WO2017096954A1 - Cqi估计、sinr确定方法及相关设备 - Google Patents

Cqi估计、sinr确定方法及相关设备 Download PDF

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Publication number
WO2017096954A1
WO2017096954A1 PCT/CN2016/096577 CN2016096577W WO2017096954A1 WO 2017096954 A1 WO2017096954 A1 WO 2017096954A1 CN 2016096577 W CN2016096577 W CN 2016096577W WO 2017096954 A1 WO2017096954 A1 WO 2017096954A1
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WIPO (PCT)
Prior art keywords
time
terminal
dmrs
frequency resource
data layer
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PCT/CN2016/096577
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English (en)
French (fr)
Inventor
宋扬
苏昕
刘龙
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电信科学技术研究院
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Publication of WO2017096954A1 publication Critical patent/WO2017096954A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B17/00Monitoring; Testing
    • H04B17/30Monitoring; Testing of propagation channels
    • H04B17/309Measuring or estimating channel quality parameters
    • H04B17/336Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/0632Channel quality parameters, e.g. channel quality indicator [CQI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a channel quality indicator (CQI) estimation, a signal-to-interference and noise ratio (SINR) determining method, and related devices.
  • CQI channel quality indicator
  • SINR signal-to-interference and noise ratio
  • Time Division Duplex (TDD) mode is very suitable for large-scale antenna systems, because the base station can measure channels through the uplink Sounding Reference Signal (SRS) according to channel reciprocity.
  • SRS Sounding Reference Signal
  • Matrix reducing downlink pilot overhead.
  • One way is to transmit CRS or CSI-RS only by some base station transmit antennas, so that the formed beam can cover a wide range of angles, but the CRS or CSI-RS power received by the user will be much lower than the beamformed data service. Power. If the CRS or CSI-RS port is beamformed, users with certain angles may not be covered.
  • An embodiment of the present invention provides a method for determining a signal to interference and noise ratio, including:
  • each data layer of the time-frequency resource of the terminal corresponds to a first SINR.
  • the determining, by the base station, the information of the second equivalent channel corresponding to each data layer of the time-frequency resource of the terminal at the next scheduling moment including:
  • the base station according to information about the first equivalent channel of the terminal, information of the second equivalent channel corresponding to each data layer of the time-frequency resource, and the CQI Determining, by the next scheduling time, a first SINR corresponding to each data layer of the time-frequency resource of the terminal, including:
  • the base station calculates, for each data layer of the time-frequency resource of the terminal at the next scheduling moment, information of a second equivalent channel of the data layer and a gain of information of the first equivalent channel, Determining the first SINR value corresponding to the data layer according to a product of the obtained gain and the second SINR value.
  • the preset DMRS port is a DMRS port pre-agreed by the base station and the terminal.
  • the base station determines the CQI that is last reported by the terminal, and determines the information of the first equivalent channel of the data layer corresponding to the first DMRS in the time-frequency resource at the transmission time of the first DMRS used for calculating the CQI, Determining information of a second equivalent message corresponding to each data layer of the time-frequency resource of the terminal at the next scheduling time, and corresponding to each data layer of the time-frequency resource according to the information of the first equivalent channel Information of the second equivalent channel and the CQI, determining the next tone
  • the first SINR corresponding to each data layer of the time-frequency resource of the terminal at a time so that the MCS used to transmit data to the terminal at the next scheduling time can be accurately estimated according to the first SINR of each data layer. , improve throughput.
  • the terminal reports the estimated CQI to the base station at the CQI reporting time, and the CQI is estimated according to the measured interference noise and the information of the equivalent channel determined by the DMRS received at the latest scheduling.
  • the DMRS received when the latest one is scheduled is a DMRS received through a preset DMRS port.
  • the preset DMRS port is a DMRS port pre-agreed by the terminal and the base station.
  • the embodiment of the invention further provides a base station, including:
  • a first processing module configured to determine a CQI of a time-frequency resource corresponding to the terminal that is last reported by the terminal, where the CQI is used by the terminal to report interference noise measured before the CQI time and the last time received when scheduled Estimating the information of the equivalent channel corresponding to the DMRS, wherein the first DMRS is a DMRS used to calculate the CQI;
  • a second processing module configured to determine information about a first equivalent channel of a data layer corresponding to the first DMRS in the time-frequency resource of the first DMRS of the terminal;
  • a third processing module configured to determine, at a next scheduling moment, information about a second equivalent channel corresponding to each data layer of the time-frequency resource of the terminal;
  • a fourth processing module configured to: according to information about the first equivalent channel of the terminal, the time Determining, by the CQI, the first SINR corresponding to each data layer of the time-frequency resource of the terminal at the next scheduling time, the information of the second equivalent channel corresponding to each data layer of the frequency resource and the CQI.
  • the second processing module is specifically configured to:
  • Determining, according to the SRS of the terminal that is received last time before the first DMRS transmission time of the terminal, a channel matrix of the time-frequency resource, and determining the sending moment of the first DMRS of the terminal Determining, by the data layer corresponding to the first DMRS, a precoding vector used by the time-frequency resource, determining information of the first equivalent channel according to the channel matrix and the precoding vector; or
  • the data layer corresponding to the first DMRS determines the information of the first equivalent channel according to the channel matrix and the shaping vector in a shaping vector used by the time-frequency resource.
  • the third processing module is specifically configured to:
  • the fourth processing module is specifically configured to:
  • the product of the gain and the second SINR value determines the first SINR value corresponding to the data layer.
  • the fourth processing module is specifically configured to:
  • the first DMRS is a DMRS transmitted through a preset DMRS port.
  • the preset DMRS port is a DMRS port pre-agreed by the base station and the terminal.
  • the embodiment of the invention further provides a terminal, including:
  • a processing module configured to determine information of an equivalent channel according to the received DMRS
  • the reporting module is configured to report the estimated CQI to the base station at a CQI reporting time, where the CQI is estimated according to the measured interference noise and the information of the equivalent channel determined by the DMRS received at the most recent scheduling.
  • the DMRS received when the latest one is scheduled is a DMRS received through a preset DMRS port.
  • the preset DMRS port is a DMRS port pre-agreed by the terminal and the base station.
  • the embodiment of the present invention further provides another terminal, where the terminal mainly includes a processor, a memory, and a transceiver, wherein the transceiver is configured to receive and transmit data under the control of the processor, and the preset program is stored in the memory.
  • the processor is used to read a program saved in the memory, and the following process is performed according to the program:
  • the estimated CQI is reported to the base station by the transceiver at the CQI reporting time, and the CQI is estimated based on the measured interference noise and the information of the equivalent channel determined by the DMRS received at the most recent scheduling.
  • the DMRS received when the latest one is scheduled is a DMRS received through a preset DMRS port.
  • the preset DMRS port is a DMRS port pre-agreed by the terminal and the base station.
  • the base station mainly includes a processor, a memory, and a transceiver.
  • the transceiver is configured to receive and transmit data under the control of the processor, and the preset program is stored in the memory.
  • the processor is configured to read a program saved in the memory, and execute the following process according to the program:
  • the information is estimated, wherein the first DMRS is a DMRS used to calculate the CQI;
  • Each data layer of the time-frequency resource has a corresponding first SINR.
  • the processor determines a channel matrix of the time-frequency resource according to the SRS of the terminal that is received last time before the first DMRS transmission time of the terminal, and determines the number of the terminal a precoding vector used by the data layer corresponding to the first DMRS at the time of transmission of the DMRS according to the channel matrix and the precoding vector Information of the first equivalent channel; or
  • the data layer corresponding to the first DMRS determines the information of the first equivalent channel according to the channel matrix and the shaping vector in a shaping vector used by the time-frequency resource.
  • the processor determines a channel matrix of the time-frequency resource according to the SRS of the terminal that is received last time before the next scheduling moment, and determines each data layer of the time-frequency resource of the terminal.
  • Corresponding precoding vectors respectively, determining, according to respective precoding vectors of each data layer of the time-frequency resource of the terminal and the channel matrix, respectively, corresponding to each data layer of the time-frequency resource Information of two equivalent channels;
  • the processor determines a second SINR value of the data layer corresponding to the first DMRS of the time-frequency resource of the terminal at the CQI reporting time corresponding to the CQI;
  • the product of the gain and the second SINR value determines the first SINR value corresponding to the data layer.
  • the processor calculates the power of the second equivalent channel of the data layer and the first equivalent channel for each data layer of the time-frequency resource of the terminal at the next scheduling time.
