WO2023071627A1 - 一种信道质量的检测方法和基站 - Google Patents

一种信道质量的检测方法和基站 Download PDF

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Publication number
WO2023071627A1
WO2023071627A1 PCT/CN2022/120096 CN2022120096W WO2023071627A1 WO 2023071627 A1 WO2023071627 A1 WO 2023071627A1 CN 2022120096 W CN2022120096 W CN 2022120096W WO 2023071627 A1 WO2023071627 A1 WO 2023071627A1
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WIPO (PCT)
Prior art keywords
pmi
base station
reference signal
terminal
cqi
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PCT/CN2022/120096
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English (en)
French (fr)
Inventor
黄欢欢
徐明涛
胥恒
张钰洲
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华为技术有限公司
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Publication of WO2023071627A1 publication Critical patent/WO2023071627A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057Physical resource allocation for CQI
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/08Testing, supervising or monitoring using real traffic

Definitions

  • the present application relates to the technical field of communications, and in particular to a method for detecting channel quality and a base station.
  • MIMO Multiple input multiple output
  • channel quality indicator CQI
  • TDD time division duplexing
  • SRS sounding reference signal
  • the uplink and downlink channels do not have reciprocity, and the base station cannot estimate the relationship between the CQI of each downlink stream according to the SRS sent by the terminal. Therefore, the FDD system needs a new method to obtain the CQI information of each stream in order to perform reasonable power allocation.
  • FDD frequency division duplexing
  • Embodiments of the present application provide a channel quality detection method and a base station, which are used to measure the channel quality of each data stream.
  • the base station configures a first feedback mode, the first feedback mode instructs the terminal to feed back CQI and RI, and the value of RI is limited to 1, and then the preset first weighting matrix is multiplied by With the i-th column of the W PMI as the first column of the second weighting matrix, the values of the other columns of the second weighting matrix are arbitrary values, the dimensions of the first weighting matrix and the second weighting matrix The dimension of is the number of transmitting antennas ⁇ the number of antenna ports. Then, the base station can use the second weighting matrix to weight the reference signal to obtain the first reference signal, and send the first reference signal to the terminal, so that the terminal can feed back the i-th data according to the first reference signal The CQI of the stream.
  • the present application provides a base station, where the base station is configured to perform the method described in any one of the foregoing first aspects.
  • the present application provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a computer, the computer executes the method described in any one of the above-mentioned first aspects. method.
  • the fourth aspect of the present application provides a computer program product, the computer program product includes computer-executable instructions, and the computer-executable instructions are stored in a computer-readable storage medium; at least one processor of the device can read the computer-readable storage medium.
  • the computer executes the instruction, and at least one processor executes the computer-executed instruction to make the device implement the method provided by the above first aspect or any possible implementation manner of the first aspect.
  • a fifth aspect of the present application provides a communication device, and the communication device may include at least one processor, a memory, and a communication interface. At least one processor is coupled with memory and a communication interface. The memory is used to store instructions, at least one processor is used to execute the instructions, and the communication interface is used to communicate with other communication devices under the control of the at least one processor. When executed by at least one processor, the instruction causes at least one processor to execute the method in the first aspect or any possible implementation manner of the first aspect.
  • a sixth aspect of the present application provides a system-on-a-chip, where the system-on-a-chip includes a processor, configured to support a communication device to implement the functions involved in the first aspect or any possible implementation manner of the first aspect.
  • system-on-a-chip may further include a memory for storing necessary program instructions and data.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the base station obtains the precoding matrix W PMI fed back by the terminal, where the rank RI of W PMI 0 is greater than 1, then the base station sends the first reference signal to the terminal according to W PMI , and receives the terminal's feedback based on the first reference signal
  • Fig. 1-1 is a schematic diagram of the architecture of the communication system applied in the embodiment of the present application.
  • Figure 1-2 is a schematic diagram of large performance differences between data streams in this application.
  • FIG. 2 is a schematic diagram of Embodiment 1 of a method for detecting channel quality provided by an embodiment of the present application;
  • FIG. 3-1 is a schematic diagram of Embodiment 2 of the channel quality detection method provided by the embodiment of the present application.
  • Figure 3-2 is a schematic diagram of the values of k1 and k2 specified in the 3GPP agreement in this application;
  • FIG. 4 is a schematic structural diagram of a base station provided in an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a base station provided by an embodiment of the present application.
  • Embodiments of the present application provide a channel quality detection method and a base station, which are used to measure the channel quality of each data stream.
  • the technical solution of the embodiment of the present application can be applied to various communication systems, such as code division multiple access (code division multiple access, CDMA), time division multiple access (time division multiple access, TDMA), frequency division multiple access (frequency division multiple access) , FDMA), orthogonal frequency-division multiple access (OFDMA), single carrier frequency-division multiple access (single carrier FDMA, SC-FDMA) and other systems, etc.
  • code division multiple access code division multiple access
  • time division multiple access time division multiple access
  • frequency division multiple access frequency division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency-division multiple access
  • single carrier frequency-division multiple access single carrier frequency-division multiple access
  • SC-FDMA single carrier frequency-division multiple access
  • the term “system” can be used interchangeably with "network”.
  • the CDMA system can implement wireless technologies such as universal terrestrial radio access (UTRA), CDMA2000, and the like.
  • UTRA may include wideband CDMA (wideband
  • CDMA2000 can cover interim standard (interim standard, IS) 2000 (IS-2000), IS-95 and IS-856 standards.
  • a TDMA system may implement a wireless technology such as global system for mobile communication (GSM).
  • GSM global system for mobile communication
  • OFDMA system can implement such as evolved universal wireless terrestrial access (evolved UTRA, E-UTRA), ultra mobile broadband (umb), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash OFDMA and other wireless technologies.
  • UTRA and E-UTRA are UMTS and UMTS evolutions.
  • 3GPP in long term evolution (long term evolution, LTE) and various versions based on LTE evolution are new versions of UMTS using E-UTRA.
  • the technical solution of the embodiment of the present application can also be applied to the new radio (new radio, NR) system in the fifth generation (5th generation, 5G) mobile communication system of the long term evolution (long term evolution, LTE) system and the future mobile communication system wait.
  • the communication system 100 includes a radio access network device 110 and a terminal 120 .
  • the terminal 120 is connected to the radio access network device 110 in a wireless manner
  • the radio access network device 110 is connected to the core network device in a wireless or wired manner.
  • the terminal 120 in this embodiment of the present application may be called a terminal (terminal), a user equipment (user equipment, UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal, MT) and the like.
  • the terminal 120 may be a mobile phone, a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) terminal, or an industrial control (industrial control) terminal.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the terminal 120 .
  • the wireless access network device 110 in the embodiment of the present application is an access device for the terminal 120 to access the communication system 100 through wireless means, and may be a base station NodeB, an evolved base station (evolved NodeB, eNB), a sending and receiving point ( transmission reception point, TRP), the next generation base station (next generation NodeB, gNB) in the 5G mobile communication system, the base station in the future mobile communication system or the access node in the WiFi system, etc.
  • eNB evolved base station
  • TRP transmission reception point
  • gNB next generation base station in the 5G mobile communication system
  • the base station in the future mobile communication system or the access node in the WiFi system etc.
  • the terminal 120 may be fixed or movable. It should be noted that the radio access network device 110 and the terminal 120 can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, drones, balloons and on the satellite. The embodiments of the present application do not limit the application scenarios of the radio access network device 110 and the terminal 120 .
  • the terminal 120 may be a terminal using LTE, or a terminal using NR. In this embodiment of the present application, description is made by taking the terminal 120 as a terminal using NR as an example.
  • the terminal 120 or the radio access network device 110 includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also called main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, for example, Linux operating system, Unix operating system, Android operating system, iOS operating system, or windows operating system.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • FIG. 1-1 is only a schematic diagram, and the communication system 100 may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 1-1 .
  • various aspects or features of the present application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques.
  • article of manufacture covers a computer program accessible from any computer readable device, carrier or media.
  • computer-readable media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or tapes, etc.), optical disks (e.g., compact discs (compact discs, CDs), digital versatile discs (digital versatile discs, DVDs), etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), card, stick or key drive, etc.).
  • magnetic storage devices e.g., hard disks, floppy disks, or tapes, etc.
  • optical disks e.g., compact discs (compact discs, CDs), digital versatile discs (digital versatile discs, DVDs), etc.
  • smart cards and flash memory devices for example, erasable programmable read-only
  • various storage media described herein can represent one or more devices and/or other machine-readable media for storing information.
  • the term "machine-readable medium” may include, but is not limited to, wireless channels and various other media capable of storing, containing and/or carrying instructions and/or data.
  • MIMO Multiple input multiple output
  • multiple data streams correspond to one codeword, that is, share a modulation and coding scheme (MCS), when all data streams are demodulated correctly, the entire data block can be demodulated.
  • MCS modulation and coding scheme
  • the power allocation of each data stream is unreasonable, there will be large performance differences between streams, and some streams will have weak performance.
