WO2023160442A1 - Procédé de rapport de csi, procédé de prédiction de canal, terminal et dispositif du côté réseau - Google Patents

Procédé de rapport de csi, procédé de prédiction de canal, terminal et dispositif du côté réseau Download PDF

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Publication number
WO2023160442A1
WO2023160442A1 PCT/CN2023/076146 CN2023076146W WO2023160442A1 WO 2023160442 A1 WO2023160442 A1 WO 2023160442A1 CN 2023076146 W CN2023076146 W CN 2023076146W WO 2023160442 A1 WO2023160442 A1 WO 2023160442A1
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Prior art keywords
orthogonal basis
domain
doppler
basis vector
basis vectors
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PCT/CN2023/076146
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English (en)
Chinese (zh)
Inventor
任千尧
袁江伟
刘昊
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维沃移动通信有限公司
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Publication of WO2023160442A1 publication Critical patent/WO2023160442A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/373—Predicting channel quality or other radio frequency [RF] parameters
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • the present application belongs to the field of communication technology, and specifically relates to a channel state information (Channel State Information, CSI) reporting method, a channel prediction method, a terminal and a network side device.
  • CSI Channel State Information
  • the state of the channel will change with time, and the conventional CSI feedback cannot keep up with the change of the channel, for example: between two adjacent CSI feedbacks, at this time, the network side device does not obtain new CSI feedback , the channel state can only be estimated according to the previous CSI feedback. However, when the channel has changed between two adjacent CSI feedbacks, if the network side device continues to estimate the channel state according to the previous CSI feedback, it will cause The channel estimation result does not match the actual state of the channel, thereby degrading communication performance.
  • the embodiment of the present application provides a CSI reporting method, a channel prediction method, a terminal, and a network-side device, so that the terminal can report a codebook of Doppler information reflecting channel changes over time, so that the network-side device can Changes in the channel to predict the channel state in a subsequent period of time, thereby improving communication performance.
  • a method for reporting CSI includes:
  • the terminal selects at least two sets of orthogonal basis vectors according to the channel state information reference signal CSI-RS of at least two symbols transmitted on the target downlink channel, and each set of orthogonal basis vectors includes a Doppler domain orthogonal basis vectors, or each set of orthogonal basis vectors includes 1 Doppler domain orthogonal basis vector and also includes at least one of the following: 1 space domain orthogonal basis vector and 1 frequency domain orthogonal basis vector, so The at least two symbols correspond to N 4 time-domain sampling points, and N 4 is an integer greater than 1;
  • the terminal sends a CSI report to the network side device, the CSI report includes first indication information and second indication information, and the first indication information includes each orthogonal basis vector in the at least two orthogonal basis vector groups
  • the identification information of the second indication information includes at least one of the following: the coefficient of each orthogonal basis vector in the at least two orthogonal basis vector groups and the combination of at least two orthogonal basis vectors coefficient.
  • a CSI reporting device which is applied to a terminal, and the device includes:
  • the selection module is configured to select at least two sets of orthogonal basis vectors according to the channel state information reference signal CSI-RS of at least two symbols transmitted on the target downlink channel, and each set of orthogonal basis vectors includes 1 Doppler Orthogonal basis vectors in Le domain, or each set of orthogonal basis vectors includes 1 Doppler domain orthogonal basis vector and also includes at least one of the following: 1 spatial domain orthogonal basis vector and 1 frequency domain orthogonal basis vector A base vector, the at least two symbols correspond to N 4 time-domain sampling points, and N 4 is an integer greater than 1;
  • a first sending module configured to send a CSI report to a network side device, where the CSI report includes first indication information and second indication information, and the first indication information includes each of the at least two orthogonal basis vector groups Orthogonal basis vector identification information, the second indication information includes at least one of the following: the coefficient of each orthogonal basis vector in the at least two orthogonal basis vector groups and the combination coefficient of at least two orthogonal basis vectors .
  • a channel prediction method comprising:
  • the network side device sends a channel state information reference signal CSI-RS to the terminal through at least two symbols on the target downlink channel, the at least two symbols correspond to N 4 sampling points in the time domain, and N 4 is an integer greater than 1;
  • the network-side device receives a CSI report from the terminal, the CSI report includes first indication information and second indication information, and the first indication information includes each orthogonal basis in at least two orthogonal basis vector groups Vector identification information, the second indication information includes at least one of the following: the coefficient of each orthogonal basis vector in the at least two orthogonal basis vector groups and the combination coefficient of at least two orthogonal basis vectors, the Each of the at least two sets of orthogonal basis vectors includes a Doppler-domain orthogonal basis vector, or each of the sets of orthogonal basis vectors includes a Doppler-domain orthogonal basis vector And also include at least one of the following: 1 spatial domain orthogonal basis vector and 1 frequency domain orthogonal basis vector;
  • the network side device predicts the channel state information of the target downlink channel according to the CSI report.
  • a channel prediction device which is applied to a network side device, and the device includes:
  • the second sending module is configured to send the channel state information reference signal CSI-RS to the terminal through at least two symbols on the target downlink channel, the at least two symbols correspond to N 4 time domain sampling points, and N 4 is greater than 1 integer;
  • the first receiving module is configured to receive a CSI report from the terminal, the CSI report includes first indication information and second indication information, and the first indication information includes each of at least two orthogonal basis vector groups
  • the identification information of the orthogonal basis vector, the second indication information includes at least one of the following: the coefficient of each orthogonal basis vector in the at least two orthogonal basis vector groups and the combination coefficient of at least two orthogonal basis vectors,
  • Each of the at least two sets of orthogonal basis vectors includes a Doppler-domain orthogonal basis vector, or each of the sets of orthogonal basis vectors includes a Doppler-domain orthogonal
  • the orthogonal basis vectors also include at least one of the following: 1 spatial domain orthogonal basis vector and 1 frequency domain orthogonal basis vector;
  • a channel prediction module configured to predict channel state information of the target downlink channel according to the CSI report.
  • a terminal in a fifth aspect, includes a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, the following The steps of the method in one aspect.
  • a terminal including a processor and a communication interface, wherein the processor is configured to select at least two positive Orthogonal basis vector groups, each of which includes 1 Doppler domain orthogonal basis vector, or each of the orthogonal basis vector groups includes 1 Doppler domain orthogonal basis vector and also includes At least one of the following: 1 space-domain orthogonal basis vector and 1 frequency-domain orthogonal basis vector, the at least two symbols correspond to N 4 time-domain sampling points, N 4 is an integer greater than 1, and the communication interface uses For sending a CSI report to the network side device, the CSI report includes first indication information and second indication information, and the first indication information includes an identifier of each orthogonal basis vector in the at least two orthogonal basis vector groups Information, the second indication information includes at least one of the following: coefficients of each orthogonal basis vector in the at least two sets of orthogonal basis vectors and combination coefficients of at least two orthogonal basis vectors.
  • a network-side device in a seventh aspect, includes a processor and a memory, the memory stores programs or instructions that can run on the processor, and the programs or instructions are executed by the processor When realizing the steps of the method as described in the third aspect.
  • a network side device including a processor and a communication interface, wherein the communication interface is used to send a channel state information reference signal CSI-RS to a terminal through at least two symbols on a target downlink channel, so The at least two symbols correspond to N 4 sampling points in the time domain, where N 4 is an integer greater than 1, and receive a CSI report from the terminal, the CSI report includes first indication information and second indication information, and the first indication information
  • the indication information includes identification information of each orthogonal basis vector in at least two sets of orthogonal basis vectors
  • the second indication information includes at least one of the following items: each of the at least two sets of orthogonal basis vectors is orthogonal
  • each of the at least two sets of orthogonal basis vectors is orthogonal
  • the coefficients of the basis vectors and the combination coefficients of at least two orthogonal basis vectors, each of the at least two orthogonal basis vector groups includes 1 Doppler domain orthogonal basis vector, or each The set of orthogonal basis vectors includes 1 Doppler domain
  • a ninth aspect provides a wireless communication system, including: a terminal and a network-side device, the terminal can be used to perform the steps of the CSI reporting method described in the first aspect, and the network-side device can be used to perform the steps of the third The steps of the channel prediction method described in the aspect.
  • a readable storage medium is provided, and a program or Instructions, when the program or instructions are executed by the processor, implement the steps of the method described in the first aspect, or implement 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, and the processor is used to run a program or an instruction to implement the method described in the first aspect. method, or implement the 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 The steps of the CSI reporting method, or the steps of realizing the channel prediction method as described in the third aspect.
  • the terminal selects at least two orthogonal basis vector groups according to the channel state information reference signal CSI-RS of at least two symbols transmitted on the target downlink channel, and each of the orthogonal basis vector groups includes 1 Doppler domain orthogonal basis vectors, or each set of orthogonal basis vectors includes 1 Doppler domain orthogonal basis vector and also includes at least one of the following: 1 space domain orthogonal basis vector and 1 frequency domain Domain orthogonal basis vector, the at least two symbols correspond to N 4 time domain sampling points, N 4 is an integer greater than 1; the terminal sends a CSI report to the network side device, and the CSI report includes the first indication information and The second indication information, the first indication information includes identification information of each orthogonal base vector in the at least two orthogonal base vector groups, and the second indication information includes at least one of the following: the at least two The coefficient of each orthogonal basis vector in the set of orthogonal basis vectors and the combination coefficient of at least two orthogonal basis vectors.
  • the first indication information includes identification information of each ortho
  • FIG. 1 is a schematic structural diagram of a wireless communication system to which an embodiment of the present application can be applied;
  • FIG. 2 is a flow chart of a CSI reporting method provided by an embodiment of the present application.
  • FIG. 3 is a flow chart of a channel prediction method provided in an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a CSI reporting device provided in an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a channel prediction device provided in an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a hardware structure of a terminal provided in an embodiment of the present application.
  • Fig. 8 is a schematic structural diagram of a network side device provided by an embodiment of the present application.
  • first, second and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein and that "first" and “second” distinguish objects. It is usually one category, and the number of objects is not limited. For example, there may be one or more first objects.
  • “and/or” in the description and claims means at least one of the connected objects, and the character “/” generally means that the related objects are an "or” relationship.
  • LTE Long Term Evolution
  • LTE-Advanced LTE-Advanced
  • LTE-A Long Term Evolution-Advanced
  • 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
  • system and “network” in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned system and radio technology, and can also be used for other systems and radio technologies.
  • NR New Radio
  • the following description describes the New Radio (NR) system for illustrative purposes, and uses NR terminology in most of the following descriptions, but these techniques can also be applied to applications other than NR system applications, such as the 6th generation (6 th Generation, 6G) communication system.
