WO2018127151A1 - Procédé, appareil et système d'instruction de matrice de précodage - Google Patents

Procédé, appareil et système d'instruction de matrice de précodage Download PDF

Info

Publication number
WO2018127151A1
WO2018127151A1 PCT/CN2018/071641 CN2018071641W WO2018127151A1 WO 2018127151 A1 WO2018127151 A1 WO 2018127151A1 CN 2018071641 W CN2018071641 W CN 2018071641W WO 2018127151 A1 WO2018127151 A1 WO 2018127151A1
Authority
WO
WIPO (PCT)
Prior art keywords
indication
wireless communication
communication device
precoding matrix
codebook
Prior art date
Application number
PCT/CN2018/071641
Other languages
English (en)
Chinese (zh)
Inventor
黄逸
任海豹
李元杰
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2018127151A1 publication Critical patent/WO2018127151A1/fr

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
    • 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

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a precoding matrix indication method, apparatus, and system in a wireless communication system.
  • Massive Multiple Input Multiple Output (Massive MIMO) technology can utilize more spatial freedom to further increase system capacity. It is a new generation of wireless access technology (New Radio Access Technology, One of the key technologies in NR).
  • a radio base station device in an NR system may be referred to as a Transmit Receive Point (TRP) or a gNB.
  • TRP Transmit Receive Point
  • the NR usually configures a large-scale antenna.
  • the user equipment User Equipment, UE
  • the antennas configured on the user equipment in the NR may be distributed on multiple antenna panels, which makes the UE more suitable for multi-stream.
  • the transmitted scene improves the performance of the uplink transmission. As shown in FIG.
  • the user equipment is configured with two antenna panels, namely an antenna panel 1 and an antenna panel 2 .
  • the antenna panel 2 is configured with multiple antenna arrays, wherein each “X” can be understood as It is an antenna vibrator, "X” also indicates different polarization directions, "X” usually corresponds to two antenna ports, and a single-polarized antenna is usually not represented by X.
  • the antenna panel 1 can be similarly configured with multiple antenna arrays, which will not be described herein for brevity.
  • the Precoding Matrix Indicator (PMI) information required for the precoding by the UE may be obtained by using Downlink Control Information (DCI) sent by the TRP, or by the reciprocity of the uplink and downlink channels.
  • DCI Downlink Control Information
  • the manner in which the UE obtains the precoding matrix indication required for precoding can be classified into three types:
  • the TRP performs uplink channel estimation according to the uplink sounding reference signal (SRS), and determines the PMI corresponding to the UE precoding matrix in the preset codebook according to the estimated situation, and uses the signaling message to The PMI is sent to the UE.
  • SRS uplink sounding reference signal
  • the UE presets some precoding matrix transmission reference signals (such as SRS), and the base station selects one of the precoding matrices according to the received signal strength and indicates to the UE.
  • precoding matrix transmission reference signals such as SRS
  • the UE performs channel estimation according to a Channel State Information Reference Signal (CSI-RS), and calculates an uplink precoding matrix according to the reciprocity of the uplink and downlink channels.
  • CSI-RS Channel State Information Reference Signal
  • the TRP can perform centralized processing on channel information of multiple UEs, thereby achieving the most when selecting the precoding matrix. Excellent choice. Therefore, the scheme can reduce interference between uplink UEs and has better robustness.
  • the TRP can also indicate information such as the transmission rank (the number of transmitted data layers) and the channel quality indicator (CQI) of the UE, as a reference for the uplink data transmission of the UE.
  • each precoding matrix in the codebook corresponds to one or more Precoding matrix index
  • the precoding matrix index has a corresponding relationship with the corresponding PMI.
  • the codebook is usually pre-defined, and the corresponding codebook is stored on the TRP end and the UE end, and the correspondence between each precoding matrix, precoding matrix index and PMI in the codebook stored at both ends is agreed. Understanding is consistent.
  • the physical layer signaling can notify the UE that the UE can determine a specific precoding matrix according to the signaling sent by the TRP.
  • the Long Term Evolution (LTE) system introduces an uplink codebook in Release 10 (Release 10).
  • the network side indicates the domain by using Precoding Information and Number of Layers in DCI format 4.
  • the UE is informed of the precoding matrix information used for uplink data transmission.
  • the relationship between the indication domain information and the number of layers and PMI is as shown in Table 1:
  • transmit uplink precoding matrix indication information corresponds to the codebook index in Table 2 below:
  • the codebook with rank 1 is composed of a combination of Discrete Fourier Transform (DFT) vector and antenna selection vector, and the codebook with rank 2 is an identity matrix.
  • DFT Discrete Fourier Transform
  • the codebook with Rank 1 is composed of 16 Glassman constant modulus vector and 8 antenna selection vector, and Rank is 2 codebooks by 8cross product vector (for CLA array) and 8 antenna selection vectors (for non-CLA arrays) are combined, and a codebook with a Rank of 3 consists of 12 antenna selection vectors (the first stream selects two of the four antennas, and the other two streams correspond to one antenna, respectively. This method will cause the power imbalance between streams, which affects performance to some extent.
  • the codebook with a Rank of 4 is an identity matrix.
  • the NR uplink can support Orthogonal Frequency Division Multiplexing (OFDM), which makes the NR system's constant model requirement for the precoding matrix can be reduced, so that the existing codebook design is not flexible enough, that is, The original codebook design did not consider antenna correlation, performance was poor, and it could not support dual-polarized antennas.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the NR uplink support multi-carrier system may support more than 100M bandwidth, and there is a frequency selective fading problem.
  • the transmission PMI indication in the DCI is full bandwidth indication information, and thus cannot satisfy the NR data transmission. Demand.
  • Some precoded pre-synchronized SRS ports may be blocked. For example, in an uplink co-frequency multi-connection scenario, some panels of the UE may be blocked.
  • the uplink can support non-precoded sounding reference signals (non-precoded SRS) and precoded sounding reference signals (precoded SRS), while the existing uplink codebook cannot support precoded SRS.
  • non-precoded SRS non-precoded sounding reference signals
  • precoded SRS precoded sounding reference signals
  • the class B (CLASS B) codebook mainly supports a dual-polarized base station-end regular antenna array, but the antenna structure configuration of the UE is flexible.
  • the present application describes a precoding matrix indication method, apparatus and system.
  • a first level codebook is used to indicate a beam by using a two-stage codebook structure in combination with a hierarchical precoding matrix indication.
  • the second-level codebook is used to indicate the phase difference information, so as to improve uplink MIMO transmission performance in a scenario where multiple antennas are configured on the UE side. For example, reducing the overhead of the PMI indication in the prior art also ensures the availability of the codebook even after some SRS ports are occluded, for example, in a high-rank scenario.
  • a first aspect of the embodiments of the present invention provides a precoding matrix indication method, including:
  • the first wireless communication device acquires a first indication and a second indication from the second wireless communication device, the first indication being used to instruct the first wireless communication device to perform wireless transmission to the second wireless communication device a first precoding matrix, the second indication being used to instruct the first wireless communications device to perform a second precoding matrix used for wireless transmission to the second wireless communications device;
  • the first precoding matrix comprises The first wireless communication device performs wireless transmission of information of a used beam to the second wireless communication device, the first precoding matrix being attributed to the first wireless communication device performing to the second wireless a first codebook used by the communication device for wireless transmission;
  • the second precoding matrix includes information of a phase difference used by the first wireless communication device, the second precoding matrix being attributed to the first
  • the wireless communication device performs a second codebook used for wireless transmission to the second wireless communication device.
  • the first-level codebook is used to indicate beam information
  • the second-stage codebook is used to indicate phase difference information, so as to improve uplink MIMO transmission in a scenario where multiple antennas are configured on the UE side. performance.
  • the precoding vector included in each precoding matrix in the first codebook is a discrete Fourier transform vector, or a precoding vector included in each precoding matrix in the first codebook. Corresponding to at least one wide beam or at least one narrow beam.
  • a part of the elements of the at least one precoding vector in the first codebook is 0; another part of the precoding vectors is a discrete Fourier transform vector, or the other part of the element It is a precoding vector based on Glassman packing theory.
  • the discrete Fourier transform vector is designed to:
  • N is the number of antenna ports of the sounding reference signal
  • O is an integer greater than or equal to 1, indicating an oversampling factor
  • m is the number of the vector
  • corresponding codebook index ⁇ is the pi
  • e is the natural constant
  • j is the imaginary unit.
  • [ ⁇ ] T represents the conjugate transpose operation.
  • the first indication and the second indication are included in physical layer signaling from the second wireless communication device, where the physical layer signaling includes a first indication field and a a second indication field, the first indication field comprising the first indication, and the second indication field comprising the second indication.