  • the weak stream performance will restrict the overall throughput of the channel. For example, as shown in Figure 1-2, the energy difference between two adjacent data streams is 20 dB. Therefore, in a MIMO system, power allocation between streams is required to improve the performance of weak streams, narrow the difference between streams, and improve channel throughput.
  • channel quality indicator CQI
  • TDD time division duplexing
  • SRS sounding reference signal
  • the uplink and downlink channels do not have reciprocity, and the base station cannot estimate the relationship between the CQI of each downlink stream according to the SRS sent by the terminal. Therefore, the FDD system needs a new method to obtain the CQI information of each stream in order to perform reasonable power allocation.
  • FDD frequency division duplexing
  • the present application proposes a method for detecting channel quality and a base station, which are used to measure the channel quality of each data stream.
  • the base station obtains the precoding matrix W PMI fed back by the terminal, where the rank RI of W PMI 0 is greater than 1, then the base station sends the first reference signal to the terminal according to W PMI , and receives the terminal's feedback based on the first reference signal Channel quality indicator CQI(i) and rank indicator RI(i), and the value of RI(i) is 1, where i is equal to any one of 1, 2,..., RI 0 , thus obtaining the CQI.
  • the foregoing embodiments introduce the communication system 100 provided by the present application, and then introduce the communication method for detecting channel quality based on the communication system 100 .
  • a wireless access device is used as an example for description.
  • the method for detecting channel quality in this application is described respectively through Embodiment 1 and Embodiment 2.
  • the channel quality detection method provided by Embodiment 1 of the present application mainly includes the following steps:
  • the base station configures a third feedback mode, and the third feedback mode instructs the terminal to feed back the PMI.
  • the base station may first configure the third feedback mode with the terminal.
  • the third feedback mode may be a channel state information-reference signal resource indicator (channel state information–reference signal resource indicator, CRI)-RI-PMI-CQI feedback mode, that is, the base station sends a reference signal to the terminal.
  • the signal (reference signal, RS) allows the terminal to feed back a rank indicator (rank indicator, RI), a precoding matrix indicator (precoding matrix indicator, PMI) and a channel quality indicator (channel quality indicator, CQI).
  • the CQI is used to indicate the channel quality measured by the terminal according to the received reference signal
  • the value of the PMI is used to represent the index of the precoding matrix W PMI
  • the value of the RI is used to represent the rank of the W PMI . It should be noted that when the base station configures the cri-RI-PMI-CQI feedback mode, it needs to perform signaling interaction with the terminal to allow the terminal to determine the cri-RI-PMI-CQI feedback mode, and the specific signaling interaction process is the existing technology, which will not be described here.
  • the third feedback mode may also be a cri-RI-PMI feedback mode, that is, the base station sends a reference signal to the terminal, so that the terminal feeds back RI and PMI instead of CQI, which is not limited here.
  • the base station uses the first weighting matrix to weight the reference signal to obtain the second reference signal, and the dimension of the first weighting matrix and the dimension of the second weighting matrix are both the number of transmit antennas ⁇ the number of antenna ports.
  • the reference signal may be channel state information (channel state information, CSI)-RS, or other types of reference signals, which are not limited here.
  • the base station first determines the weighting matrix of the CSI-RS Its dimension is the number of transmitting antennas ⁇ the number of antenna ports.
  • the dimension of is 4 ⁇ 4, that is, 4 rows and 4 columns, for example:
  • the base station uses Weight the CSI-RS to get Wherein, S CSI-RS represents a CSI-RS vector.
  • the base station sends the second reference signal to the terminal.
  • the base station when the base station uses Weighting the reference signal, we get The base station can send to the terminal through the air interface channel That is, the signal received by the terminal is
  • H is an air interface channel matrix, and its dimension is the number of receiving antennas ⁇ the number of transmitting antennas.
  • the terminal when the terminal receives The terminal can perform downlink channel estimation. It should be noted that the channel detected by the terminal is equivalent to In the embodiment of this application, the terminal can Determine the precoding matrix W PMI , where W PMI represents the precoding matrix indexed by the PMI value PMI 0 , and its dimension is the number of antenna ports ⁇ the number of data streams. Exemplarily, the terminal can sequentially select a precoding matrix W PMI from the codebook set, and calculate capacity, and then select such that The precoding matrix W PMI with the largest capacity.
  • the RI value RI 0 and the PMI value PMI 0 can be determined according to the W PMI , where RI 0 is the rank of the W PMI, and PMI 0 is the index of the W PMI .
  • the terminal can also be based on The value CQI 0 of calculating the CQI is not limited this time.
  • the base station searches the codebook set according to PMI 0 to determine W PMI .
  • the base station obtains the RI and PMI determined by the terminal, and determines W PMI according to the value of PMI PMI 0 .
  • the base station implements steps 207-212 multiple times to obtain each data stream determined by the terminal.
  • CQI(i), i 1, 2, 3, . . . , RI.
  • the base station configures a first feedback mode, where the first feedback mode instructs the terminal to feed back the CQI and RI, and limits the value of RI to 1.
  • the first feedback mode may be a cri-RI-CQI feedback mode.
  • the cri-RI-CQI feedback mode means that the base station sends a reference signal to the terminal, and the terminal feeds back RI and CQI without returning PMI.
  • the value of the RI for limiting feedback is 1 through the first feedback mode. It should be noted that when the base station configures the first feedback mode, it needs to perform signaling interaction with the terminal, so that the terminal determines the first feedback mode, and the specific signaling interaction process is in the prior art, and will not be repeated here.
  • the base station multiplies the preset first weighting matrix by the i-th column of the W PMI as the first column of the second weighting matrix, the values of the other columns of the second weighting matrix are arbitrary values, and the dimensions of the second weighting matrix are equal to is the number of transmitting antennas ⁇ the number of antenna ports.
  • the first weighting matrix is multiplied by the i-th column of W PMI , as the first column of the second weighting matrix, the values of the other columns of the second weighting matrix are arbitrary values, and the dimensions of the first weighting matrix and the second weighting matrix The dimensions of the matrix are the number of transmitting antennas ⁇ the number of antenna ports.
  • the base station weights the reference signal by using the second weighting matrix to obtain the first reference signal.
  • the reference signal may be channel state information (channel state information, CSI)-RS, or other types of reference signals, which are not limited here.
  • the base station determines the weighting matrix of the reference signal After that, use Weighting the reference signal, we get as the first reference signal.
  • the base station sends the first reference signal to the terminal.
  • the base station uses Weight the CSI-RS to get After that, it can be sent to the terminal through the air interface channel That is, the signal received by the terminal is
  • the terminal receives Next, downlink channel estimation can be performed. It should be noted that the channel detected by the terminal is equivalent to
  • the terminal since the base station is configured with the first feedback mode, the terminal does not need to feed back PMI, and its precoding matrix defaults to:
  • I represents an identity matrix whose dimension is the number of data streams ⁇ the number of data streams
  • 0 represents an all-0 matrix whose dimension is (number of antenna ports ⁇ number of data streams) ⁇ number of data streams.
  • the base station uses the calculated A i as a power allocation factor, and performs reverse water injection power allocation on the i-th data stream.
  • the channel quality detection method provided by Embodiment 2 of the present application mainly includes the following steps:
  • the base station configures a third feedback mode, where the third feedback mode instructs the terminal to feed back the PMI.
  • the base station uses the first weighting matrix to weight the reference signal to obtain the second reference signal, where the dimension of the first weighting matrix is equal to the number of transmitting antennas ⁇ the number of antenna ports as the dimension of the second weighting matrix.
  • the base station sends the second reference signal to the terminal.
  • the base station searches the codebook set according to PMI 0 to determine W PMI .
  • Steps 301-306 are the same as steps 201-206 and will not be repeated here.
  • the base station may decompose the W PMI .
  • N_1 2, 3, and 4
  • O_1 4
  • N_1 and N_2 represent the number of antenna ports in the same polarization direction in the horizontal and vertical directions respectively
  • O_1 and O_2 denote horizontal and vertical beam encryption multiples, respectively.
  • RI 0 1
  • 2, 3, and 4 4
  • W PMI does not need to be decomposed, which can be:
  • PMI(i) is determined by l, m, n, and:
  • PMI(i) is determined by l,l',m,m',n, and:
  • the base station can decompose the W PMI into RI 0 W PMI (i).
  • PMI is constituted in the following ways:
  • i 1,1 consists of log 2 N 1 O 1 bits
  • i 1,2 consists of log 2 N 2 O 2 bits
  • i 1,3 consists of 2 bits.
  • i 1,1 corresponds to the above subscript l
  • i 1,2 corresponds to the above subscript m
  • i 2 corresponds to the above subscript n. It should be noted that i 1,3 determine the values of k 1 and k 2 .
  • the base station may first configure the second feedback mode, for example, the cri-RI-PMI-CQI feedback mode.
  • the cri-RI-PMI-CQI feedback mode means: the base station sends a reference signal to the terminal, and the terminal returns the value of RI, the value of PMI and the value of CQI.