  • 6G 6th Generation
  • Fig. 1 shows a block diagram of a wireless communication system to which the embodiment of the present application is 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 computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, a super mobile personal computer (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) equipment, robot, wearable device (Wearable Device) , Vehicle User Equipment (VUE), 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 (personal computer, PC), teller machine or self-service machine and other terminal side devices, wearable devices include: smart watches, smart bracelet
  • the network side device 12 may include an access network device or a core network device, where the access network device 12 may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function, or Wireless access network unit.
  • RAN Radio Access Network
  • RAN Radio Access Network
  • Wireless access network unit Wireless access network unit
  • the access network device 12 may include a base station, a wireless local area network (Wireless Local Area Networks, WLAN) access point or a WiFi node, etc., and the base station may be called a node B, an evolved node B (eNB), an access point, or a base transceiver station (Base Transceiver Station, BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (Extended Service Set, ESS), Home Node B, Home Evolved Node B, sending and receiving point (Transmitting Receiving Point, TRP) or some other appropriate term 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 the NR system The base station in the example is introduced as an example, and the specific type of the base station is not limited.
  • the transmitting end can optimize the signal transmission according to the CSI so that it can better match the channel state.
  • CQI Channel Quality Indicator
  • MCS Modulation and Coding Scheme
  • PMI Precoding Matrix Indicator
  • MIMO Multi-Input Multi-Output
  • the network-side device sends CSI reference signals (CSI-Reference Signals, CSI-RS) on some time-frequency resources of a certain slot (slot), and the terminal performs channel estimation based on the CSI-RS, and calculates the channel on this slot Information, the PMI is fed back to the base station through the codebook, and the network-side device combines the channel information according to the codebook information fed back by the terminal, and before the terminal reports CSI next time, the network-side device uses this channel information to perform data precoding and multi-user scheduling .
  • CSI-RS CSI-Reference Signals
  • the terminal can change the PMI reported by each subband to report the PMI according to the delay (delay domain, that is, the frequency domain). Since the channel in the delay domain is more concentrated, it can be approximated with less delay PMI The PMI of all subbands can be regarded as reporting after compressing the delay field information.
  • the network side device can precode the CSI-RS in advance and send the coded CSI-RS to the terminal.
  • the terminal sees the channel corresponding to the coded CSI-RS.
  • the terminal only needs to Select several ports with higher strength from the ports indicated by the network side device, and report the coefficients corresponding to these ports.
  • the information used by the network side device for CSI-RS precoding is angle information and delay information, and the network side device can use the uplink sounding reference signal (Sounding Reference Signal, SRS) to obtain this information, or through the previously reported PMI.
  • SRS Sounding Reference Signal
  • the channel information at a certain moment is phase information, which is rapidly changing information.
  • the network side equipment cannot obtain it through other methods and needs to be reported by the terminal. Therefore, the terminal only needs to report the phase information. Yes, thereby reducing the overhead and processing complexity of CSI feedback.
  • the network-side device sends CSI-RS, and the terminal receives and selects 2L space-domain orthogonal basis vectors (abbreviated as space-domain orthogonal basis, which can also be called angle-domain orthogonal basis), select M v frequency-domain orthogonal basis vectors (which can also be referred to as time-delay (delay) domain orthogonal basis or), and the terminal reports the selected orthogonal basis and corresponding coefficients, and the network side device can The channel is recovered according to the orthogonal base and the coefficient corresponding to the orthogonal base.
  • space-domain orthogonal basis which can also be called angle-domain orthogonal basis
  • M v frequency-domain orthogonal basis vectors which can also be referred to as time-delay (delay) domain orthogonal basis or
  • the conventional CSI feedback can no longer keep up with the change of the channel.
  • the CSI codebook is made compatible by making the terminal report the Doppler domain orthogonal basis vector. Doppler information that can reflect channel changes over time, so that the network-side device can predict the channel state in a subsequent period of time based on the Doppler-domain orthogonal basis vector, so that the network-side device can then use the information reported by the terminal.
  • the channel recovered by the orthogonal base and the coefficient corresponding to the orthogonal base matches the actual channel state of the channel more closely.
  • the CSI reporting method provided by the embodiment of the present application may be executed by a terminal, which may be the type of terminal listed in the embodiment shown in Figure 1, or may also include other types of The terminal is not specifically limited here. As shown in Figure 2, the CSI reporting method may include the following steps:
  • Step 201 the terminal selects at least two orthogonal basis vector groups according to the CSI-RS of at least two symbols transmitted on the target downlink channel, and each of the orthogonal basis vector groups includes one Doppler domain orthogonal basis vector , or each set of orthogonal basis vectors includes 1 Doppler domain orthogonal basis vector and also includes at least one of the following: 1 space domain orthogonal basis vector and 1 frequency domain orthogonal basis vector, the at least The two symbols correspond to N 4 sampling points in the time domain, where N 4 is an integer greater than 1.
  • the foregoing CSI-RS may be a precoded CSI-RS sent by a network side device.
  • the aforementioned sampling points in the time domain may be sampling points for detecting orthogonal basis vectors.
  • the at least two symbols corresponding to N 4 time-domain sampling points can be expressed as: taking N 4 time-domain sampling points on the time-domain resources of at least two symbols, each time-domain sampling point estimates a group of channel matrices, and each A set of channel matrices specifically refers to a channel matrix of N3 frequency domain sampling points corresponding to the time domain sampling point or a channel matrix of multiple subbands in the frequency domain corresponding to the time domain sampling point.
  • the terminal can select the orthogonal basis vectors in the air domain, frequency domain, and Doppler domain from the N 4 sets of channel matrices.
  • the network side device only uses certain time-frequency resources of a slot
  • the CSI-RS is sent on the network, and the terminal only selects K 1 space-domain orthogonal bases and M frequency-domain orthogonal bases for the received CSI-RS of 1 symbol, that is, the terminal determines K 1 ⁇ M space-frequency domain orthogonal bases Base pair, it can be seen that the codebook determined by the terminal cannot carry Doppler domain information.
  • the terminal selects at least two sets of orthogonal basis vectors for the received CSI-RS of at least two symbols, and each set of orthogonal basis vectors includes one Doppler domain orthogonal basis vector, or Each set of orthogonal basis vectors includes 1 Doppler domain orthogonal basis vector and also includes at least one of the following: 1 space domain orthogonal basis vector and 1 frequency domain orthogonal basis vector, so that the terminal can be based on
  • the channel estimation of the CSI-RS of at least two symbols obtains the Doppler domain information reflecting the change of the target downlink channel with time, and jointly determines the PMI sequence number according to the Doppler domain information, the air domain information and the frequency domain information, That is, the codebook in the embodiment of the present application takes Doppler domain information into consideration.
  • Step 202 the terminal sends a CSI report to the network side device, the CSI report includes first indication information and second indication information, and the first indication information includes each of the at least two orthogonal basis vector groups
  • the identification information of the orthogonal basis vectors, the second indication information includes at least one of the following: the coefficient of each orthogonal basis vector in the at least two sets of orthogonal basis vectors and the combination coefficient of the at least two orthogonal basis vectors.
  • the second indication information may include coefficients of the Doppler domain orthogonal basis vector
  • the coefficients of the Doppler domain orthogonal basis vector can indicate the time-varying characteristics of the target downlink channel.
  • the second indication information may include the coefficient of each orthogonal basis vector and/or the combination coefficient of at least two orthogonal basis vectors, wherein the combination coefficient may be that at least two orthogonal basis vectors correspond to The coefficients of the orthogonal basis vector pairs for .
  • the second indication information may include any of the following:
  • the second indication information may also include the coefficients of each spatial domain orthogonal basis vector, the coefficients of the Doppler domain-frequency domain orthogonal basis vector pair, etc., that is, each orthogonal basis vector group includes an independent orthogonal basis vector, the other two orthogonal basis vectors form an orthogonal basis vector pair, so that the second indication information includes the coefficients of each independent orthogonal basis vector and the coefficient of each orthogonal basis vector pair, which are not exhaustive here .
  • the coefficients of the space-domain orthogonal basis vector and the coefficients of the frequency-domain orthogonal basis vector are used to indicate the space domain and frequency domain information of the target downlink channel, so that the coefficients in the second indication information can be used to indicate the target downlink channel over time.
  • the CSI report reported by the above-mentioned terminal includes PMI
  • the above-mentioned first indication information and second indication information may be information in the PMI (for example: the first indication information is used to indicate the identification information of the orthogonal basis vector, which may be The orthogonal basis vector is identified by the position of each orthogonal basis vector carried in the PMI), and based on the PMI, the terminal and the network side device can determine a precoding matrix in the codebook.
  • the network side device can predict the channel state of the target downlink channel in the next period of time according to the PMI, in this way, while reducing the overhead of the terminal and the network-side device based on precoding, the codebook can also be compatible with the Doppler domain information, so that the network-side device can receive the CSI report based on the information in this CSI report.
  • PMI is used to predict the channel state of the target downlink channel in the next period of time, and select an appropriate modulation and coding scheme according to the predicted channel state, or to maximize the strength of the received signal, or to suppress interference, etc. In scenarios where time changes, communication performance is improved.
  • the terminal selects at least two orthogonal basis vector groups according to the CSI-RS of at least two symbols transmitted on the target downlink channel, including:
  • the terminal selects K 1 space-domain orthogonal basis vectors and M frequency-domain orthogonal basis vectors according to the CSI-RS of at least two symbols transmitted on the target downlink channel to obtain K 1 ⁇ M space-frequency domain orthogonal pair of basis vectors;
  • the terminal selects M 1 Doppler domain orthogonal basis vectors for each of the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs, and obtains K 1 ⁇ M ⁇ M 1 orthogonal basis vectors vector group;
  • the K 1 is the number of space domain orthogonal vector bases indicated by the network side equipment
  • the M is the number of frequency domain orthogonal vector bases indicated by the network side equipment
  • the M 1 is the Doppler frequency domain indicated by the network side equipment.
  • the number of Le field orthogonal vector bases, K 1 , M and M 1 are respectively positive integers.
  • the above terminal selects K 1 space-domain orthogonal basis vectors and M frequency-domain orthogonal basis vectors according to the CSI-RS of at least two symbols transmitted on the target downlink channel to obtain K 1 ⁇ M space-frequency
  • the domain orthogonal basis vector pair can be under the communication protocol R16 codebook structure in the related art
  • the network side device sends the CSI-RS
  • the terminal receives and selects 2L space domain orthogonal basis vectors (abbreviated as space domain orthogonal basis)
  • space domain orthogonal basis abbreviated as space domain orthogonal basis
  • One time-domain sampling point of the CSI report corresponds to one symbol, one part of a symbol (that is, one symbol is sampled at least twice, for example: every half symbol is sampled once) , at least two symbols or time domain bits of at least one CSI-RS resource (resource) place.
