WO2017193808A1 - 信道质量反馈方法、用户终端、信道质量测量的控制方法及基站 - Google Patents

信道质量反馈方法、用户终端、信道质量测量的控制方法及基站 Download PDF

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Publication number
WO2017193808A1
WO2017193808A1 PCT/CN2017/081826 CN2017081826W WO2017193808A1 WO 2017193808 A1 WO2017193808 A1 WO 2017193808A1 CN 2017081826 W CN2017081826 W CN 2017081826W WO 2017193808 A1 WO2017193808 A1 WO 2017193808A1
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Prior art keywords
user
user terminal
port
base station
measurement
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PCT/CN2017/081826
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English (en)
French (fr)
Inventor
王新
那崇宁
侯晓林
蒋惠玲
柿岛佑一
永田聡
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株式会社Ntt都科摩
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Priority to JP2018548820A priority Critical patent/JP6917385B2/ja
Priority to CN201780028373.1A priority patent/CN109314587B/zh
Publication of WO2017193808A1 publication Critical patent/WO2017193808A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • 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
    • 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
    • H04B7/0417—Feedback systems
    • H04B7/0421—Feedback systems utilizing implicit feedback, e.g. steered pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication

Definitions

  • the present invention relates to communication technologies, and in particular, to a channel quality feedback method, a user terminal, a channel quality measurement control method, and a base station.
  • Multi-User Multiple-Input Multiple-Output MU-MIMO
  • CSI channel state information
  • MUI Multi-user Interference
  • MUI Multi-User Interference
  • Embodiments of the present invention provide a channel quality feedback method, a user terminal, a channel quality measurement control method, and a base station, and a program and a non-transitory machine readable storage medium, which are designed to improve channel quality feedback during multi-user transmission. Accuracy.
  • a channel quality feedback method includes:
  • the user equipment performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station;
  • the user terminal performs channel quality measurement when the second reference signal port performs multi-user scheduling, and the second measurement result is fed back to the base station.
  • a method of controlling channel quality measurement includes:
  • the base station notifies the user equipment (UE) to perform channel quality measurement on the first reference signal port by using the conventional configuration information, and receives the first measurement result fed back by the user terminal;
  • the base station performs multi-user scheduling according to the first measurement result, and when the user terminal is scheduled, sets a trigger condition of the second type measurement to be on, thereby triggering the user terminal to perform more on the second reference signal port.
  • a user terminal includes:
  • Non-volatile machine readable storage medium
  • program module is used to:
  • the channel quality measurement is performed when the second reference signal port performs multi-user scheduling, and the second measurement result is fed back to the base station.
  • a base station includes:
  • Non-volatile machine readable storage medium
  • program module is used to:
  • a program for causing a computer to:
  • the user terminal UE performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station;
  • the user terminal performs channel quality measurement when the second reference signal port performs multi-user scheduling, and the second measurement result is fed back to the base station.
  • a non-transitory machine-readable storage medium is provided, the machine readable instructions being stored in a storage medium, the machine readable instructions being executable by a processor to:
  • the user terminal UE performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station;
  • the user terminal performs channel quality measurement when the second reference signal port performs multi-user scheduling, and the second measurement result is fed back to the base station.
  • a program for causing a computer to:
  • the base station notifies the user terminal that the UE performs channel quality measurement on the first reference signal port by using the conventional configuration information, and receives the first measurement result fed back by the user terminal;
  • the base station performs multi-user scheduling according to the first measurement result, and when the user terminal is scheduled, sets a trigger condition of the second type measurement to be on, thereby triggering the user terminal to perform more on the second reference signal port. Channel quality measurement during user scheduling and The second measurement result is fed back.
  • a non-transitory machine-readable storage medium is provided, the machine readable instructions being stored in a storage medium, the machine readable instructions being executable by a processor to:
  • the base station notifies the user terminal that the UE performs channel quality measurement on the first reference signal port by using the conventional configuration information, and receives the first measurement result fed back by the user terminal;
  • the base station performs multi-user scheduling according to the first measurement result, and when the user terminal is scheduled, sets a trigger condition of the second type measurement to be on, thereby triggering the user terminal to perform more on the second reference signal port.
  • a user terminal includes:
  • a first measurement module configured to perform channel quality measurement on the first reference signal port, to obtain a first measurement result and feed back to the base station;
  • a second measurement module configured to detect whether a trigger condition of the second type of measurement is satisfied, and when the trigger condition is met, perform channel quality measurement when performing multi-user scheduling on the second reference signal port, and obtain a second measurement result and feed back to the base station .
  • a base station includes:
  • a first measurement control module configured to notify, by using the normal configuration information, that the user equipment UE performs channel quality measurement on the first reference signal port, and receives the first measurement result fed back by the user terminal;
  • a second measurement control module configured to perform multi-user scheduling according to the first measurement result, and set a trigger condition of the second type measurement to be open when the user terminal is scheduled, thereby triggering the user terminal to be in the second
  • the reference signal port performs channel quality measurement during multi-user scheduling and feeds back the second measurement result.
  • FIG. 1 is a schematic flowchart diagram of a method 100 for channel quality feedback according to an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart diagram of a method 200 for channel quality feedback according to an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of multi-user scheduling in an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart diagram of a method 400 for channel quality feedback according to an embodiment of the present invention.
  • FIG. 5 is a schematic flowchart diagram of a method 500 for channel quality feedback according to an embodiment of the present invention.
  • FIG. 6 is a schematic flowchart diagram of a method 600 for channel quality feedback according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart diagram of a method 700 for channel quality feedback according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart diagram of a method 800 for channel quality feedback according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart diagram of a method 900 for channel quality feedback according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart diagram of a method 1000 for channel quality feedback according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of transmission of multi-user CQI information bits according to an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of transmission of multi-user CQI information bits according to an embodiment of the present invention.
  • FIG. 13 is a schematic flowchart diagram of a method 1300 for channel quality feedback according to an embodiment of the present invention.
  • FIG. 14 is a schematic flowchart diagram of a method 1400 for channel quality feedback according to an embodiment of the present invention.
  • FIG. 15 is a schematic flowchart diagram of a method 1500 for controlling channel quality in an embodiment of the present invention.
  • FIG. 16 is a schematic flowchart diagram of a method 1600 for controlling channel quality in an embodiment of the present invention.
  • FIG. 17 is a schematic flowchart diagram of a method 1700 for controlling channel quality in an embodiment of the present invention.
  • FIG. 18 is a flowchart diagram of a method 1800 for controlling channel quality in an embodiment of the present invention. intention.
  • FIG. 19 is a schematic flowchart diagram of a method 1900 for controlling channel quality in an embodiment of the present invention.
  • FIG. 20 is a schematic structural diagram of a user terminal 2000 according to an embodiment of the present invention.
  • FIG. 21 is a schematic structural diagram of a base station 2100 according to an embodiment of the present invention.
  • FIG. 22 is a diagram showing an example of a hardware configuration of a radio base station and a user terminal according to an embodiment of the present invention.
  • the embodiment of the invention provides a channel quality measurement and feedback mechanism, which adds a second type of measurement to the user terminal, and uses the second reference signal port to perform channel quality measurement during multi-user scheduling to obtain multi-user interference ( MUI), thereby improving the accuracy of channel quality feedback when multi-user transmission.
  • the second type of measurement is controlled by a trigger condition and is aperiodic. For example, when the base station schedules a user terminal and finds that the data amount of the user terminal is large, the trigger condition may be set to be on, thereby starting a second type of measurement for the user terminal.
  • FIG. 1 is a schematic flowchart diagram of a method 100 for channel quality feedback according to an embodiment of the present invention.
  • the method 100 includes the following operations.
  • step 101 the user equipment (UE) performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station.
  • UE user equipment
  • the first reference signal port may be a regular channel state information pilot (CSI-RS) port, or may be a cell-specific reference signal (Cell-specific reference signal, CRS) port.
  • CSI-RS channel state information pilot
  • CRS cell-specific reference signal
  • the regular CSI-RS port is a CSI-RS port preset by the base station for the first type of measurement.
  • the first type of measurement is an existing measurement process, and may be a periodic measurement or a non-periodic measurement.
  • the obtained first measurement result carries a first CQI, and usually a single-user CQI is measured. That is, the measurement performed by the user terminal on the first reference signal port may be performed periodically under the configuration of the base station, or may be performed irregularly by the downlink control signaling of the base station. It should be noted that the first type of measurement acquires information on inter-cell interference.
  • step 102 it is detected whether the trigger condition of the second type of measurement is satisfied.
  • the user terminal performs channel quality measurement when the second reference signal port performs multi-user scheduling, and the second measurement result is fed back to Base station.
  • the second reference signal port can be a Demodulation Pilot (DMRS) port.
  • the second reference signal port can also be a set of pre-set user-specific CSI-RS ports for the second type of measurement.
  • the conventional CSI-RS port and the user-specific CSI-RS port are typically different and are not multiplexed.
  • one of the triggering conditions is that the user terminal receives its own data signal, that is, the user terminal is scheduled in the downlink transmission, and the second type of measurement performed at this time is measured by measuring the actual situation in the local cell. MUI gets a more accurate MU-CQI.
  • a new feedback mode can be agreed in advance between the base station and the user terminal.
  • the new feedback mode can be named mode 4-0 or mode 3-3.
  • the new feedback mode may include a sub-band MU-CQI for feeding back multi-user CQI obtained by DMRS port measurement or user-specific CSI-RS port measurement.
  • the new feedback mode may further include: a broadband MU-CQI.
  • the second DCI may be in DCI 2C or DCI 2D format for transmission Downlink grant (DL grant).
  • the resource allocation type is discrete (for example, the value of the resource allocation type is 1)
  • the user terminal averages all the sub-band MU-CQIs to obtain the broadband MU-CQI and feeds back to the base station.
  • the new feedback mode may include the same fields as mode 3-0 or mode 3-1 or mode 3-2 defined in the protocol TS36.213.
  • the first type of measurement and the second type of measurement described in FIG. 1 are two different types of measurement processes in data communication, and the order relationship between the two is not constrained.
  • the second type of measurement may be performed after the first type of measurement, or the first type of measurement may be performed after the second type of measurement, or the first type of measurement and the second type of measurement may occur simultaneously.
  • the first type of measurement and the second type of measurement are independent of each other, the first type of measurement is occurring periodically, and its occurrence time is not affected by the second type of measurement.
  • the second type of measurement is used as a supplement to the first type of measurement to improve the accuracy of the channel quality feedback.
  • FIG. 2 is a schematic flowchart diagram of a method 200 for channel quality feedback according to an embodiment of the present invention.
  • the method 200 includes the following operations.
  • step 201 the user terminal performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station.
  • the user terminal measures SU-CQI in the first type of measurement.
  • the user terminal detects whether the trigger condition of the second type of measurement is satisfied.
  • step 203 when the trigger condition is met, the user terminal calculates the total power of resource elements (REs) on all DMRS ports used in the current multi-user scheduling.
  • REs resource elements
  • channel estimation is performed on a DMRS port assigned to the user terminal to obtain signal power of the user terminal.
  • the precoding methods used by the CSI-RS port and the DMRS port are different. Compared with the CSI-RS port, the estimated signal power is more targeted on the DMRS port, and the estimation result is more accurate.
  • the user terminal obtains interference power based on the total power and the signal power.
  • the interference power is obtained by subtracting the total power from the signal power. Since the user terminal calculates the total power of all DMRS ports in the multi-user scheduling, the obtained interference power also includes the actual MUI in the current cell.
  • step 206 the user terminal obtains the second measurement result by using the signal power and the interference power, and sends the second measurement result to the base station.
  • the step of obtaining the second measurement result and feeding back to the base station includes: generating a multi-user CQI according to the signal power and the interference power, and adding the multi-user CQI to the second measurement result and sending the The base station.
  • a field may be set in the second measurement result for carrying the multi-user CQI.
  • the multi-user CQI includes a sub-band MU-CQI, and may further include a wideband MU-CQI.
  • the measurement window contains N TTIs.
  • the total power P SIN,k of the received signal on each sub-band is calculated according to equation (1).
  • channel estimation is performed on the second reference signal port (which may be a DMRS port or a user-specific CSI-RS port) of the user terminal based on the received signal and the reference signal transmission sequence agreed with the base station, to obtain a channel estimation result h k,m And calculate the signal power P S,k according to formula (2).
  • the second reference signal port which may be a DMRS port or a user-specific CSI-RS port
  • the SINR is calculated according to the formula (3), and the SINR is converted into units of dB.
  • the SINR k is quantized to a discrete value according to a prescribed quantization rule.
  • the SINR k can be quantized to a 27-order discrete value, and the corresponding CQI values are 0-26.
  • P SIN,k contains signal power, noise power and interference power from other cells; for the second type of measurement, P SIN,k further includes other users from the community. The interference power of the terminal.
  • the corresponding CQI is the subband CQI.
  • the SINR on each subband can be averaged to obtain a wideband SINR, and then the wideband SINR can be quantized to obtain a wideband CQI.
  • the MU-CQI can also be calculated using the methods described below.
  • the user estimates channel conditions of other user terminals based on the received signal and the reference signal sequence of other user terminals, and the obtained channel estimation result is P is the number of users when the base station performs multi-user scheduling, and the number of users is notified to the user by the base station through downlink signaling.
  • the user terminal calculates interference power at the time of multi-user scheduling according to formula (4), and measures inter-cell interference and noise power P IN,k .
  • the user terminal can measure P IN,k based on a zero power reference signal. On the zero power reference signal, the base station of the user terminal does not transmit power.
  • the user terminal calculates a multi-user SINR according to formula (5), and quantizes the multi-user SINR to obtain a MU-CQI.
  • the multi-user SINR can be quantized to a set order, such as 27th-order quantization, and the corresponding MU-CQI has a sequence number of 0-26.
  • the SNR of the K subbands can be averaged and quantized.
  • the first type of measurement and the second type of measurement are simultaneously triggered, and the step of obtaining the second measurement result and feeding back to the base station according to step 206 includes: generating a multi-user CQI according to the signal power and the interference power, and After the first CQI in the measurement result is modified to the multi-user CQI, it is sent to the base station, thereby reducing the overhead of the entire measurement feedback. That is, in this example, there is no need to add a new field in the measurement feedback, but an existing field is used to carry the multi-user CQI.
  • the user terminal can also feed back the first CQI and the multi-user CQI to the base station simultaneously.
  • the obtaining, by the step 206, that the second measurement result is fed back to the base station comprises: generating a multi-user CQI according to the signal power and the interference power, and determining a first between the first CQI and the multi-user CQI And offsetting, the first CQI and the first offset are sent to the base station. Assuming that the first CQI is 7, the multi-user If the CQI is 15, it is determined that the first offset is 8.
  • the first CQI is obtained from a first type of measurement, which may be performed concurrently with the second type of measurement, or may occur prior to the second type of measurement.
  • the obtaining, by the step 206, that the second measurement result is fed back to the base station comprises: generating a multi-user CQI according to the signal power and the interference power, obtaining a modulation and coding strategy (MCS) indication from the second DCI, and determining The MCS indicates a second offset from the multi-user CQI, and the MCS indication and the second offset are sent to the base station.
  • MCS modulation and coding strategy
  • the MCS indication is 11
  • the multi-user CQI is 13
  • the second offset is two.
  • UE1 measures CSI-RS signals on a regular CSI-RS port when subframes 1-5, and UE1 gives corresponding CSI-RS feedback at subframe 7.
  • UE2, UE3, UE4, UE5 are scheduled on the downlink.
  • UE4, UE5, UE6, UE7 are scheduled on the downlink.
  • UE1, UE3, UE5, and UE7 are scheduled on the downlink, and UE1 performs measurement on the DMRS port.
  • UE1 feeds back the second measurement on the DMRS port to the base station.
  • UE1, UE3, UE5, UE7 are scheduled on the downlink.
  • the feedback given by UE1 in subframe 14 can better guide the user scheduling of subframe 16.
