WO2019137445A1 - Procédé et appareil de mesure d'informations d'état de canal - Google Patents

Procédé et appareil de mesure d'informations d'état de canal Download PDF

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Publication number
WO2019137445A1
WO2019137445A1 PCT/CN2019/071216 CN2019071216W WO2019137445A1 WO 2019137445 A1 WO2019137445 A1 WO 2019137445A1 CN 2019071216 W CN2019071216 W CN 2019071216W WO 2019137445 A1 WO2019137445 A1 WO 2019137445A1
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Prior art keywords
csi
codebooks
resource
codebook
terminal device
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PCT/CN2019/071216
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English (en)
Chinese (zh)
Inventor
梁津垚
黄逸
祝慧颖
李元杰
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • 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
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/026—Co-operative diversity, e.g. using fixed or mobile stations as relays
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality

Definitions

  • the present application relates to the field of communications and, more particularly, to a method and apparatus for measuring channel state information in the field of communications.
  • Coordination multiple point (CoMP) transmission is a method for solving inter-cell interference problems and improving cell edge user throughput.
  • multiple network devices can simultaneously communicate with one terminal device.
  • the primary cooperative network device of the multiple network devices needs to know each network device to the terminal device.
  • the channel condition of the downlink channel is a method for solving inter-cell interference problems and improving cell edge user throughput.
  • the channel state information is used to indicate the channel attribute of the communication link in the communication system.
  • the network device can transmit a channel state information reference signal (CSI-RS).
  • CSI-RS channel state information reference signal
  • the terminal device measures the downlink channel.
  • the terminal device can feed back the measured CSI to the network device, so that the network device knows the channel state of the downlink channel.
  • the network device indicates a CSI-RS resource and a codebook to the terminal device, and the terminal device performs CSI measurement based on the CSI-RS resource and the codebook to obtain CSI of the channel.
  • the present application provides a method and apparatus for measuring channel state information, which is advantageous for improving the accuracy of CSI measurement and thereby improving data transmission performance.
  • the application provides a method for measuring channel state information CSI, the method comprising:
  • the terminal device performs CSI measurement based on the M codebooks according to the first indication information, to obtain L CSIs, at least one CSI of the L CSIs is obtained based on the M codebooks, and L is an integer greater than 0. .
  • L CSIs are obtained, that is, at least one of the L CSIs is based on the M
  • the measurement of the codebook is beneficial to improve the accuracy of the CSI measurement, thereby improving the data transmission performance.
  • the first indication information indicates that a possible implementation manner of the M codebooks is: the first indication information includes codebook configuration information of each codebook in the M codebooks, that is, the first The indication information includes M codebook configuration information.
  • the first indication information is used to indicate M codebooks, and the first indication information indicates codebook configuration information of the M codebooks, or the first indication information indicates each of the M codebooks.
  • the codebook configuration information is used to indicate at least one of the following information: a codebook type, a codebook parameter, and a codebook subset restriction (CSR).
  • the M codebook configuration information may be carried in a high layer signaling (such as a radio resource control (RRC) message), such as a reporting setting field carried in an RRC message, or the M
  • RRC radio resource control
  • the codebook configuration information may be carried in a media access control (MAC) control element (CE) signaling, or the codebook configuration information may be carried in other signaling, which is used in this embodiment of the present application. Not limited.
  • the codebook type may be a vector selection codebook (type I codebook) or a base vector combination codebook (type II codebook, generally used for high precision measurement feedback);
  • the codebook parameter may include: the number of ports (including the first The number of ports in one dimension (for example, N1) and the number of ports in the second dimension (for example, N2), the number of panels, the number of beams, the subband amplitude, the sample size, the phase size, and the codebook subset limit. At least one.
  • the first indication information may include a codebook type of at least one of the M codebooks.
  • the first indication information may include a codebook parameter of at least one of the M codebooks.
  • the first indication information may include a codebook subset restriction of at least one of the M codebooks.
  • the first indication information is further used to indicate that the channel state information CSI measurement is performed based on the M codebooks.
  • the first indication information may be used to perform CSI measurement based on the M codebooks by means of a display indication or an implicit indication, which is not limited by the embodiment of the present application.
  • the first indication information includes the M codebook configuration information and the second indication information, where the second indication information is used to indicate that the CSI measurement is performed based on the M codebooks.
  • the second indication information may include at least one bit, by which the CSI measurement is performed based on the M codebooks.
  • the second indication information is further used to indicate that CSI measurement is performed based on multiple codebooks in the M codebooks.
  • the M codebook configuration information and the second indication information may be carried in the same signaling; or the M codebook configuration information is carried in the first signaling, where the second indication information is carried in the first In the second signaling, the embodiment of the present application does not limit this.
  • Implicit indication mode the first indication information includes the M codebook configuration information, and the M codebook configuration information indicates that the terminal device performs CSI measurement based on the M codebooks.
  • the first indication information includes the M codebook configuration information and the second indication information; in the case of an implicit indication: the first indication information is the M codebooks Configuration information.
  • the terminal device when the network device configures a plurality of M codebooks to the terminal device at the same time or at a time, the terminal device is instructed to perform CSI measurement based on the M codebooks.
  • the method for measuring channel state information provided by the embodiment of the present application may indicate that the CSI measurement is performed based on the M codebooks by an explicit indication or an implicit manner, and the flexibility of the indication may be improved.
  • the terminal device performs CSI measurement based on the M codebooks according to the first indication information.
  • the CSI measurement is performed by the terminal device based on the M codebooks, the N resources, and the correspondence between the M codebooks and the N resources, where the resources include a channel state information reference signal CSI-RS resource, At least one of a CSI-RS resource set, a CSI-RS resource group, or a CSI-RS port group, where N is an integer greater than one.
  • One codebook can correspond to the first resource
  • the second codebook can correspond to the second resource.
  • N>M can be understood as a plurality of resources corresponding to one codebook.
  • the first codebook can correspond to the first codebook.
  • the second resource, the second codebook may correspond to the third and fourth resources, or the first codebook corresponds to the first resource used for channel measurement and the first resource used for interference measurement
  • the second codebook corresponds to the second resource used for channel measurement and the second resource used for interference measurement, or the first codebook corresponds to the first resource used for channel measurement and the second is used for The resource for channel measurement, the second codebook corresponds to the first resource used for interference measurement and the second resource used for interference measurement.
  • N ⁇ M can be understood as a resource corresponding to multiple codebooks.
  • a CSI-RS resource may include multiple port groups, and a port group and a codebook have a one-to-one correspondence.
  • the CSI-RS resource includes two non-QCL CSI-RS port groups, and the two codebooks received by the UE and the two port groups of one CSI-RS resource are in one-to-one correspondence.
  • N is less than M. It can also be understood that N of the M codebooks correspond to N resources. For example, if the UE receives 2 resources and 3 codebooks, the first codebook corresponds to the first resource, and the second The codebook corresponds to the second resource.
  • the foregoing embodiment only exemplarily provides the correspondence between the N resources and the M codebooks.
  • the embodiment of the present application is not limited thereto, and the N resources and the M codebooks may also have Other corresponding relationships are not limited in this embodiment of the present application.
  • first codebook and the second codebook (and the third codebook%) described in the embodiment of the present application may be determined according to the sequence of the codebook configuration information, or may be configured according to the terminal device.
  • the embodiments of the present application, which are determined by the order of the present invention, or may be determined according to other rules, are not limited thereto.
  • first resource and the second resource (and the third resource%) described in the embodiment of the present application may be determined according to the sequence of the resource configuration information, or may be configured according to the terminal device.
  • the embodiments of the present application, which are determined in the order, or may be determined according to other rules, are not limited thereto.