  • the first indication and the second indication are included in physical layer signaling from the second wireless communication device, the physical layer signaling includes an indication domain, An indication field includes the first indication and the second indication.
  • the first indication and the second indication are included in high layer signaling from the second wireless communications apparatus, where the high layer signaling includes a first indication field and a second indication a domain, the first indication field includes the first indication, and the second indication field includes the second indication.
  • the first indication and the second indication are included in high layer signaling from the second wireless communication device, the high layer signaling includes an indication field, the one indication The domain includes the first indication and the second indication.
  • the first wireless communication device acquires the first indication and the second indication from the second wireless communication device, including: the first indication is included in the second wireless communication device In the first signaling, the first wireless communication device receives second signaling from the second wireless communication device, and the second signaling includes when the second indication is used in a data channel And the information of the frequency resource, the first wireless communication device demodulating and obtaining the second indication according to the information of the time-frequency resource included in the second signaling.
  • the embodiment of the present application proposes a two-level codebook structure for uplink transmission, and the two-level codebook structure can be used in combination with a hierarchical PMI indication mechanism, and the two-level codebook is used.
  • u i and u′ i may be the same or different structured precoding vectors
  • Indicates a co-phasing factor which may be polarization phase information or phase difference information of a dual-polarized antenna.
  • the two-level codebook involved in the embodiment of the present invention is two mutually independent codebooks, and the first PMI corresponding to the beam selection and the second PMI corresponding to the cophsing selection, but the LTE is compared with the config 1 codebook in the LTE Release 13.
  • the two PMIs in Release 13 jointly determine a matrix, which is not flexible enough; and config 1/2/3/4 requires high-level parameter configuration, signaling overhead is relatively large, and there is no performance gain.
  • the first codebook is designed as:
  • the second codebook is designed to:
  • Codebook index The number of transmission layers is 1
  • T represents a matrix transpose
  • 1, -1, +j, -j are quadrature amplitude modulation character sets.
  • the first codebook and the second codebook are designed as:
  • P represents a factor that normalizes the precoding vector power in the codebook.
  • the phase difference information includes information of a phase difference of a cross-polarized antenna, or information of a phase difference between a plurality of beams.
  • the first codebook and the second codebook are pre-configured in the first wireless communication device and/or the second wireless communication device.
  • the wide beam is an analog beam, or a beam corresponding to an antenna virtualization weight, or a beam formed when the number of antenna ports/the number of antenna elements is small; the narrow beam is a number Simulate the beam formed by the mixture of weights, or the beam formed by digital weights.
  • a second aspect of the embodiments of the present invention provides a first wireless communications apparatus, including: at least one processor, a memory, a transceiver, and a bus system, the processor, the memory, and the transceiver coupled by a bus system, the A wireless communication device is in communication with the second wireless communication device through the transceiver, the memory for storing program instructions, the at least one processor for executing the program instructions stored in the memory, such that the A wireless communication device performs the portion of the first wireless communication device that is executed in a possible design of any of the precoding matrix indicating methods in accordance with the first aspect of the present invention.
  • the first wireless communication device can be a terminal device.
  • a third aspect of the embodiments of the present invention provides a second wireless communications apparatus, including: at least one processor, a memory, a transceiver, and a bus system, the processor, the memory, the transceiver coupled by a bus system, the a wireless communication device communicating with the first wireless communication device via the transceiver, the memory for storing program instructions, the at least one processor for executing the program instructions stored in the memory, such that the The second wireless communication device performs the portion of the second wireless communication device that is executed in a possible design of the precoding matrix indicating method according to any of the first aspects of the present invention.
  • the second wireless communication device can be a wireless access network device.
  • a fourth aspect of the embodiments of the present invention provides a system chip, which is applied to a first wireless communication device, where the system chip includes:
  • At least one processor a memory, a communication interface, and a bus system
  • said processor, said memory, said transceiver being coupled by a bus system
  • said communication interface being for said system chip and said first wireless communication device Communication
  • the memory for storing program instructions
  • the at least one processor for executing the program instructions stored in the memory, such that the first wireless communication device completes any of the first aspects of the embodiments of the present invention
  • the precoding matrix indicates the portion of the method that the first wireless communication device performs in the possible design of the method.
  • a fifth aspect of the embodiments of the present invention provides a system chip, which is applied to a second wireless communication device, where the system chip includes:
  • At least one processor a memory, a communication interface, and a bus system
  • said processor, said memory, said transceiver being coupled by a bus system
  • said communication interface being for said system chip and said second wireless communication device Communication
  • the memory for storing program instructions
  • the at least one processor for executing the program instructions stored in the memory, such that the second wireless communication device completes any of the first aspects of the embodiments of the present invention
  • the precoding matrix indicates the portion of the method that the second wireless communication device performs in the possible design of the method.
  • a fifth aspect of the embodiments of the present invention provides a communication system, where the communication system includes a first wireless communication device according to a second aspect of the present invention, and a second wireless communication device provided by the third aspect of the embodiment of the present invention.
  • the first wireless communication device and the second wireless communication device cooperate to perform a possible design of the precoding matrix indication method of any of the first aspects of the embodiments of the present invention.
  • the precoding matrix indication method, apparatus, system, and the like provided by the embodiments of the present invention use a two-level codebook structure, combined with a hierarchical precoding matrix indication (for example, using a two-level PMI), and the first level codebook is used.
  • the second-stage codebook is used to indicate the phase difference information, thereby effectively improving the uplink MIMO transmission performance in the scenario where multiple antennas are configured on the UE side, for example, reducing the system overhead of the PMI indication in the prior art. This makes it possible to guarantee the availability of codebooks even after some SRS ports are occluded, such as in high-rank scenarios.
  • FIG. 1 is a schematic block diagram of a structure for configuring a multi-panel array antenna in a UE according to the present application
  • FIG. 2 is a schematic diagram of a possible application scenario according to an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of a method for indicating a precoding matrix according to an embodiment of the present disclosure
  • FIG. 4 is a schematic block diagram of a wireless communication apparatus according to an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a wireless communication apparatus according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a wireless communication apparatus according to an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a wireless communication apparatus according to an embodiment of the present application.
  • the network architecture and the service scenario described in the embodiments of the present application are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute a limitation of the technical solutions provided by the embodiments of the present application.
  • the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.
  • the techniques described in this application may be applicable to Long Term Evolution (LTE) systems and subsequent evolved systems such as the 5th Generation mobile communication (5G), etc., or other wireless communications that require precoding techniques.
  • the system is especially suitable for communication systems involving the application of precoding matrices.
  • FIG. 2 it is a schematic diagram of a possible application scenario of the present application.
  • the user equipment (201) accesses the network device through the wireless interface for communication, and can also communicate with another user equipment, such as a device to device (D2D) or a machine to machine (M2M) scenario. Communication.
  • the network device (202) can communicate with the user equipment or with another network device, such as a communication between the macro base station and the access point.
  • the terms "network” and "system” are often used interchangeably, but those skilled in the art can understand the meaning.
  • the user equipment referred to in the present application may include various handheld devices having wireless communication functions, in-vehicle devices, wearable devices, computing devices, control devices, or other processing devices connected to the wireless modem, and various forms of UE, mobile