  • FIG. 4 is a schematic flowchart diagram of a method 400 for channel quality feedback according to an embodiment of the present invention.
  • the method 400 includes the following operations.
  • step 401 the user terminal performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station.
  • the user terminal detects whether the trigger condition of the second type of measurement is satisfied.
  • step 403 when the trigger condition is met, it is assigned to the user terminal.
  • Channel estimation is performed on the DMRS port to obtain the signal power of the user terminal.
  • step 404 channel estimation is performed on the DMRS ports allocated by other user terminals that are jointly scheduled by the user terminal to obtain interference power.
  • the user terminal is UE1, and the user terminal on the current multi-user scheduling includes: UE1, UE3, UE5, and UE7, and UE1 performs channel estimation on the DMRS ports of UE3, UE5, and UE7, and obtains UE3.
  • the base station notifies the user terminal of the number of layers of the data transmission layer on the current multi-user scheduling by using the second DCI, so that the user terminal knows how many DMRS ports need to perform channel estimation when determining the interference power. .
  • step 405 the user terminal obtains the second measurement result by using the signal power and the interference power, and sends the second measurement result to the base station.
  • FIG. 5 is a schematic flowchart diagram of a method 500 for channel quality feedback according to an embodiment of the present invention.
  • the method 500 includes the following operations.
  • step 501 the user terminal performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station.
  • step 502 the data signal of the other user terminals scheduled to be jointly scheduled by the base station and sent by the base station on the zero power (ZP) CSI-RS port of the user terminal is received.
  • ZP zero power
  • the base station allocates the RE of the zero-power CSI-RS port to the user terminal in the current multi-user scheduling, and the RE positions of the different user terminals on the zero-power CSI-RS port are different.
  • the base station does not transmit the data signal of the user terminal on the RE of the zero-power CSI-RS port of one user terminal, but transmits the data signals of other user terminals that are jointly scheduled.
  • the user terminal detects whether the trigger condition of the second type of measurement is satisfied.
  • step 504 when the trigger condition is met, channel estimation is performed on the DMRS port of the user terminal, and the signal power of the user terminal is obtained.
  • step 505 the user terminal measures interference power on the RE allocated to itself in the ZP CSI-RS port, thereby obtaining an actual MUI.
  • the user terminal unlike the user terminal, other user terminals that are jointly scheduled regard the signal received on the RE as a data signal. That is, in multi-user scheduling, the REs allocated by the base station to each user terminal on the ZP CSI-RS port are different, and the user terminal performs interference power measurement on its own RE in the ZP CSI-RS port. In addition, the user terminal regards the signals transmitted on the REs of other user terminals in the ZP CSI-RS port as data channels and demodulates the data signals transmitted on the REs.
  • step 506 the user terminal obtains the second measurement result by using the signal power and the interference power, and sends the second measurement result to the base station.
  • FIG. 6 is a schematic flowchart diagram of a method 600 for channel quality feedback according to an embodiment of the present invention.
  • the method 600 includes the following operations.
  • step 601 the user terminal performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station.
  • the base station selects one or more first user-specific CSI-RS ports from a set of preset user-specific CSI-RS ports, and the first is performed by using first downlink control information (DCI).
  • DCI downlink control information
  • a user-specific CSI-RS port is indicated to the user terminal.
  • the user terminal receives the first DCI carrying the indication information of the first user-specific CSI-RS port.
  • the base station may select one of the user-specific CSI-RS ports from the first user-specific CSI-RS port or two first user-specific CSI-RS ports.
  • the indication information of the first user-specific CSI-RS port may be carried on In the line grant (UL grant). It should be noted that the user-specific CSI-RS port may be agreed in advance between the base station and the user terminal, or the base station may notify the user terminal by using a preset user-specific CSI-RS port through upper layer signaling.
  • the user terminal detects whether the trigger condition of the second type of measurement is satisfied.
  • the signal power of the user terminal is measured on the first user-specific CSI-RS port.
  • step 605 the total power of all REs on the set of user-specific CSI-RS ports is calculated.
  • interference power is obtained based on the total power and the signal power. It can be seen that since the user terminal calculates the total power on all user-specific CSI-RS ports, the interference power obtained in step 606 includes the actual MUI in the current cell.
  • step 607 the user terminal obtains the second measurement result by using the signal power and the interference power, and sends the second measurement result to the base station.
  • FIG. 7 is a schematic flowchart diagram of a method 700 for channel quality feedback according to an embodiment of the present invention.
  • the method 700 includes the following operations.
  • step 701 the user terminal performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station.
  • the base station selects one or more first user-specific CSI-RS ports from the preset user-specific CSI-RS ports, and indicates the first user-specific CSI-RS port by using the first DCI.
  • the user terminal receives the first DCI carrying indication information of the first user-specific CSI-RS port.
  • the user terminal detects whether the trigger condition of the second type of measurement is satisfied.
  • the signal power of the user terminal is measured on the first user-specific CSI-RS port.
  • channel estimation is performed at the second user-specific CSI-RS port to obtain interference power.
  • the second user-specific CSI-RS port is one or more other user-specific CSIs other than the first user-specific CSI-RS port in the preset user-specific CSI-RS port. -RS port. For example, if there are 8 user-specific CSI-RS ports set in advance, and there are 2 CSI-RS ports for the first user, there may be a maximum of 6 CSI-RS ports for the second user.
  • the base station may notify the user terminal of the number of actually used user-specific CSI-RS ports by using the second DCI, so that the user terminal knows how many second user-specific CSI-RSs are needed when determining the interference power. Channel estimation is performed on the port.
  • the number of actually used user-specific CSI-RS ports may be less than the number of user-specific CSI-RS ports set in advance. For example, if there are two second user-specific CSI-RS ports, the number of user-specific CSI-RS ports actually used is four.
  • step 706 the user terminal obtains the second measurement result by using the signal power and the interference power, and sends the second measurement result to the base station.
  • FIG. 8 is a schematic flowchart diagram of a method 800 for channel quality feedback according to an embodiment of the present invention.
  • the method 800 includes the following operations.
  • step 801 the user terminal performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station.
  • the user terminal selects one or more first user-specific CSI-RS ports from pre-set user-specific CSI-RS ports.
  • the user terminal may notify the base station of the first user-specific CSI-RS port. Different from step 702, since the first user-specific CSI-RS port in step 802 is selected by the user terminal, the base station does not have to add the first in the UL grant. Information indicating the user-specific CSI-RS port.
  • the user terminal detects whether the trigger condition of the second type of measurement is satisfied.
  • the signal power of the user terminal is measured on the first user-specific CSI-RS port.
  • step 805 the total power of all REs on the pre-set user-specific CSI-RS port is calculated.
  • interference power is obtained based on the total power and the signal power.
  • step 807 the user terminal obtains the second measurement result by using the signal power and the interference power, and sends the second measurement result to the base station.
  • FIG. 9 is a schematic flowchart diagram of a method 900 for channel quality feedback according to an embodiment of the present invention.
  • the method 900 includes the following operations.
  • step 901 the user terminal performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station.
  • step 902 the user terminal selects one or more first user-specific CSI-RS ports from a preset set of user-specific CSI-RS ports, and notifies the first user-specific CSI-RS port Base station.
  • step 903 the user terminal detects whether the trigger condition of the second type of measurement is satisfied.
  • the signal power of the user terminal is measured on the first user-specific CSI-RS port.
  • channel estimation is performed at the second user-specific CSI-RS port to obtain interference power.
  • the second user-specific CSI-RS port is one or more other user-specific CSIs other than the first user-specific CSI-RS port in the preset user-specific CSI-RS port. -RS port.
  • the user terminal obtains by using the signal power and the interference power
  • the second measurement result is sent to the base station.
  • FIG. 10 is a schematic flowchart diagram of a method 1000 for channel quality feedback according to an embodiment of the present invention.
  • the method 1000 includes the following operations.
  • step 1001 the user terminal performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station.
  • step 1002 the user terminal reads the user-specific high layer signaling or the multi-user CQI information bit carried in the first DCI.
  • the user-specific high-level signaling is Radio Resource Control (RRC) signaling
  • RRC Radio Resource Control
  • a multi-user CQI parameter is added in the RRC signaling, and the multi-user CQI parameter is set to ON (ON). ) or OFF (OFF).
  • the first DCI is PUSCH feedback information in a format of DCI 4.
  • one bit may be added to the DCI 4 as the multi-user CQI information bit.
  • the DCI 4 may further add 3 bits for indicating the number of layers of the data transmission layer scheduled by the multi-user.
  • step 1003 it is determined whether to perform the second type of measurement according to the multi-user CQI information bit.
  • the multi-user CQI information bit has a value of 1, it indicates that the second type of measurement needs to be performed and the multi-user CQI is fed back.
  • the user terminal detects whether it receives its own data signal.
  • step 1005 if the data signal is received, the user terminal performs channel quality measurement when the second reference signal port performs multi-user scheduling, and the second measurement result is fed back to the base station.
  • the second reference signal port may be a DMRS port or a user-specific CSI-RS port. It should be noted that the operation of step 1005 can refer to the figure. Description of 2-9.
  • the base station sends a first DCI, a second DCI, and a PDSCH data signal to the UE1, where the first DCI carries a multi-user CQI information bit, and in the subframe 14, the UE1 feeds back the first CQI and the first Offset.
  • the first DCI and the second DCI may occupy the same time resource. It should be noted that the case of subframes 1-10 can be referred to FIG. 3, which is not shown in FIG.
  • the base station sends a first DCI to UE1, the first DCI carries a multi-user CQI information bit, and in subframe 11 the base station sends a second DCI and PDSCH data signal to UE1. Since UE1 receives its own data signal at subframe 11, it is triggered to perform measurement at the DMRS port. At subframe 14, UE1 feeds back the first CQI and the first offset to the base station according to the second type of measurement. It should be noted that the case of subframes 1-9 can be referred to FIG. 3, which is not shown in FIG.
  • FIG. 13 is a schematic flowchart diagram of a method 1300 for channel quality feedback according to an embodiment of the present invention.
  • the method 1300 includes the following operations.
  • step 1301 the user terminal performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station.
  • the base station sends a third DCI for indicating physical uplink shared channel (PUSCH) feedback information and physical downlink shared channel (PDSCH) transmission information.
  • the third DCI is a newly designed DCI for transmitting PUSCH feedback information and PDSCH transmission information at the same time, so that the user terminal only needs to perform DCI analysis once, and can obtain two types of information: uplink and downlink.
  • the third DCI combines the same fields in DCI 4 and DCI 2C/2D to reduce DCI overhead.
  • step 1303 the user terminal reads the multi-user CQI information bit carried in the third DCI.
  • the user terminal detects whether it receives its own data signal.
  • step 1305 if the data signal is received, the user terminal performs channel quality measurement when the second reference signal port performs multi-user scheduling, and the second measurement result is fed back to the base station.
  • the detecting, by the user terminal, whether the user equipment receives the data signal of the step 1004 or the step 1304 includes: when the user terminal receives the multi-user CQI information bit in the subframe n, determining whether the user terminal is in the The data signal is received between the subframe (n-k1) and the subframe (n+k2), and if received, it is determined that the trigger condition is satisfied, wherein k1 is greater than or equal to (-k2), and the k2 is greater than or equal to 0.
  • the user terminal feeds back the second measurement result in a subframe (n+k3), where k3 is greater than k2.
  • k3-k2>2 that is, the time required to reserve no less than 2 subframes for the user terminal for data parsing.
  • FIG. 14 is a schematic flowchart diagram of a method 1400 for channel quality feedback according to an embodiment of the present invention.
  • the method 1400 includes the following operations.
  • step 1401 the user terminal performs channel quality measurement on the first reference signal port, and obtains a first measurement result and feeds back to the base station.
  • the user terminal determines whether a second DCI is received.
  • the second DCI is used to indicate physical downlink shared channel (PDSCH) transmission information.
  • PDSCH physical downlink shared channel
  • step 1403 upon receiving the second DCI, it is determined whether there is a CSI-RS feedback timing in the measurement window.
  • the frame is subframe n, and the measurement window is between (n-k1) and (n+k2), and one or more subframes may be continued, where k1 is greater than or equal to (-k2) and k2 is greater than or equal to zero.
  • the user terminal performs channel quality measurement on the second reference signal port for multi-user scheduling, and the second measurement result is reported to the base station.
  • the second reference signal port is a DMRS port
  • the second measurement result is DMRS feedback.
  • the DMRS feedback may include a subband MU-CQI, and may further include a wideband MU-CQI, and/or a field defined in mode 3-0 or mode 3-1 or mode 3-2.
  • the sub-band MU-CQI is calculated as follows: determining signal power of the user terminal on each sub-band and estimating interference power of the user terminal on each sub-band according to the signal power on each sub-band The ratio of the interference power determines a multi-user SINR on the sub-band, and the multi-user CQI on the sub-band is obtained according to the multi-user SINR.
  • the wideband MU-CQI is calculated as follows: when determining a broadband multi-user CQI of the user terminal according to a resource allocation type received from the base station, averaging and multi-user SINR on all sub-bands , get broadband multi-user CQI.
  • the triggering condition of step 102 is that the user terminal is scheduled and the user terminal has an opportunity to perform CSI-RS feedback within the measurement window.
  • the user terminal is configured to periodically perform CSI-RS feedback.
  • FIG. 15 is a schematic flowchart diagram of a method 1500 for controlling channel quality in an embodiment of the present invention.
  • the method 1500 includes the following operations.
  • the base station notifies the user equipment UE to perform channel quality measurement on the first reference signal port by using the conventional configuration information, and receives the first measurement result fed back by the user terminal.
  • the base station may perform multi-user scheduling according to the first measurement result.
  • step 1502 when the user terminal is scheduled, the base station sets the trigger condition of the second type measurement to be on, thereby triggering channel quality measurement and feedback of the user terminal when performing multi-user scheduling on the second reference signal port. Second measurement result.
  • setting the trigger condition of the second type of measurement to open according to step 1502 includes: adding, by the base station, a multi-user CQI information bit in user-specific high-layer signaling or the first DCI, and adding the multi-user CQI information After the bit is set to be turned on, it is sent to the user terminal for triggering the user terminal to perform the second type of measurement.
  • the first DCI is used to indicate physical uplink shared channel PUSCH feedback information.
  • the setting, by the step 1502, the triggering condition of the second type of measurement to be opened includes: the base station constructing a third DCI configured to indicate physical uplink shared channel PUSCH feedback information and physical downlink shared channel PDSCH transmission information, and After the multi-user CQI information bit of the third DCI is set to be turned on, it is sent to the user terminal, and is used to trigger the user terminal to perform the second type of measurement.
  • FIG. 16 is a schematic flowchart diagram of a method 1600 for controlling channel quality in an embodiment of the present invention.
  • the method 1600 includes the following operations.
  • step 1601 the base station notifies the user terminal UE of the channel quality measurement at the first reference signal port by using the conventional configuration information, and receives the first measurement result fed back by the user terminal. At this point, the base station initiates the first type of measurement.
  • step 1602 when the user equipment is scheduled, the base station sets a trigger condition of the second type of measurement to be on, thereby triggering channel quality measurement and feedback of the user terminal when performing multi-user scheduling on the second reference signal port. Second measurement result.
  • the base station determines an RE allocated to the user terminal in a zero-power CSI-RS port, and transmits other users scheduled to be jointly scheduled with the user terminal on the RE.
  • the data signal of the terminal causes the user terminal to measure the interference power on the RE allocated to itself, and causes other user terminals jointly scheduled with the user terminal to receive the data signal on the RE.
  • FIG. 17 is a schematic flowchart diagram of a method 1700 for controlling channel quality in an embodiment of the present invention.
  • the method 1700 includes the following operations.
  • step 1701 the base station notifies the user terminal UE of the channel quality measurement at the first reference signal port by using the conventional configuration information, and receives the first measurement result fed back by the user terminal.
  • the base station sets the trigger condition of the second type of measurement to be on when the user terminal is scheduled.
