WO2023016522A1 - Procédé de communication et appareil de communication - Google Patents

Procédé de communication et appareil de communication Download PDF

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Publication number
WO2023016522A1
WO2023016522A1 PCT/CN2022/111833 CN2022111833W WO2023016522A1 WO 2023016522 A1 WO2023016522 A1 WO 2023016522A1 CN 2022111833 W CN2022111833 W CN 2022111833W WO 2023016522 A1 WO2023016522 A1 WO 2023016522A1
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WIPO (PCT)
Prior art keywords
cqi
sinr
interference
interference factor
factor
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PCT/CN2022/111833
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English (en)
Chinese (zh)
Inventor
高翔
刘鹍鹏
董昶钊
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华为技术有限公司
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Publication of WO2023016522A1 publication Critical patent/WO2023016522A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/345—Interference values
    • 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
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information

Definitions

  • the present application relates to the communication field, and more specifically, to a communication method and a communication device.
  • MIMO Multiple-input multiple-output
  • LTE long term evolution
  • 5th generation, 5G fifth generation
  • CQI channel quality indication
  • Embodiments of the present application provide a communication method and a communication device, with a view to accurately estimating downlink quality and improving system performance.
  • the present application provides a communication method, which can be performed by a network device, or can also be performed by a component (such as a chip, a chip system, etc.) configured in the network device, or can also be performed by a Logic modules or software implementations that realize all or part of the network device functions are not limited in this application.
  • the method includes: receiving indication information from a first UE, where the indication information is used to indicate an interference factor, receiving a CQI from the first UE, and determining downlink quality according to the interference factor and the CQI.
  • the first UE may be any UE within the coverage of the network device.
  • the CQI from the first UE may be the CQI obtained by the first UE based on downlink reference signal measurement, or the CQI obtained by the first UE based on downlink data channel measurement.
  • the downlink reference signal may be a reference signal used for downlink channel measurement.
  • the downlink reference signal may include, but not limited to, channel state information-reference signal (channel state information-reference signal, CSI-RS), demodulation reference signal (demodulation reference signal, DMRS), channel sounding reference signal (sounding reference signal) , SRS), synchronization signal and physical broadcast channel block (synchronization signal and physical broadcast channel block, SSB), etc.
  • the interference factor can be understood as the quantification of possible factors that may affect downlink quality.
  • the interference factor may be associated with a measurement value of the intensity of the interference received by the first UE, where the received interference may be inter-user interference caused by a paired user, or inter-stream interference caused by other data streams, It may also be inter-cell interference caused by neighboring cells.
  • the interference factor may also be a scaling factor or weighting factor of the strength of the received interference, or be associated with the scaling factor or weighting factor of the strength of the received interference, and is used to represent the ratio of the interference power to the reference power value, wherein,
  • the reference power value may correspond to a power value under a preset power algorithm.
  • the interference factor can also be associated with the decibel (decibel, dB) value of the received interference compared to the reference power value, indicating the dB value corresponding to the ratio of the interference power to the reference power value, or indicating the interference power compared to the reference power value.
  • dB decibel
  • the network device determines the downlink quality, it comprehensively considers possible factors that may affect the downlink quality, such as the interference received by the first UE, the signal and interference processing capability of the first UE, The downlink quality is determined in combination with the CQI, so that the downlink quality can be determined more accurately, and the MIMO transmission rate is improved by using the MIMO channel characteristics and the signal and interference processing capability of the first UE.
  • the signal and interference processing capability of the first UE may be related to the capability of a receiver corresponding to the first UE.
  • the indication information is an index of an interference factor
  • the index of the interference factor is determined from a predefined mapping relationship between multiple interference factors and multiple indices.
  • the index of the interference factor corresponds to the interference factor.
  • the predefined mapping relationship between the two can be pre-stored on the network device and the UE side respectively.
  • the network device can determine the interference factor based on the reported index, and then estimate the downlink based on the interference factor. quality so that it more closely matches the actual downlink quality.
  • the indication information is the receiver type of the first UE, and the receiver type is used to determine the interference factor.
  • the receiver type of the first UE may be indicated by, for example, an identifier of the receiver type, or may be further identified by an index corresponding to the receiver type of the first UE according to a pre-stored mapping relationship between multiple receiver types and multiple indexes. Indication, this application does not limit the specific indication method of the receiver type.
  • the interference factor is associated with a receiver type.
  • the ability to suppress multi-user interference is different for different types of receivers. Therefore, the interference factor can be determined according to the type of receiver, and then the downlink quality can be determined. The ability to suppress multi-user interference of different types of receivers is introduced. Considering it is beneficial to obtain more accurate downlink quality.
  • the downlink quality includes downlink quality corresponding to MU-MIMO transmission; and determining the downlink quality according to the interference factor and CQI includes: according to MU One or more of the total number of streams paired, the number of streams of the first UE, and the interference factor determine the downlink quality corresponding to the MU-MIMO transmission.
  • the network device can determine the downlink quality corresponding to MU-MIMO transmission based on one or more of the above parameters, and provides various possible implementation methods. For example, it can be based on the total number of MU paired flows, the first The downlink quality can be determined based on the number of streams and interference factors of a UE; for another example, when the number of streams of the first UE is 1, the downlink quality can be determined based on the total number of streams and interference factors of MU pairing, by considering multiple This influence factor makes the estimated downlink quality closer to the actual downlink quality and improves the system performance.
  • the downlink quality corresponding to MU-MIMO transmission includes MU-signal to interference plus noise ratio (signal to interference plus noise ratio, SINR).
  • SINR signal to interference plus noise ratio
  • the downlink quality includes relevant parameters that reflect the downlink quality.
  • the downlink quality includes MU-SINR, or other relevant parameters that reflect the downlink quality, such as modulation coding scheme (modulation coding scheme , MCS), and the quantification results of SINR.
  • the MU-SINR is the ratio of the limited signal power at the receiving end to the sum of interference power and noise power when the transmission mode is MU-MIMO.
  • the interference power may include one or more of interference from MU paired users, inter-cell interference caused by neighboring cells, and inter-stream interference caused by other data streams corresponding to the first UE.
  • MU-SINR satisfies: or Among them, ⁇ represents the normalization factor of the MU precoding matrix, SINR SU represents the single-user SU-SINR, SINR MU represents the MU-SINR; K represents the total flow number of MU pairing, R represents the flow number of the first UE, and ⁇ represents Interference factor, ⁇ >1, 0 ⁇ 1, K>R ⁇ 1, K and R are integers.
  • the SU-SINR corresponds to the received CQI from the first UE, that is, the SU-SINR is the SINR corresponding to the CQI reported by the first UE.
  • CQI may be a quantization result of SU-SINR.
  • the MU-SINR can be calculated by any of the above formulas.
  • One method is that the network device can obtain the normalization factor of the precoding matrix by obtaining the MU precoding matrix, and further according to the normalization factor, the first The number of UE streams, the total number of streams paired with MUs and the interference factor determine the MU-SINR, and the influence of the MU precoding matrix and interference factors on the MU-SINR is comprehensively considered to improve the transmission efficiency of MIMO.
  • Another method is that the network device determines the MU-SINR based on the interference factor, the number of streams of the first UE, and the total number of streams of the MU pair.
  • the influence of the interference factor on the MU-SINR is considered.
  • the calculation process is relatively simple, and to a certain extent Improved system performance.
  • the present application provides a communication method, and the method may be executed by a first UE, or may also be executed by a component (such as a chip, a chip system, etc.) configured in the first UE, or may also be It may be realized by a logic module or software capable of realizing all or part of the functions of the first UE, which is not limited in this application.
  • a component such as a chip, a chip system, etc.
  • the first UE may be any UE within the coverage of the network device.
  • the method includes: sending indication information, where the indication information is used to indicate the interference factor of the first UE; sending the CQI of the first UE, where the CQI and the interference factor are used to determine downlink quality.
  • the CQI may be the CQI obtained by the first UE based on the measurement of the downlink reference signal, or the CQI obtained by the first UE based on the measurement of the downlink data channel.
  • the downlink reference signal may be a reference signal used for downlink channel measurement.
