WO2018201910A1 - 波束信息反馈方法及用户装置 - Google Patents

波束信息反馈方法及用户装置 Download PDF

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Publication number
WO2018201910A1
WO2018201910A1 PCT/CN2018/083732 CN2018083732W WO2018201910A1 WO 2018201910 A1 WO2018201910 A1 WO 2018201910A1 CN 2018083732 W CN2018083732 W CN 2018083732W WO 2018201910 A1 WO2018201910 A1 WO 2018201910A1
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WO
WIPO (PCT)
Prior art keywords
beams
information
index
power
base station
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Application number
PCT/CN2018/083732
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English (en)
French (fr)
Inventor
李慧玲
那崇宁
柿岛佑一
永田聪
Original Assignee
株式会社Ntt都科摩
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 株式会社Ntt都科摩 filed Critical 株式会社Ntt都科摩
Priority to US16/607,123 priority Critical patent/US10763938B2/en
Priority to CN201880019072.7A priority patent/CN110603741B/zh
Publication of WO2018201910A1 publication Critical patent/WO2018201910A1/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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
    • 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
    • H04B7/0408—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas using two or more beams, i.e. beam diversity

Definitions

  • the present application relates to the field of wireless communications, and in particular to a beam feedback method performed by a user device, and a corresponding user device.
  • FD-MIMO Full-dimensional multiple input multiple output
  • Massive MIMO large-scale multiple input multiple output
  • a beam information feedback method performed by a user apparatus including: determining a first beam and a plurality of second beams according to a beam selection result; and determining beam power according to the plurality of second beams Transmitting, to the base station, a beam index of the plurality of second beams; transmitting the broadband beam information corresponding to the beam indexes of the plurality of second beams; and transmitting the subbands corresponding to the beam indexes of the plurality of second beams Beam information.
  • a user apparatus comprising: a determining unit configured to determine a first beam and a plurality of second beams according to a beam selection result; and a transmitting unit configured to be according to the plurality of second Beam power of the beam, transmitting a beam index of the plurality of second beams to the base station; transmitting broadband beam information corresponding to the beam indexes of the plurality of second beams, and corresponding to beam indexes of the plurality of second beams The subband beam information is transmitted.
  • the beam index of the plurality of second beams is transmitted to the base station according to the beam power of the plurality of second beams, and
  • the broadband beam information and the sub-band beam information are transmitted corresponding to the beam indexes of the plurality of second beams, and the base station can obtain the required information according to the beam index received from the user equipment even if the packet information is not transmitted to the base station.
  • FIG. 1 is a flow chart showing a beam information feedback method performed by a user device according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram showing determining a first beam and a plurality of second beams from beam selection results according to an embodiment of the present invention
  • 3A is a flowchart illustrating an example of transmitting beam indices of the plurality of second beams to a base station according to beam powers of the plurality of second beams, according to an embodiment of the present invention
  • FIG. 3B is a schematic diagram showing an example of transmitting beam indices of the plurality of second beams to a base station according to beam powers of the plurality of second beams according to an embodiment of the present invention
  • 4A is a flowchart showing another example of transmitting a beam index of the plurality of second beams to a base station according to beam powers of the plurality of second beams, according to an embodiment of the present invention
  • 4B is a diagram showing another example of transmitting a beam index of the plurality of second beams to a base station according to beam power of the plurality of second beams according to an embodiment of the present invention
  • FIG. 5 is a diagram showing feedback beam information by using a channel state indication (CSI) feedback type I and a channel state indication (CSI) feedback type II in common, according to an embodiment of the present invention
  • CSI channel state indication
  • FIG. 7 is a schematic diagram showing feedback of beam information to a base station by transmitting the number of dominant beams in the plurality of second beams according to an embodiment of the present invention
  • FIG. 8 is a diagram showing an example of determining the number of bits required for beam information of respective beams in a second beam according to an embodiment of the present invention.
  • 9A is a schematic diagram showing another example of determining the number of bits required for beam information of respective beams in a second beam according to an embodiment of the present invention.
  • 9B is a schematic diagram showing still another example of determining the number of bits required for beam information of each beam in the second beam according to an embodiment of the present invention.
  • FIG. 10 is a configuration diagram showing a user device according to an embodiment of the present invention.
  • FIG. 11 is a configuration diagram showing a hardware configuration of a user device according to an embodiment of the present invention.
  • feedback when performing beam information feedback, feedback may be made for the characteristics of the beam in the broadband, or for the features of the beam in the sub-band, wherein one broadband may include multiple sub-bands.
  • the parameters included in the beam information transmitted by the user equipment when the feedback is made for the characteristics of the beam in the broadband may be at least partially included in the beam information transmitted by the user equipment when the characteristics of the beam in the subband are fed back. different. Further, in the embodiment according to the present invention, the parameters included in the feedback information of the beams of different powers may be different.
  • FIG. 1 shows a flow chart of a beam information feedback method performed by a user device.
  • a first beam and a plurality of second beams are determined according to a beam selection result.
  • a base station may transmit a reference signal about a plurality of beams to a user equipment, and the user equipment may select the first beam and the available beam for the user equipment from among the beams transmitted by the base station according to the channel measurement result.
  • Multiple second beams may be used.
  • the first beam may have the highest beam power among the selected beams
  • the second beam may be a beam other than the first beam among the beams selected by the user equipment.
  • FIG. 2 shows an example of determining a first beam and a plurality of second beams from the beam selection result in step S101.
  • the base station transmits a reference signal for a plurality of beams to the user equipment, and the user equipment first selects the beam b1 from among the plurality of beams b1-b12 by an appropriate beam selection method (for example, according to the channel measurement result).
  • the beam power level of the first beam b1 is 1, the beam power level of the second beam b4 relative to the first beam b1 is 1/2, and the beam b8 is relative to the first beam b1
  • the beam power level is 1/8, and the beam power level of the beam b12 relative to the first beam b1 is 1/4, the beam b1 is determined as the first beam, and the beams b4, b8, b12 are determined as the second beam.
  • the beam power levels are predefined and the defined beam power levels are stored in association with the base station and the user equipment.
  • a beam index of the plurality of second beams is transmitted to the base station according to the beam power of the plurality of second beams.
  • the beam index may be included in a Precoding Matrix Indicator (PMI).
  • FIG. 3A shows a flow chart of this example, as shown in FIG. 3A, which may include two sub-steps in step S102.
  • the transmission order of the plurality of second beams is determined according to beam power.
  • beam indices of the plurality of second beams are transmitted to the base station according to the determined transmission order. Accordingly, the base station can obtain information about the beam power of the beam it indicates in accordance with the transmission order of the beam index.
  • FIG. 3B shows a schematic diagram of the example. As shown in FIG. 3B, the beams are arranged in the order of b4, b8, and b12 in descending order of beam power, and PMI-2, PMI-3, and PMI-4 are beams b4 and b12, respectively.
  • beam index of b8 and send the beam indexes PMI-2, PMI-3, PMI-4 of the arranged second beams b4, b12, b8 to the base station.
  • the beam indexes of the plurality of second beams arranged above may also be arranged in other orders, for example, in ascending order of beam power levels, and the ascending order beam index may be transmitted to the base station.
  • FIG. 4A shows a flow chart of this example, as shown in FIG. 4A, which may include two sub-steps in step S102.
  • the plurality of second beams may be divided into a first beam group and a second beam group according to beam power, wherein a beam power of a beam in the first beam group is smaller than a beam in the second beam group.
  • the beam power is high.
  • both the first beam group and the second beam group may include beams in one or more beam selection results, and in the case where the number of selected beams is large, the number of grouped beam groups is also It may not be limited to two.
  • a beam index arranged according to the first beam group and the second beam group is transmitted to the base station.
  • the beam index may not need to be ordered according to beam power within the first beam set and the second beam set.
  • the beam indices of the plurality of beams included in the first beam group or the second beam group may also be arranged, for example, according to the wave power, as described above, and the aligned beam index is transmitted to the base station.
  • the base station can obtain information about the beam power of the beam it indicates based on the number of beams included in the first beam group and/or the second beam group and the transmission order of the beam index. For example, as described above, it is assumed that the beam power levels of the second beams b4, b8, and b12 are 1/2, 1/4, and 1/8, respectively. Then, in step S1021b, the second beam b4 can be divided into a first beam group, and the second beam b8, b12 can be divided into a second beam group, and the first beam group and the second beam are transmitted to the base station in S1022b. Group indexed beam index.