  • the base station pre-divides a set of user-specific CSI-RS ports from the CSI-RS port as a second reference signal port, and triggers a channel when the user terminal performs multi-user scheduling on the second reference signal port. Quality measurement. In one example, after the user terminal is triggered, the total power of all REs on the user-specific CSI-RS port is calculated.
  • the base station selects one or more first user-specific CSI-RS ports from the user-specific CSI-RS ports, and the first user-specific CSI-RS port by using the first downlink control information DCI. Indicated to the user terminal for the user terminal to measure signal power on the first user-specific CSI-RS port.
  • the first DCI is used to indicate physical uplink shared channel PUSCH feedback information.
  • FIG. 18 is a schematic flowchart diagram of a method 1800 for controlling channel quality in an embodiment of the present invention.
  • the method 1800 includes the following operations.
  • step 1801 the base station notifies the user terminal UE of the first parameter by using the conventional configuration information.
  • the test signal port performs channel quality measurement and receives the first measurement result fed back by the user terminal.
  • the base station may perform multi-user scheduling according to the first measurement result.
  • step 1802 when the user equipment is scheduled, the base station sets a trigger condition of the second type of measurement to be on, thereby triggering channel quality measurement and feedback of the user terminal when performing multi-user scheduling on the second reference signal port. Second measurement result.
  • the base station receives the second measurement result sent by the user terminal, obtains a first CQI and a first offset from the base station, and restores according to the first CQI and the first offset. Multi-user CQI.
  • FIG. 19 is a schematic flowchart diagram of a method 1900 for controlling channel quality in an embodiment of the present invention.
  • the method 1900 includes the following operations.
  • the base station notifies the user equipment UE to perform channel quality measurement on the first reference signal port by using the conventional configuration information, and receives the first measurement result fed back by the user terminal.
  • the base station may perform multi-user scheduling according to the first measurement result.
  • step 1902 when the user equipment is scheduled, the base station sets a trigger condition of the second type of measurement to be on, thereby triggering channel quality measurement and feedback of the user terminal when performing multi-user scheduling on the second reference signal port. Second measurement result.
  • the base station receives the second measurement result sent by the user terminal, obtains an MCS indication and a second offset from the base station, and restores multiple users according to the MCS indication and the second offset. CQI.
  • the present application also discloses a program for causing a computer to execute the method shown in FIGS. 1, 2, 4-10, 13-19 and a non-transitory machine-readable storage medium storing the program.
  • FIG. 20 is a schematic structural diagram of a user terminal 2000 according to an embodiment of the present invention.
  • the user terminal 2000 includes: a processor 2001, a non-volatile machine readable storage medium 2002; and a program stored in the non-transitory machine readable storage medium 2002, executed by the processor 2001 Module 2003.
  • the program module 2003 is configured to: perform channel quality measurement on the first reference signal port, obtain a first measurement result and feed back to the base station; and detect whether the trigger condition of the second type measurement is satisfied, when the trigger condition is met.
  • the channel quality measurement is performed when the second reference signal port performs multi-user scheduling, and the second measurement result is fed back to the base station.
  • the program module 2003 includes a first measurement module 2013 and a second measurement module 2023.
  • the first measurement module 2013 is configured to perform channel quality measurement on the first reference signal port, and obtain a first measurement result and feed back to the base station.
  • the second measurement module 2023 is configured to detect whether the trigger condition of the second type of measurement is satisfied, and when the trigger condition is met, perform channel quality measurement when performing multi-user scheduling on the second reference signal port, and obtain feedback of the second measurement result. To the base station.
  • the program module 2003 is configured to: calculate a total power of resource elements RE on all DMRS ports used by the multi-user scheduling; perform channel estimation on a DMRS port allocated to the user terminal, obtain the user The signal power of the terminal; and the interference power is obtained based on the total power and the signal power.
  • the program module 2003 is configured to: perform channel estimation on a DMRS port allocated to the user terminal, obtain signal power of the user terminal; and assign to other user terminals scheduled in conjunction with the user terminal The channel estimation is performed on the DMRS port to obtain interference power.
  • the program module 2003 is configured to: receive, by the base station, a data signal of another user terminal scheduled to be jointly scheduled by the user terminal and sent by the user terminal in the zero-power CSI-RS port; And the DMRS port allocated to the user terminal performs channel estimation to obtain signal power of the user terminal; and the user terminal measures interference power on the RE allocated to the self in the zero-power CSI-RS port.
  • the program module 2003 is configured to: receive, by the base station, indication information of one or more first user-specific CSI-RS ports provided by the first downlink control information DCI, the first user-specific CSI - the RS port is selected by the base station from the preset user-specific CSI-RS ports; wherein the first DCI is used to indicate physical uplink shared channel PUSCH feedback information; in the first user-specific CSI- The signal power of the user terminal is measured on the RS port; the total power of all REs on the preset user-specific CSI-RS port is calculated, and the interference power is obtained according to the total power and the signal power.
  • the program module 2003 is configured to: receive, by the base station, indication information of one or more first user-specific CSI-RS ports provided by the first downlink control information DCI, the first user-specific CSI - the RS port is selected by the base station from the preset user-specific CSI-RS ports; wherein the first DCI is used to indicate physical uplink shared channel PUSCH feedback information; in the first user-specific CSI- Measuring the signal power of the user terminal on the RS port; performing channel estimation on the second user-specific CSI-RS port to obtain the interference power, and the second user-specific CSI-RS port is the preset user-specific CSI- One or more other user-specific CSI-RS ports other than the first user-specific CSI-RS port are removed from the RS port.
  • the program module 2003 is configured to: select one or more first user-specific CSI-RS ports from the preset user-specific CSI-RS ports, and at the first user-specific CSI - measuring the signal function of the user terminal on the RS port Rate; calculating a total power of all REs on the preset user-specific CSI-RS port, and obtaining interference power according to the total power and the signal power.
  • the program module 2003 is configured to: select one or more first user-specific CSI-RS ports from the preset user-specific CSI-RS ports, and at the first user-specific CSI Measuring the signal power of the user terminal on the RS port; performing channel estimation on the second user-specific CSI-RS port to obtain the interference power, and the second user-specific CSI-RS port is the preset user-specific CSI One or more other user-specific CSI-RS ports other than the first user-specific CSI-RS port are removed from the RS port.
  • the program module 2003 is configured to: generate a multi-user channel quality indication CQI according to the signal power and the interference power; add the multi-user CQI to the second measurement result, and send the Or the base station; or, after modifying the first CQI in the first measurement result to the multi-user CQI, sending the signal to the base station.
  • the program module 2003 is configured to: generate a multi-user CQI according to the signal power and the interference power; determine a first offset between the first CQI and the multi-user CQI, and The first CQI and the first offset are sent to the base station.
  • the program module 2003 is configured to: generate a multi-user CQI according to the signal power and the interference power; obtain a modulation and coding policy MCS indication from the second DCI, determine the MCS indication and the multiple a second offset between the user CQIs; wherein the second DCI is used to indicate physical downlink shared channel PDSCH transmission information; and the MCS indication and the second offset are sent to the base station.
  • the program module 2003 is configured to: read user-specific high layer signaling or a multi-user CQI information bit carried in the first DCI; wherein the first DCI And used to indicate physical uplink shared channel PUSCH feedback information; when the multi-user CQI information bit indicates that multi-user CQI measurement is required, whether to receive its own data signal is detected; if it is received, it is determined that the trigger condition is met.
  • the program module 2003 is configured to: receive a third DCI sent by the base station, where the third DCI is used to indicate physical uplink shared channel PUSCH feedback information and physical downlink shared channel PDSCH transmission information; The multi-user CQI information bit carried in the third DCI; when the multi-user CQI information bit indicates that multi-user CQI measurement is required, detecting whether the data signal of itself is received; if it is received, determining that the trigger condition is satisfied.
  • the program module 2003 is configured to: determine, when the multi-user CQI information bit is received in the subframe n, whether the user terminal is in a subframe (n-k1) to a subframe (n+k2) Receiving the data signal, if it is received, determining that the trigger condition is satisfied; wherein k1 is greater than or equal to (-k2), and k2 is greater than or equal to 0; wherein the user terminal is in a subframe (n +k3) feeding back the second measurement, where k3 is greater than k2.
  • the program module 2003 is configured to determine, when the second DCI is received, whether there is a CSI-RS feedback opportunity in the measurement window, where the second DCI is used to indicate the physical downlink shared channel PDSCH transmission information. If the CSI-RS feedback timing exists, it is determined that the trigger condition is satisfied.
  • FIG. 21 is a schematic structural diagram of a base station 2100 according to an embodiment of the present invention.
  • the base station 2100 includes a processor 2101, a non-volatile machine-readable storage medium 2102, and a program module stored in the non-transitory machine-readable storage medium 2102 and executed by the processor 2101. 2103.
  • the program module 2103 is configured to: pass the conventional configuration information Knowing that the user terminal UE performs channel quality measurement on the first reference signal port, and receives the first measurement result fed back by the user terminal; performs multi-user scheduling according to the first measurement result, and when the user terminal is scheduled, The trigger condition of the second type measurement is set to be on, thereby triggering the channel quality measurement of the user terminal when performing multi-user scheduling on the second reference signal port and feeding back the second measurement result.
  • the program module 2103 is configured to: add a multi-user CQI information bit in the user-specific high-level signaling or the first DCI, and set the multi-user CQI information bit to be opened, and send the information to the user terminal. And for triggering the user terminal to perform the second type of measurement.
  • the first DCI is used to indicate physical uplink shared channel PUSCH feedback information.
  • the program module 2103 is configured to: construct a third DCI for indicating physical uplink shared channel PUSCH feedback information and physical downlink shared channel PDSCH transmission information; setting a multi-user CQI information bit of the third DCI After being opened, the user terminal is sent to trigger the user terminal to perform the second type of measurement.
  • the program module 2103 is configured to: send a data signal of another user terminal scheduled to be jointly scheduled with the user terminal to an RE used by the user terminal in a zero-power CSI-RS port, so that the user terminal The interference power is measured on the RE assigned to itself, and other user terminals co-scheduled with the user terminal receive data signals on the RE.
  • the program module 2103 is configured to: pre-divide a set of user-specific CSI-RS ports from the CSI-RS port as the second reference signal port, where the user terminal calculates the user Total power of all REs on the dedicated CSI-RS port; one or more first user-specific CSI-RS ports are selected from the user-specific CSI-RS ports, and the first is performed by the first downlink control information DCI a user-specific CSI-RS port is indicated to the user terminal, and the user terminal is used in the first user-specific CSI-RS The signal power is measured on the port.
  • the first DCI is used to indicate physical uplink shared channel PUSCH feedback information.
  • the program module 2103 is configured to: receive the second measurement result sent by the user terminal, obtain a first CQI and a first offset, and according to the first CQI and the first An offset restores the multi-user CQI.
  • the program module 2103 is configured to: receive the second measurement result sent by the user terminal, obtain an MCS indication and a second offset therefrom, and according to the MCS indication and the second offset The shift restores the multi-user CQI.
  • each functional block may be implemented by one device that is physically and/or logically combined, or two or more devices that are physically and/or logically separated, directly and/or indirectly (eg, This is achieved by a plurality of devices as described above by a wired and/or wireless connection.
  • the radio base station, the user terminal, and the like in one embodiment of the present invention can function as a computer that performs processing of the radio communication method of the present invention.
  • FIG. 22 is a diagram showing an example of a hardware configuration of a radio base station and a user terminal according to an embodiment of the present invention.
  • the radio base station 10 and the user terminal 20 described above may be configured as a computer device that physically includes the processor 1001, the memory 1002, the memory 1003, the communication device 1004, the input device 1005, the output device 1006, the bus 1007, and the like.
  • the hardware structures of the wireless base station 10 and the user terminal 20 may include one or more of the devices shown in the figures, or may not include some of the devices.
  • the processor 1001 only illustrates one, but may be multiple processors. This In addition, processing may be performed by one processor, or may be performed by one or more processors simultaneously, sequentially, or by other methods. Additionally, the processor 1001 can be installed by more than one chip.
  • the functions of the wireless base station 10 and the user terminal 20 are realized, for example, by reading a predetermined software (program) into hardware such as the processor 1001 and the memory 1002, thereby causing the processor 1001 to perform an operation, and the communication device
  • the communication performed by 1004 is controlled, and the reading and/or writing of data in the memory 1002 and the memory 1003 is controlled.
  • the processor 1001 for example, causes the operating system to operate to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • the processor 1001 reads out programs (program codes), software modules, data, and the like from the memory 1003 and/or the communication device 1004 to the memory 1002, and executes various processes in accordance therewith.
  • programs program codes
  • software modules software modules
  • data data, and the like
  • the program a program for causing a computer to execute at least a part of the operations described in the above embodiments can be employed.
  • the memory 1002 is a computer readable recording medium, and may be, for example, a read only memory (ROM), an EEPROM (Erasable Programmable ROM), an electrically programmable read only memory (EEPROM), or an electrically programmable read only memory (EEPROM). At least one of a random access memory (RAM) and other suitable storage medium is used.
  • the memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store an executable program (program code), a software module, and the like for implementing the wireless communication method according to the embodiment of the present invention.
  • the memory 1003 is a computer readable recording medium, and may be, for example, a flexible disk, a soft (registered trademark) disk, or a magneto-optical disk (for example, CD-ROM (Compact Disc ROM, etc.), digital versatile disc, Blu-ray (Blu-ray, registered trademark) disc, removable disk, hard disk drive, smart card, flash memory device (for example, card, stick (stick) At least one of a key driver, a magnetic stripe, a database, a server, and other suitable storage medium.
  • the memory 1003 may also be referred to as an auxiliary storage device.
  • the communication device 1004 is hardware (transmission and reception device) for performing communication between computers through a wired and/or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, and the like, for example.
  • the communication device 1004 may include a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to implement, for example, Frequency Division Duplex (FDD) and/or Time Division Duplex (TDD).
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, etc.) that performs an output to the outside.
  • the input device 1005 and the output device 1006 may also be an integrated structure (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected via a bus 1007 for communicating information.
  • the bus 1007 may be composed of a single bus or a different bus between devices.
  • the wireless base station 10 and the user terminal 20 may include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and a programmable logic device (PLD).
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • Hardware such as Field Programmable Gate Array (FPGA) can realize some or all of each functional block by this hardware.
  • the processor 1001 can be installed by at least one of these hardwares.
  • the channel and/or symbol can also be a signal (signaling).
  • the signal can also be a message.
  • the reference signal may also be simply referred to as an RS (Reference Signal), and may also be referred to as a pilot (Pilot), a pilot signal, or the like according to applicable standards.
  • a component carrier may also be referred to as a cell, a frequency carrier, a carrier frequency, or the like.
  • the radio frame may be composed of one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) constituting the radio frame may also be referred to as a subframe.
  • a subframe may be composed of one or more time slots in the time domain.
  • the subframe may be a fixed length of time (eg, 1 ms) that is independent of the numerology.
  • the time slot may have one or more symbols in the time domain (Orthogonal Frequency Division Multiplexing (OFDM), Single Carrier Frequency Division Multiple Access (SC-FDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA) Symbols, etc.).
  • the time slot can also be a time unit based on parameter configuration.
  • the time slot may also include a plurality of minislots. Each minislot may be composed of one or more symbols in the time domain.
  • a minislot can also be referred to as a subslot.
  • Radio frames, subframes, time slots, mini-slots, and symbols all represent time units when signals are transmitted. Radio frames, subframes, time slots, mini-slots, and symbols can also use other names that correspond to each other.
  • one subframe may be referred to as a Transmission Time Interval (TTI), and a plurality of consecutive subframes may also be referred to as a TTI.
  • TTI Transmission Time Interval
  • One slot or one minislot may also be referred to as a TTI. That is to say, the subframe and/or the TTI may be a subframe (1 ms) in the existing LTE, or may be a period shorter than 1 ms (for example, 1 to 13 symbols), or may be a period longer than 1 ms.
  • a unit indicating a TTI may also be referred to as a slot, a minislot, or the like instead of a subframe.