  • a time-domain sampling point corresponds to at least two symbols, it is considered that within the at least two symbols, the channel will not change (that is, when the interval between at least two symbols is short and the channel state changes little, The at least two symbols can be regarded as one time instant to calculate CSI).
  • the N 4 time-domain sampling points correspond to at least two symbols.
  • one time-domain sampling point corresponds to one symbol as an example for illustration, that is, it is assumed that N 4 time-domain sampling points correspond to N 4 symbols.
  • M1 Doppler domain orthogonal basis vectors are also selected correspondingly.
  • K 1 , M and M 1 may be stipulated in the protocol, or determined according to an instruction of the network side device, and are not specifically limited here.
  • K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs may be indicated by the network side device, or selected by the terminal within the range indicated by the network side device, which is not specifically limited here.
  • K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs are selected first, and then M 1 Doppler domain orthogonal basis vectors are selected for each space domain-frequency domain orthogonal basis vector pair, which can simplify The process of selecting K 1 ⁇ M ⁇ M 1 orthogonal basis vector groups.
  • the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs are jointly selected according to the N 4 time domain sampling points.
  • the joint selection of the N 4 time-domain sampling points may be adding the second-order matrix of the N 4 time-domain sampling points, and according to The result after the addition selects K 1 ⁇ M pairs of orthogonal basis vectors in the space domain-frequency domain.
  • N 4 sampling points in the time domain can jointly select K 1 ⁇ M orthogonal basis vector pairs in the space domain and frequency domain.
  • the K 1 ⁇ M space-frequency domain orthogonal basis vector pairs are the space-frequency domain orthogonal basis vector pairs corresponding to each of the N 4 time-domain sampling points
  • the preset airspace-frequency domain orthogonal basis vector pair, the preset airspace-frequency domain orthogonal basis vector pair includes:
  • the aforementioned preset time domain sampling point may be a time domain sampling point whose time domain position is at the first position among the N 4 time domain sampling points or a time domain sampling point arranged at other preset time domain positions .
  • the terminal only needs to measure the K 1 ⁇ M space-frequency domain orthogonal basis vectors corresponding to the time-domain sampling point, thereby reducing the calculation amount of the terminal.
  • M 1 same Doppler-domain orthogonal basis vectors can be selected for each space-frequency domain orthogonal basis vector pair, Or select M 1 different Doppler domain orthogonal basis vectors for each space domain-frequency domain orthogonal basis vector pair respectively, in This is not specifically limited.
  • the terminal can report all the selected orthogonal basis vectors and the coefficients of each orthogonal basis vector, that is, report K 1 ⁇ M ⁇ M 1 Orthogonal basis vector group and K 1 ⁇ M ⁇ M 1 coefficients; or, the terminal can only report the non-zero coefficients (that is, the coefficients whose amplitude value is not equal to 0) among the K 1 ⁇ M ⁇ M 1 coefficients, and the Orthogonal basis vectors corresponding to non-zero coefficients; or, the terminal may choose to report part of the orthogonal basis vectors and their coefficients among the K 1 ⁇ M ⁇ M 1 coefficients.
  • the terminal determines that the at least two orthogonal basis vector groups include ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vector groups corresponding to ⁇ K 1 ⁇ M ⁇ M 1 coefficients, and the ⁇ K 1 ⁇ M ⁇ M 1 coefficients are larger ⁇ K 1 ⁇ M ⁇ M 1 coefficients among the non-zero coefficients, and the ⁇ is any constant between 0 and 1; or,
  • the terminal determines that the at least two orthogonal basis vector sets include ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vector sets corresponding to ⁇ K 1 ⁇ M ⁇ M 1 coefficients, the The ⁇ K 1 ⁇ M ⁇ M 1 coefficients are the larger ⁇ K 1 ⁇ M ⁇ M 1 coefficients among the non-zero coefficients, and the ⁇ is any constant between 0 and 1; or ,
  • the terminal determines that the at least two orthogonal basis vector sets include ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vector sets corresponding to ⁇ K 1 ⁇ M ⁇ M 1 coefficients, and the ⁇ K 1
  • the ⁇ M ⁇ M 1 coefficients are the larger ⁇ K 1 ⁇ M ⁇ M 1 coefficients among the non-zero coefficients.
  • the above value of ⁇ can be specified by the protocol or indicated by the network side device.
  • the protocol stipulates that ⁇ is equal to 0.5
  • after the terminal selects 24 orthogonal basis vector groups, it can only report the 24 Among the 24 coefficients corresponding to the orthogonal basis vector set, 0.5 ⁇ 24 12 coefficients that are not equal to zero and have larger values, and the 12 orthogonal basis vector sets corresponding to the 12 coefficients.
  • the above-mentioned terminal reports ⁇ K 1 ⁇ M ⁇ M 1 coefficients can be: the terminal reports ⁇ M 1 Doppler domain coefficients for each of the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs Nonzero coefficients of the orthogonal basis vectors. Or, after selecting K 1 ⁇ M ⁇ M 1 orthogonal basis vector groups, further select larger ⁇ K 1 ⁇ M ⁇ M 1 non-zero coefficients from K 1 ⁇ M ⁇ M 1 coefficients, where , the value of ⁇ can be predefined by the protocol or indicated by the network side device.
  • the above-mentioned terminal reports ⁇ K 1 ⁇ M ⁇ M 1 coefficient can be: the terminal reports the larger ⁇ K 1 ⁇ M among the K 1 ⁇ M space-frequency domain orthogonal basis vector pairs non-zero coefficients (that is, K 1 ⁇ M coefficients of K 1 ⁇ M spatial-frequency domain orthogonal basis vector pairs include ⁇ K 1 ⁇ M non-zero coefficients), and the ⁇ K 1 ⁇ M spatial domain - Each of the frequency-domain orthogonal basis vector pairs reports ⁇ M 1 more
  • the coefficients of the orthogonal basis vectors in the Doppler domain, the coefficients of the ⁇ M 1 Doppler domain orthogonal basis vectors are the larger values of ⁇ M 1 among the coefficients of the M 1 Doppler domain orthogonal basis vectors a non-zero coefficient.
  • the terminal first selects K 1 ⁇ M space-frequency domain orthogonal basis vector pairs, and then selects ⁇ K 1 ⁇ M non-zero coefficients with large values, and for each of the ⁇ K 1 ⁇ M spatial-frequency domain orthogonal basis vector pairs corresponding to the ⁇ K 1 ⁇ M coefficients, select M 1 Doppler-domain orthogonal basis vector, and finally, according to the coefficients of the M 1 Doppler-domain orthogonal basis vectors, select ⁇ M 1 non-zero coefficients with larger values, and finally get ⁇ K 1 ⁇ M ⁇ ⁇ ⁇ M 1 coefficient.
  • the set of ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vectors includes coefficients selected from K 1 ⁇ M space-frequency domain orthogonal basis vector pairs that are not zero and whose magnitudes are smaller Large ⁇ K 1 ⁇ M ones, and each of the ⁇ K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponds to the coefficients of ⁇ M 1 Doppler domain orthogonal basis vectors, wherein, the ⁇ M 1 Doppler-domain orthogonal basis vectors are ⁇ M 1 of the M 1 Doppler-domain orthogonal basis vectors with non-zero coefficients and relatively large amplitudes.
  • the selection process of the coefficients of the ⁇ K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs is separated from the selection process of the coefficients of the ⁇ M 1 Doppler domain orthogonal basis vectors, so that According to the existing technology, select the larger space-frequency domain orthogonal basis vector pairs among the ⁇ K 1 ⁇ M non-zero coefficients, and then select the corresponding ⁇ M 1 Doppler domain orthogonal basis vectors with large coefficients.
  • the above-mentioned terminal reporting ⁇ K 1 ⁇ M ⁇ M 1 coefficients can be: the terminal reports ⁇ K 1 ⁇ among the K 1 ⁇ M coefficients of K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs M non-zero coefficients, that is, the terminal selects M 1 Doppler domain orthogonal basis vectors for each non-zero coefficient space-frequency domain orthogonal basis vector pair, and reports the M 1 Doppler domain orthogonal basis vectors The coefficients of the basis vectors.
  • K 1 ⁇ M ⁇ M 1 orthogonal basis vector groups further select larger ⁇ K 1 ⁇ M ⁇ M 1 non-zero coefficients from the K 1 ⁇ M ⁇ M 1 coefficients.
  • the overhead of CSI reporting can be reduced by reporting the relatively large non-zero coefficients among the K 1 ⁇ M ⁇ M 1 coefficients.
  • the CSI reporting method further includes:
  • the terminal determines a first window in the Doppler domain, and the CSI report further includes third indication information, where the third indication information is used to indicate at least one of a starting position and a window length of the first window , the Doppler domain orthogonal basis vectors in the at least two sets of orthogonal basis vectors are measured in the first window, and the window length of the first window is less than or equal to the N 4 , or, the The window length of the first window is less than or equal to the product of N 4 and the oversampling multiple in the Doppler domain.
  • the above-mentioned first window may be a Doppler window determined by the terminal, that is, the terminal determines a range of the Doppler domain, and measures and selects an orthogonal basis vector in the Doppler domain within the range of the Doppler domain.
  • the first window range, and in the expanded first window the Doppler domain orthogonal basis vectors are oversampled according to the Doppler domain oversampling multiple.
  • the window length of the first window is less than or equal to the N 4 , which can be understood as: the first window contains at most N 4 sampling points in the time domain, thus corresponding to at most N 4 Doppler domain orthogonal basis vectors.
  • the window length of the above-mentioned first window is less than or equal to the product of N 4 and the oversampling multiple in the Doppler domain, which can be understood as: the first window contains at most 0 3 times the time-domain sampling points of N 4 , thus corresponding to at most O 3 times the Doppler domain orthogonal basis vectors of N 4 , where O 3 is the oversampling multiple in the Doppler domain.
  • the above-mentioned first window may be indicated by its starting position and window length, wherein the length of the first window may be specified in the protocol or reported by the terminal through the above-mentioned third indication information, and the starting position of the first window may be The position can be reported by the terminal or defaults to 0.
  • the third indication information may only indicate one of them, or indicate two items, wherein, in the case where the third indication information only indicates one of them, the other item may be determined in a manner stipulated in the agreement For example, assuming that the initial position of the first window is 0 by default in the protocol, if the third indication information indicates that the window length of the first window is 5, then the Doppler domain corresponding to the first window ranges from 0 to 5.
  • the terminal reports the range of the Doppler domain to the network side device, so that the network side device can perform channel recovery and channel prediction based on the Doppler domain orthogonal basis vectors within the range.
  • each space domain-frequency domain orthogonal basis vector pair in the at least two sets of orthogonal basis vectors corresponds to the respective first window, or, in the at least two sets of orthogonal basis vectors All pairs of space domain-frequency domain orthogonal basis vectors correspond to the same first window.
