WO2022183563A1 - Procédé de rapport de livre de codes, dispositif terminal et dispositif de réseau - Google Patents

Procédé de rapport de livre de codes, dispositif terminal et dispositif de réseau Download PDF

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Publication number
WO2022183563A1
WO2022183563A1 PCT/CN2021/085408 CN2021085408W WO2022183563A1 WO 2022183563 A1 WO2022183563 A1 WO 2022183563A1 CN 2021085408 W CN2021085408 W CN 2021085408W WO 2022183563 A1 WO2022183563 A1 WO 2022183563A1
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WIPO (PCT)
Prior art keywords
csi
resource
terminal device
resources
port
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PCT/CN2021/085408
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English (en)
Chinese (zh)
Inventor
黄莹沛
陈文洪
史志华
田杰娇
方昀
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Oppo广东移动通信有限公司
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Priority to CN202180092945.9A priority Critical patent/CN116868515A/zh
Publication of WO2022183563A1 publication Critical patent/WO2022183563A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the embodiments of the present application relate to the field of communications, and in particular, to a codebook reporting method, a terminal device, and a network device.
  • a terminal device may report channel state information (Channel State Information, CSI) on a channel state information reference signal (Channel State Information Reference Signal, CSI-RS), and the CSI may include frequency Domain-spatial codebook related information, for example, the DFT vectors of the L spatial beams of W 1 of the frequency domain-spatial codebook, the DFT basis vectors of the M frequency domains of W f , and the quantized etc., the codebook overhead is relatively large, therefore, how to reduce the CSI-RS resource overhead is an urgent problem to be solved.
  • CSI Channel State Information
  • CSI-RS Channel State Information Reference Signal
  • the present application provides a codebook reporting method, terminal device and network device, which are beneficial to reduce CSI-RS resource overhead.
  • a first aspect provides a codebook reporting method, comprising: a terminal device receiving a channel state information reference signal CSI-RS resource set sent by a network device, wherein the CSI-RS resource set includes Ks CSI-RS resources , each CSI-RS resource includes at least one CSI-RS port, where Ks is an integer greater than or equal to 1; the terminal device determines the channel state information CSI according to the CSI-RS resource set and/or CSI-related parameters, Wherein, the CSI includes a precoding matrix indication PMI; the terminal device reports the CSI to the network device.
  • a codebook reporting method including: a network device sending a channel state information reference signal CSI-RS resource set to a terminal device, wherein the CSI-RS resource set includes Ks CSI-RS resources, Each CSI-RS resource includes at least one CSI-RS port, where Ks is an integer greater than or equal to 1; the network device reports channel state information CSI to the terminal device, and the CSI is based on the CSI-RS resource Where the set and/or CSI-related parameters are determined, the CSI includes a precoding matrix indicating PMI.
  • a terminal device for executing the method in the above-mentioned first aspect or each implementation manner thereof.
  • the terminal device includes a functional module for executing the method in the above-mentioned first aspect or each implementation manner thereof.
  • a network device for executing the method in the second aspect or each of its implementations.
  • the network device includes functional modules for executing the methods in the second aspect or the respective implementation manners thereof.
  • a terminal device including a processor and a memory.
  • the memory is used for storing a computer program
  • the processor is used for calling and running the computer program stored in the memory to execute the method in the above-mentioned first aspect or each implementation manner thereof.
  • a network device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or each of its implementations.
  • a chip is provided for implementing any one of the above-mentioned first aspect to the second aspect or the method in each implementation manner thereof.
  • the chip includes: a processor for invoking and running a computer program from a memory, so that a device in which the device is installed executes any one of the above-mentioned first to second aspects or each of its implementations method.
  • a computer-readable storage medium for storing a computer program, the computer program causing a computer to execute the method in any one of the above-mentioned first aspect to the second aspect or each of its implementations.
  • a computer program product comprising computer program instructions, the computer program instructions causing a computer to execute the method in any one of the above-mentioned first to second aspects or the implementations thereof.
  • a computer program which, when run on a computer, causes the computer to perform the method in any one of the above-mentioned first to second aspects or the respective implementations thereof.
  • the network device can configure the terminal device with a set of CSI-RS resources, where the set of CSI-RS resources includes at least one CSI-RS resource, and the terminal device can be based on the set of CSI-RS resources configured by the network device and/or CSI-related parameters are determined, CSI is determined, and CSI is further reported to the network device through the CSI-RS resources in the CSI-RS resource set, which can reduce the CSI-RS resource overhead.
  • FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application.
  • FIG. 2 is a schematic interaction diagram of a method for reporting a codebook according to an embodiment of the present application.
  • FIG. 3 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of a network device provided according to an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of a communication device provided according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of a chip provided according to an embodiment of the present application.
  • FIG. 7 is a schematic block diagram of a communication system provided according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • CDMA Wideband Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • NR New Radio
  • NTN Non-Terrestrial Networks
  • UMTS Universal Mobile Telecommunication System
  • WLAN Wireless Local Area Networks
  • Wireless Fidelity Wireless Fidelity
  • WiFi fifth-generation communication
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • V2X Vehicle to everything
  • the communication system in this embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, a dual connectivity (Dual Connectivity, DC) scenario, or a standalone (Standalone, SA) distribution. web scene.
  • Carrier Aggregation, CA Carrier Aggregation, CA
  • DC Dual Connectivity
  • SA standalone
  • the communication system in the embodiment of the present application may be applied to an unlicensed spectrum, where the unlicensed spectrum may also be considered as a shared spectrum; or, the communication system in the embodiment of the present application may also be applied to a licensed spectrum, where, Licensed spectrum can also be considered unshared spectrum.
  • the embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, where the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • user equipment User Equipment, UE
  • access terminal subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • the terminal device may be a station (STATION, ST) in the WLAN, and may be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a Wireless Local Loop (WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, next-generation communication systems such as end devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.
  • PLMN Public Land Mobile Network
  • the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons, and satellites) superior).
  • the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, and an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city or wireless terminal equipment in smart home, etc.
  • a mobile phone Mobile Phone
  • a tablet computer Pad
  • a computer with a wireless transceiver function a virtual reality (Virtual Reality, VR) terminal device
  • augmented reality (Augmented Reality, AR) terminal Equipment wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city or wireless terminal equipment in smart home, etc.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which are the general term for the intelligent design of daily wear and the development of wearable devices using wearable technology, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-scale, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, which needs to cooperate with other devices such as smart phones.
  • the network device may be a device for communicating with a mobile device, and the network device may be an access point (Access Point, AP) in WLAN, or a base station (Base Transceiver Station, BTS) in GSM or CDMA , it can also be a base station (NodeB, NB) in WCDMA, it can also be an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or in-vehicle equipment, wearable devices and NR networks
  • the network device may have a mobile feature, for example, the network device may be a mobile device.
  • the network device may be a satellite or a balloon station.
  • the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a High Elliptical Orbit (HEO) ) satellite etc.
  • the network device may also be a base station set in a location such as land or water.
  • a network device may provide services for a cell, and a terminal device communicates with the network device through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device (
  • the cell can belong to the macro base station, or it can belong to the base station corresponding to the small cell (Small cell).
  • Pico cell Femto cell (Femto cell), etc.
  • These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal device 120 (or referred to as a communication terminal, a terminal).
  • the network device 110 may provide communication coverage for a particular geographic area, and may communicate with terminal devices located within the coverage area.
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and the coverage of each network device may include other numbers of terminal devices. This application The embodiment does not limit this.
