WO2021088501A1 - Procédé et dispositif de détermination de livre de codes - Google Patents

Procédé et dispositif de détermination de livre de codes Download PDF

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Publication number
WO2021088501A1
WO2021088501A1 PCT/CN2020/113792 CN2020113792W WO2021088501A1 WO 2021088501 A1 WO2021088501 A1 WO 2021088501A1 CN 2020113792 W CN2020113792 W CN 2020113792W WO 2021088501 A1 WO2021088501 A1 WO 2021088501A1
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Prior art keywords
subband
virtual
subbands
codebook
configuration
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PCT/CN2020/113792
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English (en)
Chinese (zh)
Inventor
马大为
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北京紫光展锐通信技术有限公司
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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
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0658—Feedback reduction

Definitions

  • the present disclosure relates to the field of wireless communication, and in particular to a method and device for determining a codebook.
  • the precoding technology is a technology that uses the channel state information to preprocess the signal to be transmitted when the channel state information is known or available at the transmitting end.
  • precoding techniques can be divided into codebook-based precoding methods and non-codebook precoding methods.
  • the codebook-based precoding method is to share a known codebook set at both the receiving end and the transmitting end.
  • the receiving end can determine the codebook that is fed back to the transmitting end from the codebook set, so that the transmitting end can perform processing based on the feedback codebook.
  • Precoding Therefore, how to determine the codebook for feedback becomes very important for the precoding process based on the codebook.
  • the present disclosure proposes a method and device for determining a codebook.
  • the technical solution is as follows:
  • a method for determining a codebook including:
  • Receive codebook configuration information obtain the actual number of first subbands according to the codebook configuration information, where the first subband is used for precoding calculation; perform according to the actual number of first subbands Precoding calculation to get the codebook.
  • the performing precoding calculation according to the actual number of the first subbands to obtain the codebook includes: performing precoding according to the first subbands matching the actual number of subbands Calculate to get the codebook.
  • the performing precoding calculation according to the actual number of the first subbands to obtain the codebook includes: obtaining the preconfigured number of the first subbands according to the codebook configuration information When the actual number of the first subband is less than the preconfigured number, configure a virtual first subband according to the actual number of the first subband and the preconfigured number of the first subband; The first subband and the virtual first subband are combined with the pre-configured number to perform precoding calculation to obtain a codebook.
  • the obtaining the pre-configured number of the first subband according to the codebook configuration information includes: obtaining the number of the second subband and the first subband according to the codebook configuration information The division ratio of the two subbands, wherein the second subband is used for channel quality calculation, and the first subband is obtained by dividing the second subband; and the number of the second subband is compared with the number of the second subband. The product of the division ratio of the second sub-band is used as the pre-configured number of the first sub-band.
  • the configuring the virtual first subband according to the actual number of the first subband and the preconfigured number of the first subband includes: according to the number of the first subband Determine the configuration number of the virtual first subband according to the actual number and the pre-configured number of the first subband; determine the configuration position of the virtual first subband according to the configuration number; determine the virtual first subband Precoding coefficients of the subband; configure the virtual first subband according to the configuration position, the precoding coefficient, and the configuration quantity.
  • the determining the configuration number of the virtual first subband according to the actual number of the first subband and the preconfigured number of the first subband includes: The difference between the pre-configured number of first sub-bands and the actual number of the first sub-bands is used as the configured number of the virtual first sub-bands.
  • the determining the configuration position of the virtual first subband according to the configuration quantity includes: when the configuration quantity is one, in the first subband In the boundary, the side including the independent first subband is selected as the configuration position of the virtual first subband, wherein the independent first subband is the only first subband obtained by dividing the second subband One sub-band; in the case where the number of configurations is two, selection is made on both sides of the boundary of the first sub-band to obtain the configuration position of the virtual first sub-band.
  • the position includes: selecting the side with the higher frequency among the two sides of the boundary of the first subband as the configuration position of the virtual first subband; or, in the first subband On both sides of the boundary of the first subband, the side with the lower frequency is selected as the configuration position of the virtual first subband; or, both sides of the boundary of the first subband are selected as the virtual second The location of a sub-band.
  • the determining the precoding coefficient of the virtual first subband includes: determining the precoding coefficient of the virtual first subband to be zero; or, comparing with the virtual first subband The precoding coefficients of the first subband adjacent to a subband are used as the precoding coefficients of the virtual first subband; or, the average value of the precoding coefficients of the first subband is used as the virtual second Precoding coefficients for one subband.