  • first reporting configuration and the second reporting configuration (and the third reporting configuration, ...) described in the embodiments of the present application may be determined according to the sequence of reporting the configuration information, or may be in accordance with the terminal device.
  • the order of the configuration is determined, or the embodiment of the present application may be determined according to other rules.
  • At least one CSI of the L CSIs is determined based on the M codebooks, N resources, and a correspondence between the M codebooks and the N resources.
  • the N resources may include resources for channel measurement and resources for interference measurement.
  • the terminal device may receive resource configuration information of each of the N resources sent by the network device. That is, the terminal device can receive N resource configuration information sent by the network device, where the N resource configuration information is used to configure N resources.
  • the N resource configuration information may be carried in a high-level signaling, such as a radio resource control (RRC) message, for example, may be carried in a resource setting field.
  • RRC radio resource control
  • the correspondence between the N resources and the M codebooks may be predefined or may be indicated by high layer signaling sent by the network device, for example, the correspondence may be configured in a measurement setting.
  • the configuration may be configured in a resource setting or a reporting setting, which is not limited in this embodiment of the present application.
  • each of the M codebooks corresponds to at least one of the N resources,
  • the at least one resource includes a first resource for channel measurement.
  • the first indication information is used to perform CSI measurement based on the M codebooks, including: the terminal device obtains a diagonal block matrix based on the M codebooks; and the terminal device performs the CSI measurement based on the diagonal block matrix.
  • the terminal device may obtain a diagonal block matrix based on the M codebooks, and perform CSI measurement according to the diagonal block matrix.
  • the terminal device may obtain a diagonal block matrix according to the M codebooks, and estimate M channel matrices according to M resources used for channel measurement in the N resources, and according to Obtaining an equivalent channel matrix according to the M channel matrix and the diagonal block matrix; obtaining the L CSIs according to the equivalent channel matrix and the M codebooks, wherein the M codebooks and the M are used for channels
  • the measured resources have a corresponding relationship.
  • the network device 1 and the network device 2 are cooperatively transmitted.
  • the terminal device estimates the channel matrix H1 according to the CSI-RS transmitted by the network device 1, and estimates the channel matrix H2 according to the CSI-RS transmitted by the network device 2.
  • the network device 1 is configured with a codebook W1
  • the network device 2 is configured with a codebook W2.
  • W1 [v 11 v 12 ... v 1n ]
  • W2 [v 21 v 22 ... v 2m ]
  • vjk represents an optional precoding matrix, 1 ⁇ j ⁇ n, 1 ⁇ k ⁇ m.
  • the first indication information indicates two codebooks, in a CoMP transmission scenario
  • Diagonal block matrix consisting of W1 and W2
  • the terminal device obtains the equivalent channel matrix H3 according to the W1, W2, H1, and H2, and can be obtained by the following formula:
  • the terminal device uses the H3 as a channel matrix of each channel in the CoMP transmission scenario, and determines a precoding matrix used by each channel according to the H3 and a codebook configured for each channel, that is, a first precoding matrix.
  • the first codebook is selected in the first codebook
  • the second precoding matrix is selected in the second codebook. For example, the terminal device determines that the UE determines that When the network device 1 uses the precoding matrix v 12 and the network device 2 uses the precoding matrix v 23 , the system has the largest sum of throughput and better data transmission performance.
  • the terminal device can determine the t-th CSI in the t-th codebook based on the M codebooks and the equivalent channel matrix, where 0 ⁇ t ⁇ M.
  • the measurement method of the CSI provided by the embodiment of the present application, because the equivalent channel matrix is obtained according to the M channel matrix and the diagonal block matrix, and carries the precoding weights included in the M codebooks, to a certain extent
  • the channel condition of the communication system as a whole in the CoMP transmission scenario can be characterized. Therefore, performing CSI measurement according to the equivalent channel matrix and the M codebooks can improve the accuracy of the CSI and the throughput rate of the communication system, thereby improving the data transmission rate. .
  • any one of the first to the fourth possible implementation manners of the first aspect in a fifth possible implementation manner of the first aspect, the method further includes:
  • the terminal device sends K CSIs in the L CSIs to the network device, where K is an integer greater than 0, and K is less than or equal to L.
  • the terminal device may report part or all of the CSI measured by the CSI to the network device.
  • the terminal device sends the K CSIs in the L CSIs to the network device, including:
  • the terminal device sends CSI feedback information to the network device based on a CSI reporting configuration, where the CSI feedback information is used to feed back the K CSIs.
  • the terminal device sends CSI feedback information to the network device by using a reporting configuration, which can reduce signaling overhead.
  • the CSI feedback information includes the K CSIs.
  • the CSI feedback information includes a difference between each CSI of the K CSIs except the first CSI and the first CSI, and the first CSI is determined according to a preset rule. of.
  • the joint feedback may refer to cascaded feedback of K RIs, for example, multiple RIs perform sequential cascade feedback
  • the CSI feedback information may represent [RI 1 , RI 2 , . . . , RI K ], that is, the CSI feedback information.
  • the bit length is the sum of the bit lengths of RI 1 to RI K .
  • the joint feedback may also refer to joint coding feedback of K CSIs, and the bit length of the CSI feedback information may be determined according to a bit length of each RI of the K RIs and a parameter configuration of the codebook.
  • the joint feedback may also refer to differential feedback of K CSIs.
  • RI 1 is a reference RI
  • the CSI feedback information may be expressed as [RI 1 , ⁇ RI 2 , ⁇ RI 3 , . . . , ⁇ RI k ], where ⁇ RI k represents the difference between the Kth RI and the 1st RI, 1 ⁇ k ⁇ K.
  • the terminal device may perform the joint feedback in units of CSI, or The terminal device may perform the foregoing joint feedback in the unit of the type of the CSI parameter, which is not limited in this embodiment of the present application.
  • the application provides a method for measuring channel state information CSI, where the method includes:
  • the network device sends, to the terminal device, first indication information, where the first indication information is used to indicate M codebooks, where M is an integer greater than one;
  • the network device receives K CSIs sent by the terminal device, at least one CSI of the K CSIs is obtained based on the M codebooks, and K is an integer greater than 0.
  • the method further includes:
  • the network device sends resource configuration information to the terminal device, where the resource configuration information is used to indicate N resources, where the resource includes a channel state information reference signal CSI-RS resource, a CSI-RS resource set, a CSI-RS resource group, or a CSI- At least one of the RS port groups, N is an integer greater than 1.
  • each of the M codebooks corresponds to at least one of the N resources
  • the at least one resource includes a first resource for channel measurement.
  • the method further includes:
  • the network device sends a report configuration information to the terminal device, where the report configuration information is used to indicate a CSI report configuration;
  • the network device receives K CSIs sent by the terminal device, including:
  • the network device receives CSI feedback information that is sent by the terminal device according to the CSI report configuration, and the CSI feedback information is used to feed back the K CSIs.
  • the CSI feedback information includes a difference between each CSI of the K CSIs except the first CSI and the first CSI, and the first CSI is determined according to a preset rule. of.
  • the present application provides a measurement apparatus for channel state information CSI for performing the method in any of the above first aspect or any possible implementation of the first aspect.
  • the present application provides a measurement apparatus for channel state information CSI, which is used to perform the method in any of the foregoing second aspect or any possible implementation of the second aspect.
  • the present application provides a measurement apparatus for channel state information CSI, the apparatus comprising: a memory, a processor, a transceiver, and instructions stored on the memory and executable on the processor, wherein the memory
  • the processor and the communication interface communicate with each other through an internal connection path, wherein the processor executes the instructions to cause the apparatus to implement the method of any of the first aspect or the first aspect of the first aspect.