  • the downlink reference signal may include, but not limited to, CSI-RS, DMRS, SRS, SSB, etc., for example.
  • the interference factor may be associated with a measurement value of the intensity of interference received by the first UE, where the received interference may be inter-user interference caused by paired users, or inter-flow interference caused by other data streams. Interference can also be inter-cell interference caused by neighboring cells.
  • the interference factor may also be a scaling factor or weighting factor of the strength of the received interference, or be associated with the scaling factor or weighting factor of the strength of the received interference, and is used to represent the ratio of the interference power to the reference power value, wherein, The reference power value may correspond to a power value under a preset power algorithm.
  • the interference factor can also be associated with the intensity of the interference received compared to the dB value of the reference power, indicating the dB value corresponding to the ratio of the interference power to the reference power value, or indicating the dB difference between the interference power and the reference power value value.
  • the first UE sends indication information to the network equipment, the indication information indicates factors that may affect the downlink quality, so that the network equipment can estimate the downlink quality more accurately, using the MIMO channel Features, improve MIMO transmission efficiency.
  • the signal and interference processing capability of the first UE may be related to the capability of a receiver corresponding to the first UE.
  • a possible design is that the above indication information is an index of the interference factor, and the index of the interference factor is determined from the predefined mapping relationship between multiple interference factors and multiple indices.
  • the index of the interference factor corresponds to the interference factor, and the predefined mapping relationship between the two can be pre-stored on the network device and the UE side respectively, and the first UE reports the index of the interference factor to the network device, so that the network device can determine the interference factor , so as to estimate the downlink quality according to the interference factor, so that it can better match the actual downlink quality.
  • the above indication information is the receiver type of the first UE, and the receiver type is used to determine the interference factor.
  • the receiver type of the first UE may be indicated by, for example, an identifier of the receiver type, or may be further identified by an index corresponding to the receiver type of the first UE according to a pre-stored mapping relationship between multiple receiver types and multiple indexes. Indication, this application does not limit the specific indication method of the receiver type.
  • the interference factor is associated with a receiver type.
  • the ability to suppress multi-user interference is different for different types of receivers. Therefore, the interference factor can be determined according to the type of receiver, and then the downlink quality can be determined. The ability to suppress multi-user interference of different types of receivers is introduced. Considering it is beneficial to obtain more accurate downlink quality.
  • the downlink quality includes MU-SINR corresponding to MU-MIMO transmission.
  • the downlink quality includes relevant parameters that reflect the downlink quality.
  • This application provides that the downlink quality includes MU-SINR, and it can also be other relevant parameters that reflect the downlink quality, such as MCS, or quantization of SINR result.
  • MU-SINR is the ratio of the limited signal power at the receiving end to the sum of interference power and noise power when the transmission mode is MU-MIMO.
  • the interference power may include one or more of interference from MU paired users, inter-cell interference caused by neighboring cells, and inter-stream interference caused by other data streams corresponding to the first UE.
  • MU-SINR satisfies: or Among them, ⁇ represents the normalization factor of the MU precoding matrix, SINR SU represents the single-user SU-SINR, SINR MU represents the MU-SINR; K represents the total flow number of MU pairing, R represents the flow number of the first UE, and ⁇ represents Interference factor, ⁇ >1, 0 ⁇ 1, K>R ⁇ 1, K and R are integers.
  • the SU-SINR corresponds to the CQI of the first UE, that is, the SINR corresponding to the CQI reported by the first UE.
  • CQI may be a quantization result of SU-SINR.
  • the MU-SINR can be calculated by any one of the above two formulas for calculating the MU-SINR, and multiple possible implementation modes are provided.
  • the first formula comprehensively considers the impact of MU precoding matrix and interference factors on MU-SINR
  • the second formula considers the impact of interference factors on MU-SINR.
  • the calculation process is relatively simple.
  • Both methods take into account the factors that may affect the MU-SINR of the downlink, which improves the transmission efficiency of MIMO.
  • the present application provides a communication method, and the method may be executed by a first UE, or may also be executed by a component (such as a chip, a chip system, etc.) configured in the first UE, or may also It may be realized by a logic module or software capable of realizing all or part of the functions of the first UE, which is not limited in this application.
  • a component such as a chip, a chip system, etc.
  • the method includes: determining the first CQI according to channel state information-reference signal (channel state information-reference signal, CSI-RS); sending the first CQI; according to the received physical downlink shared channel (physical downlink shared channel , PDSCH), determine first information, where the first information is associated with the first CQI; and send the first information.
  • channel state information-reference signal channel state information-reference signal, CSI-RS
  • PDSCH physical downlink shared channel
  • the first UE may also determine the first information according to the DMRS, where the DMRS is associated with the PDSCH.
  • the first UE can determine the first information according to the PDSCH, and obtain the first CQI based on the downlink reference signal measurement, and associate the first information with the first CQI, which can facilitate the network equipment based on the latest channel state, Quickly adjust the CQI to adapt to the current channel conditions and increase the transmission rate of MIMO.
  • the first CQI may be transmitted through a physical uplink shared channel (physical uplink share channel, PUSCH) or a physical uplink control channel (physical uplink control channel, PUCCH).
  • the first CQI may be associated with one or more reference signal resources (eg, CSI-RS resources), and the one or more reference signal resources may be configured by the network device for the first UE.
  • the first CQI may also be associated with one or more CSI reports (reports), and the one or more CSI reports may be configured by the network device to the first UE.
  • the first information indicates the adjustment amount of the CQI.
  • the network device can adjust the first CQI in time based on the CQI adjustment amount, so as to quickly converge to the actual downlink CQI, which is conducive to improving the MIMO transmission rate.
  • the second CQI is determined according to the DMRS, where the DMRS is associated with the PDSCH.
  • the first CQI is the last reported CQI.
  • the last reported CQI may refer to the CQI carried in the last reported CSI.
  • the last reported CSI is associated with one or more CSI reports. It should be understood that the reported content in the CSI report includes CSI. CQI is included in CSI. Therefore, the last reported CSI is associated with one or more CSI reports, and it can also be understood that the last reported CSI is carried in one or more CSI reports. For the sake of brevity, descriptions of the same or similar cases are omitted below.
  • the last reported CSI may be the last reported CSI before the sending moment of the first information; it may also be the last reported CSI before the start position of the time unit where the first information is sent.
  • the last reported CSI may also be the last reported CSI before the PDSCH reception time used to determine the second CQI.
  • the PDSCH receiving moment corresponding to the second CQI may correspond to one time unit.
  • the first CQI is the CQI carried in the CSI reported at a preset time, or the CQI carried in the CSI reported within a preset time period.
  • the CSI reported at a preset time, or the CSI reported within a preset time period is associated with one or more CSI reports.
  • the CSI reported at the preset time, or the CSI reported within the preset time period may be the last reported CSI before k (k is a positive integer) time units before the sending time of the first information;
  • k may be an integer multiple of 2 (such as 2, 4, 8, etc.).
  • the CSI reported at the preset time, or the CSI reported within the preset time period may be the last report between k (k is a positive integer) time units before the sending time of the first information and the sending time of the first information It may also be the last reported CSI between k time units before the starting position of the time unit at which the first information is sent and the first information is sent.
  • k may be an integer multiple of 2 (such as 2, 4, 8, etc.).
  • the CSI reported at the preset time, or the CSI reported within the preset time period may be the last time k (k is a positive integer) time units before the time unit used to determine the PDSCH receiving time corresponding to the second CQI
  • the reported CSI may also be the last reported CSI k time units before the start position of the time unit used to determine the receiving moment of the PDSCH corresponding to the second CQI.
  • k may be an integer multiple of 2 (such as 2, 4, 8, etc.).
  • the first CQI is the CQI carried in the preset CSI.
  • Preset CSI can be associated with one or more CSI reports.
  • the network device indicates to the first UE the CSI or CSI report associated with the calculation of the first CQI by using the indication information.
  • the first CQI may also be the CQI carried in other CSI reports. It may be the CQI sent before the first information, or the CQI sent after the first information.
  • the network devices can all adjust based on the first information.
  • the first information is carried in a hybrid automatic repeat request (hybrid automatic repeat request, HARQ) message.