  • the obtaining the actual number of first subbands according to the codebook configuration information includes: obtaining the number of second subbands, the second subband according to the codebook configuration information The division ratio of the subbands and the frequency domain position of each of the second subbands; according to the division ratio of the second subbands and the frequency domain position of each of the second subbands, each of the second subbands is determined separately The number of the first subbands obtained by dividing the two subbands; and obtaining the actual number of the first subbands according to the number of the first subbands obtained by dividing each of the second subbands.
  • a codebook determining device including:
  • a receiving module configured to receive codebook configuration information; an actual number determining module, configured to obtain the actual number of first subbands according to the codebook configuration information, wherein the first subband is used for precoding calculation;
  • the codebook determining module is configured to perform precoding calculations according to the actual number of the first subbands to obtain a codebook.
  • the codebook determining module is configured to perform precoding calculations according to the actual number of first subbands matching the actual number to obtain a codebook.
  • the codebook determining module includes: a pre-configured quantity obtaining unit, configured to obtain the pre-configured quantity of the first subband according to the codebook configuration information; and a virtual first subband configuration unit , Configured to configure a virtual first subband according to the actual number of the first subbands and the preconfigured number of the first subbands when the actual number of the first subbands is less than the preconfigured number;
  • the codebook determining unit is configured to perform precoding calculation according to the first subband and the virtual first subband in combination with the pre-configured number to obtain a codebook.
  • the pre-configured number obtaining unit is configured to obtain the number of second subbands and the division ratio of the second subband according to the codebook configuration information, wherein the first subband is The two sub-bands are used for channel quality calculation, the first sub-band is obtained by dividing the second sub-band; the product of the number of the second sub-band and the division ratio of the second sub-band is used as the The pre-configured number of the first subband.
  • the virtual first subband configuration unit is configured to determine the virtual first subband according to the actual number of the first subband and the preconfigured number of the first subband.
  • the configuration number of the band according to the configuration number, determine the configuration position of the virtual first subband; determine the precoding coefficient of the virtual first subband; according to the configuration position, the precoding coefficient and the Configure the number, configure the virtual first subband.
  • the virtual first sub-band configuration unit is further configured to: use the difference between the pre-configured number of the first sub-band and the actual number of the first sub-band as the virtual The number of configurations of the first subband.
  • the virtual first subband configuration unit is further configured to: when the number of configurations is one, in the boundary of the first subband, select to include independent first subbands. One side of the subband is used as the configuration position of the virtual first subband, where the independent first subband is the only first subband obtained by dividing the second subband; in the configuration number In the case of two, selection is made on both sides of the boundary of the first subband to obtain the configuration position of the virtual first subband.
  • the virtual first subband configuration unit is further configured to: select the side with the higher frequency from the two sides of the boundary of the first subband as the The configuration position of the virtual first subband; or, among the two sides of the boundary of the first subband, the side with the lower frequency is selected as the configuration position of the virtual first subband; or, Both sides of the boundary of the first subband are used as the configuration positions of the virtual first subband.
  • the virtual first subband configuration unit is further configured to: determine the precoding coefficient of the virtual first subband to be zero; The precoding coefficients of the adjacent first subband are used as the precoding coefficients of the virtual first subband; or, the average value of the precoding coefficients of the first subband is used as the virtual first subband Precoding coefficients.
  • the actual number determining module is configured to obtain the number of second subbands, the division ratio of the second subbands, and each second subband according to the codebook configuration information.
  • the frequency domain position of the subband; according to the division ratio of the second subband and the frequency domain position of each second subband, the first subband obtained by dividing each second subband is determined respectively
  • the actual number of the first subbands is obtained according to the number of the first subbands obtained by dividing each of the second subbands.
  • a codebook determining device including: a processor; a memory for storing executable instructions of the processor; wherein the processor is configured to execute the method of the first aspect.
  • a non-volatile computer-readable storage medium having computer program instructions stored thereon, and when the computer program instructions are executed by a processor, the method of the first aspect described above is implemented.
  • the codebook determination method and device of the disclosed embodiments of various aspects can determine the codebook according to the actual number of first subbands, and reduce the number of first subbands used in the process of determining the codebook through precoding calculation. Inconsistent with the actual number of first subbands, thereby improving the reliability of the codebook determination result, and then improving the accuracy of precoding.