  • the base station configures the second feedback mode, it needs to perform signaling interaction with the terminal to allow the terminal to determine the second feedback mode, and the specific signaling interaction process is in the prior art and will not be described here.
  • the base station weights the reference signal by using the first weighting matrix to obtain the first reference signal.
  • the reference signal may be channel state information (channel state information, CSI)-RS, or other types of reference signals, which are not limited here.
  • the base station first determines the weighting matrix of the reference signal Its dimension is the number of transmitting antennas ⁇ the number of antenna ports.
  • the dimension of is 4 ⁇ 4, that is, 4 rows and 4 columns, for example:
  • SCSI-RS represents a reference signal CSI-RS vector.
  • the base station sends the first reference signal to the terminal.
  • the base station when the base station uses Weighting the reference signal, we get The base station can send to the terminal through the air interface channel That is, the signal received by the terminal is Wherein, the dimension of H is the number of receiving antennas ⁇ the number of transmitting antennas.
  • the terminal determines CQI(i) according to the first reference signal.
  • step 213 Please refer to step 213, which will not be repeated here.
  • a base station 400 provided by the embodiment of the present application may include: an acquisition module 401, a transceiver module 402, and a processing module 403, wherein,
  • the processing module 403 is configured to configure a first feedback mode, the first feedback mode instructs the terminal to feed back CQI and RI, and limits the value of RI to 1; the processing module 403 is also It is used to multiply the preset first weighting matrix by the i-th column of the W PMI as the first column of the second weighting matrix, the values of the other columns of the second weighting matrix are arbitrary values, and the first The dimension of the weighting matrix and the dimension of the second weighting matrix are both the number of transmitting antennas ⁇ the number of antenna ports; the processing module 403 is further configured to use the second weighting matrix to weight the reference signal to obtain the first reference signal ; The transceiving module 403 is further configured to send the first reference signal to the terminal.
  • the embodiment of the present application also provides a computer storage medium, wherein the computer storage medium stores a program, and the program executes some or all of the steps described in the above method embodiments.
  • the communication device 500 includes:
  • Receiver 501 Receiver 501 , transmitter 502 , processor 503 and memory 504 .
  • the receiver 501 , the transmitter 502 , the processor 503 and the memory 504 may be connected through a bus or in other ways, wherein connection through a bus is taken as an example in FIG. 5 .
  • the memory 504 may include read-only memory and random-access memory, and provides instructions and data to the processor 503 .
  • a part of the memory 504 may also include a non-volatile random access memory (non-volatile random access memory, NVRAM).
  • NVRAM non-volatile random access memory
  • the memory 504 stores operating systems and operating instructions, executable modules or data structures, or their subsets, or their extended sets, wherein the operating instructions may include various operating instructions for implementing various operations.
  • the operating system may include various system programs for implementing various basic services and processing hardware-based tasks.
  • the processor 503 controls the operation of the communication device 500, and the processor 503 may also be called a central processing unit (central processing unit, CPU).
  • CPU central processing unit
  • various components of the communication device 500 are coupled together through a bus system, where the bus system may include a power bus, a control bus, and a status signal bus in addition to a data bus.
  • the various buses are referred to as bus systems in the figures.
  • the methods disclosed in the foregoing embodiments of the present application may be applied to the processor 503 or implemented by the processor 503 .
  • the processor 503 may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 503 or instructions in the form of software.
  • the above-mentioned processor 503 may be a general-purpose processor, a digital signal processor (digital signal processing, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a 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 connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
  • the storage medium is located in the memory 504, and the processor 503 reads the information in the memory 504, and completes the steps of the above method in combination with its hardware.
  • the receiver 501 can be used to receive input digital or character information, and generate signal input related to the relevant settings and function control of the communication device 500.
