WO2013091535A1 - Procédé et dispositif pour retourner par rétroaction des données d'état de canal - Google Patents

Procédé et dispositif pour retourner par rétroaction des données d'état de canal Download PDF

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Publication number
WO2013091535A1
WO2013091535A1 PCT/CN2012/086878 CN2012086878W WO2013091535A1 WO 2013091535 A1 WO2013091535 A1 WO 2013091535A1 CN 2012086878 W CN2012086878 W CN 2012086878W WO 2013091535 A1 WO2013091535 A1 WO 2013091535A1
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WIPO (PCT)
Prior art keywords
state information
channel state
terminal side
select
base station
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PCT/CN2012/086878
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English (en)
Chinese (zh)
Inventor
郭森宝
孙云锋
任敏
张晨晨
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中兴通讯股份有限公司
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Publication of WO2013091535A1 publication Critical patent/WO2013091535A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • 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
    • H04B7/06—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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for feedback of channel state information.
  • LTE Long Term Evolution
  • the Long Term Evolution (LTE) system has undergone accurate research on the R11 technology after undergoing several versions of R8/9/10.
  • R9 and R10 are subject to further product planning.
  • R10 adds many new features to the former two, such as DMRS (Demodulation Reference Signal), CSI-RS (Channel State Information Reference Signal).
  • DMRS Demodulation Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • Pilot characteristics such as information reference signal, transmission and feedback characteristics such as 8 antenna support, etc.
  • elCIC enhanced Inter-Cell Interference Cancelling
  • the technology for solving the interference problem between CSI-RS configuration resources mainly considers the CSI-RS configuration resource interference avoidance under the isomorphic network in the initial stage of the R10 phase, and the mainstream considerations include the eCIC technology and the Co-Multi-point (Coordinated Multi-point). )technology.
  • CoMP as its name implies, is that multiple nodes cooperate to send data to one or more UEs at the same time-frequency resource or different time-frequency resources.
  • CoMP technology can reduce the interference between CSI-RS configuration resources, improve the throughput of CSI-RS configuration resources, and expand CSI-RS configuration resource coverage.
  • more scenarios were introduced.
  • the design of the CoMP part can be considered for design, so CoMP technology did not go deeper after the 60bis meeting.
  • SI Sty Item
  • the unified evaluation architecture was determined mainly by planning scenarios and CoMP transmission technologies. The two-stage CoMP evaluation proved that CoMP technology can obtain significant performance gain.
  • CoMP SI conclusion is that JT (Joint Transmission), DPS (Dynamic Point Selection, Dynamic CSI-RS configuration resource selection) with/without muting, CS (Coordinated Scheduling) With/without muting, CB (Coordinated Beamforming) for further research.
  • What needs to be considered first before the research on various technologies of CoMP is the difference between CoMP technology and R8/9/10 technology, including how the control signaling of CoMP supports the notification of CoMP measurement set, how to support The requirements of different transmission technologies of CoMP and how the UE measures and reports the CSI (Channel State Information) of multiple nodes.
  • how the UE measures and reports the CSI of multiple nodes is one of the primary problems that CoMP technology needs to solve.
  • the current discussion of CoMP feedback can be divided into periodic feedback and aperiodic feedback, aggregated channel state information feedback and non-aggregated channel state information feedback.
  • the aggregated channel state information feedback refers to global feedback by aggregating channel state information of a plurality of nodes into channel state information of one node.
  • the measurement set includes two nodes, wherein the channel state information of the node 1 is HI, and the channel state information of the node 2 is H2.
  • the non-aggregated channel state information feedback can be further divided into independent single CSI-RS configuration resource feedback and independent single CSI-RS configuration resource feedback plus CSI-RS configuration resource-to-resource correction information.
  • the so-called independent single CSI-RS configuration resource feedback refers to independent measurement related calculation and feedback according to the channel state information of each node.
  • the so-called independent single CSI-RS configuration resource feedback plus CSI-RS configuration inter-resource correction information refers to independent measurement correlation calculation according to channel state information of each node, and calculation of phase and/or amplitude information between each node and feedback. .
  • the aggregate CQI refers to the CQI fed back by the UE side is an aggregated CQI corresponding to one or more CSI-RS configuration information, and the UE uses multiple CSI-RS configuration information to find corresponding
  • the time-frequency position of the CSI-RS is measured to obtain pre-encoded weight information and the interference information is obtained by using other pilots, and then the calculation is performed.
  • the UE assumes that one or more nodes corresponding to the CSI-RS configuration information are given to it.
  • the data is sent to obtain the CQI value corresponding to the joint transmission of the plurality of nodes.
  • the measurement set may include three CSI-RS configuration information, and there are three possibilities for a CSI-RS configuration information to be aggregated. There are three possibilities for CSI-RS configuration information. There is one possibility for a CSI-RS configuration information to be aggregated. There are a total of seven possibilities. Therefore, there are many possibilities for aggregating CQIs, and each of them may be called an aggregation possibility.
  • the size of the traditional feedback subband is fixed in the standard and has a certain relationship with the system bandwidth. In PUCCH feedbackmode 2-0 and 2-1, the relationship between the size of the feedback subband and the system bandwidth is shown in Table la:
  • a method for feeding back channel state information includes: a subband size required for a base station side to select a terminal side feedback channel state information; and a base station side to send a selected subband size To the terminal side, the terminal side is notified to feed back channel state information according to the subband size.
  • the sub-band size required for the base station side to select the terminal-side feedback channel state information includes: the base station side selects a sub-band size required by the terminal-side feedback channel state information by using the user-specific UE-Specific high-layer signaling.
  • the length of the high layer signaling is log 2 N bits, and the high layer signaling is used to indicate that the subband size adopted by the terminal side is N bits, and the log 2 N bits are used to perform channel state information feedback.
  • the base station side selects a subband size by using UE-Specific high layer signaling, and further includes: a subband required by the base station side to select terminal side feedback channel state information by using UE-Specific high layer signaling and system bandwidth adopted by the current system.
  • the N-bit subband size includes the reference subband size of the current system.
  • the base station side selects a sub-band size required by the terminal-side feedback channel state information by the UE-Specific high-layer signaling and the system bandwidth used by the current system, including: when the system bandwidth used by the current system is 6-7, the base station side The subband size required to select the terminal side feedback channel state information is not present, that is, NA; when the system bandwidth used by the current system is 8-10, the subband size required for the base station side to select the terminal side feedback channel state information is 8 When the system bandwidth used by the current system is 11-26, the sub-band size required for the base station side to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 27-63, the base station side selects the terminal side feedback channel.
  • the subband size required for the status information is 12; when the system bandwidth used by the current system is 64-110, the subband size required for the base station side to select the terminal side feedback channel state information is 16.