  • FIG. 4B shows a schematic diagram of the example. As shown in FIG.
  • the second beam b4 is divided into a first beam group
  • the second beams b8, b12 are divided into a second beam group
  • the PMI-2 is a first beam group.
  • the beam index of the middle beam b4, and PMI-3 and PMI-4 are the beam indexes of the beams b8, b12 in the second beam group, wherein the beams b8, b12 in the second beam group may not be sorted. And transmitting corresponding beam indexes PMI-2, PMI-3, and PMI-4 to the base station in the order of the first beam group and the second beam group.
  • step S1021a b4 and b12 may be divided into a first beam group, and the second beam b8 may be divided into a second beam group, and PMI-2 and PMI-3 are first.
  • the beam index of beams b4, b12 in the beam set, and PMI-4 is the beam index of beam b8 in the second beam set.
  • step S103 broadband beam information is transmitted corresponding to the beam indexes of the plurality of second beams.
  • step S104 the sub-band beam information is transmitted corresponding to the beam indexes of the plurality of second beams.
  • the known channel state indication (CSI) feedback type I may send first channel state information to the base station, and the first channel state information may include a channel state feedback type indication (CTI), a rank (RI), a precoding matrix indicator ( PMI) and channel quality indication (CQI), and beam information, etc.; and channel state indication (CSI) feedback type II may send second channel state information to the base station, the second channel state information may include beam quantity information (eg, It is the dominant beam number information as described above), PMI, and beam information.
  • CTI channel state feedback type indication
  • RI rank
  • PMI precoding matrix indicator
  • CQI channel quality indication
  • the beam information may include broadband beam information and subband beam information
  • the broadband beam information may include broadband amplitude information
  • the subband beam information may include subband amplitude information and subband phase information.
  • the PMI can include a beam index.
  • the first channel state information and the second channel state information can each include beam information and a PMI. Therefore, the user equipment can transmit the broadband beam information and the subband beam corresponding to the beam indexes of the plurality of second beams by using channel state indication (CSI) feedback type I and/or channel state indication (CSI) feedback type II. information. It should be understood that the above-mentioned broadband beam information and sub-band beam information may be periodically or non-periodically transmitted to the base station.
  • CSI channel state indication
  • CSI channel state indication
  • FIG. 5 illustrates an example of feeding back beam information by using a channel state indication (CSI) feedback type I and a channel state indication (CSI) feedback type II, that is, transmitting the beam information in a differential manner.
  • the user equipment feeds back the beam index and subband beam information of the first beam using a channel state indication (CSI) feedback type I, and uses a channel state indication (CSI) feedback type.
  • II feeds back the beam index, broadband beam information, and subband beam information of the second beam.
  • FIG. 6 shows an example of feedback beam information only through channel state indication (CSI) feedback type II.
  • the user equipment transmits the beam index of the first beam, and the subband band beam information, and the beam index of the plurality of second beams, using only channel state indication (CSI) feedback type II, Wideband beam information and subband with beam information.
  • CSI channel state indication
  • the user equipment uses wideband amplitude information, subband amplitude information, subband phase information, and subband quadrature phase information of all beams to be fed back using channel state indication (CSI) feedback type II. Feedback is made to the base station.
  • CSI channel state indication
  • different bits may be allocated to the broadband beam information and the subband beam information of the second beam.
  • the signaling overhead for feeding back the beam information is different, in this way, the signaling overhead can be effectively saved.
  • FIG. 7 illustrates an example of feeding back beam information to a base station by transmitting the number of dominant beams in the plurality of second beams, wherein the beam power of the dominant beam is higher than the beam power of other beams in the second beam set.
  • a new one is transmitted.
  • the feedback type is the dominant beam quantity information K
  • the dominant beam quantity information K indicates the number of dominant beams in the plurality of second beams.
  • the dominant beam quantity information K is also directly fed back to the base station by the beam information to be fed back, so that the base station can know that in addition to the first beam, there are K strong beams in the second beam to be fed back, correspondingly The remaining second beam is considered to be fed back as a weak beam.
  • the base station in combination with the dominant beam number information K, can know which specific beams are dominant beams (ie, strong beams), those The beam is a weak beam.
  • the transmission sequence of the second beam is as shown in FIG. 3B, and the dominant beam quantity information K to be transmitted is 1, that is, the base station is fed back the advantages of the plurality of second beams.
  • the number of beams is one, and beam b4 is the dominant beam in the second beam.
  • b8 and b12 are weak beams in the second beam.
  • a beam power threshold may be determined in advance, and the beam power threshold is compared with the power of the plurality of second beams. And determining a dominant beam in the plurality of second beams, wherein a beam power of the dominant beam is higher than a beam power of other beams in the second beam group.
  • the plurality of second beams can be divided into a first beam group and a second beam group.
  • the beam power threshold is set to 1/2 in advance, and the plurality of second beams are compared with the set power threshold. If the second beam is greater than or equal to the power threshold, the second beam is a dominant beam. , that is, strong beam.
  • the second beam is less than the power threshold, the second beam is a weak beam.
  • the power level of the selected first beam b1 is 1, the beam power level of the second beam b4 relative to the first beam b1 is 1/2, and the beam b8 is relative to the first beam.
  • the beam power level of b1 is 1/8, and the beam power level of beam b12 relative to the first beam b1 is 1/4, then beam b4 is the dominant beam in the second beam, and b8, b12 is weak in the second beam. Beam.
  • step S102 the beam index arranged according to the first beam group and the second beam group is sent to the base station, and corresponding to the beam indexes of the plurality of second beams are respectively sent in steps S103 and S104.
  • Wideband beam information and subband beam information are sent to the base station, and corresponding to the beam indexes of the plurality of second beams.
  • the beam information can be appropriately adjusted.
  • the first beam b1 having the highest beam power and the plurality of second beams b4, b8, b12 have been determined, and it is assumed that the beam power level of the first beam b1 is 1, and the second beam b4 is relative to the first
  • the beam power level of one beam b1 is 1/2
  • the beam power level of beam b8 with respect to the first beam b1 is 1/4
  • the beam power level of beam b12 with respect to the first beam b1 is 1/8.
  • the beam power levels are predefined and the defined beam power levels are stored in association with the base station and the user equipment.
  • FIG. 8 shows an example of the number of bits required to determine the beam information of each beam in the second beam.
  • the broadband beam amplitude information of the plurality of second beams may be allocated the same number of bits.
  • the broadband beam amplitude information of the second beams b4, b8, and b12 are allocated. 3 bits to indicate that the beam power of the beam is one of the predefined eight levels.
  • different number of bits can be allocated to the sub-band beam information of the plurality of second beams.
  • the sub-band beam amplitude information of the plurality of second beams is assigned a different number of bits.
  • b4 is determined as the dominant beam in the second beam by the method of beam as described above, and correspondingly, b8, b12 are weak beams in the second beam, in which case, as shown in FIG. It can be shown that only 1 bit of the subband amplitude information of the dominant beam b4 in the second beam can be allocated to adjust its wideband amplitude information without assigning bits to the subband amplitude information of the beams b8, b12.
  • the broadband beam amplitude information of the plurality of second beams may be assigned different numbers of bits.
  • b4 is the dominant beam in the second beam
  • b8, b12 are the weak beams in the second beam.
  • 3 bits are allocated to the dominant beam b4, and the beam power of the beam b8 may only be less than or equal to the beam power of the dominant beam b4.
  • the beam power level of the beam b8 has a small value range, so Beam b8 requires fewer bits than beam b4 to indicate the available beam power level.
  • beam b12 has a smaller range of beam power levels, so fewer bits are needed for beam b12 to indicate that it is available.
  • Beam power level As shown in FIG. 9A, in the case of determining 3 bits required for the broadband beam amplitude information of the beam b4, it is determined that 2 bits are required for the broadband beam amplitude information of the beam b8, and the broadband beam amplitude information of the beam b12 is determined. Two or one bits are required. In this way, the overhead of signaling can be saved and the wideband amplitude information of the beam can be effectively fed back.
  • the beam power level may be represented by a form of a ratio to a previous stronger beam power level.
  • FIG. 9B shows another example of determining the number of bits required for beam information of each beam in the second beam.
  • b4 is the dominant beam in the second beam
  • b8, b12 are the weak beams in the second beam.
  • the range of the beam power levels of b4, b8, and b12 is decremented, as shown in FIG.
