WO2024007918A1 - Procédé et appareil d'indication de matrice de précodage, procédé et appareil de détermination de matrice de précodage, et dispositif côté réseau et terminal - Google Patents

Procédé et appareil d'indication de matrice de précodage, procédé et appareil de détermination de matrice de précodage, et dispositif côté réseau et terminal Download PDF

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Publication number
WO2024007918A1
WO2024007918A1 PCT/CN2023/103278 CN2023103278W WO2024007918A1 WO 2024007918 A1 WO2024007918 A1 WO 2024007918A1 CN 2023103278 W CN2023103278 W CN 2023103278W WO 2024007918 A1 WO2024007918 A1 WO 2024007918A1
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Prior art keywords
precoding
information
indication
precoding matrix
indication field
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PCT/CN2023/103278
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English (en)
Chinese (zh)
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塔玛拉卡拉盖施
吴昊
刘昊
袁江伟
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维沃移动通信有限公司
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Publication of WO2024007918A1 publication Critical patent/WO2024007918A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/231—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the layers above the physical layer, e.g. RRC or MAC-CE signalling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling

Definitions

  • This application belongs to the field of communication technology, and specifically relates to a precoding matrix indication, determination method, device, network side equipment and terminal.
  • Enhanced uplink (Uplink, UL) multiple-input multiple-output will support multiple codebooks, such as: 4-antenna codebook based on Release-15 (Release-15, Rel-15) Construct an 8-antenna codebook or a codebook based on Discrete Fourier Transform (DFT) vectors such as the Rel-15 downlink codebook.
  • the codebooks supported by different terminal capabilities are also different.
  • the terminal reports the capability to the base station to indicate the type of codebooks it supports.
  • a terminal with strong capabilities may support multiple codebooks.
  • the base station configures the one supported by the terminal through high-level signaling. Codebook.
  • the precoding matrix used by the base station to instruct the terminal to transmit uplink data is called the Transmit Precoding Matrix Indicator (TPMI).
  • TPMI Transmit Precoding Matrix Indicator
  • Embodiments of the present application provide a precoding matrix indication, determination method, device, network side equipment and terminal, which can realize the indication of TPMI and the determination of the precoding matrix used in uplink data transmission.
  • a method for determining a precoding matrix including:
  • the terminal receives the downlink control information DCI sent by the network side device, where the DCI carries indication information of the transmission precoding index TPMI;
  • the terminal determines the precoding matrix used for uplink data transmission according to the indication information of the TPMI.
  • a precoding matrix determination device which is applied to a terminal and includes:
  • the first receiving module is configured to receive downlink control information DCI sent by the network side device, where the DCI carries indication information of the transmission precoding index TPMI;
  • the first determination module is configured to determine the precoding matrix used for uplink data transmission according to the indication information of the TPMI.
  • a precoding matrix indication method including:
  • the network side device determines the indication method of the transmission precoding index TPMI in the downlink control information DCI;
  • the network side device sends DCI to the terminal according to the indication method, and the DCI carries TPMI indication information.
  • a precoding matrix indication device applied to network side equipment, including:
  • the second determination module is used to determine the indication mode of the transmission precoding index TPMI in the downlink control information DCI;
  • the first sending module is configured to send DCI to the terminal according to the indication method, where the DCI carries indication information of TPMI.
  • a terminal in a fifth aspect, includes a processor and a memory.
  • the memory stores programs or instructions that can be run on the processor.
  • the program or instructions are executed by the processor, the following implementations are implemented: The steps of the method described in one aspect.
  • a terminal including a processor and a communication interface, wherein the communication interface is used to receive downlink control information DCI sent by a network side device, and the DCI carries indication information of a transmission precoding index TPMI;
  • the processor is configured to determine a precoding matrix used for uplink data transmission according to the indication information of the TPMI.
  • a network side device in a seventh aspect, includes a processor and a memory.
  • the memory stores programs or instructions that can be run on the processor.
  • the program or instructions are executed by the processor.
  • a network side device including a processor and a communication interface, wherein the processor is used to determine the indication mode of the transmission precoding index TPMI in the downlink control information DCI; the communication interface is used to determine the indication method according to the In the above indication method, DCI is sent to the terminal, and the DCI carries TPMI indication information.
  • a ninth aspect provides a communication system, including: a terminal and a network side device.
  • the terminal can be used to perform the steps of the precoding matrix determination method as described in the first aspect.
  • the network side device can be used to perform the steps of the precoding matrix determination method as described in the first aspect. The steps of the precoding matrix indication method described in the three aspects.
  • a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method are implemented as described in the first aspect. The steps of the method described in the third aspect.
  • a chip in an eleventh aspect, includes a processor and a communication interface.
  • the communication interface is coupled to the processor.
  • the processor is used to run programs or instructions to implement the method described in the first aspect. method, or implement a method as described in the third aspect.
  • a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the first aspect or the second aspect.
  • the terminal determines the instructions for uplink data transmission based on the indication information of TPMI.
  • the precoding matrix adopted can accurately perform TPMI instructions and ensure uplink data transmission. Accurately determine the precoding matrix used to ensure accurate transmission of uplink data.
  • Figure 1 is a block diagram of a wireless communication system applicable to the embodiment of the present application.
  • Figure 2 is a schematic flowchart of a method for determining a precoding matrix according to an embodiment of the present application
  • Figure 3 is a schematic flowchart of a precoding matrix indication method according to an embodiment of the present application.
  • Figure 4 is a schematic module diagram of a precoding matrix determination device according to an embodiment of the present application.
  • Figure 5 is a schematic structural diagram of a terminal according to an embodiment of the present application.
  • Figure 6 is a schematic module diagram of a precoding matrix indication device according to an embodiment of the present application.
  • Figure 7 is a schematic structural diagram of a network side device according to an embodiment of the present application.
  • Figure 8 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • first, second, etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and “second” are distinguished objects It is usually one type, and the number of objects is not limited.
  • the first object can be one or multiple.
  • “and/or” in the description and claims indicates at least one of the connected objects, and the character “/" generally indicates that the related objects are in an "or” relationship.
  • LTE Long Term Evolution
  • LTE-Advanced, LTE-A Long Term Evolution
  • LTE-A Long Term Evolution
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency Division Multiple Access
  • NR New Radio
  • FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable.
  • the wireless communication system includes a terminal 11 and a network side device 12.
  • the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop Laptop Computer, also known as notebook computer, Personal Digital Assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), Mobile Internet Device , MID), augmented reality (AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Devices), vehicle user equipment (VUE), pedestrian terminals (Pedestrian User Equipment) , PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (PC), teller machines or self-service machines and other terminal-side devices
  • wearable Equipment includes: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart ankle
  • the network side device 12 may include an access network device or a core network device, where the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a wireless access network unit.