  • the present application provides a measurement apparatus for channel state information CSI, the apparatus comprising: a memory, a processor, a transceiver, and instructions stored on the memory and operable on the processor, wherein the memory
  • the processor and the communication interface communicate with each other through an internal connection path, wherein the processor executes the instruction to cause the apparatus to implement the method of any of the second aspect or the second aspect of the second aspect.
  • the present application provides a computer readable medium for storing a computer program, the computer program comprising instructions for implementing the method of any of the first aspect or the first aspect of the first aspect.
  • the present application provides a computer readable medium for storing a computer program, the computer program comprising instructions for implementing the method of any of the second aspect or the second aspect of the second aspect.
  • the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to implement the method of any of the first aspect or the first aspect of the first aspect.
  • the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to implement the method of any of the above-described second aspect or any of the possible implementations of the second aspect.
  • the present application provides a chip device, including: an input interface, an output interface, at least one processor, and a memory, wherein the input interface, the output interface, the processor, and the memory communicate with each other through an internal connection path.
  • the processor is operative to execute code in the memory, and when the processor executes the code, the chip device implements the method of any of the first aspect or the first aspect of the first aspect.
  • the present application provides a chip device, including: an input interface, an output interface, at least one processor, and a memory, wherein the input interface, the output interface, the processor, and the memory communicate with each other through an internal connection path.
  • the processor is operative to execute code in the memory, and when the processor executes the code, the chip device implements the method of any of the second aspect or the second aspect of the second aspect.
  • FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a method for measuring channel state information provided by an embodiment of the present application
  • FIG. 3 is a schematic block diagram of a device for measuring channel state information provided by an embodiment of the present application.
  • FIG. 4 is a schematic block diagram of another apparatus for measuring channel state information provided by an embodiment of the present application.
  • FIG. 5 is a schematic block diagram of another apparatus for measuring channel state information according to an embodiment of the present application.
  • FIG. 6 is a schematic block diagram of another apparatus for measuring channel state information provided by an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the communication system applicable to the embodiment of the present application is first described in detail by taking the communication system shown in FIG. 1 as an example.
  • FIG. 1 is a schematic diagram of a wireless communication system 100 suitable for use with embodiments of the present application.
  • the wireless communication system 100 can include at least one network device, such as the network device #1 111, the network device #2 112, and the network device #3 113 shown in FIG. 1, and the wireless communication system 100 can also At least one terminal device is included, for example, the terminal device 121 shown in FIG.
  • one or more of the network device #1 111, the network device #2 112, and the network device #3 113 can simultaneously communicate with the terminal device 121.
  • network device #1 111 and network device #2 112 simultaneously communicate with terminal device 121.
  • the network device in the wireless communication system may be any device having a wireless transceiver function or a chip that can be disposed on the device, including but not limited to: an evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), and home base station (for example, Home evolved) NodeB, or Home Node B, HNB), BaseBand Unit (BBU), Access Point (AP), Wireless Relay Node, Wireless Backhaul Node in Wireless Fidelity (WIFI) System , transmission point (TP) or transmission and reception point (TRP), etc., can also be 5G, such as NR, gNB in the system, or transmission point (TRP or TP), 5G system One or a group of base stations (including multiple antenna panels), or a network node that constitutes a gNB or transmission point, such as a baseband unit (BBU), or a distributed unit (dist Rimped unit, DU), etc.
  • eNB
  • the gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include a radio unit (RU).
  • the CU implements some functions of the gNB, and the DU implements some functions of the gNB.
  • the CU implements radio resource control (RRC), the function of the packet data convergence protocol (PDCP) layer, and the DU implements the wireless chain.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • the DU implements the wireless chain.
  • the functions of the radio link control (RLC), the media access control (MAC), and the physical (PHY) layer Since the information of the RRC layer eventually becomes information of the PHY layer or is transformed by the information of the PHY layer, high-level signaling, such as RRC layer signaling or PHCP layer signaling, can also be used in this architecture.
  • the network device can be a CU node, or a DU node, or a device including a CU node and a DU node.
  • the CU may be divided into network devices in the access network RAN, and the CU may be divided into network devices in the core network CN, which is not limited herein.
  • the terminal equipment in the wireless communication system may also be referred to as 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.
  • the terminal device in the embodiment of the present application may be a mobile phone, a tablet, a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal.
  • Equipment wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, transportation security ( A wireless terminal in a transportation safety, a wireless terminal in a smart city, a wireless terminal in a smart home, and the like.
  • the embodiment of the present application does not limit the application scenario.
  • the foregoing terminal device and a chip that can be disposed in the foregoing terminal device are collectively referred to as a terminal device.
  • the network device #1 to the network device #3 and the terminal device are schematically illustrated in FIG. 1 for convenience of understanding, but this should not constitute any limitation to the present application, and the wireless communication system may further include more Or a smaller number of network devices, and may also include a larger number of terminal devices.
  • Network devices that communicate with different terminal devices may be the same network device, or may be different network devices, and networks that communicate with different terminal devices. The number of devices may be the same or different, and this application does not limit this.
  • a network device In a CoMP transmission scenario, a network device usually needs to refer to the CSI fed back by the terminal device to determine a reasonable transmission scheme and scheduling policy.
  • the terminal device may perform CSI measurement and feedback according to a reference signal resource indicated by the network device, for example, a channel state information reference signal (CSI-RS) resource.
  • CSI-RS channel state information reference signal
  • the CSI described in the embodiment of the present application includes, but is not limited to, at least one of the following information: a precoding matrix indicator (PMI), a rank indication (RI), and a channel quality indicator ( The channel quality indicator (CQI), the CSI-RS resource indicator (CRI), and the layer indication (LI) are not limited in this embodiment of the present application.
  • PMI precoding matrix indicator
  • RI rank indication
  • CQI channel quality indicator
  • CQI CSI-RS resource indicator
  • LI layer indication
  • the terminal device estimates the channel matrix H1 according to the CSI-RS transmitted by the network device 1, and the network device 1 configures the codebook W1 according to the CSI-RS estimated channel matrix H2 transmitted by the network device 2.
  • the network device 2 is configured with a codebook W2.
  • W1 [v 11 v 12 ... v 1n ]
  • W2 [v 21 v 22 ... v 2m ]
  • v jk represents an optional precoding matrix, 1 ⁇ j ⁇ n, 1 ⁇ k ⁇ m.
  • the number n 1 of optional precoding matrices in W1 may be determined according to, for example, codebook parameter information of W1 and codebook subset restriction information of W1, where the number n 2 of optional precoding matrices in W2 may be, for example, It is determined according to the codebook parameter information of W2 and the W2 codebook subset restriction information.
  • the terminal device at an equivalent channel H1 ⁇ W1, and W1 is determined in a first pre-coding matrix, e.g. v 11, v 11 the precoding matrix so that a maximum throughput of the network device; the terminal the second device determines the precoding matrix at the equivalent channel H2 ⁇ W2, e.g. v 21, v 21 the precoding matrix so that the maximum throughput of the network device 2.
  • the two precoding matrices of the network device 1 and the network device 2 interfere with each other. Therefore, the sum of the system throughput of the network device 1 and the network device 2 is relatively low, that is, the measurement accuracy of the CSI. Lower, which affects data transfer performance.
  • the present application provides a method for measuring channel state information, which is advantageous for improving the accuracy of CSI measurement, thereby improving data transmission performance.
  • the method of measuring channel state information provided by the present application is applicable to a wireless communication system, such as the wireless communication system 100 shown in FIG.
  • the terminal device in the embodiment of the present application can communicate with one or more network devices at the same time.
  • the network device in the embodiment of the present application may correspond to the network device #1 111, the network device #2112, and the network device in FIG.
  • the terminal device in the embodiment of the present application may correspond to the terminal device 121 in FIG. 1 .