  • HARQ hybrid automatic repeat request
  • the first information is reported through the HARQ message, that is, the first information can be sent to the network device at the same time as the feedback message for the PDSCH is sent, so the first information can be quickly reported to the network device without waiting for the next CSI feedback , so as to adjust the CQI in time.
  • the present application provides a communication method, which may be performed by a network device, or may also be performed by a component (such as a chip, a chip system, etc.) configured in the network device, or may also be performed by a capable Logic modules or software implementations that realize all or part of the network device functions are not limited in this application.
  • the method includes: receiving a first CQI, the first CQI is determined according to the CSI-RS; receiving first information from the first UE, the first information is associated with the first CQI; according to the first information, determining downlink quality.
  • the network device can determine the downlink quality based on the first information, the first information is associated with the first CQI, and the first CQI can be the CQI obtained based on downlink reference signal measurement, so that the network device can use the The latest channel status can quickly adjust the CQI to adapt to the current channel conditions and increase the MIMO transmission rate.
  • the first CQI can be transmitted through PUSCH or PUCCH.
  • the first CQI may be associated with one or more reference signal resources (such as CSI-RS resources), and the one or more reference signal resources may be configured by the network device for the first UE.
  • the first CQI may also be associated with one or more CSI reports, and the one or more CSI reports may be configured by the network device for the first UE.
  • downlink quality includes SINR.
  • the downlink quality includes relevant parameters that reflect the downlink quality.
  • This application provides that the downlink quality includes SINR, or other relevant parameters that reflect the downlink quality, such as MCS.
  • the first information indicates the adjustment amount of the CQI
  • determining the downlink quality includes: determining the second CQI according to the adjustment amount of the CQI and the first CQI, and the second CQI is the SINR determined according to the PDSCH For the corresponding CQI, the downlink quality is determined according to the second CQI.
  • the network device determines the second CQI based on the first CQI and the adjustment amount of the CQI, so as to adjust the first CQI, and determine the downlink quality according to the latest channel state, so as to realize the rapid adjustment of the CQI to adapt to the current channel condition , to increase the MIMO transmission rate.
  • the indication information may also indicate the second CQI.
  • the network device directly receives the second CQI from the first UE, where the second CQI is the CQI corresponding to the SINR determined based on the PDSCH.
  • the first UE does not need to calculate the CQI adjustment amount.
  • After determining the second CQI according to the PDSCH it reports it to the network device, so that the network device can update the first CQI based on the latest channel state, adapt to the current channel state, and improve MIMO transmission. rate.
  • the adjustment amount of the CQI is the difference between the second CQI and the first CQI, and a specific calculation formula for calculating the second CQI is given.
  • the first CQI is the last reported CQI.
  • the last reported CQI may refer to the CQI carried in the last reported CSI.
  • the last reported CSI is associated with one or more CSI reports.
  • the last reported CSI may be the last reported CSI before the sending moment of the first information; it may also be the last reported CSI before the start position of the time unit where the first information is sent.
  • the last reported CSI may also be the last reported CSI before the PDSCH reception time used to determine the second CQI.
  • the PDSCH receiving moment corresponding to the second CQI may correspond to one time unit.
  • the first CQI is the CQI carried in the CSI reported at a preset time, or the CQI carried in the CSI reported within a preset time period.
  • the CSI reported at a preset time, or the CSI reported within a preset time period is associated with one or more CSI reports.
  • the CSI reported at the preset time, or the CSI reported within the preset time period may be the last reported CSI before k (k is a positive integer) time units before the sending time of the first information;
  • k may be an integer multiple of 2 (such as 2, 4, 8, etc.).
  • the CSI reported at the preset time, or the CSI reported within the preset time period may be the last report between k (k is a positive integer) time units before the sending time of the first information and the sending time of the first information It may also be the last reported CSI between k time units before the starting position of the time unit at which the first information is sent and the first information is sent.
  • k may be an integer multiple of 2 (such as 2, 4, 8, etc.).
  • the CSI reported at the preset time, or the CSI reported within the preset time period may be the last time k (k is a positive integer) time units before the time unit used to determine the PDSCH receiving time corresponding to the second CQI
  • the reported CSI may also be the last reported CSI k time units before the start position of the time unit used to determine the receiving moment of the PDSCH corresponding to the second CQI.
  • k may be an integer multiple of 2 (such as 2, 4, 8, etc.).
  • the first CQI is the CQI carried in the preset CSI.
  • Preset CSI can be associated with one or more CSI reports.
  • the network device indicates to the first UE the CSI or CSI report associated with the calculation of the first CQI by using the indication information.
  • the first CQI may also be the CQI carried in other CSI reports. It may be the CQI sent before the first information, or the CQI sent after the first information, and the network device may adjust both based on the first information.
  • the downlink quality includes downlink SINR, and the downlink SINR and the second CQI satisfy:
  • SINR DL is the SINR of the downlink
  • ⁇ OLLA is the adjustment amount of outer loop link adaptation (OLLA)
  • CQI 2 represents the second CQI
  • ⁇ OLLA is determined based on the HARQ message.
  • the network device estimates the SINR corresponding to the downlink based on the second CQI and the OLLA adjustment amount, and adjusts the CQI in time without waiting for the next CSI feedback, so that the SINR quickly converges to the actual downlink SINR.
  • the first information is carried in a HARQ message.
  • the first information is reported through the HARQ message, that is, the network device can also receive the first information while receiving the feedback message for the PDSCH, and the network device can quickly receive the first information without waiting for the next CSI feedback, so that Make timely adjustments to the CQI.
  • the time unit is a time slot, or an orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbol.
  • the present application provides a communications device that can implement the method in any possible implementation manner of the first aspect to the fourth aspect and the first aspect to the fourth aspect.
  • the apparatus includes corresponding units or modules for performing the above method.
  • the units or modules included in the device can be realized by software and/or hardware.
  • the apparatus may be, for example, the first UE or network equipment, or may be a chip, a chip system, or a processor that supports the first UE or network equipment to implement the above method, or may be all or all of the first UE or network equipment.
  • Logical modules or software with partial functionality are examples of the first UE or network equipment.
  • the present application provides a communication device, where the communication device includes a processor.
  • the processor is coupled with the memory, and can be used to execute the computer program in the memory, so as to realize the communication method in the first aspect to the fourth aspect and any possible implementation manner of the first aspect to the fourth aspect.
  • the communication device further includes a memory.
  • the communication device further includes a communication interface, and the processor is coupled to the communication interface.
  • the present application provides a system-on-a-chip, which includes at least one processor, configured to support the implementation of the above-mentioned first to fourth aspects and any possible implementation manners of the first to fourth aspects.
  • the functions involved for example, receiving or processing the data and/or information involved in the methods described above.
  • the chip system further includes a memory, the memory is used to store program instructions and data, and the memory is located inside or outside the processor.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the present application provides a communication system, including the aforementioned network device and the first UE.
  • the present application provides a computer-readable storage medium, where a computer program (also referred to as code, or instruction) is stored on the computer storage medium, and when the computer program is run by a processor, the The method in any possible implementation manner of the above first aspect to the fourth aspect and any one of the first aspect to the fourth aspect is executed.
  • a computer program also referred to as code, or instruction
  • the present application provides a computer program product, the computer program product including: a computer program (also referred to as code, or instruction), when the computer program is executed, the above-mentioned first to the first aspect
  • a computer program also referred to as code, or instruction
  • the method in the fourth aspect and any possible implementation manner of the first aspect to the fourth aspect is executed.
  • FIG. 1 is a schematic diagram of a communication system applicable to the method provided by the embodiment of the present application
  • FIG. 2 is a schematic flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of the distribution of MU-SINR estimation results under different SU-SINRs provided by the embodiment of the present application;
  • FIG. 4 is a schematic diagram of the estimated SINR adjusted by OLLA and the actual downlink SINR corresponding to different TTIs provided by the embodiment of the present application;
  • FIG. 5 is another schematic flowchart of a communication method provided by an embodiment of the present application.
  • Fig. 6 is a schematic diagram of reporting the first information provided by the embodiment of the present application.