  • the transmitter 502 can include a display device such as a display screen, and the transmitter 502 can be used to output through an external interface. Numeric or character information.
  • the processor 503 is configured to execute the channel quality detection method performed by the aforementioned base station.
  • the communication device when it is a chip, it includes: a processing unit and a communication unit, the processing unit may be, for example, a processor, and the communication unit may be, for example, an input/output interface, a pin or a circuit wait.
  • the processing unit may execute the computer-executed instructions stored in the storage unit, so that the chip in the terminal executes the method for sending wireless report information according to any one of the above-mentioned first aspects.
  • the storage unit is a storage unit in the chip, such as a register, a cache, etc.
  • the storage unit may also be a storage unit in the terminal located outside the chip, such as a read-only memory (read -only memory, ROM) or other types of static storage devices that can store static information and instructions, random access memory (random access memory, RAM), etc.
  • ROM read-only memory
  • RAM random access memory
  • the processor mentioned above can be a general-purpose central processing unit, microprocessor, ASIC, or one or more integrated circuits for controlling the program execution of the above method.
  • the device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be A physical unit can be located in one place, or it can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • the connection relationship between the modules indicates that they have communication connections, which can be specifically implemented as one or more communication buses or signal lines.
  • the essence of the technical solution of this application or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a floppy disk of a computer , U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, etc., including several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the method described in each embodiment of the present application .
  • a computer device which can be a personal computer, a server, or a network device, etc.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server, or data center Transmission to another website site, computer, server, or data center by wired (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.).
  • wired eg, coaxial cable, optical fiber, digital subscriber line (DSL)
  • wireless eg, infrared, wireless, microwave, etc.
  • the computer-readable storage medium may be any available medium that can be stored by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (such as a floppy disk, a hard disk, or a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (Solid State Disk, SSD)), etc.

Abstract

本申请实施例公开了一种信道质量的检测方法和基站,用于测量各个数据流的信道质量。在本申请中,基站获取终端反馈的预编码矩阵W PMI,其中,W PMI的秩RI 0大于1,然后基站根据W PMI向终端发送第一参考信号,并接收终端根据第一参考信号反馈的信道质量指示CQI=CQI(i)和秩指示符RI=1,其中,i等于1,2,…,RI 0中的任意一个,从而获取了至少一个数据流的CQI(i)。

Description

一种信道质量的检测方法和基站
本申请要求于2021年10月30日提交中国专利局、申请号为202111278418.5、发明名称为“一种信道质量的检测方法和基站”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域,尤其涉及一种信道质量的检测方法和基站。
背景技术
多输入多输出(multiple input multiple output,MIMO)是无线通信系统的一项关键传输技术。通过MIMO,可以实现多个天线实现多发多收,在不增加频谱资源和天线发射功率的情况下,成倍地提高信道容量,能充分利用空间资源。
在下行方向(基站到终端)上,受长期演进(long term evolution,LTE)系统第五代(5th generation,5G)的新空口(new radio,NR)协议约束,多个数据流对应1个码字,即共用一个调制编码机制(modulation and coding scheme,MCS),当所有数据流全部解调正确时,整个数据块就能被解调出来。但是,如果各数据流功率分配不合理,会出现流间性能差异大,部分流性能较弱的现象,弱流性能会制约信道的总体吞吐率。因此,在MIMO的系统中,需要进行流间功率分配,以提升弱流性能,拉近流间差异,提高信道吞吐率。
在MIMO的系统中,为了进行数据流之间的功率分配,需要获取下行信道的信道质量指示(channel quality indicator,CQI)信息,以此得到各流的功率分配因子,再根据各流的功率分配因子进行数据流之间的功率分配。在时分双工(time division duplexing,TDD)系统中,上行(终端到基站)与下行(基站到终端)信道具有互易性,即上下行信号经历的信道衰落相同,因此基站可以根据终端发送的信道探测参考信号(sounding reference signal,SRS)估计出下行各数据流的CQI信息。
但是,在频分双工(frequency division duplexing,FDD)系统,上下行信道不具有互易性,基站无法根据终端发送的SRS来估计下行各流的CQI大小关系。因此,FDD系统需要有一种新的方法来获取各流的CQI信息,以便进行合理的功率分配。
发明内容
本申请实施例提供了一种信道质量的检测方法和基站,用于测量各个数据流的信道质量。
本申请第一方面提供了一种信道质量的检测方法,包括:基站获取终端反馈的预编码矩阵W PMI,其中,W PMI的秩RI 0大于1,然后基站根据W PMI向终端发送第一参考信号,并接收终端根据第一参考信号反馈的信道质量指示CQI=CQI(i)和秩指示符RI=1,其中,i等于1,2,…,RI 0中的任意一个,从而获取了至少一个数据流的CQI(i)。
在一些可行的实现方式中,所述基站配置第一反馈模式,所述第一反馈模式指示所述终端反馈CQI和RI,且限定RI的值为1,然后将预设的第一加权矩阵乘以所述W PMI的第i列,作为第二加权矩阵的第一列,所述第二加权矩阵的其他列的值为任意值,所述第一加 权矩阵的维度和所述第二加权矩阵的维度均为发射天线数×天线端口数。那么,基站可以使用所述第二加权矩阵加权参考信号,得到所述第一参考信号,并向所述终端发送所述第一参考信号,以使得终端可以根据第一参考信号反馈第i条数据流的CQI。
在一些可行的实现方式中,基站对W PMI进行分解,得到预编码矩阵W PMI(i)及其对应的索引PMI(i),其中,i=1,2,…,RI 0,然后基站配置第二反馈模式,所述第二反馈模式指示所述终端反馈CQI、RI和预编码矩阵指示PMI,且限定RI=1、PMI=PMI(i)。那么,基站可以使用所述第一加权矩阵加权参考信号,得到所述第一参考信号,并所述基站向所述终端发送所述第一参考信号以使得终端可以根据第一参考信号反馈第i条数据流的CQI。
在一些可行的实现方式中,基站根据所述CQI(i)(i=1,2,…,RI 0)计算进行流间反注水功率分配,得到第i条数据流的功率分配因子,从而可以对各个数据流进行功率分配。
在一些可行的实现方式中,所述基站配置第三反馈模式,所述第三反馈模式指示所述终端反馈PMI;所述基站使用第一加权矩阵加权参考信号,得到第二参考信号,所述第一加权矩阵的维度为发射天线数×天线端口数;所述基站向所述终端发送所述第二参考信号;所述基站接收所述终端根据所述第二参考信号反馈的PMI=PMI 0;所述基站根据所述PMI 0搜索码本集合,以确定所述W PMI。那么,基站可以获取终端反馈的W PMI
第二方面,本申请提供一种基站,所述基站用于执行前述第一方面中任一项所述的方法。
第三方面,本申请提供了一种计算机可读存储介质,所述计算机可读存储介质中存储有指令,当其在计算机上运行时,使得计算机执行上述第一方面中任一项所述的方法。
本申请第四方面提供一种计算机程序产品,该计算机程序产品包括计算机执行指令,该计算机执行指令存储在计算机可读存储介质中;设备的至少一个处理器可以从计算机可读存储介质读取该计算机执行指令,至少一个处理器执行该计算机执行指令使得设备实施上述第一方面或者第一方面的任一种可能的实现方式所提供的方法。
