  • the second way is: the broadband and narrowband coefficient vectors of the third transmission layer are determined by the second transmission layer; the broadband and narrowband coefficient vectors of the fourth transmission layer are determined by the first transmission layer;
  • the elements in the starting vector other than the corresponding elements of the strongest beam of the starting vector are assigned to the target vector in addition to the elements corresponding to the strongest beam according to the principle of one-to-one correspondence of positional relationships or according to the principle of random assignment.
  • mapping For narrowband phase coefficient vectors, the mapping is:
  • the narrowband phase coefficient vector of the third transmission layer, the fth element of the first polarization direction is the same as the fth element of the first polarization direction of the narrowband phase coefficient vector of the first transmission layer;
  • the narrowband phase coefficient vector of the transmission layer, the fth element of the second polarization direction is equal to the fth element of the second polarization direction of the narrowband phase coefficient vector of the first transmission layer multiplied by -1.
  • the narrowband phase coefficient vector of the fourth transmission layer, the fth element of the first polarization direction is the same as the fth element of the first polarization direction of the narrowband phase coefficient vector of the second transmission layer;
  • the narrowband phase coefficient vector of the transmission layer, the fth element of the second polarization direction is equal to the fth element of the second polarization direction of the narrowband phase coefficient vector of the second transmission layer multiplied by -1.
  • the first way is: the broadband and narrowband coefficient vectors of the third transmission layer are determined by the first transmission layer; the broadband and narrowband coefficient vectors of the fourth transmission layer are determined by the second transmission layer;
  • the second way is: the broadband and narrowband coefficient vectors of the third transmission layer are determined by the second transmission layer; the broadband and narrowband coefficient vectors of the fourth transmission layer are determined by the first transmission layer;
  • the mapping relationship in the second embodiment is: the replacement relationship between the start vector and the target vector is to sequentially assign the element corresponding to the t-th strong beam in the start vector to the t-th strong in the target vector. The corresponding element of the beam.
  • the element corresponding to the third strong beam of the first transport layer is assigned to the element corresponding to the third strong beam in the third transport layer;
  • the first of the first transport layer is The element corresponding to the strong beam is assigned to the element corresponding to the first strong beam in the third transport layer;
  • the element corresponding to the fourth strong beam of the first transport layer is assigned to the fourth strongest in the third transport layer
  • an element corresponding to the second strong beam of the first transport layer is assigned to an element corresponding to the second strong beam of the third transport layer;
  • mapping relationship is (not shown):
  • the narrowband phase coefficient vector of the third transmission layer, the fth element of the first polarization direction is the same as the fth element of the first polarization direction of the narrowband phase coefficient vector of the first transmission layer;
  • the narrowband phase coefficient vector of the transmission layer, the fth element of the second polarization direction is equal to the fth element of the second polarization direction of the narrowband phase coefficient vector of the first transmission layer multiplied by -1.
  • the narrowband phase coefficient vector of the fourth transmission layer, the fth element of the first polarization direction is the same as the fth element of the first polarization direction of the narrowband phase coefficient vector of the second transmission layer;
  • the narrowband phase coefficient vector of the transmission layer, the fth element of the second polarization direction is equal to the fth element of the second polarization direction of the narrowband phase coefficient vector of the second transmission layer multiplied by -1.
  • the first way is: the narrowband coefficient vector of the third transmission layer is determined by the first transmission layer; the narrowband coefficient vector of the fourth transmission layer is determined by the second transmission layer;
  • the second way is: the narrowband coefficient vector of the fourth transmission layer is determined by the first transmission layer; the narrowband coefficient vector of the third transmission layer is determined by the second transmission layer;
  • the mapping relationship is: assigning the strongest beam corresponding element in the starting vector to the element corresponding to the strongest beam in the target vector; assigning the most powerful beam corresponding element in the starting vector to the target element
  • the target vector starting vector is the strongest beam corresponding element; for the elements other than the starting element of the strongest beam in the starting vector, according to the principle of one-to-one correspondence of positional relations, or according to the principle of random assignment, assign it to An element other than the element corresponding to the strongest beam in the target vector.