  • each space-frequency domain orthogonal basis vector pair can be in the same or different Respective Doppler domain orthogonal basis vectors are selected within the scope of different Doppler domains, which is not specifically limited here.
  • the CSI reporting method further includes:
  • the terminal receives fourth indication information from the network side device, where the fourth indication information is used to indicate at least one of the starting position and the window length of the second window for measuring the Doppler domain orthogonal basis vector , and/or, the fourth indication information is used to indicate at least one of the starting position and the window length of the third window for measuring the frequency-domain orthogonal basis vector, wherein the second window is a Doppler domain window, the third window is a window in the delay domain, the window length of the second window is less than or equal to the N 4 , or the window length of the second window is less than or equal to the N 4 and Doppler The product of domain oversampling multiples, the length of the third window is less than or equal to N 3 , where N 3 is the number of frequency domain sampling points indicated by the network side device;
  • the terminal includes:
  • the terminal selects the Doppler domain orthogonal basis vector of the CSI-RS within the second window
  • the terminal selects the CSI-RS within the third window and needs to calculate Doppler domain information Orthogonal basis vectors in the frequency domain;
  • the terminal selects the frequency-domain orthogonal basis vector of the CSI-RS within the third window.
  • the terminal can select the Doppler domain orthogonal basis vector within the range of the Doppler domain (ie, the second window) indicated by the network side device.
  • the terminal can also report the first window to the network side device, and the first window is included in the second window, at this time, the terminal can indicate to the network side device Doppler domain orthogonal basis vectors are selected within the partial Doppler domain range.
  • the second window indicated by the network side device is 0-8, if the terminal selects the Doppler domain orthogonal basis vector within the Doppler domain range: 0-5, the first window that the terminal can report can be 0-8 5.
  • N 4 symbols represent N 4 ⁇ R 2 Doppler sampling points, where R 2 is the oversampling multiple, and the base station indicates a window (ie, the second window) , the starting position of the window is 0, the length is N d , configured by the base station, N d ⁇ N 4 , the terminal will only measure and report the Doppler in the range of 0 ⁇ N d -1, this can help the terminal reduce the complexity.
  • the terminal specifically reports several Doppler domain orthogonal basis vectors, which can be determined according to the parameter M 1.
  • M 1 1
  • the terminal can only report a 3-bit number to represent a certain value in the position index 0-5 , which is the starting position of the first window.
  • the above-mentioned third window is the delay domain range indicated by the network side device, and the delay domain range can be converted into a corresponding frequency domain range, and the terminal can select a frequency domain orthogonal basis vector within the frequency domain range, and/or , the terminal can select an orthogonal basis vector in the frequency domain that needs to calculate Doppler domain information within the range of the frequency domain.
  • the network device may indicate the Doppler domain range and/or the frequency domain range to the terminal, so that the terminal selects the Doppler domain orthogonal basis vector and /or frequency-domain orthogonal basis vectors, which can reduce the calculation amount of the terminal.
  • the above-mentioned M +1 Doppler domain orthogonal basis vectors can be oversampled, and the oversampling multiple can be indicated by the network side device or a range can be agreed upon through an agreement, wherein, if the oversampling multiple is indicated by the network side device, Then the oversampling multiple can be configured jointly with parameters such as M and K 1 .
  • the CSI reporting method further includes:
  • the terminal acquires a Doppler oversampling multiple O 3 , and the Doppler oversampling multiple O 3 includes O 3 Doppler oversampling identifiers;
  • the terminal selects at least two orthogonal basis vector groups according to the CSI-RS of at least two symbols transmitted on the target downlink channel, including:
  • the terminal selects M 1 Doppler domain orthogonal basis vectors from N 4 ⁇ O 3 candidate Doppler domain orthogonal basis vectors;
  • the first indication information further includes Doppler oversampling identifiers corresponding to the M 1 Doppler domain orthogonal basis vectors.
  • each Doppler oversampling flag can correspond to a group of Doppler domain orthogonal basis vectors
  • the terminal when the terminal obtains the Doppler oversampling multiple O 3 , there are N 4 ⁇ O 3 candidate Doppler domain orthogonal basis vectors in total, and the M 1 Doppler domain orthogonal basis vectors selected by the terminal The basis vectors are included in the N 4 ⁇ O 3 candidate Doppler domain orthogonal basis vectors.
  • the network side device instructs the terminal not to detect the second set of Doppler domain orthogonal basis vectors, Or instruct the terminal not to detect the Doppler domain orthogonal basis vectors of some of the time domain sampling points in the N 4 time domain sampling points, then it can be excluded from the N 4 ⁇ O 3 candidate Doppler domain orthogonal basis vectors
  • the non-detection partial Doppler domain orthogonal basis vector indicated by the network side device can reduce the calculation amount of the terminal.
  • the terminal when the terminal reports the CSI, it may also indicate the Doppler oversampling flag corresponding to the Doppler domain orthogonal basis vector selected in the CSI, that is, tell the network side device that the terminal selects from O3 Which Doppler oversampling is identified, and/or, when reporting the CSI, the terminal may also indicate the time domain sampling point corresponding to the Doppler domain orthogonal basis vector selected in the CSI.
  • the terminal may also indicate the Doppler domain range where the Doppler domain orthogonal basis vector corresponding to the above-mentioned Doppler oversampling identifier and/or time domain sampling point selected by the terminal is located by reporting the first window .
  • each space domain-frequency domain orthogonal basis vector pair can correspond to the same or different Different Doppler oversampling identifiers, for example: the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs correspond to the same Doppler oversampling identifier, which is not specifically limited here.
  • the terminal may also report all selected Doppler domain orthogonal basis vectors to the network side device, which is not specifically limited here.
  • the CSI report also includes a strongest coefficient indicator (Strongest Coefficient Indicator, SCI), the SCI is used to indicate the position of the coefficient with the largest amplitude value, and the position includes:
  • the coefficients of the space domain orthogonal basis vector, the frequency domain orthogonal basis vector and the Doppler domain orthogonal basis vector are all complex numbers, and the complex numbers have amplitude values (may be referred to simply as amplitude values) and phase values, wherein the amplitude
  • the maximum value can be regarded as the maximum power of the equivalent channel.
  • the terminal can report the position of a coefficient with the largest amplitude, and report the ratio (including amplitude and phase) of the other 11 coefficients to this coefficient.
  • the base station can report the position of the largest coefficient
  • the magnitude of the coefficient is regarded as 1, and the phase is regarded as 0.
  • the base station can obtain the relationship of 12 coefficients. In this way, each ratio reported by the terminal and the corresponding original coefficient have a fixed multiple relationship. so as not to affect the final result.
  • the CSI report further includes a bitmap of the coefficient
  • the bitmap is the bit of the product of the coefficients of the K 1 spatial domain orthogonal basis vectors, the coefficients of the M frequency domain orthogonal basis vectors, and the coefficients of the M 1 Doppler domain orthogonal basis vectors Figure; or,
  • the bit map is a bit map of the number K NZ of the first parameter whose value is the first preset value, wherein, if the target first parameter is equal to the first preset value, the second indication information includes Coefficients of M 1 Doppler domain orthogonal basis vectors corresponding to the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponding to the target first parameter; if the target first parameter is equal to the second preset value , the second indication information includes the preset number of M 1 Doppler domain orthogonal basis vectors corresponding to the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponding to the target first parameter Coefficients of the Puller domain orthogonal basis vectors; or,
  • the bitmap is a bitmap of the product of the K NZ and the coefficients of the M 1 Doppler domain orthogonal basis vectors.
  • the coefficient bitmap is used to indicate the position of the coefficient of the orthogonal basis vector reported by the terminal.
  • the K 1 ⁇ M bitmap 1 is used to indicate the non-zero coefficient
  • the K 1 ⁇ M The bitmap of is composed of the coefficients of K 1 space-domain orthogonal basis vectors and the coefficients of M frequency-domain orthogonal basis vectors.
  • K 1 ⁇ M ⁇ M 1 bitmap where 1 is used to indicate non-zero coefficients, the K 1 ⁇ M ⁇ M 1 bitmap consists of K 1 coefficients of spatial domain orthogonal basis vectors, M frequency domain The coefficients of the orthogonal basis vectors and the composition of the coefficients of M 1 Doppler domain orthogonal basis vectors;
  • K NZ represents the number of 1s in the K 1 ⁇ M bitmap.
  • the bit value in the bitmap is equal to 1, it means that the M1 Doppler domain orthogonal basis vectors corresponding to the space domain-frequency domain orthogonal base pair corresponding to the bit value all report coefficients; If the bit value is equal to 0, it means that there is only one reporting coefficient in the M 1 Doppler domain orthogonal base vectors corresponding to the space domain-frequency domain orthogonal base pair corresponding to the bit value (for example: M 1 Doppler domain orthogonal base vectors
  • the coefficient of the first Doppler-domain orthogonal basis vector in the intersection basis vector, that is, the preset Doppler-domain orthogonal basis vector can be the first Doppler among the M 1 Doppler-domain orthogonal basis vectors Domain Orthogonal Basis Vectors);
  • the bitmap in the CSI can be omitted in some cases, for example: in the case of meeting the preset condition, the CSI report does not include the bitmap, the preset condition Include at least one of the following:
  • said M 1 is equal to 1;
  • the values of the bitmap are all equal to 1.
  • bitmap may not be reported when it is not necessary, and the resource consumption of CSI reporting can be reduced.
  • H ij N r *The complex matrix of P, based on which the terminal calculates and reports the PMI.
  • N 4 1
  • the terminal will use channels of all subbands to select 2 ⁇ L (or K 1 ) spatial domain orthogonal basis vectors and M v (or M) frequency domain orthogonal basis vectors, where, L represents the number of beams.
  • L represents the number of beams.
  • common 2 ⁇ L spatial domain orthogonal basis vectors and M v frequency domain orthogonal basis vectors are selected.
  • 2 ⁇ L space-domain orthogonal basis vectors and M v frequency-domain orthogonal basis vectors are selected by the following steps:
  • Cov represents the covariance matrix
  • H indicates the MIMO matrix
  • Step 2 Select the strongest 2L column in Cov, or divide H ij into two polarizations, select the strongest L column on each polarization, and then merge into 2L columns, the result on each polarization can be the same It can also be different.
  • Step 3 In each symbol, the N 3 channels are transformed into the time delay domain through the discrete inverse Fourier transform (Inverse Discrete Fourier Transform, IDFT) of N 3 points, and the N 3 symbols are transformed at each time delay point The power is added, and M v time delays with the highest power are selected.
