WO2013020475A1 - 信道状态信息反馈指示及反馈方法和设备 - Google Patents

信道状态信息反馈指示及反馈方法和设备 Download PDF

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Publication number
WO2013020475A1
WO2013020475A1 PCT/CN2012/079465 CN2012079465W WO2013020475A1 WO 2013020475 A1 WO2013020475 A1 WO 2013020475A1 CN 2012079465 W CN2012079465 W CN 2012079465W WO 2013020475 A1 WO2013020475 A1 WO 2013020475A1
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WO
WIPO (PCT)
Prior art keywords
information
transmission point
measurement
terminal
base station
Prior art date
Application number
PCT/CN2012/079465
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English (en)
French (fr)
Inventor
陈文洪
高秋彬
张然然
Original Assignee
电信科学技术研究院
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.)
Filing date
Publication date
Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Priority to US14/235,453 priority Critical patent/US20150071187A1/en
Priority to EP12822567.9A priority patent/EP2741440A1/en
Priority to JP2014523186A priority patent/JP2014524679A/ja
Priority to KR1020147006049A priority patent/KR20140045575A/ko
Publication of WO2013020475A1 publication Critical patent/WO2013020475A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/0626Channel coefficients, e.g. channel state information [CSI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027Scheduling of signalling, e.g. occurrence thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0076Distributed coding, e.g. network coding, involving channel coding