  • the base station side selects a sub-band size required by the terminal-side feedback channel state information by the UE-Specific high-layer signaling and the system bandwidth used by the current system, including: when the system bandwidth used by the current system is 6-7, the base station side The subband size required to select the feedback information on the terminal side is not present, that is, NA; when the system bandwidth used by the current system is 8-10, the subband size required for the base station side to select the feedback information of the terminal side is 2 When the system bandwidth used by the current system is 11-26, the sub-band size required for the base station side to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 27-63, the base station side selects the terminal side feedback channel.
  • the subband size required for the status information is 3; when the system bandwidth used by the current system is 64-110, the subband size required for the base station side to select the terminal side feedback channel state information is 4.
  • the base station side selects a sub-band size required by the terminal-side feedback channel state information by the UE-Specific high-layer signaling and the system bandwidth used by the current system, including: when the system bandwidth used by the current system is 6-7, the base station side
  • the subband size required to select the feedback information of the terminal side of the terminal side is not present, that is, NA; when the system bandwidth used by the current system is 8-10, the subband size required for the base station side to select the feedback state information of the terminal side is 1
  • the system bandwidth used by the current system is 11-26, the sub-band size required for the base station side to select the terminal side feedback channel state information is 1; when the system bandwidth used by the current system is 27-63, the base station side selects the terminal side feedback channel.
  • the subband size required for the status information is 2; when the system bandwidth used by the current system is 64-110, the subband size required for the base station side to select the terminal side feedback channel state information is 2.
  • the base station side selects a subband size to be used by the terminal side to feed back the channel state information, and the method includes: determining, by the base station side, a subband size set by using UE-Specific high layer signaling, where the subband size set includes a terminal side that can be used for At least one sub-band size of the channel state information is fed back; the base station side selects one sub-band size in the sub-band size set by the triggering signaling of the dynamic PUSCH aperiodic feedback as the sub-band size required for the terminal side to feed back the channel state information.
  • the base station side determines that the subband size set is ordered in the following format: ⁇ S, , , Ar , N ⁇ l, S ⁇ +l, l ⁇ ⁇ N ⁇ , where Si is the subband size of the subband size set.
  • the subband size set is a subset of ⁇ 1, 2, 3, 4, 6, 8, 12, 16 ⁇ .
  • the base station side determines the subband size set by using UE-Specific high layer signaling, and the method includes: determining, by the base station side, the subband size set by using the UE-Specific high layer signaling and the system bandwidth used by the current system.
  • the base station side selects a sub-band size required by the terminal-side feedback channel state information by the UE-Specific high-layer signaling and the system bandwidth used by the current system, including: when the system bandwidth used by the current system is 6-7, the base station side The subband size required to select the feedback information of the terminal side of the terminal side is not present, that is, NA; when the system bandwidth used by the current system is 8-10, the subband size required for the base station side to select the feedback state information of the terminal side is 4 When the system bandwidth used by the current system is 11-26, the sub-band size required for the base station side to select the terminal side feedback channel state information is 4; when the system bandwidth used by the current system is 27-63, the base station side selects the terminal side feedback channel.
  • the subband size required for the status information is 6; when the system bandwidth used by the current system is 64-110, the subband size required for the base station side to select the terminal side feedback channel state information is 8.
  • the base station side selects a sub-band size required by the terminal-side feedback channel state information by the UE-Specific high-layer signaling and the system bandwidth used by the current system, including: when the system bandwidth used by the current system is 6-7, the base station side The subband size required to select the terminal side feedback channel state information is not present, that is, NA; when the system bandwidth used by the current system is 8-10, the subband size required for the base station side to select the terminal side feedback channel state information is 8 When the system bandwidth used by the current system is 11-26, the sub-band size required for the base station side to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 27-63, the base station side selects the terminal side feedback channel.
  • the subband size required for the status information is 12; when the system bandwidth used by the current system is 64-110, the subband size required for the base station side to select the terminal side feedback channel state information is 16.
  • the base station side selects a sub-band size required by the terminal-side feedback channel state information by the UE-Specific high-layer signaling and the system bandwidth used by the current system, including: when the system bandwidth used by the current system is 6-7, The sub-band size required for the base station side to select the terminal-side feedback channel state information is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station side selects the sub-band size required by the terminal side to feed back the channel state information.
  • the sub-band size required for the base station side to select the feedback information of the terminal side is 1; when the system bandwidth used by the current system is 27-63, the base station side selects the terminal side.
  • the subband size required to feed back the channel state information is 2; when the system bandwidth used by the current system is 64-110, the subband size required for the base station side to select the terminal side feedback channel state information is 2.
  • the base station side selects a subband size to be used by the terminal side to feed back the channel state information
  • the method includes: determining, by the base station side, a subband size ratio set by using UE-Specific high layer signaling, where the subband size ratio set includes at least one ratio
  • the value is a ratio of the subband size that can be used for the feedback channel state information on the terminal side to the reference subband size of the current system.
  • the base station side selects one in the subband size set by the triggering signaling of the dynamic PUSCH aperiodic feedback.
  • the ratio value, the product of the scale value and the reference subband size is used as the subband size required for the terminal side feedback channel state information.
  • the subband size scale set is a subset of / 2, 1 / 3, 1, 2, 3, 4 ⁇ .
  • the base station side selects a sub-band size to be used by the terminal side to feed back the channel state information, and the method includes: the base station side uses the UE-Specific dynamic PUSCH aperiodic feedback trigger signaling, and selects the terminal side to feed back the current aperiodic channel state information.
  • the subband size that needs to be used.
  • the base station side selects a sub-band size to be used by the terminal side to feed back the current aperiodic feedback channel state information by using the triggering signaling of the dynamic PUSCH aperiodic feedback of the UE-Specific, including: the dynamic of the UE-Specific by the base station side
  • the triggering signaling of the non-periodic feedback of the PUSCH and the system bandwidth used by the current system select the subband size that the terminal side needs to use to feed back the current aperiodic channel state information.
  • the base station side selects a sub-band size required by the terminal-side feedback channel state information by the UE-Specific high-layer signaling and the system bandwidth used by the current system, including: when the system bandwidth used by the current system is 6-7, the base station side The subband size required to select the terminal side feedback channel state information is not present, that is, NA; when the system bandwidth used by the current system is 8-10, the subband size required for the base station side to select the terminal side feedback channel state information is 8 When the system bandwidth used by the current system is 11-26, the sub-band size required for the base station side to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 27-63, the base station side selects the terminal side feedback channel.
  • the subband size required for the status information is 12; when the system bandwidth used by the current system is 64-110, the subband size required for the base station side to select the terminal side feedback channel state information is 16.
  • the base station side selects a sub-band size required by the terminal-side feedback channel state information by the UE-Specific high-layer signaling and the system bandwidth used by the current system, including: when the system bandwidth used by the current system is 6-7, the base station side The subband size required to select the feedback information of the terminal side of the terminal side is absent, that is, NA; When the system bandwidth used by the system is 8-10, the sub-band size required for the base station side to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 11-26, the base station side selects the terminal side feedback channel state information.