  • the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.
  • a device having a communication function in the network/system may be referred to as a communication device.
  • the communication device may include a network device 110 and a terminal device 120 with a communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as other network entities such as a network controller, a mobility management entity, etc., which are not limited in this embodiment of the present application.
  • the "instruction" mentioned in the embodiments of the present application may be a direct instruction, an indirect instruction, or an associated relationship.
  • a indicates B it can indicate that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indicates B indirectly, such as A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • corresponding may indicate that there is a direct or indirect corresponding relationship between the two, or may indicate that there is an associated relationship between the two, or indicate and be instructed, configure and be instructed configuration, etc.
  • predefinition may be implemented by pre-saving corresponding codes, forms, or other means that can be used to indicate relevant information in devices (for example, including terminal devices and network devices).
  • the implementation method is not limited.
  • predefined may refer to the definition in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, may include the LTE protocol, the NR protocol, and related protocols applied in future communication systems, which are not limited in this application.
  • the frequency domain-space codebook (also known as the NR type (type) II codebook, or the frequency domain-space joint codebook) is in the frequency domain. Domain (each subband) is independently coded. Due to the high spatial quantization accuracy, the total feedback amount is too large. By feeding back the frequency domain-spatial joint codebook, the feedback amount can be greatly saved under the condition of ensuring the NR performance.
  • the frequency domain-spatial codebook can be expressed as:
  • W represents the frequency domain-spatial codebook
  • W 1 represents the discrete Fourier transform (Discrete fourier transformation, DFT) vectors of 2L spatial beams (beams)
  • W f represents the DFT basis vectors of M frequency domains.
  • W 1 can be represented by 2N 1 N 2 *2L, where N 1 is the number of ports in the vertical direction, and N 2 is the number of ports in the horizontal direction. It can be represented by 2L*M, and the value of 2L is The number of rows, M is the number of columns. It can be represented by M*N 3 , where N 3 is the number of DFT basis vectors in the frequency domain.
  • the content of the channel information (such as Channel State Information (CSI)) reported to the network device includes: DFT vectors of the L spatial beams of W 1 , W The M frequency-domain DFT basis vectors of f , and the quantized The network device obtains the downlink CSI of each layer through the product of the three.
  • CSI Channel State Information
  • the base station obtains the statistical characteristics of uplink space and delay through the uplink Sounding Reference Signal (SRS), and determines the spatial and frequency domains.
  • the precoding matrix or the joint precoding matrix is used to precode the channel state information reference signal (Channel State Information Reference Signal, CSI-RS).
  • the terminal device estimates the CSI-RS and selects one or more ports, and reports the port's Amplitude and phase information.
  • CSI-RS Channel State Information Reference Signal
  • the terminal device estimates the CSI-RS and selects one or more ports, and reports the port's Amplitude and phase information.
  • the dimension of Wi is f ⁇ Nt
  • f is the size of frequency domain precoding
  • Nt is the number of antennas, which is calculated by the base station.
  • the signal sent by the originator is
  • the existing codebook does not consider the joint distribution of multiple-input multiple-output (MIMO) channel space and delay, and the codebook overhead is relatively large.
  • MIMO multiple-input multiple-output
  • the CSI is reported on the resource, and the CSI includes codebook related information. Therefore, how to reduce the CSI-RS resource overhead is an urgent problem to be solved.
  • FIG. 2 is a schematic interaction diagram of a codebook reporting method 200 according to an embodiment of the present application. As shown in FIG. 2 , the method 200 includes the following contents:
  • a terminal device receives a channel state information reference signal CSI-RS resource set sent by a network device, where the CSI-RS resource set includes Ks CSI-RS resources, and each CSI-RS resource includes at least one CSI-RS port , where Ks is an integer greater than or equal to 1;
  • the terminal device determines channel state information CSI according to the CSI-RS resource set and/or CSI-related parameters, where the CSI includes a precoding matrix indication PMI;
  • the terminal device reports the CSI to the network device.
  • the network device may configure the CSI-RS resource set for the terminal device through high-layer signaling (eg, radio resource control (Radio Resource Control, RRC) signaling).
  • high-layer signaling eg, radio resource control (Radio Resource Control, RRC) signaling.
  • the CSI related parameters include higher layer parameters and/or predefined parameters.
  • the CSI-related parameters may be parameters configured by the network device, or fixed parameters.
  • the CSI-related parameters may include any parameters used to determine CSI, and the parameters that may be included in the CSI-related parameters will be described with reference to subsequent embodiments.
  • the Ks CSI-RS resources have the same density.
  • the density of the CSI-RS resources is the CSI-RS frequency density of each CSI-RS port of each Physical Resource Block (Physical Resource Block, PRB).
  • the overhead of CSI-RS resources is positively related to the number of ports and the density of CSI-RS resources, that is, the more ports, the greater the overhead, and the greater the density, the greater the overhead, so it can be reduced by designing the number of ports of CSI-RS resources CSI-RS density to reduce CSI-RS overhead.
  • the density of the Ks CSI-RS resources is 0.25, which is beneficial to reduce the CSI-RS resource overhead.
  • the density of the Ks CSI-RS resources is 0.25, and only the total number of ports used for the Ks CSI-RS resources is X, for example, X is ⁇ 32 ⁇ , ⁇ 32, 24 ⁇ , ⁇ 32,24,16 ⁇ one of. In other words, the density of the Ks CSI-RS resources is 0.25 only when the total number of ports of the Ks CSI-RS resources is X.
  • the number of the Ks CSI-RS resources is determined according to the density of the Ks CSI-RS resources.
  • the Ks CSI-RS resources are 1/D CSI-RS resources, where D is the density of the Ks CSI-RS resources.
  • the D is a high-level parameter, or the D is a predefined parameter.
  • the D may be configured by the network device, or a fixed parameter, for example, D is 0.25, 0.5, and so on.
  • the CSI-RS related parameters may include the parameter D.
  • resource block offsets (rb-offsets) of the Ks CSI-RS resources are different. That is, the Ks CSI-RS resources can be distinguished by frequency division multiplexing.
  • the density of the Ks CSI-RS resources is 0.5, and the resource block offset of the first CSI-RS resource of the Ks CSI-RS resources is zero (that is, the first CSI-RS resource corresponds to even resource block RB), the resource block offset of the second CSI-RS resource is 1 (that is, the second CSI-RS resource corresponds to an odd-numbered resource block RB).
  • the density of the Ks CSI-RS resources is 0.25
  • the resource block offset of the first CSI-RS resource of the Ks CSI-RS resources is zero
  • the resource block offset of the second CSI-RS resource is zero.
  • the resource block offset is 1, the resource block offset of the third CSI-RS resource is 2, and the resource block offset of the fourth CSI-RS resource is 3.
  • all CSI-RS resources in the CSI-RS resource set have the same number of CSI-RS ports.
  • Ks is 4, the total number of ports of the 4 CSI-RS resources is 32, and the number of ports of each CSI-RS resource may be 8.
  • all CSI-RS resources in the CSI-RS resource set have different numbers of CSI-RS ports. It should be understood that the different number of CSI-RS ports here does not mean that the number of CSI-RS ports is different for every two CSI-RS resources, but means that there may be different numbers of CSI-RS ports in the CSI-RS resource set. CSI-RS resources.
  • Ks is 4, the total number of ports of the 4 CSI-RS resources is 32, and the number of ports of each CSI-RS resource can be 16, 8, 4, 4 in sequence.