  • Access network equipment may include base stations, Wireless Local Area Networks (WLAN) access points or WiFi nodes, etc.
  • the base stations may be called Node B, Evolved Node B (eNB), access point, base transceiver station ( Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B-node, home evolved B-node, transmitting and receiving point ( Transmitting Receiving Point (TRP) or some other appropriate terminology in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiment of this application, only in the NR system The base station is introduced as an example, and the specific type of base station is not limited.
  • this embodiment of the present application provides a method for determining a precoding matrix, which includes:
  • Step 201 The terminal receives downlink control information (DCI) sent by the network side device.
  • DCI downlink control information
  • the DCI carries indication information of the transmission precoding index (Transmit Precoding Matrix Indicator, TPMI);
  • Step 202 The terminal determines the precoding matrix used for uplink data transmission according to the indication information of the TPMI.
  • the downlink control information DCI carrying the indication information of TPMI is instructed to the terminal through the network side device, and the precoding matrix used for uplink data transmission is determined based on the indication information of TPMI, so that the transmission can be carried out accurately.
  • the determination of the precoding matrix used in uplink data transmission ensures accurate transmission of uplink data.
  • the indication information of the TPMI is indicated through at least one precoding indication field.
  • the fourth precoding indication field for indicating phase information
  • A15 Perform at least two fifth precoding indication fields for indicating precoding matrices corresponding to different codebooks
  • the sixth precoding indication field that jointly indicates transmission rank and phase information
  • the first part of information and the second part of information are used to determine the precoding matrix in the codebook.
  • the at least one precoding indication field can be divided into the following situations.
  • the DCI usually includes a first precoding indication field that jointly indicates the transmission rank and precoding matrix.
  • Expression form 1 a second precoding indication field for indicating transmission rank and a third precoding indication field for indicating precoding matrix;
  • each ninth precoding indication field indicates a precoding matrix in the same codebook.
  • Expression form three two fifth precoding indication fields for indicating precoding matrices corresponding to different codebooks
  • Expression form four a third precoding indication field for indicating the precoding matrix and a sixth precoding indication field for jointly indicating the transmission rank and phase information.
  • Expression 5 jointly perform the first precoding indication field for indicating the transmission rank and precoding matrix and the fourth precoding indication field for indicating the phase information;
  • Expression form 6 The seventh precoding indication field indicating the first part of information of a codebook and the eighth precoding indication field of the second part of information;
  • the seventh precoding indication field indicates the first component (i_1,1) of the precoding matrix
  • the eighth precoding indication field indicates the second component (i_1,2) of the precoding matrix
  • Expression form 1 a second precoding indication field for indicating transmission rank, a third precoding indication field for indicating precoding matrix, and a fourth precoding indication field for indicating phase information;
  • Expression 2 a second precoding indication field for indicating transmission rank and at least two ninth precoding indication fields corresponding to a precoding matrix indication of the same codebook;
  • Expression form three a second precoding indication field for indicating transmission rank, and two fifth precoding indication fields for indicating precoding matrices corresponding to different codebooks;
  • Expression form four a second precoding indication field for indicating transmission rank, a seventh precoding indication field for indicating the first part of information of a codebook, and an eighth precoding indication field for indicating the second part of information.
  • the indication method is used to constrain how many precoding indication fields are carried in the DCI, and the specific content indicated by each precoding indication field. That is to say, the indication method specifically refers to at least one precoding indication field.
  • the included content that is, the indication information used by the indication method to indicate TPMI is indicated through at least one of A11 to A18; after determining the indication method of TPMI, the network side device sends DCI to the terminal according to the indication method.
  • the network side device needs to determine the indication method of TPMI in the DCI based on the codebook type corresponding to the codebook configured for the terminal, information related to the codebook, and the value of the supported transmission rank; it is required
  • the codebook types include Type I single panel codebook, Type I multi panel codebook, Type II codebook, enhanced eType II codebook, etc.
  • the information related to the codebook may include the number of antennas ( For example, the number of horizontal antennas N1, the number of vertical antennas N2), the oversampling factor of the Discrete Fourier Transform (DFT) vector (the oversampling factor O1 of the N1 dimension, the oversampling factor O2 of the N2 dimension), Codebook Subset Restriction (CBSR), etc.
  • DFT Discrete Fourier Transform
  • the network-side device can also configure first information through high-level signaling.
  • the first information is used to indicate the first set of precoding matrices that the terminal can use, so
  • the first information includes at least one of the following: codebook type, information related to the codebook, transmission rank limit, and CBSR.
  • the terminal can determine the specific precoding matrices that the terminal can use. Currently, in some cases, not all precoding matrices may be used by the terminal.
  • the network side device can send second information to the terminal through the Media Access Control Layer Control Unit (MAC CE), the second information is used to indicate the second precoding matrix set, the The second precoding matrix set is a subset of the first precoding matrix set, that is, the high-level signaling configuration is a total precoding matrix set. The range of the precoding matrix set that can be used can be further narrowed through MAC CE.
  • MAC CE Media Access Control Layer Control Unit
  • DCI indicates a precoding matrix within a small range, which can reduce the overhead of the indication domain in DCI.
  • precoding matrix 1 to precoding matrix 100 are configured through high-level signaling, and then the MAC CE is used to indicate that the specific precoding matrices that can be used are precoding matrix 50 to precoding matrix 80.
  • the final determination is made through the TPMI carried in the DCI.
  • the precoding matrix used for uplink transmission is precoding matrix 76.
  • the second information includes at least one of the following: B11, the start index and the end index of the precoding matrix; B12, at least one group of precoding matrix indications; B13, the bit map.
  • the terminal can also send capability information to the network side device.
  • the capability information includes at least one supported by the terminal for uplink transmission.
  • Codebook information may include codebook type, antenna architecture, codebook-related information, and supported transmission rank values.
  • the at least one precoding indication field includes a first precoding indication field that jointly indicates the transmission rank and precoding matrix, or the at least one precoding indication field includes a seventh precoding indication field that indicates the first part of information of a codebook. Coding indication field and the eighth precoding indication field of the second part of information
  • the terminal determines the implementation method of the precoding matrix used for uplink data transmission according to the indication information of the TPMI, including:
  • the precoding matrix used in uplink data transmission corresponding to the indication information of the TPMI
  • the first mapping relationship includes:
  • the precoding matrices corresponding to the same codebook under the same transmission rank are sorted respectively, and the precoding matrices are corresponding to the TPMI according to the sorting order.
  • the transmission rank and the precoding matrix corresponding to the same codebook are uniformly sorted.
  • the values of the transmission rank are 1 and 2, and the precoding matrix includes precoding matrix 1 to precoding matrix 10.
  • this mapping method may be adopted in case one, expression form five, expression form six in case two, and expression form four in case three of the above-mentioned division of at least one precoding indication domain.