  • FIG. 7 is a schematic diagram of the estimated SINR adjusted by different adjustment methods and the actual downlink SINR provided by the embodiment of the present application;
  • FIG. 8 is a schematic block diagram of a communication device provided by an embodiment of the present application.
  • Fig. 9 is another schematic block diagram of a communication device provided by an embodiment of the present application.
  • LTE system LTE frequency division duplex (frequency division duplex, FDD) system
  • LTE time division duplex time division duplex, TDD
  • universal mobile communication system universal mobile telecommunications system (UMTS)
  • WiMAX worldwide interoperability for microwave access
  • 5G mobile communication system may include non-standalone networking (non-standalone, NSA) and/or standalone networking (standalone, SA).
  • the technical solution provided by this application can also be applied to future communication systems, such as the sixth generation (6th Generation, 6G) mobile communication system and the like. This application is not limited to this.
  • the network device may be any device with a wireless transceiver function.
  • the equipment includes but is not limited to: evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), Node B (Node B, NB), base station controller (base station controller, BSC) , base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), baseband unit (baseband unit, BBU), wireless fidelity (wireless fidelity, Wi-Fi) system
  • the access point (access point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or sending and receiving point (transmission and reception point, TRP), etc. can also be 5G, such as , a gNB in the NR system, or, a transmission point (TRP or TP), one or a group (including multiple antenna panels) antenna panels of a base station in
  • a gNB may include a centralized unit (CU) and a DU.
  • the gNB may also include an active antenna unit (AAU).
  • CU implements some functions of gNB
  • DU implements some functions of gNB.
  • CU is responsible for processing non-real-time protocols and services, implementing radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer function.
  • the DU is responsible for processing physical layer protocols and real-time services, realizing the functions of the radio link control (radio link control, RLC) layer, medium access control (medium access control, MAC) layer and physical (physical, PHY) layer.
  • the AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU , or, sent by DU and AAU.
  • the network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into network devices in an access network (radio access network, RAN), and the CU can also be divided into network devices in a core network (core network, CN), which is not limited in this application.
  • the network device provides services for the cell, and the terminal device communicates with the cell through the transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the network device.
  • the cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.) , can also belong to the base station corresponding to a small cell, where the small cell can include: a metro cell, a micro cell, a pico cell, a femto cell, etc. , these small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • UE may also be referred to as a terminal device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent or user device.
  • UE and terminal equipment may be used interchangeably in the following, and the meanings expressed by the two are the same.
  • the UE may be a device that provides voice/data connectivity to users, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and the like.
  • some examples of UE can be: mobile phone (mobile phone), tablet computer (pad), computer with wireless transceiver function (such as notebook computer, palmtop computer, etc.), mobile internet device (mobile internet device, MID), virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control (industrial control), wireless terminals in self driving (self driving), wireless in remote medical (remote medical) Terminals, wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, cellular phones, cordless Telephones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), handheld devices with wireless communication capabilities, computing devices, or connected Other processing devices to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in the 5G network or
  • wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories.
  • Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.
  • the terminal device may also be a terminal device in an Internet of Things (internet of things, IoT) system.
  • IoT Internet of Things
  • Its main technical feature is to connect objects to the network through communication technology, so as to realize the intelligent network of human-machine interconnection and object interconnection.
  • IoT technology can achieve massive connections, deep coverage, and terminal power saving through, for example, narrow band (NB) technology.
  • NB narrow band
  • terminal equipment can also include sensors such as smart printers, train detectors, and gas stations.
  • the main functions include collecting data (partial terminal equipment), receiving control information and downlink data from network equipment, and sending electromagnetic waves to transmit uplink data to network equipment. .
  • words such as “first” and “second” are used to distinguish the same or similar items with basically the same function and effect .
  • the first CQI and the second CQI are for distinguishing CQIs with different values, and their sequence is not limited.
  • words such as “first” and “second” do not limit the number and execution order, and words such as “first” and “second” do not necessarily limit the difference.
  • SINR refers to the ratio of the strength of the received useful signal to the strength of the received interference signal. Or the ratio of the signal power of the received useful signal to the sum of the power of the received interference signal and the noise power.
  • CQI can indicate channel quality, and can be associated with SINR or MCS.
  • the network device selects an appropriate scheduling method according to the CQI information, adapts the modulation coding scheme (MCS) of the channel and the corresponding downlink data block size, so as to ensure that the UE obtains the best performance in different wireless environments.
  • MCS modulation coding scheme
  • subband CQI wideband CQI+subband differential CQI.
  • Table 1 shows a possible correspondence between different values of the wideband CQI and modulation schemes, coding rates, and transmission efficiencies.
  • Table 1 different values of CQI may correspond to different modulation schemes, coding rates and transmission efficiencies.
  • Table 1 exemplarily lists four modulation modes of "QPSK”, “16QAM”, “64QAM” and “256QAM”, and the highest modulation order is “256QAM”.
  • QPSK means quadrature phase shift keying (quadrature phase shift keying, QPSK)
  • QAM quadrature amplitude modulation (quadrature amplitude modulation, QAM).
  • the first column in Table 1 is the CQI index, which contains values 0, 1, ..., 15, representing 16 situations, which can be indicated by using 4 bits.
  • the second column is the modulation method
  • the third column is the coding rate
  • the fourth column is the transmission efficiency calculated according to the modulation method and coding rate.
  • the CQI is shown as a CQI index in Table 1, and the CQI may also be indicated in other ways, for example, the CQI may also refer to a modulation mode+coding rate. Therefore, the CQI may be indicated by a preset index, or may correspond to a preset index, which is not limited in this embodiment of the present application.
  • each CQI corresponds to a receiving end SINR.
  • a CQI value may represent a receiving end SINR value.
  • each CQI corresponds to a SNR for a given error probability (eg, BER or BLER) threshold.
  • a CQI value may represent a SNR value.
  • SINR the SINR at the receiving end
  • SINR the meanings expressed by the two are the same.
  • MCS takes the factors that affect the communication rate concerned as the columns of the table, and takes the MCS index as the rows to form a rate table.
  • Each MCS index may correspond to a physical transmission rate under a set of parameters.
  • Table 2 shows a possible correspondence between different indexes of the MCS and modulation order, target code rate and spectrum efficiency. It should be understood that Table 2 is only an example of the correspondence between different indexes of the MCS and the modulation order, target code rate, and spectrum efficiency, and there may be other correspondences, for which reference may be made to existing protocols.
  • FIG. 1 shows a schematic diagram of a communication system 100 applicable to the method provided by the embodiment of the present application.
  • the communication system 100 may include at least one network device, such as the network device 101 shown in Figure 1; the communication system 100 may also include at least one terminal device, such as the terminal devices 102 to 107 shown in Figure 1 .
  • the terminal equipment 102 to the terminal equipment 107 may be mobile or fixed.
  • the network device 101 and one or more of the terminal device 102 to the terminal device 107 may communicate through a wireless link.
  • Each network device can provide communication coverage for a specific geographical area, and can communicate with terminal devices located in the coverage area.
  • terminal devices can communicate directly with each other.
  • a device to device (device to device, D2D) technology may be used to realize direct communication between terminal devices.
  • the terminal device 105 and the terminal device 106, and between the terminal device 105 and the terminal device 107 may use the D2D technology to communicate directly.
  • Terminal device 106 and terminal device 107 may communicate with terminal device 105 individually or simultaneously.
  • the terminal device 105 to the terminal device 107 can also communicate with the network device 101 respectively. For example, it can directly communicate with the network device 101, as shown in the figure, the terminal devices 105 and 106 can directly communicate with the network device 101; it can also communicate with the network device 101 indirectly, as shown in the figure, the terminal device 107 communicates with the network device via the terminal device 106 101 communications.
  • FIG. 1 exemplarily shows a network device, multiple terminal devices, and communication links between communication devices.
  • the communication system 100 may include multiple network devices, and the coverage of each network device may include other numbers of terminal devices, for example, more or fewer terminal devices. This application does not limit this.
  • Each of the aforementioned communication devices may be configured with multiple antennas.
  • the plurality of antennas may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals.