  • the 4 CSI-RS resources The resources may include 4 CSI-RS resources with a density of 0.25.
  • Ks is 2
  • the total number of ports of the two CSI-RS resources is 48
  • the number of ports of each CSI-RS resource may be 32 or 16.
  • the two CSI-RS resources may include 2 CSI-RS resources with a density of 0.5.
  • the number of CSI-RS ports included in the CSI-RS resources in the CSI-RS resource set is a first value, and the first value is 16 and/or 8.
  • the first value may be determined according to a high-level parameter or a predefined parameter.
  • the first value is a fixed value, which is 16 or 8, or the first value is one of 16 and 8.
  • the Ks CSI-RS resources include 2 CSI-RS resources with a density of 0.5, and the total number of ports only used for the Ks CSI-RS resources is a second value, and the second value is at least one of 32, 24, and 16.
  • the second value may be determined according to a high-level parameter or a predefined parameter.
  • the second value is a fixed value
  • the fixed value is 32 or 16 or 24, or the second value is one of 32, 24 and 16.
  • the number of CSI-RS ports included in each CSI-RS resource is 8.
  • the Ks CSI-RS resources include 4 CSI-RS resources with a density of 0.25 only for the Ks CSI-RS resources, the total number of ports is 32, and 3 CSI-RS resources with a density of 0.333
  • the total number of ports used only for the Ks CSI-RS resources is 24, and the total number of ports used only for the Ks CSI-RS resources for two CSI-RS resources with a density of 0.5 is 16.
  • the number of CSI-RS ports of all CSI-RS resources in the CSI-RS resource set does not exceed a first threshold.
  • the first threshold may be configured by a network device or predefined.
  • the first threshold may be a high-level parameter or a predefined parameter (or a fixed parameter).
  • the first threshold may be 32 or 48.
  • the number Ks of CSI-RS resources included in the CSI-RS resource set is determined by the capability of the terminal device.
  • the density of the Ks CSI-RS resources is 0.25, which is determined by the capability of the terminal device.
  • the method 200 further includes:
  • the terminal device determines a target CSI-RS resource among the Ks CSI-RS resources, where the target CSI-RS resource is used to report the CSI.
  • the CSI-RS resource set is further determined for reporting
  • the target CSI-RS resource of the CSI can reduce the overhead of the CSI-RS resource.
  • the target CSI-RS resource may include one CSI-RS resource or multiple CSI-RS resources.
  • the method 200 further includes:
  • the terminal device sends first indication information to the network device, where the first indication information is used to indicate the target CSI-RS resource.
  • the number of CSI-RS resources included in the target CSI-RS resource is one
  • the first indication information includes a CSI-RS resource indicator (CSI-RS Resource Indicator, CRI), and the CRI uses for indicating the one target CSI-RS resource.
  • CRI CSI-RS Resource Indicator
  • the target CSI-RS resource includes multiple CSI-RS resources
  • the first indication information indicates the multiple CSI-RS resources through a bitmap or a combination manner.
  • the first indication information when indicating in a bitmap manner, includes Ks bits.
  • each of the Ks bits corresponds to one CSI-RS resource among the Ks CSI-RS resources, and the value of each bit is used to indicate whether the corresponding CSI-RS resource is used for reporting CSI.
  • the first indication information when the indication is in a combined manner, includes bits, where the K is the number of the multiple CSI-RS resources, Indicates rounded up.
  • the K is a high-level parameter or a predefined parameter.
  • the CSI-related parameters may include the K.
  • the K is determined according to the Ks.
  • the CSI-related parameters may include the first coefficient x.
  • the method 200 further includes:
  • the terminal device does not send the CRI to the network device.
  • the fact that the target CSI-RS resources include the Ks CSI-RS resources can be understood as the terminal equipment does not select CSI-RS resources, but reports CSI through all CSI-RS resources.
  • the method 200 further includes:
  • the target CSI-RS resource includes CSI-RS resources 0 to 3, wherein CSI-RS resource 0 includes CSI-RS ports 0 to 7, CSI-RS resource 1 includes CSI-RS ports 8 to 15, and CSI-RS resource 1 includes CSI-RS ports 8 to 15.
  • - RS resource 2 includes CSI-RS ports 16-23, and CSI-RS resource 3 includes CSI-RS ports 24-31.
  • Table 1 shows a mapping manner of PMI port serial numbers.
  • the Ks CSI-RS resources are one CSI-RS resource, and the one CSI-RS resource includes multiple CSI-RS port groups.
  • the densities of the multiple CSI-RS port groups are the same.
  • the density of the plurality of CSI-RS port groups is 0.25.
  • the density of the plurality of CSI-RS port groups is 0.25 and only the total number of ports for the one CSI-RS resource is 32, 24 or 16.
  • the number of CSI-RS port groups included in the one CSI-RS resource is configured by the network device, or is predefined.
  • the number of CSI-RS port groups included in the one CSI-RS resource is determined according to the density of the multiple CSI-RS port groups.
  • the one CSI-RS resource includes 1/P CSI-RS port groups, where P is the density of the multiple CSI-RS port groups.
  • the P is a high-level parameter, or the P is a predefined parameter.
  • the P may be configured by a network device, or a fixed parameter, for example, P is 0.25, 0.5, and so on.
  • the CSI-RS related parameters may include the parameter P.
  • resource block offsets (rb-offsets) of the multiple CSI-RS port groups are different.
  • the density of the multiple CSI-RS port groups is 0.5, and the resource block offset of the first CSI-RS port group of the multiple CSI-RS port groups is zero (that is, the first CSI-RS port group is The RS port group corresponds to an even-numbered resource block RB), and the resource block offset of the second CSI-RS port group is 1 (that is, the second CSI-RS port group corresponds to an odd-numbered resource block RB).
  • the density of the multiple CSI-RS port groups is 0.25
  • the resource block offset of the first CSI-RS port group of the multiple CSI-RS port groups is zero
  • the second CSI-RS port group has zero offset.
  • the resource block offset of the RS port group is 1
  • the resource block offset of the third CSI-RS port group is 2
  • the resource block offset of the fourth CSI-RS port group is 3.
  • each CSI-RS port group in the multiple CSI-RS port groups includes the same number of CSI-RS ports. For example, if the total number of ports of the one CSI-RS resource is 32, and the multiple CSI-RS port groups are 4 CSI-RS port groups, the number of CSI-RS ports included in each CSI-RS port group is 8 .
  • each CSI-RS port group in the multiple CSI-RS port groups includes a different number of CSI-RS ports. It should be understood that the different number of CSI-RS ports included in each CSI-RS port group here does not mean that the number of CSI-RS ports included in every two CSI-RS port groups is different, but that the multiple CSI-RS port groups include different numbers of CSI-RS ports. There may be CSI-RS port groups with different numbers of CSI-RS ports in the RS port group.
  • the number of CSI-RS ports included in each CSI-RS port group may be sequentially as follows 16, 8, 4, and 4.
  • the 4 CSI-RS port groups may include 4 CSI-RS port groups with a density of 0.25.
  • the number of CSI-RS ports included in each CSI-RS port group may be 32 and 16.
  • the two CSI-RS port groups may include two CSI-RS port groups with a density of 0.5.
  • the number of CSI-RS ports included in the one CSI-RS resource is a first value, and the first value is 16 and/or 8.
  • the first value may be determined according to high-level parameters and/or predefined parameters.
  • the first value is a fixed value, which is 16 or 8, or the first value is one of 16 and 8.