  • the ratio of the powers is determined by the product of the obtained ratio and the second SINR value to determine the first SINR value corresponding to the data layer.
  • the first DMRS is transmitted through a preset DMRS port. DMRS.
  • the preset DMRS port is a DMRS port pre-agreed by the base station and the terminal.
  • FIG. 1 is a schematic flowchart of a method for performing CQI estimation by a terminal according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a process for a terminal to calculate an equivalent channel of a scheduled time DMRS according to an embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for determining, by a base station, an SINR according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a process of a base station pushing a terminal to send a second SINR at a DMRS moment according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a process for a base station to calculate power of a first equivalent channel at a scheduled time of a terminal according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a process of determining, by a base station, a first SINR of a terminal at a current scheduling time according to an embodiment of the present disclosure
  • FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of another terminal according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of another base station according to an embodiment of the present invention.
  • the core idea of the terminal for estimating and reporting the CQI in the embodiment of the present invention is that the terminal measures the preset downlink DMRS port when the data is scheduled to be transmitted, and calculates the information of the equivalent channel of the DMRS port, and if the terminal has been scheduled at the CQI reporting time. Or being scheduled, reporting to the base station The amount of interference noise and the CQI estimated from the information of the equivalent channel of the preset DMRS port when it was last scheduled.
  • the method for performing CQI estimation by the terminal is as follows:
  • Step 101 The terminal determines information of an equivalent channel according to the received DMRS.
  • the terminal receives the DMRS sent by the base station each time the data is scheduled to be transmitted by the terminal, and determines the information of the equivalent channel according to the DMRS.
  • the information of the equivalent channel includes information of an original channel matrix between the transmitting and receiving antennas and an equivalent channel of the precoding matrix synthesis information.
  • the terminal determines information of an equivalent channel corresponding to the DMRS received by the preset DMRS port, and estimates the CQI according to the information of the equivalent channel and the measured interference noise.
  • the preset DMRS port is a DMRS port pre-agreed by the terminal and the base station.
  • the downlink DMRS port with the lower sequence number is selected as the downlink DMRS port agreed by the base station and the terminal.
  • Step 102 The terminal reports the estimated CQI to the base station at the CQI reporting time, and the CQI is estimated according to the measured interference noise and the information of the equivalent channel determined by the DMRS received at the latest scheduling.
  • the CQI reporting time of the terminal is indicated by the base station by using a signaling, and may be periodic reporting or non-periodic reporting.
  • the CQI reported by the terminal to the base station at the time of reporting by the CQI may be the CQI estimated by the terminal according to the measured interference noise and the information of the equivalent channel determined by the DMRS received at the latest scheduled time in the CQI reporting time, or may be In the CQI saved for the terminal, the obtained CQI is estimated based on the measured interference noise and the information of the equivalent channel determined by the DMRS received at the most recent scheduled time.
  • the CQI estimated by the CQI is reported to the base station, and the estimated interference noise is compared with the information of the equivalent channel corresponding to the DMRS received by the preset DMRS port. .
  • the terminal transmits the SRS according to the indication period of the base station.
  • the terminal estimates the equivalent channel information based on the DMRS of the downlink DMRS port agreed with the base station once the terminal is scheduled to transmit data. If the terminal is scheduled to be scheduled by the CQI, the terminal reports the preset initial CQI to the base station. If it is determined that the terminal has been scheduled or is being scheduled, the terminal reports the estimated CQI to the base station. The estimated CQI is obtained according to the equivalent channel determined by the DMRS port agreed upon by the terminal when the terminal was last scheduled, and the average interference noise of the terminal at the latest scheduled time or the time before the CQI reporting time.
  • the equivalent channel vector of all receiving antennas on the resource unit RE(m, q) estimated by the terminal k according to the preset DMRS port when being last scheduled is
  • l 1 represents the data layer corresponding to the preset DMRS port.
  • H k (m, q) is the original channel matrix between all transmit antennas of the base station to all receive antennas of terminal k.
  • the SINR of RE(m, q) can be calculated based on the equivalent channel vector estimated by the preset DMRS port, expressed as:
  • ⁇ 2 is the interference and noise power
  • ⁇ 2 can be obtained by CRS measurement, or can be obtained by DMRS measurement, or can be the average interference noise power of the terminal at the scheduled time or CQI reporting time.
  • the effective SINR is calculated on the time-frequency resource corresponding to the CQI, and the SINR of each resource element (RE) or each sub-carrier on the time-frequency resource is calculated in a certain manner to obtain a valid SINR, such as an exponential effective SINR.
  • EESM Exponential Effective SINR Mapping
  • MIESM Mutual Information Effective SINR Mapping
  • the obtained effective SINR is quantized to obtain a CQI on the time-frequency resource.
  • FIG. 2 is a schematic diagram of a process of calculating an equivalent channel and reporting a CQI by the terminal, where D represents a downlink subframe, U represents an uplink subframe, and S represents a special subframe.
  • the base station schedules the terminal k in a downlink subframe, the terminal k receives the DMRS in the downlink subframe, and calculates the equivalent channel power according to the DMRS received by the DMRS port agreed with the base station.
  • the equivalent channel power calculated by the DMRS received by the DMRS port agreed with the base station when the terminal is scheduled last time before the CQI reporting time arrives.
  • the terminal determines the information of the equivalent channel according to the DMRS sent by the base station, and reports the CQI according to the information of the equivalent channel and the estimated interference noise estimation to the base station at the time of reporting the CQI, thereby avoiding the use of the CRS or the CSI-RS.
  • Measuring CQI needs to cover the CRS or CSI-RS to all users in the horizontal and vertical dimensions, which are far and near, and can save the overhead of CRS and CSI-RS.
  • the preset DMRS port is one The amount of CQI feedback is small, and since the DMRS is pre-coded or beam-formed for the user, the accuracy of the CQI measurement is very high.
  • the method for determining a signal-to-interference and noise ratio (SINR) by a base station is as follows:
  • Step 301 The base station determines the CQI of a time-frequency resource corresponding to the terminal that is reported by the terminal, and the CQI is equivalent to the interference noise measured by the terminal according to the CQI reporting time and the first DMRS received when the latest scheduling is received. The information of the channel is estimated.
  • the first DMRS is a DMRS used when calculating the CQI.
  • the first DMRS is a DMRS transmitted through a preset DMRS port.
  • the preset DMRS port is a DMRS port pre-agreed by the base station and the terminal.
  • the base station sends the DMRS through multiple DMRS ports when transmitting data to the scheduled terminal, where one DMRS port is a DMRS port agreed by the base station and the terminal, and the agreed DMRS port is used by the terminal to determine an equivalent channel and according to the determined Equivalent channel estimation CQI.
  • Step 302 The base station determines information about the first equivalent channel of the data layer corresponding to the first DMRS in the time-frequency resource at the sending time of the first DMRS of the terminal.
  • the data layer corresponding to the first DMRS is a data layer corresponding to the DMRS port that transmits the first DMRS.
  • the information of the first equivalent channel may specifically be an equivalent channel matrix, an equivalent channel power, or the like.
  • the time-frequency resource is one time-frequency resource of the plurality of time-frequency resources allocated to the terminal in the whole system bandwidth, and the calculation process of the information of the first equivalent channel of the other time-frequency resources allocated to the terminal is Same as this process, and will not be described here.
  • the base station estimates the channel matrix of the terminal based on the SRS transmitted by the terminal.
  • the base station performs uplink channel estimation by measuring SRS receiving signals of each terminal, and obtains a downlink channel matrix of each terminal according to channel reciprocity.
  • the determining process of the information of the first equivalent channel is:
  • the shaping vector used by the time-frequency resource determines information of the first equivalent channel of the time-frequency resource according to the channel matrix and the shaping vector.
  • Step 303 The base station determines, at a next scheduling moment, information of a second equivalent channel corresponding to each data layer of the time-frequency resource of the terminal.
  • the information of the second equivalent channel may be an equivalent channel matrix, an equivalent channel power, or the like.
  • the determining process of the information of the second equivalent channel is:
  • the respective precoding vector of each data layer of the time-frequency resource and the letter The track matrix respectively determines information of a second equivalent channel corresponding to each data layer of the time-frequency resource;
  • Step 304 The base station determines, according to the information of the first equivalent channel of the terminal, the information of the second equivalent channel corresponding to each data layer of the time-frequency resource, and the CQI, the time-frequency of the terminal at the next scheduling time.
  • Each data layer of the resource corresponds to a first SINR.