  • TTI refers to, for example, a minimum time unit scheduled in wireless communication.
  • the radio base station performs scheduling for all user terminals to allocate radio resources (bandwidth, transmission power, etc. usable in each user terminal) in units of TTIs.
  • the definition of TTI is not limited to this.
  • the TTI may be a channel-coded data packet (transport block), a code block, and/or a codeword transmission time unit, or may be a processing unit such as scheduling, link adaptation, or the like.
  • the time interval e.g., the number of symbols
  • actually mapped to the transport block, code block, and/or codeword may also be shorter than the TTI.
  • TTI time slot or one mini time slot
  • more than one TTI ie, more than one time slot or more than one micro time slot
  • the number of slots (the number of microslots) constituting the minimum time unit of the scheduling can be controlled.
  • a TTI having a length of 1 ms may also be referred to as a regular TTI (TTI in LTE Rel. 8-12), a standard TTI, a long TTI, a regular subframe, a standard subframe, or a long subframe.
  • TTI shorter than a conventional TTI may also be referred to as a compressed TTI, a short TTI, a partial TTI (partial or fractional TTI), a compressed subframe, a short subframe, a minislot, or a subslot.
  • a long TTI (eg, a regular TTI, a subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
  • a short TTI eg, a compressed TTI, etc.
  • TTI length of the TTI may be replaced with 1 ms.
  • a resource block is a resource allocation unit of a time domain and a frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain.
  • the RB may include one or more symbols in the time domain, and may also be one slot, one minislot, one subframe, or one TTI.
  • a TTI and a subframe may each be composed of one or more resource blocks.
  • one or more RBs may also be referred to as a physical resource block (PRB, Physical RB), a subcarrier group (SCG, Sub-Carrier Group), Resource Element Group (REG), PRG pair, RB pair, etc.
  • PRB physical resource block
  • SCG subcarrier group
  • REG Resource Element Group
  • the resource block may also be composed of one or more resource elements (REs, Resource Elements).
  • REs resource elements
  • Resource Elements For example, one RE can be a subcarrier and a symbol of a radio resource area.
  • radio frames, subframes, time slots, mini-slots, symbols, and the like are merely examples.
  • the number of subframes included in the radio frame, the number of slots of each subframe or radio frame, the number of microslots included in the slot, the number of symbols and RBs included in the slot or minislot, and the number of RBs included in the RB The number of subcarriers, the number of symbols in the TTI, the symbol length, and the length of the cyclic prefix (CP, Cyclic Prefix) can be variously changed.
  • the information, parameters, and the like described in the present specification may be expressed by absolute values, may be represented by relative values with predetermined values, or may be represented by other corresponding information.
  • wireless resources can be indicated by a specified index.
  • the formula or the like using these parameters may be different from those explicitly disclosed in the present specification.
  • the information, signals, and the like described in this specification can be expressed using any of a variety of different techniques.
  • data, commands, instructions, information, signals, bits, symbols, chips, etc. which may be mentioned in all of the above description, may pass voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of them. Combined to represent.
  • information, signals, and the like may be output from the upper layer to the lower layer, and/or from the lower layer to the upper layer.
  • Information, signals, etc. can be input or output via a plurality of network nodes.
  • Information or signals input or output can be stored in a specific place (such as memory) or managed by a management table. Information or signals input or output may be overwritten, updated or supplemented. The output information, signals, etc. can be deleted. The input information, signals, etc. can be sent to other devices.
  • the notification of the information is not limited to the mode/embodiment described in the specification, and may be performed by other methods.
  • the notification of the information may be through physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI), and upper layer signaling (for example, radio resource control).
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • MAC Media Access Control
  • the physical layer signaling may be referred to as L1/L2 (Layer 1/Layer 2) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like.
  • the RRC signaling may also be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.
  • the MAC signaling can be notified, for example, by a MAC Control Unit (MAC CE).
  • MAC CE MAC Control Unit
  • the notification of the predetermined information is not limited to being explicitly performed, and may be performed implicitly (for example, by not notifying the predetermined information or by notifying the other information).
  • the determination can be performed by a value (0 or 1) represented by 1 bit, or by a true or false value (boolean value) represented by true (true) or false (false), and can also be compared by numerical values ( For example, comparison with a predetermined value).
  • Software is called software, firmware, middleware, microcode, hardware description language, Or by other names, it should be interpreted broadly to mean commands, command sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines. Routines, objects, executables, threads of execution, steps, functions, and more.
  • software, commands, information, and the like may be transmitted or received via a transmission medium.
  • a transmission medium For example, when using wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) from a website, server, or other remote source
  • wired technology coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • base station (BS, Base Station)", “radio base station”, “eNB”, “gNB”, “cell”, “sector”, “cell group”, “carrier”, and “component carrier”
  • BS Base Station
  • radio base station eNB
  • gNB gNodeB
  • cell a cell
  • cell group a carrier
  • component carrier a component carrier
  • the base station is sometimes referred to by a fixed station, a NodeB, an eNodeB (eNB), an access point, a transmission point, a reception point, a femto cell, a small cell, and the like.
  • a base station can accommodate one or more (eg, three) cells (also referred to as sectors). When the base station accommodates multiple cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each smaller area can also pass through the base station subsystem (for example, a small indoor base station (RFH, remote head (RRH), Remote Radio Head))) to provide communication services.
  • the term "cell” or “sector” refers to a portion or the entirety of the coverage area of a base station and/or base station subsystem that performs communication services in the coverage.
  • the base station sometimes also uses a fixed station, a NodeB, an eNodeB (eNB), an access point, a transmission point, a receiving point, and a femto.
  • a term such as a cell or a small cell is used.
  • Mobile stations are also sometimes used by those skilled in the art as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless Terminals, remote terminals, handsets, user agents, mobile clients, clients, or several other appropriate terms are used.
  • the wireless base station in this specification can also be replaced with a user terminal.
  • each mode/embodiment of the present invention can be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication between a plurality of user-to-device (D2D) devices.
  • D2D user-to-device
  • the function of the above-described wireless base station 10 can be regarded as a function of the user terminal 20.
  • words such as "upstream” and "downstream” can also be replaced with "side”.
  • the uplink channel can also be replaced with a side channel.
  • the user terminal in this specification can also be replaced with a wireless base station.
  • the function of the user terminal 20 described above can be regarded as a function of the wireless base station 10.
  • the node may be considered, for example, but not limited to, a Mobility Management Entity (MME), a Serving-Gateway (S-GW, etc.), or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • LTE-B Long-Term Evolution
  • LTE-Beyond Long-Term Evolution
  • Super 3rd generation mobile communication system SUPER 3G
  • IMT-Advanced advanced international mobile communication
  • 4th generation mobile communication system (4G, 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • future radio access FAA
  • new radio access technology New-RAT, Radio Access Technology
  • NR New Radio Access Technology
  • NX new radio access
  • FX Next Generation Wireless Access
  • GSM Registered trademark
  • GSM Global System for Mobile Communications
  • CDMA2000 Code Division Multiple Access 2000
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi (registered trademark)
  • IEEE 802.16 WiMAX (registered trademark)
  • IEEE 802.20 Ultra Wideband