  • the dominant beam b4 can be allocated 3 bits to indicate the ratio of the beam b4 to the first beam b1, which requires less
  • the beam b8 of the number of bits is allocated 2 bits to indicate the ratio of the beam b8 to the dominant beam b4, and 2 or 1 bits are allocated to the beam b12 requiring a smaller number of bits to indicate the ratio of the beam b12 to the dominant beam b8.
  • FIG. 10 shows a configuration diagram of a user device 1000 according to an embodiment of the present invention.
  • the user equipment 1000 includes: a determining unit 1010 configured to determine a first beam and a plurality of second beams according to a beam selection result; and a transmitting unit 1020 configured to be configured according to the beams of the plurality of second beams Power, transmitting a beam index of the plurality of second beams to a base station.
  • the user device 1000 may include other components in addition to the above-described units, however, since these components are not related to the content of the embodiment of the present invention, the illustration and description thereof are omitted herein. Further, since the specific details of the following operations performed by the user apparatus 1000 according to the embodiment of the present invention are the same as those of the beam feedback method described above, the repeated description of the same details is omitted here to avoid repetition.
  • the base station may transmit a reference signal about the multiple beams to the user equipment, and the determining unit 1010 may determine, according to the channel measurement result, the first beam and the available beam for the user equipment from the beam transmitted by the base station. Multiple second beams.
  • the first beam may have the highest beam power among the selected beams, and the second beam may be a beam other than the first beam among the beams selected by the user equipment.
  • the sending unit 1020 may determine a sending order of the multiple second beams according to beam power, and send a beam index of the multiple second beams to a base station according to the determined sending order. Accordingly, the base station can obtain information about the beam power of the beam it indicates in accordance with the transmission order of the beam index.
  • the first beam b1 having the highest beam power, and the plurality of second beams b4, b8, b12 have been determined, and further assume that the beam power level of the first beam b1 is 1.
  • the beam power level of the second beam b4 relative to the first beam b1 is 1/2
  • the beam power level of the beam b8 relative to the first beam b1 is 1/8
  • the rating is 1/4.
  • the sending unit 1020 arranges the beam indexes of the plurality of second beams in descending order of beam power size, and then PMI-2, PMI-3, and PMI-4 are beams b4, b12, and b8, respectively.
  • the beam is indexed and the beam indices PMI-2, PMI-3, PMI-4 of the arranged second beams b4, b12, b8 are transmitted to the base station.
  • the beam indexes of the plurality of second beams arranged above may also be arranged in other orders, for example, in ascending order of beam power levels, and the ascending order beam index may be transmitted to the base station.
  • the user equipment 1000 may further include a grouping unit 1030 configured to divide the plurality of second beams into a first beam group and a second beam group according to beam power, where the first beam group The beam power of the beam in the second beam group is higher than the beam power of the beam in the second beam group; and the transmitting unit 1020 transmits a beam index arranged according to the first beam group and the second beam group to the base station.
  • the first beam group and the second beam group may include beams in one or more beam selection results, and in the case where the number of selected beams is large, the number of grouped beam groups is also It may not be limited to two.
  • the beam index may not need to be ordered according to beam power within the first beam set and the second beam set.
  • the grouping unit 1030 may also arrange the beam indexes of the plurality of beams included in the first beam group or the second beam group, for example, according to the wave power, as described above, and the transmitting unit 1020 transmits the signal to the base station. Arranged beam index. Accordingly, the base station can obtain information about the beam power of the beam it indicates based on the number of beams included in the first beam group and/or the second beam group and the transmission order of the beam index.
  • the transmitting unit 1020 transmits the broadband beam information corresponding to the beam indexes of the plurality of second beams; and transmits the subband beam information corresponding to the beam indexes of the plurality of second beams.
  • the known channel state indication (CSI) feedback type I may send first channel state information to the base station, and the first channel state information may include a channel state feedback type indication (CTI), a rank (RI), a precoding matrix indicator ( PMI) and channel quality indication (CQI), and beam information, etc.; and channel state indication (CSI) feedback type II may send second channel state information to the base station, the second channel state information may include beam quantity information (eg, It is the dominant beam number information as described above), PMI, and beam information.
  • CTI channel state feedback type indication
  • RI rank
  • PMI precoding matrix indicator
  • CQI channel quality indication
  • the beam information may include broadband beam information and subband beam information
  • the broadband beam information may include broadband amplitude information
  • the subband beam information may include subband amplitude information and subband phase information.
  • the PMI can include a beam index.
  • the transmitting unit 1020 may transmit the broadband beam information and the subband corresponding to the beam indexes of the plurality of second beams by using a channel state indication (CSI) feedback type I and/or a channel state indication (CSI) feedback type II. Beam information. It should be understood that the above-mentioned broadband beam information and sub-band beam information may be transmitted by the transmitting unit 1020 periodically or non-periodically to the base station.
  • CSI channel state indication
  • CSI channel state indication
  • the transmitting unit 1020 may transmit an example of the beam information by using a channel state indication (CSI) feedback type I and a channel state indication (CSI) feedback type II together, that is, transmitting the beam in a differential manner. information.
  • the sending unit 1020 may feed back the wideband amplitude information of the first beam by using a channel state indication (CSI) feedback type I, and feed back the subband amplitude information of the second beam by using a channel state indication (CSI) feedback type II, Subband phase information and subband quadrature phase information.
  • CSI channel state indication
  • CSI channel state indication
  • the transmitting unit 1020 may transmit a beam index of the first beam, and subband band beam information, and a beam of the plurality of second beams, using only channel state indication (CSI) feedback type II. Index, wideband beam information, and subband band information. Specifically, the transmitting unit 1020 feeds back the base station with wideband amplitude information, subband amplitude information, subband phase information, and subband quadrature phase information of the beam to be fed back using the channel state indication (CSI) feedback type II.
  • CSI channel state indication
  • different bits may be allocated to the broadband beam information and the subband beam information of the second beam.
  • the signaling overhead for feeding back the beam information is different, in this way, the signaling overhead can be effectively saved.
  • the transmitting unit 1020 sends a new feedback type, the dominant beam quantity information K, in addition to transmitting the broadband beam information and the sub-band beam information corresponding to the beam indexes of the plurality of second beams.
  • the dominant beam quantity information K indicates the number of dominant beams in the plurality of second beams.
  • the dominant beam quantity information K is also directly fed back to the base station by the beam information to be fed back, so that the base station can know that in addition to the first beam, there are K strong beams in the second beam to be fed back, correspondingly The remaining second beam is considered to be fed back as a weak beam.
  • the base station in combination with the dominant beam number information K, the base station can know which specific beams are dominant beams (ie, strong beams), those The beam is a weak beam.
  • the user equipment 1000 further includes a threshold setting unit 1040 configured to determine a beam power threshold in advance without determining a transmission order of the plurality of second beams, and Comparing the beam power threshold with the power of the plurality of second beams to determine a dominant beam in the plurality of second beams, wherein a beam power of the dominant beam is greater than a beam power of other beams in the second beam group high.
  • the plurality of second beams can be divided into a first beam group and a second beam group.
  • the beam power threshold is set to 1/2 in advance, and the plurality of second beams are compared with the set power threshold. If the second beam is greater than or equal to the power threshold, the second beam is a dominant beam.
  • the second beam is a weak beam.
  • the power level of the selected first beam b1 is 1, the beam power level of the second beam b4 relative to the first beam b1 is 1/2, and the beam b8 is relative to the first beam.
  • the beam power level of b1 is 1/8, and the beam power level of beam b12 relative to the first beam b1 is 1/4, then beam b4 is the dominant beam in the second beam, and b8, b12 is weak in the second beam. Beam.
  • step S102 the beam index arranged according to the first beam group and the second beam group is sent to the base station, and corresponding to the beam indexes of the plurality of second beams are respectively sent in steps S103 and S104.
  • Wideband beam information and subband beam information are sent to the base station, and corresponding to the beam indexes of the plurality of second beams.
  • the beam information can be appropriately adjusted.
  • the user equipment 1000 further includes a bit allocation unit 1050 configured to allocate the same number of bits to the broadband beam amplitude information of the plurality of second beams, for example, the bandwidth of the second beams b4, b8, b12
  • the beam amplitude information is allocated 3 bits to indicate that the beam power of the beam is one of the predefined eight levels.
  • different number of bits can be allocated to the sub-band beam information of the plurality of second beams. For example, the sub-band beam amplitude information of the plurality of second beams is assigned a different number of bits.