  • Fig. 1 shows a schematic diagram of the TypeII codebook structure in Rel-15 according to an embodiment of the present disclosure.
  • Fig. 2 shows a schematic diagram of the TypeII codebook structure in Rel-16 according to an embodiment of the present disclosure.
  • Fig. 3 shows a schematic diagram of bandwidth after BWP is activated according to an embodiment of the present disclosure.
  • Fig. 4 shows a flowchart of a method for determining a codebook according to an embodiment of the present disclosure.
  • Fig. 5 shows a block diagram of an apparatus for determining a codebook according to an embodiment of the present disclosure.
  • Fig. 6 shows a block diagram of an apparatus for determining a codebook according to an embodiment of the present disclosure.
  • TypeII codebook A schematic diagram of the TypeII codebook structure in Rel-15 according to an embodiment of the present disclosure is shown, where N TX is the number of transmitting antenna ports, and L is the number of spatial beams in each polarization direction, and dual-polarized antennas are used. There are 2L airspace beams, It is the number of Precoding Matrix Indicator (PMI, Precoding Matrix Indicator) subbands in the frequency domain (corresponding to N SB in the figure), where the PMI subband is a subband used for precoding calculation.
  • PMI Precoding Matrix Indicator
  • the left side of the arrow is a codebook on a PMI subband.
  • the dimension of W space is N TX ⁇ 2L, and each column represents a spatial beam vector of length N TX ; the dimension of W 2 is 2L ⁇ 1, and each value represents a spatial beam weighting coefficient.
  • To the right of the arrow is The codebook matrix form after the codebooks of two PMI subbands are juxtaposed. Since all PMI subbands use the same set of spatial beams, the matrix W space remains unchanged, and both W and W 2 are increased by one dimension.
  • the dimension of W space is N TX ⁇ 2L, and each column represents a spatial beam vector of length N TX ; the dimension of W'is 2L ⁇ K, and each value represents a weighting coefficient; the dimension of W freq is Each line represents a length of The frequency domain beam vector.
  • the enhanced TypeII codebook in Rel-16 can be compressed in the dimension of the antenna port, and can also be used in the PMI subband. Compression is performed on the dimensions of the, thereby further reducing feedback overhead.
  • the enhanced TypeII codebook in Rel-15 supports configuring the size of the Channel Quality Indicator (CQI) subband, where the CQI subband is the subband used for channel quality calculation, and in Rel-15, it is assumed The PMI subband and the CQI subband have the same size. Therefore, in Rel-15, when determining the codebook, the number of PMI subbands can be directly determined according to the number of CQI subbands, and then based on the number of PMI subbands, precoding calculations are performed according to the PMI subbands, so as to determine the feedback to the transmission The codebook at the end.
  • CQI Channel Quality Indicator
  • the configuration parameters for the enhanced TypeII codebook in Rel-16 include the original parameter "CQI subband size" in Rel and the newly added parameter "division ratio R". Based on this, in Rel-16, when determining the codebook, the number of PMI subbands can be determined according to the number of CQI subbands and the division ratio R. In related technologies, it is generally believed that the number of PMI subbands can be determined by Come and get, among them, Is the number of CQI subbands.
  • the bandwidth of the CQI subband located at the boundary may be smaller than the configured CQI subband bandwidth.
  • Figure 3 shows a schematic diagram of the bandwidth after activating BWP according to an embodiment of the present disclosure.
  • the CQI subband located at the boundary may only include one PMI subband, as can be seen from the figure In this case, the number of PMI subbands is Are not equal.
  • the number of PMI subbands is used to determine the codebook, an accurate codebook determination result will not be obtained. Therefore, how to obtain a more accurate codebook determination result in the enhanced TypeII codebook has become an urgent problem to be solved.
  • this embodiment discloses an application example of the codebook determination method.
  • the codebook configuration information can be obtained from the codebook. Get the actual number of PMI subbands directly from the configuration information And then directly As a parameter in the precoding calculation, for this Precoding calculation is performed on each PMI subband to determine the codebook that is fed back to the sender.
  • the precoding calculation can be performed according to the true number of PMI subbands in the codebook determination process, so that the determined codebook has higher reliability, and then the accuracy of the subsequent sender during precoding is improved. .