  • the CSI-RS in the embodiments of the present application is a specific form of the reference signal for CSI measurement, and should not constitute any limitation to the present application. In fact, this application does not exclude the use of other reference signals for CSI measurements, such as demodulation reference signals (DMRS), or reference signals having the same or similar functions as defined in future protocols.
  • DMRS demodulation reference signals
  • the embodiment of the present application is described in detail by taking an interaction process between a terminal device and one or more network devices, where the terminal device may be in a wireless communication system and has a wireless connection relationship with the network device.
  • the terminal device may be in a wireless communication system and has a wireless connection relationship with the network device.
  • Any terminal device It can be understood that any one of the terminal devices in the wireless communication system can perform CSI measurement and feedback based on the same technical solution, which is not limited in this application.
  • FIG. 2 is a schematic flowchart of a method 200 for measuring channel state information provided by an embodiment of the present application, which is shown from the perspective of device interaction.
  • the terminal device receives first indication information that is sent by the network device, where the first indication information is used to indicate M codebooks, where M is an integer greater than 1.
  • the network device sends the first indication information to the terminal device.
  • the first indication information is used to indicate M codebooks, and the first indication information is used to indicate multiple codebooks, for example, 2 codebooks or 3 codebooks or multiple codebooks.
  • the terminal device has a communication connection with the network device.
  • the terminal device may be the terminal device 121 shown in FIG. 1, and the network device may have the communication with the terminal device 121 as shown in FIG.
  • One or more connected network devices for example, one or more of network device #1 111, network device #2 112, and network device #3 113.
  • the first indication information indicates that a possible implementation manner of the M codebooks is: the first indication information includes codebook configuration information of each codebook in the M codebooks, that is, the first The indication information includes M codebook configuration information.
  • the codebook configuration information is used to indicate at least one of the following information: a codebook type, a codebook parameter, and a codebook subset restriction (CSR).
  • the M codebook configuration information may be carried in a high-level signaling (such as a radio resource control (RRC) message), such as a reporting setting field carried in an RRC message, for example, a bearer.
  • RRC radio resource control
  • the M codebook configuration information may be carried in a media access control (MAC) control element (CE) signaling, or the code
  • MAC media access control
  • CE control element
  • the reporting configuration field may indicate the two codebooks by: (1) or (2):
  • the codebook type may be a vector selection codebook (type I codebook) or a base vector combination codebook (type II codebook, generally used for high precision measurement feedback);
  • the codebook parameter may include: the number of ports (including the first The number of ports in one dimension (for example, N1) and the number of ports in the second dimension (for example, N2), the number of panels, the number of beams, the subband amplitude, the sample size, the phase size, and the codebook subset limit. At least one.
  • the first indication information is used to indicate M codebooks, and the first indication information indicates codebook configuration information of the M codebooks, or the first indication information indicates each of the M codebooks.
  • the first indication information may include a codebook type of at least one codebook in the M codebooks, such as a codebook type that may include each codebook in the M codebooks.
  • the first indication information may include a codebook parameter of at least one of the M codebooks.
  • a codebook parameter of each codebook in the M codebooks may be included.
  • the first indication information may include a codebook subset restriction of at least one of the M codebooks.
  • a codebook subset limit of each of the M codebooks may be included.
  • the first indication information may include a codebook parameter of each codebook in the M codebooks; or may include a codebook of each codebook except the first codebook in the M codebooks. The difference between the parameter and the codebook parameter of the first codebook and the codebook parameter of the first codebook.
  • the first codebook may be determined according to a rule agreed in advance with the network device, and the first codebook may also be referred to as a reference codebook.
  • the reference codebook may be the codebook of the first configuration, or the codebook of the second configuration, or the codebook of the last configuration; or the reference codebook may be
  • the codebook parameter is a codebook that meets the condition.
  • the condition may be that the number of ports in the first dimension is the largest, or the same codebook type, or the number of the same panel, and the like.
  • the first indication information may include M bit bitmaps, where different bitmaps in the M bitmaps indicate CSRs of different codebooks, and each bit in the bitmap may indicate the codebook corresponding to the bitmap.
  • 1 precoding vector/precoding vector group wherein: 1 precoding vector group may include one or more precoding vectors; or the first indication information includes 1 bitmap, each bit in the bitmap may be simultaneously indicated One precoding vector/precoding vector group for each codebook in the M codebooks.
  • the meaning indicated by one bit in the bitmap of the codebook may be determined according to the codebook type of the codebook, the number of ports, and the like.
  • the meaning indicated by 1 bit in the bitmap is a precoding vector.
  • the meaning indicated by 1 bit in the bitmap is a pre- Coding vector set.
  • the port parameter configuration and oversampling parameter configuration N1*N2*O1*O2 ⁇ 16 the meaning indicated by one bit in the bitmap is a precoding vector
  • the port parameter configuration and the oversampling parameter configuration N1*N2* When O1*O2 ⁇ 16, the meaning indicated by the 1-bit bit in the bitmap is a precoding vector group.
  • the number of precoding vector groups or the number of precoding vectors included in one precoding vector group may be predefined or determined by signaling configuration or the terminal device according to its own capabilities; for example, a predefined group of 1
  • the precoding vector includes two or four precoding vectors; or may determine the number of precoding vectors included in one precoding vector group according to a signaling configuration, such as a beam number configuration and an oversampling parameter configuration; or According to the capability of the UE, whether the multi-panel is supported, whether the multi-beam transmission is supported, the base station configuration, or the number of the pre-coding vectors in the pre-coding vector group is determined according to a predefined method such as a look-up table. This is not limited.
  • the first indication information may further indicate that CSI measurement is performed based on the M codebooks.
  • the terminal device includes more than one codebook configuration information according to the received report configuration, and performs CSI measurement based on the configured multiple codebook configuration information.
  • the first indication information may be used to perform CSI measurement based on the M codebooks by means of a display indication or an implicit indication, which is not limited by the embodiment of the present application.
  • Display indication mode the first indication information, the M codebook configuration information and the second indication information, the second indication information is used to indicate that the CSI measurement is performed based on the M codebooks.
  • the second indication information may include at least one bit, by which the CSI measurement is performed based on the M codebooks.
  • the second indication information is further used to indicate that CSI measurement is performed based on multiple codebooks in the M codebooks.
  • the second indication information indicates that the CSI measurement is performed based on the M codebooks by using one bit, and the value of the bit is set to 1 to perform CSI measurement based on the M codebooks, and the 0 indication is not based on the M codebooks. Perform CSI measurements.
  • the second indication information indicates, by using at least one bit, which CSI measurement is performed based on the codebooks of the M codebooks.
  • the second indication information may be a bitmap, and the bit length of the bitmap is according to It is determined by configuring the number of codebooks.
  • the second indication information is "110" indicating that CSI measurement is performed based on the first and second codebooks.
  • the M codebook configuration information and the second indication information may be carried in the same signaling; or the M codebook configuration information is carried in the first signaling, where the second indication information is carried in the first In the second signaling, the embodiment of the present application does not limit this.
  • Implicit indication mode the first indication information includes the M codebook configuration information, and the M codebook configuration information indicates that the terminal device performs CSI measurement based on the M codebooks.
  • the first indication information in the case of displaying an indication: the first indication information includes the M codebook configuration information and the second indication information; in the case of an implicit indication: the first indication information is the M codebook configuration information.
  • the terminal device when the network device configures a plurality of M codebooks to the terminal device at the same time or at a time, the terminal device is instructed to perform CSI measurement based on the M codebooks.
  • S220 The terminal device performs CSI measurement based on the M codebooks according to the first indication information, to obtain L CSIs, where at least one CSI of the L CSIs is obtained based on the M codebooks, where L is greater than 0. The integer.
  • the terminal device may determine the M codebooks based on the first indication information, and perform CSI measurement based on the M codebooks.