  • b4 is determined as the dominant beam in the second beam by the method of the bundle as described above, and correspondingly, b8 and b12 are weak beams in the second beam, in which case, only The subband amplitude information of the dominant beam b4 in the two beams is allocated 1 bit to adjust its wideband amplitude information without assigning bits to the subband amplitude information of the beams b8, b12.
  • the bit allocation unit 1050 may also allocate different number of bits to the broadband beam amplitude information of the plurality of second beams.
  • b4 is the dominant beam in the second beam
  • b8, b12 are the weak beams in the second beam.
  • 3 bits are allocated to the dominant beam b4, and the beam power of the beam b8 may only be less than or equal to the beam power of the dominant beam b4.
  • the beam power level of the beam b8 has a small value range, so Beam b8 requires fewer bits than beam b4 to indicate the available beam power level.
  • beam b12 has a smaller range of beam power levels, so fewer bits are needed for beam b12 to indicate that it is available.
  • Beam power level For example, in the case where it is determined that 3 bits are required for the broadband beam amplitude information of the beam b4, 2 bits are required for determining the broadband beam amplitude information of the beam b8, and 2 pieces of the broadband beam amplitude information for determining the beam b12 are required. Or 1 bit. In this way, the overhead of signaling can be saved and the wideband amplitude information of the beam can be effectively fed back.
  • the beam power level may be represented by a form of a ratio to a previous stronger beam power level.
  • b4 is the dominant beam in the second beam
  • b8, b12 are the weak beams in the second beam.
  • the range of values of the beam power levels of b4, b8, b12 is decremented, as shown in FIG.
  • the bit allocation unit 1050 can allocate 3 bits to the dominant beam b4 to indicate the ratio of the beam b4 to the first beam b1, Two bits are allocated to the beam b8 requiring a smaller number of bits to indicate the ratio of the beam b8 to the dominant beam b4, and two or one bits are allocated to the beam b12 requiring a smaller number of bits to indicate the beam b12 and the dominant beam b8 The ratio.
  • FIG. 11 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 user terminal 900 described above may be configured as a computer device that physically includes a processor 1110, a memory 1120, a memory 1130, a communication device 1140, an input device 1150, an output device 1160, a bus 1170, and the like.
  • the hardware structure of the user device 1000 may include one or more of the devices shown in the figure, or may not include some devices.
  • the processor 1110 only illustrates one, but may be multiple processors.
  • the processing may be performed by one processor, or may be performed by one or more processors simultaneously, sequentially, or by other methods.
  • the processor 1110 can be installed by more than one chip.
  • Each function in the user device 1000 is realized, for example, by reading predetermined software (program) into hardware such as the processor 1110 and the memory 1120, thereby causing the processor 1110 to perform calculation and communication with the communication device 1140. Control is performed and control of reading and/or writing of data in the memory 1120 and the memory 1130 is performed.
  • predetermined software program
  • control is performed and control of reading and/or writing of data in the memory 1120 and the memory 1130 is performed.
  • the processor 1110 causes the operating system to operate to control the entire computer.
  • the processor 1110 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 above-described determining unit 1010, grouping unit 1030, threshold setting unit 1040, bit allocating unit 1050, and the like may be implemented by the processor 1110.
  • the processor 1110 reads out programs (program codes), software modules, data, and the like from the memory 1130 and/or the communication device 1140 to the memory 1120, 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 1120 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 1120 may also be referred to as a register, a cache, a main memory (main storage device), or the like.
  • the memory 1120 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 1130 is a computer readable recording medium, and may be, for example, a flexible disk, a soft (registered trademark) disk (floppy disk), a magneto-optical disk (for example, a CD-ROM (Compact Disc ROM), etc.). Digital Versatile Disc, Blu-ray (registered trademark) disc, removable disk, hard drive, smart card, flash device (eg card, stick, key driver), magnetic stripe, database At least one of a server, a server, and other suitable storage medium. Memory 1130 may also be referred to as an auxiliary storage device.
  • the communication device 1140 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 1140 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 above-described transmitting unit 1020 or the like can be implemented by the communication device 1140.