  • the at least one precoding indication field includes a third precoding indication field for indicating a precoding matrix.
  • the terminal determines the implementation method of the precoding matrix used for uplink data transmission according to the indication information of the TPMI, including:
  • the precoding matrix used in uplink data transmission corresponding to the indication information of the TPMI
  • the second mapping relationship includes the following:
  • the precoding matrices corresponding to the same codebook under each transmission rank are uniformly sorted, and the precoding matrices under different transmission ranks are mapped to TPMI respectively.
  • TPMI corresponding to precoding matrices under different transmission ranks may be the same.
  • the transmission rank and the precoding matrix are jointly sorted, and then the precoding matrix and TPMI are mapped based on the overall sorting.
  • the expression form 1 in case 2 the expression form 4, and the expression form 1 in case 3 can all adopt this mapping method.
  • the at least one precoding indication field includes at least two fifth precoding indication fields that respectively indicate precoding matrices corresponding to different codebooks.
  • the terminal determines the implementation method of the precoding matrix used for uplink data transmission according to the indication information of the TPMI, including:
  • the third expression in case two and the third expression in case three can be used to obtain the precoding matrix in this manner.
  • the transmission rank indicated by the second precoding indication field is less than or equal to at least two fifth The number of transmission layers that can be supported by the direct product operation result of the precoding matrix indicated by the precoding indication field; optionally, the precoding matrix indicated by at least two fifth precoding indication fields is Direct product operation is used to determine the precoding matrix used for uplink data transmission as follows:
  • the direct product operation result will be the same as the transmission rank indicated by the second precoding indication field.
  • Precoding vectors with the same rank and number of columns are used as the precoding matrix used for uplink data transmission.
  • the precoding vector with the same number of columns as the transmission rank indicated by the second precoding indication field is used as the precoding matrix used for uplink data transmission: :
  • N is equal to the transmission rank indicated by the second precoding indication field.
  • the at least one precoding indication field includes at least two ninth precoding indication fields corresponding to the precoding matrix indication of the same codebook.
  • two precoding matrices are respectively indicated.
  • the terminal determines the precoding matrix used for uplink data transmission according to the indication information of the TPMI.
  • Implementation methods include:
  • the transmission rank of the finally obtained precoding matrix is the product of the transmission ranks corresponding to at least two precoding matrices indicated by the ninth precoding indication field.
  • the above-mentioned expression form 2 in case 2 and expression form 2 in case 3 may adopt this method of determining the precoding matrix used for uplink data transmission.
  • the terminal supports the DFT-based Type I codebook, and the base station configures the DFT-based Type I codebook for the terminal.
  • the control signaling DCI contains a precoding indication field, which is jointly transmitted. Rank and precoding matrix indication.
  • the mapping relationship between TPMI and specific precoding matrix indicated by this indication field is as follows:
  • the transmission rank identifier RI
  • the precoding matrix used for upload transmission is represented by the TPMI
  • the indication field jointly indicates the RI and the TPMI.
  • the optional transmission rank values include X ⁇ r 1 , r 2 , ...
  • TPMI optional values include Y n (i n,0 is the value of the first TPMI corresponding to the value of the nth transmission rank; for example, determined based on N1, N2, O1, O2 or CBSR, etc.), then
  • TPMI is
  • the indication field jointly indicates the RI, the first TPMI (i_1) and the second TPMI (i_2).
  • the optional values of RI include X ⁇ r 1 , r 2 ,..., r
  • the above example can be further expanded to include more information, such as rank, the first component (i_1,1), the second component (i_1,2), the phase (i_2) of the precoding matrix, or the number of optional values of i_2 Depending on the value of i_1 (or i_1,1, i_1,2), it can also be used to indicate the domain in other specific application situations.
  • the terminal supports the DFT-based Type I codebook, and the base station configures the DFT-based Type I codebook for the terminal.
  • the control signaling DCI contains two precoding indication fields, one of which is used for indication.
  • the transmission rank and another indication field are used to indicate the precoding matrix corresponding to the indicated transmission rank.
  • the mapping relationship between the indication field and the specific precoding matrix is as follows:
  • Indication field used to indicate the transmission rank For example, when the maximum rank is supported is 1, this field is 0 bits, when the maximum rank is supported is 2, the field is 1 bit, when the maximum rank is supported is 4, the field is 2 bits, this field is 3 bits when the maximum supported rank is 8; or the length of the indication field is determined by the transmission rank restriction (rank restriction). For example, the maximum supported transmission rank is 8, but the base station is configured with a transmission rank restriction (rank restriction) is ⁇ 4, 5, 6, 7 ⁇ , that is to say, only transmission rank ⁇ 1, 2, 3, 8 ⁇ is supported, then the length of the indication field is 2 bits.
  • the mapping relationship between the TPMI index indicated by the indication field indicating the precoding matrix and the precoding matrix in Table 1 is:
  • TPMI index i (i 1,1 )+N 1 O 1 (i 1,2 )+N 1 O 1 N 2 O 2 (i 2 ).
  • Table 1 Precoding matrix for layer 1 CSI report using antenna ports 3000 to 2999 + Channel State Information-Reference Signal (CSI-RS) port number
  • CSI-RS Channel State Information-Reference Signal
  • the mapping relationship between the TPMI index indicated by the indication field indicating the precoding matrix and the precoding matrix in Table 2, Table 3 or Table 4 respectively is:
  • TPMI index i (i 1,1 )+N 1 O 1 (i 1,2 )+N 1 O 1 N 2 O 2 (i 2 )+2N 1 O 1 N 2 O 2 (i 3 ).
  • Table 2 Precoding matrix for layer 2 CSI report using antenna ports 3000 to 2999 + CSI-RS port number
  • Table 3 Precoding matrix for layer 3 CSI report using antenna ports 3000 to 2999 + CSI-RS port number
  • Table 4 Precoding matrix for layer 4 CSI report using antenna ports 3000 to 2999 + CSI-RS port number
  • Table 6 Mapping of i 1,3 to k 1 and k 2 reported by layer 3 CSI when the number of CSI-RS ports is less than 16
  • the mapping relationship between the TPMI index indicated by the indication field indicating the precoding matrix and the precoding matrix in Table 7 or Table 8 respectively is:
  • Table 7 Precoding matrix for layer 5 CSI report using antenna ports 3000 to 2999 + CSI-RS port number
  • Table 8 Precoding matrix for 6-layer CSI report using antenna ports 3000 to 2999 + CSI-RS port number
  • the mapping relationship between the TPMI index indicated by the indication field indicating the precoding matrix and the precoding matrix in Table 9 or Table 10 is:
  • Table 9 Precoding matrix for layer 7 CSI report using antenna ports 3000 to 2999 + CSI-RS port number
  • Table 10 Precoding matrix for 8-layer CSI report using antenna ports 3000 to 2999 + CSI-RS port number
  • TPMI index i i 1,1 *i Number of 1,2 *i Number of 2 *Number of i 3 +i 1,2 *Number of i 2 *i Number of 3 +i 2 *Number of i 3 +i 3 ;
  • i 3 represents the offset of the DFT vector corresponding to different data streams.