  • the base station determines, according to the first SINR corresponding to each data layer of the time-frequency resource, a modulation and coding scheme (MCS) used when transmitting data to the terminal at the next scheduling time.
  • MCS modulation and coding scheme
  • the specific process of determining, by the base station, the first SINR corresponding to each data layer of the time-frequency resource of the terminal at the next scheduling time is:
  • the base station Determining, by the base station, the second SINR value of the data layer corresponding to the first DMRS of the time-frequency resource of the terminal at the CQI corresponding to the CQI; the base station respectively for each data layer of the time-frequency resource of the terminal at the next scheduling time, Calculating a gain of the information of the second equivalent channel of the data layer and the information of the first equivalent channel, and determining a first SINR value corresponding to the data layer according to a product of the obtained gain and the second SINR value.
  • the base station calculates the power of the second equivalent channel of the data layer for each data layer of the time-frequency resource of the terminal at the next scheduling time. And a ratio of the power of the first equivalent channel, and determining a first SINR value corresponding to the data layer according to a product of the obtained ratio and the second SINR value.
  • the base station derives a second SINR value of the data layer 11 corresponding to the preset DMRS port of the time-frequency resource according to the CQI reported by the terminal, and saves the second SINR value obtained by the derivation.
  • the base station receives CQI reported by a terminal in uplink subframe n 1 time, according to the predetermined downlink CQI derived DMRS ports corresponding to a second data layer l 1 is the value of SINR k at terminal
  • the base station derives the second SINR value of the data layer 11 corresponding to the preset downlink DMRS port of the terminal k according to the CQI reported by the uplink subframe n 2 .
  • the base station schedules the terminal and transmits data to the terminal, it saves the power of the first equivalent channel of the data layer corresponding to the preset downlink DMRS port of the terminal at the current time.
  • the power of the first equivalent channel of the data layer 11 corresponding to the agreed downlink DMRS port at the time n terminal k is expressed as:
  • H k (n- ⁇ n SRS ) indicates the time of the last reception of the SRS of the terminal k before the time n according to the SRS
  • the measured channel matrix, ⁇ n SRS represents the time difference between the time when the base station receives the SRS of the terminal k and the current scheduling time, Indicates a precoding or beamforming vector used by the data layer 11 corresponding to the preset downlink DMRS port of the terminal n at the time n.
  • the base station at the next scheduled terminal k is derived (time n, two figures illustrate, respectively, n 1, and the scheduled time n 2) process for each data layer is first SINR:
  • n represents the current time
  • ⁇ n represents the time difference between the time when the base station last received the CQI reported by the terminal k to the current time
  • the power stored by the base station is the power of the first equivalent channel of the data layer corresponding to the preset downlink DMRS port at the scheduled time corresponding to the CQI reported by the CQI, and is expressed as: , N represents the current time, ⁇ n p represents the terminal k CQI reporting timing reported CQI corresponding to the scheduled time is the time difference between the time of the current;
  • the second equivalent channel power of each data layer of the terminal at the current time calculated by the base station is expressed as: among them, Representing a precoding or beamforming vector used by the data layer l i of the terminal k at the current time;
  • the SINR adjustment factor may be obtained by an adaptive adjustment of an Acknowledgement/Negative Acknowledgement (ACK/NACK) report.
  • the base station determines the CQI that is last reported by the terminal, and determines the information of the first equivalent channel of the data layer corresponding to the first DMRS in the time-frequency resource at the transmission time of the first DMRS used for calculating the CQI, Determining information of a second equivalent message corresponding to each data layer of the time-frequency resource of the terminal at the next scheduling time, and corresponding to each data layer of the time-frequency resource according to the information of the first equivalent channel.
  • the information of the second equivalent channel and the CQI determine the first SINR corresponding to each data layer of the time-frequency resource of the terminal at the next scheduling time, so that the first SINR of each data layer can be accurately determined.
  • the MCS used to transmit data to the terminal at the next scheduling time is estimated to improve the throughput.
  • the terminal mainly includes :
  • the processing module 701 is configured to determine information of an equivalent channel according to the received DMRS;
  • the reporting module 702 is configured to report the estimated CQI to the base station at the CQI reporting time, where the CQI is estimated according to the measured interference noise and the information of the equivalent channel determined by the DMRS received at the most recent scheduling.
  • the DMRS received when the latest one is scheduled is a DMRS received through a preset DMRS port.
  • the preset DMRS port is a DMRS port pre-agreed by the terminal and the base station.
  • the base station mainly includes :
  • the first processing module 801 is configured to determine a CQI of a time-frequency resource corresponding to the terminal that is last reported by the terminal, where the CQI is received by the terminal according to the CQI reporting interference noise before the time and the last time it is scheduled. Estimating the information of the equivalent channel corresponding to the first DMRS, wherein the first DMRS is a DMRS used to calculate the CQI;
  • the second processing module 802 is configured to determine information about a first equivalent channel of a data layer corresponding to the first DMRS in the time-frequency resource at a sending moment of the first DMRS of the terminal;
  • the third processing module 803 is configured to determine, according to a next scheduling moment, information about a second equivalent channel corresponding to each data layer of the time-frequency resource of the terminal;
  • the fourth processing module 804 is configured to: according to information about the first equivalent channel of the terminal, information about the second equivalent channel corresponding to each data layer of the time-frequency resource, and the CQI, Determining a first SINR corresponding to each data layer of the time-frequency resource of the terminal at the next scheduling moment.
  • the second processing module 802 is specifically configured to:
  • Determining, according to the SRS of the terminal that is received last time before the first DMRS transmission time of the terminal, a channel matrix of the time-frequency resource, and determining the sending moment of the first DMRS of the terminal Determining, by the data layer corresponding to the first DMRS, a precoding vector used by the time-frequency resource, determining information of the first equivalent channel according to the channel matrix and the precoding vector; or
  • the data layer corresponding to the first DMRS determines the information of the first equivalent channel according to the channel matrix and the shaping vector in a shaping vector used by the time-frequency resource.
  • the third processing module is specifically configured to:
  • Determining the time according to the SRS of the terminal that was received last time before the next scheduling time a channel matrix of the frequency resource, and determining a precoding vector corresponding to each of the data layers of the time-frequency resource of the terminal, according to respective precoding vectors of each data layer of the time-frequency resource of the terminal and The channel matrix respectively determines information of the second equivalent channel corresponding to each data layer of the time-frequency resource;
  • the fourth processing module is specifically configured to:
  • the product of the gain and the second SINR value determines the first SINR value corresponding to the data layer.
  • the fourth processing module is specifically configured to:
  • the first DMRS is a DMRS transmitted through a preset DMRS port.
  • the preset DMRS port is a DMRS port pre-agreed by the base station and the terminal.
  • the terminal mainly includes a processor 901, a memory 902, and a transceiver 903.
  • the transceiver 903 is configured to receive and transmit data under the control of the processor 901.
  • the memory 902 stores a preset program, and the processor 901 is configured to read
  • the program saved in the memory 902 is taken, and the following process is executed in accordance with the program:
  • the estimated CQI is reported to the base station by the transceiver at the CQI reporting time, and the CQI is estimated based on the measured interference noise and the information of the equivalent channel determined by the DMRS received at the most recent scheduling.
  • the DMRS received when the latest one is scheduled is a DMRS received through a preset DMRS port.
  • the preset DMRS port is a DMRS port pre-agreed by the terminal and the base station.
  • the processor, the memory and the transceiver are connected by a bus, and the bus architecture may include any number of interconnected buses and bridges, and various circuit links of the memory represented by one or more processors and memories represented by the processor. Together.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the transceiver can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor is responsible for managing the bus architecture and the usual processing, and the memory can store the data that the processor uses when performing operations.
  • the base station mainly includes The processor 1001 is configured to receive and transmit data under the control of the processor 1001.
  • the memory 1002 stores a preset program, and the processor 1001 is configured to read the memory 1002.
  • the processor 1001 is configured to receive and transmit data under the control of the processor 1001.
  • the saved program, according to the program performs the following process:
  • Each data layer of the time-frequency resource has a corresponding first SINR.
  • the processor determines a channel matrix of the time-frequency resource according to the SRS of the terminal that is received last time before the first DMRS transmission time of the terminal, and determines the first DMRS of the terminal.
  • the data layer corresponding to the first DMRS at the time of transmission is used in the precoding vector used by the time-frequency resource, and the information of the first equivalent channel is determined according to the channel matrix and the precoding vector; or
  • the data layer corresponding to the first DMRS determines the information of the first equivalent channel according to the channel matrix and the shaping vector in a shaping vector used by the time-frequency resource.