  • the one CSI-RS resource includes two CSI-RS port groups with a density of 0.5, and the total number of ports used only for the one CSI-RS resource is a second value, and the second value is 32 and/or 16.
  • the second value is a fixed value, which is 32 or 16, or the second value is one of 32 and 16.
  • the number of CSI-RS ports included in the one CSI-RS resource is 8.
  • the one CSI-RS resource includes 4 CSI-RS ports with a density of 0.25, and only the total number of ports used for the one CSI-RS resource is 32.
  • the total number of CSI-RS ports of the one CSI-RS resource does not exceed the second threshold.
  • the second threshold may be configured by the network device or predefined.
  • the second threshold may be a high-level parameter or a predefined parameter.
  • the second threshold may be 32 or 48.
  • the number of CSI-RS port groups included in the one CSI-RS resource is determined by the capability of the terminal device.
  • the density of the multiple CSI-RS port groups is 0.25, which is determined by the capability of the terminal device.
  • the CSI-RS port group included in the one CSI-RS resource is one or more Code Division Multiplexing (Code Division Multiplexing, CDM) groups.
  • the one CSI-RS resource includes 4 CDM groups.
  • the CSI-RS positions in a time slot are shown in Table 2. For the 18th row in the table, when the total number of ports in multiple CSI-RS port groups is 32, the one CSI-RS resource includes 4 CDM group.
  • each of the four CDM groups corresponds to one resource block offset.
  • two CDM groups in the four CDM groups correspond to one resource block offset.
  • Table 3 shows the correspondence between the density of the CSI-RS port group and the resource block offset.
  • CDM group 0 and CDM group 1 correspond to Rb-offset0
  • CDM group 2 and CDM group 3 correspond to Rb-offset1.
  • CDM group 0 corresponds to Rb-offset0
  • CDM group 1 corresponds to Rb-offset1
  • CDM group 2 corresponds to Rb-offset2
  • CDM group 3 corresponds to Rb-offset3.
  • the ports included in the port groups of CSI-RS resources can be reduced by frequency division multiplexing.
  • the method 200 further includes:
  • the terminal device determines at least one of the following information according to high-level parameters and/or predefined parameters:
  • the number M of frequency domain basis vectors (FD basis) reported by the terminal device where the M is an integer greater than 1;
  • the terminal equipment measures the CSI-RS and/or reports the window position S and length N of the frequency domain base vector;
  • the terminal device reports the position f 0 of the strongest coefficient (Strongest coefficient indicator, SCI);
  • the M is a prime number, eg, M is 3.
  • the number R of PMI subbands of the CQI subbands is a value from the following set: ⁇ 1, 2, 4 ⁇ , ⁇ 1, 2, 4, 8 ⁇ .
  • the R is one of ⁇ 1,2,4 ⁇ or ⁇ 1,2,4,8 ⁇ if and only if M>1.
  • the terminal device may measure the CSI-RS and the window position and length of the frequency domain base vector reported by the terminal device may be the same or may be different.
  • the terminal device measures the CSI-RS and/or the window position and length of the frequency domain basis vector reported by the terminal device may include:
  • the terminal device measures the window position S1 and length N1 of the CSI-RS, and/or,
  • the terminal device reports the window position S2 and the length N2 of the frequency domain basis vector.
  • S1 and S2 may be the same or different, and N1 and N2 may be the same or different.
  • the S is zero.
  • the window position S may be determined according to the number of PMI subbands.
  • the a may be one of ⁇ 2, 4 ⁇ .
  • the CSI related parameters may include the parameter a.
  • the N is a prime number, such as 1, 3, 5, 7, etc.
  • multiple terminal devices may multiplex CSI-RS resources in a time-division manner.
  • the position where different terminal devices report the strongest coefficients may be time-divisional, or the terminal device reports the window position S of the frequency domain basis vector. It can be time-division, which is beneficial to reduce the CSI-RS resource overhead.
  • the window starting position S may be configured by the network device or predefined.
  • the network device may configure the window start position S through high-level signaling, such as radio resource control signaling (Radio Resource Control, RRC) or physical layer signaling, such as downlink control information (Downlink Control Information, DCI).
  • RRC Radio Resource Control
  • DCI Downlink Control Information
  • the f 0 is zero.
  • the position f 0 where the strongest coefficient is reported may be determined according to high-level parameters.
  • the higher layer parameter may include the number of PMI subbands.
  • the b may be one of ⁇ 2, 4 ⁇ .
  • the CSI-related parameters may include the parameter b.
  • the sequence numbers of the M FD basis calculated by the terminal device are f 0 , f 1 , . 0 .
  • the frequency-domain basis vector f ⁇ mod(M initial +i, N 3 ), i 0, 1, . operation.
  • the rank is equal to 1
  • the maximum number of non-zero coefficients is K0
  • the rank (rank) is greater than 1
  • the total maximum number of non-zero coefficients in all layers is
  • the rank is equal to 1, and the maximum number of non-zero coefficients is If the rank is greater than 1, the total maximum number of non-zero coefficients in all layers is
  • the ⁇ may be a high-level parameter or a predefined parameter.
  • ⁇ may be configured by the network device, or predefined.
  • K0 is determined according to the total number P CSI-RS of CSI ports used for reporting CSI, for example, Used to limit CSI reporting overhead.
  • P CSI-RS may be the total number of CSI-RS ports included in the target CSI-RS resource, or, if the terminal device transmits CSI through all CSI-RS resources in the CSI-RS resource set, the P CSI-RS may be is the number of CSI-RS ports included in all CSI-RS resources.
  • the ⁇ can be a high-level parameter or a predefined parameter.
  • ⁇ can be configured by the network device, or predefined.
  • the ⁇ may be a high-level parameter or a predefined parameter.
  • ⁇ may be configured by the network device, or predefined.
  • the CSI-related parameters may include one or more of the ⁇ , ⁇ , and ⁇ .
  • the S203 may include:
  • the terminal device reports the PMI to the network device.
  • the terminal device reports the PMI to the network device, including at least one of the following:
  • the terminal equipment reports the strongest coefficient SCI
  • the terminal device reports a non-zero coefficient
  • the terminal equipment reports the CQI
  • the terminal device reports first indication information, where the first indication information is used to determine the strongest coefficient.
  • the first indication information includes port location indication information and/or frequency domain location indication information.
  • the port position indication information is used to indicate the position of a CSI-RS port used for reporting CSI-RS resources of CSI.
  • the frequency domain location indication information is used to indicate frequency domain location information of the strongest coefficients.
  • the frequency domain position indication information is used to indicate the offset of the frequency domain position of the strongest coefficient relative to the starting position S of the window, which is denoted as f ⁇ .
  • the frequency-domain position indication information is used to indicate the absolute frequency-domain position of the strongest coefficient, wherein the absolute frequency-domain position of the strongest coefficient is based on the window start position S and relative to the window start position S The offset f ⁇ is determined.
  • the absolute frequency domain position of the strongest coefficient is determined by mod(S+f ⁇ , N3 ), where N3 represents the number of PMI subbands.
  • the window start position S may be configured by the network device or predefined, for example, the network device configures the S through RRC signaling or DCI.
  • the terminal device may perform a cyclic shift operation on each layer, so that the offset f ⁇ of the frequency domain position of the strongest coefficient of each layer relative to the starting position S of the window is the same. That is, all layers can use a common f ⁇ , so that when reporting frequency domain location indication information, only one frequency domain location indication information can be reported, which is beneficial to reduce CSI overhead.