  • the channel state information feedback method provided by the embodiment of the present application is described in the above, with reference to FIG. 1 to FIG. 5 . It should be understood that the steps or operations shown in the methods of the foregoing various embodiments may be used as an example only. Perform other operations or deformations of various operations. Also, in the specific implementation, the various steps may be performed in a different order than that described in the embodiments of the present application, and may not perform all the operations or steps shown in the embodiments of the present application. Alternatively, it is also possible to perform more of the operations or steps shown in the various embodiments of the present application.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be implemented in the present application.
  • the implementation of the examples constitutes any limitation.
  • the codebook indication information generated by the transmitting end device and sent to the receiving end device includes the codebook indication information of the K layer transport layer; the K is greater than or equal to 2;
  • the codebook indication information includes beam information of the K layer transmission layer, beam superposition coefficient information of the m layer transmission layer, and beam reference information of the Km layer transmission layer; where 0 ⁇ m ⁇ K.
  • the receiving end device can receive and generate a precoding vector of each layer in the K layer transmission layer according to the foregoing codebook indication information.
  • the foregoing transmitting device may be an access device, such as a base station, or a terminal device; the receiving device may be a terminal device or an access device, such as a base station.
  • the beam information may include information of multiple beams used to construct a precoding vector of each transport layer, such as a beam index of each beam.
  • the beam superposition coefficient information of the m layer transport layer may include a set of beam superposition coefficients of each of the plurality of beams used to construct a precoding vector of each of the m layer transport layers. And including at least one of the following: a wideband superposition coefficient and a narrowband superposition coefficient, wherein the wideband superposition coefficient may include a wideband amplitude coefficient, and the narrowband superposition coefficient may include at least one of a narrowband amplitude coefficient and a narrowband phase coefficient.
  • the beam reference information of the Km layer transport layer may include strength indicator information of the foregoing multiple beams used to construct a precoding vector of each transport layer in the Km layer transport layer, such as, but not limited to, the foregoing The intensity ranking information of each beam in the beams, or the information indicating the strongest beam, or the information indicating the strongest at least two beams and the strong ordering information of the at least two beams.
  • each transport layer in the Km layer transport layer when the receiving end device generates the precoding vector corresponding to the transport layer, in addition to applying the beam reference information, reference may also be made to the layer in the m layer transport layer.
  • Beam superposition coefficient information For example, for the transport layer a in the above-described K-m layer transport layer, beam superposition coefficient information of the transport layer b in the above m-layer transport layer can be applied.
  • each of the plurality of beams of the precoding vector used to construct the transmission layer a may be determined according to the intensity of the beam in the plurality of beams, and determined in the multiple beams corresponding to the transmission layer b.
  • the beam superposition coefficient of the determined beam may be used as the beam superposition coefficient of each of the above beams of the transmission layer a, and the beam of each of the above beams of the transmission layer a obtained by the above manner may also be adjusted.
  • the positive and negative of the narrow-band phase coefficient in the superposition coefficient, that is, the narrow-band phase coefficient is inverted. In this way, the precoding vector of the transport layer a can be orthogonal to the precoding vector of the transport layer b.
  • the beam superposition coefficient of the strongest one or more beams of the transmission layer a may be set according to the beam superposition coefficient of the strongest one or more beams of the transmission layer b according to the above method, instead of The beam superposition coefficients of the respective beams of the transmission layer b correspondingly set the beam superposition coefficients of the respective beams of the transmission layer a. Further, for the other beams other than the strongest one or more beams, beam superposition coefficients adapted to the intensities of the beams, such as default beam superposition coefficients, may be set, thereby eliminating the need to correspond to the transmission layer b. The beam superposition coefficients of the intensity beams are used to set the beam superposition coefficients of the other beams described above.