  • the input device 1150 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 1160 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 1150 and the output device 1160 may also be an integrated structure (for example, a touch panel).
  • each device such as the processor 1110, the memory 1120, and the like are connected by a bus 1170 for communicating information.
  • the bus 1170 may be composed of a single bus or a different bus between devices.
  • the user device 1000 may include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable device.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA Field Programmable Gate Array
  • the processor 1110 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 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 Medium 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 whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, should be interpreted broadly to mean commands, command sets, code, code segments, program code, programs, sub- Programs, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, steps, functions, and the like.
  • 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.
  • radio base station (BS, Base Station)
  • radio base station radio base station
  • eNB radio base station
  • gNB gNodeB
  • cell a cell
  • cell group a carrier
  • component carrier a fixed station
  • NodeB a NodeB
  • eNodeB eNodeB
  • access point a transmission point
  • reception point a reception point
  • femto cell a small cell
  • a wireless base station can accommodate one or more (eg, three) cells (also referred to as sectors). When a wireless base station accommodates multiple cells, the entire coverage area of the wireless base station can be divided into multiple smaller areas, and each smaller area can also pass through a wireless base station subsystem (for example, a small indoor wireless base station (radio-radio) Head (RRH, Remote Radio Head))) to provide communication services.
  • a wireless base station subsystem for example, a small indoor wireless base station (radio-radio) Head (RRH, Remote Radio Head)
  • RRH small indoor wireless base station
  • the term "cell” or “sector” refers to a part or the whole of the coverage area of a radio base station and/or a radio base station subsystem that performs communication services in the coverage.
  • the radio 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.
  • 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 700 can be regarded as a function of the user terminal 800.
  • 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 800 described above can be regarded as a function of the wireless base station 700.
  • a specific operation performed by the radio base station may be performed by an upper node depending on the situation.
  • various actions performed for communication with the terminal may pass through the wireless base station and one other than the wireless base station.
  • the above network node may be considered, for example, a Mobility Management Entity (MME), a Serving-Gateway (S-GW, etc.), but not limited thereto), 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 “judgement (determination)”. 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

本发明提供了一种由用户装置执行的波束信息反馈方法，包括：根据波束选择结果，确定第一波束和多个第二波束；根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引；与所述多个第二波束的波束索引对应地发送宽带波束信息；以及与所述多个第二波束的波束索引对应地发送子带波束信息。

Description

波束信息反馈方法及用户装置 技术领域
本申请涉及无线通信领域，并且具体涉及由用户装置执行的波束反馈方法，以及相应的用户装置。
背景技术
为了提高通信系统的吞吐量，已经提出了全维度多输入多输出(Full Dimensional MIMO,FD-MIMO)和大规模多输入多输出(Massive MIMO)天线。与传统的MIMO系统相比，在FD-MIMO和Massive MIMO系统中，基站能够使用更多波束与用户装置进行数据传输。
为了对多波束的波束信息进行反馈，提出了将多个波束中波束除了功率最强的波束以外的剩余波束分为两组，向基站发送所述剩余波束的分组信息，并根据分组信息分别对两组波束的进行相应的波束信息反馈。然而，这种波束反馈方法需要发送用于指示波束分组的分组信息，以指示相应的波束反馈信息。
发明内容
根据本发明的一个方面，提供了一种由用户装置执行的波束信息反馈方法，包括：根据波束选择结果，确定第一波束和多个第二波束；根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引；与所述多个第二波束的波束索引对应地发送宽带波束信息；以及与所述多个第二波束的波束索引对应地发送子带波束信息。
根据本发明的另一方面，提供了一种用户装置，包括：确定单元，配置为根据波束选择结果，确定第一波束和多个第二波束；发送单元，配置为根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引；与所述多个第二波束的波束索引对应地发送宽带波束信息，以及与所述多个第二波束的波束索引对应地发送子带波束信息。
在本发明上述方面的由用户装置执行的波束信息反馈方法以及相应的用户装置中，通过根据所述多个第二波束的波束功率，向基站发送所述多个 第二波束的波束索引，并且与多个第二波束的波束索引对应地发送宽带波束信息和子带(Sub-band)波束信息，即使不向基站发送分组信息，基站也能根据从用户装置接收到的波束索引，获得所需要的关于波束功率的信息，并确定与特定波束对应的波束信息，从而节省了信令开销。
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
附图用于提供对本发明的进一步理解，并且构成说明书的一部分，与本发明的实施例一起用于解释本发明，并不构成对发明的限制，其中在附图中：
图1为示出根据本发明实施例的由用户装置执行的波束信息反馈方法的流程图；
图2为示出根据本发明实施例的从波束选择结果中确定第一波束和多个第二波束的示意图；
图3A为示出根据本发明实施例的根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引的示例的流程图；
图3B为示出根据本发明实施例的根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引的示例的示意图；
图4A为示出根据本发明实施例的根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引的另一示例的流程图；
图4B为示出根据本发明实施例的根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引的另一示例的示意图；
图5为示出根据本发明实施例的通过使用信道状态指示(CSI)反馈类型I和信道状态指示(CSI)反馈类型II共同来反馈波束信息的示意图；
图6为示出根据本发明实施例的仅通过信道状态指示(CSI)反馈类型II来反馈波束信息的示意图；
图7为示出根据本发明实施例的通过发送所述多个第二波束中优势波束的数量来向基站反馈波束信息的示意图；
图8为示出根据本发明实施例的确定第二波束中各个波束的波束信息 所需要的比特数的示例的示意图；