  • any reference to a unit using the names "first”, “second”, etc., as used in this specification, does not fully limit the number or order of the units. These names can be used in this specification as a convenient method of distinguishing between two or more units. Thus, reference to a first element and a second element does not mean that only two elements may be employed or that the first element must prevail in the form of the second unit.
  • determination used in the present specification sometimes includes various actions. For example, regarding “judgment (determination)", calculation, calculation, processing, deriving, investigating, looking up (eg, table, database, or other) may be performed. Search in the data structure, ascertaining, etc. are considered to be “judgment (determination)”. Further, regarding “judgment (determination)”, reception (for example, receiving information), transmission (for example, transmission of information), input (input), output (output), and access (for example) may also be performed (for example, Accessing data in memory, etc. is considered to be “judgment (determination)”.
  • judgment (determination) it is also possible to consider “resolving”, “selecting”, selecting (choosing), establishing (comparing), comparing (comparing), etc. as “judging (determining)”. That is to say, regarding "judgment (determination)", several actions can be regarded as performing "judgment (determination)".
  • connection means any direct or indirect connection or combination between two or more units, This includes the case where there is one or more intermediate units between two units that are “connected” or “coupled” to each other.
  • the combination or connection between the units may be physical, logical, or a combination of the two.
  • connection can also be replaced with "access”.
  • two units may be considered to be electrically connected by using one or more wires, cables, and/or printed, and as a non-limiting and non-exhaustive example by using a radio frequency region.
  • the electromagnetic energy of the wavelength of the region, the microwave region, and/or the light is "connected” or "bonded” to each other.

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Abstract

本发明实施例提供了一种信道质量反馈方法、用户终端、信道质量测量的控制方法及基站。在一个示例中，该信道质量反馈方法包括：用户终端(UE)在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。本发明的方案旨在提高多用户调度时信道质量反馈的准确度。

Description

信道质量反馈方法、用户终端、信道质量测量的控制方法及基站 技术领域
本发明涉及通信技术，尤指一种信道质量反馈方法、用户终端、信道质量测量的控制方法及基站。
发明背景
针对多用户多入多出(Multi-User Multiple-Input Multiple-Output，MU-MIMO)技术进行信道质量测量和信道状态信息(channel state information，CSI)估计，在测量多用户干扰(Multi-User Interference，MUI)时，存在一个两难的局面：MUI很大程度上取决于用户调度结果，但是实际用户调度又有赖于多用户信道质量指示(Multi-User Channel Quality Indicator，MU-CQI)反馈。
发明内容
本发明实施例提供了一种信道质量反馈方法、用户终端、信道质量测量的控制方法及基站、以及程序和非易失性机器可读存储介质，旨在提高多用户传输时的信道质量反馈的准确度。
在一个示例中，一种信道质量反馈方法包括：
用户终端(UE)在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；
检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
在一个示例中，一种信道质量测量的控制方法包括：
基站通过常规配置信息通知用户终端(UE)在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果；
所述基站根据所述第一测量结果进行多用户调度，并在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
在一个示例中，一种用户终端包括：
处理器；
非易失性机器可读存储介质；以及
存储在该非易失性机器可读存储介质中、由该处理器执行的程序模块；
其中，所述程序模块用于：
在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；
检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
在一个示例中，一种基站包括：
处理器；
非易失性机器可读存储介质；以及
存储在该非易失性机器可读存储介质中、由该处理器执行的程序模块；
其中，所述程序模块用于：
通过常规配置信息通知用户终端UE在第一参考信号端口进行信 道质量测量，并接收该用户终端反馈的第一测量结果；
根据所述第一测量结果进行多用户调度，并在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
在一个示例中，提供了一种程序，用于使计算机执行以下操作：
用户终端UE在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；
检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
在一个示例中，提供了一种非易失性机器可读存储介质，所述存储介质中存储有机器可读指令，所述机器可读指令可以由处理器执行以完成以下操作：
用户终端UE在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；
检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
在一个示例中，提供了一种程序，用于使计算机执行以下操作：
基站通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果；
所述基站根据所述第一测量结果进行多用户调度，并在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并 反馈第二测量结果。
在一个示例中，提供了一种非易失性机器可读存储介质，所述存储介质中存储有机器可读指令，所述机器可读指令可以由处理器执行以完成以下操作：
基站通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果；
所述基站根据所述第一测量结果进行多用户调度，并在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
在一个示例中，一种用户终端包括：
第一测量模块，用于在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；以及
第二测量模块，用于检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
在一个示例中，一种基站包括：
第一测量控制模块，用于通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果；以及
第二测量控制模块，用于根据所述第一测量结果进行多用户调度，并在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
附图简要说明
图1为本发明实施例中信道质量反馈的方法100的流程示意图。
图2为本发明实施例中信道质量反馈的方法200的流程示意图。
图3为本发明实施例中的多用户调度示意图。
图4为本发明实施例中信道质量反馈的方法400的流程示意图。
图5为本发明实施例中信道质量反馈的方法500的流程示意图。
图6为本发明实施例中信道质量反馈的方法600的流程示意图。
图7为本发明实施例中信道质量反馈的方法700的流程示意图。
图8为本发明实施例中信道质量反馈的方法800的流程示意图。
图9为本发明实施例中信道质量反馈的方法900的流程示意图。
图10为本发明实施例中信道质量反馈的方法1000的流程示意图。
图11为本发明实施例中多用户CQI信息位的传输示意图。
图12为本发明实施例中多用户CQI信息位的传输示意图。
图13为本发明实施例中信道质量反馈的方法1300的流程示意图。
图14为本发明实施例中信道质量反馈的方法1400的流程示意图。
图15为本发明实施例中信道质量测量的控制方法1500的流程示意图。
图16为本发明实施例中信道质量测量的控制方法1600的流程示意图。
图17为本发明实施例中信道质量测量的控制方法1700的流程示意图。
图18为本发明实施例中信道质量测量的控制方法1800的流程示 意图。
图19为本发明实施例中信道质量测量的控制方法1900的流程示意图。
图20为本发明实施例中用户终端2000的结构示意图。
图21为本发明实施例中基站2100的结构示意图。
图22是示出本发明的一实施方式所涉及的无线基站和用户终端的硬件结构的一例的图。
实施本发明的方式
为使本发明的目的、技术方案及优点更加清楚明白，以下参照附图并举实施例，对本发明进一步详细说明。
本发明实施例提供了一种信道质量测量和反馈的机制，为用户终端增加第二类型测量这一测量过程，利用第二参考信号端口进行多用户调度时的信道质量测量，获得多用户干扰(MUI)，从而提高多用户传输时的信道质量反馈的准确度。在一个示例中，所述第二类型测量是由触发条件控制，为非周期性的。比如，当基站调度上某用户终端并发现该用户终端的数据量较大时，可将该触发条件设置为打开，从而针对该用户终端启动第二类型测量。
图1为本发明实施例中信道质量反馈的方法100的流程示意图。在一个示例中，该方法100包括以下操作。
在步骤101，用户终端(UE)在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。
需要指出，步骤101执行的是第一类型测量，所述第一参考信号端口可以是常规信道状态信息导频(CSI-RS)端口，也可以是小区专有导频(Cell-specific reference signal，CRS)端口。
在一个示例中，所述常规CSI-RS端口是基站预先设置的用于第一类型测量的CSI-RS端口。所述第一类型测量是已有测量过程，可以是周期性测量，也可以是非周期性测量，得到的第一测量结果中携带有第一CQI，通常情况下测量的是单用户CQI。也即，所述用户终端在第一参考信号端口进行的测量可以在基站的配置下周期进行，也可以由基站的下行控制信令触发下不定期进行。需要指出，第一类型测量获取的是小区间干扰的信息。
在步骤102，检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
在一个示例中，所述第二参考信号端口可以是解调导频(DMRS)端口。该第二参考信号端口也可以是一组预先设置的用户专用CSI-RS端口，用于第二类型测量。在一个示例中，所述常规CSI-RS端口和所述用户专用CSI-RS端口通常是不同，二者并不复用。在一个示例中，所述触发条件之一是该用户终端接收到自身的数据信号，也即该用户终端在下行传输中被调度上，此时执行的第二类型测量通过测量本小区内的实际MUI得到更为准确的MU-CQI。
实际应用中，基站和用户终端之间可以事先约定一个新反馈模式。在一个示例中，所述新反馈模式可以命名为模式4-0或者模式3-3。在一个示例中，该新反馈模式可以包括：子带MU-CQI，用于反馈通过DMRS端口测量或者用户专用CSI-RS端口测量获得的多用户CQI。进一步地，该新反馈模式还可以包括：宽带MU-CQI。当用户终端从基站发送的第二DCI中获知资源分配类型为连续(比如资源分配类型的取值为0)时，该用户终端可以不向基站反馈宽带MU-CQI。所述第二DCI可采用DCI 2C或者DCI 2D格式，用于传输 下行链路许可(DL grant)。当所述资源分配类型为离散(比如资源分配类型的取值为1)时，该用户终端将所有的子带MU-CQI取平均后得到所述宽带MU-CQI反馈给基站。进一步地，该新反馈模式可以包括与协议TS36.213中定义的模式3-0或模式3-1或模式3-2相同的字段。
需要指出，图1所述的第一类型测量和第二类型测量是数据通信中两种不同类型的测量过程，二者之间的先后关系并不加以约束。在一个示例中，可以是第一类型测量后进行第二类型测量，也可以是第二类型测量后进行第一类型测量，还可以是第一类型测量和第二类型测量同时发生。在一个示例中，第一类型测量和第二类型测量是相互独立的，第一类型测量是周期性发生的，其发生时间并不受到第二类型测量的影响。在一个示例中，第二类型测量作为第一类型测量的补充，用于提高信道质量反馈的准确度。
图2为本发明实施例中信道质量反馈的方法200的流程示意图。在一个示例中，该方法200包括以下操作。
在步骤201，用户终端在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。在一个示例中，该用户终端在第一类型测量中测量的是SU-CQI。
在步骤202，该用户终端检测第二类型测量的触发条件是否满足。
在步骤203，当该触发条件得到满足时，所述用户终端计算本次多用户调度中使用的所有DMRS端口上资源元素(RE)的总功率。
在步骤204，在分配给该用户终端的DMRS端口上进行信道估计，获得所述用户终端的信号功率。
需要指出，CSI-RS端口和DMRS端口采用的预编码方式不同， 与CSI-RS端口相比，在DMRS端口上估计信号功率针对性更强，估计结果更为准确。
在步骤205，所述用户终端根据所述总功率和所述信号功率得到干扰功率。
在一个示例中，将所述总功率减去所述信号功率，即可得到所述干扰功率。由于用户终端计算的是多用户调度中所有DMRS端口的总功率，因此得到的干扰功率中也包含本小区内的实际MUI。
在步骤206，该用户终端利用所述信号功率和所述干扰功率得到第二测量结果，发送给该基站。
在一个示例中，步骤206所述得到第二测量结果反馈给基站包括：根据所述信号功率和所述干扰功率生成多用户CQI，并将所述多用户CQI增加到第二测量结果中发送给所述基站。具体地，可在该第二测量结果中设置一个字段，用于携带该多用户CQI。在一个示例中，所述多用户CQI包括子带MU-CQI，还可进一步包括宽带MU-CQI。
假设通信系统包含K个子带，测量窗口包含N个TTI。在该测量窗口中，第k个子带上包含有M个第一参考信号端口或第二参考信号端口，在上述端口上用户终端的接收信号可用yk,m表示，其中m＝1,…,M。
首先，根据公式(1)计算每个子带上的接收信号的总功率PSIN,k。
Figure PCTCN2017081826-appb-000001
接着，基于接收信号和与基站约定的参考信号发射序列在该用户终端的第二参考信号端口(可以是DMRS端口或者用户专用CSI-RS 端口)上进行信道估计，得到信道估计结果hk,m，并根据公式(2)计算出信号功率PS,k。
Figure PCTCN2017081826-appb-000002
然后，根据公式(3)计算SINR，并将该SINR转换为以dB为单位。
Figure PCTCN2017081826-appb-000003
最后，按照规定的量化规则将SINRk量化为离散数值。比如，可以将SINRk量化到27阶离散值上，分别对应的CQI取值为0-26。
需要指出，对于第一类型测量而言，PSIN,k包含信号功率、噪声功率和来自其他小区的干扰功率；对于第二类型测量而言，PSIN,k中还进一步包括来自本小区其他用户终端的干扰功率。
在一个示例中，当公式(3)中的SINRk为子带(subband)的SINR时，对应得到的CQI即为子带CQI。
对于宽带SINR和宽带CQI，可将各个子带上的SINR进行平均得到宽带SINR，再将该宽带SINR量化后就可得到宽带CQI。
在一个示例中，MU-CQI还可以采用下述方法计算得到。
首先，根据公式(2)计算PS,k。
接着，用户基于接收信号和其他用户终端的参考信号序列估计其他用户终端的信道情况，得到的信道估计结果为
Figure PCTCN2017081826-appb-000004
其中P为基站进行多用户调度时的用户个数，该用户个数是由基站通过下行信令通知给用户。
然后，该用户终端根据公式(4)计算多用户调度时的干扰功率， 并测量小区间干扰和噪声功率PIN,k。
Figure PCTCN2017081826-appb-000005
在一个示例中，该用户终端可基于零功率参考信号测得PIN,k。在该零功率参考信号上，所述用户终端的基站不发射功率。
最后，该用户终端根据公式(5)计算出多用户SINR，并将该多用户SINR量化后得到MU-CQI。
Figure PCTCN2017081826-appb-000006
在一个示例中，该多用户SINR可以量化到设定的阶数上，比如进行27阶量化，对应MU-CQI的序号为0～26。
对于宽带MU-SINR和MU-CQI，可以将K个子带的SNR平均并量化后得到。
在一个示例中，第一类型测量和第二类型测量同时触发，步骤206所述得到第二测量结果反馈给基站包括：根据所述信号功率和所述干扰功率生成多用户CQI，并将第一测量结果中的第一CQI修改为所述多用户CQI后，发送给所述基站，从而降低整个测量反馈的开销。也即，在该示例中，测量反馈中不需要增加新的字段，而是将现有字段用于携带所述多用户CQI。在一个示例中，该用户终端也可将第一CQI和所述多用户CQI同时反馈给所述基站。
在一个示例中，步骤206所述得到第二测量结果反馈给基站包括：根据所述信号功率和所述干扰功率生成多用户CQI，并确定第一CQI和所述多用户CQI之间的第一偏移量，再将所述第一CQI和所述第一偏移量发送给所述基站。假设所述第一CQI为7，所述多用户 CQI为15，则确定出所述第一偏移量为8。在一个示例中，所述第一CQI是第一类型测量获得的，该第一类型测量可以与第二类型测量同时进行，也可以是在所述第二类型测量之前发生。
在一个示例中，步骤206所述得到第二测量结果反馈给基站包括：根据所述信号功率和所述干扰功率生成多用户CQI，从第二DCI中获得调制与编码策略(MCS)指示，确定所述MCS指示与所述多用户CQI之间的第二偏移量，再将所述MCS指示与所述第二偏移量发送给所述基站。在一个示例中，所述MCS指示为11，多用户CQI为13，则第二偏移量为2。
如图3所示，假设子帧1-5时UE1在常规CSI-RS端口上测量CSI-RS信号，在子帧7时UE1给出相应的CSI-RS反馈。可以看出，在子帧2，UE2、UE3、UE4、UE5在下行链路被调度。在子帧4，UE4、UE5、UE6、UE7在下行链路被调度。在子帧11，UE1、UE3、UE5、UE7在下行链路被调度，此时UE1在DMRS端口上进行测量。在子帧14，UE1将DMRS端口上的第二测量结果反馈给基站。在子帧16，UE1、UE3、UE5、UE7在下行链路被调度。此时，UE1在子帧14给出的反馈能够更好地指导子帧16的用户调度。