  • the method can be applied to User Equipment (UE), where the UE can be a mobile phone, a tablet computer, a notebook computer, a handheld computer, or a mobile device.
  • UE User Equipment
  • Internet devices MID, mobile Internet device
  • wearable devices virtual reality (VR, virtual reality) devices
  • augmented reality (AR, augmented reality) devices wireless terminals in industrial control, wireless terminals in unmanned driving, remote surgery
  • the wireless terminal in the smart grid, the wireless terminal in the smart grid, the wireless terminal in the smart city, the wireless terminal in the smart home, the wireless terminal in the Internet of Vehicles, etc., are not specific in this embodiment Limitation.
  • the method may include:
  • Step S11 receiving codebook configuration information.
  • Step S12 Obtain the actual number of first subbands according to the codebook configuration information, where the first subband is used for precoding calculation.
  • Step S13 Perform precoding calculation according to the actual number of the first subbands to obtain a codebook.
  • the first subband is used to perform precoding calculations, and its definition is the same as the definition of the PMI subband mentioned in the foregoing disclosed embodiments. Therefore, in the subsequent disclosed embodiments, When it comes to the first subband, it can be regarded as a PMI subband. In the embodiment of the present disclosure, the actual number of the first subband can be recorded as
  • the received codebook configuration information may come from a device communicating with the UE.
  • the received codebook configuration information may be sent by the base station.
  • the codebook configuration information may contain configuration parameters related to CQI subbands, such as the size of CQI subbands, the division ratio of CQI subbands, and the number of CQI subbands after BWP is activated. And the position in frequency.
  • the PMI subband is collectively referred to as the first subband. Therefore, further, the CQI subband may be collectively referred to as the second subband. In summary, when the second subband is mentioned, it can be regarded as a CQI subband.
  • the number of second subbands can be recorded as
  • the codebook determination method and device of the disclosed embodiments of various aspects can determine the codebook according to the actual number of first subbands, and reduce the number of first subbands used in the process of determining the codebook through precoding calculation. Inconsistent with the actual number of first subbands, thereby improving the reliability of the codebook determination result, and then improving the accuracy of precoding.
  • step S11 is not limited in the embodiment of the present disclosure, that is, the manner of receiving the codebook configuration information is not limited. It has been proposed in the above-mentioned disclosed embodiment that the UE can receive the codebook configuration information from the base station. Therefore, the codebook configuration information is received. The mode of this configuration information can be flexibly determined according to the communication mode between the UE and the base station.
  • step S12 After receiving the codebook configuration information, step S12 can be used to obtain the actual number of the first subbands according to the codebook configuration information. How to obtain the actual number of the first subbands according to the codebook configuration information can be flexibly determined according to the specific content in the codebook configuration information.
  • step S12 may include:
  • Step S121 Obtain the number of second subbands, the division ratio of the second subbands, and the frequency domain position of each second subband according to the codebook configuration information.
  • Step S122 according to the division ratio of the second subband and the frequency domain position of each second subband, respectively determine the number of first subbands obtained by dividing each second subband.
  • Step S123 According to the number of first subbands obtained by dividing each second subband, the actual number of first subbands is obtained.
  • the number of first subbands can be obtained according to the product of the number of second subbands and the division ratio.
  • the second subband located at the boundary it may not be divided according to the division ratio.
  • the UE can determine the actual frequency domain division of each second subband through the number of second subbands, the division ratio of the second subbands, and the frequency domain position of each second subband. The number of the first subband is then counted to obtain the actual number of the first subband.
  • the actual number of first subbands can be effectively obtained from the existing codebook configuration information, and there is no need to add special parameter values for the number of first subbands in the codebook configuration information, making full use of the existing codebook configuration information.
  • the parameters of the codebook are determined, which improves the utilization efficiency of the existing parameters in the codebook determination process and saves communication resources.
  • step S13 can be used to obtain the codebook based on the actual number of the first subband. Specifically, how to perform the precoding calculation to obtain the codebook according to the actual number of the first subbands can be flexibly determined according to the actual situation. In a possible implementation manner, the actual number of the first subbands may be directly used to determine the codebook. Therefore, step S13 may include:
  • Step S131 Perform precoding calculation according to the first subband matching the actual number to obtain a codebook.