图9A为示出根据本发明实施例的确定第二波束中各个波束的波束信息所需要的比特数的另一示例的示意图；
图9B为示出根据本发明实施例的确定第二波束中各个波束的波束信息所需要的比特数的再一示例的示意图；
图10为示出根据本发明实施例的用户装置的配置图；以及
图11为示出根据本发明实施例的用户装置的硬件结构的配置图。
具体实施方式
下面将参照附图来描述根据本发明实施例的由用户装置执行的波束反馈方法，以及相应的用户装置。在附图中，相同的参考标号自始至终表示相同的元件。显然，所描述的实施例仅仅是本发明的一部分实施例，而不是本发明的全部实施例。应当理解：这里描述的实施例仅仅是说明性的，而不应被解释为限制本发明的范围，基于本发明中描述的实施例，本领域技术人员在没有付出创造性劳动的情况下所得到的所有其它实施例都应落入本发明的保护范围之内。
在根据本发明的实施例中，在进行波束信息反馈时，可以针对波束在宽带中的特征进行反馈，也可针对波束在子带中的特征进行反馈，其中，一个宽带可包括多个子带。在针对波束在宽带中的特征进行反馈时用户装置所发送的波束信息中所包含参数可与在针对波束在子带中的特征进行反馈时用户装置所发送的波束信息中所包含的参数至少部分不同。此外，在根据本发明的实施例中，功率不同的波束的反馈信息中包含的参数可以不同。
首先，参照图1描述根据本发明实施例的由用户装置执行的波束信息反馈方法。
图1示出由用户装置执行的波束信息反馈方法的流程图。如图1所示，在步骤S101中，根据波束选择结果，确定第一波束和多个第二波束。根据本发明的一个实施例，基站可以向用户装置发送关于多个波束的参考信号，并且用户装置可根据信道测量结果，从基站发送的波束中选择可用于该用户装置的所述第一波束和多个第二波束。根据本发明的另一实施例，第一波束可具有所选择的波束之中最高的波束功率，并且第二波束可以是用户装置所 选择的波束中除了第一波束以外的波束。
图2示出在步骤S101中从波束选择结果中确定第一波束和多个第二波束的一个示例。如图2所示，基站向用户装置发送的关于多个波束的参考信号，用户装置首先通过适当的波束选择方法(例如根据信道测量结果)从多个波束b1-b12之中选择出波束b1、b4、b8、b12，假设第一波束b1的波束功率等级(beam power level)为1，第二波束b4相对于第一波束b1的波束功率等级为1/2，波束b8相对于第一波束b1的波束功率等级为1/8，以及波束b12相对于第一波束b1的波束功率等级为1/4，则将波束b1确定为第一波束，将波束b4、b8、b12确定为第二波束。应理解，所述波束功率等级是预先定义的，并将所定义的波束功率等级相关联地存储于基站和用户装置中。
在步骤S102中，根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引。根据本发明的一个实施例，波束索引可被包含于预编码矩阵指示(PMI)中。
接下来，结合图3A-3B描述根据本发明实施例的根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引的示例。图3A示出该示例的流程图，如图3A所示，在步骤S102中可包含两个子步骤。具体地，在步骤S1021a中，根据波束功率确定所述多个第二波束的发送顺序。在步骤S1022a中，按照所确定的发送顺序向基站发送所述多个第二波束的波束索引。相应地，基站可根据波束索引的发送顺序获得关于其所指示的波束的波束功率的信息。例如，如前所述，假设第二波束b4、b8、b12的波束功率等级分别为1/2、1/4、1/8，则在步骤S1021a中按波束b4、b8、b12的顺序排列，并在步骤S1022a中发送所述波束的波束索引。图3B示出该示例的示意图，如图3B所示，按波束功率的降序将波束排列为b4、b8、b12的顺序，并且PMI-2、PMI-3、PMI-4分别为波束b4、b12、b8的波束索引，并向基站发送所排列的第二波束b4、b12、b8的波束索引PMI-2、PMI-3、PMI-4。应理解，上述排列的多个第二波束的波束索引也可以是按照其他顺序排列的，例如按照波束功率等级的升序排列，并且可以向基站发送所述升序排列的波束索引。
接下来，结合图4A-4B描述根据本发明实施例的根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引的另一示例。图4A 示出该示例的流程图，如图4A所示，在步骤S102中可包含两个子步骤。具体地，在步骤S1021b，可根据波束功率，将多个第二波束分为第一波束组和第二波束组，其中第一波束组中的波束的波束功率比第二波束组中的波束的波束功率高。应理解，所述第一波束组以及第二波束组均可以包含一个或多个波束选择结果中的波束，并且在所选择的波束的数量较多的情况下，所分组的波束组的数量也可以不仅限于两个。在步骤S1022b，向基站发送根据第一波束组和第二波束组排列的波束索引。在一般情况下，在第一波束组和第二波束组内部可不需要根据波束功率对波束索引进行排序。可替代地，也可以对第一波束组或第二波束组中包含的多个波束的波束索引进行排列，例如，如上所述根据波数功率进行排列，并向基站发送所排列的波束索引。相应地，基站可根据第一波束组和/或第二波束组中包含的波束的数量以及波束索引的发送顺序获得关于其所指示的波束的波束功率的信息。例如，如前所述，假设第二波束b4、b8、b12的波束功率等级分别为1/2、1/4、1/8。则在步骤S1021b中，可以将第二波束b4分为第一波束组，以及将第二波束b8、b12分为第二波束组，并在S1022b中向基站发送根据第一波束组和第二波束组排列的波束索引。图4B示出该示例的示意图，如图4B所示，将第二波束b4分为第一波束组，以及将第二波束b8、b12分为第二波束组，PMI-2为第一波束组中波束b4的波束索引，以及PMI-3、PMI-4为第二波束组中波束b8、b12的波束索引，其中第二波束组中的波束b8、b12可以不进行排序。并按第一波束组、第二波束组排列的顺序，向基站发送对应的波束索引PMI-2、PMI-3、PMI-4。如上所述，可替代地，在步骤S1021a中，也可以将b4、b12分为第一波束组，以及将第二波束b8分为第二波束组，则PMI-2、PMI-3为第一波束组中波束b4、b12的波束索引，以及PMI-4为第二波束组中波束b8的波束索引。并在在步骤S1022a中向基站发送根据第一波束组和第二波束组排列的波束索引。
在步骤S103中，与所述多个第二波束的波束索引对应地发送宽带波束信息。以及，在步骤S104中，与所述多个第二波束的波束索引对应地发送子带波束信息。已知信道状态指示(CSI)反馈类型I可以向基站发送第一信道状态信息，所述第一信道状态信息可以包括信道状态反馈类型指示(CTI)、秩(RI)、预编码矩阵指示符(PMI)以及信道质量指示(CQI)，以及波束 信息等；并且信道状态指示(CSI)反馈类型II可以向基站发送第二信道状态信息，所述第二信道状态信息可以包括波束数量信息(例如可以是如上所述的优势波束数量信息)、PMI，以及波束信息等。根据本发明的一个实施例，所述波束信息可以包含宽带波束信息和子带波束信息，所述宽带波束信息可以包含宽带幅度信息，所述子带波束信息可以包含子带幅度信息、子带相位信息以及子带正交相位(co-phase)信息。所述PMI可以包含波束索引。
由此可见，所述第一信道状态信息以及所述第二信道状态信息均可包含波束信息和PMI。因此，用户装置可以通过使用信道状态指示(CSI)反馈类型I和/或信道状态指示(CSI)反馈类型II来与所述多个第二波束的波束索引对应地发送宽带波束信息以及子带波束信息。应理解，上述宽带波束信息以及子带波束信息可以是周期性地，也可以是非周期性地向基站发送。
接下来，将结合图5描述本发明发送波束信息的示例。图5示出了通过使用信道状态指示(CSI)反馈类型I和信道状态指示(CSI)反馈类型II共同来反馈波束信息的示例，即以差分方式来发送所述波束信息。根据本发明的一个实施例，如图5所示，用户装置使用信道状态指示(CSI)反馈类型I反馈所述第一波束的波束索引和子带波束信息，以及使用信道状态指示(CSI)反馈类型II反馈所述第二波束的波束索引、宽带波束信息和子带波束信息。
接下来，将结合图6描述本发明发送波束信息反馈的另一示例。图6示出了仅通过信道状态指示(CSI)反馈类型II来反馈波束信息的示例。根据本发明的另一实施例，用户装置仅使用信道状态指示(CSI)反馈类型II发送所述第一波束的波束索引、和子带带波束信息，以及所述多个第二波束的波束索引、宽带波束信息和子带带波束信息。具体地，如图6所示，用户装置将所有要进行反馈的波束的宽带幅度信息、子带幅度信息、子带相位信息以及子带正交相位信息使用信道状态指示(CSI)反馈类型II来向基站进行反馈。
根据本发明的一个实施例，对于多个第二波束中具有不同波束功率的波束，可以对所述第二波束的宽带波束信息以及子带波束信息分配不同的比特(bit)。换言之，对于具有较强波束功率的优势波束和具有较弱波束功率的弱波束来说，其用于反馈所述波束信息的信令开销是不同的，以这种方式，能够有效节省信令开销。为此，需要确定第二波束中的优势波束的数量以适当地分配所需要的比特数。
接下来，将结合图7描述本发明确定多个第二波束中优势波束的方法的示例。图7示出了通过发送所述多个第二波束中优势波束的数量来向基站反馈波束信息的示例，其中优势波束的波束功率比第二波束组中的其他波束的波束功率高。
根据本发明的一个实施例，如图7所示，在步骤S103、S104中，除发送与多个第二波束的波束索引对应地发送宽带波束信息以及子带波束信息以外，还发送一种新的反馈类型为优势波束数量信息K，所述优势波束数量信息K指示所述多个第二波束中优势波束的数量。换言之，通过随要反馈的波束信息一起直接将优势波束数量信息K也反馈至基站，使得基站能够知道除第一波束以外，在所述第二波束中存在K个强波束将要被反馈，相应地，其余的第二波束则被认为是作为弱波束反馈的。以这种方式，在如前所述的已确定所述多个第二波束的发送顺序的情况下，结合优势波束数量信息K，基站能够知道具体哪些波束为优势波束(即强波束)，那些波束为弱波束。例如，在图7所示的示例中，所述第二波束的发送顺序如图3B所示，并且要发送的优势波束数量信息K为1，即向基站反馈所述多个第二波束中优势波束的数量为1个，则波束b4为第二波束中的优势波束，相应地，b8、b12为第二波束中的弱波束。
根据本发明的一个实施例，在未确定所述多个第二波束的发送顺序的情况下，可以预先确定波束功率阈值，并将所述波束功率阈值与所述多个第二波束的功率比较，以确定在所述多个第二波束中的优势波束，其中优势波束的波束功率比第二波束组中的其他波束的波束功率高。以这种方式，可以将所述多个第二波束分为第一波束组和第二波束组。例如，预先设置波束功率阈值为1/2，将多个第二波束与所设置的功率阈值进行比较，如果所述第二波束大于或等于所述功率阈值，则所述第二波束为优势波束，即强波束。相反地，如果所述第二波束小于所述功率阈值，则所述第二波束为弱波束。在该示例中，假设如前所述，所选择的第一波束b1的功率等级为1，第二波束b4相对于第一波束b1的波束功率等级为1/2，波束b8相对于第一波束b1的波束功率等级为1/8，以及波束b12相对于第一波束b1的波束功率等级为1/4，则波束b4为第二波束中的优势波束，b8、b12位第二波束中的弱波束。随后，在步骤S102中向基站发送根据所述第一波束组和所述第二波束组排 列的波束索引，并在步骤S103、S104中分别发送与所述多个第二波束的波束索引对应的宽带波束信息以及子带波束信息。
根据本发明的一个实施例，在确定了优势波束和弱波束各自的数量后，还需要确定对于所述各个优势波束和弱波束的宽带波束信息以及子带波束信息所需要的比特(bit)数，从而可以对波束信息进行适当的调节。