本申请第五方面提供一种通信装置,该通信装置可以包括至少一个处理器、存储器和通信接口。至少一个处理器与存储器和通信接口耦合。存储器用于存储指令,至少一个处理器用于执行该指令,通信接口用于在至少一个处理器的控制下与其他通信装置进行通信。该指令在被至少一个处理器执行时,使至少一个处理器执行第一方面或第一方面的任意可能的实现方式中的方法。
本申请第六方面提供了一种芯片系统,该芯片系统包括处理器,用于支持通信装置实现上述第一方面或第一方面任意一种可能的实现方式中所涉及的功能。
在一种可能的设计中,芯片系统还可以包括存储器,存储器,用于保存必要的程序指令和数据。该芯片系统,可以由芯片构成,也可以包含芯片和其他分立器件。
其中,第二至第六方面或者其中任一种可能实现方式所带来的技术效果可参见第一方面或第一方面不同可能实现方式所带来的技术效果,此处不再赘述。
从以上技术方案可以看出,本申请实施例具有以下优点:
在本申请中,基站获取终端反馈的预编码矩阵W PMI,其中,W PMI的秩RI 0大于1,然后基站根据W PMI向终端发送第一参考信号,并接收终端根据第一参考信号反馈的信道质量指示CQI=CQI(i)和秩指示符RI=1,其中,i等于1,2,…,RI 0中的任意一个,从而获取了至少一个数据流的CQI(i)。
附图说明
图1-1本申请的实施例应用的通信系统的架构示意图;
图1-2为本申请中数据流之间性能差异大的示意图;
图2为本申请实施例提供的信道质量的检测方法的实施例一的示意图;
图3-1为本申请实施例提供的信道质量的检测方法的实施例二的示意图;
图3-2为本申请中3GPP协议中规定的k 1和k 2的值的示意图;
图4为本申请实施例提供的一种基站的结构示意图;
图5为本申请实施例提供的一种基站的结构示意图。
具体实施方式
本申请实施例提供了一种信道质量的检测方法和基站,用于测量各个数据流的信道质量。
下面结合附图,对本申请的实施例进行描述。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的术语在适当情况下可以互换,这仅仅是描述本申请的实施例中对相同属性的对象在描述时所采用的区分方式。此外,术语“包括”和“具有”以及他们的任何变形,意图在于覆盖不排他的包含,以便包含一系列单元的过程、方法、系统、产品或设备不必限于那些单元,而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它单元。
本申请实施例的技术方案可以应用于各种通信系统,例如码分多址(code division multiple access,CDMA)、时分多址(time division multiple access,TDMA)、频分多址(frequency division multiple access,FDMA)、正交频分多址(orthogonal frequency-division multiple access,OFDMA)、单载波频分多址(single carrier FDMA,SC-FDMA)和其它系统等。术语“系统”可以和“网络”相互替换。CDMA系统可以实现例如通用无线陆地接入(universal terrestrial radio access,UTRA),CDMA2000等无线技术。UTRA可以包括宽带CDMA(wideband CDMA,WCDMA)技术和其它CDMA变形的技术。CDMA2000可以覆盖过渡标准(interim standard,IS)2000(IS-2000),IS-95和IS-856标准。TDMA系统可以实现例如全球移动通信系统(global system for mobile communication,GSM)等无线技术。OFDMA系统可以实现诸如演进通用无线陆地接入(evolved UTRA,E-UTRA)、超级移动宽带(ultra mobile broadband,UMB)、IEEE 802.11(Wi-Fi),IEEE 802.16(WiMAX),IEEE 802.20,Flash OFDMA等无线技术。UTRA和E-UTRA是UMTS以及UMTS演进版本。3GPP在长期演进(long term evolution,LTE)和基于LTE演进的各种版本是使用E-UTRA的UMTS的新版本。本申请实施例的技术方案还可以应用于长期演进(long term evolution,LTE)系统第五代(5th generation,5G)移动通信系统中的新无线(new radio,NR)系统以及未来的移动通信系统等。
本申请实施例描述的系统架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案,并不构成对于本申请实施例提供的技术方案的限定,本领域普通技术人员可知, 随着网络架构的演变和新业务场景的出现,本申请实施例提供的技术方案对于类似的技术问题,同样适用。
如图1-1所示,为本申请的实施例应用的通信系统的架构示意图。该通信系统100包括无线接入网设备110和终端120。其中,终端120通过无线的方式与无线接入网设备110相连,无线接入网设备110通过无线或有线方式与核心网设备连接。
本申请实施例中的终端120可以称为终端(terminal)、用户设备(user equipment,UE)、移动台(mobile station,MS)、移动终端(mobile terminal,MT)等。终端120可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality,VR)终端、增强现实(augmented reality,AR)终端、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请的实施例对终端120所采用的具体技术和具体设备形态不做限定。
本申请实施例中的无线接入网设备110是终端120通过无线方式接入到该通信系统100中的接入设备,可以是基站NodeB、演进型基站(evolved NodeB,eNB)、发送接收点(transmission reception point,TRP)、5G移动通信系统中的下一代基站(next generation NodeB,gNB)、未来移动通信系统中的基站或WiFi系统中的接入节点等。
在一些可行的实现方式中,终端120可以是固定位置的,也可以是可移动的。需要说明的是,无线接入网设备110和终端120可以部署在陆地上,包括室内或室外、手持或车载;也可以部署在水面上;还可以部署在空中的飞机、无人机、气球和卫星上。本申请的实施例对无线接入网设备110和终端120的应用场景不做限定。其中,终端120可以为使用LTE的终端,也可以为使用NR的终端。在本申请实施例中,以终端120为使用NR的终端为例进行说明。
在本申请实施例中,终端120或无线接入网设备110包括硬件层、运行在硬件层之上的操作系统层,以及运行在操作系统层上的应用层。该硬件层包括中央处理器(centralprocessing unit,CPU)、内存管理单元(memory management unit,MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统,例如,Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。
需要说明的是,图1-1只是示意图,该通信系统100中还可以包括其它网络设备,如还可以包括无线中继设备和无线回传设备,在图1-1中未画出。
另外,本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如,计算机可读介质可以包括,但不限于:磁存储器件(例如,硬盘、软盘或磁带等),光盘(例如,压缩盘(compact disc,CD)、数字通用盘(digital versatile disc,DVD)等),智能卡和闪存器件(例如,可擦写可编程只读存储器(erasable programmableread-only memory,EPROM)、卡、棒或钥匙驱动器等)。另外,本文描述的各 种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于,无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
多输入多输出(multiple input multiple output,MIMO)是无线通信系统的一项关键传输技术。通过MIMO,可以实现多个天线实现多发多收,在不增加频谱资源和天线发射功率的情况下,成倍地提高信道容量,能充分利用空间资源。
在下行方向(基站到终端)上,受5G的新空口(new radio,NR)协议约束,多个数据流对应1个码字,即共用一个调制编码机制(modulation and coding scheme,MCS),当所有数据流全部解调正确时,整个数据块就能被解调出来。但是,如果各数据流功率分配不合理,会出现流间性能差异大,部分流性能较弱的现象,弱流性能会制约信道的总体吞吐率。例如,如图1-2所示,相邻的2条数据流之间的能量相差20dB。因此,在MIMO的系统中,需要进行流间功率分配,以提升弱流性能,拉近流间差异,提高信道吞吐率。
在MIMO的系统中,为了进行数据流之间的功率分配,需要获取下行信道的信道质量指示(channel quality indicator,CQI)信息,以此得到各流的功率分配因子,再根据各流的功率分配因子进行数据流之间的功率分配。在时分双工(time division duplexing,TDD)系统中,上行(终端到基站)与下行(基站到终端)信道具有互易性,即上下行信号经历的信道衰落相同,因此基站可以根据终端发送的信道探测参考信号(sounding reference signal,SRS)估计出下行各数据流的CQI信息。
但是,在频分双工(frequency division duplexing,FDD)系统,上下行信道不具有互易性,基站无法根据终端发送的SRS来估计下行各流的CQI大小关系。因此,FDD系统需要有一种新的方法来获取各流的CQI信息,以便进行合理的功率分配。
为此,本申请提出了一种信道质量的检测方法和基站,用于测量各个数据流的信道质量。在本申请中,基站获取终端反馈的预编码矩阵W PMI,其中,W PMI的秩RI 0大于1,然后基站根据W PMI向终端发送第一参考信号,并接收终端根据第一参考信号反馈的信道质量指示CQI(i)和秩指示符RI(i),且RI(i)的值为1,其中,i等于1,2,…,RI 0中的任意一个,从而获取了各个数据流的CQI。
前述实施例介绍了本申请提供给的通信系统100,接下来介绍基于该通信系统100执行的信道质量的检测通信方法。在本申请实施例,以无线接入设备为基站为例进行说明。在本申请中,通过实施例一和实施例二分别对本申请的信道质量的检测方法进行说明。
请参阅图2所示,本申请的实施例一提供的信道质量的检测方法主要包括如下步骤:
201、基站配置第三反馈模式,第三反馈模式指示终端反馈PMI。
在本申请实施例中,基站可以首先与终端之间配置第三反馈模式。在一些可行的实现方式中,第三反馈模式可以为信道状态信息参考信号资源指示符(channel state information–reference signal resource indicator,CRI)-RI-PMI-CQI反馈模式,即,基站向终端发送参考信号(reference signal,RS),让终端反馈秩指示符(rank indicator,RI)、预编码矩阵指示(precoding matrix indicator,PMI)和信道质量指示(channel quality indicator,CQI)。需要说明的是,CQI用于指示终端根据接收到的参考信号进行测量的信道质量,PMI的值用于表示预编码矩阵W PMI的索引,RI的值用于表示 W PMI的秩。需要说明的是,基站配置cri-RI-PMI-CQI反馈模式时,需要与终端进行信令交互,以让终端确定cri-RI-PMI-CQI反馈模式,而具体的信令交互过程为现有技术,此处不做赘述。在一些可行的实现方式中,第三反馈模式还可以是cri-RI-PMI反馈模式,即基站向终端发送参考信号,让终端反馈RI和PMI,而不反馈CQI,此处不做限定。
202、基站使用第一加权矩阵加权参考信号,得到第二参考信号,第一加权矩阵的维度和第二加权矩阵的维度均为发射天线数×天线端口数。