  • the terminal supports the DFT-based Type I codebook, and the base station configures the DFT-based Type I codebook for the terminal.
  • the control signaling DCI contains two precoding indication fields, one of which is used for
  • the precoding matrix indication carries TPMI (i.e. DFT vector index) and another indication field for phase indication.
  • TPMI i.e. DFT vector index
  • Another indication field for phase indication is as follows:
  • Indication field used to indicate the precoding matrix This indication field jointly performs transmission rank and precoding matrix indication. This situation is the same as the specific application situation 1, and will not be described again here.
  • Indication field used for phase indication used for indication of coherent combined phase information, for example: 2 bits correspond to Quadrature Phase Shift Keying (QPSK), 3 bits correspond to octal phase shift keying (8 Phase Shift Keying, 8PSK).
  • QPSK Quadrature Phase Shift Keying
  • 8PSK octal phase shift keying
  • the terminal supports the DFT-based Type I codebook, and the base station configures the DFT-based Type I codebook for the terminal.
  • the control signaling DCI contains three precoding indication fields, one of which is used for indication.
  • the transmission rank an indication field used to indicate the precoding matrix corresponding to the indicated transmission rank, and an indication field used for phase indication.
  • the mapping relationship between the indication field and the specific precoding matrix is as follows:
  • Indication field used to indicate transmission rank For example: this field is 0 bits when the maximum rank is supported is 1, 1 bit is supported when the maximum rank is 2, and this field is 1 bit when the maximum rank is supported is 4. 2 bits, this field is 3 bits when the maximum rank is 8.
  • the length of the indication field is determined by the transmission rank restriction (rank restriction). For example: the maximum supported transmission rank is 8, but the base station is configured with a transmission rank restriction (rank restriction) of ⁇ 4, 5, 6, 7 ⁇ , that is It is said that only transmission ranks ⁇ 1, 2, 3, 8 ⁇ are supported, then the length of the indication field is 2 bits.
  • the mapping relationship between the TPMI index indicated by the indication field indicating the precoding matrix and the precoding matrix in Table 1 is:
  • TPMI index i (i 1,1 )+N 1 O 1 (i 1,2 ).
  • the mapping relationship between the TPMI index indicated by the indication field indicating the precoding matrix and the precoding matrix in Table 2, Table 3 or Table 4 respectively is:
  • TPMI index i (i 1,1 )+N 1 O 1 (i 1,2 )+2N 1 O 1 N 2 O 2 (i 3 ).
  • the TPMI index indicated by the indication field indicating the precoding matrix is the precoding matrix mapping in Table 7, Table 8, Table 9 or Table 10 respectively.
  • the relationship is:
  • TPMI index i number of i1,1*i1,2*number of i3+i1,2*number of i3+i3.
  • Indication field used for phase indication indication used for coherent combined phase information, for example: 2 bits correspond to QPSK, 3 bits correspond to 8PSK.
  • the terminal supports a third codebook composed of two different codebooks, and the base station configures this codebook for the terminal for uplink transmission.
  • the control signaling DCI contains two precoding indication fields, one of which The indication field indicates the precoding matrix corresponding to the first codebook and the corresponding rank is R1.
  • the other indication field indicates the precoding matrix corresponding to the second codebook and the corresponding rank is R2.
  • Some mathematical operation is used to obtain the third The final precoding matrix corresponding to each codebook.
  • the corresponding transmission rank is the rank value corresponding to the first codebook multiplied by the rank value corresponding to the second codebook, and the indicated total rank is R1 ⁇ R2.
  • the precoding indication field used to indicate the precoding matrix under a codebook the precoding index TPMI1 corresponding to codebook one.
  • codebook one is a 2-antenna codebook in the NR Rel-15 protocol, and the maximum supported rank is 2.
  • Precoding indication field used to indicate the precoding matrix under another codebook the precoding index TPMI2 corresponding to codebook two.
  • codebook one is a 4-antenna codebook in the NR Rel-15 protocol, supporting a maximum rank of 4 .
  • the third codebook is an 8-antenna codebook.
  • the base station indicates a 2-antenna precoding matrix (TPMI1) with rank 1 in the first precoding indication field, and a 4-antenna precoding matrix (TPMI2) with rank 3 in the second indication field.
  • TPMI1 2-antenna precoding matrix
  • TPMI2 4-antenna precoding matrix
  • the final precoding matrix is a 2-antenna codebook with rank 1 and a 4-antenna codebook with rank 3, which are obtained through a direct product (kronecker) operation.
  • the terminal supports a third codebook composed of two different codebooks, and the base station configures this codebook for the terminal for uplink transmission.
  • the control signaling DCI contains three precoding indication fields, one of which The indication field is used to indicate the transmission rank.
  • One indication field indicates the precoding matrix corresponding to the first codebook, and the other indication field indicates the precoding matrix corresponding to the second codebook.
  • a certain mathematical operation is used to obtain the third codebook.
  • the corresponding final precoding matrix is used to obtain the third codebook.
  • Indication field used to indicate transmission rank indicates the total transmission rank.
  • the size of the indication field is, for example: 0 bits when the maximum rank is supported is 1, 1 bit when the maximum rank is 2, 2 bits when the maximum rank is 4, and the maximum rank is 4. In the case of rank 8, this field is 3 bits.
  • the length of the indication field is determined by the transmission rank restriction (rank restriction), for example: the maximum supported transmission rank is 8, but the base station is configured with a transmission rank restriction (rank restriction) of ⁇ 4, 5, 6, 7 ⁇ , that is It is said that only transmission ranks ⁇ 1, 2, 3, 8 ⁇ are supported, then the length of the indication field is 2 bits.
  • the precoding indication field used to indicate the precoding matrix under a codebook the precoding index TPMI1 corresponding to codebook one.
  • codebook one is a 2-antenna codebook in the NR Rel-15 protocol, and the maximum supported rank is 2.
  • the precoding indication field used to indicate the precoding matrix under another codebook the precoding index TPMI2 corresponding to codebook two.
  • codebook one is a 4-antenna codebook in the NR Rel-15 protocol, supporting a maximum rank of 4 .
  • the third codebook is an 8-antenna codebook.
  • the precoding indication field used to indicate the precoding matrix under one codebook indicates the 2-antenna precoding matrix with rank 2 (TPMI1 )
  • the precoding indication field used to indicate the precoding matrix under another codebook indicates a 4-antenna precoding matrix with rank 3 (TPMI2)
  • the final precoding matrix is a 2-antenna codebook with rank 2 and rank
  • the 4-antenna codebook with rank 3 is obtained through direct product operation, and the total precoding matrix corresponds to the codebook with rank 6.