  • each communication device additionally includes a transmitter chain and a receiver chain, and those of ordinary skill in the art can understand that they all include a plurality of components related to signal transmission and reception (such as processors, modulators, multiplexers, etc.) , demodulator, demultiplexer or antenna, etc.). Therefore, the MIMO technology can be used for communication between the network device and the terminal device.
  • a terminal device may also be referred to as a UE, that is, a UE and a terminal device have the same meaning.
  • the terminal device will be replaced by UE below.
  • the UE in order to ensure the best transmission performance, the UE needs to measure the CQI of the downlink channel based on the CSI-RS sent by the network device, and feed back the measurement result to the network device. Based on the reported CQI measurement result, the network device estimates downlink quality.
  • the UE measures CQI on the assumption of SU-MIMO, that is, the reported CQI is the CQI corresponding to SU-MIMO transmission, but in actual downlink transmission, the user may be scheduled at the same time as other users, that is, transmitted in the form of MU-MIMO .
  • the network device usually adjusts the reported CQI corresponding to SU-MIMO transmission based on the total number of streams of paired users.
  • the reported CQI is the CQI corresponding to SU-MIMO transmission, and the rank is 1.
  • SINR MU SINR SU /K
  • SINR MU SINR corresponding to MU-MIMO transmission
  • SINR SU SINR corresponding to the reported CQI.
  • this calculation method is relatively rough, and the SINR is only adjusted from the perspective of the average transmit power corresponding to each spatial layer.
  • the SINR corresponding to the actual downlink is related to many factors.
  • this application proposes a communication method that considers the impact of interference factors on downlink quality, and determines the downlink quality based on interference factors and CQI. In addition, it also considers the impact of interference factors and MU precoding matrix on downlink quality. The impact of the link quality, so that the downlink quality can be determined more accurately, the MIMO channel characteristics are used, and the MIMO transmission rate is improved.
  • the first UE may be any one of the terminal device 102 to the terminal device 107 shown in FIG. 1
  • the network device may be the network device 101 shown in FIG. 1 .
  • the network device may also receive data signals from other UEs (such as the second UE, the third UE, etc.). In other words, the network device can perform data communication with multiple UEs, that is, transmit in the form of multiple users.
  • the execution subject of the method should not be construed in any way.
  • the program recorded with the code of the method provided by the embodiment of the present application can be executed, the method provided by the embodiment of the present application can be executed.
  • the first UE can also be replaced with a component configured in the first UE (such as a chip, a chip system, etc.), or other functional modules that can call programs and execute programs
  • the network device can also be replaced with a component configured in the network device Components (such as chips, chip systems, etc.), or other functional modules that can call programs and execute programs.
  • This embodiment of the present application does not limit it.
  • FIG. 2 is a schematic flowchart of a communication method 200 provided by an embodiment of the present application.
  • the method 200 shown in FIG. 2 may include S210 to S250, and each step in FIG. 2 will be described in detail below.
  • the first UE performs CSI measurement based on the downlink reference signal, so as to determine the CQI.
  • the CQI may indicate the channel quality, which may be understood as the quantization result of the SINR.
  • CQI can be associated with SINR value or MCS of channel quality.
  • the downlink reference signal may be a reference signal used for downlink channel measurement, and the downlink reference signal may include, but not limited to, CSI-RS, DMRS, SRS, SSB, etc., for example.
  • the first UE performs CSI measurement based on the CSI-RS from the network device to determine the CQI.
  • the first UE transmits in SU-MIMO according to the received CSI-RS from the network device and
  • the rank corresponding to the user is assumed to be R, and the corresponding SINR is calculated, or each rank is traversed within the preset value range of the rank, and the optimal rank and the corresponding SINR under the assumption of the rank are selected.
  • the rank corresponding to the user may be any rank value selected by the user within a preset range of rank values.
  • the first UE determines the SINR and quantizes the SINR into CQI. It should be understood that there is a mapping relationship between the SINR and the CQI, and specific calculation methods may be different, and this embodiment of the present application does not limit the mapping relationship between the two.
  • the user may be interfered by the paired user.
  • the flow number is represented by K.
  • the first UE generates indication information.
  • the indication information is used to indicate the interference factor of the first UE, and the interference factor may be used by the network device to determine the downlink quality.
  • the interference factor can be understood as the quantification of possible factors that may affect downlink quality.
  • the interference factor may be associated with a measurement value of the intensity of the interference received by the first UE, where the received interference may be inter-user interference caused by a paired user, or inter-stream interference caused by other data streams, It may also be inter-cell interference caused by neighboring cells.
  • the interference factor may also be a scaling factor or weighting factor of the strength of the received interference, or be associated with the scaling factor or weighting factor of the strength of the received interference, and is used to represent the ratio of the interference power to the reference power value, wherein,
  • the reference power value may correspond to a power value under a preset power algorithm.
  • the interference factor can also be associated with the intensity of the interference received compared to the dB value of the reference power value, indicating the dB value corresponding to the ratio of the interference power to the reference power value, or indicating the difference between the interference power and the reference power value dB value.
  • the indication information may be an index of an interference factor, and the index of the interference factor is determined from a predefined mapping relationship between multiple interference factors and multiple indices.
  • Table 3 shows the mapping relationship between interference factors and multiple indexes. It should be understood that, in specific implementation, the mapping relationship may only be part of the rows of the table. As shown in Table 3, through 3-bit quantization, the first column represents the index of the interference factor, and the index values are 0, 1, 2, ..., 7, 8 values in total. Column 2 represents the interference factor.
  • mapping relationship shown in Table 3 may be predefined by the protocol, may also be pre-configured by the network device, or may be pre-negotiated between UEs (including the first UE) within the coverage of the network device and the network device , which is not limited in this embodiment of the present application.
  • the mapping relationship may be pre-stored in the first UE and the network device in the form of a table, an array, or a queue, and the storage form of the mapping relationship is not limited in this embodiment of the present application.
  • the values of the information in the table are only examples, and may be configured as other values, which are not limited in this application.
  • the indication information may also be a receiver type of the first UE, where the receiver type is used to determine the interference factor.
  • the receiver type of the first UE may be indicated by, for example, an identifier of the receiver type, or may be further identified by an index corresponding to the receiver type of the first UE according to a pre-stored mapping relationship between multiple receiver types and multiple indexes. Indication, this application does not limit the specific indication method of the receiver type.
  • the interference factor is associated with the receiver type, and one receiver corresponds to one interference factor.
  • the foregoing indication information is used to indicate an interference factor.
  • Different receiver types have different suppression capabilities for multi-user interference, and the corresponding interference factors are also different.
  • the first UE uses an MMSE receiver, and based on the interference suppression capability of the receiver, it is determined that the interference factor is 0.2.
  • Interference factors may also be associated with time-frequency resources, for example, one interference factor corresponds to one time-frequency resource.
  • the interference factor corresponds to a frequency domain subband.
  • the bandwidth corresponding to the PDSCH can be divided into a plurality of frequency domain subbands, and the above indication information is used to indicate a plurality of interference factors, and each interference factor in the plurality of interference factors corresponds to a frequency domain subband.
  • the frequency domain sub-band includes one or more frequency domain units.
  • a frequency domain unit may be one or more resource blocks (resource block, RB).
  • each interference factor in the multiple interference factors may be used to determine the downlink quality of the corresponding frequency domain subband.
  • the downlink data PDSCH scheduling bandwidth is 48 RB
  • one frequency domain subband contains 4 RBs
  • each frequency domain subband corresponds to an interference factor
  • the first UE reports the 12 interference factors
  • the network device can determine the downlink quality of each frequency domain subband based on the 12 interference factors.
  • a possible implementation manner is that, based on the above-mentioned association relationship between the interference factor and the receiver type, or the association relationship with the time-frequency resource, the first UE determines the interference factor.
  • the value of the interference factor ⁇ The range is 0 ⁇ 1, and according to the mapping relationship between the interference factor and the index of the interference factor shown in Table 3, the index of the interference factor is determined, and the indication information is generated.
  • the first UE sends indication information to the network device.
  • the first UE After the first UE generates the indication information, it sends the indication information to the network device, the indication information indicates related factors that may affect the quality of the downlink, so that the network equipment can determine the quality of the downlink, and accordingly, the network device receives the indication information .