  • IDFT Inverse Discrete Fourier Transform
  • Step 4 According to the selected 2L space-domain orthogonal basis W 1 and the frequency-domain orthogonal basis W f corresponding to M v time delays, determine 2L ⁇ M v space-frequency domain orthogonal basis pairs, and then calculate each The equivalent channel H ie of the space-frequency domain orthogonal base pair, where e is the identity of the space-frequency domain orthogonal base pair, and its value is any integer from 1 to 2L ⁇ M v , and H ie is Nr ⁇ 2L matrix.
  • Step 5 For each space-frequency domain orthogonal base pair, perform N 4 ⁇ R 2 -point discrete Fourier transform (Discrete Fourier Transform, DFT) changes on the H ie of all N 4 symbols to obtain the Doppler domain channel, where R 2 is the oversampling multiple of the Doppler domain, calculate the power value of each point, find the position with the highest power value, and report the oversampling index and Doppler offset corresponding to this position to the base station.
  • DFT Discrete Fourier Transform
  • N 4 H ie perform DFT of N 4 ⁇ R 2 points
  • k represents the oversampling flag
  • the value of k is Any integer from 1 to R 2
  • i corresponding to the H ike with the highest power is the Doppler offset value.
  • each spatial-frequency domain orthogonal base pair has a Doppler offset value result.
  • the value of k of all the space domain-frequency domain orthogonal base pairs may be the same, but the value of i may be different.
  • the terminal selects at least two orthogonal basis vector groups according to the channel state information reference signal CSI-RS of at least two symbols transmitted on the target downlink channel, and each of the orthogonal basis vector groups includes 1 Doppler domain orthogonal basis vectors, or each set of orthogonal basis vectors includes 1 Doppler domain orthogonal basis vector and also includes at least one of the following: 1 space domain orthogonal basis vector and 1 frequency domain Domain orthogonal basis vector, the at least two symbols correspond to N 4 time domain sampling points, N 4 is an integer greater than 1; the terminal sends a CSI report to the network side device, and the CSI report includes the first indication information and The second indication information, the first indication information includes identification information of each orthogonal base vector in the at least two orthogonal base vector groups, and the second indication information includes at least one of the following: the at least two The coefficient of each orthogonal basis vector in the set of orthogonal basis vectors and the combination coefficient of at least two orthogonal basis vectors.
  • the first indication information includes identification information of each ortho
  • a channel prediction method provided by the embodiment of the present application corresponds to the CSI reporting method shown in Figure 2, that is, the channel prediction method provided by the embodiment of the present application sends a CSI-RS to the network side device for execution
  • the terminal of the CSI reporting method as shown in Figure 2 detects the CSI-RS, and reports the CSI reported to the network-side device performing the channel prediction method as shown in Figure 3 according to the detection result, so that the network-side device reports according to the CSI
  • the Doppler domain information in the target channel is used to know the change of the target downlink channel over time, and then the channel state information of the target downlink channel can be predicted accordingly.
  • the channel prediction method may include the following steps:
  • Step 301 the network side device sends the CSI-RS to the terminal through at least two symbols on the target downlink channel, the at least two symbols correspond to N 4 sampling points in the time domain, where N 4 is an integer greater than 1.
  • time-domain sampling points in this embodiment of the present application have the same meaning as the time-domain sampling points in the CSI reporting method shown in FIG. 2 , and details are not repeated here.
  • Step 302 the network side device receives a CSI report from the terminal, the CSI report includes first indication information and second indication information, and the first indication information includes each of at least two orthogonal basis vector groups
  • the identification information of the orthogonal basis vectors, the second indication information includes at least one of the following items: the coefficient of each orthogonal basis vector in the at least two orthogonal basis vector groups and the coefficients of the at least two orthogonal basis vectors Combining coefficients, each of the at least two sets of orthogonal basis vectors includes 1 Doppler domain orthogonal basis vector, or each of the sets of orthogonal basis vectors includes 1 Doppler
  • the domain orthogonal basis vectors also include at least one of the following: 1 space domain orthogonal basis vector and 1 frequency domain orthogonal basis vector.
  • the first indication information, the second indication information, the orthogonal basis vector group, and the coefficients of each orthogonal basis vector in at least two orthogonal basis vector groups in the embodiment of the present application can refer to the CSI report shown in Figure 2 The explanation in the method will not be repeated here.
  • Step 303 the network side device predicts the channel state information of the target downlink channel according to the CSI report.
  • the network side device predicts the channel state information of the target downlink channel according to the CSI report, which may be based on the space domain orthogonal basis vector and its coefficient, frequency domain normal
  • the orthogonal basis vector and its coefficients and the Doppler domain orthogonal basis vector and its coefficients are used to restore the target downlink channel, and the recovered target downlink channel is restored based on the Doppler domain orthogonal basis vector and its coefficients, so as to reflect the target
  • the network-side device can predict the channel state information of the target downlink channel at a subsequent time according to the time-varying characteristics of the target downlink channel.
  • the at least two orthogonal basis vector groups are K 1 ⁇ M ⁇ M 1 orthogonal basis vector groups, and the K 1 ⁇ M ⁇ M 1 orthogonal basis vector groups include K 1 ⁇ M Space-frequency domain orthogonal basis vector pairs and M 1 Doppler domain orthogonal basis vectors corresponding to the K 1 ⁇ M space-frequency domain orthogonal basis vector pairs;
  • the K 1 is the number of airspace orthogonal vector bases indicated by the network side device
  • the M is the network side
  • the M 1 is the number of Doppler domain orthogonal vector bases indicated by the network side device
  • K 1 , M and M 1 are positive integers respectively.
  • the K 1 ⁇ M space-frequency domain orthogonal basis vector pairs are jointly selected according to the N 4 time-domain sampling points; or,
  • the K 1 ⁇ M pairs of space-frequency domain orthogonal basis vectors are preset space-frequency domain orthogonal basis vectors in the space-frequency domain orthogonal basis vector pairs corresponding to the N 4 time-domain sampling points Yes, the preset airspace-frequency domain orthogonal basis vector pair includes:
  • each of the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponds to M 1 same Doppler domain orthogonal basis vectors.
  • the at least two sets of orthogonal basis vectors include:
  • Orthogonal basis vector groups corresponding to non-zero coefficients in the K 1 ⁇ M ⁇ M 1 orthogonal basis vector groups; or,
  • the ⁇ K 1 ⁇ M ⁇ M 1 coefficients are the non-zero coefficients 1 large ⁇ K 1 ⁇ M ⁇ M, where ⁇ is any constant between 0 and 1; or,
  • the set of ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vectors includes coefficients selected from K 1 ⁇ M space-frequency domain orthogonal basis vector pairs that are not zero and whose magnitudes are smaller Large ⁇ K 1 ⁇ M ones, and each of the ⁇ K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponds to the coefficients of ⁇ M 1 Doppler domain orthogonal basis vectors, wherein, the ⁇ M 1 Doppler-domain orthogonal basis vectors are ⁇ M 1 of the M 1 Doppler-domain orthogonal basis vectors with non-zero coefficients and relatively large amplitudes.
  • each of the N 4 time-domain sampling points corresponds to a time-domain position of one symbol, a part of one symbol, at least two symbols, or at least one CSI-RS resource.
  • the CSI report further includes third indication information, the third indication information is used to indicate at least one of the starting position and the window length of the first window, and the at least two orthogonal basis vector sets
  • the Doppler domain orthogonal basis vector in is measured in the first window, and the window length of the first window is less than or equal to the N 4 , or, the window length of the first window is less than or equal to the N 4 and Doppler domain oversampling multiple product of .
  • each space domain-frequency domain orthogonal basis vector pair in the at least two sets of orthogonal basis vectors corresponds to the respective first window, or, in the at least two sets of orthogonal basis vectors All pairs of space domain-frequency domain orthogonal basis vectors correspond to the same first window.
  • the channel prediction method further includes:
  • the network side device sends fourth indication information to the terminal, where the fourth indication information is used to indicate at least one of the starting position and the window length of the second window for measuring the Doppler domain orthogonal basis vector , and/or, the fourth indication information is used to indicate at least one of the starting position and the window length of the third window for measuring the frequency-domain orthogonal basis vector, wherein the second window is a Doppler domain window, the third window is a window in the delay domain, the window length of the second window is less than or equal to the N 4 , or the window length of the second window is less than or equal to the N 4 and Doppler The product of domain oversampling multiples, the length of the third window is less than or equal to N3, and N3 is the number of frequency domain sampling points indicated by the network side device.
  • the first indication information further includes Doppler oversampling identifiers corresponding to the M 1 Doppler domain orthogonal basis vectors.
  • the K 1 ⁇ M pairs of space domain-frequency domain orthogonal basis vectors correspond to the same Doppler oversampling identifier.
  • the CSI report further includes the strongest coefficient indication SCI, the SCI is used to indicate the position of the coefficient with the largest amplitude value, and the position includes:
  • the CSI report further includes a bitmap of the coefficients
  • the bitmap is the bit of the product of the coefficients of the K 1 spatial domain orthogonal basis vectors, the coefficients of the M frequency domain orthogonal basis vectors, and the coefficients of the M 1 Doppler domain orthogonal basis vectors Figure; or,
  • the bit map is a bit map of the number K NZ of the first parameter whose value is the first preset value, wherein, if the target first parameter is equal to the first preset value, the second indication information includes Coefficients of M 1 Doppler domain orthogonal basis vectors corresponding to the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponding to the target first parameter; if the target first parameter is equal to the second preset value , the second indication information includes the preset number of M 1 Doppler domain orthogonal basis vectors corresponding to the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponding to the target first parameter Coefficients of the Puller domain orthogonal basis vectors; or,
  • the bitmap is a bitmap of the product of the K NZ and the coefficients of the M 1 Doppler domain orthogonal basis vectors.
  • the CSI report does not include the bitmap when a preset condition is met, and the preset condition includes at least one of the following:
  • said M 1 is equal to 1;
  • the values of the bitmap are all equal to 1.
  • the channel prediction method provided by the embodiment of the present application can reflect the Doppler domain information of the target downlink channel based on the codebook used in the CSI report reported by the terminal, so that the channel state information of the target downlink channel can be predicted according to the Doppler domain information .
  • the CSI reporting method provided in the embodiment of the present application may be executed by a CSI reporting device.
  • the CSI reporting device provided by the embodiment of the present application is described by taking the CSI reporting device executing the CSI reporting method as an example.
  • the CSI reporting device 400 is applied to a terminal.
  • the CSI reporting device 400 may include the following modules:
  • the selection module 401 is configured to select at least two orthogonal basis vector groups according to the channel state information reference signal CSI-RS of at least two symbols transmitted on the target downlink channel, and each of the orthogonal basis vector groups includes more than one Orthogonal basis vectors in the Doppler domain, or each set of orthogonal basis vectors includes 1 orthogonal basis vector in the Doppler domain and also includes at least one of the following: 1 orthogonal basis vector in the space domain and 1 orthogonal basis vector in the frequency domain An intersection basis vector, the at least two symbols correspond to N 4 time-domain sampling points, and N 4 is an integer greater than 1;
  • the first sending module 402 is configured to send a CSI report to the network side device, the CSI report includes first indication information and second indication information, and the first indication information includes each of the at least two orthogonal basis vector groups
  • the identification information of an orthogonal basis vector, the second indication information includes at least one of the following: the coefficient of each orthogonal basis vector in the at least two orthogonal basis vector groups and the combination of at least two orthogonal basis vectors coefficient.