  • (X) is a direct product.
  • the first matrix on the left side of the equation is a kroneker matrix with 4 rows and 3 columns and a matrix with 2 rows and 2 columns; the right side of the equation is a matrix with 8 rows and 6 columns. Because the rank indicated this time is 5, the first 5 columns or the last 5 columns of precoding vectors of the precoding matrix are finally taken.
  • the terminal supports the DFT-based Type I codebook, and the base station configures the DFT-based Type I codebook for the terminal.
  • the control signaling DCI contains two precoding indication fields, one of which is used for indication.
  • the precoding matrix and another indication field jointly indicate the transmission rank and the corresponding phase.
  • the mapping relationship between the indication field and the specific precoding matrix is as follows:
  • Indication field that jointly indicates the transmission rank and corresponding phase: jointly indicates the transmission rank (RI) and coherent combined phase information, for example: the supported transmission ranks are ⁇ 1, 2, 3, 4 ⁇ ; the supported coherent combined phase corresponds QPSK Then the length of the indication field is 4 bits, with a total of 16 states. Each state indicates a transmission rank and coherent combination phase combination.
  • the mapping relationship between the TPMI index indicated by the indication field indicating the precoding matrix and the precoding matrix in Table 1 is:
  • TPMI index i (i 1,1 )+N 1 O 1 (i 1,2 ).
  • the mapping relationship between the TPMI index indicated by the indication field indicating the precoding matrix and the precoding matrix in Table 2, Table 3 or Table 4 respectively is:
  • TPMI index i (i 1,1 )+N 1 O 1 (i 1,2 )+2N 1 O 1 N 2 O 2 (i 3 ).
  • the TPMI index indicated by the indication field indicating the precoding matrix is the precoding matrix mapping in Table 7, Table 8, Table 9 or Table 10 respectively.
  • the relationship is:
  • TPMI index i number of i1,1*i1,2*number of i3+i1,2*number of i3+i3.
  • this embodiment of the present application provides a precoding matrix indication method, which includes:
  • Step 301 The network side device determines the indication method of the transmission precoding index TPMI in the downlink control information DCI;
  • Step 302 The network side device sends DCI to the terminal according to the instruction method, and the DCI carries TPMI instruction information.
  • the network side device determines the indication method of the transmission precoding index TPMI in the downlink control information DCI, including:
  • the network side device determines the indication method of TPMI in the DCI according to the codebook type corresponding to the codebook configured for the terminal, information related to the codebook, and the value of the supported transmission rank.
  • the method before the network side device sends DCI to the terminal according to the instruction method, the method further includes:
  • the network side device configures first information through high-level signaling.
  • the first information is used to indicate a first precoding matrix set that the terminal can use.
  • the first information includes at least one of the following: codebook type, and the Describes codebook-related information, transmission rank restrictions, and codebook subset constraints CBSR.
  • the network side device configures the first information through high-level signaling, it also includes:
  • the network side device sends second information to the terminal through the media access control layer control unit MAC CE.
  • the second information is used to indicate a second precoding matrix set, and the second precoding matrix set is the first A subset of the precoding matrix set.
  • the second information includes at least one of the following: a start index and a stop index of the precoding matrix; at least one set of precoding matrix indications; and a bit map.
  • the indication information of the TPMI is indicated through at least one precoding indication field.
  • the at least one precoding indication field includes at least one of the following:
  • a sixth precoding indication field that jointly indicates transmission rank and phase information
  • the at least one precoding indication field includes a first precoding indication field that jointly indicates the transmission rank and precoding matrix, or the at least one precoding indication field includes a first part of information indicating a codebook.
  • the first mapping relationship between the TPMI and the precoding matrix includes:
  • the precoding matrices corresponding to the same codebook under the same transmission rank are sorted respectively, and the precoding matrices are corresponding to the TPMI according to the sorting order.
  • the second mapping relationship between the TPMI and the precoding matrix includes:
  • the precoding matrices corresponding to the same codebook under all transmission ranks are uniformly sorted, and the precoding matrices are corresponding to the TPMI in the sorting order.
  • the at least one precoding indication field includes at least two fifth precoding indication fields that respectively indicate precoding matrices corresponding to different codebooks and a second precoding indication field that indicates transmission rank.
  • the transmission rank indicated by the second precoding indication field is less than or equal to the number of transmission layers that can be supported by the direct product operation result of at least two precoding matrices indicated by the fifth precoding indication field.
  • the method also includes:
  • the network side device receives the capability information sent by the terminal
  • the capability information includes information on at least one codebook for uplink transmission supported by the terminal.
  • the TPMI indication information is sent through DCI, so that the terminal determines the precoding matrix used for uplink data transmission according to the TPMI indication information, so that the TPMI indication can be accurately performed, Ensure the accurate determination of the precoding matrix used in uplink data transmission, thereby ensuring the accurate transmission of uplink data.
  • the execution subject may be a precoding matrix determination device.
  • the precoding matrix determination method performed by the precoding matrix determination apparatus is used as an example to illustrate the precoding matrix determination apparatus provided by the embodiment of the present application.
  • the precoding matrix determination device 400 in this embodiment of the present application is applied to a terminal and includes:
  • the first receiving module 401 is configured to receive downlink control information DCI sent by the network side device, where the DCI carries indication information of the transmission precoding index TPMI;
  • the first determination module 402 is configured to determine the precoding matrix used for uplink data transmission according to the indication information of the TPMI.
  • the indication information of the TPMI is indicated through at least one precoding indication field.
  • the at least one precoding indication field includes at least one of the following:
  • a sixth precoding indication field that jointly indicates transmission rank and phase information
  • the at least one precoding indication field includes a joint transmission rank and a third precoding matrix indication.
  • a precoding indication field or the at least one precoding indication field includes a seventh precoding indication field indicating the first part of information of a codebook and an eighth precoding indication field indicating the second part of information
  • the first A determination module 402 used for:
  • the precoding matrix used in uplink data transmission corresponding to the indication information of the TPMI
  • the first mapping relationship includes:
  • the precoding matrices corresponding to the same codebook under the same transmission rank are sorted respectively, and the precoding matrices are corresponding to the TPMI according to the sorting order.
  • the first determining module 402 is configured to:
  • the precoding matrix used in uplink data transmission corresponding to the indication information of the TPMI
  • the second mapping relationship includes:
  • the precoding matrices corresponding to the same codebook under all transmission ranks are uniformly sorted, and the precoding matrices are corresponding to the TPMI in the sorting order.
  • the first determination module 402 includes:
  • the precoding matrix used for uplink data transmission is determined.
  • the precoding matrix indicated by the at least two fifth precoding indication fields is directly product operation to determine the implementation method of the precoding matrix used for uplink data transmission, including:
  • the direct product operation result will be the same as the transmission rank indicated by the second precoding indication field.