如前所述，已确定了具有最高波束功率的第一波束b1，以及多个第二波束b4、b8、b12，并假设第一波束b1的波束功率等级为1，第二波束b4相对于第一波束b1的波束功率等级为1/2，波束b8相对于第一波束b1的波束功率等级为1/4，以及波束b12相对于第一波束b1的波束功率等级为1/8。应理解，所述波束功率等级是预先定义的，并将所定义的波束功率等级相关联地存储于基站和用户装置中。
图8示出确定第二波束中各个波束的波束信息所需要的比特数的示例。根据本发明的一个实施例，可以对多个第二波束的宽带波束幅度信息分配相同的比特数，例如，如图8所示，对第二波束b4、b8、b12的宽带波束幅度信息均分配3个比特来指示所述波束的波束功率为预先定义的8个等级中的其中之一。此外，可以对多个第二波束的子带波束信息分配不同的比特数。例如，对多个第二波束的子带波束幅度信息分配不同的比特数。具体地，如上所述，通过如上所述束的方法确定b4为第二波束中的优势波束，相应地，b8、b12为第二波束中的弱波束，在这种情况下，如图8所示，可以仅对第二波束中的优势波束b4的子带幅度信息分配1个比特以对其宽带幅度信息进行调整，而不对波束b8、b12的子带幅度信息分配比特。
图9A-9B示出确定第二波束中各个波束的波束信息所需要的比特数的另一示例。根据本发明的另一实施例，可以对多个第二波束的宽带波束幅度信息分配不同的比特数。如前所述，已确定b4为第二波束中的优势波束，相应地，b8、b12为第二波束中的弱波束。在这种情况下，例如，对优势波束b4分配3个比特，而波束b8的波束功率仅可能小于或等于优势波束b4的波束功率，显然波束b8的波束功率等级的取值范围较小，因此波束b8相比于波束b4需要较少的比特数来指示可用的波束功率等级，类似地，波束b12的波束功率等级的取值范围更小，因此对波束b12需要更少的比特数来指示可用的波束功率等级。具体地，如图9A所示，在确定波束b4的宽带波 束幅度信息所需要3个比特的情况下，则确定波束b8的宽带波束幅度信息所需要2个比特，确定波束b12的宽带波束幅度信息所需要2个或1个比特。以这种方式，能够节省信令的开销，并有效地反馈所述波束的宽带幅度信息。
可替代地，根据本发明的另一实施例，所述波束功率等级可以通过与前一个较强波束功率等级的比值的形式来表示。图9B示出确定第二波束中各个波束的波束信息所需要的比特数的另一示例。如前所述，已确定b4为第二波束中的优势波束，相应地，b8、b12为第二波束中的弱波束。类似地，由于b4、b8、b12的波束功率等级的取值范围递减，如图9B所示，可对优势波束b4分配3个比特以指示波束b4与第一波束b1的比值，对需要较少的比特数的波束b8分配2个比特以指示波束b8与优势波束b4的比值，对需要更少的比特数的波束b12分配2个或1个比特以指示波束b12与优势波束b8的比值。
下面，参照图10来描述根据本发明实施例的用户装置。图10示出了根据本发明实施例的用户装置1000的配置图。如图10所示，用户装置1000包括：确定单元1010，配置为根据波束选择结果，确定第一波束和多个第二波束；以及发送单元1020，配置为根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引。应理解，除了上述单元以外，用户装置1000还可以包括其他部件，然而，由于这些部件与本发明实施例的内容无关，因此在这里省略其图示和描述。此外，由于根据本发明实施例的用户装置1000执行的下述操作的具体细节与在上文中描述波束反馈方法的细节相同，因此在这里为了避免重复而省略对相同细节的重复描述。
根据本发明的一个实施例，基站可以向用户装置发送关于多个波束的参考信号，确定单元1010可根据信道测量结果，从基站发送的波束中确定可用于该用户装置的所述第一波束和多个第二波束。根据本发明的另一实施例，第一波束可具有所选择的波束之中最高的波束功率，并且第二波束可以是用户装置所选择的波束中除了第一波束以外的波束。
根据本发明的另一实施例，所述发送单元1020可根据波束功率确定所述多个第二波束的发送顺序，并按照所确定的发送顺序向基站发送所述多个第二波束的波束索引。相应地，基站可根据波束索引的发送顺序获得关于其所指示的波束的波束功率的信息。
具体地，如前所述，已确定了具有最高波束功率的第一波束b1，以及多个第二波束b4、b8、b12，并进一步假设第一波束b1的波束功率等级(beam power level)为1，第二波束b4相对于第一波束b1的波束功率等级为1/2，波束b8相对于第一波束b1的波束功率等级为1/8，以及波束b12相对于第一波束b1的波束功率等级为1/4。
根据本发明的一个实施例，发送单元1020以波束功率大小的降序排列所述多个第二波束的波束索引，则PMI-2、PMI-3、PMI-4分别为波束b4、b12、b8的波束索引，并向基站发送所排列的第二波束b4、b12、b8的波束索引PMI-2、PMI-3、PMI-4。应理解，上述排列的多个第二波束的波束索引也可以是按照其他顺序排列的，例如按照波束功率等级的升序排列，并且可以向基站发送所述升序排列的波束索引。
根据本发明的另一实施例，所述用户装置1000还可以包括分组单元1030，配置为根据波束功率，将多个第二波束分为第一波束组和第二波束组，其中第一波束组中的波束的波束功率比第二波束组中的波束的波束功率高；以及发送单元1020向基站发送根据第一波束组和第二波束组排列的波束索引。应理解，所述第一波束组以及第二波束组均可以包含一个或多个波束选择结果中的波束，并且在所选择的波束的数量较多的情况下，所分组的波束组的数量也可以不仅限于两个。在一般情况下，在第一波束组和第二波束组内部可不需要根据波束功率对波束索引进行排序。可替代地，分组单元1030也可以对第一波束组或第二波束组中包含的多个波束的波束索引进行排列，例如，如上所述根据波数功率进行排列，以及发送单元1020向基站发送所排列的波束索引。相应地，基站可根据第一波束组和/或第二波束组中包含的波束的数量以及波束索引的发送顺序获得关于其所指示的波束的波束功率的信息。
根据本发明的另一实施例，发送单元1020与所述多个第二波束的波束索引对应地发送宽带波束信息；以及与所述多个第二波束的波束索引对应地发送子带波束信息。已知信道状态指示(CSI)反馈类型I可以向基站发送第一信道状态信息，所述第一信道状态信息可以包括信道状态反馈类型指示(CTI)、秩(RI)、预编码矩阵指示符(PMI)以及信道质量指示(CQI)，以及波束信息等；并且信道状态指示(CSI)反馈类型II可以向基站发送第二 信道状态信息，所述第二信道状态信息可以包括波束数量信息(例如可以是如上所述的优势波束数量信息)、PMI，以及波束信息等。根据本发明的一个实施例，所述波束信息可以包含宽带波束信息和子带波束信息，所述宽带波束信息可以包含宽带幅度信息，所述子带波束信息可以包含子带幅度信息、子带相位信息以及子带正交相位(co-phase)信息。所述PMI可以包含波束索引。
由此可见，所述第一信道状态信息以及所述第二信道状态信息均可包含波束信息和PMI。因此，发送单元1020可以通过使用信道状态指示(CSI)反馈类型I和/或信道状态指示(CSI)反馈类型II来与所述多个第二波束的波束索引对应地发送宽带波束信息以及子带波束信息。应理解，上述宽带波束信息以及子带波束信息可以由发送单元1020周期性地，也可以是非周期性地向基站发送。
根据本发明的一个实施例，发送单元1020可以通过使用信道状态指示(CSI)反馈类型I和信道状态指示(CSI)反馈类型II共同来反馈波束信息的示例，即以差分方式来发送所述波束信息。例如，发送单元1020可以使用信道状态指示(CSI)反馈类型I反馈所述第一波束的宽带幅度信息，以及使用信道状态指示(CSI)反馈类型II反馈所述第二波束的子带幅度信息、子带相位信息以及子带正交相位信息。
根据本发明的另一实施例，发送单元1020可以仅使用信道状态指示(CSI)反馈类型II发送所述第一波束的波束索引、和子带带波束信息，以及所述多个第二波束的波束索引、宽带波束信息和子带带波束信息。具体地，发送单元1020将所有要进行反馈的波束的宽带幅度信息、子带幅度信息、子带相位信息以及子带正交相位信息使用信道状态指示(CSI)反馈类型II来向基站进行反馈。
根据本发明的一个实施例，对于多个第二波束中具有不同波束功率的波束，可以对所述第二波束的宽带波束信息以及子带波束信息分配不同的比特(bit)。换言之，对于具有较强波束功率的优势波束和具有较弱波束功率的弱波束来说，其用于反馈所述波束信息的信令开销是不同的，以这种方式，能够有效节省信令开销。为此，需要确定第二波束中的优势波束的数量以适当地分配所需要的比特数。
根据本发明的一个实施例，发送单元1020除发送与多个第二波束的波束索引对应地发送宽带波束信息以及子带波束信息以外，还发送一种新的反馈类型为优势波束数量信息K，所述优势波束数量信息K指示所述多个第二波束中优势波束的数量。换言之，通过随要反馈的波束信息一起直接将优势波束数量信息K也反馈至基站，使得基站能够知道除第一波束以外，在所述第二波束中存在K个强波束将要被反馈，相应地，其余的第二波束则被认为是作为弱波束反馈的。以这种方式，在如前所述的已确定所述多个第二波束的发送顺序的情况下，结合优势波束数量信息K，基站能够知道具体哪些波束为优势波束(即强波束)，那些波束为弱波束。
根据本发明的一个实施例，所述用户装置1000还包括阈值设定单元1040，其配置为在未确定所述多个第二波束的发送顺序的情况下，可以预先确定波束功率阈值，并将所述波束功率阈值与所述多个第二波束的功率比较，以确定在所述多个第二波束中的优势波束，其中优势波束的波束功率比第二波束组中的其他波束的波束功率高。以这种方式，可以将所述多个第二波束分为第一波束组和第二波束组。例如，预先设置波束功率阈值为1/2，将多个第二波束与所设置的功率阈值进行比较，如果所述第二波束大于或等于所述功率阈值，则所述第二波束为优势波束，即强波束。相反地，如果所述第二波束小于所述功率阈值，则所述第二波束为弱波束。在该示例中，假设如前所述，所选择的第一波束b1的功率等级为1，第二波束b4相对于第一波束b1的波束功率等级为1/2，波束b8相对于第一波束b1的波束功率等级为1/8，以及波束b12相对于第一波束b1的波束功率等级为1/4，则波束b4为第二波束中的优势波束，b8、b12位第二波束中的弱波束。随后，在步骤S102中向基站发送根据所述第一波束组和所述第二波束组排列的波束索引，并在步骤S103、S104中分别发送与所述多个第二波束的波束索引对应的宽带波束信息以及子带波束信息。
根据本发明的一个实施例，在确定了优势波束和弱波束各自的数量后，还需要确定对于所述各个优势波束和弱波束的宽带波束信息以及子带波束信息所需要的比特(bit)数，从而可以对波束信息进行适当的调节。
根据本发明的一个实施例，用户装置1000还包括比特分配单元1050，配置为对多个第二波束的宽带波束幅度信息分配相同的比特数，例如，对第 二波束b4、b8、b12的宽带波束幅度信息均分配3个比特来指示所述波束的波束功率为预先定义的8个等级中的其中之一。此外，可以对多个第二波束的子带波束信息分配不同的比特数。例如，对多个第二波束的子带波束幅度信息分配不同的比特数。具体地，如上所述，通过如上所述束的方法确定b4为第二波束中的优势波束，相应地，b8、b12为第二波束中的弱波束，在这种情况下，可以仅对第二波束中的优势波束b4的子带幅度信息分配1个比特以对其宽带幅度信息进行调整，而不对波束b8、b12的子带幅度信息分配比特。
根据本发明的另一实施例，比特分配单元1050还可以对多个第二波束的宽带波束幅度信息分配不同的比特数。如前所述，已确定b4为第二波束中的优势波束，相应地，b8、b12为第二波束中的弱波束。在这种情况下，例如，对优势波束b4分配3个比特，而波束b8的波束功率仅可能小于或等于优势波束b4的波束功率，显然波束b8的波束功率等级的取值范围较小，因此波束b8相比于波束b4需要较少的比特数来指示可用的波束功率等级，类似地，波束b12的波束功率等级的取值范围更小，因此对波束b12需要更少的比特数来指示可用的波束功率等级。具体地，例如，在确定波束b4的宽带波束幅度信息所需要3个比特的情况下，则确定波束b8的宽带波束幅度信息所需要2个比特，确定波束b12的宽带波束幅度信息所需要2个或1个比特。以这种方式，能够节省信令的开销，并有效地反馈所述波束的宽带幅度信息。