  • a CSI described in the embodiments of the present application may be understood as at least one of the following relationships: one channel, one codebook, one or one set of resources for channel measurement, one connection point, one base station, one A corresponding CSI such as a measurement setting.
  • the CSI described in the embodiment of the present application includes, but is not limited to, at least one of the following information: at least one of CRI, LI, RI, PMI, and CQI, which is not limited by the embodiment of the present application.
  • RI, PMI, etc. can be understood as different types of parameters in a CSI.
  • the terminal device may perform the CSI measurement according to the M codebooks, the N resources, and the correspondence between the M codebooks and the N resources, where the resources include a channel state information reference signal CSI-RS. And at least one of a CSI-RS resource set, a CSI-RS resource group, or a CSI-RS port group, where N is an integer greater than 1.
  • N may be greater than or equal to M.
  • One codebook can correspond to the first resource
  • the second codebook can correspond to the second resource.
  • N>M can be understood as a plurality of resources corresponding to one codebook.
  • the first codebook can correspond to the first codebook.
  • the second resource, the second codebook may correspond to the third and fourth resources, or the first codebook corresponds to the first resource used for channel measurement and the first resource used for interference measurement
  • the second codebook corresponds to the second resource used for channel measurement and the second resource used for interference measurement, or the first codebook corresponds to the first resource used for channel measurement and the second is used for The resource for channel measurement, the second codebook corresponds to the first resource used for interference measurement and the second resource used for interference measurement.
  • N ⁇ M can be understood as a resource corresponding to multiple codebooks.
  • a CSI-RS resource may include multiple port groups, and a port group and a codebook have a one-to-one correspondence.
  • the CSI-RS resource includes two non-QCL CSI-RS port groups, and the two codebooks received by the UE and the two port groups of one CSI-RS resource are in one-to-one correspondence.
  • N is less than M. It can also be understood that N of the M codebooks correspond to N resources. For example, if the UE receives 2 resources and 3 codebooks, the first codebook corresponds to the first resource, and the second The codebook corresponds to the second resource.
  • the foregoing embodiment only exemplarily provides the correspondence between the N resources and the M codebooks.
  • the embodiment of the present application is not limited thereto, and the N resources and the M codebooks may also have Other corresponding relationships are not limited in this embodiment of the present application.
  • first codebook and the second codebook (and the third codebook%) described in the embodiment of the present application may be determined according to the sequence of the codebook configuration information, or may be configured according to the terminal device.
  • the embodiments of the present application, which are determined by the order of the present invention, or may be determined according to other rules, are not limited thereto.
  • first resource and the second resource (and the third resource%) described in the embodiment of the present application may be determined according to the sequence of the resource configuration information, or may be configured according to the terminal device.
  • the embodiments of the present application, which are determined in the order, or may be determined according to other rules, are not limited thereto.
  • first reporting configuration and the second reporting configuration (and the third reporting configuration, ...) described in the embodiments of the present application may be determined according to the sequence of reporting the configuration information, or may be in accordance with the terminal device.
  • the order of the configuration is determined, or the embodiment of the present application may be determined according to other rules.
  • At least one CSI of the L CSIs is determined based on the M codebooks, N resources, and a correspondence between the M codebooks and the N resources.
  • the N resources may include resources for channel measurement and resources for interference measurement.
  • the terminal device may receive resource configuration information of each of the N resources sent by the network device. That is, the terminal device can receive N resource configuration information sent by the network device, where the N resource configuration information is used to configure N resources.
  • the N resource configuration information may be carried in a high-level signaling, such as a radio resource control (RRC) message, for example, may be carried in a resource setting field.
  • RRC radio resource control
  • the correspondence between the N resources and the M codebooks may be predefined or may be indicated by high layer signaling sent by the network device, for example, the correspondence may be configured in a measurement setting.
  • the configuration may be configured in a resource setting or a reporting setting, which is not limited in this embodiment of the present application.
  • the resource information and the codebook information are configured.
  • the channel measurement resource 1 and the codebook information 1, the channel measurement resource 2, and the codebook information 2 are configured in the resource setting, and the channel measurement resource 1 and the codebook information are represented. 1 is corresponding, and channel measurement resource 2 and codebook information 2 are corresponding.
  • the codebook information may be an ID of a reporting setting, or a reporting setting ID and a codebook index, or a codebook ID, or a measurement setting ID, or a configuration information of the codebook (including a codebook type, Codebook parameter information, etc.).
  • the network device and the terminal device may pre-determine a correspondence between the M codebooks and the N resources in sequence according to a configuration order.
  • resources for channel measurement and resources for interference measurement for the same channel may correspond to the same codebook.
  • each codebook of the M codebooks corresponds to at least one of the N resources, and the at least one resource includes resources for channel measurement. That is, each codebook in the M codebooks corresponds to at least one resource used for channel measurement, that is, the N resources include at least M resources for channel measurement, and the M codebooks and the M resource correspondences for channel measurement.
  • the M codebooks may be in one-to-one correspondence with the M resources for channel measurement.
  • the UE receives 2 CSI-RS resources for channel measurement, and the UE receives 2 codebook configuration information.
  • the UE determines the precoding vector in the first codebook according to the first CSI-RS resource used for channel measurement and the two codebook configuration information, thereby obtaining the first CSI.
  • the UE determines a precoding vector in the second codebook according to the second CSI-RS resource used for channel measurement and two codebook configuration information, thereby obtaining a second CSI.
  • the first codebook corresponds to the first CSI-RS resource used for channel measurement
  • the second codebook corresponds to the second CSI-RS resource used for channel measurement.
  • the UE receives two resources for channel measurement, such as CSI-RS resources, and two resources for interference measurement, such as CSI-RS resources.
  • two resources for channel measurement such as CSI-RS resources
  • two resources for interference measurement such as CSI-RS resources.
  • the UE receives two codebook configuration indication information
  • the UE according to the first CSI-RS resources for channel measurement and the first CSI-RS resource for interference measurement and 2 codebook configuration indication information, get the first CSI; according to the second CSI-RS for channel measurement
  • the resource and the second CSI-RS resource used for interference measurement and two codebook configuration indication information obtain a second CSI.
  • the first codebook corresponds to the first CSI-RS resource used for channel measurement.
  • the second codebook corresponds to the second CSI-RS used for channel measurement.
  • the UE receives two resources for channel measurement, such as CSI-RS resources, and two resources for interference measurement, such as CSI-RS resources.
  • two resources for channel measurement such as CSI-RS resources
  • two resources for interference measurement such as CSI-RS resources.
  • the UE receives two codebook configuration indication information
  • the UE according to the first CSI-RS resources for channel measurement and the first CSI-RS resource for interference measurement and 2 codebook configuration indication information, get the first CSI; according to the second CSI-RS for channel measurement
  • the resource and the second CSI-RS resource used for interference measurement and two codebook configuration indication information obtain a second CSI.
  • the first codebook corresponds to the first CSI-RS resource used for channel measurement
  • the second codebook corresponds to the first CSI-RS used for interference measurement
  • the first codebook and the second codebook Corresponding to the CSI-RS resources used for channel measurement
  • the second codebook corresponds to the second CSI-RS used for interference measurement.
  • the UE receives 2 resources and 2 codebooks.
  • One of the two resources is used to measure the channel and one is used to measure interference.
  • the first codebook corresponds to the resource used to measure the channel, or the first codebook corresponds to the first resource.
  • the second codebook corresponds to the resource used for the interference measurement, and the second codebook corresponds to the second resource.
  • the terminal device performs CSI measurement based on the M codebooks, and can also be understood that the terminal device performs channel measurement based on M resources used for channel measurement, and can also be understood as the terminal device based on M configured resources.
  • the CSI measurement is performed, and the M configured resources include at least one of resources for channel measurement and resources for interference measurement.