  • Precoding vectors with the same rank and number of columns are used as the precoding matrix used for uplink data transmission.
  • the precoding vector with the same number of columns as the transmission rank indicated by the second precoding indication field is used as the precoding matrix used for uplink data transmission, include:
  • N is equal to the transmission rank indicated by the second precoding indication field.
  • the device also includes:
  • the second sending module is used to send capability information to the network side device
  • the capability information includes information on at least one codebook for uplink transmission supported by the terminal.
  • the first receiving module 401 before the first receiving module 401 receives the downlink control information DCI sent by the network side device, it also includes:
  • the second receiving module is configured to receive the first information sent by the network side device through high-level signaling.
  • the first information is used to indicate the first set of precoding matrices that the terminal can use.
  • the first information includes at least the following: One item: codebook type, information related to the codebook, transmission rank restriction, codebook subset constraint CBSR.
  • the second receiving module receives the first information sent by the network side device through high-level signaling, it also includes:
  • the third receiving module is configured to receive the second information sent by the network side device through the media access control layer control unit MAC CE.
  • the second information is used to indicate a second precoding matrix set.
  • the second precoding The matrix set is a subset of the first precoding matrix set.
  • the second information includes at least one of the following:
  • the start index and end index of the precoding matrix are The start index and end index of the precoding matrix
  • this device embodiment corresponds to the above-mentioned method, and all implementation methods in the above-mentioned method embodiment are applicable to this device embodiment, and the same technical effect can be achieved.
  • the precoding matrix determination device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip.
  • the electronic device may be a terminal or other devices other than the terminal.
  • terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.
  • the precoding matrix determination device provided by the embodiment of the present application can implement each process implemented by the method embodiment in Figure 2 and achieve the same technical effect. To avoid duplication, the details will not be described here.
  • Embodiments of the present application also provide a terminal, including a processor and a communication interface.
  • the communication interface is used to receive downlink control information DCI sent by a network side device.
  • the DCI carries indication information of the transmission precoding index TPMI; the processor uses Determine the precoding matrix used for uplink data transmission according to the indication information of the TPMI.
  • the indication information of the TPMI is indicated through at least one precoding indication field.
  • the at least one precoding indication field includes at least one of the following:
  • a sixth precoding indication field that jointly indicates transmission rank and phase information
  • the seventh precoding indication field indicating the first part of information of a codebook and the eighth precoding indication of the second part of information In the display area, the first part of information and the second part of information are used to determine the precoding matrix in the codebook.
  • the at least one precoding indication field includes a first precoding indication field that jointly indicates the transmission rank and precoding matrix, or the at least one precoding indication field includes a first part of information indicating a codebook.
  • the processor is configured to:
  • the precoding matrix used in uplink data transmission corresponding to the indication information of the TPMI
  • the first mapping relationship includes:
  • the precoding matrices corresponding to the same codebook under the same transmission rank are sorted respectively, and the precoding matrices are corresponding to the TPMI according to the sorting order.
  • the processor is configured to:
  • the precoding matrix used in uplink data transmission corresponding to the indication information of the TPMI
  • the second mapping relationship includes:
  • the precoding matrices corresponding to the same codebook under all transmission ranks are uniformly sorted, and the precoding matrices are corresponding to the TPMI in the sorting order.
  • the processor is configured to:
  • the precoding matrix used for uplink data transmission is determined.
  • the processor is configured to:
  • the direct product operation result will be the same as the transmission rank indicated by the second precoding indication field.
  • Precoding vectors with the same rank and number of columns are used as the precoding matrix used for uplink data transmission.
  • the processor is used for:
  • N is equal to the transmission rank indicated by the second precoding indication field.
  • the communication interface is used for:
  • the capability information includes information on at least one codebook for uplink transmission supported by the terminal.
  • the communication interface is also used for:
  • Receive first information sent by the network side device through high-level signaling the first information is used to indicate a first set of precoding matrices that the terminal can use, and the first information includes at least one of the following: codebook type, Information related to the codebook, transmission rank constraints, codebook subset constraints CBSR.
  • the communication interface is also used for:
  • the second information is used to indicate a second precoding matrix set, and the second precoding matrix set is the first A subset of the precoding matrix set.
  • the second information includes at least one of the following:
  • the start index and end index of the precoding matrix are The start index and end index of the precoding matrix
  • FIG. 5 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.
  • the terminal 500 includes but is not limited to: a radio frequency unit 501, a network module 502, an audio output unit 503, an input unit 504, a sensor 505, a display unit 506, a user input unit 507, an interface unit 508, a memory 509, a processor 510, etc. At least some parts.
  • the terminal 500 may also include a power supply (such as a battery) that supplies power to various components.
  • the power supply may be logically connected to the processor 510 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions.
  • the terminal structure shown in FIG. 5 does not constitute a limitation on the terminal.
  • the terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.
  • the input unit 504 may include a graphics processing unit (Graphics Processing Unit, GPU) 5041 and a microphone 5042.
  • the graphics processor 5041 is responsible for the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras).
  • the display unit 506 may include a display panel 5061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
  • the user input unit 507 includes a touch panel 5071 and at least one of other input devices 5072 . Touch panel 5071, also called touch screen.
  • the touch panel 5071 may include two parts: a touch detection device and a touch controller.
  • Other input devices 5072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.
  • the radio frequency unit 501 after receiving downlink data from the network side device, the radio frequency unit 501 can transmit it to the processor 510 for processing; in addition, the radio frequency unit 501 can send uplink data to the network side device.
  • the radio frequency unit 501 includes, but is not limited to, an antenna, amplifier, transceiver, coupler, low noise amplifier, duplexer, etc.
  • Memory 509 may be used to store software programs or instructions as well as various data.
  • the memory 509 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc.
  • save Memory 509 may include volatile memory or nonvolatile memory, or memory 509 may include both volatile and nonvolatile memory.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM).
  • RAM Random Access Memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM Double Data Rate SDRAM
  • DDRSDRAM double data rate synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM enhanced synchronous dynamic random access memory
  • Synch link DRAM synchronous link dynamic random access memory
  • SLDRAM direct memory bus
  • the processor 510 may include one or more processing units; optionally, the processor 510 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 510.
  • the radio frequency unit 501 is used for:
  • the processor 510 is configured to determine a precoding matrix used for uplink data transmission according to the indication information of the TPMI.
  • the indication information of the TPMI is indicated through at least one precoding indication field.
  • the at least one precoding indication field includes at least one of the following:
  • a sixth precoding indication field that jointly indicates transmission rank and phase information
  • the at least one precoding indication field includes a first precoding indication field that jointly indicates the transmission rank and precoding matrix, or the at least one precoding indication field includes a first part of information indicating a codebook.