  • the plurality of beams simultaneously act on two polarization directions, wherein the upper left corner and the lower right corner of the block diagonal matrix W 1 are respectively constructed by the same set of beams b 0 -b 3 .
  • the transmission layer b is also required.
  • the beam superposition coefficient in one polarization direction of the beam superposition coefficients of the beam is set to the beam superposition coefficient in the other polarization direction of the corresponding beam of the transmission layer a, and the narrowband phase coefficient is further inverted, and
  • the beam superposition coefficient in the other polarization direction of the beam superposition coefficients of the beam of the transmission layer b is set to the beam superposition coefficient in one polarization direction of the corresponding beam of the transmission layer a without negating the narrow band phase coefficient.
  • the beam superposition coefficient of the beam b 0 of the transmission layer a is set correspondingly according to the beam superposition coefficient of the beam b 1 of the transmission layer b
  • the beam superposition coefficient p 1 c 1 of the secondary strong beam b 1 in the transmission layer b in one polarization direction should be used as the beam superposition coefficient in the other polarization direction of the beam b 0 of the transmission layer a, similarly, transmission
  • the beam superposition coefficient p 5 c 5 of the sub-strong beam in layer b should be the beam superposition coefficient in the
  • the beam superposition coefficient p 1 c 1 of the secondary strong beam b 1 in the transmission layer b in one polarization direction is used as the beam superposition coefficient in the other polarization direction of the secondary strong beam b 0 of the transmission layer a
  • the narrowband phase coefficient may be further inverted, and the beam superposition coefficient p 5 c 5 of the second strong beam b 1 in the transmission layer b in the other polarization direction is used as the secondary strong beam b 0 of the transmission layer a.
  • the pre-preparation for constructing the transport layer may be
  • the above plurality of beams of the coding vector apply beam-superimposing coefficients adapted to the intensities of these beams (obtained from the beam reference information), thereby eliminating the need to refer to the beam superposition coefficient information of the above m-layer transmission layer.
  • These beam superposition coefficients may reflect the strength or contribution of the respective beams in the process of constructing the precoding vectors described above, in other words these beam superposition coefficients correspond to the strength or contribution of the corresponding beams in the construction of the precoding vectors described above.
  • the sending end device of the present application may be a terminal, and the receiving end device may be a network device.
  • the terminal 500 provided by the embodiment of the present application includes at least a processor 504 and a transceiver 508.
  • the processor 504 is configured to generate codebook indication information of the K layer transmission layer, where the K is greater than or equal to 2; the codebook indication information includes beam information of a K layer transmission layer, beam superposition coefficient information of the m layer transmission layer, and Reference information of the Km layer transport layer; where 0 ⁇ m ⁇ K;
  • the transceiver 508 is configured to send codebook indication information of the K layer transport layer generated by the processor;
  • the beam superposition coefficient information of the m layer transmission layer includes: a narrow band superposition coefficient of the m layer transmission layer, or further, according to the codebook design, a broadband superposition coefficient may further be included.
  • the beam reference information of the K-m layer transport layer includes: a beam strength ordering indication of each layer of the transport layer or a strongest beam indicator of each layer of the transport layer.
  • the above transceiver 508 can be used to perform the actions of the terminal to transmit or transmit to the network device described in the foregoing method embodiments, and the processor 504 can be used to perform the actions implemented by the terminal as described in the foregoing method embodiments.
  • the processor 504 can be used to perform the actions implemented by the terminal as described in the foregoing method embodiments.
  • the terminal can also include a memory 519 that stores computer-executed instructions; the processor 504 and the memory 519 can be integrated into a processing device, and the processor 504 can execute the program code stored in the memory 519 to implement the functions described above.
  • the memory 519 can also be integrated in the processor 504 when implemented.
  • the terminal may further include a power source 512 for providing power to various devices or circuits in the terminal.
  • the terminal may include an antenna 510 for transmitting uplink data or uplink control signaling output by the transceiver 508 through the wireless signal.