  • the codebook can be compressed in two dimensions, the antenna port and the PMI subband dimension. Therefore, in a possible implementation manner, when the codebook is compressed in the PMI subband dimension, the actual number of the first subband can be reduced As the vector length of the Discrete Fourier Transform (DFT) used in frequency domain compression, Perform precoding calculations on the first subbands to obtain a codebook.
  • DFT Discrete Fourier Transform
  • the specific precoding calculation process is not further limited in the embodiment of the present disclosure. Any process that can perform precoding calculation with the number of the first subband as a parameter to obtain the codebook can be used as the precoding calculation in the embodiment of the present disclosure.
  • the implementation method of, will not be described in detail here.
  • the actual number of first subbands obtained can be directly used to determine the code corresponding to the actual number of first subbands This improves the reliability of the codebook determination result and at the same time improves the efficiency of the codebook determination.
  • step S13 may also include:
  • Step S1321 Obtain the pre-configured number of the first subband according to the codebook configuration information.
  • Step S1322 When the actual number of first subbands is less than the preconfigured number, configure the virtual first subband according to the actual number of first subbands and the preconfigured number of first subbands.
  • Step S1323 Perform precoding calculation according to the first subband and the virtual first subband in combination with the pre-configured number to obtain a codebook.
  • virtual first subbands can also be configured according to the actual number of first subbands to fill in the difference between the actual number of first subbands and the pre-configured number .
  • the pre-configured number of the first subband can be recorded as In this way, after the virtual first subband is configured, the pre-configured number of the first subband can be changed As a parameter, to compare the total of the first subband and the virtual first subband Precoding calculation is performed on each subband to obtain a codebook.
  • step S1321 can be flexibly determined according to the information content specifically contained in the codebook configuration information, and is not limited to the following disclosed embodiments.
  • step S1321 may include:
  • Step S13211 Obtain the number of second subbands and the division ratio of the second subband according to the codebook configuration information, where the second subband is used for channel quality calculation, and the first subband is obtained by dividing the second subband.
  • Step S13212 The product of the number of second subbands and the division ratio of the second subband is used as the preconfigured number of first subbands.
  • the number of second subbands can be multiplied by the division ratio of the second subband to obtain the preconfigured number of first subbands, that is, In an example, the pre-configured number of the first subband can satisfy
  • the existing parameters of the second subband can be fully utilized to obtain the pre-configured number of the first subband, which further improves the utilization efficiency of the existing parameters in the codebook determination process and saves communication resources.
  • step S1322 can be based on the first sub-band.
  • the actual situation of the belt is determined flexibly and is not limited to the following disclosed embodiments.
  • step S1322 may include:
  • Step S13221 Determine the configured number of virtual first subbands according to the actual number of first subbands and the preconfigured number of first subbands.
  • Step S13222 Determine the configuration position of the virtual first subband according to the configuration quantity.
  • Step S13223 Determine the precoding coefficient of the virtual first subband.
  • Step S13224 Configure the virtual first subband according to the configuration position, the precoding coefficient and the configuration quantity.
  • the number, location and related parameters of the virtual subbands that should be configured can first be known.
  • the parameters may be precoding coefficients, where the precoding coefficients are the precoding calculation process.
  • the weighting coefficient of each spatial beam in each first subband used for frequency-domain DFT compression.
  • the number of virtual subbands can be configured at corresponding positions according to corresponding parameters. How to determine the configuration number, configuration position, and precoding coefficient of the virtual first subband can be flexibly selected according to actual conditions.
  • the configuration position of the virtual first subband can be determined according to the configuration number of the virtual first subband, but the precoding coefficient of the virtual first subband can be compared with the virtual first subband.
  • the configuration position or configuration number of the first subband is related, or may not be related to the configuration position and configuration number of the virtual first subband. Therefore, the execution order of steps S13221 to S13223 in step S1322 is not affected by the step number.
  • the limit can be flexibly determined according to the actual situation.
  • the configured virtual first subbands can have higher reliability, thereby improving the determination.
  • the reliability of the codebook which in turn improves the accuracy of precoding.
  • step S13221 may include: taking the difference between the pre-configured number of first subbands and the actual number of first subbands as the configured number of virtual first subbands.
  • the purpose of configuring the virtual first subband is to perform precoding calculations to determine the codebook according to the existing pre-configured number of first subbands. Therefore, the virtual first subband The first condition for configuration can be to make up for the gap between the pre-configured number of the first sub-band and the actual number, so the pre-configured number of the first sub-band can be changed And actual quantity The difference, as the configuration number of the virtual first subband
  • step S13222 may include:
  • Step S132221 when the number of configurations is one, in the boundary of the first subband, select a side including the independent first subband as the configuration position of the virtual first subband, where the independent first subband It is the only first subband obtained through the second subband segmentation.