  • the processor 510 is configured to:
  • the precoding matrix used in uplink data transmission corresponding to the indication information of the TPMI
  • the first mapping relationship includes:
  • the precoding matrices corresponding to the same codebook under the same transmission rank are sorted respectively, and the precoding matrices are corresponding to the TPMI according to the sorting order.
  • the processor 510 is configured to:
  • the precoding matrix used in uplink data transmission corresponding to the indication information of the TPMI
  • the second mapping relationship includes:
  • the precoding matrices corresponding to the same codebook under all transmission ranks are uniformly sorted, and the precoding matrices are corresponding to the TPMI in the sorting order.
  • the processor 510 is configured to:
  • the precoding matrix used for uplink data transmission is determined.
  • the processor is configured to:
  • the direct product operation result will be the same as the transmission rank indicated by the second precoding indication field.
  • Precoding vectors with the same rank and number of columns are used as the precoding matrix used for uplink data transmission.
  • the processor is used for:
  • N is equal to the transmission rank indicated by the second precoding indication field.
  • the radio frequency unit 501 is also used to:
  • the capability information includes information on at least one codebook for uplink transmission supported by the terminal.
  • the radio frequency unit 501 is also used to:
  • Receive first information sent by the network side device through high-level signaling the first information is used to indicate a first set of precoding matrices that the terminal can use, and the first information includes at least one of the following: codebook type, Information related to the codebook, transmission rank constraints, codebook subset constraints CBSR.
  • the radio frequency unit 501 is also used to:
  • the second information includes at least one of the following:
  • the start index and end index of the precoding matrix are The start index and end index of the precoding matrix
  • the embodiment of the present application also provides a terminal, including a processor, a memory, and a program or instruction stored in the memory and executable on the processor.
  • a terminal including a processor, a memory, and a program or instruction stored in the memory and executable on the processor.
  • the program or instruction is executed by the processor, the above-mentioned predetermined state is realized.
  • Each process of the embodiment of the coding matrix determination method can achieve the same technical effect. To avoid duplication, it will not be described again here.
  • Embodiments of the present application also provide a readable storage medium.
  • Programs or instructions are stored on the computer-readable storage medium.
  • the program or instructions are executed by a processor, each process of the above-mentioned precoding matrix determination method embodiment is implemented, and can To achieve the same technical effect, to avoid repetition, we will not repeat them here.
  • the computer-readable storage medium is such as read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
  • this embodiment of the present application also provides a precoding matrix indication device 600, which is applied to network side equipment, including:
  • the second determination module 601 is used to determine the indication mode of the transmission precoding index TPMI in the downlink control information DCI;
  • the first sending module 602 is configured to send DCI to the terminal according to the indication method, where the DCI carries TPMI indication information.
  • the second determination module 601 is used to:
  • the indication mode of TPMI in the DCI is determined according to the codebook type corresponding to the codebook configured for the terminal, information related to the codebook, and the value of the supported transmission rank.
  • the device before the first sending module 602 sends DCI to the terminal according to the instruction method, the device further includes:
  • a configuration module configured to configure first information through high-level signaling.
  • the first information is used to indicate a first set of precoding matrices that the terminal can use.
  • the first information includes at least one of the following: codebook type, and the Describes codebook-related information, transmission rank restrictions, and codebook subset constraints CBSR.
  • the configuration module configures the first information through high-level signaling, it also includes:
  • the third sending module is configured to send second information to the terminal through the media access control layer control unit MAC CE, where the second information is used to indicate a second precoding matrix set, and the second precoding matrix set is the A subset of the first set of precoding matrices.
  • the second information includes at least one of the following:
  • the start index and end index of the precoding matrix are The start index and end index of the precoding matrix
  • the indication information of the TPMI is indicated through at least one precoding indication field.
  • the at least one precoding indication field includes at least one of the following:
  • a sixth precoding indication field that jointly indicates transmission rank and phase information
  • the at least one precoding indication field includes a first precoding indication field that jointly indicates the transmission rank and precoding matrix, or the at least one precoding indication field includes a first part of information indicating a codebook.
  • the first mapping relationship between the TPMI and the precoding matrix includes:
  • the precoding matrices corresponding to the same codebook under the same transmission rank are sorted respectively, and the precoding matrices are corresponding to the TPMI according to the sorting order.
  • the second mapping relationship between the TPMI and the precoding matrix includes:
  • the precoding matrices corresponding to the same codebook under all transmission ranks are uniformly sorted, and the precoding matrices are corresponding to the TPMI in the sorting order.
  • the at least one precoding indication field includes at least two fifth precoding indication fields that respectively indicate precoding matrices corresponding to different codebooks and a second precoding indication field that indicates transmission rank.
  • the transmission rank indicated by the second precoding indication field is less than or equal to the number of transmission layers that can be supported by the direct product operation result of at least two precoding matrices indicated by the fifth precoding indication field.
  • the device also includes:
  • the fourth receiving module is used to receive the capability information sent by the terminal;
  • the capability information includes information on at least one codebook for uplink transmission supported by the terminal.
  • this device embodiment is a device corresponding to the above-mentioned method. All implementation methods in the above-mentioned method embodiment are applicable to this device embodiment and can achieve the same technical effect, which will not be described again here.
  • An embodiment of the present application also provides a network side device, including a processor and a communication interface, wherein the processor is used to determine the indication mode of the transmission precoding index TPMI in the downlink control information DCI;
  • the communication interface is configured to send DCI to the terminal according to the indication method, where the DCI carries indication information of TPMI.
  • the processor is used for:
  • the indication mode of TPMI in the DCI is determined according to the codebook type corresponding to the codebook configured for the terminal, information related to the codebook, and the value of the supported transmission rank.
  • the communication interface is also used for:
  • First information is configured through high-level signaling, and the first information is used to indicate the first set of precoding matrices that the terminal can use.
  • the first information includes at least one of the following: codebook type, codebook-related Information, transmission rank constraint, codebook subset constraint CBSR.
  • the communication interface is also used for:
  • the second information is sent to the terminal through the media access control layer control unit MAC CE.
  • the second information is used to indicate a second precoding matrix set.
  • the second precoding matrix set is the first precoding matrix set. Subset.
  • the second information includes at least one of the following: a start index and a stop index of the precoding matrix; at least one set of precoding matrix indications; and a bit map.
  • the indication information of the TPMI is indicated through at least one precoding indication field.
  • the at least one precoding indication field includes at least one of the following:
  • a sixth precoding indication field that jointly indicates transmission rank and phase information
  • the at least one precoding indication field includes a first precoding indication field that jointly indicates the transmission rank and precoding matrix, or the at least one precoding indication field includes a first part of information indicating a codebook.