  • the required subband size is 2; when the system bandwidth used by the current system is 27-63, the subband size required for the base station side to select the terminal side feedback channel state information is 3; when the system bandwidth used by the current system is 64-110 The sub-band size required for the base station side to select the terminal side feedback channel state information is 4.
  • the base station side selects a sub-band size required by the terminal-side feedback channel state information by the UE-Specific high-layer signaling and the system bandwidth used by the current system, including: when the system bandwidth used by the current system is 6-7, the base station side The subband size required to select the feedback information of the terminal side of the terminal side is not present, that is, NA; when the system bandwidth used by the current system is 8-10, the subband size required for the base station side to select the feedback state information of the terminal side is 1 When the system bandwidth used by the current system is 11-26, the sub-band size required for the base station side to select the terminal side feedback channel state information is 1; when the system bandwidth used by the current system is 27-63, the base station side selects the terminal side feedback channel.
  • the subband size required for the status information is 2; when the system bandwidth used by the current system is 64-110, the subband size required for the base station side to select the terminal side feedback channel state information is 2.
  • the method further includes: configuring, by the base station side, the terminal side to determine whether the terminal side is configured as an enhanced physical downlink control channel EPDCCH transmission mode terminal;
  • the sub-band size that is required to be used by the base station side to select the channel-side feedback channel state information includes: a sub-band size that the base station side needs to select the terminal-side feedback channel state information according to the configuration result.
  • the method further includes: configuring, by the base station side, the terminal side to determine a feedback mode of the terminal side feedback channel state information; and selecting, by the base station side, the terminal side feedback channel
  • the subband size to be used for the status information includes: the subband size that the base station side needs to select the terminal side feedback channel state information according to the configuration result.
  • a method for feeding back another channel state information including: receiving, by a terminal side, a notification message sent by a base station side, where the notification message includes that the terminal side selects channel state information that is selected by the base station side.
  • a feedback device for channel state information which is disposed on a base station side, and includes: a selecting module configured to select a subband size to be used by the terminal side to feed back channel state information; a sending module, setting To send the selected subband size to the terminal side, the terminal side is notified to feed back the channel state information according to the subband size.
  • the selection module is further configured to select a sub-band size required by the terminal-side feedback channel state information by the high-level signaling of the user-specific UE-Specific, wherein the length of the high-layer signaling is log2N bits, and the high-level signaling is used.
  • the sub-band size used by the terminal side is N bits
  • the log 2N bits are used to perform channel state information feedback.
  • the selecting module further includes: a first determining unit, configured to determine UE-Specific high-level signaling and a system bandwidth adopted by the current system; and a first selecting unit, configured to adopt UE-Specific high-level signaling and current system adoption The system bandwidth selects the subband size required by the terminal side to feed back the channel state information.
  • the first selecting unit is further configured to: when the system bandwidth used by the current system is 6-7, the subband size required to select the terminal side feedback channel state information is absent, that is, NA; the system bandwidth used by the current system 8-10, the subband size required to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 11-26, the subband size required to select the terminal side feedback channel state information is 8; When the system bandwidth used by the current system is 27-63, the subband size required to select the feedback information of the terminal side is 12; when the system bandwidth used by the current system is 64-110, the terminal side needs to feedback the channel status information.
  • the subband size is 16.
  • the first selecting unit is further configured to: when the system bandwidth used by the current system is 6-7, the subband size required to select the terminal side feedback channel state information is absent, that is, NA; the system bandwidth used by the current system 8-10, the subband size required to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 11-26, the subband size required to select the terminal side feedback channel state information is 2; When the system bandwidth used by the current system is 27-63, the sub-band size required to select the feedback information of the terminal side is 3; when the system bandwidth used by the current system is 64-110, the terminal side needs to feedback the channel status information.
  • the subband size is 4.
  • the first selecting unit is further configured to: when the system bandwidth used by the current system is 6-7, the subband size required to select the terminal side feedback channel state information is absent, that is, NA; the system bandwidth used by the current system When 8-10, the subband size required to select the feedback information of the terminal side is 1; when the system bandwidth used by the current system is 11-26, the subband size required to select the feedback state information of the terminal side is 1; When the system bandwidth used by the current system is 27-63, the subband size required to select the feedback information of the terminal side is 2; when the system bandwidth used by the current system is 64-110, the terminal side needs to feedback the channel status information.
  • the subband size is 2.
  • the selecting module comprises: a second determining unit, configured to determine a subband size set by high layer signaling of UE-Specific, wherein the subband size set includes at least one subband size that the terminal side can use to feed back channel state information And a second selecting unit, configured to select one subband size in the subband size set by using trigger signaling of the dynamic PUSCH aperiodic feedback, as the subband size required for the terminal side to feed back the channel state information.
  • the second determining unit is further configured to determine that the subband size set is ordered in the following format: ⁇ S, , , Ar , N ⁇ l, S ⁇ +l, l ⁇ ⁇ N ⁇ , where Si is a subband size set Subband size.
  • the second determining unit is further configured to determine the subband size set by the UE-Specific high layer signaling and the system bandwidth adopted by the current system.
  • the second selecting unit is further configured to: when the system bandwidth used by the current system is 6-7, the subband size required to select the terminal side feedback channel state information is absent, that is, NA; the system bandwidth used by the current system 8-10, the subband size required to select the feedback information on the terminal side is 4; when the system bandwidth used by the current system is 11-26, the subband size required to select the feedback state information of the terminal side is 4; When the system bandwidth used by the current system is 27-63, the sub-band size required to select the feedback information on the terminal side is 6; when the system bandwidth used in the current system is 64-110, the terminal side needs to feedback the channel status information.
  • the subband size is 8.
  • the second selecting unit is further configured to: when the system bandwidth used by the current system is 6-7, the subband size required to select the terminal side feedback channel state information is absent, that is, NA; the system bandwidth used by the current system 8-10, the subband size required to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 11-26, the subband size required to select the terminal side feedback channel state information is 8; When the system bandwidth used by the current system is 27-63, the subband size required to select the feedback information of the terminal side is 12; when the system bandwidth used by the current system is 64-110, the terminal side needs to feedback the channel status information.
  • the subband size is 16.
  • the second selecting unit is further configured to: when the system bandwidth used by the current system is 6-7, the subband size required to select the terminal side feedback channel state information is absent, that is, NA; the system bandwidth used by the current system When 8-10, the subband size required to select the feedback information of the terminal side is 1; when the system bandwidth used by the current system is 11-26, the subband size required to select the feedback state information of the terminal side is 1; When the system bandwidth used by the current system is 27-63, the subband size required to select the feedback information of the terminal side is 2; when the system bandwidth used by the current system is 64-110, the terminal side needs to feedback the channel status information.