  • select module 401 including:
  • the first selection unit is configured to select K 1 spatial domain orthogonal basis vectors and M frequency domain orthogonal basis vectors according to the CSI-RS of at least two symbols transmitted on the target downlink channel to obtain K 1 ⁇ M spatial domain ⁇ Orthogonal basis vector pairs in the frequency domain;
  • the second selection unit is configured to select M 1 Doppler domain orthogonal basis vectors for each of the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs, to obtain K 1 ⁇ M ⁇ M 1 set of orthogonal basis vectors;
  • the K 1 is the number of space domain orthogonal vector bases indicated by the network side equipment
  • the M is the number of frequency domain orthogonal vector bases indicated by the network side equipment
  • the M 1 is the Doppler frequency domain indicated by the network side equipment.
  • the number of Le field orthogonal vector bases, K 1 , M and M 1 are respectively positive integers.
  • the K 1 ⁇ M space-frequency domain orthogonal basis vector pairs are jointly selected according to the N 4 time-domain sampling points; or,
  • the K 1 ⁇ M pairs of space-frequency domain orthogonal basis vectors are preset space-frequency domain orthogonal basis vectors in the space-frequency domain orthogonal basis vector pairs corresponding to the N 4 time-domain sampling points Yes, the preset airspace-frequency domain orthogonal basis vector pair includes:
  • each of the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponds to M 1 same Doppler domain orthogonal basis vectors.
  • the selection module 401 is also used to execute:
  • the at least two orthogonal basis vector sets include the orthogonal basis vector sets corresponding to non-zero coefficients in the K 1 ⁇ M ⁇ M 1 orthogonal basis vector sets; or,
  • the at least two orthogonal basis vector sets include ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vector sets corresponding to ⁇ K 1 ⁇ M ⁇ M 1 coefficients, the ⁇ K 1 ⁇ M ⁇
  • the M 1 coefficients are the larger ⁇ K1 ⁇ M ⁇ M 1 of the non-zero coefficients, and the ⁇ is any constant between 0 and 1; or,
  • the at least two orthogonal basis vector sets include ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vector sets corresponding to ⁇ K 1 ⁇ M ⁇ M 1 coefficients, the ⁇ K 1 ⁇ M ⁇ M 1 coefficient is the larger ⁇ K 1 ⁇ M ⁇ M 1 among the non-zero coefficients, and the ⁇ is any constant between 0 and 1; or,
  • the at least two orthogonal basis vector sets include ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vector sets corresponding to ⁇ K 1 ⁇ M ⁇ M 1 coefficients, and the ⁇ K 1 ⁇ M ⁇ M 1 coefficients are larger ⁇ K 1 ⁇ M ⁇ M 1 coefficients among the non-zero coefficients.
  • the set of ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vectors includes coefficients selected from K 1 ⁇ M space-frequency domain orthogonal basis vector pairs that are not zero and whose magnitudes are smaller Large ⁇ K 1 ⁇ M ones, and each of the ⁇ K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponds to the coefficients of ⁇ M 1 Doppler domain orthogonal basis vectors, wherein, the ⁇ M 1 Doppler-domain orthogonal basis vectors are ⁇ M 1 of the M 1 Doppler-domain orthogonal basis vectors with non-zero coefficients and relatively large amplitudes.
  • each of the N 4 time-domain sampling points corresponds to a time-domain position of one symbol, a part of one symbol, at least two symbols, or at least one CSI-RS resource.
  • the CSI reporting device 400 also includes:
  • a determining module configured to determine the first window in the Doppler domain, the CSI report further includes third indication information, the third indication information is used to indicate at least one of the starting position and the window length of the first window One item, the Doppler domain orthogonal basis vectors in the at least two sets of orthogonal basis vectors are measured in the first window, and the window length of the first window is less than or equal to the N 4 , or , the window length of the first window is less than or equal to the product of N 4 and the Doppler domain oversampling multiple.
  • each space domain-frequency domain orthogonal basis vector pair in the at least two sets of orthogonal basis vectors corresponds to the respective first window, or, in the at least two sets of orthogonal basis vectors all empty The domain-frequency domain orthogonal basis vector pair corresponds to the same first window.
  • the CSI reporting device 400 also includes:
  • the second receiving module is configured to receive fourth indication information from the network side device, where the fourth indication information is used to indicate the starting position and window length of the second window for measuring the Doppler domain orthogonal basis vector and/or, the fourth indication information is used to indicate at least one of the starting position and window length of the third window for measuring the frequency-domain orthogonal basis vector, wherein the second window is A window in the Doppler domain, the third window is a window in the delay domain, the window length of the second window is less than or equal to the N4, or the window length of the second window is less than or equal to the N4 and The product of the oversampling multiple in the Doppler domain, the length of the third window is less than or equal to N 3 , and the N 3 is the number of frequency domain sampling points indicated by the network side device;
  • the selection module 401 is specifically configured to perform at least one of the following:
  • the CSI reporting device 400 also includes:
  • An acquisition module configured to acquire a Doppler oversampling multiple O 3 , the Doppler oversampling multiple O 3 including O 3 Doppler oversampling identifications;
  • Select module 401 specifically for:
  • the first indication information further includes Doppler oversampling identifiers corresponding to the M 1 Doppler domain orthogonal basis vectors.
  • the K 1 ⁇ M pairs of space domain-frequency domain orthogonal basis vectors correspond to the same Doppler oversampling identifier.
  • the CSI report further includes the strongest coefficient indication SCI, the SCI is used to indicate the position of the coefficient with the largest amplitude value, and the position includes:
  • the CSI report further includes a bitmap of the coefficients
  • the bitmap is the bit of the product of the coefficients of the K 1 spatial domain orthogonal basis vectors, the coefficients of the M frequency domain orthogonal basis vectors, and the coefficients of the M 1 Doppler domain orthogonal basis vectors Figure; or,
  • the bit map is a bit map of the number K NZ of the first parameter whose value is the first preset value, wherein, if the target first parameter is equal to the first preset value, the second indication information includes The target No. K 1 ⁇ M space domain-frequency domain orthogonal basis vectors corresponding to a parameter The coefficients of M 1 Doppler domain orthogonal basis vectors corresponding; If the first parameter of the target is equal to the second preset value, then the The second indication information includes the preset Doppler domain orthogonality among the M 1 Doppler domain orthogonal basis vectors corresponding to the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponding to the target first parameter. the coefficients of the intersecting basis vectors; or,
  • the bitmap is a bitmap of the product of the K NZ and the coefficients of the M 1 Doppler domain orthogonal basis vectors.
  • the CSI report does not include the bitmap when a preset condition is met, and the preset condition includes at least one of the following:
  • said M 1 is equal to 1;
  • the values of the bitmap are all equal to 1.
  • the CSI reporting apparatus 400 in this embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component in the electronic device, such as an integrated circuit or a chip.
  • the electronic device may be a terminal, or other devices other than the terminal.
  • the terminal may include, but is not limited to, the types of terminal 11 listed above, and other devices may be servers, Network Attached Storage (Network Attached Storage, NAS), etc., which are not specifically limited in this embodiment of the present application.
  • the CSI reporting apparatus 400 provided by the embodiment of the present application can realize each process realized by the method embodiment shown in FIG. 2 and achieve the same technical effect. To avoid repetition, details are not repeated here.
  • the channel prediction method provided in the embodiment of the present application may be executed by a channel prediction device.
  • the channel prediction device provided in the embodiment of the present application is described by taking the channel prediction method performed by the channel prediction device as an example.
  • the channel prediction device 500 may include the following modules:
  • the second sending module 501 is configured to send the channel state information reference signal CSI-RS to the terminal through at least two symbols on the target downlink channel, the at least two symbols correspond to N 4 time domain sampling points, and N 4 is greater than 1 an integer of
  • the first receiving module 502 is configured to receive a CSI report from the terminal, the CSI report includes first indication information and second indication information, and the first indication information includes each of at least two orthogonal basis vector groups Orthogonal basis vector identification information, the second indication information includes at least one of the following: the coefficient of each orthogonal basis vector in the at least two orthogonal basis vector groups and the combination coefficient of at least two orthogonal basis vectors , each of the at least two sets of orthogonal basis vectors includes a Doppler-domain orthogonal basis vector, or each of the sets of orthogonal basis vectors includes a Doppler-domain normal
  • the orthogonal basis vectors also include at least one of the following: 1 spatial domain orthogonal basis vector and 1 frequency domain orthogonal basis vector;
  • the channel prediction module 503 is configured to predict the channel state information of the target downlink channel according to the CSI report.
  • the at least two orthogonal basis vector groups are K 1 ⁇ M ⁇ M 1 orthogonal basis vector groups, and the K 1 ⁇ M ⁇ M 1 orthogonal basis vector groups include K 1 ⁇ M Space-frequency domain orthogonal basis vector pairs and M 1 Doppler domain orthogonal basis vectors corresponding to the K 1 ⁇ M space-frequency domain orthogonal basis vector pairs;
  • the K1 is the number of space domain orthogonal vector bases indicated by the network side equipment
  • the M is the number of frequency domain orthogonal vector bases indicated by the network side equipment
  • the M1 is the Doppler domain indicated by the network side equipment
  • the number of orthogonal vector bases, K 1 , M and M 1 are respectively positive integers.
  • the K 1 ⁇ M space-frequency domain orthogonal basis vector pairs are jointly selected according to the N 4 time-domain sampling points; or,
  • the K 1 ⁇ M pairs of space-frequency domain orthogonal basis vectors are preset space-frequency domain orthogonal basis vectors in the space-frequency domain orthogonal basis vector pairs corresponding to the N 4 time-domain sampling points Yes, the preset airspace-frequency domain orthogonal basis vector pair includes:
  • each of the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponds to M 1 same Doppler domain orthogonal basis vectors.