  • the first mapping relationship between the TPMI and the precoding matrix includes:
  • the precoding matrices corresponding to the same codebook under the same transmission rank are sorted respectively, and the precoding matrices are corresponding to the TPMI according to the sorting order.
  • the second mapping relationship between the TPMI and the precoding matrix includes:
  • the precoding matrices corresponding to the same codebook under all transmission ranks are uniformly sorted, and the precoding matrices are corresponding to the TPMI in the sorting order.
  • the at least one precoding indication field includes precoding matrix indications corresponding to different codebooks.
  • the transmission rank indicated by the second precoding indication field is less than or equal to at least two fifth precoding indications. The number of transmission layers that can be supported by the direct product operation result of the precoding matrix indicated by the field.
  • the communication interface is used for:
  • the capability information includes information on at least one codebook for uplink transmission supported by the terminal.
  • the embodiment of the present application also provides a network-side device, including a processor, a memory, and a program or instruction stored in the memory and executable on the processor.
  • a network-side device including a processor, a memory, and a program or instruction stored in the memory and executable on the processor.
  • the program or instruction is executed by the processor, the above is implemented.
  • the precoding matrix indicates each process of the method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.
  • the embodiment of the present application also provides a network side device.
  • the network side device 700 includes: an antenna 701 , a radio frequency device 702 , a baseband device 703 , a processor 704 and a memory 705 .
  • the antenna 701 is connected to the radio frequency device 702 .
  • the radio frequency device 702 receives information through the antenna 701 and sends the received information to the baseband device 703 for processing.
  • the baseband device 703 processes the information to be sent and sends it to the radio frequency device 702.
  • the radio frequency device 702 processes the received information and then sends it out through the antenna 701.
  • the method performed by the network side device in the above embodiment can be implemented in the baseband device 703, which includes a baseband processor.
  • the baseband device 703 may include, for example, at least one baseband board on which multiple chips are disposed, as shown in FIG. Program to perform the network-side device operations shown in the above method embodiments.
  • the network side device may also include a network interface 706, which is, for example, a common public radio interface (CPRI).
  • a network interface 706, which is, for example, a common public radio interface (CPRI).
  • CPRI common public radio interface
  • the network side device 700 in this embodiment of the present invention also includes: instructions or programs stored in the memory 705 and executable on the processor 704.
  • the processor 704 calls the instructions or programs in the memory 705 to execute each of the steps shown in Figure 6. The method of module execution and achieving the same technical effect will not be described in detail here to avoid duplication.
  • Embodiments of the present application also provide a readable storage medium.
  • Programs or instructions are stored on the readable storage medium.
  • the program or instructions are executed by a processor, each process of the above-mentioned precoding matrix indication method embodiment is implemented, and can To achieve the same technical effect, to avoid repetition, we will not repeat them here.
  • the processor is the processor in the network side device described in the above embodiment.
  • the readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.
  • this embodiment of the present application also provides a communication device 800, which includes a processor 801 and a memory 802.
  • the memory 802 stores programs or instructions that can be run on the processor 801, for example.
  • the communication device 800 is a terminal
  • the program or instruction is executed by the processor 801
  • each step of the above-mentioned precoding matrix determination method embodiment is implemented, and the same technical effect can be achieved.
  • the communication device 800 is a network-side device
  • the program may refer to When executed by the processor 801, each step of the above-mentioned precoding matrix indication method embodiment is implemented and the same technical effect can be achieved. To avoid duplication, the details are not repeated here.
  • An embodiment of the present application further provides a chip.
  • the chip includes a processor and a communication interface.
  • the communication interface is coupled to the processor.
  • the processor is used to run programs or instructions to implement the above precoding matrix determination method or
  • the precoding matrix indicates each process of the method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.
  • chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.
  • Embodiments of the present application further provide a computer program/program product.
  • the computer program/program product is stored in a storage medium.
  • the computer program/program product is executed by at least one processor to implement the above precoding matrix determination method. Or the various processes of the precoding matrix indication method embodiment, and can achieve the same technical effect, so to avoid repetition, they will not be described again here.
  • Embodiments of the present application also provide a communication system, including: a terminal and a network side device.
  • the terminal can be used to perform the steps of the precoding matrix determination method as described above.
  • the network side device can be used to perform the above steps.
  • the precoding matrix indicates the steps of the method.
  • the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation.
  • the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology.
  • the computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande a trait au domaine technique des communications. Sont divulgués un procédé et un appareil d'indication de matrice de précodage, un procédé et un appareil de détermination de matrice de précodage, ainsi qu'un dispositif côté réseau et un terminal. Le procédé d'indication de matrice de précodage dans les modes de réalisation de la présente demande comprend les étapes suivantes : un dispositif côté réseau détermine un mode d'indication d'un indicateur de matrice de précodage de transmission (TPMI) dans des informations de commande de liaison descendante (DCI) ; et le dispositif côté réseau envoie les DCI à un terminal selon le mode d'indication, les DCI transportant des informations d'indication du TPMI.
PCT/CN2023/103278 2022-07-04 2023-06-28 Procédé et appareil d'indication de matrice de précodage, procédé et appareil de détermination de matrice de précodage, et dispositif côté réseau et terminal WO2024007918A1 (fr)

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CN202210786968.6 2022-07-04
CN202210786968.6A CN117411522A (zh) 2022-07-04 2022-07-04 预编码矩阵指示、确定方法、装置、网络侧设备及终端

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108809386A (zh) * 2017-05-05 2018-11-13 华为技术有限公司 传输预编码矩阵的指示方法和设备
WO2019095620A1 (fr) * 2017-11-17 2019-05-23 华为技术有限公司 Procédé de communication, terminal et station de base
US20200083939A1 (en) * 2017-03-31 2020-03-12 Lg Electronics Inc. Wireless communication system enhancement link data transfer method and apparatus thereof
CN113824481A (zh) * 2020-06-19 2021-12-21 华为技术有限公司 上行传输方法及相关装置
WO2022005114A1 (fr) * 2020-06-30 2022-01-06 엘지전자 주식회사 Procédé et appareil permettant de transmettre et de recevoir un canal de liaison montante dans un système de communication sans fil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200083939A1 (en) * 2017-03-31 2020-03-12 Lg Electronics Inc. Wireless communication system enhancement link data transfer method and apparatus thereof
CN108809386A (zh) * 2017-05-05 2018-11-13 华为技术有限公司 传输预编码矩阵的指示方法和设备
WO2019095620A1 (fr) * 2017-11-17 2019-05-23 华为技术有限公司 Procédé de communication, terminal et station de base
CN113824481A (zh) * 2020-06-19 2021-12-21 华为技术有限公司 上行传输方法及相关装置
WO2022005114A1 (fr) * 2020-06-30 2022-01-06 엘지전자 주식회사 Procédé et appareil permettant de transmettre et de recevoir un canal de liaison montante dans un système de communication sans fil

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