  • the subband size is 2.
  • the selecting module includes: a third determining unit, configured to determine a subband size ratio set by using UE-Specific high layer signaling, where the subband size ratio set includes at least one scale value, and the ratio value is used by the terminal side. a ratio of a subband size of the feedback channel state information to a reference subband size of the current system; a third selection unit configured to select a proportional value in the subband size set by trigger signaling of dynamic PUSCH aperiodic feedback, The product of the value and the reference subband size is used as the subband size required for the terminal side feedback channel state information.
  • the selecting module is further configured to select, by using UE-Specific dynamic PUSCH aperiodic feedback trigger signaling, a sub-band size that the terminal side needs to use to feed back the current aperiodic channel state information.
  • the selecting module comprises: a fourth determining unit, configured to determine a UE-Specific dynamic PUSCH aperiodic feedback trigger signaling and a system bandwidth adopted by the current system, and a fourth selecting unit, configured to pass the UE-Specific dynamic The triggering signaling of the PUSCH aperiodic feedback and the system bandwidth used by the current system select the subband size that the terminal side needs to use to feed back the current aperiodic channel state information.
  • the fourth selecting unit is further configured to: when the system bandwidth used by the current system is 6-7, the subband size required to select the terminal side feedback channel state information is absent, that is, NA; the system bandwidth used by the current system 8-10, the subband size required to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 11-26, the subband size required to select the terminal side feedback channel state information is 8; When the system bandwidth used by the current system is 27-63, the subband size required to select the feedback information of the terminal side is 12; when the system bandwidth used by the current system is 64-110, the terminal side needs to feedback the channel status information.
  • the subband size is 16.
  • the fourth selecting unit is further configured to: when the system bandwidth used by the current system is 6-7, the subband size required to select the terminal side feedback channel state information is absent, that is, NA; the system bandwidth used by the current system 8-10, the subband size required to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 11-26, the subband size required to select the terminal side feedback channel state information is 2; When the system bandwidth used by the current system is 27-63, the sub-band size required to select the feedback information of the terminal side is 3; when the system bandwidth used by the current system is 64-110, the terminal side needs to feedback the channel status information.
  • the subband size is 4.
  • the fourth selecting unit is further configured to: when the system bandwidth used by the current system is 6-7, the subband size required to select the terminal side feedback channel state information is absent, that is, NA; the system bandwidth used by the current system When 8-10, the subband size required to select the feedback information of the terminal side is 1; when the system bandwidth used by the current system is 11-26, the subband size required to select the feedback state information of the terminal side is 1; When the system bandwidth used by the current system is 27-63, the subband size required to select the feedback information of the terminal side is 2; when the system bandwidth used by the current system is 64-110, the terminal side needs to feedback the channel status information.
  • the subband size is 2.
  • the feedback device of the channel state information further includes: a determining module, configured to configure the terminal side to determine whether the terminal side is configured to be in the EPDCCH transmission mode before selecting the subband size to be used by the terminal side to feed back the channel state information
  • the terminal the selection module is further configured to select a subband size to be used by the terminal side to feedback channel state information according to the configuration result.
  • the feedback device of the channel state information further includes: a configuration module, configured to configure the terminal side to determine a feedback mode of the feedback information of the terminal side feedback channel before selecting the subband size to be used by the terminal side to feed back the channel state information
  • the selection module is also set to select the subband size required for the terminal side feedback channel state information according to the configuration result.
  • a feedback device for providing another channel state information includes: a receiving module, configured to receive a notification message sent by the base station side, where the notification message includes, selected by the base station side, The subband size required for the terminal side to feed back channel state information; and the feedback module is configured to feed back channel state information according to the subband size.
  • a receiving module configured to receive a notification message sent by the base station side, where the notification message includes, selected by the base station side, The subband size required for the terminal side to feed back channel state information
  • the feedback module is configured to feed back channel state information according to the subband size.
  • FIG. 1 is a preferred flowchart of a method for feeding back channel state information according to an embodiment of the present invention
  • FIG. 2 is a block diagram showing a preferred structure of a feedback device for channel state information according to an embodiment of the present invention
  • 3 is a block diagram of a preferred structure of a selection module in a feedback device for channel state information according to an embodiment of the present invention
  • FIG. 4 is a block diagram showing another preferred structure of a selection module in a feedback device for channel state information according to an embodiment of the present invention
  • 5 is a block diagram showing still another preferred structure of a selection module in a feedback device for channel state information according to an embodiment of the present invention
  • Embodiment 1 provides a preferred method for feeding back channel state information. As shown in FIG. 1, the specific steps of the method include:
  • S102 a subband size required for the base station side to select the terminal side feedback channel state information
  • the base station side sends the selected sub-band size to the terminal side, and notifies the terminal side to feed back the channel state information according to the sub-band size.
  • the sub-band size that is required to be used by the base station side to determine the channel-side feedback channel state information is sent to the terminal side to implement the configuration of the sub-band size of the terminal side.
  • the channel selection feature is reduced due to the inability to configure the sub-band size, and the channel selection feature is enhanced to ensure that the base station side reduces the overhead of uplink resources in different scenarios or in the configuration of the terminal side mode. Obtain accurate channel state information, which reduces resource consumption.
  • the sub-band size required for the base station side to select the terminal side feedback channel state information includes: the base station side needs to select the terminal side feedback channel state information through the high-level signaling of the user-specific UE-Specific The sub-band size, where the high-level signaling is log 2 N bits, and the high-level signaling is used to indicate that the sub-band size adopted by the terminal side is N bits, and the log 2 N bits are used to perform channel state information feedback.
  • the N-bit subband size includes the reference subband size of the current system.
  • the base station side selects the subband size required by the terminal side to feed back the channel state information through the UE-Specific high layer signaling and the system bandwidth adopted by the current system. Based on this, the present invention is implemented
  • the sub-band size that should be adopted by the terminal side is determined according to different system bandwidths used by the current system:
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 8; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 12; when the system bandwidth used by the current system is 64-110, the base station side selects the terminal side to feed back the channel state information.
  • the subband size is 16.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 2; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 3; when the system bandwidth used by the current system is 64-110, the base station side needs to select the terminal side feedback channel state information.
  • the subband size is 4.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 1; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 1; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 64-110, the base station side needs to select the terminal side feedback channel state information.
  • the subband size is 2.
  • the base station side selects a subband size to be used by the terminal side to feed back the channel state information
  • the method includes: determining, by the base station side, a subband size set by using UE-Specific high layer signaling, where the subband size set
  • the method includes: at least one sub-band size that can be used by the terminal side to feed back the channel state information; and the base station side selects one sub-band size in the sub-band size set by the triggering signaling of the dynamic PUSCH aperiodic feedback, as required by the terminal side to feed back the channel state information.