图4为本发明实施例中信道质量反馈的方法400的流程示意图。在一个示例中，该方法400包括以下操作。
在步骤401，用户终端在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。
在步骤402，该用户终端检测第二类型测量的触发条件是否满足。
在步骤403，当该触发条件得到满足时，在分配给该用户终端的 DMRS端口上进行信道估计，获得该用户终端的信号功率。
在步骤404，在与该用户终端联合调度的其他用户终端分配到的DMRS端口上分别进行信道估计得到干扰功率。
在一个示例中，该用户终端为UE1，本次多用户调度上的用户终端包括：UE1、UE3、UE5、UE7，则UE1在UE3、UE5、UE7的DMRS端口上都要进行信道估计，得到UE3、UE5、UE7对UE1造成的实际MUI。在一个示例中，基站将本次多用户调度上的数据传输层的层数通过第二DCI通知该用户终端，使得该用户终端获知在确定干扰功率时，需要在多少个DMRS端口上执行信道估计。
在步骤405，该用户终端利用所述信号功率和所述干扰功率得到第二测量结果，发送给该基站。
图5为本发明实施例中信道质量反馈的方法500的流程示意图。在一个示例中，该方法500包括以下操作。
在步骤501，用户终端在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。
在步骤502，接收所述基站在该用户终端的零功率(zero power，ZP)CSI-RS端口上发送的与该用户终端联合调度的其他用户终端的数据信号。
具体地，基站给本次多用户调度上的用户终端分配零功率CSI-RS端口的RE，不同用户终端在零功率CSI-RS端口上的RE位置不同。基站在一个用户终端的零功率CSI-RS端口的RE上不传输该用户终端的数据信号，而是传输联合调度的其他用户终端的数据信号。
在步骤503，该用户终端检测第二类型测量的触发条件是否满足。
在步骤504，当该触发条件得到满足时，在该用户终端的DMRS端口上进行信道估计，获得所述用户终端的信号功率。
在步骤505，该用户终端在所述ZP CSI-RS端口中分配给自身的RE上测量干扰功率，从而得到实际MUI。
需要指出，与该用户终端不同的是，联合调度的其他用户终端将该RE上接收到的信号看作数据信号。也即，在多用户调度中，基站分配给每个用户终端的ZP CSI-RS端口上的RE都是不同的，用户终端在ZP CSI-RS端口中自身的RE上进行干扰功率的测量。此外，该用户终端将ZP CSI-RS端口中其他用户终端的RE上发送的信号视为数据信道并解调这些RE上传输的数据信号。
在步骤506，该用户终端利用所述信号功率和所述干扰功率得到第二测量结果，发送给该基站。
图6为本发明实施例中信道质量反馈的方法600的流程示意图。在一个示例中，该方法600包括以下操作。
在步骤601，用户终端在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。
在步骤602，所述基站从一组预先设置的用户专用CSI-RS端口中选出一个或多个第一用户专用CSI-RS端口，通过第一下行控制信息(DCI)将所述第一用户专用CSI-RS端口指示给该用户终端。相应地，该用户终端接收所述携带第一用户专用CSI-RS端口的指示信息的第一DCI。
在一个示例中，基站可以从用户专用CSI-RS端口中选出一个第一用户专用CSI-RS端口，或者选出两个第一用户专用CSI-RS端口。在一个示例中，该第一用户专用CSI-RS端口的指示信息可携带在上 行链路许可(UL grant)中。需要指出，基站和用户终端之间可以事先约定好这组用户专用CSI-RS端口，或者由基站通过上层信令将预先设置的用户专用CSI-RS端口知会该用户终端。
在步骤603，该用户终端检测第二类型测量的触发条件是否满足。
在步骤604，当该触发条件得到满足时，在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功率。
在步骤605，计算在所述一组用户专用CSI-RS端口上所有RE的总功率。
在步骤606，根据该总功率和所述信号功率得到干扰功率。可以看出，由于用户终端计算的是所有用户专用CSI-RS端口上的总功率，因此步骤606得到的干扰功率中包含本小区内的实际MUI。
在步骤607，该用户终端利用所述信号功率和所述干扰功率得到第二测量结果，发送给该基站。
图7为本发明实施例中信道质量反馈的方法700的流程示意图。在一个示例中，该方法700包括以下操作。
在步骤701，用户终端在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。
在步骤702，所述基站从预先设置的用户专用CSI-RS端口中选出一个或多个第一用户专用CSI-RS端口，通过第一DCI将所述第一用户专用CSI-RS端口指示给该用户终端。相应地，所述用户终端接收携带所述第一用户专用CSI-RS端口的指示信息的所述第一DCI。
在步骤703，该用户终端检测第二类型测量的触发条件是否满足。
在步骤704，当该触发条件得到满足时，在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功率。
在步骤705，在第二用户专用CSI-RS端口进行信道估计获得干扰功率。
在一个示例中，所述第二用户专用CSI-RS端口为所述预先设置的用户专用CSI-RS端口中除去所述第一用户专用CSI-RS端口之外的一个或多个其他用户专用CSI-RS端口。比如，预先设置的用户专用CSI-RS端口有8个，第一用户专用CSI-RS端口有2个，则第二用户专用CSI-RS端口最多可以有6个。在一个示例中，基站可以通过第二DCI将实际使用的用户专用CSI-RS端口的数目通知该用户终端，使得该用户终端获知在确定干扰功率时，需要在多少个第二用户专用CSI-RS端口上执行信道估计。在一个示例中，该实际使用的用户专用CSI-RS端口的数目可以小于预先设置的用户专用CSI-RS端口的数目。比如，所述第二用户专用CSI-RS端口有2个，则该实际使用的用户专用CSI-RS端口的数目为4。
在步骤706，该用户终端利用所述信号功率和所述干扰功率得到第二测量结果，发送给该基站。
图8为本发明实施例中信道质量反馈的方法800的流程示意图。在一个示例中，该方法800包括以下操作。
在步骤801，用户终端在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。
在步骤802，该用户终端从预先设置的用户专用CSI-RS端口中选出一个或多个第一用户专用CSI-RS端口。
进一步地，该用户终端可将所述第一用户专用CSI-RS端口通知所述基站。与步骤702不同的是，由于步骤802中第一用户专用CSI-RS端口是由用户终端选择的，基站不必在UL grant中增加第一 用户专用CSI-RS端口的指示信息。
在步骤803，该用户终端检测第二类型测量的触发条件是否满足。
在步骤804，当该触发条件得到满足时，在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功率。
在步骤805，计算在所述预先设置的用户专用CSI-RS端口上所有RE的总功率。
在步骤806，根据该总功率和所述信号功率得到干扰功率。
在步骤807，该用户终端利用所述信号功率和所述干扰功率得到第二测量结果，发送给该基站。
图9为本发明实施例中信道质量反馈的方法900的流程示意图。在一个示例中，该方法900包括以下操作。
在步骤901，用户终端在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。
在步骤902，该用户终端从预先设置的一组用户专用CSI-RS端口中选出一个或多个第一用户专用CSI-RS端口，并将所述第一用户专用CSI-RS端口通知所述基站。
在步骤903，该用户终端检测第二类型测量的触发条件是否满足。
在步骤904，当该触发条件得到满足时，在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功率。
在步骤905，在第二用户专用CSI-RS端口进行信道估计获得干扰功率。在一个示例中，所述第二用户专用CSI-RS端口为所述预先设置的用户专用CSI-RS端口中除去所述第一用户专用CSI-RS端口之外的一个或多个其他用户专用CSI-RS端口。
在步骤906，该用户终端利用所述信号功率和所述干扰功率得到 第二测量结果，发送给该基站。
图10为本发明实施例中信道质量反馈的方法1000的流程示意图。在一个示例中，该方法1000包括以下操作。
在步骤1001，用户终端在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。
在步骤1002，所述用户终端读取用户专用高层信令或者第一DCI中携带的多用户CQI信息位。
在一个示例中，所述用户专用高层信令为无线资源控制(Radio Resource Control，RRC)信令，在该RRC信令中增加多用户CQI参数，该多用户CQI参数的取值为开(ON)或者关(OFF)。
在一个示例中，所述第一DCI为PUSCH反馈信息，采用DCI 4的格式。在一个示例中，所述DCI 4中可增加一个比特，作为所述多用户CQI信息位。在一个示例中，所述DCI 4中还可进一步增加3个比特，用于指示多用户调度的数据传输层的层数。
在步骤1003，根据所述多用户CQI信息位判断是否进行第二类型测量。在一个示例中，当多用户CQI信息位的取值为1时，表明需要进行所述第二类型测量并反馈多用户CQI。
在步骤1004，当确定进行所述第二类型测量时，所述用户终端检测是否接收到自身的数据信号。
在步骤1005，如果接收到该数据信号，所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给所述基站。
在一个示例中，所述第二参考信号端口可以是DMRS端口，也可以是用户专用CSI-RS端口。需要指出，步骤1005的操作可参考图 2-9的描述。
图11中，在子帧11时，基站向UE1发出第一DCI、第二DCI和PDSCH数据信号，该第一DCI携带多用户CQI信息位，在子帧14时UE1反馈第一CQI和第一偏移量。其中，第一DCI和第二DCI可占用相同的时间资源。需要指出，子帧1-10的情况可参考图3所示，在图11中没有示出。
图12中，在子帧10时，基站向UE1发出第一DCI，该第一DCI携带多用户CQI信息位，在子帧11时基站向UE1发出第二DCI和PDSCH数据信号。由于在子帧11时UE1接收到自身的数据信号，因此被触发在DMRS端口进行测量。在子帧14时，UE1根据第二类型测量向基站反馈第一CQI和第一偏移量。需要指出，子帧1-9的情况可参考图3所示，在图12中没有再行示出。
图13为本发明实施例中信道质量反馈的方法1300的流程示意图。在一个示例中，该方法1300包括以下操作。
在步骤1301，用户终端在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。
在步骤1302，所述基站发出第三DCI，用于指示物理上行共享信道(PUSCH)反馈信息和物理下行共享信道(PDSCH)传输信息。在一个示例中，所述第三DCI是一种新设计的DCI，用于同时传输PUSCH反馈信息和PDSCH传输信息，使得用户终端只需要进行一次DCI解析，就能得到上行和下行两类信息。在一个示例中，所述第三DCI将DCI 4和DCI 2C/2D中的相同字段进行合并，从而降低DCI开销。
在步骤1303，所述用户终端读取所述第三DCI中携带的多用户CQI信息位。
在步骤1304，当所述多用户CQI信息位指示需要进行第二类型测量时，所述用户终端检测是否接收到自身的数据信号。
在步骤1305，如果接收到该数据信号，所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
在一个示例中，步骤1004或步骤1304所述用户终端检测是否接收到自身的数据信号包括：当所述用户终端在子帧n接收到所述多用户CQI信息位时，确定该用户终端是否在子帧(n-k1)到子帧(n+k2)之间接收到所述数据信号，如果接收到则确定该触发条件被满足，其中k1大于等于(-k2)，所述k2大于或等于0。其中，所述用户终端在子帧(n+k3)反馈所述第二测量结果，其中k3大于k2。在一个示例中，k3-k2>2，也即需要给所述用户终端预留不小于2个子帧的时间进行数据解析。
图14为本发明实施例中信道质量反馈的方法1400的流程示意图。在一个示例中，该方法1400包括以下操作。
在步骤1401，用户终端在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。
在步骤1402，所述用户终端判断是否接收到第二DCI。其中，所述第二DCI用于指示物理下行共享信道(PDSCH)传输信息。
在步骤1403，在接收到所述第二DCI时，判断在测量窗口是否存在CSI-RS反馈时机。在一个示例中，假设接收到该第二DCI的子 帧为子帧n，则所述测量窗口在(n-k1)和(n+k2)之间，可持续一个或多个子帧，其中k1大于等于(-k2)，k2大于或等于0。
在步骤1404，如果存在所述CSI-RS反馈时机，所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果上报给基站。在一个示例中，当所述第二参考信号端口为DMRS端口时，所述第二测量结果为DMRS反馈。该DMRS反馈可包括子带MU-CQI，还可进一步包括宽带MU-CQI，和/或，模式3-0或模式3-1或模式3-2中定义的字段。
在一个示例中，所述子带MU-CQI计算如下：确定该用户终端在每个子带上的信号功率，并估计每个子带上该用户终端的干扰功率，根据每个子带上所述信号功率和所述干扰功率的比值确定该子带上的多用户SINR，并根据该多用户SINR得到该子带上的多用户CQI。
在一个示例中，所述宽带MU-CQI计算如下：在根据从基站接收到的资源分配类型确定需要计算该用户终端的宽带多用户CQI时，将所有子带上的多用户SINR取平均后量化，得到宽带多用户CQI。
从图14的描述可以看出，步骤102所述触发条件为该用户终端被调度上并且在测量窗口内该用户终端拥有进行CSI-RS反馈的机会。在一个示例中，该用户终端被配置为周期性地进行CSI-RS反馈。
图15为本发明实施例中信道质量测量的控制方法1500的流程示意图。在一个示例中，该方法1500包括以下操作。
在步骤1501，基站通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果。在一个示例中，所述基站可以根据所述第一测量结果进行多用户调度。
在步骤1502，所述基站在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
在一个示例中，步骤1502所述将第二类型测量的触发条件设置为打开包括：所述基站在用户专用高层信令或者第一DCI中增加多用户CQI信息位，并将该多用户CQI信息位设置为打开后，发送给所述用户终端，用于触发该用户终端进行所述第二类型测量。其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息。
在一个示例中，步骤1502所述将第二类型测量的触发条件设置为打开包括：所述基站构造用于指示物理上行共享信道PUSCH反馈信息和物理下行共享信道PDSCH传输信息的第三DCI，并将所述第三DCI的多用户CQI信息位设置为打开后，发送给所述用户终端，用于触发该用户终端进行所述第二类型测量。
图16为本发明实施例中信道质量测量的控制方法1600的流程示意图。在一个示例中，该方法1600包括以下操作。
在步骤1601，基站通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果。此时，基站启动的是第一类型测量。
在步骤1602，所述基站在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
在步骤1603，所述基站确定零功率CSI-RS端口中分配给该用户终端使用的RE，在该RE上发送与该用户终端联合调度的其他用户 终端的数据信号，使得所述用户终端在所述分配给自身的RE上测量干扰功率，并使得与该用户终端联合调度的其他用户终端在该RE上接收数据信号。
图17为本发明实施例中信道质量测量的控制方法1700的流程示意图。在一个示例中，该方法1700包括以下操作。
在步骤1701，基站通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果。
在步骤1702，所述基站在该用户终端被调度时，将第二类型测量的触发条件设置为打开。
在步骤1703，所述基站从CSI-RS端口中预先划分出一组用户专用CSI-RS端口作为第二参考信号端口，触发所述用户终端在该第二参考信号端口进行多用户调度时的信道质量测量。在一个示例中，所述用户终端被触发后，计算在所述用户专用CSI-RS端口上所有RE的总功率。
在步骤1704，该基站从所述用户专用CSI-RS端口中选出一个或多个第一用户专用CSI-RS端口，通过第一下行控制信息DCI将所述第一用户专用CSI-RS端口指示给该用户终端，用于所述用户终端在所述第一用户专用CSI-RS端口上测量信号功率。其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息。
图18为本发明实施例中信道质量测量的控制方法1800的流程示意图。在一个示例中，该方法1800包括以下操作。
在步骤1801，基站通过常规配置信息通知用户终端UE在第一参 考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果。在一个示例中，所述基站可以根据所述第一测量结果进行多用户调度。
在步骤1802，所述基站在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
在步骤1803，所述基站接收所述用户终端发出的所述第二测量结果，从中获取第一CQI和第一偏移量，并根据所述第一CQI和所述第一偏移量还原出多用户CQI。
图19为本发明实施例中信道质量测量的控制方法1900的流程示意图。在一个示例中，该方法1900包括以下操作。
在步骤1901，基站通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果。在一个示例中，所述基站可以根据所述第一测量结果进行多用户调度。
在步骤1902，所述基站在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
在步骤1903，所述基站接收所述用户终端发出的所述第二测量结果，从中获取MCS指示和第二偏移量，并根据所述MCS指示和所述第二偏移量还原出多用户CQI。
此外，本申请还公开了用于使计算机执行图1、2、4-10、13-19所示方法的程序以及存储该程序的非易失性机器可读存储介质。
图20为本发明实施例中用户终端2000的结构示意图。在一个示例中，该用户终端2000包括：处理器2001，非易失性机器可读存储介质2002；以及存储在该非易失性机器可读存储介质2002中、由该处理器2001执行的程序模块2003。
在一个示例中，所述程序模块2003用于：在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
在一个示例中，所述程序模块2003包括：第一测量模块2013和第二测量模块2023。其中，所述第一测量模块2013用于在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站。所述第二测量模块2023用于检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
在一个示例中，所述程序模块2003用于：计算所述多用户调度使用的所有DMRS端口上资源元素RE的总功率；在分配给该用户终端的DMRS端口上进行信道估计，获得所述用户终端的信号功率；以及根据所述总功率和所述信号功率得到干扰功率。
在一个示例中，所述程序模块2003用于：在分配给所述用户终端的DMRS端口上进行信道估计，获得该用户终端的信号功率；以及在与该用户终端联合调度的其他用户终端分配到的DMRS端口上分别进行信道估计得到干扰功率。
在一个示例中，所述程序模块2003用于：接收所述基站在零功率CSI-RS端口中分配给该用户终端的RE上发送的与该用户终端联合调度的其他用户终端的数据信号；在分配给该用户终端的DMRS端口进行信道估计，获得所述用户终端的信号功率；以及该用户终端在所述零功率CSI-RS端口中分配给自身使用的RE上测量干扰功率。
在一个示例中，所述程序模块2003用于：接收所述基站通过第一下行控制信息DCI提供的一个或多个第一用户专用CSI-RS端口的指示信息，所述第一用户专用CSI-RS端口由所述基站从所述预先设置的用户专用CSI-RS端口中选出；其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息；在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功率；计算在所述预先设置的用户专用CSI-RS端口上所有RE的总功率，并根据该总功率和所述信号功率得到干扰功率。
在一个示例中，所述程序模块2003用于：接收所述基站通过第一下行控制信息DCI提供的一个或多个第一用户专用CSI-RS端口的指示信息，所述第一用户专用CSI-RS端口由所述基站从所述预先设置的用户专用CSI-RS端口中选出；其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息；在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功率；在第二用户专用CSI-RS端口进行信道估计获得所述干扰功率，所述第二用户专用CSI-RS端口为所述预先设置的用户专用CSI-RS端口中除去所述第一用户专用CSI-RS端口之外的一个或多个其他用户专用CSI-RS端口。