  • the terminal may further include one or more of an input unit 514, a display unit 516, an audio circuit 518, a camera 520, a sensor 522, and the like, and the audio circuit may further include Speaker 5182, microphone 5184, and the like.
  • the network device provided by the embodiment of the present application includes at least a processor 604 and a transceiver 608.
  • the transceiver 608 is used for codebook indication information of a K layer transmission layer; the K is greater than or equal to 2; the codebook indication information includes beam information of a K layer transmission layer, and beam superposition coefficient information of an m layer transmission layer, And beam reference information of the Km layer transmission layer; wherein 0 ⁇ m ⁇ K;
  • the processor 604 is configured to determine, according to beam information of the K layer transmission layer, beam superposition coefficient information of the m layer transmission layer, a precoding vector of the m layer transmission layer;
  • the receiving end device determines a precoding vector of the K-m layer transport layer according to the precoding vector of the m layer transport layer and the beam reference information of the K-m layer transport layer.
  • the network device may further include a memory 603, configured to save codebook indication information received by the transceiver 608 or save a precoding vector processed by the processor 604;
  • the processor 604 and the memory 603 may be combined to form a processing device, and the processor 604 is configured to execute the program code stored in the memory 603 to implement the above functions.
  • the memory 603 can also be integrated in the processor 604 when implemented.
  • the beam superposition coefficient information of the m-layer transmission layer sent by the transceiver 608 includes a narrow-band superposition coefficient of the m-layer transmission layer or a broadband superposition coefficient further including an m-layer transmission layer.
  • the broadband superposition coefficient includes: a wideband amplitude coefficient; the narrowband superposition coefficient includes: a narrowband amplitude coefficient and a narrowband phase coefficient.
  • the beam reference information of the Km layer transmission layer includes: a beam strength ordering indication of each layer of the transmission layer or a strongest beam indication of each layer of the transmission layer, where the strongest beam indication may be the strongest beam in all beams. location information.
  • the processor 604 determines a precoding vector of the m layer transport layer according to beam information of the K layer transport layer and a narrowband superposition coefficient of the m layer transport layer;
  • the processor 604 determines a precoding vector of the m layer transport layer according to beam information of the K layer transport layer, and a narrowband superposition coefficient and a broadband superposition coefficient of the m layer transport layer.
  • the processor 604 is further configured to determine a precoding vector of the K-m layer transport layer according to the precoding vector of the m layer transport layer and the beam reference information of the K-m layer transport layer. Specifically, the processor 604 maps the broadband superposition coefficient or the narrowband superposition coefficient of the beam of the m layer transmission layer to the foregoing according to the mapping rule and the beam reference information of the Km layer transmission layer except the m layer transmission layer. Broadband superposition coefficient or narrowband superposition coefficient of the beam in the Km layer transmission layer.
  • the processor 604 sets a wideband amplitude coefficient or a narrowband amplitude coefficient of a first polarization direction of the xth transmission layer in the m layer transmission layer. a vector as a starting vector; a wideband amplitude coefficient or a narrowband amplitude coefficient vector of a second polarization direction of the yth transmission layer in the Km layer transmission layer is used as a target vector;
  • a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a second polarization direction of the xth transmission layer in the m layer transmission layer is used as a starting vector;
  • a broadband amplitude coefficient or a narrowband amplitude coefficient vector of a first polarization direction of the yth transmission layer in the transmission layer is used as a target vector.
  • An element corresponding to the t-th strong beam in the start vector is assigned to a corresponding element of the t-th strong beam in the target vector.
  • the element corresponding to the strongest beam in the starting vector is assigned to the element corresponding to the strongest beam in the target vector; and the first in the starting vector except the corresponding element of the strongest beam
  • the f elements are assigned to the fth element of the target vector except the corresponding element of the strongest beam, where 0 ⁇ f ⁇ L.