  • the processor determines a channel matrix of the time-frequency resource according to the SRS of the terminal that is received last time before the next scheduling time, and determines that each data layer of the time-frequency resource of the terminal corresponds to each Precoding vectors, respectively determining, according to respective precoding vectors of each data layer of the time-frequency resource of the terminal and the channel matrix, respectively, the second equivalent corresponding to each data layer of the time-frequency resource Channel information;
  • the processor determines a second SINR value of the data layer corresponding to the first DMRS of the time-frequency resource of the terminal at the CQI reporting time corresponding to the CQI;
  • the product of the gain and the second SINR value determines the first SINR value corresponding to the data layer.
  • the processor calculates, respectively, the power of the second equivalent channel of the data layer and the power of the first equivalent channel for each data layer of the time-frequency resource of the terminal at the next scheduling time. And comparing, by the product of the obtained ratio and the second SINR value, the first SINR value corresponding to the data layer.
  • the first DMRS is a DMRS transmitted through a preset DMRS port.
  • the preset DMRS port is a DMRS port pre-agreed by the base station and the terminal.
  • the processor, the memory and the transceiver are connected by a bus, and the bus architecture may include any number of interconnected buses and bridges, and various circuit links of the memory represented by one or more processors and memories represented by the processor. Together.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • the transceiver can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor is responsible for managing the bus architecture and the usual processing, and the memory can store the data that the processor uses when performing operations.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention may employ computer-usable storage media (including but not limited to disks) in one or more of the computer-usable program code embodied therein. A form of computer program product embodied on a memory and optical storage, etc.).
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

一种CQI估计、SINR确定方法及相关设备,用以解决利用CRS或CSI-RS测量CQI需要将CRS或CSI-RS覆盖到小区内分布在水平维和垂直维、有远有近的所有用户的问题。该方法为:基站确定终端最近一次上报的所述终端对应的一个时频资源的CQI,确定第一DMRS的发送时刻在该时频资源中与第一DMRS对应的数据层的第一等效信道的信息,第一DMRS为计算该CQI采用的DMRS;基站在终端的下一调度时刻,确定该时频资源的每个数据层各自对应的第二等效信道的信息;基站根据第一等效信道的信息、第二等效信道的信息以及CQI,确定终端的下一调度时刻该时频资源的每个数据层各自对应的第一SINR。

Description

CQI估计、SINR确定方法及相关设备
本申请要求在2015年12月10日提交中国专利局、申请号为201510918267.3、发明名称为“CQI估计、SINR确定方法及相关设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域,尤其涉及一种信道质量指示(CQI,Channel Quality Indicator)估计、信干噪比(Signal-to-Interference and Noise Ratio,SINR)确定方法及相关设备。
背景技术
现有的长期演进(Long Term Evolution,LTE)系统中,基站发送下行的小区专用参考信号(Cell-Specific Reference Signal,CRS)或信道状态信息参考信号(Channel State Information-Reference Signal,CSI-RS);终端基于CRS或CSI-RS测量信道状态信息(CSI,Channel State Information)并报告给基站,用于基站调度。
通常CSI包括秩指示(Rank Indicator,RI)、预编码矩阵指示(Precoding Matrix Indicator,PMI)、信道质量指示(Channel Quality Indicator,CQI)等,其中CQI反映了终端接收到的信号功率与干扰和噪声功率的比值信息,在基站调度和选择调制编码方案(Modulation and Coding Scheme,MCS)时非常重要。通常CQI是基于CRS或CSI-RS,并按照某种多输入多输出(Multiple Input Multiple Output,MIMO)传输模式进行计算的。
大规模天线系统是未来无线移动通信系统采用的关键技术之一。从CSI获取角度来讲,时分双工(Time Division Duplex,TDD)方式非常适合于大规模天线系统,因为基站可以根据信道互易性,通过上行的探测参考信号(Sounding Reference Signal,SRS)测量信道矩阵,降低下行导频开销。
目前在采用二维天线阵列的大规模天线系统中利用CRS或CSI-RS测量 CQI需要将CRS或CSI-RS覆盖到小区内分布在水平维和垂直维、有远有近的所有用户。
一种方式是仅由部分基站发射天线发送CRS或CSI-RS,这样形成的波束能够覆盖较宽角度的范围,但是用户接收的CRS或CSI-RS功率会远低于经过波束赋形的数据业务的功率。如果将CRS或CSI-RS端口经过波束赋形,可能会出现某些角度的用户不能被覆盖到。
另一种方式是基站发送面向用户的CSI-RS,即CSI-RS的波束赋形针对各个用户,问题在于基站如何确定面向各用户的CSI-RS的波束赋形;另外当用户非常多时,面向各用户的CSI-RS的开销非常大。
发明内容
本发明实施例提供一种CQI估计方法、SINR确定方法及相关设备,用以解决利用CRS或CSI-RS测量CQI需要将CRS或CSI-RS覆盖到小区内分布在水平维和垂直维、有远有近的所有用户的问题。
本发明实施例提供的具体技术方案如下:
本发明实施例提供了一种信干噪比确定方法,包括:
基站确定终端最近一次上报的所述终端对应的一个时频资源的CQI,所述CQI由所述终端根据CQI上报时刻前测量的干扰噪声以及最近一次被调度时接收的第一解调参考信号(demodulation reference signal,DMRS)对应的等效信道的信息估计得到,其中,所述第一DMRS为计算所述CQI采用的DMRS;
所述基站确定所述终端的所述第一DMRS的发送时刻在所述时频资源中与所述第一DMRS对应的数据层的第一等效信道的信息;
所述基站在下一调度时刻,确定所述终端的所述时频资源的每个数据层各自对应的第二等效信道的信息;
所述基站根据所述终端的所述第一等效信道的信息、所述时频资源的每个数据层各自对应的所述第二等效信道的信息以及所述CQI,确定下一调度 时刻所述终端的所述时频资源的每个数据层各自对应的第一SINR。
可能的实施方式中,所述基站确定所述终端的所述第一DMRS的发送时刻在所述时频资源中与所述第一DMRS对应的数据层的第一等效信道的信息,包括:
所述基站根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的预编码向量,根据所述信道矩阵以及所述预编码向量确定所述第一等效信道的信息;或者,
所述基站根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的赋形向量,根据所述信道矩阵以及所述赋形向量确定所述第一等效信道的信息。
可能的实施方式中,所述基站在下一调度时刻,确定所述终端的所述时频资源的每个数据层各自对应的第二等效信道的信息,包括:
所述基站根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的预编码向量,根据所述终端的所述时频资源的每个数据层各自的预编码向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息;
或者,
所述基站根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的赋形向量,根据所述终端的所述时频资源的每个数据层各自的赋形向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息。
可能的实施方式中,所述基站根据所述终端的所述第一等效信道的信息、所述时频资源的每个数据层各自对应的所述第二等效信道的信息以及所述CQI,确定下一调度时刻所述终端的所述时频资源的每个数据层各自对应的第一SINR,包括:
所述基站确定所述CQI对应的CQI上报时刻所述终端的所述时频资源的所述第一DMRS对应的数据层的第二SINR值;
所述基站分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的信息与所述第一等效信道的信息的增益,根据所得的增益与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
可能的实施方式中,所述基站分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的信息与所述第一等效信道的信息的增益,根据所得的增益与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值,包括:
所述基站分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的功率与所述第一等效信道的功率的比值,根据所得的比值与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
可能的实施方式中,所述第一DMRS为通过预设的DMRS端口传输的DMRS。
可能的实施方式中,所述预设的DMRS端口为所述基站与所述终端预先约定的DMRS端口。
本发明实施例中,基站确定终端最近一次上报的CQI,以及确定计算该CQI所采用的第一DMRS的发送时刻在时频资源中第一DMRS对应的数据层的第一等效信道的信息,并确定下一调度时刻该终端的该时频资源的每个数据层各自对应的第二等效消息的信息,根据该第一等效信道的信息、该时频资源的每个数据层各自对应的第二等效信道的信息以及该CQI,确定下一调 度时刻该终端的该时频资源的每个数据层各自对应的第一SINR,从而能够根据每个数据层各自的第一SINR较为准确地估计下一调度时刻向该终端发送数据所采用的MCS,提高吞吐量。
本发明实施例还提供了一种信道质量指示估计方法,包括:
终端根据接收的DMRS确定等效信道的信息;
所述终端在CQI上报时刻向基站上报估计得到的CQI,所述CQI为根据测量的干扰噪声以及最近一次被调度时接收的所述DMRS确定的等效信道的信息估计得到。
可能的实施方式中,所述最近一次被调度时接收的所述DMRS,为通过预设的DMRS端口接收的DMRS。
可能的实施方式中,所述预设的DMRS端口为所述终端与所述基站预先约定的DMRS端口。
本发明实施例中,终端根据基站发送的DMRS确定等效信道的信息,在上报CQI时刻向基站上报根据该等效信道的信息以及测量的干扰噪声估计的CQI,避免了利用CRS或CSI-RS测量CQI需要将CRS或CSI-RS覆盖到小区内分布在水平维和垂直维、有远有近的所有用户的问题,可以节省下行CRS、CSI-RS的开销。
本发明实施例还提供了一种基站,包括:
第一处理模块,用于确定终端最近一次上报的所述终端对应的一个时频资源的CQI,所述CQI由所述终端根据CQI上报时刻前测量的干扰噪声以及最近一次被调度时接收的第一DMRS对应的等效信道的信息估计得到,其中,所述第一DMRS为计算所述CQI采用的DMRS;
第二处理模块,用于确定所述终端的所述第一DMRS的发送时刻在所述时频资源中与所述第一DMRS对应的数据层的第一等效信道的信息;
第三处理模块,用于在下一调度时刻,确定所述终端的所述时频资源的每个数据层各自对应的第二等效信道的信息;
第四处理模块,用于根据所述终端的所述第一等效信道的信息、所述时 频资源的每个数据层各自对应的所述第二等效信道的信息以及所述CQI,确定下一调度时刻所述终端的所述时频资源的每个数据层各自对应的第一SINR。
可能的实施方式中,所述第二处理模块具体用于:
根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的预编码向量,根据所述信道矩阵以及所述预编码向量确定所述第一等效信道的信息;或者,
根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的赋形向量,根据所述信道矩阵以及所述赋形向量确定所述第一等效信道的信息。
可能的实施方式中,所述第三处理模块具体用于:
根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的预编码向量,根据所述终端的所述时频资源的每个数据层各自的预编码向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息;
或者,
根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的赋形向量,根据所述终端的所述时频资源的每个数据层各自的赋形向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息。
可能的实施方式中,所述第四处理模块具体用于:
确定所述CQI对应的CQI上报时刻所述终端的所述时频资源的所述第一 DMRS对应的数据层的第二SINR值;
分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的信息与所述第一等效信道的信息的增益,根据所得的增益与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
可能的实施方式中,所述第四处理模块具体用于:
分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的功率与所述第一等效信道的功率的比值,根据所得的比值与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
可能的实施方式中,所述第一DMRS为通过预设的DMRS端口传输的DMRS。
可能的实施方式中,所述预设的DMRS端口为所述基站与所述终端预先约定的DMRS端口。
本发明实施例还提供了一种终端,包括:
处理模块,用于根据接收的DMRS确定等效信道的信息;
上报模块,用于在CQI上报时刻向基站上报估计得到的CQI,所述CQI为根据测量的干扰噪声以及最近一次被调度时接收的所述DMRS确定的等效信道的信息估计得到。
可能的实施方式中,所述最近一次被调度时接收的所述DMRS,为通过预设的DMRS端口接收的DMRS。
可能的实施方式中,所述预设的DMRS端口为所述终端与所述基站预先约定的DMRS端口。
本发明实施例还提供了另一种终端,该终端主要包括处理器、存储器和收发机,其中,收发机用于在处理器的控制下接收和发送数据,存储器中保存有预设的程序,处理器用于读取存储器中保存的程序,按照该程序执行以下过程:
根据通过收发机接收的DMRS确定等效信道的信息;
在CQI上报时刻通过收发机向基站上报估计得到的CQI,所述CQI为根据测量的干扰噪声以及最近一次被调度时接收的所述DMRS确定的等效信道的信息估计得到。
可能的实施方式中,所述最近一次被调度时接收的所述DMRS,为通过预设的DMRS端口接收的DMRS。
可能的实施方式中,所述预设的DMRS端口为所述终端与所述基站预先约定的DMRS端口。
本发明实施例中还提供了另一种基站,该基站主要包括处理器、存储器和收发机,其中,收发机用于在处理器的控制下接收和发送数据,存储器中保存有预设的程序,处理器用于读取存储器中保存的程序,按照该程序执行以下过程:
确定终端最近一次上报的所述终端对应的一个时频资源的CQI,所述CQI由所述终端根据CQI上报时刻前测量的干扰噪声以及最近一次被调度时接收的第一DMRS对应的等效信道的信息估计得到,其中,所述第一DMRS为计算所述CQI采用的DMRS;
确定所述终端的所述第一DMRS的发送时刻在所述时频资源中与所述第一DMRS对应的数据层的第一等效信道的信息;
在下一调度时刻,确定所述终端的所述时频资源的每个数据层各自对应的第二等效信道的信息;
根据所述终端的所述第一等效信道的信息、所述时频资源的每个数据层各自对应的所述第二等效信道的信息以及所述CQI,确定下一调度时刻所述终端的所述时频资源的每个数据层各自对应的第一SINR。
可能的实施方式中,处理器根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的预编码向量,根据所述信道矩阵以及所述预编码向量确定 所述第一等效信道的信息;或者,
根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的赋形向量,根据所述信道矩阵以及所述赋形向量确定所述第一等效信道的信息。
可能的实施方式中,处理器根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的预编码向量,根据所述终端的所述时频资源的每个数据层各自的预编码向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息;
或者,
根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的赋形向量,根据所述终端的所述时频资源的每个数据层各自的赋形向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息。
可能的实施方式中,处理器确定所述CQI对应的CQI上报时刻所述终端的所述时频资源的所述第一DMRS对应的数据层的第二SINR值;
分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的信息与所述第一等效信道的信息的增益,根据所得的增益与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
可能的实施方式中,处理器分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的功率与所述第一等效信道的功率的比值,根据所得的比值与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