  • the user equipment described in the present application may be movable or fixed at a certain location, such as a mobile station (MS), a terminal (Terminal), or a terminal equipment (Terminal Equipment). For convenience of description, they are collectively referred to as user equipment.
  • the network device (202) involved in the present application may be a radio access network device (such as a base station), a network controller, or a mobile switching center, and is not limited herein.
  • the device that directly communicates with the user equipment (201) through the wireless channel is usually a base station (202), and the base station (202) can be a macro base station, a micro base station, a relay station, an access point, or a radio remote.
  • a remote radio unit (RRU), etc. may be other network devices (202) having similar wireless communication functions for wireless communication with the user equipment (201), which is not limited in this application.
  • the name of the device (202) with base station function may be different, for example, in an LTE network, called an evolved NodeB (eNB or eNodeB), in the third generation (the 3rd Generation) In the 3G network, it is called a Node B. In a subsequent evolution system such as 5G, it can be called a Transmission Reception Point (TRP).
  • eNB evolved NodeB
  • TRP Transmission Reception Point
  • the technical solution provided by the present application can be applied between a radio access network device and a user equipment, for example, between a base station and a user equipment, and can also be applied to other communication devices that need to precode the transmission data, such as two.
  • the communication device with the wireless transmission function is described by taking the network device and the user device as an example in the embodiment of the present application.
  • the antenna port (Antenna Port) described in this application is generally used to transmit physical channels or signals.
  • the channel that the symbol transmitted on one antenna port experiences can pass through the channel experienced by other symbols transmitted on the same antenna port. Inferred to get.
  • Beam is an understanding of a radio wave formed in a certain direction and shape in space when a wireless signal is transmitted or received by at least one antenna port.
  • the beam may be formed by weighting the amplitude and/or phase of the data transmitted or received by the at least one antenna port, or may be formed by other methods, such as adjusting the relevant parameters of the antenna unit, and forming a beam.
  • the understanding of the beam may also be defined as a resource, which may include an antenna port, a time-frequency resource, or a beam number, and the like.
  • the understanding of the beam can also be understood from the physical meaning of the beam.
  • a beam is composed of one or more (logical) antennas, and the weight of each (logical) antenna is formed by the precoding matrix of the baseband or the phase shift of the radio frequency end. , called a beam.
  • the antenna panel (or simply “panel”) described in the present application refers to a device for carrying a physical antenna, and an antenna panel may carry an antenna array composed of multiple antenna units, or may be composed of multiple antenna panels. Multi-panel Antenna Array.
  • the matrix or precoding matrix described in the present application may also include a vector with a row number or a column number of 1.
  • An embodiment of the present invention provides a precoding matrix indication method, in a wireless communication system, a first wireless communication device receives a first indication and a second indication sent by a second wireless communication device, where the first indication is used to indicate the first a wireless communication device performing a first precoding matrix for wireless transmission to the second wireless communication device, the second indication for instructing the first wireless communication device to perform wireless transmission to the second wireless communication device a second precoding matrix; the first precoding matrix includes information that the first wireless communication device performs a beam used for wireless transmission to the second wireless communication device, the first precoding matrix being attributed to the first wireless communication The device performs a first codebook used for wireless transmission to the second wireless communication device; the second precoding matrix includes information of a phase difference used by the first wireless communication device, the second precoding matrix is attributed to The first wireless communication device performs a second codebook used for wireless transmission to the second wireless communication device.
  • the phase difference information may be information of a phase difference of the cross-polarized antenna, or the phase difference information may be information of
  • the first wireless communication device is a terminal device, usually a mobile terminal device
  • the second wireless communication device is a wireless access network device
  • the first wireless communication device performs the second wireless communication
  • the direction of wireless transmission of the device is the uplink transmission direction.
  • the precoding vector included in each precoding matrix in the first codebook is a discrete Fourier transform vector, or the precoding vector included in each precoding matrix in the first codebook corresponds to at least A wide beam or at least one narrow beam.
  • the wide beam may be an analog beam, or a beam corresponding to an antenna virtualization weight, or a beam formed when the number of antenna ports/the number of antenna elements is small;
  • the narrow beam may be a beam formed by a mixture of digital analog weights. Or a beam formed by digital weights.
  • a part of the elements of the at least one precoding vector in the first codebook is 0; another part of the precoding vector is a discrete Fourier transform vector, or the other part of the element is based on Grasse Precoding vector designed by Man Box Theory.
  • the discrete Fourier transform vector design can be:
  • N is the number of antenna ports of the sounding reference signal
  • O is an integer greater than or equal to 1, indicating an oversampling factor
  • m is the number of the vector
  • corresponding codebook index ⁇ is the pi
  • e is the natural constant
  • j is the imaginary unit.
  • [ ⁇ ] T represents the conjugate transpose operation.
  • the first indication and the second indication are included in physical layer signaling from the second wireless communication device, where the physical layer signaling includes a first indication domain and a second indication domain,
  • the first indication field includes the first indication, and the second indication field includes the second indication; or the first indication and the second indication are included in physical layer signaling from the second wireless communications device,
  • the physical layer signaling includes an indication field, the one indication field includes the first indication and the second indication; or the first indication and the second indication are included in high layer signaling from the second wireless communication device
  • the high-level signaling includes a first indication field and a second indication field, where the first indication field includes the first indication, the second indication field includes the second indication, or the first indication and the second indication
  • the high layer signaling included in the higher layer signaling from the second wireless communication device includes an indication field, the one indication field including the first indication and the second indication.
  • the first wireless communication device acquires the first indication and the second indication from the second wireless communication device, including: the first indication is included in the first from the second wireless communication device In the signaling, the first wireless communication device receives the second signaling from the second wireless communication device, where the second signaling includes the second information indicating the time-frequency resource used in the data channel, the A wireless communication device demodulates and obtains the second indication according to the information of the time-frequency resource included in the second signaling.
  • the embodiment of the present application proposes a two-level codebook structure for uplink transmission, and the two-level codebook structure can be used in combination with a hierarchical PMI indication mechanism, and the two-level codebook is used.
  • u i and u′ i may be the same or different structured precoding vectors, Indicates a co-phasing factor, which may be polarization phase information or phase difference information of a dual-polarized antenna.
  • the first codebook is designed as:
  • the second codebook is designed as:
  • Codebook index The number of transmission layers is 1 0 [1 1] T 1 [1 -1] T 2 [1 +j] T 3 [1 -j] T
  • T represents a matrix transpose
  • 1, -1, +j, -j are quadrature amplitude modulation character sets.
  • the first codebook and the second codebook are designed as:
  • P represents a factor that normalizes the precoding vector power in the codebook.
  • the first codebook and the second codebook may be pre-configured in the first wireless communication device and/or the second wireless communication device.
  • FIG. 3 is a schematic flowchart diagram of a precoding matrix indication method 300 according to an embodiment of the present disclosure.
  • This embodiment can be applied to a scenario in which a terminal device performs precoding transmission on the uplink, for example, in a scenario: when the number of transmission ports is greater than X (X can be a positive integer greater than 2), for using cyclic prefix-based OFDM (Cyclic Prefix)
  • X can be a positive integer greater than 2
  • CP OFD CP OFD waveform MIMO supports a frequency selective precoding is supported for UL MIMO with CP-OFDM waveform when the transmission ports is greater than X.
  • the terminal device sends an uplink reference signal to the radio access network device.
  • the terminal device sends an uplink reference signal to the radio access network device, so that the radio access network device is configured to perform channel measurement.
  • the uplink reference signal is an SRS
  • the radio access network device is a TRP
  • the terminal device is a UE.