  • Subband size In a preferred embodiment of the present invention, the base station side determines that the subband size set can be sorted in the following format:
  • the base station side configures UE1 to adopt different sub-band sizes through UE-Specific high-level signaling. For example, if the UE1 needs to use the feedback of the sub-band size of 2, the base station side only needs to notify the UE1 to 001. Preferably, the base station side can notify the UE of the corresponding sub-band size by using 3-bit high-level signaling.
  • the base station side may determine the subband size set by using the UE-Specific high layer signaling and the system bandwidth adopted by the current system. Based on this, the embodiment of the present invention provides several specific examples. In each instance, the sub-band size that should be adopted by the terminal side is determined according to different system bandwidths used by the current system: 1) The system bandwidth used by the current system is 6- At 7 o'clock, the base station side selects the sub-band size required for the terminal-side feedback channel state information to be absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station side selects the terminal side to feed back the channel state information.
  • the subband size is 4; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the feedback information of the terminal side is 4; when the system bandwidth used by the current system is 27-63, the base station side
  • the subband size required to select the terminal side feedback channel state information is 6; when the system bandwidth used by the current system is 64-110, the subband size required for the base station side to select the terminal side feedback channel state information is 8.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 8; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 12; when the system bandwidth used by the current system is 64-110, the base station side selects the terminal side to feed back the channel state information.
  • the subband size is 16.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 1; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 1; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 64-110, the base station side needs to select the terminal side feedback channel state information.
  • the subband size is 2.
  • the base station side may determine a subband size ratio set by using UE-Specific high layer signaling, where the subband size ratio set includes at least one scale value, and the ratio value is used by the terminal side for the feedback channel.
  • the product is used as the subband size required for the terminal side feedback channel state information.
  • a subset of the subband size scale set of 0 / 2, 1 / 3, 1, 2, 3, 4 ⁇ is taken as an example.
  • the 0 / 2, 1 / 3, 1, 2, 3, 4 ⁇ may be a range of sub-band sizes specified by the standard fixed. It is assumed that UE1 is an R11 user, and the base station side configures UE1 to adopt different subband sizes through UE-Specific high-level signaling. When UE1 needs to configure feedback when the subband size is half of the original R10 subband size, then the base station side only It is necessary to notify the UE1 to a 0.
  • the base station side only needs to notify the UE1-3, that is, the base station side passes the 3-bit high layer.
  • the signaling can inform the UE of the corresponding subband size.
  • the UE determines the corresponding subband size in R10 according to the system bandwidth and the feedback manner, and then determines the actual feedback subband size according to the subband configuration parameters configured by the base station side high layer signaling.
  • the base station side selects a subband size to be used by the terminal side to feed back the current aperiodic channel state information by using UE-Specific dynamic PUSCH aperiodic feedback trigger signaling.
  • the base station side may select, by using UE-Specific dynamic PUSCH aperiodic feedback trigger signaling and the system bandwidth used by the current system, the terminal to be used by the terminal side to feed back the current aperiodic channel state information.
  • Belt size the embodiment of the present invention provides several specific examples. In each instance, the sub-band size that should be adopted by the terminal side is determined according to different system bandwidths used by the current system:
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 8; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 12; when the system bandwidth used by the current system is 64-110, the base station side selects the terminal side to feed back the channel state information.
  • the subband size is 16.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station Side selection The subband size required for the terminal side to feed back the channel state information is 2; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 2; When the bandwidth is 27-63, the base station side selects the sub-band size required for the terminal side feedback channel state information to be 3; when the system bandwidth used by the current system is 64-110, the base station side selects the sub-terminal side to feed back the channel state information.
  • the belt size is 4.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 1; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 1; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 64-110, the base station side needs to select the terminal side feedback channel state information.
  • the subband size is 2.
  • the resource configuration method before the base station side selects the subband size to be used by the terminal side to feed back the channel state information, the resource configuration method further includes: configuring, by the base station side, the terminal side to determine whether the terminal side is configured as an EPDCCH transmission mode. The terminal; the base station side selects the subband size to be used by the terminal side to feed back the channel state information according to the configuration result.
  • the method before the base station side selects the subband size to be used by the terminal side to feed back the channel state information, the method further includes: configuring, by the base station side, the feedback mode of the terminal side feedback channel state information; The side selects the subband size to be used for the feedback information of the terminal side according to the configuration result.
  • Embodiment 2 This embodiment provides a feedback device for the preferred channel state information. As shown in FIG. 2, the feedback device for the channel state information is disposed on the base station side, and includes: a selection module 202 configured to select a terminal side feedback channel. The sub-band size is required to be used by the status information.
  • the sending module 204 is coupled to the selecting module 202, and configured to send the selected sub-band size to the terminal side, and notify the terminal side to feed back the channel status information according to the sub-band size.
  • the selecting module 202 is further configured to select a subband size required by the terminal side to feed back channel state information by using high layer signaling of the user-specific UE-Specific, wherein the length of the high layer signaling For the log 2 N bit, the high layer signaling is used to indicate that the subband size adopted by the terminal side is N bits, and the log 2 N bits are used to perform channel state information feedback.
  • the selecting module 202 is further configured to select a subband size required by the terminal side to feed back channel state information by using high layer signaling of the user-specific UE-Specific, wherein the length of the high layer signaling For the log 2 N bit, the high layer signaling is used to indicate that the subband size adopted by the terminal side is N bits, and the log 2 N bits are used to perform channel state information feedback.
  • the selecting module 202 further includes: a first determining unit 302, configured to determine a UE-Specific high layer signaling and a system bandwidth adopted by the current system; 304, coupled to the first determining unit 302, configured to select a subband size required by the terminal side feedback channel state information by the UE-Specific high layer signaling and the system bandwidth adopted by the current system.
  • the embodiment of the present invention provides a manner in which the preferred first selecting unit 304 selects the subband size required by the terminal side feedback channel state information through the UE-Specific high layer signaling and the system bandwidth adopted by the current system. In each instance, determine the subband size that should be used on the terminal side according to the different system bandwidths used by the current system:
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 8; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 12; when the system bandwidth used by the current system is 64-110, the base station side selects the terminal side to feed back the channel state information.
  • the subband size is 16.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 2; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 3; when the system bandwidth used by the current system is 64-110, the base station side needs to select the terminal side feedback channel state information.
  • the subband size is 4.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 1; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 1; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 64-110, the base station side needs to select the terminal side feedback channel state information.
  • the subband size is 2.
  • the selecting module 202 further includes: a second determining unit 402, configured to determine a subband size set by using UE-Specific high layer signaling, where the subband size set includes The terminal side can be configured to feed back at least one subband size of the channel state information.
  • the second selecting unit 404 is coupled to the second determining unit 402, and is configured to select one of the subband size sets by triggering signaling of dynamic PUSCH aperiodic feedback.