  • the offset f ⁇ of the frequency domain position of the strongest coefficient relative to the window start position S may be determined according to the window length N.
  • f ⁇ may be determined according to N and coefficient k, for example, k may be 1/2, 1/3, etc.
  • f ⁇ N/2.
  • the window length N may be configured by the network device or predefined, for example, the network device configures the N through RRC signaling or DCI.
  • the window start position S and length N are used to determine the window for reporting the frequency domain basis vector.
  • k may be configured by the network device, or pre-defined, such as through higher layer signaling or DCI.
  • the offset f ⁇ of the frequency domain position of the strongest coefficient relative to the starting position S of the window may be configured by the network device, or pre-defined, for example, the network device configures the f ⁇ through high-layer signaling or DCI .
  • the bit width of the port position indication information may be determined according to K 1 bits or 2L bits, for example, K 1 bits or 2L bits, or bits or bits.
  • K 1 , 2L represents the number of CSI-RS ports selected by the terminal device for reporting CSI-RS resources for CSI.
  • the bit width of the frequency domain location indication information may be determined according to the window length N, for example, N bits or bits.
  • the terminal device reports the port location indication information corresponding to each layer, that is, the port location indication information is layer-granular.
  • the total bit width occupied by the location information can be v K 1 -bit or 2L-bit, or v bits or bits.
  • the terminal device when the number of layers v is greater than 1, for each layer, the terminal device reports one frequency domain location indication information, that is, all layers can use common frequency domain location indication information.
  • the total bit width occupied by the frequency domain location information reported by the terminal equipment may be N bits or bits.
  • the terminal device passes The bit reports the frequency domain basis vector of each layer or all layers.
  • the terminal device is The starting position of the window of the frequency-domain basis vector of the bit-reported basis vector corresponds to the M initial described above.
  • each layer starts with Bit reporting, or the corresponding frequency-domain basis vectors of each layer are the same.
  • the terminal device is or The strongest coefficient is reported in bits, wherein K 1 , 2L represents the number of CSI-RS ports selected by the terminal device for reporting CSI-RS resources for CSI.
  • the terminal device passes the bit reporting the strongest coefficient, where K NZ represents the total number of non-zero coefficients in all layers;
  • the terminal device passes the The bit reports the strongest coefficient of each layer, where ⁇ is a high-level parameter or a predefined parameter, and the determination method of K0 refers to the foregoing embodiments.
  • the terminal device passes the bit reporting the strongest coefficient, where K NZ represents the total number of non-zero coefficients in all layers;
  • the terminal device passes the Bits report the strongest coefficient for each layer.
  • the terminal device passes the bit reporting the strongest coefficient
  • the terminal device reports the layer where the strongest coefficient is located, and passes the or The bit reports the position of the strongest coefficient in the layer, where ⁇ is a high-level parameter or a predefined parameter, and reference is made to the foregoing embodiments for the determination method of K0.
  • the terminal device if M is greater than 1, for each CSI-RS port used by the terminal device to report CSI, for example, the CSI-RS port included in the target CSI-RS resource, the terminal device only reports one non-identical CSI-RS port. zero coefficient.
  • the terminal device reports the CQI to the network device, including:
  • the terminal device only reports the wideband CQI, or sets the CQI format indicator (cqi-FormatIndicator) to the wideband CQI (widebandCQI); or
  • the terminal device reports the subband CQI, or sets the CQI format indicator (cqi-FormatIndicator) as subband CQI (subbandCQI).
  • the method 200 further includes:
  • the terminal device calculates the CQI according to at least one CSI-RS resource used for reporting CSI.
  • the terminal device calculates the CQI according to the target CSI-RS resource, and the target CSI-RS resource may include part or all of the CSI-RS resource in the CSI-RS resource set.
  • the method 200 further includes:
  • the terminal device determines the CQI subband size according to higher layer parameters or predefined parameters.
  • the CQI subband size may refer to the number of physical resource blocks (physical resource blocks, PRBs) included in each CQI subband.
  • the CQI subband size According to the reported bandwidth and the first parameter d1, where the first parameter is a high-level parameter or a predefined parameter.
  • the CQI subband size According to the nominal subband size and the second parameter d2, where the second parameter d2 is a high-level parameter or a predefined parameter.
  • the nominal subband size It is determined according to the Band Width Part (Band Width Part, BWP) size and the high-layer parameter subbandSize.
  • the CQI subband size can be determined according to a specific bandwidth and a scaling factor.
  • the specific bandwidth can be the reporting bandwidth or the nominal subband size described above, or can also be other reference bandwidths
  • the scaling factor can be a higher layer parameters, or predefined parameters.
  • the scaling factor can be 1, 1/2 or 1/4, etc.
  • the network device may configure a CSI-RS resource set for the terminal device, where the CSI-RS resource set includes at least one CSI-RS resource, and the terminal device is based on the CSI-RS resource set configured by the network device. and/or CSI-related parameters, determine CSI, and further report CSI to the network device through the CSI-RS resources in the CSI-RS resource set, which can reduce the CSI-RS resource overhead.
  • the embodiments of the present application can compress codebook overhead, improve feedback efficiency, and improve system robustness by estimating the characteristics of space domain and time delay (DFT transform domain) from SRS.
  • DFT transform domain space domain and time delay
  • the ports included in the port groups of CSI-RS resources can be reduced by frequency division multiplexing.
  • multiple terminal devices can time-division multiplex the same physical resources to reduce CSI-RS resource overhead.
  • the channel becomes flat, and the channel information can be well reflected by simple parameter configuration (for example, one or two FD/large subband bandwidth), while reducing the complexity of UE implementation.
  • FIG. 3 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application.
  • the terminal device 300 includes:
  • the communication unit 310 is configured to receive a channel state information reference signal CSI-RS resource set sent by a network device, wherein the CSI-RS resource set includes Ks CSI-RS resources, and each CSI-RS resource includes at least one CSI-RS resource.
  • a processing unit 320 configured to determine channel state information CSI according to the CSI-RS resource set and/or CSI-related parameters, where the CSI includes a precoding matrix indication PMI;
  • the communication unit 310 is further configured to report the CSI to the network device.
  • the CSI related parameters include higher layer parameters and/or predefined parameters.
  • the density of the Ks CSI-RS resources is the same, and the density of the Ks CSI-RS resources is 0.25.
  • the density of the Ks CSI-RS resources is 0.25 only for the total number of ports of the Ks CSI-RS resources to be 32.
  • the Ks CSI-RS resources are 1/D CSI-RS resources, where D is the density of the Ks CSI-RS resources.
  • the D is a high-level parameter, or the D is a predefined parameter.
  • the resource block offsets of the Ks CSI-RS resources are different.
  • the density of the Ks CSI-RS resources is 0.5
  • the resource block offset of the first CSI-RS resource of the Ks CSI-RS resources is zero
  • the second CSI-RS resource The resource block offset is 1;
  • the density of the Ks CSI-RS resources is 0.25, the resource block offset of the first CSI-RS resource of the Ks CSI-RS resources is zero, and the resource block offset of the second CSI-RS resource is 1.
  • the resource block offset of the third CSI-RS resource is 2, and the resource block offset of the fourth CSI-RS resource is 3.
  • the number of CSI-RS ports included in each CSI-RS resource is a first value, the first value is 16 and/or 8, and the Ks CSI-RS resources include 2 densities
  • a CSI-RS resource of 0.5 is only used for the total number of ports of the Ks CSI-RS resources is a second value, and the second value is 32 and/or 16.