  • codebook 1 corresponds to resource group 1, which includes CSI-RS resource group 1 for channel measurement and CSI-RS resource group 1 for interference measurement
  • codebook 2 corresponds to CSI-RS resource Group 2
  • the CSI-RS resource group 2 includes a CSI-RS resource group 2 for channel measurement and a CSI-RS resource group 2 for interference measurement.
  • codebook 1 corresponds to CSI-RS resource group 1 in a CSI-RS resource set for channel measurement
  • codebook 2 corresponds to CSI-RS resource group 2 in a CSI-RS resource set for channel measurement.
  • codebook 1 corresponds to CSI-RS port group 1 in CSI-RS resources for channel measurement
  • codebook 2 corresponds to CSI-RS port group 2 in CSI-RS resources for channel measurement.
  • the terminal device may obtain a diagonal block matrix based on the M codebooks, and perform CSI measurement according to the diagonal block matrix.
  • the terminal device may obtain a diagonal block matrix according to the M codebooks, and estimate M channel matrices according to M resources used for channel measurement in the N resources, and according to Obtaining an equivalent channel matrix according to the M channel matrix and the diagonal block matrix; obtaining the L CSIs according to the equivalent channel matrix and the M codebooks, wherein the M codebooks and the M are used for channels
  • the measured resources have a corresponding relationship.
  • the terminal device estimates the channel matrix H1 according to the CSI-RS transmitted by the network device 1, and the network device 1 is configured according to the CSI-RS estimated channel matrix H2 transmitted by the network device 2.
  • the codebook W1 the network device 2 is configured with a codebook W2.
  • W1 [v 11 v 12 ... v 1n ]
  • W2 [v 21 v 22 ... v 2m ]
  • vjk represents an optional precoding matrix, 1 ⁇ j ⁇ n, 1 ⁇ k ⁇ m.
  • the first indication information indicates two codebooks, in a CoMP transmission scenario
  • Diagonal block matrix consisting of W1 and W2
  • the terminal device obtains the equivalent channel matrix H3 according to the W1, W2, H1, and H2, and can be obtained by the following formula (1):
  • the terminal device uses the H3 as a channel matrix of each channel in the CoMP transmission scenario, and determines a precoding matrix used by each channel according to the H3 and a codebook configured for each channel, that is, a first precoding matrix.
  • the first codebook is selected in the first codebook
  • the second precoding matrix is selected in the second codebook. For example, the terminal device determines that the UE determines that When the network device 1 uses the precoding matrix v 12 and the network device 2 uses the precoding matrix v 23 , the system has the largest sum of throughput and better data transmission performance.
  • the terminal device can determine the t-th CSI in the t-th codebook based on the M codebooks and the equivalent channel matrix, where 0 ⁇ t ⁇ M.
  • the measurement method of the CSI provided by the embodiment of the present application, because the equivalent channel matrix is obtained according to the M channel matrix and the diagonal block matrix, and carries the precoding weights included in the M codebooks, to a certain extent
  • the channel condition of the communication system as a whole in the CoMP transmission scenario can be characterized. Therefore, performing CSI measurement according to the equivalent channel matrix and the M codebooks can improve the accuracy of the CSI and the throughput rate of the communication system, thereby improving the data transmission rate. .
  • the method 200 further includes: the terminal device sends, to the network device, K CSIs in the L CSIs, where K is an integer greater than 0; correspondingly, the network device receives the K devices sent by the terminal device CSI.
  • the terminal device may report the measured part or all of the CSI to the network device, which is not limited in this embodiment of the present application.
  • the terminal device may receive the indication information of each reporting configuration in the at least one reporting configuration sent by the network device. It can also be said that the terminal device can receive at least one reporting configuration information sent by the network device, and the at least one reporting configuration information is used to indicate at least one reporting configuration.
  • the at least one reporting configuration information may be carried in a high-level signaling, such as a radio resource control (RRC) message, for example, may be carried in a reporting setting field, or the reporting configuration information may be It is not limited in this embodiment.
  • RRC radio resource control
  • the terminal device sends CSI feedback information to the network device according to a CSI report configuration, where the CSI feedback information is used to feed back the multiple CSIs; or the terminal device may separately send the CSI to the network device based on multiple reporting configurations.
  • the multiple feedback information is sent, and the multiple feedback information is corresponding to the multiple CSIs.
  • the multiple feedback information may be in one-to-one correspondence with the multiple CSIs, that is, each CSI is reported according to the reporting configuration corresponding to the CSI.
  • the UE receives two reporting settings, where each reporting setting includes one codebook configuration information.
  • the UE performs CSI measurement based on the two codebooks according to the characteristics of the configuration information or the signaling indication.
  • the configuration information may be that the trigger information received by the UE triggers at least two reporting configurations.
  • the bit length of the CSI feedback information may be determined according to at least one of a bit length of a CSI in the one or more CSIs, an optional value range of the CSI, and a value of a differential CSI. This embodiment of the present application does not limit this.
  • the CSI feedback information may be joint feedback of the multiple CSIs.
  • the bit length of the CSI feedback information is determined according to the bit length of the plurality of CSIs.
  • K is an integer greater than 1.
  • the joint feedback may refer to cascaded feedback of K RIs, for example, multiple RIs perform sequential cascade feedback
  • the CSI feedback information may represent [RI 1 , RI 2 , . . . , RI K ], that is, the CSI feedback information.
  • the bit length is the sum of the bit lengths of RI 1 to RI K .
  • the joint feedback may also refer to joint coding feedback of K CSIs, and the bit length of the CSI feedback information may be determined according to a bit length of each RI of the K RIs and a parameter configuration of the codebook.
  • the joint feedback may also refer to differential feedback of K CSIs.
  • RI 1 is a reference RI
  • the CSI feedback information may be expressed as [RI 1 , ⁇ RI 2 , ⁇ RI 3 , . . . , ⁇ RI k ], where ⁇ RI k represents the difference between the Kth RI and the 1st RI, 1 ⁇ k ⁇ K.
  • the terminal device may perform the joint feedback in units of CSI, or The terminal device may perform the foregoing joint feedback in the unit of the type of the CSI parameter, which is not limited in this embodiment of the present application.
  • the first indication information indicates a CSR of each codebook in the M codebooks, and how the first indication information indicates the CSR of each codebook in the M codebooks is described in detail below. .
  • the first indication information may include M bitmaps, where each bitmap is used to indicate a CSR of a codebook, where a bit included in a bitmap of each codebook is The precoding matrix/precoding matrix set of each codebook has a corresponding relationship, and the element 0 in the bitmap indicates that the corresponding precoding matrix/precoding matrix set does not occupy the PMI feedback bit, and the element 1 represents the corresponding precoding matrix/pre The set of coding matrices occupies PMI feedback bits.
  • the codebook W1 of the codebook 1 is [v 11 , v 12 , ... v 15 ], and the bitmap of the codebook 1 may be 01101, indicating that the CSR of the codebook 1 is v 12 , v 13 , v 15 .
  • the codebook configuration information needs at least P ⁇ M bits to indicate the CSR of each codebook in the M codebooks, and P is an integer greater than 1.
  • the first indication information may include M bitmaps, and different bitmaps correspond to CSRs of different codebooks; or the first indication information may include 1 bitmap, where the bitmap includes M parts of bits, The bits of each of the M parts of the bits correspond to the CSRs of different codebooks, which are not limited in this embodiment of the present application.
  • the codebook types of the M codebooks may be the same or different, which is not limited by the embodiment of the present application.
  • the bitmap includes M partial bits
  • the bits of each part may have at least one of the following relationships:
  • the bitmap includes 2 partial bits, the first partial bits are used to indicate the CSR of the first codebook, and the second partial bits are used to indicate the CSR of the second codebook.