在一个示例中，所述程序模块2003用于：从所述预先设置的用户专用CSI-RS端口中选出一个或多个第一用户专用CSI-RS端口，并在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功 率；计算所述预先设置的用户专用CSI-RS端口上所有RE的总功率，并根据该总功率和所述信号功率得到干扰功率。
在一个示例中，所述程序模块2003用于：从所述预先设置的用户专用CSI-RS端口中选出一个或多个第一用户专用CSI-RS端口，并在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功率；在第二用户专用CSI-RS端口进行信道估计获得所述干扰功率，所述第二用户专用CSI-RS端口为所述预先设置的用户专用CSI-RS端口中除去所述第一用户专用CSI-RS端口之外的一个或多个其他用户专用CSI-RS端口。
在一个示例中，所述程序模块2003用于：根据所述信号功率和所述干扰功率生成多用户信道质量指示CQI；将所述多用户CQI添加到所述第二测量结果中发送给所述基站；或者，将所述第一测量结果中的第一CQI修改为所述多用户CQI后，发送给所述基站。
在一个示例中，所述程序模块2003用于：根据所述信号功率和所述干扰功率生成多用户CQI；确定第一CQI和所述多用户CQI之间的第一偏移量，并将所述第一CQI和所述第一偏移量发送给所述基站。
在一个示例中，所述程序模块2003用于：根据所述信号功率和所述干扰功率生成多用户CQI；从第二DCI中获得调制与编码策略MCS指示，确定所述MCS指示和所述多用户CQI之间的第二偏移量；其中，所述第二DCI用于指示物理下行共享信道PDSCH传输信息；将所述MCS指示和所述第二偏移量发送给所述基站。
在一个示例中，所述程序模块2003用于：读取用户专用高层信令或者第一DCI中携带的多用户CQI信息位；其中，所述第一DCI 用于指示物理上行共享信道PUSCH反馈信息；当所述多用户CQI信息位指示需要进行多用户CQI测量时，检测是否接收到自身的数据信号；如果接收到，则确定该触发条件被满足。
在一个示例中，所述程序模块2003用于：接收所述基站发出的第三DCI，该第三DCI用于指示物理上行共享信道PUSCH反馈信息和物理下行共享信道PDSCH传输信息；读取所述第三DCI中携带的多用户CQI信息位；当所述多用户CQI信息位指示需要进行多用户CQI测量时，检测是否接收到自身的数据信号；如果接收到，则确定该触发条件被满足。
在一个示例中，所述程序模块2003用于：当在子帧n接收到所述多用户CQI信息位时，判断该用户终端是否在子帧(n-k1)到子帧(n+k2)之间接收到所述数据信号，如果接收到则确定该触发条件被满足；其中，所述k1大于等于(-k2)，所述k2大于等于0；其中，所述用户终端在子帧(n+k3)反馈所述第二测量结果，其中k3大于k2。
在一个示例中，所述程序模块2003用于：当接收到第二DCI时，判断在测量窗口是否存在CSI-RS反馈时机；其中，所述第二DCI用于指示物理下行共享信道PDSCH传输信息；如果存在所述CSI-RS反馈时机，则确定该触发条件被满足。
图21为本发明实施例中基站2100的结构示意图。在一个示例中，该基站2100包括：处理器2101、非易失性机器可读存储介质2102；以及存储在该非易失性机器可读存储介质2102中、由该处理器2101执行的程序模块2103。
在一个示例中，所述程序模块2103用于：通过常规配置信息通 知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果；根据所述第一测量结果进行多用户调度，并在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
在一个示例中，所述程序模块2103用于：在用户专用高层信令或者第一DCI中增加多用户CQI信息位，并将该多用户CQI信息位设置为打开后，发送给所述用户终端，用于触发该用户终端进行所述第二类型测量。其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息。
在一个示例中，所述程序模块2103用于：构造用于指示物理上行共享信道PUSCH反馈信息和物理下行共享信道PDSCH传输信息的第三DCI；将所述第三DCI的多用户CQI信息位设置为打开后，发送给所述用户终端，用于触发该用户终端进行所述第二类型测量。
在一个示例中，所述程序模块2103用于：在零功率CSI-RS端口中分配给该用户终端使用的RE上发送与该用户终端联合调度的其他用户终端的数据信号，使得所述用户终端在所述分配给自身的RE上测量干扰功率，并使得与该用户终端联合调度的其他用户终端在该RE上接收数据信号。
在一个示例中，所述程序模块2103用于：从CSI-RS端口中预先划分出一组用户专用CSI-RS端口作为所述第二参考信号端口，用于所述用户终端计算在所述用户专用CSI-RS端口上所有RE的总功率；从所述用户专用CSI-RS端口中选出一个或多个第一用户专用CSI-RS端口，通过第一下行控制信息DCI将所述第一用户专用CSI-RS端口指示给该用户终端，用于所述用户终端在所述第一用户专用CSI-RS 端口上测量信号功率。其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息。
在一个示例中，所述程序模块2103用于：接收所述用户终端发出的所述第二测量结果，从中获取第一CQI和第一偏移量，并根据所述第一CQI和所述第一偏移量还原出多用户CQI。
在一个示例中，所述程序模块2103用于：接收所述用户终端发出的所述第二测量结果，从中获取MCS指示和第二偏移量，并根据所述MCS指示和所述第二偏移量还原出多用户CQI。
<硬件结构>
另外，上述实施方式的说明中使用的框图示出了以功能为单位的块。这些功能块(结构单元)通过硬件和/或软件的任意组合来实现。此外，各功能块的实现手段并不特别限定。即，各功能块可以通过在物理上和/或逻辑上相结合的一个装置来实现，也可以将在物理上和/或逻辑上相分离的两个以上装置直接地和/或间接地(例如通过有线和/或无线)连接从而通过上述多个装置来实现。
例如，本发明的一实施方式中的无线基站、用户终端等可以作为执行本发明的无线通信方法的处理的计算机来发挥功能。图22是示出本发明的一实施方式所涉及的无线基站和用户终端的硬件结构的一例的图。上述的无线基站10和用户终端20可以作为在物理上包括处理器1001、内存1002、存储器1003、通信装置1004、输入装置1005、输出装置1006、总线1007等的计算机装置来构成。
另外，在以下的说明中，“装置”这样的文字也可替换为电路、设备、单元等。无线基站10和用户终端20的硬件结构可以包括一个或多个图中所示的各装置，也可以不包括部分装置。
例如，处理器1001仅图示出一个，但也可以为多个处理器。此 外，可以通过一个处理器来执行处理，也可以通过一个以上的处理器同时、依次、或采用其它方法来执行处理。另外，处理器1001可以通过一个以上的芯片来安装。
无线基站10和用户终端20中的各功能例如通过如下方式实现：通过将规定的软件(程序)读入到处理器1001、内存1002等硬件上，从而使处理器1001进行运算，对由通信装置1004进行的通信进行控制，并对内存1002和存储器1003中的数据的读出和/或写入进行控制。
处理器1001例如使操作系统进行工作从而对计算机整体进行控制。处理器1001可以由包括与周边装置的接口、控制装置、运算装置、寄存器等的中央处理器(CPU，Central Processing Unit)构成。
此外，处理器1001将程序(程序代码)、软件模块、数据等从存储器1003和/或通信装置1004读出到内存1002，并根据它们执行各种处理。作为程序，可以采用使计算机执行在上述实施方式中说明的动作中的至少一部分的程序。
内存1002是计算机可读取记录介质，例如可以由只读存储器(ROM，Read Only Memory)、可编程只读存储器(EPROM，Erasable Programmable ROM)、电可编程只读存储器(EEPROM，Electrically EPROM)、随机存取存储器(RAM，Random Access Memory)、其它适当的存储介质中的至少一个来构成。内存1002也可以称为寄存器、高速缓存、主存储器(主存储装置)等。内存1002可以保存用于实施本发明的一实施方式所涉及的无线通信方法的可执行程序(程序代码)、软件模块等。
存储器1003是计算机可读取记录介质，例如可以由软磁盘(flexible disk)、软(注册商标)盘(floppy disk)、磁光盘(例如， 只读光盘(CD-ROM(Compact Disc ROM)等)、数字通用光盘、蓝光(Blu-ray，注册商标)光盘)、可移动磁盘、硬盘驱动器、智能卡、闪存设备(例如，卡、棒(stick)、密钥驱动器(key driver))、磁条、数据库、服务器、其它适当的存储介质中的至少一个来构成。存储器1003也可以称为辅助存储装置。
通信装置1004是用于通过有线和/或无线网络进行计算机间的通信的硬件(发送接收设备)，例如也称为网络设备、网络控制器、网卡、通信模块等。通信装置1004为了实现例如频分双工(FDD，Frequency Division Duplex)和/或时分双工(TDD，Time Division Duplex)，可以包括高频开关、双工器、滤波器、频率合成器等。
输入装置1005是接受来自外部的输入的输入设备(例如，键盘、鼠标、麦克风、开关、按钮、传感器等)。输出装置1006是实施向外部的输出的输出设备(例如，显示器、扬声器、发光二极管(LED，Light Emitting Diode)灯等)。另外，输入装置1005和输出装置1006也可以为一体的结构(例如触控面板)。
此外，处理器1001、内存1002等各装置通过用于对信息进行通信的总线1007连接。总线1007可以由单一的总线构成，也可以由装置间不同的总线构成。
此外，无线基站10和用户终端20可以包括微处理器、数字信号处理器(DSP，Digital Signal Processor)、专用集成电路(ASIC，Application Specific Integrated Circuit)、可编程逻辑器件(PLD，Programmable Logic Device)、现场可编程门阵列(FPGA，Field Programmable Gate Array)等硬件，可以通过该硬件来实现各功能块的部分或全部。例如，处理器1001可以通过这些硬件中的至少一个来安装。
(变形例)
另外，关于本说明书中说明的用语和/或对本说明书进行理解所需的用语，可以与具有相同或类似含义的用语进行互换。例如，信道和/或符号也可以为信号(信令)。此外，信号也可以为消息。参考信号也可以简称为RS(Reference Signal)，根据所适用的标准，也可以称为导频(Pilot)、导频信号等。此外，分量载波(CC，Component Carrier)也可以称为小区、频率载波、载波频率等。
此外，无线帧在时域中可以由一个或多个期间(帧)构成。构成无线帧的该一个或多个期间(帧)中的每一个也可以称为子帧。进而，子帧在时域中可以由一个或多个时隙构成。子帧可以是不依赖于参数配置(numerology)的固定的时间长度(例如1ms)。
进而，时隙在时域中可以由一个或多个符号(正交频分复用(OFDM，Orthogonal Frequency Division Multiplexing)符号、单载波频分多址(SC-FDMA，Single Carrier Frequency Division Multiple Access)符号等)构成。此外，时隙也可以是基于参数配置的时间单元。此外，时隙还可以包括多个微时隙。各微时隙在时域中可以由一个或多个符号构成。此外，微时隙也可以称为子时隙。
无线帧、子帧、时隙、微时隙以及符号均表示传输信号时的时间单元。无线帧、子帧、时隙、微时隙以及符号也可以使用各自对应的其它名称。例如，一个子帧可以被称为传输时间间隔(TTI，Transmission Time Interval)，多个连续的子帧也可以被称为TTI，一个时隙或一个微时隙也可以被称为TTI。也就是说，子帧和/或TTI可以是现有的LTE中的子帧(1ms)，也可以是短于1ms的期间(例如1～13个符号)，还可以是长于1ms的期间。另外，表示TTI的单元也可以称为时隙、微时隙等而非子帧。
在此，TTI例如是指无线通信中调度的最小时间单元。例如，在LTE系统中，无线基站对各用户终端进行以TTI为单位分配无线资源(在各用户终端中能够使用的频带宽度、发射功率等)的调度。另外，TTI的定义不限于此。
TTI可以是经过信道编码的数据包(传输块)、码块、和/或码字的发送时间单元，也可以是调度、链路适配等的处理单元。另外，在给出TTI时，实际上与传输块、码块、和/或码字映射的时间区间(例如符号数)也可以短于该TTI。
另外，一个时隙或一个微时隙被称为TTI时，一个以上的TTI(即一个以上的时隙或一个以上的微时隙)也可以成为调度的最小时间单元。此外，构成该调度的最小时间单元的时隙数(微时隙数)可以受到控制。
具有1ms时间长度的TTI也可以称为常规TTI(LTE Rel.8-12中的TTI)、标准TTI、长TTI、常规子帧、标准子帧、或长子帧等。短于常规TTI的TTI也可以称为压缩TTI、短TTI、部分TTI(partial或fractional TTI)、压缩子帧、短子帧、微时隙、或子时隙等。
另外，长TTI(例如常规TTI、子帧等)也可以用具有超过1ms的时间长度的TTI来替换，短TTI(例如压缩TTI等)也可以用具有比长TTI的TTI长度短且1ms以上的TTI长度的TTI来替换。
资源块(RB，Resource Block)是时域和频域的资源分配单元，在频域中，可以包括一个或多个连续的副载波(子载波(subcarrier))。此外，RB在时域中可以包括一个或多个符号，也可以为一个时隙、一个微时隙、一个子帧或一个TTI的长度。一个TTI、一个子帧可以分别由一个或多个资源块构成。另外，一个或多个RB也可以称为物理资源块(PRB，Physical RB)、子载波组(SCG，Sub-Carrier Group)、 资源单元组(REG，Resource Element Group)、PRG对、RB对等。
此外，资源块也可以由一个或多个资源单元(RE，Resource Element)构成。例如，一个RE可以是一个子载波和一个符号的无线资源区域。
另外，上述的无线帧、子帧、时隙、微时隙以及符号等的结构仅仅为示例。例如，无线帧中包括的子帧数、每个子帧或无线帧的时隙数、时隙内包括的微时隙数、时隙或微时隙中包括的符号和RB的数目、RB中包括的子载波数、以及TTI内的符号数、符号长度、循环前缀(CP，Cyclic Prefix)长度等的结构可以进行各种各样的变更。
此外，本说明书中说明的信息、参数等可以用绝对值来表示，也可以用与规定值的相对值来表示，还可以用对应的其它信息来表示。例如，无线资源可以通过规定的索引来指示。进一步地，使用这些参数的公式等也可以与本说明书中明确公开的不同。
在本说明书中用于参数等的名称在任何方面都并非限定性的。例如，各种各样的信道(物理上行链路控制信道(PUCCH，Physical Uplink Control Channel)、物理下行链路控制信道(PDCCH，Physical Downlink Control Channel)等)和信息单元可以通过任何适当的名称来识别，因此为这些各种各样的信道和信息单元所分配的各种各样的名称在任何方面都并非限定性的。
本说明书中说明的信息、信号等可以使用各种各样不同技术中的任意一种来表示。例如，在上述的全部说明中可能提及的数据、命令、指令、信息、信号、比特、符号、芯片等可以通过电压、电流、电磁波、磁场或磁性粒子、光场或光子、或者它们的任意组合来表示。
此外，信息、信号等可以从上层向下层、和/或从下层向上层输出。信息、信号等可以经由多个网络节点进行输入或输出。
输入或输出的信息、信号等可以保存在特定的场所(例如内存)，也可以通过管理表进行管理。输入或输出的信息、信号等可以被覆盖、更新或补充。输出的信息、信号等可以被删除。输入的信息、信号等可以被发往其它装置。
信息的通知并不限于本说明书中说明的方式/实施方式，也可以通过其它方法进行。例如，信息的通知可以通过物理层信令(例如，下行链路控制信息(DCI，Downlink Control Information)、上行链路控制信息(UCI，Uplink Control Information))、上层信令(例如，无线资源控制(RRC，Radio Resource Control)信令、广播信息(主信息块(MIB，Master Information Block)、系统信息块(SIB，System Information Block)等)、媒体存取控制(MAC，Medium Access Control)信令)、其它信号或者它们的组合来实施。
另外，物理层信令也可以称为L1/L2(第1层/第2层)控制信息(L1/L2控制信号)、L1控制信息(L1控制信号)等。此外，RRC信令也可以称为RRC消息，例如可以为RRC连接建立(RRC Connection Setup)消息、RRC连接重配置(RRC Connection Reconfiguration)消息等。此外，MAC信令例如可以通过MAC控制单元(MAC CE(Control Element))来通知。
此外，规定信息的通知(例如，“为X”的通知)并不限于显式地进行，也可以隐式地(例如，通过不进行该规定信息的通知，或者通过其它信息的通知)进行。
关于判定，可以通过由1比特表示的值(0或1)来进行，也可以通过由真(true)或假(false)表示的真假值(布尔值)来进行，还可以通过数值的比较(例如与规定值的比较)来进行。
软件无论被称为软件、固件、中间件、微代码、硬件描述语言， 还是以其它名称来称呼，都应宽泛地解释为是指命令、命令集、代码、代码段、程序代码、程序、子程序、软件模块、应用程序、软件应用程序、软件包、例程、子例程、对象、可执行文件、执行线程、步骤、功能等。
此外，软件、命令、信息等可以经由传输介质被发送或接收。例如，当使用有线技术(同轴电缆、光缆、双绞线、数字用户线路(DSL，Digital Subscriber Line)等)和/或无线技术(红外线、微波等)从网站、服务器、或其它远程资源发送软件时，这些有线技术和/或无线技术包括在传输介质的定义内。
本说明书中使用的“系统”和“网络”这样的用语可以互换使用。
在本说明书中，“基站(BS，Base Station)”、“无线基站”、“eNB”、“gNB”、“小区”、“扇区”、“小区组”、“载波”以及“分量载波”这样的用语可以互换使用。基站有时也以固定台(fixed station)、NodeB、eNodeB(eNB)、接入点(access point)、发送点、接收点、毫微微小区、小小区等用语来称呼。
基站可以容纳一个或多个(例如三个)小区(也称为扇区)。当基站容纳多个小区时，基站的整个覆盖区域可以划分为多个更小的区域，每个更小的区域也可以通过基站子系统(例如，室内用小型基站(射频拉远头(RRH，Remote Radio Head)))来提供通信服务。“小区”或“扇区”这样的用语是指在该覆盖中进行通信服务的基站和/或基站子系统的覆盖区域的一部分或整体。
在本说明书中，“移动台(MS，Mobile Station)”、“用户终端(user terminal)”、“用户装置(UE，User Equipment)”以及“终端”这样的用语可以互换使用。基站有时也以固定台(fixed station)、NodeB、eNodeB(eNB)、接入点(access point)、发送点、接收点、毫微微 小区、小小区等用语来称呼。
移动台有时也被本领域技术人员以用户台、移动单元、用户单元、无线单元、远程单元、移动设备、无线设备、无线通信设备、远程设备、移动用户台、接入终端、移动终端、无线终端、远程终端、手持机、用户代理、移动客户端、客户端或者若干其它适当的用语来称呼。
此外，本说明书中的无线基站也可以用用户终端来替换。例如，对于将无线基站和用户终端间的通信替换为多个用户终端间(D2D，Device-to-Device)的通信的结构，也可以应用本发明的各方式/实施方式。此时，可以将上述的无线基站10所具有的功能当作用户终端20所具有的功能。此外，“上行”和“下行”等文字也可以替换为“侧”。例如，上行信道也可以替换为侧信道。
同样，本说明书中的用户终端也可以用无线基站来替换。此时，可以将上述的用户终端20所具有的功能当作无线基站10所具有的功能。
在本说明书中，设为通过基站进行的特定动作根据情况有时也通过其上级节点(upper node)来进行。显然，在具有基站的由一个或多个网络节点(network nodes)构成的网络中，为了与终端间的通信而进行的各种各样的动作可以通过基站、除基站之外的一个以上的网络节点(可以考虑例如移动管理实体(MME，Mobility Management Entity)、服务网关(S-GW，Serving-Gateway)等，但不限于此)、或者它们的组合来进行。
本说明书中说明的各方式/实施方式可以单独使用，也可以组合使用，还可以在执行过程中进行切换来使用。此外，本说明书中说明的各方式/实施方式的处理步骤、序列、流程图等只要没有矛盾，就可以更换顺序。例如，关于本说明书中说明的方法，以示例性的顺序 给出了各种各样的步骤单元，而并不限定于给出的特定顺序。