  • the at least two sets of orthogonal basis vectors include:
  • Orthogonal basis vector groups corresponding to non-zero coefficients in the K 1 ⁇ M ⁇ M 1 orthogonal basis vector groups; or,
  • the ⁇ K 1 ⁇ M ⁇ M 1 coefficients are the non-zero coefficients 1 large ⁇ K 1 ⁇ M ⁇ M, where ⁇ is any constant between 0 and 1; or,
  • the set of ⁇ K1 ⁇ M ⁇ M 1 orthogonal basis vectors includes coefficients selected from K 1 ⁇ M pairs of space-frequency domain orthogonal basis vectors that are not zero and have relatively large coefficients ⁇ K 1 ⁇ M , and each of the ⁇ K 1 ⁇ M spatial-frequency domain orthogonal basis vector pairs corresponds to the coefficients of ⁇ M 1 Doppler domain orthogonal basis vectors, where , the ⁇ M 1 Doppler-domain orthogonal basis vectors are ⁇ M 1 ones among the M 1 Doppler-domain orthogonal basis vectors with non-zero coefficients and relatively large amplitudes.
  • each of the N 4 time-domain sampling points corresponds to a time-domain position of one symbol, a part of one symbol, at least two symbols, or at least one CSI-RS resource.
  • the CSI report further includes third indication information, the third indication information is used to indicate at least one of the starting position and the window length of the first window, and the at least two orthogonal basis vector sets
  • the Doppler domain orthogonal basis vector in is measured in the first window, and the window length of the first window is less than or equal to the N 4 , or, the window length of the first window is less than or equal to the The product of N 4 and the oversampling factor in the Doppler domain.
  • each space domain-frequency domain orthogonal basis vector pair in the at least two sets of orthogonal basis vectors corresponds to the respective first window, or, in the at least two sets of orthogonal basis vectors All pairs of space domain-frequency domain orthogonal basis vectors correspond to the same first window.
  • the channel prediction device 500 also includes:
  • the third sending module is configured to send fourth indication information to the terminal, where the fourth indication information is used to indicate at least one of the starting position and the window length of the second window for measuring the Doppler domain orthogonal basis vector one, and/or, the fourth indication information is used to indicate at least one of the starting position and the window length of the third window for measuring the frequency-domain orthogonal basis vector, wherein the second window is Doppler a window in the Le domain, the third window is a window in the delay domain, the window length of the second window is less than or equal to the N 4 , or the window length of the second window is less than or equal to the N 4 and more The product of the oversampling multiple in the Puller domain, the length of the third window is less than or equal to N3, and the N3 is the number of sampling points in the frequency domain indicated by the network side device.
  • the first indication information further includes Doppler oversampling identifiers corresponding to the M 1 Doppler domain orthogonal basis vectors.
  • the K 1 ⁇ M pairs of space domain-frequency domain orthogonal basis vectors correspond to the same Doppler oversampling identifier.
  • the CSI report further includes the strongest coefficient indication SCI, the SCI is used to indicate the position of the coefficient with the largest amplitude value, and the position includes:
  • the CSI report further includes a bitmap of the coefficients
  • the bitmap is the bit of the product of the coefficients of the K 1 spatial domain orthogonal basis vectors, the coefficients of the M frequency domain orthogonal basis vectors, and the coefficients of the M 1 Doppler domain orthogonal basis vectors Figure; or,
  • the bit map is a bit map of the number K NZ of the first parameter whose value is the first preset value, wherein, if the target first parameter is equal to the first preset value, the second indication information includes Coefficients of M 1 Doppler domain orthogonal basis vectors corresponding to the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponding to the target first parameter; if the target first parameter is equal to the second preset value , the second indication information includes the preset number of M 1 Doppler domain orthogonal basis vectors corresponding to the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponding to the target first parameter Coefficients of the Puller domain orthogonal basis vectors; or,
  • the bitmap is a bitmap of the product of the K NZ and the coefficients of the M 1 Doppler domain orthogonal basis vectors.
  • the CSI report does not include the bitmap when a preset condition is met, and the preset condition includes at least one of the following:
  • said M 1 is equal to 1;
  • the values of the bitmap are all equal to 1.
  • the channel prediction apparatus 500 provided in the embodiment of the present application can realize each process realized by the method embodiment shown in FIG. 3 and achieve the same technical effect. To avoid repetition, details are not repeated here.
  • the embodiment of the present application also provides a communication device 600, including a processor 601 and a memory 602, and the memory 602 stores programs or instructions that can run on the processor 601, such as , when the communication device 600 is a terminal, when the program or instruction is executed by the processor 601, each step of the above CSI reporting method embodiment is implemented, and the same technical effect can be achieved.
  • the communication device 600 is a network-side device, when the program or instruction is executed by the processor 601, the steps of the above-mentioned channel prediction method embodiment can be achieved, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.
  • the embodiment of the present application also provides a terminal, including a processor and a communication interface, the processor is used to select at least two orthogonal basis vector groups according to the CSI-RS of at least two symbols transmitted on the target downlink channel, each The set of orthogonal basis vectors includes 1 spatial domain orthogonal basis vector, 1 frequency domain orthogonal basis vector and 1 Doppler domain orthogonal basis vector, and the at least two symbols correspond to N 4 time domain sampling points , N 4 is an integer greater than 1,
  • the communication interface is used to send a CSI report to the network side device, the CSI report includes first indication information and second indication information, and the first indication information includes the at least two The identification information of each orthogonal basis vector in the set of orthogonal basis vectors, the second indication information includes at least one of the following items: the coefficient of each orthogonal basis vector in the at least two sets of orthogonal basis vectors and at least two Combination coefficients of orthogonal basis vectors.
  • FIG. 7 is a schematic diagram of a hardware structure of a terminal implementing an embodiment of the present application.
  • the terminal 700 includes, but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, and a processor 710. At least some parts.
  • the terminal 700 may also include a power supply (such as a battery) for supplying power to various components, and the power supply may be logically connected to the processor 710 through the power management system, so as to manage charging, discharging, and power consumption through the power management system. Management and other functions.
  • a power supply such as a battery
  • the terminal structure shown in FIG. 7 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine some components, or arrange different components, which will not be repeated here.
  • the input unit 704 may include a graphics processing unit (Graphics Processing Unit, GPU) 7041 and a microphone 7042, and the graphics processor 7041 is used by the image capture device (such as the image data of the still picture or video obtained by the camera) for processing.
  • the display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
  • the user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072 .
  • the touch panel 7071 is also called a touch screen.
  • the touch panel 7071 may include two parts, a touch detection device and a touch controller.
  • Other input devices 7072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.
  • the radio frequency unit 701 may transmit the downlink data from the network side device to the processor 710 for processing after receiving the downlink data; in addition, the radio frequency unit 701 may send uplink data to the network side device.
  • the radio frequency unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.
  • the memory 709 can be used to store software programs or instructions as well as various data.
  • the memory 709 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 by at least one function (such as a sound playing function, image playback function, etc.), etc.
  • memory 709 may include volatile memory or nonvolatile memory, or, memory 709 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), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash.
  • ROM Read-Only Memory
  • PROM programmable read-only memory
  • Erasable PROM Erasable PROM
  • EPROM erasable programmable read-only memory
  • Electrical EPROM Electrical EPROM
  • EEPROM electronically programmable Erase Programmable Read-Only 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 connection 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 , SLDRAM
  • Direct Memory Bus Random Access Memory Direct Rambus
  • the processor 710 may include one or more processing units; optionally, the processor 710 integrates an application processor and a modem processor, wherein the application processor mainly handles operations related to the operating system, user interface, and application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the foregoing modem processor may not be integrated into the processor 710 .
  • the processor 710 is configured to select at least two orthogonal basis vector groups according to the channel state information reference signal CSI-RS of at least two symbols transmitted on the target downlink channel, and each of the orthogonal
  • the base vector group includes 1 space domain orthogonal base vector, 1 frequency domain orthogonal base vector and 1 Doppler domain orthogonal base vector, the at least two symbols correspond to N 4 time domain sampling points, N 4 is an integer greater than 1;
  • the radio frequency unit 701 is configured to send a CSI report to the network side device, where the CSI report includes first indication information and second indication information, and the first indication information includes each of the at least two orthogonal basis vector groups
  • the identification information of the orthogonal basis vectors, the second indication information includes at least one of the following: the coefficient of each orthogonal basis vector in the at least two sets of orthogonal basis vectors and the combination coefficient of the at least two orthogonal basis vectors.
  • the selecting at least two orthogonal basis vector groups according to the CSI-RS of at least two symbols transmitted on the target downlink channel performed by the processor 710 includes:
  • K 1 space-domain orthogonal basis vectors and M frequency-domain orthogonal basis vectors are selected to obtain K 1 ⁇ M space-frequency domain orthogonal basis vector pairs ;
  • the K 1 is the number of space domain orthogonal vector bases indicated by the network side equipment
  • the M is the number of frequency domain orthogonal vector bases indicated by the network side equipment
  • the M 1 is the Doppler frequency domain indicated by the network side equipment.
  • the number of Le field orthogonal vector bases, K 1 , M and M 1 are respectively positive integers.
  • the K 1 ⁇ M space-frequency domain orthogonal basis vector pairs are jointly selected according to the N 4 time-domain sampling points; or,
  • the K 1 ⁇ M pairs of space-frequency domain orthogonal basis vectors are preset space-frequency domain orthogonal basis vectors in the space-frequency domain orthogonal basis vector pairs corresponding to the N 4 time-domain sampling points Yes, the preset airspace-frequency domain orthogonal basis vector pair includes:
  • each of the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponds to M 1 same Doppler domain orthogonal basis vectors.
  • the selecting at least two orthogonal basis vector groups according to the CSI-RS of at least two symbols transmitted on the target downlink channel performed by the processor 710 further includes:
  • the at least two orthogonal basis vector sets include the orthogonal basis vector sets corresponding to non-zero coefficients in the K 1 ⁇ M ⁇ M 1 orthogonal basis vector sets; or,
  • the at least two orthogonal basis vector sets include ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vector sets corresponding to ⁇ K 1 ⁇ M ⁇ M 1 coefficients, the ⁇ K 1 ⁇ M ⁇ M 1 coefficients for the non-zero coefficients 1 of the larger ⁇ K1 ⁇ M ⁇ M, said ⁇ is any constant between 0 and 1; or,
  • the at least two orthogonal basis vector sets include ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vector sets corresponding to ⁇ K 1 ⁇ M ⁇ M 1 coefficients, the ⁇ K 1 ⁇ M ⁇ M 1 coefficient is the larger ⁇ K 1 ⁇ M ⁇ M 1 among the non-zero coefficients, and the ⁇ is any constant between 0 and 1; or,
  • the at least two orthogonal basis vector sets include ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vector sets corresponding to ⁇ K 1 ⁇ M ⁇ M 1 coefficients, and the ⁇ K 1 ⁇ M ⁇ M 1 coefficients are larger ⁇ K 1 ⁇ M ⁇ M 1 coefficients among the non-zero coefficients.