  • step S132222 when the number of configurations is two, selection is made on both sides of the boundary of the first subband to obtain the configuration position of the virtual first subband.
  • the configuration position of the virtual first subband can be flexibly determined according to the number of configurations of the virtual first subband.
  • the virtual first subband is a supplementary addition to the existing first subband, in a possible implementation manner, it can be added at the boundary of the existing first subband, as shown in Figure 3
  • the existing first subband can form a subband set.
  • This subband set has two boundary positions, which can be used to add a virtual first subband.
  • These two boundary positions can be respectively referred to as the two sides of the boundary of the first subband.
  • the way on which side of the boundary of the first subband is configured for the one virtual first subband may be: selecting the side containing the independent first subband as the configuration position of the virtual first subband, where the independent The first subband may be the only first subband obtained by dividing the second subband.
  • the only first subband that is split can be called the independent first subband. band.
  • the boundary of the first subband of the virtual first subband configuration can include the side of the independent first subband to complete the virtual first subband configuration The location is determined.
  • the number of virtual first subbands is two, they can be uniformly configured on one side of the boundary of the first subband, or they can be respectively configured on both sides of the boundary of the first subband. See the following for details. The embodiments are disclosed and will not be expanded here.
  • the configured virtual first subband can have higher reliability, and then the reliability of the determined codebook can be improved And the accuracy of the precoding process.
  • step S132222 may include the following situations:
  • the configuration position of the virtual first subband can be flexibly determined, thereby improving the flexibility of the codebook determination process.
  • step S13223 may include:
  • the number and position of the virtual first subband may be directly determined without considering the number and location of the virtual first subband.
  • the precoding coefficient of the band is 0, that is, regardless of whether the virtual first subband is one or two, and is configured on the same side or both sides of the boundary of the first subband, the value of the precoding coefficient is 0.
  • the precoding coefficient of the virtual first subband can also be determined according to the position and quantity of the virtual first subband. For example, according to the position of the virtual first subband, the adjacent The precoding coefficient of the first subband is used as the precoding coefficient of the virtual first subband.
  • the boundary side where it is located may be adjacent to the first subband.
  • the precoding coefficient of the subband is used as the precoding coefficient of the virtual first subband.
  • the number of virtual first subbands is 2 and they are distributed on both sides of the boundary of the first subband, the two virtual first subbands can be used according to these two virtual first subbands.
  • the precoding coefficients of the first subbands adjacent to the subbands are used to determine the precoding coefficients of the two virtual first subbands respectively.
  • the precoding coefficient of the virtual first subband may be directly determined to be the average value of the precoding coefficients of the existing first subband, that is, Regardless of whether the virtual first subband is one or two, whether it is configured on the same side or both sides of the first subband boundary, the value of the precoding coefficient is the average value of the existing first subband precoding coefficient .
  • Determining the precoding coefficients of the virtual first subband through the foregoing various flexible conditions can further improve the flexibility of the virtual first subband configuration, thereby improving the flexibility of the codebook determination process.
  • step S1323 can perform precoding calculation according to the first subband and the virtual first subband in combination with the pre-configured number to obtain the codebook.
  • This process can be based on the pre-configured number of the first subband
  • the precoding calculation is performed according to the subband set jointly formed by the first subband and the virtual first subband to obtain the codebook.
  • the specific precoding calculation process refer to the above-mentioned comparison of the actual number of first subbands to the first subband The process of sub-band precoding calculation is not repeated here.
  • FIG. 5 shows a block diagram of a codebook determining device according to an embodiment of the present disclosure.
  • the device 20 includes:
  • the receiving module 21 is used to receive codebook configuration information.
  • the actual number determining module 22 is configured to obtain the actual number of the first subband according to the codebook configuration information, where the first subband is used for precoding calculation.
  • the codebook determining module 23 is configured to perform precoding calculations according to the actual number of the first subbands to obtain a codebook.
  • the codebook determination module is configured to perform precoding calculations according to the actual number of first subbands matching the actual number to obtain the codebook.