本说明书中说明的各方式/实施方式可以应用于利用长期演进(LTE，Long Term Evolution)、高级长期演进(LTE-A，LTE-Advanced)、超越长期演进(LTE-B，LTE-Beyond)、超级第3代移动通信系统(SUPER 3G)、高级国际移动通信(IMT-Advanced)、第4代移动通信系统(4G，4th generation mobile communication system)、第5代移动通信系统(5G，5th generation mobile communication system)、未来无线接入(FRA，Future Radio Access)、新无线接入技术(New-RAT，Radio Access Technology)、新无线(NR，New Radio)、新无线接入(NX，New radio access)、新一代无线接入(FX，Future generation radio access)、全球移动通信系统(GSM(注册商标)，Global System for Mobile communications)、码分多址接入2000(CDMA2000)、超级移动宽带(UMB，Ultra Mobile Broadband)、IEEE 802.11(Wi-Fi(注册商标))、IEEE 802.16(WiMAX(注册商标))、IEEE 802.20、超宽带(UWB，Ultra-WideBand)、蓝牙(Bluetooth(注册商标))、其它适当的无线通信方法的系统和/或基于它们而扩展的下一代系统。
本说明书中使用的“根据”这样的记载，只要未在其它段落中明确记载，则并不意味着“仅根据”。换言之，“根据”这样的记载是指“仅根据”和“至少根据”这两者。
本说明书中使用的对使用“第一”、“第二”等名称的单元的任何参照，均非全面限定这些单元的数量或顺序。这些名称可以作为区别两个以上单元的便利方法而在本说明书中使用。因此，第一单元和第二单元的参照并不意味着仅可采用两个单元或者第一单元必须以若干形式占先于第二单元。
本说明书中使用的“判断(确定)(determining)”这样的用语有时包含多种多样的动作。例如，关于“判断(确定)”，可以将计算(calculating)、推算(computing)、处理(processing)、推导(deriving)、调查(investigating)、搜索(looking up)(例如表、数据库、或其它数据结构中的搜索)、确认(ascertaining)等视为是进行“判断(确定)”。此外，关于“判断(确定)”，也可以将接收(receiving)(例如接收信息)、发送(transmitting)(例如发送信息)、输入(input)、输出(output)、存取(accessing)(例如存取内存中的数据)等视为是进行“判断(确定)”。此外，关于“判断(确定)”，还可以将解决(resolving)、选择(selecting)、选定(choosing)、建立(establishing)、比较(comparing)等视为是进行“判断(确定)”。也就是说，关于“判断(确定)”，可以将若干动作视为是进行“判断(确定)”。
本说明书中使用的“连接的(connected)”、“结合的(coupled)”这样的用语或者它们的任何变形是指两个或两个以上单元间的直接的或间接的任何连接或结合，可以包括以下情况：在相互“连接”或“结合”的两个单元间，存在一个或一个以上的中间单元。单元间的结合或连接可以是物理上的，也可以是逻辑上的，或者还可以是两者的组合。例如，“连接”也可以替换为“接入”。在本说明书中使用时，可以认为两个单元是通过使用一个或一个以上的电线、线缆、和/或印刷电气连接，以及作为若干非限定性且非穷尽性的示例，通过使用具有射频区域、微波区域、和/或光(可见光及不可见光这两者)区域的波长的电磁能等，被相互“连接”或“结合”。
在本说明书或权利要求书中使用“包括(including)”、“包含(comprising)”、以及它们的变形时，这些用语与用语“具备”同样是开放式的。进一步地，在本说明书或权利要求书中使用的用语“或 (or)”并非是异或。
以上对本发明进行了详细说明，但对于本领域技术人员而言，显然，本发明并非限定于本说明书中说明的实施方式。本发明在不脱离由权利要求书的记载所确定的本发明的宗旨和范围的前提下，可以作为修改和变更方式来实施。因此，本说明书的记载是以示例说明为目的，对本发明而言并非具有任何限制性的意义。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明保护的范围之内。

Claims (36)

  1. 一种信道质量反馈方法，其特征在于，包括：
    用户终端UE在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；
    检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
  2. 根据权利要求1所述的方法，其特征在于，所述第二参考信号端口为解调导频DMRS端口，则所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量包括：
    计算所述多用户调度使用的所有DMRS端口上资源元素RE的总功率；
    在分配给该用户终端的DMRS端口上进行信道估计，获得所述用户终端的信号功率；以及
    根据所述总功率和所述信号功率得到干扰功率。
  3. 根据权利要求1所述的方法，其特征在于，所述第二参考信号端口为DMRS端口，则所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量包括：
    在分配给所述用户终端的DMRS端口上进行信道估计，获得该用户终端的信号功率；以及
    在与该用户终端联合调度的其他用户终端分配到的DMRS端口上分别进行信道估计得到干扰功率。
  4. 根据权利要求1所述的方法，其特征在于，进一步包括：接收所述基站在分配给零功率CSI-RS端口使用的RE上发送的与该用户终端联合调度的其他用户终端的数据信号；以及
    所述第二参考信号端口为DMRS端口，则所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量包括：
    在分配给该用户终端的DMRS端口进行信道估计，获得所述用户终端的信号功率；以及
    该用户终端在所述分配给零功率CSI-RS端口使用的RE上测量干扰功率。
  5. 根据权利要求1所述的方法，其特征在于，所述第二参考信号端口为一组预先设置的用户专用CSI-RS端口；
    该方法进一步包括：接收所述基站通过第一下行控制信息DCI提供的一个或多个第一用户专用CSI-RS端口的指示信息，所述第一用户专用CSI-RS端口由所述基站从所述预先设置的用户专用CSI-RS端口中选出；其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息；
    则所述用户终端在所述第二参考信号端口进行多用户调度时的信道质量测量包括：
    在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功率；
    计算在所述预先设置的用户专用CSI-RS端口上所有RE的总功率，并根据该总功率和所述信号功率得到干扰功率；或者，在第二用户专用CSI-RS端口进行信道估计获得所述干扰功率，所述第二用户专用CSI-RS端口为所述预先设置的用户专用CSI-RS端口中除去所述第一用户专用CSI-RS端口之外的一个或多个其他用户专用CSI-RS端口。
  6. 根据权利要求1所述的方法，其特征在于，所述第二参考信号端口为一组预先设置的用户专用CSI-RS端口，则所述用户终端在 所述第二参考信号端口进行多用户调度时的信道质量测量包括：
    该用户终端从所述预先设置的用户专用CSI-RS端口中选出一个或多个第一用户专用CSI-RS端口，并在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功率；
    计算所述预先设置的用户专用CSI-RS端口上所有RE的总功率，并根据该总功率和所述信号功率得到干扰功率；或者，在第二用户专用CSI-RS端口进行信道估计获得所述干扰功率，所述第二用户专用CSI-RS端口为所述预先设置的用户专用CSI-RS端口中除去所述第一用户专用CSI-RS端口之外的一个或多个其他用户专用CSI-RS端口。
  7. 根据权利要求2-6任一项所述的方法，其特征在于，所述得到第二测量结果反馈给基站包括：
    根据所述信号功率和所述干扰功率生成多用户信道质量指示CQI；
    将所述多用户CQI添加到所述第二测量结果中发送给所述基站；或者，将所述第一测量结果中的第一CQI修改为所述多用户CQI后，发送给所述基站。
  8. 根据权利要求7所述的方法，其特征在于，所述根据所述信号功率和所述干扰功率生成多用户信道质量指示CQI包括：
    确定该用户终端在每个子带上的信号功率，并估计每个子带上该用户终端的干扰功率，根据每个子带上所述信号功率和所述干扰功率的比值确定该子带上的多用户SINR，并根据该多用户SINR得到该子带上的多用户CQI；
    在根据从基站接收到的资源分配类型确定需要计算该用户终端的宽带多用户CQI时，将所有子带上的多用户SINR取平均后量化，得到宽带多用户CQI。
  9. 根据权利要求2-6任一项所述的方法，其特征在于，所述得到第二测量结果反馈给基站包括：
    根据所述信号功率和所述干扰功率生成多用户CQI；
    确定所述第一测量结果中的第一CQI和所述多用户CQI之间的第一偏移量，并将所述第一CQI和所述第一偏移量发送给所述基站。
  10. 根据权利要求2-6任一项所述的方法，其特征在于，所述得到第二测量结果反馈给基站包括：
    根据所述信号功率和所述干扰功率生成多用户CQI；
    从第二DCI中获得调制与编码策略MCS指示，确定所述MCS指示和所述多用户CQI之间的第二偏移量；其中，所述第二DCI用于指示物理下行共享信道PDSCH传输信息；
    将所述MCS指示和所述第二偏移量发送给所述基站。
  11. 根据权利要求1所述的方法，其特征在于，所述检测第二类型测量的触发条件是否满足包括：
    所述用户终端读取用户专用高层信令或者第一DCI中携带的多用户CQI信息位；其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息；
    当所述多用户CQI信息位指示需要进行多用户CQI测量时，所述用户终端检测是否接收到自身的数据信号；
    如果接收到，则确定该触发条件被满足。
  12. 根据权利要求1所述的方法，其特征在于，进一步包括：接收所述基站发出的第三DCI，该第三DCI用于指示物理上行共享信道PUSCH反馈信息和物理下行共享信道PDSCH传输信息；
    所述检测第二类型测量的触发条件是否满足包括：
    所述用户终端读取所述第三DCI中携带的多用户CQI信息位；
    当所述多用户CQI信息位指示需要进行多用户CQI测量时，所述用户终端检测是否接收到自身的数据信号；
    如果接收到，则确定该触发条件被满足。
  13. 根据权利要求11或12所述的方法，其特征在于，所述用户终端检测是否接收到自身的数据信号包括：
    当所述用户终端在子帧n接收到所述多用户CQI信息位时，判断该用户终端是否在子帧(n-k1)到子帧(n+k2)之间接收到所述数据信号，如果接收到则确定该触发条件被满足；其中，所述k1大于等于(-k2)，所述k2大于等于0；
    其中，所述用户终端在子帧(n+k3)反馈所述第二测量结果，其中k3大于k2。
  14. 根据权利要求1所述的方法，其特征在于，所述检测第二类型测量的触发条件是否满足包括：
    当所述用户终端接收到第二DCI时，判断在测量窗口是否存在CSI-RS反馈时机；其中，所述第二DCI用于指示物理下行共享信道PDSCH传输信息；
    如果存在所述CSI-RS反馈时机，则确定该触发条件被满足。
  15. 一种信道质量测量的控制方法，其特征在于，包括：
    基站通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果；
    所述基站根据所述第一测量结果进行多用户调度，并在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
  16. 根据权利要求15所述的方法，其特征在于，所述将第二类 型测量的触发条件设置为打开包括：
    所述基站在用户专用高层信令或者第一DCI中增加多用户CQI信息位，并将该多用户CQI信息位设置为打开后，发送给所述用户终端，用于触发该用户终端进行所述第二类型测量；
    其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息。
  17. 根据权利要求15所述的方法，其特征在于，所述将第二类型测量的触发条件设置为打开包括：
    所述基站构造用于指示物理上行共享信道PUSCH反馈信息和物理下行共享信道PDSCH传输信息的第三DCI，并将所述第三DCI的多用户CQI信息位设置为打开后，发送给所述用户终端，用于触发该用户终端进行所述第二类型测量。
  18. 根据权利要求15所述的方法，其特征在于，进一步包括：所述基站在零功率CSI-RS端口中分配给该用户终端使用的RE上发送与该用户终端联合调度的其他用户终端的数据信号，使得所述用户终端在所述分配给自身的RE上测量干扰功率，并使得与该用户终端联合调度的其他用户终端在该RE上接收数据信号。
  19. 根据权利要求15所述的方法，其特征在于，进一步包括：
    所述基站从CSI-RS端口中预先划分出一组用户专用CSI-RS端口作为所述第二参考信号端口，用于所述用户终端计算在所述用户专用CSI-RS端口上所有RE的总功率；
    从所述用户专用CSI-RS端口中选出一个或多个第一用户专用CSI-RS端口，通过第一下行控制信息DCI将所述第一用户专用CSI-RS端口指示给该用户终端，用于所述用户终端在所述第一用户专用CSI-RS端口上测量信号功率；
    其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息。
  20. 根据权利要求15所述的方法，其特征在于，进一步包括：
    所述基站接收所述用户终端发出的所述第二测量结果，从中获取第一CQI和第一偏移量，并根据所述第一CQI和所述第一偏移量还原出多用户CQI。
  21. 根据权利要求15所述的方法，其特征在于，进一步包括：
    所述基站接收所述用户终端发出的所述第二测量结果，从中获取MCS指示和第二偏移量，并根据所述MCS指示和所述第二偏移量还原出多用户CQI。
  22. 一种用户终端，其特征在于，包括：
    处理器；
    非易失性机器可读存储介质；以及
    存储在该非易失性机器可读存储介质中、由该处理器执行的程序模块；
    其中，所述程序模块用于：
    在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；
    检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
  23. 根据权利要求22所述的用户终端，其特征在于，所述程序模块用于：
    计算所述多用户调度使用的所有DMRS端口上资源元素RE的总功率；
    在分配给该用户终端的DMRS端口上进行信道估计，获得所述用户终端的信号功率；以及
    根据所述总功率和所述信号功率得到干扰功率。
  24. 根据权利要求22所述的用户终端，其特征在于，所述程序模块用于：
    在分配给所述用户终端的DMRS端口上进行信道估计，获得该用户终端的信号功率；以及
    在与该用户终端联合调度的其他用户终端分配到的DMRS端口上分别进行信道估计得到干扰功率。
  25. 根据权利要求22所述的用户终端，其特征在于，所述程序模块用于：
    接收所述基站在零功率CSI-RS端口中分配给该用户终端的RE上发送的与该用户终端联合调度的其他用户终端的数据信号；
    在分配给该用户终端的DMRS端口进行信道估计，获得所述用户终端的信号功率；以及
    该用户终端在所述零功率CSI-RS端口中分配给自身使用的RE上测量干扰功率。
  26. 根据权利要求22所述的用户终端，其特征在于，所述程序模块用于：
    接收所述基站通过第一下行控制信息DCI提供的一个或多个第一用户专用CSI-RS端口的指示信息，所述第一用户专用CSI-RS端口由所述基站从所述预先设置的用户专用CSI-RS端口中选出；其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息；
    在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功率；
    计算在所述预先设置的用户专用CSI-RS端口上所有RE的总功率，并根据该总功率和所述信号功率得到干扰功率；或者，在第二用户专用CSI-RS端口进行信道估计获得所述干扰功率，所述第二用户专用CSI-RS端口为所述预先设置的用户专用CSI-RS端口中除去所述第一用户专用CSI-RS端口之外的一个或多个其他用户专用CSI-RS端口。
  27. 根据权利要求22所述的用户终端，其特征在于，所述程序模块用于：
    从所述预先设置的用户专用CSI-RS端口中选出一个或多个第一用户专用CSI-RS端口，并在所述第一用户专用CSI-RS端口上测量所述用户终端的信号功率；
    计算所述预先设置的用户专用CSI-RS端口上所有RE的总功率，并根据该总功率和所述信号功率得到干扰功率；或者，在第二用户专用CSI-RS端口进行信道估计获得所述干扰功率，所述第二用户专用CSI-RS端口为所述预先设置的用户专用CSI-RS端口中除去所述第一用户专用CSI-RS端口之外的一个或多个其他用户专用CSI-RS端口。
  28. 一种基站，其特征在于，包括：
    处理器；
    非易失性机器可读存储介质；以及
    存储在该非易失性机器可读存储介质中、由该处理器执行的程序模块；
    其中，所述程序模块用于：
    通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果；
    根据所述第一测量结果进行多用户调度，并在该用户终端被调度 时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
  29. 根据权利要求28所述的基站，其特征在于，所述程序模块用于：
    在用户专用高层信令或者第一DCI中增加多用户CQI信息位，并将该多用户CQI信息位设置为打开后，发送给所述用户终端，用于触发该用户终端进行所述第二类型测量；
    其中，所述第一DCI用于指示物理上行共享信道PUSCH反馈信息。
  30. 根据权利要求28所述的基站，其特征在于，所述程序模块用于：
    构造用于指示物理上行共享信道PUSCH反馈信息和物理下行共享信道PDSCH传输信息的第三DCI；
    将所述第三DCI的多用户CQI信息位设置为打开后，发送给所述用户终端，用于触发该用户终端进行所述第二类型测量。
  31. 一种程序，其特征在于，用于使计算机执行以下操作：
    用户终端UE在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；
    检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
  32. 一种非易失性机器可读存储介质，其特征在于，所述存储介质中存储有机器可读指令，所述机器可读指令可以由处理器执行以完成以下操作：
    用户终端UE在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；
    检测第二类型测量的触发条件是否满足，当该触发条件得到满足时，所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
  33. 一种程序，其特征在于，用于使计算机执行以下操作：
    基站通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果；
    所述基站根据所述第一测量结果进行多用户调度，并在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
  34. 一种非易失性机器可读存储介质，其特征在于，所述存储介质中存储有机器可读指令，所述机器可读指令可以由处理器执行以完成以下操作：
    基站通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果；
    所述基站根据所述第一测量结果进行多用户调度，并在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
  35. 一种用户终端，其特征在于，包括：
    第一测量模块，用于在第一参考信号端口进行信道质量测量，得到第一测量结果反馈给基站；以及
    第二测量模块，用于检测第二类型测量的触发条件是否满足，当 该触发条件得到满足时，在第二参考信号端口进行多用户调度时的信道质量测量，得到第二测量结果反馈给基站。
  36. 一种基站，其特征在于，包括：
    第一测量控制模块，用于通过常规配置信息通知用户终端UE在第一参考信号端口进行信道质量测量，并接收该用户终端反馈的第一测量结果；以及
    第二测量控制模块，用于根据所述第一测量结果进行多用户调度，并在该用户终端被调度时，将第二类型测量的触发条件设置为打开，从而触发所述用户终端在第二参考信号端口进行多用户调度时的信道质量测量并反馈第二测量结果。
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