  • the first UE sends the CQI to the network device.
  • the network device receives the CQI, wherein the CQI is determined based on the CSI-RS. It should be understood that the indication information sent by the first UE in S230 and the CQI sent by the first UE in S240 may be sent separately or together, which is not limited in this embodiment of the present application.
  • the first UE may send the indication information each time it switches to a new network device, and/or send the indication information each time it switches the receiver type.
  • the first UE may report the CQI based on the reporting period of the CSI, and the two may be decoupled.
  • the first UE may report the CQI and the interference factor together each time the CSI is reported.
  • the first UE when the first UE sends the indication information and the CQI separately, the first UE may send the indication information first, and then send the CQI; or, the first UE first sends the CQI, and then sends the indication information.
  • This embodiment of the present application does not limit the order in which the two are sent.
  • the network device determines the downlink quality according to the interference factor and the CQI.
  • the transmission is in the form of MU-MIMO, that is, the first UE and other UEs are scheduled simultaneously.
  • the network device estimates the link quality during actual downlink transmission.
  • the downlink quality may be associated with related parameters of the downlink quality, such as SINR, MCS, and the like.
  • the MCS may have a corresponding relationship with the SINR.
  • there is a corresponding SINR for the MCS under a preset bit error rate or block error rate threshold, there is a corresponding SINR for the MCS, so as to establish a corresponding relationship between the SINR and the MCS in this way.
  • determining the downlink quality corresponding to the MU-MIMO transmission according to the interference factor and the CQI includes: determining the MU according to one or more of the total number of streams paired by the MU, the number of streams of the first UE, and the interference factor. - Downlink quality corresponding to MIMO transmission.
  • the downlink quality includes MU-SINR
  • MU-SINR represents the SINR corresponding to MU-MIMO transmission.
  • MU-SINR can be understood as the ratio of the limited signal power at the receiving end to the sum of interference power and noise power when the transmission mode is MU-MIMO.
  • the interference power may include one or more of interference from MU paired users, inter-cell interference caused by neighboring cells, and inter-stream interference caused by other data streams corresponding to the first UE.
  • the MU-SINR corresponding to the MU-MIMO transmission is determined according to the total number of streams of the MU pair, the number of streams of the first UE, and the interference factor.
  • MU-SINR meets:
  • SINR SU means SU-SINR
  • SINR MU means MU-SINR
  • K means the total number of streams paired by MU
  • R means the number of streams of the first UE
  • ⁇ means the interference factor, ⁇ >1, 0 ⁇ 1, K >R ⁇ 1, K and R are integers.
  • MU-SINR corresponding to the MU-MIMO transmission according to the total number of streams of the MU pair, the number of streams of the first UE, and the interference factor.
  • ⁇ represents the normalization factor of the MU precoding matrix
  • SINR SU represents SU-SINR
  • SINR MU represents MU-SINR
  • K represents the total flow number of MU pairing
  • R represents the flow number of the first UE
  • ⁇ represents the interference factor , ⁇ >1, 0 ⁇ 1, K>R ⁇ 1, K and R are integers.
  • the network device Based on the calculated SINR MU , the network device selects an adapted MCS and a transport block size for the first UE, and performs downlink data transmission. For the sake of brevity, details are not repeated here.
  • the network device determines the downlink quality according to the interference factor and the CQI.
  • the network device may determine the downlink quality according to the interference factor and the CQI.
  • the first UE receives an additional interference signal.
  • the interference signal may be neighbor cell interference caused by signals sent by other adjacent network devices to other UEs, or may be inter-flow interference caused by signals sent by other network devices to the first UE during multi-station coordinated transmission.
  • the network device estimates the link quality during actual downlink transmission.
  • the downlink quality may be related parameters characterizing the downlink quality, for example, SINR, MCS and so on. For related descriptions about SINR and MCS, please refer to the description in the MU-MIMO scenario, and details will not be repeated here.
  • determining the downlink quality according to the interference factor and the CQI includes: determining the downlink quality according to one or more of the number of flows of the first UE, measured adjacent cell interference power, and interference factor.
  • the network equipment when determining the downlink quality, the network equipment comprehensively considers possible factors that may affect the downlink quality, such as receiver performance, MU precoding matrix, etc., and combines CQI to determine the MU-
  • the downlink quality corresponding to MIMO transmission can determine the downlink quality more accurately, and the MIMO channel characteristics are used to improve the MIMO transmission rate.
  • Fig. 3 is a schematic diagram of the distribution of MU-SINR estimation results under different SU-SINRs provided by the embodiment of the present application.
  • the channel has time-varying characteristics, especially for users with high mobile speed, the channel will change to a certain extent with time, such as time-selective fading.
  • the interference of neighboring cells may also be different at different times. Since there is a certain time delay between the CQI measurement time and the actual downlink data scheduling time, within this time delay, the channel and interference may change to a certain extent. Therefore, whether it is SU-MIMO transmission or MU-MIMO transmission, the reported CQI cannot adapt to the channel characteristics at the current scheduling time.
  • the outer loop link adaptation (OLLA) technology is used to adaptively adjust the CQI.
  • OLLA converts the transmission error rate, such as error
  • the block rate is controlled within the preset target error rate.
  • the SINR adjusted by OLLA can be expressed as:
  • SINR SINR SU + ⁇ OLLA.
  • the preset target error rate is 0.1.
  • the CQI can be adjusted to the target CQI to a certain extent, so as to adapt to the current channel condition.
  • this adjustment method is slow, especially when there is a large gap between the SINR corresponding to the reported CQI and the SINR corresponding to the actual downlink, it takes a long time and after a large number of transmissions, the SINR can converge to the actual SINR.
  • FIG. 4 is a schematic diagram of the estimated SINR adjusted by OLLA and the actual downlink SINR corresponding to different transmission time intervals (transmission time interval, TTI) provided by the embodiment of the present application.
  • TTI transmission time interval
  • the abscissa represents the time interval, and the unit is millisecond (ms)
  • the ordinate represents the SINR, and the unit is dB.
  • the embodiment of the present application provides a communication method
  • the first UE can determine the first information according to the PDSCH, the first information can indicate the latest channel status, and report the first information to the network device, so that the network The device quickly adjusts the CQI based on the first information, so as to adapt to the current channel condition and increase the MIMO transmission rate.
  • FIG. 5 is a schematic flowchart of a communication method 500 provided by an embodiment of the present application.
  • the method 500 shown in FIG. 5 may include S510 to S550, and each step in FIG. 5 will be described in detail below.
  • the first UE determines the first CQI according to the downlink reference signal.
  • the downlink reference signal may be a reference signal used for downlink channel measurement, and the downlink reference signal may include, but not limited to, CSI-RS, DMRS, SRS, SSB, etc., and the type of the downlink reference signal in the embodiment of the present application is not limited.
  • the following describes the process for the first UE to determine the first CQI by taking the downlink reference signal as the CSI-RS as an example.
  • the first UE may perform CSI measurement according to the received CSI-RS from the network device, calculate the SINR, and quantize the SINR into a corresponding CQI to obtain the first CQI.
  • the first CQI is determined based on the CSI-RS.
  • the mapping relationship between the SINR and the CQI can refer to the existing protocol.
  • the first UE sends the first CQI to the network device.
  • the first CQI is determined based on the CSI-RS, and accordingly, the network device receives the first CQI. After receiving the first CQI, the network device further determines the MCS according to the mapping relationship between the CQI and the MCS, and sends downlink data based on the MCS.
  • the mapping relationship between CQI and MCS can refer to existing protocols.
  • the first CQI is the last reported CQI.
  • the last reported CQI may refer to the CQI carried in the last reported CSI.
  • the last reported CSI is associated with one or more CSI reports. It should be understood that the reported content in the CSI report includes CSI. CQI is included in CSI. Therefore, the last reported CSI is associated with one or more CSI reports, and it can also be understood that the last reported CSI is carried in one or more CSI reports. For the sake of brevity, descriptions of the same or similar cases are omitted below.
  • the last reported CSI may be the last reported CSI before the sending moment of the first information; it may also be the last reported CSI before the start position of the time unit where the first information is sent.