  • the processor 604 uses a narrowband phase coefficient vector of a first polarization direction of the xth transmission layer in the m layer transmission layer as a start vector; and the Km layer in the transport layer a narrowband phase coefficient vector of the second polarization direction of the yth transmission layer as a target vector;
  • the narrowband phase coefficient vector of the polarization direction is used as the target vector.
  • the processor 604 assigns the fth element of the first polarization direction of the narrowband phase coefficient vector in the start vector to the first polarization direction of the narrowband phase coefficient vector in the target vector. a f-th element; after multiplying the f-th element of the second polarization direction of the narrow-band phase coefficient vector in the start vector by -1, assigning to the second of the narrow-band phase coefficient vectors in the target vector The fth element of the polarization direction.
  • the network device may further include an antenna 610, configured to send downlink data or downlink control signaling output by the transceiver 608 by using a wireless signal.
  • the processor 504 of the terminal and the processor 604 of the network device may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and an NP.
  • the processor may further include a hardware chip.
  • the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL) or any combination.
  • the memory 12 of the terminal and the memory 22 of the network device may include a volatile memory, such as a random access memory (RAM), and may also include a non-volatile memory.
  • a volatile memory such as a random access memory (RAM)
  • RAM random access memory
  • non-volatile memory such as a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); the memory may further include a combination of the above types of memories.
  • the network device in the embodiment of the present application may correspond to the network device in the method embodiment of the present application
  • the terminal may correspond to the terminal in the method embodiment of the present application.
  • the above-mentioned and other operations and/or functions of the respective modules of the network device and the terminal are respectively implemented in order to implement the corresponding processes of the foregoing method embodiments.
  • the description of the method embodiments of the present application may be applied to the device embodiment, and Let me repeat.
  • the K-layer transmission layer codebook indication information is sent by the source device, where the codebook indication information only includes beam index information of multiple beams and narrowband superposition coefficients of a part of the transmission layer, and The wideband superposition coefficient and the narrowband superposition coefficient of each order beam are not reported, and the receiving end device performs mapping processing according to the beam index information of the multiple beams and the narrowband superposition coefficient of the partial transmission layer, and then obtains all the transmission layers.
  • the narrowband superposition coefficient if there is a broadband superposition coefficient, can also obtain the broadband superposition coefficient of all transmission layers through mapping processing. Therefore, implementing the feedback technology of the channel state information provided by the present application can improve the transmission quality and save the system. Feedback overhead.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

Abstract

La présente invention concerne un procédé de réception et de rétroaction d'informations d'état de canal et un dispositif. Le procédé comprend les étapes suivantes : un dispositif de transmission génère des informations d'indication de livre de codes de K couches de transport, K étant supérieur ou égal à 2, et les informations d'indication de livre de codes comprenant des informations de faisceau de K couches de transport, des informations de coefficient de superposition de faisceau de m couches de transport, et des informations de référence de faisceau de K-m couches de transport, où 0<m<K ; un dispositif de réception détermine des vecteurs de précodage de m couches de transport conformément aux informations de faisceau des K couches de transport et aux informations de coefficient de superposition de faisceau des m couches de transport ; et le dispositif de réception détermine des vecteurs de précodage de K-m couches de transport conformément aux vecteurs de précodage des m couches de transport et aux informations de référence de faisceau des K-m couches de transport. En mettant en œuvre la technologie de réception et de rétroaction d'informations d'état de canal fournie par la présente invention, la qualité de transmission peut être améliorée, et le surdébit de rétroaction de système peut être économisé.
PCT/CN2018/090243 2017-06-16 2018-06-07 Procédé de réception et de rétroaction d'informations d'état de canal, dispositif de réception et dispositif de transmission WO2018228266A1 (fr)

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CN111756417B (zh) * 2019-03-27 2021-05-11 电信科学技术研究院有限公司 一种信道状态信息反馈方法及装置
CN110754054B (zh) * 2019-05-12 2021-01-08 Oppo广东移动通信有限公司 一种信道状态信息传输方法、设备及存储介质
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