  • the codebook determining module includes: a pre-configured quantity obtaining unit, configured to obtain the pre-configured quantity of the first subband according to the codebook configuration information; and a virtual first subband configuration unit, configured to When the actual number of the first subband is less than the pre-configured number, configure the virtual first subband according to the actual number of the first subband and the preconfigured number of the first subband; the codebook determining unit is used to configure the virtual first subband according to the first subband And the virtual first subband, combined with the pre-configured number, perform precoding calculations to obtain a codebook.
  • the pre-configured quantity obtaining unit is used to obtain the quantity of the second subband and the division ratio of the second subband according to the codebook configuration information, where the second subband is used for channel quality
  • the first subband is obtained by dividing the second subband; the product of the number of the second subband and the division ratio of the second subband is used as the preconfigured number of the first subband.
  • the virtual first subband configuration unit is configured to: determine the configuration number of the virtual first subband according to the actual number of first subbands and the preconfigured number of first subbands; and according to the configuration number , Determine the configuration position of the virtual first subband; determine the precoding coefficient of the virtual first subband; configure the virtual first subband according to the configuration position, the precoding coefficient and the configuration quantity.
  • the virtual first subband configuration unit is further configured to: use the difference between the pre-configured number of first subbands and the actual number of first subbands as the configured number of virtual first subbands.
  • the virtual first subband configuration unit is further configured to: when the number of configurations is one, in the boundary of the first subband, select a side that includes the independent first subband, As the configuration position of the virtual first subband, the independent first subband is the only first subband obtained by dividing the second subband; when the number of configurations is two, at the boundary of the first subband Select from the two sides of the to obtain the configuration position of the virtual first subband.
  • the virtual first subband configuration unit is further configured to: select the side with a higher frequency among the two sides of the boundary of the first subband as the configuration position of the virtual first subband ; Or, on both sides of the boundary of the first subband, select the side with a lower frequency as the configuration position of the virtual first subband; or, use both sides of the boundary of the first subband as the virtual second The location of a sub-band.
  • the virtual first subband configuration unit is further configured to: determine the precoding coefficient of the virtual first subband to be zero; or, set the first subband adjacent to the virtual first subband to The precoding coefficient of is used as the precoding coefficient of the virtual first subband; or, the average value of the precoding coefficients of the first subband is used as the precoding coefficient of the virtual first subband.
  • the actual number determining module is used to obtain the number of second subbands, the division ratio of the second subbands, and the frequency domain position of each second subband according to the codebook configuration information;
  • the division ratio of the second subband and the frequency domain position of each second subband respectively determine the number of first subbands obtained by dividing each second subband; according to the first subband obtained by dividing each second subband The number of bands, get the actual number of the first sub-band.
  • Fig. 6 is a block diagram showing a device 1300 for determining a codebook according to an exemplary embodiment.
  • the device 1300 may be provided as a server.
  • the apparatus 1300 includes a processing component 1322, which further includes one or more processors, and a memory resource represented by a memory 1332 for storing instructions executable by the processing component 1322, such as application programs.
  • the application program stored in the memory 1332 may include one or more modules each corresponding to a set of instructions.
  • the processing component 1322 is configured to execute instructions to perform the above-mentioned method.
  • the device 1300 may also include a power supply component 1326 configured to perform power management of the device 1300, a wired or wireless network interface 1350 configured to connect the device 1300 to the network, and an input output (I/O) interface 1358.
  • the device 1300 can operate based on an operating system stored in the storage 1332, such as Windows ServerTM, Mac OS XTM, UnixTM, LinuxTM, FreeBSDTM or the like.
  • a non-volatile computer-readable storage medium such as the memory 1332 including computer program instructions, which can be executed by the processing component 1322 of the device 1300 to complete the foregoing method.
  • the present disclosure may be a system, method and/or computer program product.
  • the computer program product may include a computer-readable storage medium loaded with computer-readable program instructions for enabling a processor to implement various aspects of the present disclosure.
  • the computer-readable storage medium may be a tangible device that can hold and store instructions used by the instruction execution device.
  • the computer-readable storage medium may be, for example, but not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing.