  • the last reported CSI may also be the last reported CSI before the PDSCH reception time used to determine the second CQI.
  • the PDSCH receiving moment corresponding to the second CQI may correspond to one time unit.
  • the first CQI may also be the CQI carried in the CSI reported at a preset time, or the CQI carried in the CSI reported within a preset time period.
  • the CSI reported at a preset time, or the CSI reported within a preset time period is associated with one or more CSI reports.
  • the CSI reported at the preset time, or the CSI reported within the preset time period may be the last reported CSI before k (k is a positive integer) time units before the sending time of the first information;
  • k may be an integer multiple of 2 (such as 2, 4, 8, etc.).
  • the CSI reported at the preset time, or the CSI reported within the preset time period may be the last report between k (k is a positive integer) time units before the sending time of the first information and the sending time of the first information CSI. ; It may also be the last reported CSI between k time units before the starting position of the time unit at which the first information is sent and the first information is sent.
  • k may be an integer multiple of 2 (such as 2, 4, 8, etc.).
  • the CSI reported at the preset time, or the CSI reported within the preset time period may be the last time k (k is a positive integer) time units before the time unit used to determine the PDSCH receiving time corresponding to the second CQI
  • the reported CSI may also be the last reported CSI k time units before the start position of the time unit used to determine the receiving moment of the PDSCH corresponding to the second CQI.
  • k may be an integer multiple of 2 (such as 2, 4, 8, etc.).
  • the first CQI is the CQI carried in the preset CSI.
  • Preset CSI can be associated with one or more CSI reports.
  • the network device indicates to the first UE the CSI or CSI report associated with the calculation of the first CQI by using the indication information.
  • the first CQI may also be the CQI carried in other CSI reports. It may be the CQI sent before the first information, or the CQI sent after the first information.
  • the network devices can all adjust based on the first information.
  • the first UE determines first information according to the received PDSCH.
  • the first UE may calculate the SINR according to the received PDSCH, and then determine the second CQI corresponding to the SINR. It can be understood that the second CQI may be determined based on a predefined mapping relationship between SINR and CQI.
  • the first information is associated with the first CQI. Specifically, the first information can be used to update the first CQI.
  • the first information indicates the adjustment amount of the CQI.
  • the CQI adjustment amount may specifically be a difference between the first CQI and the second CQI.
  • a possible implementation manner is that the first UE determines the second CQI according to the received PDSCH, and then calculates the difference between the first CQI and the second CQI, that is, the CQI adjustment amount, according to the first CQI.
  • the adjustment amount of CQI satisfies:
  • ⁇ CQI CQI 2 ⁇ CQI 1 , where ⁇ CQI represents the adjustment amount of the CQI; CQI 1 represents the first CQI, and CQI 2 represents the second CQI.
  • the first UE calculates the CQI adjustment amount and quantizes it according to the preset CQI adjustment amount quantization table to generate the first information, that is, the first information includes the index of the CQI adjustment amount.
  • the DMRS corresponds to the PDSCH.
  • the DMRS is a reference signal for demodulating PDSCH.
  • the first UE can calculate the SINR according to the DMRS corresponding to the PDSCH, and then determine the corresponding CQI, that is, the second CQI, and further, determine the adjustment of the CQI according to the first CQI and the second CQI quantity.
  • the DMRS corresponding to the PDSCH may be a reference signal sent together with the PDSCH data symbols, where the DMRS and the PDSCH data symbols undergo the same precoding process.
  • Table 4 is a quantization table of CQI adjustment amounts.
  • the first column is the index of the adjustment amount of the CQI, and the included values are 0, 1, 2, and 3, 4 values in total, and the second column is the adjustment amount of the CQI corresponding to the index.
  • the upwardly adjusted SINR value (such as 0.05 in the previous article) is usually smaller than the downwardly adjusted SINR value (such as 0.45 in the previous article), in this way, the downward adjustment of the SINR can be quickly adjusted to an appropriate value.
  • upward adjustment requires a long adjustment time. Therefore, in the design of the preset CQI adjustment amounts included in Table 4, the number of CQI adjustment amounts that are positive numbers is greater than the number of CQI adjustment amounts that are negative numbers. In other words, the number of quantized values adjusted to a larger value of the CQI is more than the number of quantized values adjusted to a smaller value.
  • the first information indicates the second CQI.
  • a possible implementation is that, after the first UE calculates the SINR according to the received PDSCH, and then determines the second CQI corresponding to the SINR, it can directly report the second CQI to the network device, so that the network device can update The first CQI determines the downlink quality according to the latest channel state, without calculating the adjustment amount of the CQI.
  • the first UE determines the first information according to the received DMRS corresponding to the PDSCH.
  • the first UE may calculate the SINR according to the received DMRS corresponding to the PDSCH, and then determine the second CQI corresponding to the SINR.
  • the DMRS corresponding to the PDSCH may be a reference signal sent together with the PDSCH data symbols, where the DMRS and the PDSCH data symbols undergo the same precoding process.
  • the first UE sends the first information to the network device.
  • the network device receives the first information from the first UE.
  • the first UE may transmit the first information through the PUCCH or the PUSCH.
  • the first information is carried in a hybrid automatic repeat request (hybrid automatic repeat request, HARQ) message.
  • hybrid automatic repeat request hybrid automatic repeat request
  • a possible implementation manner is that after the first UE generates the first information, it reports the first information and the ACK/NACK message to the network device through the HARQ message, and the network device can receive the first information and the ACK/NACK message.
  • the network device determines the downlink quality according to the first information.
  • the downlink quality includes downlink SINR.
  • the network device After receiving the first information, the network device further determines the SINR of the downlink according to the first information.
  • the first information may indicate the adjustment amount of the CQI, or may indicate the second CQI.
  • the first information indicates the CQI adjustment amount, that is, the index of the CQI adjustment amount received by the network device. After receiving the index of the CQI adjustment amount, the network device determines the CQI adjustment amount according to the CQI adjustment amount index, and determines the downlink SINR based on the CQI adjustment amount.
  • the network device determines the corresponding CQI adjustment amount according to the index of the CQI adjustment amount, and then calculates the second CQI based on the first CQI and the CQI adjustment amount, and the second CQI corresponds to the SINR determined according to the PDSCH The CQI.
  • the network device determines the second CQI, it further determines the SINR of the downlink.
  • the first information indicates the second CQI, that is, the network device receives the second CQI from the first UE, and then determines the downlink SINR according to the second CQI.
  • the second CQI may be the CQI corresponding to the SINR calculated by the first UE according to the received PDSCH.
  • the second CQI may also be determined based on the DMRS corresponding to the PDSCH.
  • the downlink SINR and the second CQI satisfy:
  • SINR DL is the SINR of the downlink
  • ⁇ OLLA is the adaptive OLLA adjustment amount of the outer ring link
  • CQI 2 represents the second CQI
  • the reported first CQI is 8
  • the network device schedules the first UE based on the reported first CQI to send downlink data.
  • the first UE detects and decodes the received PDSCH, calculates the corresponding SINR, and quantizes it to the corresponding CQI, that is, obtains the second CQI, and further calculates that the adjustment amount of the CQI is 2, then quantizes it as The corresponding index is shown in Table 4 as 2. Assuming that the transmission is correct, the first UE sends the index of the CQI adjustment and the ACK message to the network device through the HARQ message.
  • the network device receives the index of the CQI adjustment amount, and corresponds it to the CQI adjustment amount, that is, the CQI adjustment amount is 2, then according to the first CQI being 8, the second CQI is further calculated as 10, and according to the ACK message and the first CQI Two CQI, and the formula
  • the corresponding SINR DL is calculated, which is the SINR of the downlink.
  • the first UE detects and decodes the received PDSCH, calculates the corresponding SINR, and quantizes it to the corresponding CQI to obtain the second CQI, assuming that the second CQI is 10, and decoding correct. Further, the second CQI and the ACK message are reported to the network device, and the network device is based on the second CQI, the ACK message and the formula The downlink SINR is determined.
  • FIG. 7 is a schematic diagram of an estimated SINR adjusted by different adjustment methods and an actual downlink SINR provided by an embodiment of the present application.