  • the UE transmits an uplink reference signal for channel measurement
  • the TRP receives the uplink reference signal sent by the UE.
  • Channel estimation optionally, the TRP uses a preset codebook and a channel matrix to perform matching, and selects a corresponding precoding matrix according to the matching result, thereby determining a PMI corresponding to the precoding matrix.
  • the TRP indicates the precoding matrix to be used for the uplink transmission of the UE by using one or more downlink signaling after the UE selects the precoding matrix, and the UE performs uplink data transmission according to the precoding matrix indicated in the downlink signaling. In this way, in the case that the UE can support a large number of antennas, even if some UE antennas are blocked or damaged, the UE can also apply uplink precoding transmission in the foregoing scenario, thereby further improving transmission performance.
  • the TRP selects a precoding matrix to be used for the UE uplink transmission in the preset codebook.
  • a two-level codebook structure is proposed.
  • the first-level codebook includes beam selection vector information.
  • the pre-coding vector in the codebook may be a uniform beam uniformly distributed in a set of spaces.
  • the wide beam can be generally an analog beam or a beam corresponding to the antenna virtualization weight.
  • the DFT vector can be used:
  • N is the number of antenna ports of the SRS
  • O is an integer greater than or equal to 1
  • m is the number of the vector
  • ⁇ is the pi
  • e is the natural constant
  • j is the imaginary unit
  • [ ⁇ ] T indicates a conjugate transposition operation, which can be configured by the TRP to the UE through downlink signaling.
  • the UE uses a two-dimensional antenna array, that is, if the UE is configured with at least one antenna panel, another implementation manner of the first-level codebook is that the DFT vector can be utilized.
  • N1 represents the number of antenna ports in the vertical dimension
  • N2 represents the number of antenna ports in the horizontal dimension
  • O1 and O2 are integers greater than or equal to 1, respectively representing the oversampling factors of the vertical dimension and the horizontal dimension
  • m, l represents the number of the vector, corresponding to the first horizontal/vertical codebook index
  • ⁇ represents the pi
  • e represents the natural constant
  • j represents the imaginary unit.
  • the UE can be informed by the TRP through downlink signaling (such as high layer signaling or physical layer signaling).
  • the expression of the first level codebook may be as shown in the following Table 8:
  • u may be the aforementioned u m , representing the first codebook of the dual-polarized antenna, and the matrices on the two diagonals respectively represent the precoding matrix in the two polarization directions.
  • the above codebook may be the first codebook of the dual-polarized antenna, and the matrices on the two diagonals respectively represent precoding matrices in two polarization directions.
  • the second level codebook may include phase compensation factor information for the polarized antenna, and the element constituting the precoding matrix in the second level codebook may be e j ⁇ n/2 (where ⁇ represents a pi and e represents a natural constant , j denotes an imaginary unit, and n denotes a second codebook index), for example, a Quadrature Amplitude Modulation (QAM) character set ⁇ 1, -1, +j, -j ⁇ .
  • QAM Quadrature Amplitude Modulation
  • Second codebook index Number of transmission layers 1 0 [1 1] T 1 [1 -1] T 2 [1 +j] T 3 [1 -j] T ... ...
  • the above codebook may be a second codebook of a dual-polarized antenna, and two diagonal matrixes respectively represent phases in two polarization directions factor.
  • the first level codebook and the second level codebook may also be designed as the following table ten:
  • U may be u m representing the first codebook of the dual-polarized antenna, and the matrices on the two diagonals respectively represent precoding matrices in the two polarization directions.
  • the entire formula represents a precoding vector in a codebook that is jointly determined by the first codebook index and the second codebook index.
  • the format of the codebook is similar to the above table, except that the first codebook index becomes two values of m and l, and details are not described herein again.
  • Section 302 The radio access network device sends an indication to the terminal device to indicate that the user equipment uses the selected precoding matrix to transmit uplink data.
  • a radio access network device (such as a TRP) sends a first PMI and/or a second PMI to a terminal device, such as a UE.
  • the first PMI may correspond to any one of the foregoing first codebook indexes, where the first PMI may be a broadband PMI, and the radio access network device further sends a second PMI to the terminal device, where the second PMI is The PMI corresponds to the second codebook index, and the second PMI may be a subband PMI, which can better adapt to the uplink OFDM system for the subband level PMI.
  • the access network device may not indicate the second PMI to the terminal, and the terminal device may perform uplink transmission by using the received first PMI, using the uplink precoding matrix corresponding to the first PMI.
  • the terminal device may perform uplink transmission by using only the first level codebook. With this design, system compatibility can be made better.
  • the radio access network device may send the first PMI and/or the second PMI to the terminal device in different periods.
  • the radio access network device indicates, by the downlink signaling, the first PMI and the second PMI of the terminal device, where the downlink signaling may be physical layer signaling or higher layer signaling, when the signaling is physical layer signaling.
  • the signaling may be DCI.
  • the signaling may be Radio Resource Control (RRC) or a Media Access Control Control Element (MAC CE).
  • RRC Radio Resource Control
  • MAC CE Media Access Control Control Element
  • the radio access network device may send the first PMI to the terminal device by sending downlink signaling (such as a physical layer or a high layer signaling), and the radio access network device And signaling to the terminal device, the time-frequency resource used by the second PMI in the data channel, to notify the terminal device of the downlink signaling of the time-frequency resource where the second PMI is located, where the wireless access network device carries the first PMI
  • the signaling may also be separately sent by the radio access network device, as long as the information about the time-frequency resource used by the second PMI in the data channel can be carried in the downlink signaling.
  • the UE obtains the second PMI by demodulating on the indicated time-frequency resource.
  • the terminal device determines an uplink precoding matrix according to the first PMI and the second PMI, and performs uplink data transmission.
  • the technical effect of this is that, because the second PMI may occupy more resources, it may not be accommodated in signaling (such as DCI), and the scheme can save control signaling resources.
  • a plurality of feasible signaling structures for the downlink indication PMI are also provided.
  • the number of the antenna ports on the terminal device side may be two, four or eight. Wait.
  • an indication field in the physical layer control signaling may include a transmission layer number and PMI information, and the indication domain name may be, for example, precoding information and layer number.
  • precoding Information and Number of Layers a feasible implementation is as follows:
  • the PMI 1 shown in the table represents the first PMI
  • the PMI 2 represents the second PMI.
  • the technical meanings of the first PMI and the second PMI may refer to the foregoing embodiments of the present invention regarding the two-level codebook and the two-level PMI. A description of a viable design.
  • the signaling sent by the radio access network device is a physical layer control signaling, where two separate indication fields may be used to carry the transmission layer number and the PMI information, where The information used to indicate PMI information can carry two PMIs.
  • the examples are as follows:
  • the downlink signaling is physical layer control signaling
  • three separate indication fields may also be utilized, respectively indicating the number of transmission layers, the first PMI information and the second PMI information, for example, using the indication field “number of Layers" indicates the number of transport layers, the indication field "Precoding information 1" is used to indicate the first PMI information, and the indication field "Precoding information 2" is used to indicate the second PMI information.
  • the technical meanings of the first PMI and the second PMI can be referred to the description of various feasible designs of the two-stage codebook and the two-stage PMI in the foregoing embodiments of the present invention.
  • the high layer signaling is an RRC signaling or a MAC CE
  • an indication field in the high layer signaling is used. : "number of layers") to indicate the transport layer information
  • using an indication field in the physical layer control signaling to indicate PMI information is as follows:
  • an indication field in the high layer signaling may be used to indicate the transport layer.
  • Information two indication fields in the physical layer control signaling are used to indicate PMI information, for example, the indication field "Precoding information 1" is used to indicate the first PMI information, and the indication field "Precoding information 2" is used to indicate the second PMI information.
  • an indication field in the high-level signaling sent by the radio access network device may be used to indicate one or two or more PMI information, or may be used in the high-level signaling delivered by the radio access network device.
  • the multiple indication fields respectively indicate multiple PMI information. For example, two indication fields in the high layer signaling respectively indicate two PMI information, and three indication fields in the high layer signaling respectively indicate three PMI information.
  • Section 303 The terminal device performs uplink data transmission according to the precoding matrix indicated by the radio access network device.
  • the various feasible designs associated with FIG. 3 above may be applied to a non-precoded SRS scenario or a precoded SRS scenario in a 5G NR.
  • the antenna port configured by the terminal device may be extended to eight.
  • the antenna ports configured in the terminal device can be expanded to four.