  • Non-exhaustive list of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) Or flash memory), static random access memory (SRAM), portable compact disk read-only memory (CD-ROM), digital versatile disk (DVD), memory stick, floppy disk, mechanical encoding device, such as a printer with instructions stored thereon
  • RAM random access memory
  • ROM read-only memory
  • EPROM erasable programmable read-only memory
  • flash memory flash memory
  • SRAM static random access memory
  • CD-ROM compact disk read-only memory
  • DVD digital versatile disk
  • memory stick floppy disk
  • mechanical encoding device such as a printer with instructions stored thereon
  • the computer-readable storage medium used here is not interpreted as the instantaneous signal itself, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (for example, light pulses through fiber optic cables), or through wires Transmission of electrical signals.
  • the computer-readable program instructions described herein can be downloaded from a computer-readable storage medium to various computing/processing devices, or downloaded to an external computer or external storage device via a network, such as the Internet, a local area network, a wide area network, and/or a wireless network.
  • the network may include copper transmission cables, optical fiber transmission, wireless transmission, routers, firewalls, switches, gateway computers, and/or edge servers.
  • the network adapter card or network interface in each computing/processing device receives computer-readable program instructions from the network, and forwards the computer-readable program instructions for storage in the computer-readable storage medium in each computing/processing device .
  • the computer program instructions used to perform the operations of the present disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or in one or more programming languages.
  • Source code or object code written in any combination, the programming language includes object-oriented programming languages such as Smalltalk, C++, etc., and conventional procedural programming languages such as "C" language or similar programming languages.
  • Computer-readable program instructions can be executed entirely on the user's computer, partly on the user's computer, executed as a stand-alone software package, partly on the user's computer and partly executed on a remote computer, or entirely on the remote computer or server carried out.
  • the remote computer can be connected to the user's computer through any kind of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (for example, using an Internet service provider to access the Internet). connection).
  • LAN local area network
  • WAN wide area network
  • an electronic circuit such as a programmable logic circuit, a field programmable gate array (FPGA), or a programmable logic array (PLA), can be customized by using the status information of the computer-readable program instructions.
  • the computer-readable program instructions are executed to realize various aspects of the present disclosure.
  • These computer-readable program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, thereby producing a machine that makes these instructions when executed by the processor of the computer or other programmable data processing device , A device that implements the functions/actions specified in one or more blocks in the flowcharts and/or block diagrams is produced. It is also possible to store these computer-readable program instructions in a computer-readable storage medium. These instructions make computers, programmable data processing apparatuses, and/or other devices work in a specific manner. Thus, the computer-readable medium storing the instructions includes An article of manufacture, which includes instructions for implementing various aspects of the functions/actions specified in one or more blocks in the flowcharts and/or block diagrams.
  • each block in the flowchart or block diagram may represent a module, program segment, or part of an instruction, and the module, program segment, or part of an instruction contains one or more components for realizing the specified logical function.
  • Executable instructions may also occur in a different order than the order marked in the drawings. For example, two consecutive blocks can actually be executed substantially in parallel, or they can sometimes be executed in the reverse order, depending on the functions involved.
  • each block in the block diagram and/or flowchart, and the combination of the blocks in the block diagram and/or flowchart can be implemented by a dedicated hardware-based system that performs the specified functions or actions Or it can be realized by a combination of dedicated hardware and computer instructions.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

La présente invention concerne un procédé et un dispositif de détermination de livre de codes. Le procédé de détermination de livre de codes comprend les étapes suivantes : recevoir des informations de configuration de livre de codes ; obtenir le nombre réel de premières sous-bandes selon les informations de configuration de livre de codes, les premières sous-bandes étant utilisées pour effectuer un calcul de précodage ; et effectuer un calcul de précodage selon le nombre réel des premières sous-bandes pour obtenir un livre de codes. En recevant les informations de configuration de livre de codes, puis en obtenant, selon les informations de configuration de livre de codes, le nombre réel des premières sous-bandes utilisées pour effectuer un calcul de précodage, ce qui effectue un calcul de précodage selon le nombre réel des premières sous-bandes pour obtenir le livre de codes, le livre de codes peut être déterminé selon le nombre réel des premières sous-bandes, et le risque de la situation dans laquelle le nombre de premières sous-bandes utilisées est incohérent avec le nombre réel des premières sous-bandes dans un processus de détermination du livre de codes au moyen d'un calcul de précodage est réduit, ce qui améliore fiabilité d'un résultat de détermination de livre de codes, et améliore davantage la précision de précodage.
PCT/CN2020/113792 2019-11-08 2020-09-07 Procédé et dispositif de détermination de livre de codes WO2021088501A1 (fr)

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