  • the subband size is used as the subband size required for the terminal side feedback channel state information.
  • the second determining unit 402 is further configured to determine that the subband size set is sorted according to the following format: ⁇ S, , , Ar , N ⁇ l, S ⁇ +l, l ⁇ ⁇ N ⁇ , Where is the subband size of the subband size set.
  • the sub-band size set is a subset of ⁇ 1, 2, 3, 4, 6, 8, 12, 16 ⁇ as an example.
  • the second determining unit 402 configures the UE1 to adopt different UEs by using UE-Specific high-level signaling.
  • the UE1 needs to configure the feedback of the sub-band size to be 2, then the base station side only needs to notify the UE1 - 001.
  • the base station side can notify the UE of the corresponding sub-subsequent through 3-bit high-level signaling.
  • Belt size Based on this, the embodiment of the present invention provides that the preferred second selection unit 404 selects one sub-band size in the sub-band size set by using the dynamic PUSCH aperiodic feedback trigger signaling, as required for the terminal side feedback channel state information.
  • the subband size is determined in each instance according to the different system bandwidths used by the current system.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 4; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 4; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 6; when the system bandwidth used by the current system is 64-110, the base station side selects the terminal side to feed back the channel state information.
  • the subband size is 8.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 8; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 12; when the system bandwidth used by the current system is 64-110, the base station side selects the terminal side to feed back the channel state information.
  • the subband size is 16.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 1; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 1; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 64-110, the base station side needs to select the terminal side feedback channel state information.
  • the subband size is 2.
  • the selecting module 202 further includes: a third determining unit 502, configured to determine a subband size ratio set by using UE-Specific high layer signaling, where the subband size ratio The set includes at least one ratio value, and the scale value is a ratio of a subband size that can be used by the terminal side to feedback the channel state information to a reference subband size of the current system.
  • the third selection unit 504 is coupled to the third determining unit 502, and is configured.
  • a proportional value is selected in the subband size set, and the product of the proportional value and the reference subband size is used as the subband size required for the terminal side feedback channel state information.
  • the selection module 202 is also set to be dynamic by UE-Specific
  • the selecting module 202 further includes: a fourth determining unit 602, configured to determine UE-Specific dynamic PUSCH aperiodic feedback trigger signaling and a system adopted by the current system The bandwidth, the fourth selecting unit 604 is coupled to the fourth determining unit 602, configured to select the terminal side to feed back the current aperiodic channel state information by using trigger signaling of UE-Specific dynamic PUSCH aperiodic feedback and system bandwidth adopted by the current system.
  • the subband size that needs to be used.
  • the embodiment of the present invention provides that the preferred fourth selection unit 604 selects the terminal side to feed back the current aperiodic channel state information by using UE-Specific dynamic PUSCH aperiodic feedback trigger signaling and the system bandwidth adopted by the current system.
  • the size of the subband to be used is determined. In each instance, the subband size that should be used on the terminal side is determined according to the different system bandwidths used by the current system:
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 8; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 8; Department When the system bandwidth is 27-63, the base station side selects the sub-band size required for the terminal side feedback channel state information to be 12; when the system bandwidth used by the current system is 64-110, the base station side selects the terminal side to feed back the channel state information.
  • the subband size is 16.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 2; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 3; when the system bandwidth used by the current system is 64-110, the base station side needs to select the terminal side feedback channel state information.
  • the subband size is 4.
  • the sub-band size required for the base station side to select the feedback state information of the terminal side is absent, that is, NA; when the system bandwidth used by the current system is 8-10, the base station The subband size required to select the terminal side feedback channel state information is 1; when the system bandwidth used by the current system is 11-26, the subband size required for the base station side to select the terminal side feedback channel state information is 1; When the system bandwidth is 27-63, the sub-band size required for the base station side to select the terminal side feedback channel state information is 2; when the system bandwidth used by the current system is 64-110, the base station side needs to select the terminal side feedback channel state information.
  • the subband size is 2.
  • the feedback device of the channel state information further includes: a determining module 702, configured to: before selecting a subband size to be used by the terminal side to feed back channel state information, to the terminal side
  • the configuration is performed to determine whether the terminal side is configured as a terminal of an Enhanced Physical Downlink Control Channel (EPDCCH) transmission mode.
  • the selection module 202 is further configured to select a terminal side feedback channel state information according to the configuration result.
  • the subband size used In a preferred embodiment of the present invention, as shown in FIG.
  • the feedback device of the channel state information further includes: a configuration module 802, configured to: before selecting a subband size to be used by the terminal side to feed back channel state information, to the terminal side
  • the configuration is performed to determine a feedback mode of the feedback channel state information of the terminal side.
  • the selection module 202 is further configured to select a subband size to be used by the terminal side to feedback the channel state information according to the configuration result.
  • This embodiment further provides another preferred method for feeding back channel state information. As shown in FIG. 9, the method includes: S902: The terminal side receives the notification message sent by the base station side, where the notification message includes a subband size that is selected by the base station side and needs to be used by the terminal side to feed back the channel state information.
  • the terminal side feeds back channel state information according to the subband size.
  • the present embodiment further provides a feedback device for the preferred channel state information, as shown in FIG. 10, which is disposed on the terminal side, and includes: a receiving module 1002, configured to receive a notification message sent by the base station side, where the notification message includes the base station The sub-band size required for the terminal-side feedback channel state information is selected by the side; the feedback module 1004 is configured to feed back the channel state information according to the sub-band size.
  • Embodiment 3 The preferred embodiment described herein is used to further explain the feedback scheme of channel state information, but it is worth noting that the preferred embodiment is only for better description of the present invention and does not constitute an improper use of the present invention. limited.
  • Example 1 Assume that UE1 is a user of R11, and the base station side configures the periodic channel state information feedback of UE1 into a subband feedback mode through high layer signaling. At this time, the base station side can notify the UE1 of the feedback element by using another 2 bits of high layer signaling.
  • the size of the band, the current system bandwidth and the sub-band size have multiple mapping relationships, the mapping relationship can be represented by different tables, and the high-level signaling can select one of the multiple tables according to the current scene or mode, and use the selected table to determine Subband size.
  • the role of the higher layer signaling mentioned later is similar and will not be described again.
  • 00 indicates that the feedback subband of UE1 is fed back according to the size of Table 1
  • 01 indicates that the feedback subband size of UE1 is fed back according to the size of Table 2.
  • 10 indicates that the feedback subband of UE1 is fed back according to the size of Table 3
  • 11 indicates that the feedback subband size of UE1 is fed back according to the size of Table 4.
  • Example 2 Assume that UE1 is a user of R11, and the base station side configures the non-period channel state information of UE1 to be the subband feedback mode selected by the UE through high layer signaling. At this time, the base station side can notify UE1 through another 2 bits of high layer signaling.