在一些可行的实现方式中,参考信号可以为信道状态信息(channel state information,CSI)-RS,也可以为其他类型的参考信号,此处不做限定。
在本申请实施例中,基站首先确定CSI-RS的加权矩阵
Figure PCTCN2022120096-appb-000001
其维度为发射天线数×天线端口数。在本申请实施例中,以基站的发射天线数为4、天线端口数为4(即4T4P)为例,
Figure PCTCN2022120096-appb-000002
的维度为4×4,即4行4列,例如:
Figure PCTCN2022120096-appb-000003
然后,基站使用
Figure PCTCN2022120096-appb-000004
对CSI-RS进行加权,得到
Figure PCTCN2022120096-appb-000005
其中,S CSI-RS表示CSI-RS矢量。
203、基站向终端发送第二参考信号。
在本申请实施例中,当基站使用
Figure PCTCN2022120096-appb-000006
对参考信号进行加权,得到
Figure PCTCN2022120096-appb-000007
基站可以通过空中接口信道向终端发送
Figure PCTCN2022120096-appb-000008
即终端接收到的信号为
Figure PCTCN2022120096-appb-000009
其中,H为空口信道矩阵,其维度为接收天线数×发射天线数。
204、终端根据第二参考信号确定PMI=PMI 0和RI=RI 0
在本申请实施例中,当终端接收到
Figure PCTCN2022120096-appb-000010
终端可以进行下行信道估计。需要说明的是,终端检测的信道等效于
Figure PCTCN2022120096-appb-000011
在本申请实施例中,终端可以根据
Figure PCTCN2022120096-appb-000012
确定预编码矩阵W PMI,其中,W PMI表示以PMI的值PMI 0为索引的预编码矩阵,其维度为天线端口数×数据流数。示例性的,终端可以依次从码本集合中选出一个预编码矩阵W PMI,并计算
Figure PCTCN2022120096-appb-000013
的容量,然后选择使得
Figure PCTCN2022120096-appb-000014
容量最大的预编码矩阵W PMI。当确定预编码矩阵W PMI之后,可以根据W PMI确定RI的值RI 0和PMI的值PMI 0,RI 0为W PMI的秩,PMI 0为W PMI的索引。例如,选择的预编码矩阵W PMI的维度为4×2,则RI 0=2。在一些可行的实现方式中,终端还可以基于
Figure PCTCN2022120096-appb-000015
计算CQI的值CQI 0,此次不做限定。
205、终端向基站发送PMI=PMI 0和RI=RI 0
在本申请实施例中,当终端确定了CQI的值CQI 0、PMI的值PMI 0和RI的值RI 0之后,可以根据配置的第三反馈模式向基站发送相应的信息。例如,若第三反馈模式指示终端反馈CQI和RI,则终端反馈CQI的值CQI 0和RI的值RI 0;若第三反馈模式指示终端反馈PMI、CQI和RI的值RI 0,则终端反馈PMI=PMI 0、CQI=CQI 0和RI=RI 0
206、基站根据PMI 0搜索码本集合,以确定W PMI
在本申请实施例中,当基站接收到PMI=PMI 0和RI=RI 0后,可以根据PMI 0从码本集合中确定对应的W PMI
上面通过步骤201-206实现了基站获取终端确定的RI和PMI,并根据PMI的值PMI 0确 定W PMI,下面基站通过多次执行步骤207-212,实现了基站获取终端确定的每条数据流的CQI(i),i=1,2,3,…,RI。
207、基站配置第一反馈模式,第一反馈模式指示终端反馈CQI和RI,且限定RI的值为1。
在本申请实施例中,第一反馈模式可以为cri-RI-CQI反馈模式。其中,cri-RI-CQI反馈模式表示,基站向终端发送参考信号,终端反馈RI和CQI,而不需要返回PMI。其中,在本申请实施例中,通过第一反馈模式,限制反馈的RI的值为1。需要说明的是,基站配置第一反馈模式时,需要与终端进行信令交互,以使得终端确定第一反馈模式,而具体的信令交互过程为现有技术,此处不做赘述。
208、基站将预设的第一加权矩阵乘以W PMI的第i列,作为第二加权矩阵的第一列,第二加权矩阵的其他列的值为任意值,第二加权矩阵的维度均为发射天线数×天线端口数。
在本申请实施例中,
Figure PCTCN2022120096-appb-000016
用于加权CSI-RS,得到
Figure PCTCN2022120096-appb-000017
其中,
Figure PCTCN2022120096-appb-000018
的维度与
Figure PCTCN2022120096-appb-000019
的维度相同,为4×4。其中,第一加权矩阵乘以W PMI的第i列,作为第二加权矩阵的第一列,第二加权矩阵的其他列的值为任意值,第一加权矩阵的维度和所述第二加权矩阵的维度均为发射天线数×天线端口数。
示例性的,基站在测量第i流的CQI=CQI(i)时,令
Figure PCTCN2022120096-appb-000020
的第1列
Figure PCTCN2022120096-appb-000021
Figure PCTCN2022120096-appb-000022
的其余列的值任意,W PMI(:,i)表示W PMI的第i列。需要说明的是,i等于1,2,…,RI。
例如,RI=4,基站在测量第1流的CQI=CQI(1)时,令
Figure PCTCN2022120096-appb-000023
的第1列
Figure PCTCN2022120096-appb-000024
的其余列的值任意,W PMI(:,1)表示W PMI的第1列。基站在测量第2流的CQI=CQI(2)时,令
Figure PCTCN2022120096-appb-000025
的第1列
Figure PCTCN2022120096-appb-000026
Figure PCTCN2022120096-appb-000027
的其余列的值任意,W PMI(:,2)表示W PMI的第2列。基站在测量第3流的CQI=CQI(3)时,令
Figure PCTCN2022120096-appb-000028
的第1列
Figure PCTCN2022120096-appb-000029
的其余列的值任意,W PMI(:,3)表示W PMI的第3列。基站在测量第4流的CQI=CQI(4)时,令
Figure PCTCN2022120096-appb-000030
的第1列
Figure PCTCN2022120096-appb-000031
的其余列的值任意,W PMI(:,4)表示W PMI的第4列。
209、基站使用第二加权矩阵加权参考信号,得到第一参考信号。
在一些可行的实现方式中,参考信号可以为信道状态信息(channel state information,CSI)-RS,也可以为其他类型的参考信号,此处不做限定。在本申请实施例中,基站确定参考信号的加权矩阵
Figure PCTCN2022120096-appb-000032
后,使用
Figure PCTCN2022120096-appb-000033
对参考信号进行加权,得到
Figure PCTCN2022120096-appb-000034
作为第一参考信号。
210、基站向终端发送第一参考信号。
在本申请实施例中,当基站使用
Figure PCTCN2022120096-appb-000035
对CSI-RS进行加权,得到
Figure PCTCN2022120096-appb-000036
后,可以通过空中接口信道向终端发送
Figure PCTCN2022120096-appb-000037
即终端接收到的信号为
Figure PCTCN2022120096-appb-000038
211、终端根据第一参考信号确定CQI=CQI(i)。
在本申请实施例中,终端接收到
Figure PCTCN2022120096-appb-000039
接着可以进行下行信道估计。需要说明的是,终端检测的信道等效于
Figure PCTCN2022120096-appb-000040
在本申请实施例中,由于基站配置了第一反馈模式,终端不需要反馈PMI,此时其预编码矩阵默认为:
Figure PCTCN2022120096-appb-000041
其中,I表示维度为数据流数×数据流数的单位阵,0表示维度为(天线端口数-数据流数)×数据流数的全0矩阵。在上述例子中,天线端口数为4,且基站限定RI=1,即数据流数=1,因此在第一反馈模式下,预编码矩阵为:
Figure PCTCN2022120096-appb-000042
当确定预编码矩阵之后,终端可以基于
Figure PCTCN2022120096-appb-000043
计算第i条数据流的CQI=CQI(i)。
212、终端向基站发送CQI=CQI(i)和RI=1。
在本申请实施例中,当终端确定了CQI=CQI(i)之后,可以向基站发送CQI=CQI(i)。同时,由于第一反馈模式中限制了反馈RI,且限制了RI=1,所以终端除了反馈CQI=CQI(i),也需要反馈RI=1。
在本申请实施例中,通过RI次执行步骤206-212,实现了基站获取终端确定的每条数据流的CQI=CQI(i),i=1,2,3,…,RI。下面,基站根据获得的CQI(i),i=1,2,3,…,RI进行反注水功率分配。
213、基站根据CQI(i)(i=1,2,…,RI 0)计算进行流间反注水功率分配,得到第i条数据流的功率分配因子。
在本申请实施例中,当基站获取每条数据流的CQI=CQI(i),i=1,2,3,…,RI后,可以对各个CQI(i)进行排序,得到c1,c2,…,cr,(r=RI)并进行如下计算:
Figure PCTCN2022120096-appb-000044
最后,基站将计算得到的A i作为功率分配因子,对第i条数据流进行反注水功率分配。
在本申请中,基站首先通过
Figure PCTCN2022120096-appb-000045
加权参考信号,得到第二参考信号,并向终端发送该第二参考信号获取终端反馈的W PMI(W PMI的秩RI 0大于1),然后基站根据W PMI的各个列和
Figure PCTCN2022120096-appb-000046
确定
Figure PCTCN2022120096-appb-000047
并使用
Figure PCTCN2022120096-appb-000048
加权参考信号,得到第一参考信号,并向终端发送该第一参考信号,通过接收终端根据该第一参考信号反馈的CQI=CQI(i)和RI=1,因此可以将CQI(i)作为各个数据流的CQI),i=1,2,…,RI,以求各个数据流的功率分配因子,并进行反注水功率分配。
请参阅图3-1所示,本申请的实施例二提供的信道质量的检测方法主要包括如下步骤:
301、基站配置第三反馈模式,第三反馈模式指示终端反馈PMI。
302、基站使用第一加权矩阵加权参考信号,得到第二参考信号,第一加权矩阵的维度为和所述第二加权矩阵的维度均发射天线数×天线端口数。
303、基站向终端发送第二参考信号。
304、终端根据第二参考信号确定PMI=PMI 0和RI=RI 0
305、终端向基站发送PMI=PMI 0和RI=RI 0
306、基站根据PMI 0搜索码本集合,以确定W PMI
步骤301-306与步骤201-206相同,此处不做赘述。
307、基站对W PMI进行分解,得到预编码矩阵W PMI(i)及其对应的索引PMI(i),其中,i=1,2,…,RI 0
在本申请实施例中,当基站确定W PMI之后,可以对W PMI进行分解。示例性的,基站可以将W PMI分解为RI 0个W PMI,分别为W PMI(i),i=1,2,…,RI。
下面,以8个天线端口为例进行说明,其中N_1=2,N_2=2,O_1=4,O_2=4为例,其中N_1和N_2分别表示水平和垂直方向上同一极化方向的天线端口数,O_1和O_2分别表示水平和垂直波束加密倍数。下面,分别以RI 0等于1、2、3、4为例进行说明。