  • the number of CSI-RS ports included in each CSI-RS resource is 8, and the Ks CSI-RS resources include 4 CSI-RS resources with a density of 0.25 only for the Ks CSI-RS resources
  • the total number of ports for CSI-RS resources is 32.
  • the number of CSI-RS ports of all CSI-RS resources in the CSI-RS resource set does not exceed a first threshold.
  • all CSI-RS resources in the CSI-RS resource set have the same number of CSI-RS ports.
  • all CSI-RS resources in the CSI-RS resource set have different numbers of CSI-RS ports.
  • the number Ks of CSI-RS resources included in the CSI-RS resource set is determined by the capability of the terminal device, and/or
  • the density of the Ks CSI-RS resources is 0.25, which is determined by the capability of the terminal device.
  • processing unit 320 is further configured to:
  • a target CSI-RS resource is determined among the Ks CSI-RS resources, and the target CSI-RS resource is used for reporting the CSI.
  • the communication unit 310 is further configured to:
  • the number of CSI-RS resources included in the target CSI-RS resource is one, and the first indication information includes a CSI-RS resource indication CRI, where the CRI is used to indicate the one target CSI-RS resource.
  • the target CSI-RS resource includes multiple CSI-RS resources, and the first indication information indicates the multiple CSI-RS resources through a bitmap or a combination manner.
  • the first indication information includes Ks bits, or, bits, where the K is the number of the multiple CSI-RS resources, Indicates rounded up.
  • the K is a high-level parameter or a predefined parameter, or the K is determined according to the Ks.
  • the K is determined according to the Ks and a first coefficient, where the first coefficient is a high-level parameter or a predefined parameter.
  • the communication unit 310 is further configured to:
  • the target CSI-RS resource includes the Ks CSI-RS resources, no CRI is sent to the network device.
  • the target CSI-RS resource includes multiple CSI-RS resources, and the method further includes:
  • each CSI-RS resource in the plurality of CSI-RS resources For each CSI-RS resource in the plurality of CSI-RS resources, set the port sequence number of the PMI from the first CSI-RS port of each CSI-RS resource to the port number of each CSI-RS resource The last CSI-RS port is mapped sequentially.
  • the Ks CSI-RS resources are one CSI-RS resource, and the one CSI-RS resource includes multiple CSI-RS port groups.
  • the densities of the plurality of CSI-RS port groups are the same, and the densities of the plurality of CSI-RS port groups are 0.25.
  • the density of the plurality of CSI-RS port groups is 0.25 and only the total number of ports used for the one CSI-RS resource is 32.
  • the one CSI-RS resource includes 1/P CSI-RS port groups, where P is the density of the plurality of CSI-RS port groups.
  • the P is a high-level parameter, or the P is a predefined parameter.
  • the resource block offsets of the plurality of CSI-RS port groups are different.
  • the density of the plurality of CSI-RS port groups is 0.5, the resource block offset of the first CSI-RS port group of the plurality of CSI-RS port groups is zero, and the second CSI-RS port group has zero offset.
  • the resource block offset of the RS port group is 1; or
  • the density of the multiple CSI-RS port groups is 0.25, the resource block offset of the first CSI-RS port group of the multiple CSI-RS port groups is zero, and the resources of the second CSI-RS port group
  • the block offset is 1, the resource block offset of the third CSI-RS port group is 2, and the resource block offset of the fourth CSI-RS port group is 3.
  • the number of CSI-RS ports included in the one CSI-RS resource is a first value, the first value is 16 and/or 8, and the one CSI-RS resource includes 2 ports with a density of 0.5
  • the total number of ports of the CSI-RS port group used only for the one CSI-RS resource is a second value, and the second value is 32 and/or 16.
  • the number of CSI-RS ports included in the one CSI-RS resource is 8, and the number of CSI-RS ports included in the one CSI-RS resource with a density of 0.25 is only used for the one CSI-RS
  • the total number of ports for RS resources is 32.
  • the total number of CSI-RS ports of the one CSI-RS resource does not exceed the second threshold.
  • each CSI-RS port group in the multiple CSI-RS port groups includes the same number of CSI-RS ports.
  • each CSI-RS port group in the multiple CSI-RS port groups includes a different number of CSI-RS ports.
  • the number of CSI-RS port groups included in the one CSI-RS resource is determined by the capability of the terminal device, and/or
  • the density of the plurality of CSI-RS port groups of 0.25 is determined by the capability of the terminal device. 36. The method according to any one of claims 23-35, wherein the CSI-RS port group is one or more code division multiplexing CDM groups.
  • the one CSI-RS resource includes 4 CDM groups.
  • each of the four CDM groups corresponds to a resource block offset
  • the density of the multiple CSI-RS port groups is 0.5, two CDM groups in the four CDM groups correspond to one resource block offset.
  • processing unit 320 is further configured to:
  • At least one of the following information is determined based on high-level parameters and/or predefined parameters:
  • the terminal equipment measures the CSI-RS and/or reports the window position S and length N of the frequency domain base vector;
  • the terminal equipment reports the position f 0 of the strongest coefficient
  • the M is a prime number.
  • the R is one of the following set of values: ⁇ 1,2,4 ⁇ , ⁇ 1,2,4,8 ⁇ .
  • the R is a value of ⁇ 1, 2, 4, 8 ⁇ if and only if M>1.
  • the S is zero; or
  • the N is a prime number.
  • the f 0 is zero; or
  • the frequency-domain basis vector f ⁇ mod(M initial +i, N 3 ), i 0, 1, . operation.
  • the rank is equal to 1
  • the maximum number of non-zero coefficients is K0
  • the rank is greater than 1
  • the total maximum number of non-zero coefficients in all layers is
  • the rank is equal to 1, and the maximum number of non-zero coefficients is If the rank is greater than 1, the total maximum number of non-zero coefficients in all layers is
  • P CSI-RS is the total number of CSI-RS ports used for reporting CSI, where ⁇ 1, ⁇ 1, and ⁇ 1.
  • the ⁇ is a higher layer parameter or a predefined parameter
  • the ⁇ is a higher layer parameter or a predefined parameter
  • the ⁇ is a higher layer parameter or a predefined parameter
  • the ⁇ is a higher layer parameter or a predefined parameter
  • the communication unit 310 is further configured to:
  • the communication unit 310 is further configured to perform at least one of the following:
  • the terminal device is The bit reports the frequency domain basis vector of each layer or all layers.
  • the terminal device is Bit reports the starting position of the window of the frequency-domain basis vector, where each layer starts with bit reporting, or the corresponding frequency domain base vector of each layer is the same.
  • the terminal device is or The strongest coefficient is reported in bits, wherein K 1 , 2L represents the number of CSI-RS ports selected by the terminal device for reporting CSI-RS resources of CSI.
  • the terminal device passes bit reporting the strongest coefficient, where K NZ represents the total number of non-zero coefficients in all layers;
  • the terminal device passes the Bits report the strongest coefficient of each layer, where ⁇ is a high-level parameter or a predefined parameter, P CSI-RS is the total number of CSI-RS ports used for reporting CSI.