  • the feedback subband size used For example: 00 indicates that the feedback subband of UE1 is fed back according to the size of Table 1, and 01 indicates that the feedback subband size of UE1 is fed back according to the size of Table 2. 10 indicates that the feedback subband of UE1 is fed back according to the size of Table 3, and 11 indicates that the feedback subband size of UE1 is fed back according to the size of Table 4.
  • Example 3 Assume that UE1 is a user of R11, and the base station side configures the non-period channel state information feedback of UE1 to be a sub-band feedback mode selected by the upper layer through high-layer signaling. At this time, the base station side can notify UE1 through another 2-bit high-level signaling.
  • the feedback subband size used For example: 00 indicates that the feedback subband of UE1 is fed back according to the size of Table 1, and 01 indicates that the feedback subband size of UE1 is fed back according to the size of Table 2. 10 indicates that the feedback subband of UE1 is fed back according to the size of Table 3, and 11 indicates that the feedback subband size of UE1 is fed back according to the size of Table 4.
  • Example 4 Assume that the UE1 is the user of the R11, and the base station side configures the non-period channel state information of the UE1 to be the subband feedback mode selected by the UE through the high layer signaling, and the base station side can notify the UE1 by using another 2 bits of high layer signaling.
  • the set of feedback subband sizes used For example, 0 indicates that the feedback subband of UE1 performs selection feedback according to the size set of Table 5 and Table 6, and 1 indicates that the feedback subband size of UE1 performs selection feedback according to the size set of Table 7 and Table 8.
  • the sub-band configuration size of the PUSCH feedback is then indicated by the 1 bit in the DCI which is the feedback in the set of the higher layer configuration.
  • the PUSCH triggers the indication signaling in the DCI to be 0.
  • the high-level configuration is 0, and the PUSCH triggers the indication signaling in the DCI to be 1, then the table 6 is used, and the high-level configuration is 1, and the PUSCH triggers the DCI.
  • the indication signaling is 0, then Table 7 is used, the upper layer configuration is 1, and the PUSCH triggers the indication signaling in the DCI to be 1, then Table 8 is used.
  • Example 5 Assume that the UE1 is the user of the R1, and the base station side configures the non-period channel state information of the UE1 to be the sub-band feedback mode of the high-layer selection through the high-layer signaling, and the base station side can notify the UE1 by using another 2-bit high-level signaling.
  • the set of feedback subband sizes used For example, 0 indicates that the feedback subband of UE1 performs selection feedback according to the size set of Table 9 and Table 10. 1 indicates that the feedback subband size of UE1 is selected and feedback according to the size set of Table 11 and Table 12.
  • the sub-band configuration size of the PUSCH feedback is then indicated by the 1 bit in the DCI which is the feedback in the set of the higher layer configuration.
  • the PUSCH triggers the indication signaling in the DCI to be 0.
  • the high-level configuration is 0, and the PUSCH triggers the indication signaling in the DCI to be 1, then the table 10 is used, and the high-level configuration is 1, and the PUSCH triggers the DCI.
  • the indication signaling is 0, then Table 11 is used, the upper layer configuration is 1, and the PUSCH triggers the indication signaling in the DCI to be 1, then Table 12 is used.
  • Example 6 Assume that UE1 is a user of R11, and the base station side configures the non-period channel state information of UE1 to be the subband feedback mode selected by the UE through high layer signaling. At this time, the base station side can pass 1 bit in the DCI that triggers the aperiodic feedback.
  • the subband configuration indicating the PUSCH feedback is which of the corresponding subband configurations in the standard. For example, if the indication signaling in the PUCH triggering DCI is 00, then the indication signaling in the DCI triggered by the PUSCH is 01. Then, in Table 6, the PUSCH triggers the indication signaling in the DCI to be 10, then the PUSCH is used to trigger the DCI.
  • the medium indication signaling is 11, then use Table 8.
  • Example 7 Assume that UE1 is a user of R11, and the base station side configures the non-period channel state information of UE1 to be a sub-band feedback mode selected by the upper layer through high-layer signaling. At this time, the base station side can pass 1 bit in the DCI that triggers the aperiodic feedback.
  • the subband configuration indicating the PUSCH feedback is which of the corresponding subband configurations in the standard. For example, if the indication signaling in the PUSCH triggering DCI is 00, then the indication signaling in the DCI triggered by the PUSCH is 01.
  • the PUSCH triggers the indication signaling in the DCI to be 10, then the PUSCH is used to trigger the DCI.
  • the medium indication signaling is 11, then Table 12 is used.
  • Example 8 Assume that the UE1 is the user of the R11, and the base station side configures the periodic channel state information feedback of the UE1 to the sub-band feedback mode through the high-layer signaling, and the UE1 is the EPDCCH UE, and the base station side can only configure the UE1 to adopt Table 3 or Table 4. Or, it can be configured as Table 3 and Table 4. Then, the base station side informs UE1 through another higher layer signaling which one of Table 3 and Table 4 is selected as the feedback subband set.
  • Example 9 Assume that UE1 is a user of R11, and the base station side configures the non-period channel state information of the UE1 to be the sub-band feedback mode selected by the UE through the high-layer signaling, and the UE1 is the EPDCCH UE. Then the UE performs feedback according to the subband size of Table 8.
  • Example 10 The UE1 is a user of the R11, and the base station side configures the non-period channel state information of the UE1 to be the sub-band feedback mode of the high-layer selection, and the UE1 is the EPDCCH UE.
  • Example 11 Assume that the UE1 is the user of the R11, and the base station side configures the non-period channel state information of the UE1 to be the sub-band feedback mode of the high-layer selection, and the UE1 is the EPDCCH UE. 11 or Table 12, or may be configured as Table 11 and Table 12, and then, in the DCI, which set of sub-band configuration sizes of the PUSCH feedback is indicated by 1 bit. The PUSCH triggers the indication signaling in the DCI to be 0.
  • the PUSCH triggers the indication signaling in the DCI to be 1, then Table 12 is used.
  • Example 12 Assuming that UE1 is a user of R11, preferably, the standard can be fixed to specify a subband size range of ⁇ 1, 2, 3, 4, 6, 8, 12, 16 ⁇ , and the base station side passes UE-Specific high layer signaling. To configure UE1 to adopt different sub-band sizes, for example, to configure UE1 to use sub-band size 2 feedback, the base station side only needs to notify UE1 of one 001. Preferably, the base station side can pass 3-bit high-level signaling. The UE is notified of the corresponding subband size.
  • Example 13 It is assumed that UE1 and UE2 are users of R11, UE1 is a non-EPDCCH user, and UE2 is an EPDCCH user.
  • the standard may configure different fixed subband size ranges for different configuration modes, for example, ⁇ 6, 8, 12, 16 ⁇ for non-EPDCCH user defined subband sets, and ⁇ subband user defined subband set for ⁇ for EPDCCH users. 1, 2, 3, 4 ⁇ .