  • the number of 1s in the bits of the first part is equal to the number of 1's in the bits of the second part; the number of 0s in the bits of the first part is equal to the number of 0s in the bits of the second part.
  • the value of the q may be pre-defined, or configured by the network device by using the high-layer signaling, or is fed back by the terminal device, which is not limited by the embodiment of the present application.
  • the value of r may be pre-defined (for example, the value of r may be N 1 N 2 ), or configured by the network device by using high-layer signaling, or fed back by the terminal device, and the embodiment of the present application is This is not limited.
  • the value of q may be predefined, or configured by the network device through high layer signaling, or fed back by the terminal device.
  • the embodiment of the present application further provides how to reduce the data amount of the first indication information, for example, how to reduce the number of bits of the first indication information, that is, the M codebooks are indicated by Q bits.
  • the first indication information may include Q bits, and the Q bits simultaneously indicate a CSR of each of the M codebooks.
  • the precoding matrix in the codebook contains the following structure:
  • the first indication information may include N 1 ⁇ O 1 ⁇ N 2 ⁇ O 2 bits, where the N 2 ⁇ O 2 ⁇ l+m bits correspond to all precoding matrices including v l,m in the codebook. set.
  • N 1 represents the number of antenna ports in the first dimension
  • N 2 represents the number of antenna ports in the second dimension
  • O 1 represents an oversampling factor of the first dimension
  • O 2 represents an oversampling factor of the second dimension.
  • the N 1 value and the N 2 value of the different codebooks may be predefined as the same.
  • the N 1 ⁇ O 1 ⁇ N 2 ⁇ O 2 precoding matrices in the codebook are divided into X precoding matrix sets, each precoding
  • the matrix set contains N 1 ⁇ O 2 ⁇ N 2 ⁇ O 2 /X beams.
  • the number of bits of the first indication information may be determined according to information of the precoding matrix set.
  • each two precoding matrices a set that is, set 1 of codebook 2 includes v 21 and v 22 , set 2 includes v 23 and v 24 , set 3 includes v 25 and v 26 , and set 4 includes v 27 and v 28 , the first indication information
  • the data may include 4 bits, and the CSR of the codebook 1 and the CSR of the codebook 2 are simultaneously indicated by the 4 bits. If the 4 bits are 1101, the CSR of the codebook 1 and the CSR of the codebook 2 are both For collection 1, collection 2, and collection 4.
  • a precoding vector of adjacent angles may be included in the precoding matrix set, or an orthogonal precoding vector.
  • the spacing of the precoding vectors included in the same precoding matrix set is adjustable.
  • a precoding matrix of a set of coding matrices eg, may be a set of all precoding matrices. Different ones of the X bits indicate different precoding matrices in different sets of precoding matrices.
  • the precoding matrix in the codebook 1 is divided into X sets, and the first indication information includes X bits, and the X bits are in one-to-one correspondence with the X sets, and the first indication information further includes The Y bits are used to indicate the relationship between the precoding matrix set in the codebook 2 and the precoding matrix set of the first codebook.
  • each two precoding matrices is a set, that is,
  • the set 1 of the codebook 2 includes v 21 and v 22
  • the set 2 includes v 23 and v 24
  • the set 3 includes v 25 and v 26
  • the set 4 includes v 27 and v 28
  • the first indication information may further include
  • the other 4 bits indicate the relationship between the codebook 2 and the codebook 1 by the 4 bits. For example, 1 indicates that the codebook 2 is the same as the codebook 1, and 0 indicates that the codebook 2 is different from the codebook 1, if the 4 bits are If it is 0010, it means that the CSR of the codebook 2 is set 3.
  • the first indication information includes at least one bit for indicating a precoding matrix set corresponding to the type II codebook, and at least one bit is used to indicate a precoding matrix set corresponding to the type I codebook.
  • multiple network devices may send an aperiodic CSI request to the terminal device at the same time.
  • the time-frequency resource conflict may be caused.
  • the terminal device may perform CSI feedback according to at least one of the following manners:
  • aperiodic type I CSI conflicts with another aperiodic type I CSI
  • the aperiodic type I CSI corresponding to the smaller reporting configuration ID (ReportConfigID) has a higher priority and is reported by the terminal device.
  • the network device other aperiodic type I CSIs having a larger reporting configuration ID, has a lower priority and is not reported to the network device by the terminal device.
  • the aperiodic type II CSI corresponding to the smaller reporting configuration ID (ReportConfigID) has a higher priority and is reported by the terminal device.
  • the network device other aperiodic type II CSIs having a larger reporting configuration ID, has a lower priority and is not reported by the terminal device to the network device.
  • aperiodic type I CSI of a physical uplink control channel conflicts with an aperiodic type I CSI of another physical uplink shared channel (PUSCH)
  • the aperiodic type I CSI of the PUSCH has a higher priority and is reported to the network device by the terminal device.
  • the aperiodic type I CSI of the PUCCH has a lower priority and is not reported to the network device by the terminal device. .
  • the aperiodic type II CSI of one PUCCH conflicts with the aperiodic type II CSI of another PUSCH, the aperiodic type II CSI of the PUSCH has a higher priority and is reported to the network device by the terminal device.
  • the aperiodic type II CSI of the PUCCH has a lower priority and is not reported to the network device by the terminal device.
  • the aperiodic type I CSI and the aperiodic type II CSI collide, the aperiodic type I CSI has a higher priority and is reported to the network device by the terminal device, and the aperiodic type II CSI has a lower The priority is not reported to the network device by the terminal device, wherein the second part (part 2) in the aperiodic type II has a lower priority than the first part (part 1).
  • the method for measuring channel state information provided by the embodiment of the present application is described in detail with reference to FIG. 1 to FIG. 2 .
  • the device for measuring channel state information provided by the embodiment of the present application will be described below with reference to FIG. 3 to FIG.
  • FIG. 3 is a schematic block diagram of a measurement apparatus 300 for channel state information provided by an embodiment of the present application.
  • the device 300 includes:
  • the receiving unit 310 is configured to receive first indication information that is sent by the network device, where the first indication information is used to indicate M codebooks, where M is an integer greater than one;
  • the processing unit 320 is configured to perform CSI measurement based on the M codebooks according to the first indication information received by the receiving unit 310, to obtain L CSIs, where at least one CSI of the L CSIs is based on Obtained by M codebooks, L is an integer greater than zero.
  • the first indication information is further used to indicate that channel state information CSI measurement is performed based on the M codebooks.
  • the processing unit is specifically configured to: perform the CSI measurement according to the M codebooks, N resources, and a correspondence between the M codebooks and the N resources, where the resources are And including at least one of a channel state information reference signal CSI-RS resource, a CSI-RS resource set, a CSI-RS resource group, or a CSI-RS port group, where N is an integer greater than 1.
  • each codebook in the M codebooks corresponds to at least one of the N resources, and the at least one resource includes a first resource, where the first resource is used for channel measurement.
  • the processing unit is specifically configured to obtain a diagonal block matrix based on the M codebooks; and perform the CSI measurement based on the diagonal block matrix.
  • the apparatus further includes: a sending unit, configured to send, to the network device, K CSIs in the L CSIs, where K is an integer greater than 0, and K is less than or equal to L.
  • a sending unit configured to send, to the network device, K CSIs in the L CSIs, where K is an integer greater than 0, and K is less than or equal to L.
  • the sending unit is specifically configured to: send CSI feedback information to the network device according to a CSI reporting configuration, where the CSI feedback information is used to feed back the K CSIs.
  • the CSI feedback information includes the K CSIs; or when the K is greater than 1, the CSI feedback information includes each CSI and the first one of the K CSIs except the first CSI. a difference between a CSI and the first CSI, the first CSI being determined according to a preset rule.
  • the apparatus 300 herein is embodied in the form of a functional unit.