  • the non-precoded SRS scenario is used as an example.
  • the embodiment of the present application provides a two-level codebook structure for uplink transmission.
  • One purpose is to reduce system signaling overhead.
  • This two-level codebook structure is used in conjunction with a hierarchical PMI indication mechanism.
  • u i and u′ i may be the same or different structured precoding vectors (could be the same or different structured precoding vectors) Indicates a co-phasing factor, which may be polarization phase information or phase difference information of a dual-polarized antenna.
  • the codebook used in the existing uplink transmission is only a first-level codebook, and the existing downlink codebook, for example, in LTE Release 8
  • the first-level codebook is adopted, and the codebook used in LTE Release 10 or LTE Release 12 is used to select one beam group, and the second codebook is used to select one beam from the selected beam group, and determine
  • the polarization phase information (cophasing) is different from the uplink two-level codebook scheme proposed by the embodiment of the present invention in that: the two-level codebook designed by the embodiment of the present invention, wherein the first-level codebook is used to select one The beam, the second-stage codebook is used to determine phase difference information (cophasing), and the phase difference information may be information of a phase difference of the cross-polarized antenna or information of a phase difference between the plurality of beams.
  • the two-level codebook involved in the embodiment of the present invention is two mutually independent codebooks, and the first PMI corresponding to the beam selection and the second PMI corresponding to the cophsing selection are compared with the config 1 codebook in the LTE Release 13.
  • the two PMIs in LTE Release 13 jointly determine a matrix, which is not flexible enough; and config 1/2/3/4 requires high-level parameter configuration, signaling overhead is relatively large, and there is no performance gain.
  • the embodiment of the present application further provides a method for indicating a precoding matrix.
  • this part may be used as a corresponding solution of FIG. 3 .
  • Option or a replaceable item.
  • the terminal device transmits an uplink reference signal, and the uplink reference signal may be a precoded SRS.
  • the radio access network device performs channel estimation according to the uplink reference signal transmitted by the terminal device, and performs matching by using a preset codebook and a channel matrix, and selects a corresponding precoding matrix according to the matching result, thereby determining corresponding to the precoding matrix.
  • PMI For the case of a two-stage codebook structure, the first-level codebook includes beam selection vector information, and the precoding vector in the codebook corresponds to a set of pre-selected beams, which may be an analog beam of the UE or a base station signaling. Inform the UE. For example, using a unit selection vector Forming a first level codebook, wherein Is a vector of length N, where the kth element is 1 and the other elements are 0.
  • the first level codebook can be in the following form:
  • the second level codebook includes phase compensation factor information for the polarized antenna.
  • the elements constituting the precoding matrix in the second level codebook may be QAM character sets ⁇ +1, -1, +j, -j ⁇ , etc. .
  • a possible form of second-level codebook might be:
  • Second codebook index Number of layers 1 0 [1 1] T 1 [1 -1] T 2 [1 +j] T 3 [1 -j] T
  • the number of layers is 1, and the two-level codebook structure can also be expressed as follows:
  • the first PMI corresponds to the first codebook index and may be a broadband PMI.
  • the second PMI corresponds to the second level codebook index and may be a subband PMI.
  • the first PMI indicated by the radio access network device to the terminal device may be used to directly select one beam
  • the second PMI indicated by the radio access network device to the terminal device may be used to determine the beam according to the foregoing first PMI.
  • the phase compensation factor of the cross-polarized antenna may be used to directly select one beam
  • the second PMI can be configured to be a sub-band level and can be adapted to the uplink OFDM system.
  • This embodiment can be applied to a precoded SRS scenario.
  • the uplink codebook does not support the two-level codebook structure, and the performance is poor under the frequency selective channel condition, which has significant advantages, for example, in the frequency selective channel scenario, the second PMI. It is a narrowband PMI, and the first PMI is a wideband PMI, which can further improve system performance compared to the prior art only one-stage wideband PMI.
  • the embodiment of the present application further provides a method for indicating a precoding matrix, which may be an option of the corresponding solution in FIG. 3, or Replaceable item.
  • the terminal device transmits an uplink reference signal (for example, SRS), and the radio access network device (for example, TRP) performs channel estimation according to the uplink reference signal transmitted by the terminal device, and performs matching by using a preset codebook and a channel matrix, according to the matching result.
  • the corresponding precoding matrix is selected to determine the PMI corresponding to the precoding matrix.
  • beam selection vector information may be included in the first level codebook, and the precoding vector in the codebook is composed of at least two of the following examples:
  • Example 1 A set of wide beams uniformly distributed in space. For example, you can take advantage of DFT vectors:
  • N is the number of antenna ports of the SRS
  • O is an integer greater than or equal to 1, indicating an oversampling factor.
  • the parameters N and O involved herein may be sent by the TRP to send downlink signaling (such as higher layer signaling, or It is physical layer signaling) configured for the UE.
  • Example 2 A part of the elements in the precoding vector is 0, and the other part forms a wide beam uniformly distributed in space by using the DFT form. For example, you can take advantage of DFT vectors:
  • N is the number of antenna ports of the SRS, and O is an integer greater than or equal to 1, indicating an oversampling factor, wherein the parameters involved in the formula can be configured by the TRP by sending downlink signaling (such as higher layer signaling, physical layer signaling).
  • downlink signaling such as higher layer signaling, physical layer signaling
  • Example 3 A part of the element in the precoding vector is 0, for example:
  • [a 1 ... a k ] is a precoding vector designed according to Glassman packing theory.
  • the precoding vector is designed by using the Glassman packing theory, and the precoding vector can be obtained based on a Householder matrix or a DFT matrix.
  • the first 16 precoding vectors in the uplink transmission 4-port codebook can be designed as follows:
  • the first level codebook may include the precoding vector in the foregoing example one and the second example.
  • the first level codebook may also include the precoding vector in the example one and the third example.
  • the first level codebook may also include the precoding vectors in Example 1, Example 2, and Example 3. If the UE uses a two-dimensional antenna array, the first-level codebook can be formed in a similar manner, and details are not described herein again.
  • the second level codebook contains phase compensation factor information for the polarized antenna, and the elements constituting the precoding matrix in the second level codebook may be e j ⁇ n/2 , for example, QAM character set +1, -1, +j, -j Wait.
  • a possible design for the second level codebook is as follows:
  • Second codebook index Number of layers 1 0 [1 1] T 1 [1 -1] T 2 [1 +j] T 3 [1 -j] T
  • the two-level codebook structure can also be designed as follows:
  • P is a factor that normalizes the precoding vector power in the codebook.
  • the format of the codebook may be similar to the foregoing design, except that the first codebook index becomes two values of m and l, and details are not described herein again.
  • the first PMI indicated by the radio access network device to the terminal device may correspond to the first codebook index, where the first PMI may be a broadband PMI, and the radio access network device indicates the second PMI to the terminal device.
  • the second PMI may be a subband PMI.
  • the first PMI and the second PMI may have different indication periods.
  • the network side radio access network device may indicate the first PMI and the second PMI to the terminal device by using downlink signaling, where the downlink signaling may be physical layer signaling or higher layer signaling (such as RRC or MAC layer) signaling.
  • the access network device may indicate the first PMI to the terminal device by using downlink signaling, and the access network device further notifies the terminal device of the time-frequency resource used by the second PMI in the data channel, where the UE passes the The second PMI is demodulated on the corresponding time-frequency resource, so that the terminal device determines the uplink pre-coding matrix according to the first PMI and the second PMI, and performs uplink data transmission.
  • TRP time-frequency resource used by the second PMI in the data channel
  • This embodiment combines the design ideas of uplink beam management and precoding matrix indication, and the codebook design is simple.
  • the second PMI indicated by the radio access network device to the terminal device can be configured as a sub-band level, so that the uplink OFDM system can be better adapted.
  • This embodiment can be applied to a non-precoded SRS scene or a precoded SRS scene.
  • the embodiment of the present invention may be applied to the uplink precoding transmission in the scenario to further improve the transmission performance.
  • the uplink codebook does not support the two-level codebook structure, resulting in poor performance under the frequency selective channel condition, and in the prior art, the downlink codebook technology design is not simple enough, and the wireless access network device Selecting a beam group according to the first PMI indicated by the terminal device uplink, the radio access network device selects one beam from the beam group according to the second PMI indicated by the terminal device uplink, and determines a phase compensation factor of the cross-polarized antenna.