可能的实施方式中,所述第一DMRS为通过预设的DMRS端口传输的 DMRS。
可能的实施方式中,所述预设的DMRS端口为所述基站与所述终端预先约定的DMRS端口。
附图说明
图1为本发明实施例中终端进行CQI估计的方法流程示意图;
图2为本发明实施例中终端计算被调度时刻DMRS的等效信道的过程示意图;
图3为本发明实施例中基站确定SINR的方法流程示意图;
图4为本发明实施例中基站推导向终端发送DMRS时刻的第二SINR的过程示意图;
图5为本发明实施例中基站计算终端被调度时刻的第一等效信道的功率的过程示意图;
图6为本发明实施例中基站确定当前调度时刻终端的第一SINR的过程示意图;
图7为本发明实施例中终端结构示意图;
图8为本发明实施例中基站结构示意图;
图9为本发明实施例中另一终端结构示意图;
图10为本发明实施例中另一基站结构示意图。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明作进一步地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例,都属于本发明保护的范围。
本发明实施例终端估计并上报CQI的核心思想为:终端在被调度传输数据时测量预设的下行DMRS端口,计算该DMRS端口的等效信道的信息,在CQI上报时刻如果终端曾经被调度过或者正在被调度,则向基站报告根据测 量的干扰噪声以及最近一次被调度时该预设的DMRS端口的等效信道的信息进行估计得到的CQI。
在本发明第一实施例中,如图1所示,终端进行CQI估计的方法流程如下:
步骤101:终端根据接收的DMRS确定等效信道的信息。
实施中,终端接收基站每次在调度该终端传输数据时发送的DMRS,根据该DMRS确定等效信道的信息。
具体地,等效信道的信息包含收发天线之间的原始信道矩阵与预编码矩阵合成信息的等效信道的信息。
具体地,终端在被调度传输数据时,确定预设的DMRS端口接收的DMRS对应的等效信道的信息,根据该等效信道的信息以及测量的干扰噪声估计CQI。其中,预设的DMRS端口为终端与基站预先约定的DMRS端口。
例如,终端被调度传输数据的多个数据层对应的多个下行DMRS端口中,选择较低序号的下行DMRS端口为基站与该终端约定的下行DMRS端口。
步骤102:终端在CQI上报时刻向基站上报估计得到的CQI,该CQI为根据测量的干扰噪声以及最近一次被调度时接收的DMRS确定的等效信道的信息估计得到。
其中,终端的CQI上报时刻由基站通过信令指示,可以是周期性上报或非周期性上报。
具体地,终端在CQI上报时刻向基站上报的CQI,可以为终端在CQI上报时刻根据测量的干扰噪声以及最近一次被调度时接收的DMRS确定的等效信道的信息估计得到的CQI,也可以是为终端保存的CQI中,根据测量的干扰噪声以及最近一次被调度时接收的DMRS确定的等效信道的信息估计得到的CQI。
实施中,终端如果曾经被调度过或者正在被调度,在CQI上报时刻向基站上报测量的干扰噪声与最近一次被调度时预设的DMRS端口接收的DMRS对应的等效信道的信息估计得到的CQI。
实施中,终端按照基站的指示周期发送SRS。
一个具体实施例中,终端一旦被调度传输数据就基于与基站约定的下行DMRS端口的DMRS估计等效信道的信息。终端在CQI上报时刻,如果确定该终端从未被基站调度过,则向基站上报预设的初始CQI;如果确定该终端曾经被调度过或正在被调度,则向基站上报估计得到的CQI,该估计得到的CQI是根据该终端最近一次被调度时与基站约定的DMRS端口确定的等效信道,以及该终端最近一次被调度时刻或CQI上报时刻的前一段时间的平均干扰噪声得到的。
具体地,假设终端k根据最近一次被调度时预设的DMRS端口估计出的所有接收天线在资源单元RE(m,q)上的等效信道向量为
Figure PCTCN2016096577-appb-000001
其中l1表示预设的DMRS端口对应的数据层。若预设的DMRS端口在RE(m,q)上所采用的预编码向量为
Figure PCTCN2016096577-appb-000002
那么
Figure PCTCN2016096577-appb-000003
其中Hk(m,q)为基站的所有发射天线到终端k的所有接收天线之间的原始信道矩阵。由此可以基于预设的DMRS端口估计的等效信道向量计算RE(m,q)的SINR,表示为:
Figure PCTCN2016096577-appb-000004
其中σ2为干扰和噪声功率,例如σ2可以通过CRS测量获得,也可以是通过DMRS测量获得,也可以为本终端被调度时刻或CQI上报时刻的前一段时间的平均干扰噪声功率。
在上报CQI对应的时频资源上计算有效SINR:对该时频资源上各资源单元(resource element,RE)或各子载波的SINR按照某种方式进行计算得到有效SINR,计算方式例如指数有效SINR映射(Exponential Effective SINR Mapping,EESM)或互信息有效SINR映射(Mutual Information Effective SINR Mapping,MIESM)等。最后对得到的有效SINR进行量化得到该时频资源上的CQI。
如图2所示为该终端计算等效信道以及上报CQI的过程示意图,其中, D表示下行子帧,U表示上行子帧,S表示特殊子帧。基站在一个下行子帧中调度终端k,终端k在该下行子帧中接收DMRS,并根据与基站约定的DMRS端口接收的DMRS计算等效信道功率
Figure PCTCN2016096577-appb-000005
终端在CQI上报时刻到来之前,根据该终端最近一次被调度时与基站约定的DMRS端口接收的DMRS计算得到的等效信道功率以及CQI上报时刻的前一段时间的平均干扰噪声估计CQI,并上报该CQI。
本发明实施例中,终端根据基站发送的DMRS确定等效信道的信息,在上报CQI时刻向基站上报根据该等效信道的信息以及测量的干扰噪声估计的CQI,避免了利用CRS或CSI-RS测量CQI需要将CRS或CSI-RS覆盖到小区内分布在水平维和垂直维、有远有近的所有用户的问题,可以节省下行CRS、CSI-RS的开销,在预设的DMRS端口为一个时CQI反馈量小,并且由于DMRS是经过面向用户的预编码或波束赋形的,CQI测量的准确性非常高。
本发明第二实施例,如图3所示,基站确定信干噪比(Signal-to-Interference and Noise Ratio,SINR)的方法流程如下:
步骤301:基站确定终端最近一次上报的该终端对应的一个时频资源的CQI,该CQI由该终端根据CQI上报时刻前测量的干扰噪声以及最近一次被调度时接收的第一DMRS对应的等效信道的信息估计得到。
其中,第一DMRS为计算该CQI时采用的DMRS。
实施中,第一DMRS为通过预设的DMRS端口传输的DMRS。
具体地,该预设的DMRS端口为所述基站与所述终端预先约定的DMRS端口。
具体地,基站在向被调度终端传输数据时通过多个DMRS端口发送DMRS,其中一个DMRS端口为基站与终端约定的DMRS端口,该约定的DMRS端口用于终端确定等效信道并根据确定的该等效信道估计CQI。
步骤302:基站确定该终端的第一DMRS的发送时刻在该时频资源中与第一DMRS对应的数据层的第一等效信道的信息。
其中,与第一DMRS对应的数据层,即为传输第一DMRS的DMRS端口对应的数据层。
实施中,第一等效信道的信息具体可以为等效信道矩阵、等效信道功率等。
具体地,该时频资源为全系统带宽中分配给该终端的多个时频资源中的一个时频资源,对于分配给终端的其它时频资源的第一等效信道的信息的计算过程均与该过程相同,此处不再赘述。
实施中,基站基于终端发送的SRS估计该终端的信道矩阵。
具体地,基站通过测量各个终端的SRS接收信号,进行上行信道估计,并根据信道互易性得到各终端的下行信道矩阵。
具体地,第一等效信道的信息的确定过程为:
基站根据该终端的第一DMRS发送时刻前最近一次接收到的终端的SRS确定该时频资源的信道矩阵,并确定该终端的该第一DMRS的发送时刻时第一DMRS对应的数据层在该时频资源所使用的预编码向量,根据该信道矩阵以及该预编码向量确定该时频资源的第一等效信道的信息;
或者,
基站根据该终端的第一DMRS发送时刻前最近一次接收到的该终端的SRS确定该时频资源的信道矩阵,并确定该终端的该第一DMRS的发送时刻时第一DMRS对应的数据层在该时频资源所使用的赋形向量,根据该信道矩阵以及该赋形向量确定该时频资源的第一等效信道的信息。
步骤303:基站在下一调度时刻,确定该终端的该时频资源的每个数据层各自对应的第二等效信道的信息。
实施中,第二等效信道的信息可以为等效信道矩阵、等效信道功率等。
具体地,第二等效信道的信息的确定过程为:
基站根据在下一调度时刻之前最近一次接收到的终端的SRS确定该时频资源的信道矩阵,并确定该终端的该时频资源的每个数据层各自对应的预编码向量,根据该终端的该时频资源的每个数据层各自的预编码向量以及该信 道矩阵分别确定该时频资源的每个数据层各自对应的第二等效信道的信息;
或者,
基站根据在下一调度时刻之前最近一次接收到的终端的SRS确定该时频资源的信道矩阵,并确定该终端的该时频资源的每个数据层各自对应的赋形向量,根据该终端的该时频资源的每个数据层各自的赋形向量以及该信道矩阵分别确定该时频资源的每个数据层各自对应的第二等效信道的信息。
步骤304:基站根据该终端的第一等效信道的信息、该时频资源的每个数据层各自对应的第二等效信道的信息以及该CQI,确定下一调度时刻该终端的该时频资源的每个数据层各自对应的第一SINR。
具体地,基站根据该时频资源的每个数据层各自对应的第一SINR,确定下一调度时刻向该终端发送数据时所采用的调制编码方案(Modulation and Coding Scheme,MCS)。
实施中,基站确定下一调度时刻该终端的该时频资源的每个数据层各自对应的第一SINR的具体过程为:
基站确定该CQI对应的CQI上报时刻该终端的该时频资源的第一DMRS对应的数据层的第二SINR值;基站分别针对下一调度时刻该终端的该时频资源的每个数据层,计算该数据层的第二等效信道的信息与第一等效信道的信息的增益,根据所得的增益与第二SINR值的乘积确定该数据层对应的第一SINR值。
具体地,以等效信道的信息为等效信道的功率为例,基站分别针对下一调度时刻该终端的该时频资源的每个数据层,计算该数据层的第二等效信道的功率与第一等效信道的功率的比值,根据所得的比值与第二SINR值的乘积确定该数据层对应的第一SINR值。
一个具体实施例中,基站根据终端上报的CQI推导该时频资源的该预设的DMRS端口对应的数据层l1的第二SINR值,并保存推导获得的第二SINR值。具体地,如图4所示,基站在上行子帧n1时刻接收终端上报的CQI,根 据该CQI推导出终端k在预设的下行DMRS端口对应的数据层l1的第二SINR值
Figure PCTCN2016096577-appb-000007