  • the term "unit” as used herein may refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (eg, a shared processor, a proprietary processor, or a group) for executing one or more software or firmware programs. Processors, etc.) and memory, merge logic, and/or other suitable components that support the described functionality.
  • ASIC application specific integrated circuit
  • processor eg, a shared processor, a proprietary processor, or a group
  • memory merge logic, and/or other suitable components that support the described functionality.
  • the device 300 may be specifically the terminal device in the foregoing method 200, and the device 600 may be used to execute various processes corresponding to the terminal device in the foregoing method 200 and/ Or steps, to avoid repetition, will not be repeated here.
  • FIG. 4 is a schematic block diagram of a measurement apparatus 400 for channel state information provided by an embodiment of the present application.
  • the device 400 includes:
  • the sending unit 410 is configured to send, to the terminal device, first indication information, where the first indication information is used to indicate M codebooks, where M is an integer greater than one;
  • the receiving unit 420 is configured to receive K CSIs sent by the terminal device, where at least one CSI of the K CSIs is obtained based on the M codebooks sent by the sending unit 410, where K is greater than 0. Integer.
  • the sending unit is further configured to send, to the terminal device, resource configuration information, where the resource configuration information is used to indicate N resources, where the resource includes a channel state information reference signal CSI-RS resource, CSI-RS At least one of a resource set, a CSI-RS resource group, or a CSI-RS port group, where N is an integer greater than one.
  • resource configuration information is used to indicate N resources, where the resource includes a channel state information reference signal CSI-RS resource, CSI-RS At least one of a resource set, a CSI-RS resource group, or a CSI-RS port group, where N is an integer greater than one.
  • each codebook in the M codebooks corresponds to at least one of the N resources, and the at least one resource includes a first resource, where the first resource is used for channel measurement.
  • the sending unit is further configured to send the report configuration information to the terminal device, where the report configuration information is used to indicate a CSI report configuration, and the receiving unit is specifically configured to receive the terminal device based on the CSI.
  • the CSI feedback information sent by the configuration is reported, and the CSI feedback information is used to feed back the K CSIs.
  • the CSI feedback information includes the one or more CSIs; or when the K is greater than 1, the CSI feedback information includes each CSI and the other one of the K CSIs except the first CSI. Determining a difference between the first CSI and the first CSI, where the first CSI is determined according to a preset rule.
  • the apparatus 400 herein is embodied in the form of a functional unit.
  • the term "unit" as used herein may refer to an ASIC, an electronic circuit, a processor (eg, a shared processor, a proprietary processor or a group processor, etc.) and memory, a merge logic, and a processor for executing one or more software or firmware programs. / or other suitable components that support the described functionality.
  • the device 400 may be specifically the network device in the foregoing method 200, and the device 400 may be used to perform various processes corresponding to the network device in the foregoing method 200 and/ Or steps, to avoid repetition, will not be repeated here.
  • FIG. 5 shows a device for measuring channel state information provided by an embodiment of the present application.
  • the device 500 may be the terminal device described in FIG. 1 and FIG. 2, and the device 500 may adopt a hardware architecture as shown in FIG. 5.
  • the apparatus can include a processor 510, a transceiver 520, and a memory 530 that communicate with one another via internal connection paths.
  • the related functions implemented by the processing unit 320 in FIG. 3 may be implemented by the processor 510, and the related functions implemented by the receiving unit 310 may be implemented by the processor 510 controlling the transceiver 520.
  • the processor 510 may include one or more processors, for example, including one or more central processing units (CPUs).
  • processors for example, including one or more central processing units (CPUs).
  • CPUs central processing units
  • the CPU may be a single core CPU, and It can be a multi-core CPU.
  • the transceiver 520 is configured to transmit and receive data and/or information, as well as to receive data and/or information.
  • the transceiver can include a transmitter and a receiver for transmitting data and/or signals, and a receiver for receiving data and/or signals.
  • the memory 530 includes, but is not limited to, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read only memory (EPROM), and a read only memory.
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable read only memory
  • CD-ROM compact disc read-only memory
  • the memory 530 is used to store the program code and data of the device, and may be a separate device or integrated in the processor 510.
  • the processor 510 is configured to control a transceiver to perform information/data transmission with a network device.
  • a transceiver to perform information/data transmission with a network device.
  • Figure 5 only shows a simplified design of the device.
  • the device may also include other necessary components, including but not limited to any number of transceivers, processors, controllers, memories, etc., and all devices that can implement the present application are within the scope of the present application.
  • device 500 can be replaced with a chip device, such as a communication chip that can be used in the device for implementing the relevant functions of processor 510 in the device.
  • the chip device can be a field programmable gate array for implementing related functions, a dedicated integrated chip, a system chip, a central processing unit, a network processor, a digital signal processing circuit, a microcontroller, or a programmable controller or other integrated chip.
  • the chip may include one or more memories for storing program code that, when executed, causes the processor to perform the corresponding functions.
  • FIG. 6 shows a measurement device 600 for channel state information provided by an embodiment of the present application.
  • the device 600 may be the network device described in FIG. 1 and FIG. 2, and the device 600 may adopt a hardware architecture as shown in FIG. 6.
  • the apparatus can include a processor 610, a transceiver 620, and a memory 630 that communicate with one another via internal connection paths.
  • the related functions implemented by the transmitting unit 410 and the receiving unit 420 in FIG. 4 can be implemented by the processor 610 controlling the transceiver 620.
  • the processor 610 may include one or more processors, for example, including one or more CPUs.
  • the processor may be a single core CPU or a multi-core CPU.
  • the transceiver 620 is configured to transmit and receive data and/or information, as well as to receive data and/or information.
  • the transceiver can include a transmitter and a receiver for transmitting data and/or information, and a receiver for receiving data and/or information.
  • the memory 630 includes, but is not limited to, a RAM, a ROM, an EPROM, a CD-ROM, and the memory 630 is used to store related instructions and data.
  • the memory 630 is used to store the program code and data of the device, and may be a separate device or integrated in the processor 610.
  • the processor 610 is configured to control the transceiver to perform information transmission with the terminal device.
  • the processor 610 is configured to control the transceiver to perform information transmission with the terminal device.
  • Figure 6 only shows a simplified design of the device.
  • the device may also include other necessary components, including but not limited to any number of transceivers, processors, controllers, memories, etc., and all devices that can implement the present application are within the scope of the present application.
  • device 600 can be replaced with a chip device, such as a communication chip that can be used in the device for implementing the relevant functions of processor 610 in the device.
  • the chip device can be a field programmable gate array for implementing related functions, a dedicated integrated chip, a system chip, a central processing unit, a network processor, a digital signal processing circuit, a microcontroller, or a programmable controller or other integrated chip.
  • the chip may include one or more memories for storing program code that, when executed, causes the processor to perform the corresponding functions.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

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  • Signal Processing (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil de mesure d'informations d'état de canal, le procédé comprenant les étapes suivantes : un dispositif terminal reçoit des premières informations d'indication envoyées par un dispositif réseau, les premières informations d'indication étant utilisées pour indiquer M livres de codes, M étant un nombre entier supérieur à 1 ; et, sur la base des premières informations d'indication, le dispositif terminal met en œuvre une mesure de CSI sur la base des M livres de codes pour obtenir L CSI, au moins une CSI dans L CSI étant obtenue sur la base des M livres de codes, L étant un nombre entier supérieur à 0. L'utilisation du procédé et de l'appareil de mesure d'informations d'état de canal selon la présente invention facilite l'amélioration de la précision de la mesure de CSI, et améliore ainsi les performances de transmission de données.
PCT/CN2019/071216 2018-01-12 2019-01-10 Procédé et appareil de mesure d'informations d'état de canal WO2019137445A1 (fr)

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