  • the terminal device passes bit reporting the strongest coefficient, where K NZ represents the total number of non-zero coefficients in all layers;
  • the terminal device passes the Bits report the strongest coefficient of each layer, where,
  • the terminal device passes bit reporting the strongest coefficient
  • the terminal device reports the layer where the strongest coefficient is located, and passes the or The bit reports the position of the strongest coefficient in the layer, where ⁇ is a high-level parameter or a predefined parameter,
  • the terminal device if M is greater than 1, for each CSI-RS port used by the terminal device to report CSI, the terminal device only reports one non-zero coefficient.
  • the communication unit 310 is further configured to:
  • processing unit 320 is further configured to:
  • the CQI is determined according to at least one CSI-RS resource for reporting CSI.
  • processing unit 320 is further configured to:
  • the CQI subband size is determined according to higher layer parameters or predefined parameters.
  • the CQI subband size is determined according to the reporting bandwidth and a first parameter, where the first parameter is a higher layer parameter or a predefined parameter.
  • the CQI subband size is determined based on a nominal subband size and a second parameter, the second parameter being a higher layer parameter or a predefined parameter, wherein the nominal subband size is based on the bandwidth part BWP
  • the size and high layer parameters are determined by the subband size.
  • the first indication information includes port location indication information and/or frequency domain location indication information.
  • the port position indication information is used to indicate the position of a CSI-RS port used for reporting CSI-RS resources of CSI.
  • the frequency domain location indication information is used to indicate frequency domain location information of the strongest coefficients.
  • the frequency domain position indication information is used to indicate the offset f ⁇ of the frequency domain position of the strongest coefficient relative to the window position S, or
  • the frequency domain position indication information is used to indicate the absolute frequency domain position of the strongest coefficient.
  • the absolute frequency domain position of the strongest coefficient is determined by mod(S+f ⁇ , N3), where N3 represents the number of PMI subbands, and f ⁇ represents the frequency domain position of the strongest coefficient relative to the The offset of the window position S.
  • the offset f ⁇ of the frequency domain position of the strongest coefficient corresponding to each layer relative to the window position S is the same.
  • the offset f ⁇ of the frequency domain position of the strongest coefficient relative to the window position S is determined according to the window length N, or is configured by the network device, or is predefined.
  • the bit width of the port location indication information may be K 1 bits or 2L bits, or bits or bits.
  • the bit width of the frequency domain location indication information may be N bits or bits, where N represents the window length.
  • the terminal device reporting the first indication information includes:
  • the terminal device reports V port location indication information and one frequency domain location indication information.
  • the S is configured or predefined by the network device.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • terminal device 300 may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of the various units in the terminal device 300 are respectively for realizing the method shown in FIG. 2 .
  • the corresponding process of the terminal device in 200 is not repeated here for brevity.
  • FIG. 4 is a schematic block diagram of a network device according to an embodiment of the present application.
  • the network device 400 of FIG. 4 includes:
  • a communication unit 410 configured to send a channel state information reference signal CSI-RS resource set to a terminal device, wherein the CSI-RS resource set includes Ks CSI-RS resources, and each CSI-RS resource includes at least one CSI-RS port, where Ks is an integer greater than or equal to 1;
  • the communication unit 420 is further configured to receive channel state information CSI reported by the terminal equipment, where the CSI is determined according to the CSI-RS resource set and/or CSI-related parameters, wherein the CSI includes a precoding matrix Indicates PMI.
  • the CSI related parameters include higher layer parameters and/or predefined parameters.
  • the density of the Ks CSI-RS resources is the same, and the density of the Ks CSI-RS resources is 0.25.
  • the density of the Ks CSI-RS resources is 0.25 only for the total number of ports of the Ks CSI-RS resources to be 32.
  • the Ks CSI-RS resources are 1/D CSI-RS resources, where D is the density of the Ks CSI-RS resources.
  • the D is a high-level parameter, or the D is a predefined parameter.
  • the resource block offsets of the Ks CSI-RS resources are different.
  • the density of the Ks CSI-RS resources is 0.5
  • the resource block offset of the first CSI-RS resource of the Ks CSI-RS resources is zero
  • the second CSI-RS resource The resource block offset is 1;
  • the density of the Ks CSI-RS resources is 0.25, the resource block offset of the first CSI-RS resource of the Ks CSI-RS resources is zero, and the resource block offset of the second CSI-RS resource is 1.
  • the resource block offset of the third CSI-RS resource is 2, and the resource block offset of the fourth CSI-RS resource is 3.
  • the number of CSI-RS ports included in each CSI-RS resource is a first value, the first value is 16 and/or 8, and the Ks CSI-RS resources include 2 densities
  • a CSI-RS resource of 0.5 is only used for the total number of ports of the Ks CSI-RS resources is a second value, and the second value is 32 and/or 16.
  • the number of CSI-RS ports included in each CSI-RS resource is 8, and the Ks CSI-RS resources include 4 CSI-RS resources with a density of 0.25 only for the Ks CSI-RS resources
  • the total number of ports for CSI-RS resources is 32.
  • the number of CSI-RS ports of all CSI-RS resources in the CSI-RS resource set does not exceed a first threshold.
  • all CSI-RS resources in the CSI-RS resource set have the same number of CSI-RS ports.
  • all CSI-RS resources in the CSI-RS resource set have different numbers of CSI-RS ports.
  • the number Ks of CSI-RS resources included in the CSI-RS resource set is determined by the capability of the terminal device, and/or
  • the density of the Ks CSI-RS resources is 0.25, which is determined by the capability of the terminal device.
  • the communication unit 410 is further configured to:
  • the number of CSI-RS resources included in the target CSI-RS resource is one, and the first indication information includes a CSI-RS resource indication CRI, where the CRI is used to indicate the one target CSI-RS resource.
  • the target CSI-RS resource includes multiple CSI-RS resources, and the first indication information indicates the multiple CSI-RS resources through a bitmap or a combination manner.
  • the first indication information includes Ks bits, or, bits, where the K is the number of the multiple CSI-RS resources, Indicates rounded up.
  • the K is a high-level parameter or a predefined parameter, or the K is determined according to the Ks.
  • the K is determined according to the Ks and a first coefficient, where the first coefficient is a high-level parameter or a predefined parameter.
  • the target CSI-RS resource includes a plurality of CSI-RS resources, and for each CSI-RS resource in the plurality of CSI-RS resources, the port sequence number of the PMI starts from the each CSI-RS resource.
  • the first CSI-RS port of the CSI-RS resource is sequentially mapped to the last CSI-RS port of each CSI-RS resource.
  • the Ks CSI-RS resources are one CSI-RS resource, and the one CSI-RS resource includes multiple CSI-RS port groups.
  • the densities of the plurality of CSI-RS port groups are the same, and the densities of the plurality of CSI-RS port groups are 0.25.
  • the density of the plurality of CSI-RS port groups is 0.25 and only the total number of ports used for the one CSI-RS resource is 32.
  • the one CSI-RS resource includes 1/P CSI-RS port groups, where P is the density of the plurality of CSI-RS port groups.
  • the P is a high-level parameter, or the P is a predefined parameter.
  • the resource block offsets of the plurality of CSI-RS port groups are different.
  • the density of the plurality of CSI-RS port groups is 0.5, the resource block offset of the first CSI-RS port group of the plurality of CSI-RS port groups is zero, and the second CSI-RS port group has zero offset.
  • the resource block offset of the RS port group is 1; or
  • the density of the multiple CSI-RS port groups is 0.25, the resource block offset of the first CSI-RS port group of the multiple CSI-RS port groups is zero, and the resources of the second CSI-RS port group
  • the block offset is 1, the resource block offset of the third CSI-RS port group is 2, and the resource block offset of the fourth CSI-RS port group is 3.