在本申请实施例中,当RI 0=1时,W PMI不需要进行分解,可以为:
Figure PCTCN2022120096-appb-000049
其中,PMI(i)由l,m,n决定,且:
Figure PCTCN2022120096-appb-000050
Figure PCTCN2022120096-appb-000051
在本申请实施例中,当RI 0=2时,那么W PMI可以为:
Figure PCTCN2022120096-appb-000052
其中,PMI(i)由l,l’,m,m’,n决定,且:
Figure PCTCN2022120096-appb-000053
这里k 1和k 2的值基于如图3-2所示的协议确定。
对比
Figure PCTCN2022120096-appb-000054
Figure PCTCN2022120096-appb-000055
可以得知:
Figure PCTCN2022120096-appb-000056
即,RI 0=2的
Figure PCTCN2022120096-appb-000057
可以分解为2个RI 0=1的
Figure PCTCN2022120096-appb-000058
Figure PCTCN2022120096-appb-000059
在本申请实施例中,当RI=3时,那么W PMI可以为:
Figure PCTCN2022120096-appb-000060
其中,PMI(i)由l,l’,m,m’,n决定。即,RI 0=3的
Figure PCTCN2022120096-appb-000061
可以分解为3个RI 0=1的
Figure PCTCN2022120096-appb-000062
Figure PCTCN2022120096-appb-000063
Figure PCTCN2022120096-appb-000064
在本申请实施例中,当RI=4时,那么W PMI可以为:
Figure PCTCN2022120096-appb-000065
其中,PMI由l,l’,m,m’,n决定。即,RI 0=4的
Figure PCTCN2022120096-appb-000066
可以分解为4个RI 0=1的
Figure PCTCN2022120096-appb-000067
Figure PCTCN2022120096-appb-000068
Figure PCTCN2022120096-appb-000069
由此可得,基站可以将W PMI分解为RI 0个W PMI(i)。
在本申请中,基站首先获取终端反馈的预编码矩阵W PMI(W PMI的秩RI大于1),然后根据所述W PMI向所述终端发送第一参考信号,从而接收终端根据所述第一参考信号反馈的CQI=CQI(i)和RI=RI(i),且限制RI(i)=1,获取各个数据流的CQI=CQI(i),i=1,2,…,RI。
下面描述如何通过终端反馈的PMI=PMI 0求解出将W PMI分解后对应的每个RI=1的预编码矩阵的码本索引。需要说明的是,根据3GPP协议的规定,PMI通过以下方式构成:
当RI=1时,PMI由i 1,1、i 1,2、i 2组成;当RI>1时,码本索引PMI由i 1,1、i 1,2、i 1,3、i 2组成。其中,i 1,1由log 2N 1O 1个比特组成,i 1,2由log 2N 2O 2个比特组成,i 1,3由2个比特组成。RI=1时,i 2由2个比特组成;RI>1时,i 2由1个比特组成。那么,i 1,1即对应上述下标l,i 1,2即对应上述下标m,i 2即对应上述下标n。需要说明的是,i 1,3决定了k 1和k 2的值。
例如,在步骤203中终端反馈的RI 0=4,且PMI 0=10,那么
Figure PCTCN2022120096-appb-000070
因此可知i 1,1=l=0,i 1,2=m=1,i 1,3=1,i 2=n=0。由于N 1=2,N 2=2,O 1=4,O 2=4,i 1,3=1,通过查询如图3-2中的表可知k 1=0,k 2=O 2=4。
当RI 0=4时,
Figure PCTCN2022120096-appb-000071
可以分解为4个RI=1码本
Figure PCTCN2022120096-appb-000072
Figure PCTCN2022120096-appb-000073
这4个RI=1的PMI(i)分别为:
(i 1,1,i 1,2,i 2)=(l,m,n)=(0,1,0),(i 1,1,i 1,2,i 2)=(l+k 1,m+k 2,n)=(0,5,0),(i 1,1,i 1,2,i 2)=(l,m,n+2)=(0,1,2),(i 1,1,i 1,2,i 2)=(l+k 1,m+k 2,n+2)=(0,5,2)。
根据参数N 1=2,N 2=2,O 1=4,O 2=4可知i 1,1为log 2N 1O 1=3比特,i 1,2为log 2N 2O 2=3比特,而RI为1时,i 2是2比特。
因此,这4个RI=1的PMI(i)分别为:
Figure PCTCN2022120096-appb-000074
Figure PCTCN2022120096-appb-000075
Figure PCTCN2022120096-appb-000076
Figure PCTCN2022120096-appb-000077
上面通过步骤301-306实现了基站获取终端确定的RI和PMI,并通过步骤307实现了将将W PMI进行分解,得到W PMI(i)(i=1,2,…,RI),下面基站通过多次执行步骤308-312,实现了基站确定的每条数据流的CQI(i),i=1,2,3,…,RI。
308、基站配置第二反馈模式,第二反馈模式指示终端反馈CQI、RI和PMI,且限定RI=1、PMI=PMI(i)。
在本申请实施例中,基站可以首先配置第二反馈模式,例如cri-RI-PMI-CQI反馈模式。需要说明的是,cri-RI-PMI-CQI反馈模式表示:基站向终端发送参考信号,终端返回RI的值、PMI的值和CQI的值。需要说明的是,基站配置第二反馈模式时,需要与终端进行信令交互,以让终端确定第二反馈模式,而具体的信令交互过程为现有技术,此处不做赘述。需要说明的是,基站配置第二反馈模式时,可以设置终端反馈的RI=1和PMI=PMI(i)。
309、基站使用第一加权矩阵加权参考信号,得到第一参考信号。
在一些可行的实现方式中,参考信号可以为信道状态信息(channel state information,CSI)-RS,也可以为其他类型的参考信号,此处不做限定。
在本申请实施例中,基站首先确定参考信号的加权矩阵
Figure PCTCN2022120096-appb-000078
其维度为发射天线数×天线端口数。在本申请实施例中,以基站的发射天线数为4、天线端口数为4(即4T4P)为例,
Figure PCTCN2022120096-appb-000079
的维度为4×4,即4行4列,例如:
Figure PCTCN2022120096-appb-000080
然后,基站使用
Figure PCTCN2022120096-appb-000081
对参考信号进行加权,得到
Figure PCTCN2022120096-appb-000082
其中,S CSI-RS表示参考信号CSI-RS矢量。
310、基站向终端发送第一参考信号。
在本申请实施例中,当基站使用
Figure PCTCN2022120096-appb-000083
对参考信号进行加权,得到
Figure PCTCN2022120096-appb-000084
基站可以通过空中接口信道向终端发送
Figure PCTCN2022120096-appb-000085
即终端接收到的信号为
Figure PCTCN2022120096-appb-000086
其中,H的维度为接收天线数×发射天线数。
311、终端根据第一参考信号确定CQI(i)。
在本申请实施例中,当终端接收到
Figure PCTCN2022120096-appb-000087
可以进行下行信道估计。需要说明的是,终端检测的信道等效于
Figure PCTCN2022120096-appb-000088
在本申请实施例中,终端可以确定可以根据限制的PMI=PMI(i)确定W PMI(i)。然后,终端基于
Figure PCTCN2022120096-appb-000089
计算CQI(i)。
312、终端向基站发送CQI=CQI(i)、PMI=PMI(i)和RI=RI(i)。
在本申请实施例中,当终端确定了CQI=CQI(i)之后,可以向基站发送CQI=CQI(i)、PMI=PMI(i)以及RI=RI(i)=1。
313、基站根据CQI(i)(i=1,2,…,RI0)计算进行流间反注水功率分配,得到第i条 数据流的功率分配因子。
请参考步骤213,此处不做赘述。
在本申请中,在本申请中,基站首先通过
Figure PCTCN2022120096-appb-000090
加权参考信号,得到第二参考信号,并向终端发送该第二参考信号获取终端反馈的预编码矩阵W PMI(W PMI的秩RI大于1),然后基站根据RI=RI 0将W PMI分解为RI 0个W PMI(i),然后基站配置与终端之间的第二反馈模式,从而限制终端反馈PMI=PMI(i)及RI=1,并使用
Figure PCTCN2022120096-appb-000091
加权参考信号,得到第一参考信号,并向终端发送该第一参考信号,从而接收终端根据该第一参考信号反馈的CQI=CQI(i)、PMI=PMI(i)和RI=1,由于限制了RI=1和PMI=PMI(i),因此可以将CQI=CQI(i)作为各个数据流的CQI,i=1,2,…,RI。
需要说明的是,对于前述的各方法实施例,为了简单描述,故将其都表述为一系列的动作组合,但是本领域技术人员应该知悉,本申请并不受所描述的动作顺序的限制,因为依据本申请,某些步骤可以采用其他顺序或者同时进行。其次,本领域技术人员也应该知悉,说明书中所描述的实施例均属于优选实施例,所涉及的动作和模块并不一定是本申请所必须的。
为便于更好的实施本申请实施例的上述方案,下面还提供用于实施上述方案的相关装置。
请参阅图4所示,本申请实施例提供的一种基站400,可以包括:获取模块401、收发模块402和处理模块403,其中,
获取模块401,用于获取终端反馈的预编码矩阵W PMI,其中,所述W PMI的秩RI 0大于1;收发模块402,用于根据所述W PMI向所述终端发送第一参考信号;所述收发模块402,还用于接收所述终端根据所述第一参考信号反馈的信道质量指示CQI=CQI(i)和秩指示符RI=1,i等于1、2、…、RI 0中的任意一个。
在一些可行的实现方式中,处理模块403,用于配置第一反馈模式,所述第一反馈模式指示所述终端反馈CQI和RI,且限定RI的值为1;所述处理模块403,还用于将预设的第一加权矩阵乘以所述W PMI的第i列,作为第二加权矩阵的第一列,所述第二加权矩阵的其他列的值为任意值,所述第一加权矩阵的维度和所述第二加权矩阵的维度均为发射天线数×天线端口数;所述处理模块403,还用于使用所述第二加权矩阵加权参考信号,得到所述第一参考信号;所述收发模块403,还用于向所述终端发送所述第一参考信号。
在一些可行的实现方式中,所述处理模块403,还用于对W PMI进行分解,得到预编码矩阵W PMI(i)及其对应的索引PMI(i),其中,i=1,2,…,RI 0;所述处理模块403,还用于配置第二反馈模式,所述第二反馈模式指示所述终端反馈CQI、RI和预编码矩阵指示PMI,且限定RI=1、PMI=PMI(i);所述处理模块403,还用于使用所述第一加权矩阵加权参考信号,得到所述第一参考信号;所述收发模块402,还用于向所述终端发送所述第一参考信号。
在一些可行的实现方式中,所述处理模块403,还用于根据所述CQI(i)(i=1,2,…,RI 0)计算进行流间反注水功率分配,得到第i条数据流的功率分配因子。