同样,基站根据上行子帧n2时刻上报的CQI推导出终端k在预设的下行DMRS端口对应的数据层l1的第二SINR值
Figure PCTCN2016096577-appb-000008
基站调度终端并向该终端传输数据时,保存当前时刻该终端的预设下行DMRS端口对应的数据层的第一等效信道的功率。具体地,如图5所示,时刻n终端k的约定下行DMRS端口对应的数据层l1的第一等效信道的功率表示为:
Figure PCTCN2016096577-appb-000009
其中,
Figure PCTCN2016096577-appb-000010
表示时刻n终端k的预设下行DMRS端口对应的数据层l1的第一等效信道的功率,Hk(n-ΔnSRS)表示时刻n之前最近一次接收终端k的SRS的时刻根据该SRS测量的信道矩阵,ΔnSRS表示基站接收到终端k的SRS的时刻到当前调度时刻之间的时间差,
Figure PCTCN2016096577-appb-000011
表示时刻n终端k的预设下行DMRS端口对应的数据层l1采用的预编码或波束赋形向量。
如图6所示,基站推导终端k在下一调度时刻(时刻n,图中分别举例说明两个调度时刻n1和n2)每个数据层第一SINR的过程为:
基站保存的最近一次该终端上报的CQI对应的预设下行DMRS端口对应的数据层l1的第二SINR值,表示为:
Figure PCTCN2016096577-appb-000012
其中,n表示当前时刻,Δn表示基站最近一次接收终端k上报CQI的时刻到当前时刻之间的时间差;
基站保存的终端在上报CQI时刻上报的CQI所对应的被调度时刻预设下行DMRS端口对应的数据层的第一等效信道的功率,表示为:
Figure PCTCN2016096577-appb-000013
其中,n表示当前时刻,Δnp表示终端k上报CQI时刻上报的CQI所对应的被调度时刻到当前时刻之间的时间差;
基站计算的当前时刻终端各数据层的第二等效信道功率,表示为:
Figure PCTCN2016096577-appb-000014
其中,
Figure PCTCN2016096577-appb-000015
表示当前时刻n终端k的数据 层li采用的预编码或波束赋形向量;
计算当前时刻终端的各数据层的第一SINR,表示为:
Figure PCTCN2016096577-appb-000016
其中,
Figure PCTCN2016096577-appb-000017
为当前时刻n终端k的数据层li的第一SINR值,α表示SINR调整因子。其中,SINR调整因子可以是通过确认/否定确认(Acknowledgement/Negative Acknowledgement,ACK/NACK)报告自适应调整等方式得到的。
本发明实施例中,基站确定终端最近一次上报的CQI,以及确定计算该CQI所采用的第一DMRS的发送时刻在时频资源中第一DMRS对应的数据层的第一等效信道的信息,并确定下一调度时刻该终端的该时频资源的每个数据层各自对应的第二等效消息的信息,根据该第一等效信道的信息、该时频资源的每个数据层各自对应的第二等效信道的信息以及该CQI,确定下一调度时刻该终端的该时频资源的每个数据层各自对应的第一SINR,从而能够根据每个数据层各自的第一SINR较为准确地估计下一调度时刻向该终端发送数据所采用的MCS,提高吞吐量。
基于同一发明构思,本发明第三实施例中提供了一种终端,该终端的具体实施可参见上述方法实施例中的描述,重复之处不再赘述,如图7所示,该终端主要包括:
处理模块701,用于根据接收的DMRS确定等效信道的信息;
上报模块702,用于在CQI上报时刻向基站上报估计得到的CQI,所述CQI为根据测量的干扰噪声以及最近一次被调度时接收的所述DMRS确定的等效信道的信息估计得到。
实施中,所述最近一次被调度时接收的所述DMRS,为通过预设的DMRS端口接收的DMRS。
实施中,所述预设的DMRS端口为所述终端与所述基站预先约定的DMRS端口。
基于同一发明构思,本发明第四实施例中提供了一种基站,该基站的具体实施可参见上述方法实施例部分的描述,重复之处不再赘述,如图8所示,该基站主要包括:
第一处理模块801,用于确定终端最近一次上报的所述终端对应的一个时频资源的CQI,所述CQI由所述终端根据CQI上报时刻前测量的干扰噪声以及最近一次被调度时接收的第一DMRS对应的等效信道的信息估计得到,其中,所述第一DMRS为计算所述CQI采用的DMRS;
第二处理模块802,用于确定所述终端的所述第一DMRS的发送时刻在所述时频资源中与所述第一DMRS对应的数据层的第一等效信道的信息;
第三处理模块803,用于在下一调度时刻,确定所述终端的所述时频资源的每个数据层各自对应的第二等效信道的信息;
第四处理模块804,用于根据所述终端的所述第一等效信道的信息、所述时频资源的每个数据层各自对应的所述第二等效信道的信息以及所述CQI,确定下一调度时刻所述终端的所述时频资源的每个数据层各自对应的第一SINR。
实施中,第二处理模块802具体用于:
根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的预编码向量,根据所述信道矩阵以及所述预编码向量确定所述第一等效信道的信息;或者,
根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的赋形向量,根据所述信道矩阵以及所述赋形向量确定所述第一等效信道的信息。
实施中,第三处理模块具体用于:
根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时 频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的预编码向量,根据所述终端的所述时频资源的每个数据层各自的预编码向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息;
或者,
根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的赋形向量,根据所述终端的所述时频资源的每个数据层各自的赋形向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息。
实施中,第四处理模块具体用于:
确定所述CQI对应的CQI上报时刻所述终端的所述时频资源的所述第一DMRS对应的数据层的第二SINR值;
分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的信息与所述第一等效信道的信息的增益,根据所得的增益与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
具体地,第四处理模块具体用于:
分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的功率与所述第一等效信道的功率的比值,根据所得的比值与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
其中,所述第一DMRS为通过预设的DMRS端口传输的DMRS。
具体地,所述预设的DMRS端口为所述基站与所述终端预先约定的DMRS端口。
基于同一发明构思,本发明第五实施例中提供了一种终端,该终端的具体实施可参见上述方法实施例部分的描述,重复之处不再赘述,如图9所示, 该终端主要包括处理器901、存储器902和收发机903,其中,收发机903用于在处理器901的控制下接收和发送数据,存储器902中保存有预设的程序,处理器901用于读取存储器902中保存的程序,按照该程序执行以下过程:
根据通过收发机接收的DMRS确定等效信道的信息;
在CQI上报时刻通过收发机向基站上报估计得到的CQI,所述CQI为根据测量的干扰噪声以及最近一次被调度时接收的所述DMRS确定的等效信道的信息估计得到。
实施中,所述最近一次被调度时接收的所述DMRS,为通过预设的DMRS端口接收的DMRS。
实施中,所述预设的DMRS端口为所述终端与所述基站预先约定的DMRS端口。
其中,处理器、存储器和收发机之间通过总线连接,总线架构可以包括任意数量的互联的总线和桥,具体由处理器代表的一个或多个处理器和存储器代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机可以是多个元件,即包括发送机和收发机,提供用于在传输介质上与各种其他装置通信的单元。处理器负责管理总线架构和通常的处理,存储器可以存储处理器在执行操作时所使用的数据。
基于同一发明构思,本发明第六实施例中提供了一种基站,该基站的具体实施可参见上述方法实施例部分的描述,重复之处不再赘述,如图10所示,该基站主要包括处理器1001、存储器1002和收发机1003,其中,收发机1003用于在处理器1001的控制下接收和发送数据,存储器1002中保存有预设的程序,处理器1001用于读取存储器1002中保存的程序,按照该程序执行以下过程:
确定终端最近一次上报的所述终端对应的一个时频资源的CQI,所述CQI由所述终端根据CQI上报时刻前测量的干扰噪声以及最近一次被调度时接收 的第一DMRS对应的等效信道的信息估计得到,其中,所述第一DMRS为计算所述CQI采用的DMRS;
确定所述终端的所述第一DMRS的发送时刻在所述时频资源中与所述第一DMRS对应的数据层的第一等效信道的信息;
在下一调度时刻,确定所述终端的所述时频资源的每个数据层各自对应的第二等效信道的信息;
根据所述终端的所述第一等效信道的信息、所述时频资源的每个数据层各自对应的所述第二等效信道的信息以及所述CQI,确定下一调度时刻所述终端的所述时频资源的每个数据层各自对应的第一SINR。
实施中,处理器根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的预编码向量,根据所述信道矩阵以及所述预编码向量确定所述第一等效信道的信息;或者,
根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的赋形向量,根据所述信道矩阵以及所述赋形向量确定所述第一等效信道的信息。
实施中,处理器根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的预编码向量,根据所述终端的所述时频资源的每个数据层各自的预编码向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息;
或者,
根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的赋形向量,根据所述终端的所述时频资源的每个数据层各自的赋形向量以 及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息。