  • the abscissa represents the time interval
  • the unit is ms
  • the ordinate represents the SINR
  • the unit is dB.
  • Figure a) shows the adjustment effect of the currently known technology
  • figure b) shows the adjustment effect of the method proposed in this application. It can be seen that for a currently known technology, CQI reporting and OLLA based on CSI measurement require nearly 150 TTI
  • the adjustment of the SINR can ensure that the estimated result of the SINR matches the actual SINR distribution of the downlink.
  • the method proposed in this application can quickly adjust the CQI, and adjust the estimated SINR value to the actual downlink SINR in a short time, so as to maximize the use of MIMO channel capabilities and increase the MIMO transmission rate.
  • the network device can quickly adjust the first CQI through the CQI adjustment amount reported by the first UE or the second CQI, so as to determine the actual downlink SINR, adapt to the current channel conditions, and improve MIMO Transmission rate.
  • the communication device provided by the embodiment of the present application will be described in detail below with reference to FIG. 8 and FIG. 9 .
  • FIG. 8 is a schematic block diagram of a communication device 800 provided by an embodiment of the present application.
  • the apparatus 800 may include: a transceiver unit 810 and a processing unit 820 .
  • the apparatus 800 may correspond to the first UE in the above method embodiment, for example, may be the first UE, or a component configured in the first UE, such as a chip, a chip system, and the like. Moreover, each unit in the apparatus 800 may be used to implement a corresponding process executed by the first UE in the method shown in FIG. 2 or FIG. 5 .
  • the transceiver unit 810 can be used to execute S230 and S240 in the method 200
  • the processing unit 820 can be used for S210 and S220 in the method 200 .
  • the apparatus may correspond to the network device in the above method embodiments, for example, may be a network device, or a component configured in the network device, such as a chip, a chip system, and the like.
  • each unit in the apparatus 800 may be used to implement a corresponding process executed by the network device in the method shown in FIG. 2 or FIG. 5 .
  • the processing unit 820 may be used to execute S250 in the method 200 .
  • each functional module in each embodiment of the present application may be integrated into one processor, or physically exist separately, or two or more modules may be integrated into one module.
  • the above-mentioned integrated modules can be implemented in the form of hardware or in the form of software function modules.
  • FIG. 9 is another schematic block diagram of a communication device 900 provided by an embodiment of the present application.
  • the device 900 may be a system on a chip, or may also be a device configured with a system on a chip to implement the communication function in the foregoing method embodiments.
  • the system-on-a-chip may be composed of chips, or may include chips and other discrete devices.
  • the apparatus 900 may include a processor 910 and a communication interface 920 .
  • the communication interface 920 can be used to communicate with other devices through a transmission medium, so that the devices used in the device 900 can communicate with other devices.
  • the communication interface 920 may be, for example, a transceiver, an interface, a bus, a circuit, or a device capable of implementing a transceiver function.
  • the processor 910 can use the communication interface 920 to input and output data, and implement the communication method described in the embodiment corresponding to FIG. 2 or FIG. 5 .
  • the apparatus 900 may be used to realize the function of the first UE or the function of the network device in the foregoing method embodiment.
  • the processor 910 can be used to control the communication interface 920 to send indication information and send CQI.
  • the communication interface 920 can be used to send indication information and send CQI.
  • the processor 910 can be used to control the communication interface 920 to receive indication information from the first UE, and the indication information is used to indicate
  • the interference factor receives the CQI from the first UE; and can be used to determine the downlink quality corresponding to MU-MIMO transmission according to the interference factor and the CQI.
  • the processor 910 can be used to control the communication interface 920 to receive the first CQI from the first UE, and the first CQI is Determined according to the downlink reference signal; receiving first information from the first UE, where the first information is associated with the first CQI; and used for determining downlink quality according to the first information.
  • the communication interface 920 can be used to control the communication interface 920 to receive the first CQI from the first UE, and the first CQI is Determined according to the downlink reference signal; receiving first information from the first UE, where the first information is associated with the first CQI; and used for determining downlink quality according to the first information.
  • the processor 910 can be used to control the communication interface 920 to send the first CQI; send the first information;
  • the reference signal is used to determine the first CQI; it is also used to determine the first information according to the received PDSCH.
  • the device 900 further includes at least one memory 930 for storing program instructions and/or data.
  • the memory 930 is coupled to the processor 910 .
  • the coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, which may be in electrical, mechanical or other forms, and is used for information exchange between devices, units or modules.
  • Processor 910 may operate in cooperation with memory 930 .
  • Processor 910 may execute program instructions stored in memory 930 . At least one of the at least one memory may be included in the processor.
  • the specific connection medium among the processor 910, the communication interface 920, and the memory 930 is not limited in the embodiment of the present application.
  • the processor 910 , the communication interface 920 and the memory 930 are connected through a bus 940 .
  • the bus 940 is represented by a thick line in FIG. 9 , and the connection manner between other components is only for schematic illustration and is not limited thereto.
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 9 , but it does not mean that there is only one bus or one type of bus.
  • the present application also provides a computer program product, and the computer program product includes: a computer program (also referred to as code, or an instruction), when the computer program is executed, the computer executes the implementation shown in FIG. 2 or FIG. 5 .
  • a computer program also referred to as code, or an instruction
  • the method executed by the first UE or the method executed by the network device when the computer program is executed, the computer executes the implementation shown in FIG. 2 or FIG. 5 .
  • the method executed by the first UE or the method executed by the network device when the computer program is executed, the computer executes the implementation shown in FIG. 2 or FIG. 5 .
  • the present application also provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program (also called a code, or an instruction).
  • a computer program also called a code, or an instruction.
  • the computer program When the computer program is executed, the computer is made to execute the method executed by the first UE or the method executed by the network device in the embodiment shown in FIG. 2 or FIG. 5 .
  • the processor in this embodiment of the present application may be an integrated circuit chip that has a signal processing capability.
  • each step of the above-mentioned method embodiments may be completed by an integrated logic circuit of hardware in a processor or instructions in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or other possible Program logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • Program logic devices discrete gate or transistor logic devices, discrete hardware components.
  • 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, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erases programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (RAM), which acts as external cache memory.
  • RAM random access memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • ESDRAM enhanced synchronous dynamic random access memory
  • SLDRAM direct memory bus random access memory
  • direct rambus RAM direct rambus RAM
  • unit may be used to denote a computer-related entity, hardware, firmware, a combination of hardware and software, software, or software in execution.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • each functional unit may be fully or partially 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 comprises one or more computer instructions (programs). When the computer program instructions (program) are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • 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 (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
  • the computer-readable storage medium may be any available medium that can be accessed 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 (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disk, SSD) )wait.
  • a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
  • an optical medium for example, a digital versatile disc (digital video disc, DVD)
  • a semiconductor medium for example, a solid state disk (solid state disk, SSD)
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

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Abstract

Selon des modes de réalisation, la présente demande concerne un procédé de communication et un appareil de communication. Le procédé consiste : à déterminer, par un dispositif de réseau, une qualité de liaison descendante en fonction d'informations d'indication reçues en provenance d'un premier équipement utilisateur et d'une indication de qualité de canal, les informations d'indication étant utilisées pour indiquer un facteur d'interférence. L'impact du facteur d'interférence sur la qualité de liaison descendante est pris en considération de manière complète, et ainsi la qualité de liaison descendante peut être déterminée avec plus de précision. De plus, des caractéristiques de canal MIMO sont utilisées, ce qui améliore le débit de transmission MIMO.
PCT/CN2022/111833 2021-08-13 2022-08-11 Procédé de communication et appareil de communication WO2023016522A1 (fr)

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US12022308B2 (en) * 2021-10-13 2024-06-25 Verizon Patent And Licensing Inc. Systems and methods for determining a massive multiple-input and multiple-output configuration for transmitting data

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CN104639271A (zh) * 2013-11-15 2015-05-20 华为技术有限公司 一种下行sinr估算方法和基站
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CN102986269A (zh) * 2009-03-17 2013-03-20 华为技术有限公司 一种估计下行信道质量的方法和装置
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