在一些可行的实现方式中,所述处理模块403,还用于配置第三反馈模式,所述第三反馈模式指示所述终端反馈PMI;所述处理模块403,还用于使用第一加权矩阵加权参考信号,得到第二参考信号,所述第一加权矩阵的维度为发射天线数×天线端口数;所述收发 模块402,还用于向所述终端发送所述第二参考信号;所述收发模块402,还用于接收所述终端根据所述第二参考信号反馈的PMI=PMI 0;所述处理模块403,还用于根据所述PMI 0搜索码本集合,以确定所述W PMI
需要说明的是,上述装置各模块/单元之间的信息交互、执行过程等内容,由于与本申请方法实施例基于同一构思,其带来的技术效果与本申请方法实施例相同,具体内容可参见本申请前述所示的方法实施例中的叙述,此处不再赘述。
本申请实施例还提供一种计算机存储介质,其中,该计算机存储介质存储有程序,该程序执行包括上述方法实施例中记载的部分或全部步骤。
接下来介绍本申请实施例提供的一种通信装置,请参阅图5所示,通信装置500包括:
接收器501、发射器502、处理器503和存储器504。在本申请的一些实施例中,接收器501、发射器502、处理器503和存储器504可通过总线或其它方式连接,其中,图5中以通过总线连接为例。
存储器504可以包括只读存储器和随机存取存储器,并向处理器503提供指令和数据。存储器504的一部分还可以包括非易失性随机存取存储器(non-volatile random access memory,NVRAM)。存储器504存储有操作系统和操作指令、可执行模块或者数据结构,或者它们的子集,或者它们的扩展集,其中,操作指令可包括各种操作指令,用于实现各种操作。操作系统可包括各种系统程序,用于实现各种基础业务以及处理基于硬件的任务。
处理器503控制通信装置500的操作,处理器503还可以称为中央处理单元(central processing unit,CPU)。具体的应用中,通信装置500的各个组件通过总线系统耦合在一起,其中总线系统除包括数据总线之外,还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见,在图中将各种总线都称为总线系统。
上述本申请实施例揭示的方法可以应用于处理器503中,或者由处理器503实现。处理器503可以是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法的各步骤可以通过处理器503中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器503可以是通用处理器、数字信号处理器(digital signal processing,DSP)、专用集成电路(application specific integrated circuit,ASIC)、现场可编程门阵列
(field-programmable gate array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器504,处理器503读取存储器504中的信息,结合其硬件完成上述方法的步骤。
接收器501可用于接收输入的数字或字符信息,以及产生与通信装置500的相关设置以及功能控制有关的信号输入,发射器502可包括显示屏等显示设备,发射器502可用于通过外接接口输出数字或字符信息。
本申请实施例中,处理器503,用于执行前述基站执行的信道质量的检测方法。
在另一种可能的设计中,当通信装置为芯片时,包括:处理单元和通信单元,所述处理单元例如可以是处理器,所述通信单元例如可以是输入/输出接口、管脚或电路等。该处理单元可执行存储单元存储的计算机执行指令,以使该终端内的芯片执行上述第一方面任意一项的无线报告信息的发送方法。可选地,所述存储单元为所述芯片内的存储单元,如寄存器、缓存等,所述存储单元还可以是所述终端内的位于所述芯片外部的存储单元,如只读存储器(read-only memory,ROM)或可存储静态信息和指令的其他类型的静态存储设备,随机存取存储器(random access memory,RAM)等。
其中,上述任一处提到的处理器,可以是一个通用中央处理器,微处理器,ASIC,或一个或多个用于控制上述方法的程序执行的集成电路。
另外需说明的是,以上所描述的装置实施例仅仅是示意性的,其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。另外,本申请提供的装置实施例附图中,模块之间的连接关系表示它们之间具有通信连接,具体可以实现为一条或多条通信总线或信号线。
通过以上的实施方式的描述,所属领域的技术人员可以清楚地了解到本申请可借助软件加必需的通用硬件的方式来实现,当然也可以通过专用硬件包括专用集成电路、专用CPU、专用存储器、专用元器件等来实现。一般情况下,凡由计算机程序完成的功能都可以很容易地用相应的硬件来实现,而且,用来实现同一功能的具体硬件结构也可以是多种多样的,例如模拟电路、数字电路或专用电路等。但是,对本申请而言更多情况下软件程序实现是更佳的实施方式。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软件产品存储在可读取的存储介质中,如计算机的软盘、U盘、移动硬盘、ROM、RAM、磁碟或者光盘等,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述的方法。
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。
所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一计算机可读存储介质传输,例如,所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存储的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质,(例如,软盘、硬盘、磁带)、光介质(例如,DVD)、或者半导体介质(例如固态硬盘(Solid State Disk,SSD))等。

Claims (14)

  1. 一种信道质量的检测方法,其特征在于,包括:
    基站获取终端反馈的预编码矩阵W PMI,其中,所述W PMI的秩RI 0大于1;
    所述基站根据所述W PMI向所述终端发送第一参考信号;
    所述基站接收所述终端根据所述第一参考信号反馈的信道质量指示CQI=CQI(i)和秩指示符RI=1,i等于1、2、…、RI 0中的任意一个。
  2. 根据权利要求1所述方法,其特征在于,所述基站根据所述W PMI向所述终端发送第一参考信号包括:
    所述基站配置第一反馈模式,所述第一反馈模式指示所述终端反馈CQI和RI,且限定RI的值为1;
    所述基站将预设的第一加权矩阵乘以所述W PMI的第i列,作为第二加权矩阵的第一列,所述第二加权矩阵的其他列的值为任意值,所述第一加权矩阵的维度和所述第二加权矩阵的维度均为发射天线数×天线端口数;
    所述基站使用所述第二加权矩阵加权参考信号,得到所述第一参考信号;
    所述基站向所述终端发送所述第一参考信号。
  3. 根据权利要求1所述方法,其特征在于,所述基站根据所述W PMI向所述终端发送第一参考信号包括:
    所述基站对W PMI进行分解,得到预编码矩阵W PMI(i)及其对应的索引PMI(i),其中,i=1,2,…,RI 0
    所述基站配置第二反馈模式,所述第二反馈模式指示所述终端反馈CQI、RI和预编码矩阵指示PMI,且限定RI=1、PMI=PMI(i);
    所述基站使用所述第一加权矩阵加权参考信号,得到所述第一参考信号;
    所述基站向所述终端发送所述第一参考信号。
  4. 根据权利要求1-3中任一项所述方法,其特征在于,所述基站接收所述终端根据所述第一参考信号反馈的CQI(i)和RI(i)之后,还包括:
    所述基站根据所述CQI(i)(i=1,2,…,RI 0)计算进行流间反注水功率分配,得到第i条数据流的功率分配因子。
  5. 根据权利要求1-4中任一项所述方法,其特征在于,所述基站获取终端反馈的W PMI包括:
    所述基站配置第三反馈模式,所述第三反馈模式指示所述终端反馈PMI;
    所述基站使用第一加权矩阵加权参考信号,得到第二参考信号,所述第一加权矩阵的维度为发射天线数×天线端口数;
    所述基站向所述终端发送所述第二参考信号;
    所述基站接收所述终端根据所述第二参考信号反馈的PMI=PMI 0
    所述基站根据所述PMI 0搜索码本集合,以确定所述W PMI
  6. 一种基站,其特征在于,包括:
    获取模块,用于获取终端反馈的预编码矩阵W PMI,其中,所述W PMI的秩RI 0大于1;
    收发模块,用于根据所述W PMI向所述终端发送第一参考信号;
    所述收发模块,还用于接收所述终端根据所述第一参考信号反馈的信道质量指示CQI=CQI(i)和秩指示符RI=1,i等于1、2、…、RI 0中的任意一个。
  7. 根据权利要求6所述基站,其特征在于,还包括:
    处理模块,用于配置第一反馈模式,所述第一反馈模式指示所述终端反馈CQI和RI,且限定RI的值为1;
    所述处理模块,还用于将预设的第一加权矩阵乘以所述W PMI的第i列,作为第二加权矩阵的第一列,所述第二加权矩阵的其他列的值为任意值,所述第一加权矩阵的维度和所述第二加权矩阵的维度均为发射天线数×天线端口数;
    所述处理模块,还用于使用所述第二加权矩阵加权参考信号,得到所述第一参考信号;
    所述收发模块,还用于向所述终端发送所述第一参考信号。
  8. 根据权利要求6所述基站,其特征在于,
    所述处理模块,还用于对W PMI进行分解,得到预编码矩阵W PMI(i)及其对应的索引PMI(i),其中,i=1,2,…,RI 0
    所述处理模块,还用于配置第二反馈模式,所述第二反馈模式指示所述终端反馈CQI、RI和预编码矩阵指示PMI,且限定RI=1、PMI=PMI(i);
    所述处理模块,还用于使用所述第一加权矩阵加权参考信号,得到所述第一参考信号;
    所述收发模块,还用于向所述终端发送所述第一参考信号。
  9. 根据权利要求6-8中任一项所述基站,其特征在于,
    所述处理模块,还用于根据所述CQI(i)(i=1,2,…,RI 0)计算进行流间反注水功率分配,得到第i条数据流的功率分配因子。
  10. 根据权利要求6-9中任一项所述基站,其特征在于,
    所述处理模块,还用于配置第三反馈模式,所述第三反馈模式指示所述终端反馈PMI;
    所述处理模块,还用于使用第一加权矩阵加权参考信号,得到第二参考信号,所述第一加权矩阵的维度为发射天线数×天线端口数;
    所述收发模块,还用于向所述终端发送所述第二参考信号;
    所述收发模块,还用于接收所述终端根据所述第二参考信号反馈的PMI=PMI 0
    所述处理模块,还用于根据所述PMI 0搜索码本集合,以确定所述W PMI
  11. 一种计算机可读存储介质,其特征在于,该计算机可读存储介质存储有程序,所述程序使得计算机设备执行如权利要求1-5中任一项的方法。
  12. 一种计算机程序产品,其特征在于,所述计算机程序产品包括计算机执行指令,所述计算机执行指令存储在计算机可读存储介质中;设备的至少一个处理器从所述计算机可读存储介质中读取所述计算机执行指令,所述至少一个处理器执行所述计算机执行指令使得所述设备执行如权利要求1-5中任一项的方法。
  13. 一种通信装置,其特征在于,所述通信装置包括至少一个处理器、存储器和通信接口;
    所述至少一个处理器与所述存储器和所述通信接口耦合;
    所述存储器用于存储指令,所述处理器用于执行所述指令,所述通信接口用于在所述至少一个处理器的控制下与其他通信装置进行通信;
    所述指令在被所述至少一个处理器执行时,使所述至少一个处理器执行如权利要求1-5中任一项的方法。
  14. 一种芯片系统,其特征在于,所述芯片系统包括处理器和存储器,所述存储器和所述处理器通过线路互联,所述存储器中存储有指令,所述处理器用于执行如权利要求1-5中任一项的方法。
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