实施中,处理器确定所述CQI对应的CQI上报时刻所述终端的所述时频资源的所述第一DMRS对应的数据层的第二SINR值;
分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的信息与所述第一等效信道的信息的增益,根据所得的增益与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
具体地,处理器分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的功率与所述第一等效信道的功率的比值,根据所得的比值与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
其中,所述第一DMRS为通过预设的DMRS端口传输的DMRS。
具体地,所述预设的DMRS端口为所述基站与所述终端预先约定的DMRS端口。
其中,处理器、存储器和收发机之间通过总线连接,总线架构可以包括任意数量的互联的总线和桥,具体由处理器代表的一个或多个处理器和存储器代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起,这些都是本领域所公知的,因此,本文不再对其进行进一步描述。总线接口提供接口。收发机可以是多个元件,即包括发送机和收发机,提供用于在传输介质上与各种其他装置通信的单元。处理器负责管理总线架构和通常的处理,存储器可以存储处理器在执行操作时所使用的数据。
本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘 存储器和光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。

Claims (20)

  1. 一种信干噪比SINR确定方法,其特征在于,包括:
    基站确定终端最近一次上报的所述终端对应的一个时频资源的信道质量指示CQI,所述CQI由所述终端根据CQI上报时刻前测量的干扰噪声以及最近一次被调度时接收的第一解调参考信号DMRS对应的等效信道的信息估计得到,其中,所述第一DMRS为计算所述CQI采用的DMRS;
    所述基站确定所述终端的所述第一DMRS的发送时刻在所述时频资源中与所述第一DMRS对应的数据层的第一等效信道的信息;
    所述基站在下一调度时刻,确定所述终端的所述时频资源的每个数据层各自对应的第二等效信道的信息;
    所述基站根据所述终端的所述第一等效信道的信息、所述时频资源的每个数据层各自对应的所述第二等效信道的信息以及所述CQI,确定下一调度时刻所述终端的所述时频资源的每个数据层各自对应的第一SINR。
  2. 如权利要求1所述的方法,其特征在于,所述基站确定所述终端的所述第一DMRS的发送时刻在所述时频资源中与所述第一DMRS对应的数据层的第一等效信道的信息,包括:
    所述基站根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的探测参考信号SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的预编码向量,根据所述信道矩阵以及所述预编码向量确定所述第一等效信道的信息;或者,
    所述基站根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的赋形向量,根据所述信道矩阵以及所述赋形向量确定所述第一等效信道的信息。
  3. 如权利要求1所述的方法,其特征在于,所述基站在下一调度时刻,确定所述终端的所述时频资源的每个数据层各自对应的第二等效信道的信息,包括:
    所述基站根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的预编码向量,根据所述终端的所述时频资源的每个数据层各自的预编码向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息;
    或者,所述基站根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的赋形向量,根据所述终端的所述时频资源的每个数据层各自的赋形向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息。
  4. 如权利要求1所述的方法,其特征在于,所述基站根据所述终端的所述第一等效信道的信息、所述时频资源的每个数据层各自对应的所述第二等效信道的信息以及所述CQI,确定下一调度时刻所述终端的所述时频资源的每个数据层各自对应的第一SINR,包括:
    所述基站确定所述CQI对应的CQI上报时刻所述终端的所述时频资源的所述第一DMRS对应的数据层的第二SINR值;
    所述基站分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的信息与所述第一等效信道的信息的增益,根据所得的增益与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
  5. 如权利要求4所述的方法,其特征在于,所述基站分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的信息与所述第一等效信道的信息的增益,根据所得的增益与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值,包括:
    所述基站分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的功率与所述第一等效信道的功率的比值,根据所得的比值与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
  6. 如权利要求1-5任一项所述的方法,其特征在于,所述第一DMRS为通过预设的DMRS端口传输的DMRS。
  7. 如权利要求6所述的方法,其特征在于,所述预设的DMRS端口为所述基站与所述终端预先约定的DMRS端口。
  8. 一种信道质量指示估计方法,其特征在于,包括:
    终端根据接收的DMRS确定等效信道的信息;
    所述终端在CQI上报时刻向基站上报估计得到的CQI,所述CQI为根据测量的干扰噪声以及最近一次被调度时接收的所述DMRS确定的等效信道的信息估计得到。
  9. 如权利要求8所述的方法,其特征在于,所述最近一次被调度时接收的所述DMRS,为通过预设的DMRS端口接收的DMRS。
  10. 如权利要求9所述的方法,其特征在于,所述预设的DMRS端口为所述终端与所述基站预先约定的DMRS端口。
  11. 一种基站,其特征在于,包括:
    第一处理模块,用于确定终端最近一次上报的所述终端对应的一个时频资源的CQI,所述CQI由所述终端根据CQI上报时刻前测量的干扰噪声以及最近一次被调度时接收的第一DMRS对应的等效信道的信息估计得到,其中,所述第一DMRS为计算所述CQI采用的DMRS;
    第二处理模块,用于确定所述终端的所述第一DMRS的发送时刻在所述时频资源中与所述第一DMRS对应的数据层的第一等效信道的信息;
    第三处理模块,用于在下一调度时刻,确定所述终端的所述时频资源的每个数据层各自对应的第二等效信道的信息;
    第四处理模块,用于根据所述终端的所述第一等效信道的信息、所述时 频资源的每个数据层各自对应的所述第二等效信道的信息以及所述CQI,确定下一调度时刻所述终端的所述时频资源的每个数据层各自对应的第一SINR。
  12. 如权利要求11所述的基站,其特征在于,所述第二处理模块具体用于:
    根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的预编码向量,根据所述信道矩阵以及所述预编码向量确定所述第一等效信道的信息;或者,
    根据所述终端的所述第一DMRS发送时刻前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述第一DMRS的发送时刻时所述第一DMRS对应的数据层在所述时频资源所使用的赋形向量,根据所述信道矩阵以及所述赋形向量确定所述第一等效信道的信息。
  13. 如权利要求11所述的基站,其特征在于,所述第三处理模块具体用于:
    根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的预编码向量,根据所述终端的所述时频资源的每个数据层各自的预编码向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息;
    或者,根据在下一调度时刻之前最近一次接收到的所述终端的SRS确定所述时频资源的信道矩阵,并确定所述终端的所述时频资源的每个数据层各自对应的赋形向量,根据所述终端的所述时频资源的每个数据层各自的赋形向量以及所述信道矩阵分别确定所述时频资源的每个数据层各自对应的所述第二等效信道的信息。
  14. 如权利要求11所述的基站,其特征在于,所述第四处理模块具体用 于:
    确定所述CQI对应的CQI上报时刻所述终端的所述时频资源的所述第一DMRS对应的数据层的第二SINR值;
    分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的信息与所述第一等效信道的信息的增益,根据所得的增益与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
  15. 如权利要求14所述的基站,其特征在于,所述第四处理模块具体用于:
    分别针对下一调度时刻所述终端的所述时频资源的每个数据层,计算所述数据层的第二等效信道的功率与所述第一等效信道的功率的比值,根据所得的比值与所述第二SINR值的乘积确定所述数据层对应的所述第一SINR值。
  16. 如权利要求11-15任一项所述的基站,其特征在于,所述第一DMRS为通过预设的DMRS端口传输的DMRS。
  17. 如权利要求16所述的基站,其特征在于,所述预设的DMRS端口为所述基站与所述终端预先约定的DMRS端口。
  18. 一种终端,其特征在于,包括:
    处理模块,用于根据接收的DMRS确定等效信道的信息;
    上报模块,用于在CQI上报时刻向基站上报估计得到的CQI,所述CQI为根据测量的干扰噪声以及最近一次被调度时接收的所述DMRS确定的等效信道的信息估计得到。
  19. 如权利要求18所述的终端,其特征在于,所述最近一次被调度时接收的所述DMRS,为通过预设的DMRS端口接收的DMRS。
  20. 如权利要求19所述的终端,其特征在于,所述预设的DMRS端口为所述终端与所述基站预先约定的DMRS端口。
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