  • the base station side configures UE1 and UE2 to use different sub-band sizes through the UE-specific high-level signaling. For example, if the UE1 needs to use the feedback of the sub-band size of 8, the base station side only needs to notify the UE1 that a 01, that is, the base station.
  • the side can notify the corresponding sub-band size of UE1 through 2-bit high-level signaling.
  • the UE2 needs to configure the feedback of the subband size to be 2, and then the base station side only needs to notify the UE2 to 01. That is, the base station side can notify the corresponding subband size of the UE2 by using 2 bits of high layer signaling.
  • Example 14 Assume that UE1 and UE2 are users of R11, UE1 is a non-EPDCCH user configured as periodic feedback, and UE2 is an EPDCCH user configured as aperiodic feedback.
  • the standard can configure different fixed subband sizes for different configuration modes.
  • the range of the fixed subband range is configured, for example, for EPDCCH configuration, periodic feedback, aperiodic feedback, UE selected feedback mode, and higher layer selected feedback mode.
  • the non-EPDCCH user defined subband set for periodic feedback is ⁇ 6, 8 ⁇
  • the EPDCCH user defined subband set for aperiodic feedback is ⁇ 3, 4 ⁇
  • the base station side passes UE-Specific High-level signaling to configure UE1 to use different sub-band sizes.
  • the UE1 uses the feedback of the sub-band size of 8, so that the base station side only needs to notify the UE1 that one is 1. That is, the base station side can notify the corresponding sub-band size of the UE1 by using 1-bit high-level signaling.
  • the UE2 uses the feedback of the sub-band size of 4, and then the base station side only needs to notify the UE 2 -1, that is, the base station side can notify the UE 2 corresponding sub-band size by using 1-bit high-level signaling.
  • Example 15 Assume that UE1 and UE2 are users of R11, UE1 is periodic feedback configured for UE selection, UE2 is periodic feedback configured for high layer selection, and the standard can configure different fixed subband size ranges for different configuration modes. For example, for the EPDCCH configuration, periodic feedback, aperiodic feedback, the UE selected feedback mode and the higher layer selected feedback mode, different fixed subband ranges are configured.
  • the periodic feedback set for the UE is defined as a subband set, 2 ⁇
  • the periodic feedback defined by the higher layer defines the subband set as ⁇ 2, 4 ⁇
  • the base station side passes the UE-Specific high layer signaling.
  • Configure UE1 to use different subband sizes For example, the UE1 uses the feedback of the subband size of 1, and the base station side only needs to notify the UE1 to 0. That is, the base station side can notify the corresponding subband size of the UE1 by using 1 bit of high layer signaling.
  • the UE2 uses the feedback of the sub-band size of 4, and then the base station side only needs to notify the UE 2 -1, that is, the base station side can notify the UE 2 corresponding sub-band size by using 1-bit high-level signaling.
  • Example 16 Assume that UE1 and UE2 are users of R11, UE1 is periodic feedback configured for UE selection, UE2 is configured for aperiodic feedback, and the standard can configure different fixed subband size ranges for different configuration modes. For example, for the EPDCCH configuration, periodic feedback, aperiodic feedback, the UE selected feedback mode and the higher layer selected feedback mode, different fixed subband ranges are configured.
  • the periodic feedback set for the UE is defined as a subband set, 2 ⁇ , and for the aperiodic feedback, the set of subbands is ⁇ 2, 4 ⁇ , and the base station side configures UE1 by using UE-Specific high layer signaling.
  • Use different sub-band sizes For example, the UE1 uses the feedback of the subband size of 1, and the base station side only needs to notify the UE1 to 0. That is, the base station side can notify the corresponding subband size of the UE1 by using 1 bit of high layer signaling.
  • the base station side uses feedback with a subband size of 4, then the base station side only needs It is sufficient to notify the UE 2 that the base station side can notify the corresponding sub-band size of the UE2 by using 1-bit high-level signaling.
  • Example 17 Assuming that UE1 is a user of R11, the standard can fix the range of the specified subband size ⁇ 1 / 2, 1 / 3, 1, 2, 3, 4 ⁇ , and the base station side configures UE1 by UE-Specific high layer signaling. Different subband sizes. For example, if the UE1 needs to use the sub-band size to be half of the sub-band size of the original R10, the base station side only needs to notify the UE1 that a 0 is needed.
  • the UE1 needs to be configured to use the sub-band size as twice the size of the original R10 sub-band. Time feedback, then the base station side only needs to notify the UE 1 - 3, that is, the base station side can notify the UE of the corresponding sub-band size through 3-bit high-level signaling.
  • the UE determines the corresponding subband size in R10 according to the system bandwidth and the feedback manner, and then determines the actual feedback subband size according to the subband configuration parameters configured by the base station side high layer signaling.
  • the feedback scheme of the channel state information implements the following technical effects: determining the subband size required for the terminal side feedback channel state information by using the base station side, and selecting the selected The sub-band size is sent to the terminal side to implement the configuration of the sub-band size of the terminal side, which solves the technical problem that the channel frequency selection characteristic is reduced due to the inability to configure the sub-band size in the prior art, and the channel selection characteristic is enhanced.
  • the base station side ensures that the overhead of the uplink resource is reduced in different scenarios or in the configuration terminal side mode to obtain accurate channel state information, thereby reducing resource consumption.
  • modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

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  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
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Abstract

La présente invention se rapporte à un procédé et à un dispositif adaptés pour retourner par rétroaction des données d'état de canal. Le procédé selon l'invention comprend les étapes suivantes : un dispositif sur le côté station de base sélectionne la taille d'une sous-bande requise par un dispositif sur le côté terminal pour retourner par rétroaction des données d'état de canal ; et le dispositif sur le côté station de base transmet la taille de la sous-bande sélectionnée, au dispositif sur le côté terminal, dans le but de commander au dispositif sur le côté terminal de transférer par rétroaction les ressources des données d'état de canal, sur la base de la taille de la sous-bande. La présente invention résout le problème technique lié, dans l'état de la technique, au fait que la caractéristique de sélection en fréquence d'un canal est réduite car la taille de la sous-bande ne peut pas être configurée. Par voie de conséquence, la présente invention permet : d'améliorer la caractéristique de sélection en fréquence d'un canal ; de garantir que le dispositif sur le côté station de base pourra réduire la consommation des ressources dans le sens amont dans différents scénarios ou dans un mode configuré sur le côté terminal, cela dans le but d'obtenir des données d'état de canal précises ; et de réduire également la consommation de ressources.
PCT/CN2012/086878 2011-12-23 2012-12-18 Procédé et dispositif pour retourner par rétroaction des données d'état de canal WO2013091535A1 (fr)

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