  • the terminal device directly selects one beam according to the first PMI sent by the radio access network device, and the terminal device determines according to the second PMI delivered by the radio access network device and the beam selected according to the first PMI.
  • the phase compensation factor of the cross-polarized antenna is not support the two-level codebook structure, resulting in poor performance under the frequency selective channel condition, and in the prior art, the downlink codebook technology design is not simple enough, and the wireless access network device Selecting a beam group according to the first PMI indicated by the terminal device uplink, the radio access network device
  • the number of the codebook such as the "first codebook”, the “first PMI”, etc.
  • the codebook of the same number is implemented in different embodiments.
  • the mode may correspond to different roles; the same numbered codebook and subcodebook, such as the first codebook and the first PMI, do not have to have a affiliation or a hierarchical relationship in logic and use, for example, the first subcodebook also It can be defined as a fourth codebook and used independently, which is not limited in this 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 taken to the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the embodiment of the invention provides a wireless communication device 400.
  • a schematic block diagram of the network device can be as shown in FIG. 4.
  • 4 is a schematic block diagram of a wireless communication device 400 in accordance with an embodiment of the present invention.
  • the wireless communication device 400 includes a receiving unit 410 and a processing unit 420.
  • the wireless communication device 400 can correspond to various feasible designs of the wireless communication device according to the selective statement according to the embodiment of the present invention and the indication method 300 of the embodiment precoding matrix corresponding to FIG. 3, the wireless communication device
  • the device 400 may include various feasible designs (such as a first wireless communication device, terminal) for performing the selective statement according to an embodiment of the present invention and the indication method 300 of the embodiment precoding matrix corresponding to FIG. A unit of a method performed by a device, or UE, etc.).
  • the various units in the network device 400 and the other operations and/or functions described above are respectively applicable to implement the selective statement according to an embodiment of the present invention and the indication method 300 of the embodiment precoding matrix corresponding to FIG. 3
  • the corresponding process of the design for the sake of brevity, will not be repeated here.
  • the embodiment of the invention provides a wireless communication device 500.
  • a schematic block diagram of the wireless communication device 500 can be as shown in FIG. 5.
  • FIG. 5 is a schematic block diagram of a wireless communication device 500 in accordance with an embodiment of the present invention. As shown in FIG. 5, the wireless communication device 500 includes a transmitting unit 510 and a processing unit 520.
  • the wireless communication device 500 can correspond to various feasible designs of the wireless communication device according to the selective statement according to the embodiment of the present invention and the indication method 300 of the embodiment precoding matrix corresponding to FIG. 3, the wireless communication device
  • the device 400 may include various feasible designs (such as a second wireless communication device, wireless) for performing the selective statement according to an embodiment of the present invention and the indication method 300 of the embodiment precoding matrix corresponding to FIG. A unit of a method of accessing a network device, or a TRP, etc.).
  • the various units in the terminal device 500 and the other operations and/or functions described above are respectively applicable to implement the selective statement according to the embodiment of the present invention and the indication method 300 of the embodiment precoding matrix corresponding to FIG. 3
  • the corresponding process of the design for the sake of brevity, will not be repeated here.
  • FIG. 6 is a schematic block diagram of a wireless communication device 600 in accordance with another embodiment of the present invention.
  • the wireless communication device 600 includes a transceiver 610, a processor 620, a memory 630, and a bus system 640.
  • the transceiver 640, the processor 620, and the memory 630 are connected by a bus system 640.
  • the memory 630 is configured to store program instructions, and the processor 620 is configured to execute the instructions stored in the memory 630 to control the transceiver 610 to send and receive signals. And causing the wireless communication device 600 to perform a corresponding function.
  • the memory 630 may be configured in the processor 620 or may be independent of the processor 620.
  • the wireless communication device 600 can correspond to a wireless communication device of various feasible designs involved in the selective statement according to the embodiment of the present invention and the indication method 300 of the embodiment precoding matrix corresponding to FIG. 3, the wireless communication device The device 600 can include various feasible designs (such as a first wireless communication device, terminal) for performing the selective statement according to an embodiment of the present invention and the indication method 300 of the embodiment precoding matrix corresponding to FIG.
  • the description of the method for indicating the method of the pre-coding matrix 300 of the various possible designs is not repeated here.
  • the embodiment of the present invention further provides a wireless communication device 700.
  • a schematic block diagram of the wireless communication device 700 can be as shown in FIG. 7.
  • FIG. 7 is a schematic block diagram of a wireless communication device 700 in accordance with another embodiment of the present invention.
  • the wireless communication device 700 includes a transceiver 710, a processor 720, a memory 730, and a bus system 740.
  • the transceiver 740, the processor 720 and the memory 730 are connected by a bus system 740 for storing instructions for executing instructions stored in the memory 730 to control the transceiver 710 to send and receive signals, and
  • the wireless communication device 700 is caused to perform the corresponding function.
  • the memory 730 may be configured in the processor 720 or may be independent of the processor 720.
  • the wireless communication device 700 can correspond to a wireless communication device of various feasible designs involved in the selective statement according to the embodiment of the present invention and the indication method 300 of the embodiment precoding matrix corresponding to FIG.
  • the device 700 can include various feasible designs (such as a second wireless communication device, wireless) for performing the selective statement according to an embodiment of the present invention and the indication method 300 of the embodiment precoding matrix corresponding to FIG. A physical unit of a method performed by an access network device, or TRP, etc.).
  • each of the physical units in the wireless communication device 700 and the other operations and/or functions described above are respectively implemented in order to implement the selective statement according to an embodiment of the present invention and the method 300 for indicating the precoding matrix of the embodiment corresponding to FIG.
  • the corresponding process of a feasible design for the sake of brevity, will not be repeated here.
  • the processor in the embodiment of the present invention may be an integrated circuit chip with signal processing capability.
  • each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the processor may be a central processing unit ("CPU"), and may be other general-purpose processors, digital signal processors ("DSP"), and application-specific integrated circuits ( Application Specific Integrated Circuit (“ASIC”), Field Programmable Gate Array (“FPGA”) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software in the decoding processor.
  • the software can be located in a random storage medium, such as a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.
  • the memory in embodiments of the invention may be a volatile memory or a non-volatile memory, or may include both volatile and nonvolatile memory.
  • the non-volatile memory may be a read-only memory (Read-Only Memory (ROM), a programmable read only memory (PROM), or an erasable programmable read only memory (Erasable PROM). , referred to as "EPROM”), electrically erasable programmable read only memory (“EEPROM”) or flash memory.
  • the volatile memory may be a Random Access Memory (“RAM”), which is used as an external cache.
  • RAM Random Access Memory
  • many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory.
  • SDRAM Synchronous DRAM
  • Double Data Rate SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM Enhanced SDRAM
  • SLDRAM synchronously connected dynamic random access memory
  • Direct RAMbus direct memory bus random access memory
  • bus system may include, in addition to the data bus, a power bus, a control bus, a status signal bus, and the like.
  • bus systems in the figure.
  • each step of the above method may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the steps of the method for data transmission disclosed in connection with the embodiments of the present invention may be directly implemented as hardware processor execution completion, or performed by hardware and software combination in the processor.
  • the software can be located in a random storage medium, such as a flash memory, a read only memory, a programmable read only memory or an electrically erasable programmable memory, a register, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method. To avoid repetition, it will not be described in detail here.
  • Embodiments of the present invention also provide a computer readable storage medium storing one or more programs, the one or more programs including instructions that are executed by an electronic device that includes a plurality of applications
  • the electronic device can be enabled to perform the selective statement of the embodiment of the present invention and the method of the embodiment shown in FIG.
  • 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 invention 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 invention 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 invention.
  • 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