  • the set of ⁇ K 1 ⁇ M ⁇ M 1 orthogonal basis vectors includes coefficients selected from K 1 ⁇ M space-frequency domain orthogonal basis vector pairs that are not zero and whose magnitudes are smaller Large ⁇ K 1 ⁇ M ones, and each of the ⁇ K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponds to the coefficients of ⁇ M 1 Doppler domain orthogonal basis vectors, wherein, the ⁇ M 1 Doppler-domain orthogonal basis vectors are ⁇ M 1 of the M 1 Doppler-domain orthogonal basis vectors with non-zero coefficients and relatively large amplitudes.
  • each of the N 4 time-domain sampling points corresponds to a time-domain position of one symbol, a part of one symbol, at least two symbols, or at least one CSI-RS resource.
  • the processor 710 is further configured to determine a first window in the Doppler domain, and the CSI report further includes third indication information, where the third indication information is used to indicate a starting position of the first window and at least one item in the window length, the Doppler domain orthogonal basis vectors in the at least two orthogonal basis vector groups are measured in the first window, and the window length of the first window is less than or equal to The N 4 , or, the window length of the first window is less than or equal to the product of the N 4 and the Doppler domain oversampling multiple.
  • each space domain-frequency domain orthogonal basis vector pair in the at least two sets of orthogonal basis vectors corresponds to the respective first window, or, in the at least two sets of orthogonal basis vectors All pairs of space domain-frequency domain orthogonal basis vectors correspond to the same first window.
  • the radio frequency unit 701 is further configured to receive fourth indication information from the network side device, where the fourth indication information is used to indicate the starting position of the second window for measuring the Doppler domain orthogonal basis vector and at least one of the window length, and/or, the fourth indication information is used to indicate at least one of the starting position and the window length of the third window for measuring the frequency-domain orthogonal basis vector, wherein the The second window is a window in the Doppler domain, the third window is a window in the delay domain, and the window length of the second window is less than or equal to the N4, or, the window length of the second window is less than or equal to the The product of N 4 and the oversampling multiple in the Doppler domain, the length of the third window is less than or equal to N 3 , and the N 3 is the number of frequency domain sampling points indicated by the network side device;
  • the selection of at least two orthogonal basis vector groups according to the CSI-RS of at least two symbols transmitted on the target downlink channel performed by the processor 710 includes:
  • the radio frequency unit 701 is also used to obtain a Doppler oversampling multiple O 3 , where the Doppler oversampling multiple O 3 includes O 3 Doppler oversampling identifiers;
  • the selection of at least two orthogonal basis vector groups according to the CSI-RS of at least two symbols transmitted on the target downlink channel performed by the processor 710 includes:
  • the first indication information further includes Doppler oversampling identifiers corresponding to the M 1 Doppler domain orthogonal basis vectors.
  • the K 1 ⁇ M pairs of space domain-frequency domain orthogonal basis vectors correspond to the same Doppler oversampling identifier.
  • the CSI report further includes the strongest coefficient indication SCI, the SCI is used to indicate the position of the coefficient with the largest amplitude value, and the position includes:
  • the CSI report further includes a bitmap of the coefficients
  • the bitmap is the bit of the product of the coefficients of the K 1 spatial domain orthogonal basis vectors, the coefficients of the M frequency domain orthogonal basis vectors, and the coefficients of the M 1 Doppler domain orthogonal basis vectors Figure; or,
  • the bit map is a bit map of the number K NZ of the first parameter whose value is the first preset value, wherein, if the target first parameter is equal to the first preset value, the second indication information includes Coefficients of M 1 Doppler domain orthogonal basis vectors corresponding to the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponding to the target first parameter; if the target first parameter is equal to the second preset value , the second indication information includes the preset number of M 1 Doppler domain orthogonal basis vectors corresponding to the K 1 ⁇ M space domain-frequency domain orthogonal basis vector pairs corresponding to the target first parameter Coefficients of the Puller domain orthogonal basis vectors; or,
  • the bitmap is a bitmap of the product of the K NZ and the coefficients of the M 1 Doppler domain orthogonal basis vectors.
  • the CSI report does not include the bitmap when a preset condition is met, and the preset condition includes at least one of the following:
  • said M 1 is equal to 1;
  • the values of the bitmap are all equal to 1.
  • the terminal 700 provided in the embodiment of the present application can implement each of the CSI reporting devices shown in FIG. 4
  • the implementation process of the module can achieve the same beneficial effects as the CSI reporting device shown in FIG. 4 , which will not be repeated here.
  • the embodiment of the present application also provides a network side device, including a processor and a communication interface, the communication interface is used to send the channel state information reference signal CSI-RS to the terminal through at least two symbols on the target downlink channel, and the at least The two symbols correspond to N 4 sampling points in the time domain, where N 4 is an integer greater than 1, and a CSI report from the terminal is received, the CSI report includes first indication information and second indication information, and the first indication
  • the information includes identification information of each orthogonal basis vector in at least two sets of orthogonal basis vectors
  • the second indication information includes at least one of the following: each orthogonal basis vector in the at least two sets of orthogonal basis vectors
  • the coefficients and the combination coefficients of at least two orthogonal basis vectors, each of the at least two orthogonal basis vector groups includes 1 Doppler domain orthogonal basis vector, or each of the The set of orthogonal basis vectors includes 1 Doppler domain orthogonal basis vector and also includes at least one of the following: 1 space domain ortho
  • the embodiment of the present application also provides a network side device.
  • the network side device 800 includes: an antenna 801 , a radio frequency device 802 , a baseband device 803 , a processor 804 and a memory 805 .
  • the antenna 801 is connected to the radio frequency device 802 .
  • the radio frequency device 802 receives information through the antenna 801, and sends the received information to the baseband device 803 for processing.
  • the baseband device 803 processes the information to be sent and sends it to the radio frequency device 802
  • the radio frequency device 802 processes the received information and sends it out through the antenna 801 .
  • the method performed by the network side device in the above embodiments may be implemented in the baseband device 803, where the baseband device 803 includes a baseband processor.
  • the baseband device 803 may include at least one baseband board, for example, a plurality of chips are arranged on the baseband board, as shown in FIG.
  • the program executes the network device operations shown in the above method embodiments.
  • the network side device may also include a network interface 806, such as a common public radio interface (common public radio interface, CPRI).
  • a network interface 806 such as a common public radio interface (common public radio interface, CPRI).
  • the network-side device 800 in this embodiment of the present invention further includes: instructions or programs stored in the memory 805 and operable on the processor 804, and the processor 804 calls the instructions or programs in the memory 805 to execute the various programs shown in FIG.
  • the method of module execution achieves the same technical effect, so in order to avoid repetition, it is not repeated here.
  • the embodiment of the present application also provides a readable storage medium, the readable storage medium stores a program or an instruction, and when the program or instruction is executed by a processor, the above-mentioned CSI reporting method or channel prediction is realized
  • a processor executes the program or instruction to perform CSI reporting method or channel prediction.
  • the processor is the processor in the terminal described in the foregoing embodiments.
  • the readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and the like.
  • the 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, and the processor is used to run programs or instructions to implement the above-mentioned CSI reporting method or channel prediction
  • 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-mentioned CSI reporting method or channel prediction
  • the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.
  • An embodiment of the present application further provides a computer program/program product, 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 above-mentioned CSI reporting method or channel
  • Each process in the embodiment of the prediction method can achieve the same technical effect, and will not be repeated here to avoid repetition.
  • the embodiment of the present application also provides a wireless communication system, including: a terminal and a network-side device, the terminal can be used to perform the steps of the above CSI reporting method, and the network-side device can be used to perform the above-mentioned channel
  • a wireless communication system including: a terminal and a network-side device, the terminal can be used to perform the steps of the above CSI reporting method, and the network-side device can be used to perform the above-mentioned channel
  • the steps of the prediction method can achieve the same technical effect as the method embodiment shown in FIG. 2 and FIG. 3 , and will not be repeated here to avoid repetition.
  • the term “comprising”, “comprising” or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase “comprising a " does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.
  • the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente demande, qui appartient au domaine technique des communications, divulgue un procédé de rapport d'informations d'état de canal (CSI), un procédé de prédiction de canal, un terminal et un dispositif du côté réseau. Le procédé de rapport de CSI dans les modes de réalisation de la présente demande comprend : la sélection, par un terminal, d'au moins deux groupes de vecteurs à base orthogonale selon au moins deux symboles d'un signal CSI-RS transmis sur un canal de liaison descendante cible, chacun des groupes de vecteurs à base orthogonale comprenant un vecteur à base orthogonale de domaine Doppler, ou chacun des groupes de vecteurs à base orthogonale comprenant un vecteur à base orthogonale de domaine Doppler et comprenant en outre ce qui suit : un vecteur à base orthogonale de domaine spatial et/ou un vecteur à base orthogonale de domaine fréquentiel ; et l'envoi, par le terminal, d'un rapport de CSI à un dispositif du côté réseau, le rapport de CSI comprenant des premières informations d'indication et des secondes informations d'indication ; et les premières informations d'indication comprennent des informations d'identification de chaque vecteur à base orthogonale dans les deux groupes de vecteurs à base orthogonale ou plus, et les secondes informations d'indication comprennent ce qui suit : un coefficient de chaque vecteur à base orthogonale dans les deux groupes de vecteurs à base orthogonale ou plus et/ou un coefficient de combinaison d'au moins deux vecteurs à base orthogonale.
PCT/CN2023/076146 2022-02-22 2023-02-15 Procédé de rapport de csi, procédé de prédiction de canal, terminal et dispositif du côté réseau WO2023160442A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111277360A (zh) * 2019-01-11 2020-06-12 维沃移动通信有限公司 信道状态信息csi报告的传输方法、终端及网络设备
CN111327352A (zh) * 2018-12-17 2020-06-23 华为技术有限公司 一种通信方法及设备
CN111615142A (zh) * 2019-04-30 2020-09-01 维沃移动通信有限公司 信道状态信息csi报告的传输方法、终端及网络设备
US20210306048A1 (en) * 2018-12-13 2021-09-30 Vivo Mobile Communication Co.,Ltd. Method for determining index of orthogonal basis vector and device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210306048A1 (en) * 2018-12-13 2021-09-30 Vivo Mobile Communication Co.,Ltd. Method for determining index of orthogonal basis vector and device
CN111327352A (zh) * 2018-12-17 2020-06-23 华为技术有限公司 一种通信方法及设备
CN111277360A (zh) * 2019-01-11 2020-06-12 维沃移动通信有限公司 信道状态信息csi报告的传输方法、终端及网络设备
CN111615142A (zh) * 2019-04-30 2020-09-01 维沃移动通信有限公司 信道状态信息csi报告的传输方法、终端及网络设备

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI HISILICON: "Design of orthogonal basis in advanced CSI", 3GPP DRAFT; R1-1611174, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Reno, USA; 20161114 - 20161118, 13 November 2016 (2016-11-13), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051175155 *

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