  • the number of CSI-RS ports included in the one CSI-RS resource is a first value, the first value is 16 and/or 8, and the one CSI-RS resource includes 2 ports with a density of 0.5
  • the total number of ports of the CSI-RS port group used only for the one CSI-RS resource is a second value, and the second value is 32 and/or 16.
  • the number of CSI-RS ports included in the one CSI-RS resource is 8, and the number of CSI-RS ports included in the one CSI-RS resource with a density of 0.25 is only used for the one CSI-RS
  • the total number of ports for RS resources is 32.
  • the total number of CSI-RS ports of the one CSI-RS resource does not exceed the second threshold.
  • each CSI-RS port group in the multiple CSI-RS port groups includes the same number of CSI-RS ports.
  • each CSI-RS port group in the multiple CSI-RS port groups includes a different number of CSI-RS ports.
  • the number of CSI-RS port groups included in the one CSI-RS resource is determined by the capability of the terminal device, and/or
  • the density of the plurality of CSI-RS port groups of 0.25 is determined by the capability of the terminal device. 36. The method according to any one of claims 23-35, wherein the CSI-RS port group is one or more code division multiplexing CDM groups.
  • the one CSI-RS resource includes 4 CDM groups.
  • each of the four CDM groups corresponds to a resource block offset
  • the density of the multiple CSI-RS port groups is 0.5, two CDM groups in the four CDM groups correspond to one resource block offset.
  • the communication unit 410 is further configured to:
  • the communication unit 410 is further configured to perform at least one of the following:
  • the terminal device is The bit reports the frequency domain basis vector of each layer or all layers.
  • the terminal device is Bit reports the starting position of the window of the frequency-domain basis vector, where each layer starts with bit reporting, or the corresponding frequency domain base vector of each layer is the same.
  • the terminal device is or The strongest coefficient is reported in bits, wherein K 1 , 2L represents the number of CSI-RS ports selected by the terminal device for reporting CSI-RS resources for CSI.
  • the terminal device passes bit reporting the strongest coefficient, where K NZ represents the total number of non-zero coefficients in all layers;
  • the terminal device passes the Bits report the strongest coefficient of each layer, where ⁇ is a high-level parameter or a predefined parameter, P CSI-RS is the total number of CSI-RS ports used for reporting CSI.
  • the terminal device passes bit reporting the strongest coefficient, where K NZ represents the total number of non-zero coefficients in all layers;
  • the terminal device passes the Bits report the strongest coefficient of each layer, where,
  • the terminal device passes bit reporting the strongest coefficient
  • the terminal device reports the layer where the strongest coefficient is located, and passes the or The bit reports the position of the strongest coefficient in the layer, where ⁇ is a high-level parameter or a predefined parameter,
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • the network device 400 may correspond to the network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 400 are respectively for realizing the method shown in FIG. 2 .
  • the corresponding process of the network device in 200 is not repeated here for brevity.
  • FIG. 5 is a schematic structural diagram of a communication device 500 provided by an embodiment of the present application.
  • the communication device 500 shown in FIG. 5 includes a processor 510, and the processor 510 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the communication device 500 may further include a memory 520 .
  • the processor 510 may call and run a computer program from the memory 520 to implement the methods in the embodiments of the present application.
  • the memory 520 may be a separate device independent of the processor 510 , or may be integrated in the processor 510 .
  • the communication device 500 may further include a transceiver 530, and the processor 510 may control the transceiver 530 to communicate with other devices, specifically, may send information or data to other devices, or receive other devices Information or data sent by the device.
  • the transceiver 530 may include a transmitter and a receiver.
  • the transceiver 530 may further include antennas, and the number of the antennas may be one or more.
  • the communication device 500 may specifically be a network device in this embodiment of the present application, and the communication device 500 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For brevity, details are not repeated here. .
  • the communication device 500 may specifically be the mobile terminal/terminal device of the embodiments of the present application, and the communication device 500 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. , and will not be repeated here.
  • FIG. 6 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 600 shown in FIG. 6 includes a processor 610, and the processor 610 can call and run a computer program from a memory, so as to implement the method in this embodiment of the present application.
  • the chip 600 may further include a memory 620 .
  • the processor 610 may call and run a computer program from the memory 620 to implement the methods in the embodiments of the present application.
  • the memory 620 may be a separate device independent of the processor 610 , or may be integrated in the processor 610 .
  • the chip 600 may further include an input interface 630 .
  • the processor 610 may control the input interface 630 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.
  • the chip 600 may further include an output interface 640 .
  • the processor 610 can control the output interface 640 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which is not repeated here for brevity.
  • the chip can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application.
  • the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application.
  • the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application.
  • the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-a-chip, or the like.
  • FIG. 7 is a schematic block diagram of a communication system 700 provided by an embodiment of the present application. As shown in FIG. 7 , the communication system 700 includes a terminal device 710 and a network device 720 .
  • the terminal device 710 can be used to implement the corresponding functions implemented by the terminal device in the above method
  • the network device 720 can be used to implement the corresponding functions implemented by the network device in the above method. For brevity, details are not repeated here. .
  • the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Programming logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (Read-Only Memory, ROM), a programmable read-only memory (Programmable ROM, PROM), an erasable programmable read-only memory (Erasable PROM, EPROM), an electrically programmable read-only memory (Erasable PROM, EPROM). Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory may be Random Access Memory (RAM), which acts as an external cache.
  • RAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM DDR SDRAM
  • enhanced SDRAM ESDRAM
  • synchronous link dynamic random access memory Synchlink DRAM, SLDRAM
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a 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, DDR SDRAM), 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, DR RAM) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.
  • Embodiments of the present application further provide a computer-readable storage medium for storing a computer program.
  • the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application.
  • the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application. , for brevity, will not be repeated here.
  • Embodiments of the present application also provide a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. Repeat.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiments of the present application, For brevity, details are not repeated here.
  • the embodiments of the present application also provide a computer program.
  • the computer program can be applied to the network device in the embodiments of the present application.
  • the computer program When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity. , and will not be repeated here.
  • the computer program may be applied to the mobile terminal/terminal device in the embodiments of the present application, and when the computer program is run on the computer, the mobile terminal/terminal device implements the various methods of the computer program in the embodiments of the present application.
  • the corresponding process for the sake of brevity, will not be repeated here.
  • the disclosed system, apparatus and method may be implemented in other manners.
  • the apparatus embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium.
  • the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

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Abstract

L'invention concerne un procédé de rapport de livre de codes, un dispositif terminal, et un dispositif de réseau. Le procédé comprend : un dispositif terminal reçoit un ensemble de ressources d'informations d'état de canal - signal de référence (CSI-RS) envoyé par un dispositif de réseau, l'ensemble de ressources CSI-RS comprenant Ks ressources CSI-RS, et chaque ressource CSI-RS comprenant au moins un port CSI-RS, dans lequel Ks est un nombre entier supérieur ou égal à 1 ; le dispositif terminal détermine des informations d'état de canal (CSI) selon l'ensemble de ressources CSI-RS et/ou un paramètre lié au CSI, dans lequel le CSI comprend un indicateur de matrice de précodage (PMI) ; et le dispositif terminal rapporte le CSI au dispositif de réseau.
PCT/CN2021/085408 2021-03-02 2021-04-02 Procédé de rapport de livre de codes, dispositif terminal et dispositif de réseau WO2022183563A1 (fr)

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