L'invention concerne un procédé d'instruction de matrice de précodage. Un premier appareil de communication sans fil obtient une première instruction et une deuxième instruction provenant d'un deuxième appareil de communication sans fil, la première instruction étant utilisée pour donner comme consigne au premier appareil de communication sans fil d'envoyer sans fil, au deuxième appareil de communication sans fil, une première matrice de précodage qu'il est nécessaire d'utiliser, et la deuxième instruction étant utilisée pour donner comme consigne au premier appareil de communication sans fil d'envoyer sans fil, au deuxième appareil de communication sans fil, une deuxième matrice de précodage qu'il est nécessaire d'utiliser; la première matrice de précodage comportant des informations concernant un faisceau utilisé lorsque le premier appareil de communication sans fil effectue une émission sans fil vers le deuxième appareil de communication sans fil, et la première matrice de précodage appartenant à un premier répertoire de code; et la deuxième matrice de précodage comportant des informations concernant une différence de phase utilisée lorsque le premier appareil de communication sans fil effectue une émission sans fil vers le deuxième appareil de communication sans fil, et la deuxième matrice de précodage appartenant à un deuxième répertoire de code. Le procédé décrit dans la présente demande améliore efficacement les performances d'émission MIMO en liaison montante dans un scénario où des antennes multiples sont configurées du côté d'un UE.
PCT/CN2018/071641 2017-01-06 2018-01-05 Procédé, appareil et système d'instruction de matrice de précodage WO2018127151A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710011330.4A CN108282207B (zh) 2017-01-06 2017-01-06 一种预编码矩阵指示方法、装置和系统
CN201710011330.4 2017-01-06