可替代地，根据本发明的另一实施例，所述波束功率等级可以通过与前一个较强波束功率等级的比值的形式来表示。如前所述，已确定b4为第二波束中的优势波束，相应地，b8、b12为第二波束中的弱波束。类似地，由于b4、b8、b12的波束功率等级的取值范围递减，如图9B所示，比特分配单元1050可对优势波束b4分配3个比特以指示波束b4与第一波束b1的比值，对需要较少的比特数的波束b8分配2个比特以指示波束b8与优势波束b4的比值，对需要更少的比特数的波束b12分配2个或1个比特以指示波束b12与优势波束b8的比值。
<硬件结构>
本发明的一实施方式中的用户装置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11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。上述的用户终端900可以作为在物理上包括处理器1110、内存1120、存储器1130、通信装置1140、输入装置1150、输出装置1160、总线1170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。用户装置1000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1110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1110可以通过一个以上的芯片来安装。
用户装置1000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1110、内存1120等硬件上，从而使处理器1110进行运算，对由通信装置1140进行的通信进行控制，并对内存1120和存储器1130中的数据的读出和/或写入进行控制。
处理器1110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1110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。例如，上述的确定单元1010、分组单元1030、阈值设定单元1040、比特分配单元1050等可以通过处理器1110实现。
此外，处理器1110将程序(程序代码)、软件模块、数据等从存储器1130和/或通信装置1140读出到内存1120，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1120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1120也可以称为寄存器、高速缓存、主存储器(主存储装置)等。内存1120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1130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1130也可以称为辅助存储装置。
通信装置1140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1140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。例如，上述的发送单元1020等可以通过通信装置1140来实现。
输入装置1150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1160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1150和输出装置1160也可以为一体的结构(例如触控面板)。
此外，处理器1110、内存1120等各装置通过用于对信息进行通信的总线1170连接。总线1170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，用户装置1000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1110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，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，“无线基站(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。无线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。
无线基站可以容纳一个或多个(例如三个)小区(也称为扇区)。当无线基站容纳多个小区时，无线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无线基站子系统(例如，室内用小型无线基 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无线基站和/或无线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。无线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700所具有的功能当作用户终端800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800所具有的功能当作无线基站700所具有的功能。
在本说明书中，设为通过无线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，在具有无线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无线基站、除无线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。

Claims (18)

  1. 一种由用户装置执行的波束信息反馈方法，包括：
    根据波束选择结果，确定第一波束和多个第二波束；
    根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引；
    与所述多个第二波束的波束索引对应地发送宽带波束信息；以及
    与所述多个第二波束的波束索引对应地发送子带波束信息。
  2. 如权利要求1所述的方法，其中根据所述多个第二波束的波束功率，向所述基站发送所述多个第二波束的波束索引包括：
    根据波束功率，确定所述多个第二波束的发送顺序；以及
    按照所确定的发送顺序向基站发送所述多个第二波束的波束索引。
  3. 如权利要求1所述的方法，其中根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引包括：
    根据波束功率，将所述多个第二波束分为第一波束组和第二波束组，其中第一波束组中的波束的波束功率比第二波束组中的波束的波束功率高；以及
    向基站发送根据所述第一波束组和所述第二波束组排列的波束索引。
  4. 如权利要求1-3中任意一项所述的方法，还包括：
    向基站发送所述多个第二波束中优势波束的数量，其中优势波束的波束功率比第二波束组中的其他波束的波束功率高。
  5. 如权利要求1-3中任意一项所述的方法，还包括：
    预先确定发送所述多个第二波束中优势波束的波束功率阈值，其中优势波束的波束功率比第二波束组中的其他波束的波束功率高。
  6. 如权利要求1-3中任意一项所述的方法，其中
    使用信道状态指示(CSI)反馈类型II发送所述多个第二波束的波束索引、宽带波束信息和子带带波束信息，
    所述方法还包括：
    使用信道状态指示反馈类型I发送所述第一波束的波束索引和子带带波束信息。
  7. 如权利要求1所述的方法，还包括：
    在向基站发送所述多个第二波束的波束索引时，发送所述第一波束的波束索引，其中根据所述第一波束和所述多个第二波束的波束功率确定所述第一波束的波束索引和所述多个第二波束的波束索引的发送顺序；以及
    在与所述多个第二波束的波束索引对应地发送子带波束信息时，与所述第一波束的波束索引对应地发送子带波束信息。
  8. 如权利要求7所述的方法，其中
    使用信道状态指示(CSI)反馈类型II发送所述第一波束的波束索引、和子带带波束信息，以及所述多个第二波束的波束索引、宽带波束信息和子带带波束信息。
  9. 如权利要求如权利要求1-3中任意一项所述的方法，其中
    所述宽带波束信息包括宽带波束幅度信息，
    所述方法还包括：
    根据所述多个第二波束的波束功率，确定发送所述多个第二波束中各个波束的宽带波束幅度信息所需要的比特数。
  10. 一种用户装置，包括：
    确定单元，配置为根据波束选择结果，确定第一波束和多个第二波束；
    发送单元，配置为根据所述多个第二波束的波束功率，向基站发送所述多个第二波束的波束索引；与所述多个第二波束的波束索引对应地发送宽带波束信息，以及与所述多个第二波束的波束索引对应地发送子带波束信息。
  11. 如权利要求10所述的用户装置，其中
    所述发送单元根据波束功率，确定所述多个第二波束的发送顺序，并按照所确定的发送顺序向基站发送所述多个第二波束的波束索引。
  12. 如权利要求10所述的用户装置，还包括：
    分组单元，配置为根据波束功率，将所述多个第二波束分为第一波束组和第二波束组，其中第一波束组中的波束的波束功率比第二波束组中的波束的波束功率高；以及
    其中所述发送单元向基站发送根据所述第一波束组和所述第二波束组排列的波束索引。
  13. 如权利要求10-12中任意一项所述的用户装置，其中
    所述发送单元还配置为向基站发送所述多个第二波束中优势波束的数量，其中优势波束的波束功率比第二波束组中的其他波束的波束功率高。
  14. 如权利要求10-12中任意一项所述的用户装置，还包括：
    阈值设定单元，配置为预先确定发送所述多个第二波束中优势波束的波束功率阈值，其中优势波束的波束功率比第二波束组中的其他波束的波束功率高。
  15. 如权利要求10-12中任意一项所述的用户装置，其中
    所述发送单元配置为使用信道状态指示(CSI)反馈类型II发送所述多个第二波束的波束索引、宽带波束信息和子带带波束信息，以及
    所述发送单元还配置为使用信道状态指示反馈类型I发送所述第一波束的波束索引和子带带波束信息。
  16. 如权利要求10所述的用户装置，其中
    所述发送单元在向基站发送所述多个第二波束的波束索引时，还发送所述第一波束的波束索引，其中根据所述第一波束和所述多个第二波束的波束功率排列所述第一波束的波束索引和所述多个第二波束的波束索引；以及
    所述发送单元在与所述多个第二波束的波束索引对应地发送子带波束信息时，还与所述第一波束的波束索引对应地发送子带波束信息。
  17. 如权利要求16所述的用户装置，其中
    所述发送单元使用信道状态指示(CSI)反馈类型II发送所述第一波束的波束索引、和子带带波束信息，以及所述多个第二波束的波束索引、宽带波束信息和子带带波束信息。
  18. 如权利要求如权利要求10-12中任意一项所述的用户装置，其中
    所述宽带波束信息包括宽带波束幅度信息，
    所述用户装置还包括：
    比特分配单元，配置为根据所述多个第二波束的波束功率，确定发送所述多个第二波束中各个波束的宽带波束幅度信息所需要的比特数。
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