Publications (1)

Publication Number Publication Date
WO2018127151A1 true WO2018127151A1 (fr) 2018-07-12

Family

ID=62789173

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/071641 WO2018127151A1 (fr) 2017-01-06 2018-01-05 Procédé, appareil et système d'instruction de matrice de précodage

Country Status (2)

Country Link
CN (1) CN108282207B (fr)
WO (1) WO2018127151A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111385823A (zh) * 2018-12-29 2020-07-07 中兴通讯股份有限公司 信号的处理方法及装置
WO2020227013A1 (fr) * 2019-05-03 2020-11-12 Qualcomm Incorporated Commande d'exposition à la densité de puissance
CN112703753A (zh) * 2019-01-23 2021-04-23 Oppo广东移动通信有限公司 传输信号的方法、终端设备和网络设备
CN113346936A (zh) * 2019-01-07 2021-09-03 Oppo广东移动通信有限公司 一种码本处理方法、终端设备及网络设备
CN114070366A (zh) * 2020-07-30 2022-02-18 华为技术有限公司 一种通信方法及装置
WO2024045804A1 (fr) * 2022-08-30 2024-03-07 华为技术有限公司 Procédé, appareil et système de communication, support de stockage et produit programme d'ordinateur

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115190631A (zh) * 2019-01-11 2022-10-14 维沃移动通信有限公司 上行信道的配置方法、传输方法、网络侧设备及终端
US10924240B2 (en) * 2019-03-26 2021-02-16 Qualcomm Incorporated Sounding reference signal transmission to indicate a virtual antenna port
EP4097849A4 (fr) * 2020-01-30 2024-02-21 Qualcomm Inc Indication de précodeur sélectif en fréquence
WO2021207895A1 (fr) * 2020-04-13 2021-10-21 华为技术有限公司 Procédé de transmission de signal de liaison montante et appareil de communication
EP4131825A4 (fr) * 2020-05-06 2023-06-07 Huawei Technologies Co., Ltd. Procédé d'émission de signal de référence de liaison montante, procédé de réception de signal de référence de liaison montante et dispositif de communication
RU2758348C1 (ru) * 2020-12-15 2021-10-28 Федеральное государственное бюджетное образовательное учреждение высшего образования "Московский автомобильно-дорожный государственный технический университет (МАДИ)" Способ кодирования и передачи данных по радиоканалам
CN114696879B (zh) * 2020-12-31 2023-08-04 大唐移动通信设备有限公司 信号传输方法及装置、终端、接入网设备
CN113644945B (zh) * 2021-08-09 2022-05-10 哲库科技(北京)有限公司 码本确定方法、装置、设备及存储介质
CN115765805A (zh) * 2021-09-03 2023-03-07 索尼集团公司 电子设备、通信方法和计算机程序产品
CN116614162A (zh) * 2022-02-09 2023-08-18 维沃移动通信有限公司 预编码指示方法、装置、通信设备、系统及存储介质
WO2024077448A1 (fr) * 2022-10-10 2024-04-18 华为技术有限公司 Procédé de communication, appareil, système de puce, support de stockage et produit programme d'ordinateur

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104009785A (zh) * 2013-02-25 2014-08-27 华为技术有限公司 码本反馈方法、用户设备和基站
US9287948B2 (en) * 2014-05-11 2016-03-15 Lg Electronics Inc. Method and apparatus for receiving downlink wireless signal
CN105450273A (zh) * 2015-08-24 2016-03-30 电信科学技术研究院 一种传输编码指示信息和确定预编码矩阵的方法和装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9281881B2 (en) * 2013-02-12 2016-03-08 Texas Instruments Incorporated 4TX codebook enhancement in LTE
CN104935365B (zh) * 2014-03-21 2019-01-01 日本电气株式会社 用于多用户传输的方法和设备

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104009785A (zh) * 2013-02-25 2014-08-27 华为技术有限公司 码本反馈方法、用户设备和基站
US9287948B2 (en) * 2014-05-11 2016-03-15 Lg Electronics Inc. Method and apparatus for receiving downlink wireless signal
CN105450273A (zh) * 2015-08-24 2016-03-30 电信科学技术研究院 一种传输编码指示信息和确定预编码矩阵的方法和装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI ET AL.: "Discussion on DMRS Based Open Loop Transmission", 3GPP TSG RAN WG1 MEETING #84BIS, RL-162600, 15 April 2016 (2016-04-15), XP051080288, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_84b/Docs/> *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111385823A (zh) * 2018-12-29 2020-07-07 中兴通讯股份有限公司 信号的处理方法及装置
CN113346936A (zh) * 2019-01-07 2021-09-03 Oppo广东移动通信有限公司 一种码本处理方法、终端设备及网络设备
CN113346936B (zh) * 2019-01-07 2022-09-13 Oppo广东移动通信有限公司 一种码本处理方法、终端设备及网络设备
US11575418B2 (en) 2019-01-07 2023-02-07 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Codebook processing method, terminal device and network device
US11894896B2 (en) 2019-01-07 2024-02-06 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Codebook processing method, terminal device and network device
CN112703753A (zh) * 2019-01-23 2021-04-23 Oppo广东移动通信有限公司 传输信号的方法、终端设备和网络设备
WO2020227013A1 (fr) * 2019-05-03 2020-11-12 Qualcomm Incorporated Commande d'exposition à la densité de puissance
US11303327B2 (en) 2019-05-03 2022-04-12 Qualcomm Incorporated Power density exposure control
CN114070366A (zh) * 2020-07-30 2022-02-18 华为技术有限公司 一种通信方法及装置
US11894886B2 (en) 2020-07-30 2024-02-06 Huawei Technologies Co., Ltd. Communication method and apparatus
WO2024045804A1 (fr) * 2022-08-30 2024-03-07 华为技术有限公司 Procédé, appareil et système de communication, support de stockage et produit programme d'ordinateur

Also Published As

Publication number Publication date
CN108282207A (zh) 2018-07-13
CN108282207B (zh) 2021-06-15

Similar Documents

Publication Publication Date Title
WO2018127151A1 (fr) Procédé, appareil et système d&#39;instruction de matrice de précodage
KR102310164B1 (ko) 첨단 무선 통신 시스템에서의 명시적 csi 보고 방법 및 장치
US10958320B2 (en) Communication method, communications apparatus, and system
KR102365349B1 (ko) 첨단 무선 통신 시스템에서의 첨단 csi 보고
WO2017050295A1 (fr) Procédé et appareil de mesure de canal multi-antenne
JP2022008471A (ja) 高度ｃｓｉフィードバックオーバヘッド低減のための構成可能コードブック
WO2018028310A1 (fr) Procédé et appareil de détermination d&#39;une matrice de précodage
CN112751592B (zh) 上报信道状态信息的方法和通信装置
WO2012159343A1 (fr) Procédé de diversité en transmission, et dispositif et système associés
EP3602838A1 (fr) Procédures de gestion de faisceau pour équipement d&#39;utilisateur et point d&#39;émission et de réception
WO2018028291A1 (fr) Procédé d&#39;apprentissage de formation de faisceau, terminal, et station de base
US9806778B2 (en) Method and apparatus for mapping virtual antenna to physical antenna
KR20100133883A (ko) 다중 안테나 시스템에서의 코드북 설계 방법 및 데이터 전송 방법
EP3332488A1 (fr) Procédé et appareil de rétroaction à court terme dans des communications à entrées multiples et sorties multiples
WO2018175738A1 (fr) Mise en œuvre de livre de codes dans un équipement utilisateur et système de station de base
KR20150121185A (ko) 이동국, 기지국 및 통신 제어 방법
WO2020143580A1 (fr) Procédé d&#39;indication de vecteur pour la construction d&#39;un vecteur de précodage, et appareil de communication
CN111865376B (zh) 一种通信方法及装置
WO2018196230A1 (fr) Procédé, appareil associé et système d&#39;émission de signaux d&#39;antennes multiples de liaison montante
WO2014181444A1 (fr) Station mobile et procédé de signalisation
US20210399781A1 (en) Method for quantization of combination coefficients associated with frequency domain compression
WO2021081847A1 (fr) Procédé de mesure de canal et appareil de communication
US20220416866A1 (en) Channel state information feedback method and communications apparatus
EP3847762B1 (fr) Conception de mappage de port sur antenne dans un système d&#39;antenne active (aas) virtualisé
WO2023011570A1 (fr) Procédé de rétroaction d&#39;informations de canal et appareil de communication

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: 18736628

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18736628

Country of ref document: EP

Kind code of ref document: A1