Definitions

  • the priority of the Chinese Patent Application for "Channel State Information Feedback Indication and Feedback Method and Apparatus” is hereby incorporated by reference in its entirety.
  • the present invention relates to the field of wireless communications, and in particular, to a channel state information feedback indication method and apparatus. Background technique
  • CoMP Coordinated Multipoint Transmission/Reception
  • multiple transmission points are base stations of different cells, or multiple RRHs (Remote Radio Heads) controlled by the same cell base station.
  • RRHs Remote Radio Heads
  • the downlink multi-point coordinated transmission technology scheme is mainly divided into two categories: CS/CB (cooperative scheduling/beamforming) and Joint processing.
  • Collaborative scheduling is to avoid or reduce the interference between each other through the coordination of time, frequency and space resources between transmission points.
  • the interference of the small interval is the main factor that restricts the performance of the UE (User Equipment). Therefore, cooperative scheduling can improve the performance of the cell edge UE by reducing the interference between cells.
  • FIG. 1 through coordinated scheduling of three transmission points, three UEs that may be mutually interfered are scheduled to mutually orthogonal resources, thereby effectively avoiding interference between transmission points.
  • Collaborative beamforming schedules the shaping directions of multiple users in a coordinated cell, so that the beam directions of users of different cells are orthogonal to each other, thereby reducing the mutual interference.
  • the joint processing scheme includes dynamic transmission point switching and joint transmission.
  • the base station can dynamically switch the transmission point that sends a signal to the user, so that the optimal transmission point is transmitted every time.
  • the base station needs to obtain channel information of multiple selectable cells through a feedback channel, or obtain channel information of an optimal transmission point.
  • multiple transmission points simultaneously transmit data to the UE to enhance the UE receiving signals.
  • three transmission points transmit data to one UE on the same resource, and the UE simultaneously receives signals of multiple cells.
  • the useful signal superposition from multiple cells can boost the UE.
  • the received signal shield reduces the interference experienced by the UE, thereby improving system performance.
  • Such a scheme requires the UE to feed back channel information of multiple cells, and even relative channel information between cells, thereby ensuring that multiple cells can jointly perform scheduling, precoding, and data transmission.
  • the UE estimates the channel information of the base station to the UE according to the CSI-RS (Channel State Information Reference Signal) configured by the base station, and calculates the CQI (Channel Quality). Indicator, channel shield indication) is fed back to the base station.
  • the PMI Precoding Matrix Indicator
  • RI Rank Indication
  • the base station can trigger the UE to perform aperiodic CSI (Channel State Information) through DCI (downlink control information).
  • the UE After receiving the triggering command, the UE feeds back the downlink RI/PMI/CQI according to a specific feedback mode through a PUSCH (Physical Uplink Shared Channel).
  • PUSCH Physical Uplink Shared Channel
  • the base station can only obtain the channel information of a single cell (ie, the serving cell of the UE) through the existing PUSCH, and cannot obtain the channel information of other coordinated cells, which is difficult to perform cooperative scheduling or cooperative transmission.
  • a channel state information feedback indication method and device which are used to implement a scheme in which a base station indicates to a terminal a transmission point measurement information set and/or a measurement set for aperiodic CSI feedback.
  • a channel state information CSI feedback indication method includes:
  • the base station determines, according to a result of joint scheduling of multiple transmission points, a measurement set corresponding to the transmission point measurement information set by the terminal for performing aperiodic CSI feedback and/or a measurement set corresponding to the downlink carrier set;
  • the base station transmits, to the terminal, indication information for performing aperiodic CSI feedback for the determined transmission point measurement information set and/or the measurement set corresponding to the determined downlink carrier set.
  • the base station comprising:
  • a determining unit configured to determine, according to a result of joint scheduling of multiple transmission points, a measurement set corresponding to the transmission point measurement information set by the terminal for performing aperiodic CSI feedback and/or a measurement set corresponding to the downlink carrier set;
  • a sending unit configured to send, to the terminal, indication information for performing aperiodic CSI feedback on the determined measurement point measurement information set and/or the measurement set corresponding to the determined downlink carrier set.
  • the base station determines, according to the result of the joint scheduling of the multiple transmission points, the measurement point measurement information set and/or the measurement set corresponding to the downlink carrier set for the terminal to perform the aperiodic CSI feedback, and sends the measurement for the determined transmission point to the terminal.
  • the set of measurements corresponding to the set of information and/or the determined set of downlink carriers is aperiodic
  • the indication information fed back by the CSI thereby implementing a scheme in which the base station indicates to the terminal the transmission point measurement information set and/or the measurement set for which the aperiodic CSI feedback is performed.
  • the embodiment of the present invention provides a channel state information feedback method and device, which is used to implement a scheme for aperiodic CSI feedback for a transmission point measurement information set and/or a measurement set according to an indication of a base station.
  • the method includes:
  • the terminal feeds back, according to the indication information, the CSI corresponding to the corresponding transmission point measurement information set and/or the measurement set corresponding to the downlink carrier set to the base station.
  • a terminal comprising:
  • a receiving unit configured to receive indication information that is sent by the base station to perform aperiodic CSI feedback on the measurement set corresponding to the transmission point measurement information and/or the downlink carrier set;
  • a feedback unit configured to feed back, according to the indication information, a CSI corresponding to the corresponding transmission point measurement information set and/or the measurement set corresponding to the downlink carrier set to the base station.
  • the terminal receives the indication information of the transmission point measurement information set and/or the measurement set corresponding to the downlink carrier set, and performs the aperiodic CSI feedback, and feeds back the corresponding transmission point measurement information set to the base station according to the indication information. And the CSI corresponding to the measurement set corresponding to the downlink carrier set, thereby implementing a scheme for the terminal to perform aperiodic CSI feedback for the transmission point measurement information set and/or the measurement set according to the indication of the base station.
  • FIG. 1 is a schematic diagram of coordinated scheduling of transmission points in the prior art
  • FIG. 3 is a schematic flowchart of a method according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of another method according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a device according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of another device according to an embodiment of the present invention.
  • a base station is required to configure a measurement set to a terminal in advance by using high layer signaling or the like, and the measurement set is a set including one or more transmission point measurement information, and each transmission point measurement information may include one or more downlinks.
  • the area identifier (ID) information, the configuration information of the downlink reference signal may be configuration information of the CSI-RS, and may include carrier information where the downlink reference signal is located.
  • the terminal may find the configuration information of the corresponding downlink reference signal in the local database according to the index of the configuration information or the cell ID information.
  • the measurement set referred to in the present invention generally refers to a set of all transmission point measurement information that the current UE needs to measure.
  • one measurement set may be configured for all downlink carriers, and each transmission point measurement information in the measurement set includes configuration information of downlink reference signals of all downlink carriers, or an index of the configuration information, or a corresponding transmission point
  • the cell ID information may be configured separately for each downlink carrier set, and each of the measurement point measurement information in each measurement set includes configuration information of a downlink reference signal of each downlink carrier in the corresponding downlink carrier set, or The index of the configuration information.
  • the set of transmission point measurement information is a set containing measurement information of some or all of the transmission points in the measurement set.
  • the set of transmission point measurement information corresponding to the measurement set ie, the set of transmission point measurement information in the measurement set
  • the measurement set may have one or more, for example, the measurement set includes two transmission point measurements of A and B.
  • the downlink carrier set is a set of one or more downlink carrier information. For example, if the system aggregates two downlink carriers a and b, there may be a maximum of three downlink carrier sets: ⁇ a ⁇ , ⁇ a, b ⁇ , ⁇ b ⁇ .
  • the embodiment of the present invention provides a CSI feedback indication method, in order to implement a scheme for a base station to indicate to a terminal, a set of measurement information and/or a measurement set for aperiodic CSI feedback.
  • the CSI feedback indication method includes the following steps:
  • Step 30 The base station determines, according to a result of joint scheduling of multiple transmission points, a measurement set corresponding to the transmission point measurement information set by the terminal for performing aperiodic CSI feedback and/or a measurement set corresponding to the downlink carrier set.
  • Step 31 The base station sends, to the terminal, indication information for performing aperiodic CSI feedback on the determined measurement point measurement information set and/or the measurement set corresponding to the determined downlink carrier set.
  • step 31 can be implemented in one of the following three ways:
  • the base station sends, to the terminal, indication information for aperiodic CSI feedback for the transmission point measurement information set in the pre-configured measurement set, where the transmission point measurement information set is the transmission point measurement information set determined in step 31, the transmission The point measurement information set includes some or all of the transmission point measurement information in the measurement set;
  • Manner 2 The base station sends, to the terminal, indication information for performing aperiodic CSI feedback on the measurement set corresponding to the determined downlink carrier set.
  • the base station sends, to the terminal, an indication of aperiodic CSI feedback for the transmission point measurement information set in the measurement set corresponding to the determined downlink carrier set, where the transmission point measurement information set is the transmission point measurement information set determined in step 31.
  • the transmission point measurement information set includes a determined downlink carrier set corresponding Some or all of the transmission point measurement information in the measurement set.
  • Mode one can be applied to the case where one measurement set is configured for all downlink carriers.
  • Mode 1 and Mode 3 may be applicable to a case where one measurement set is separately configured for each downlink carrier set.
  • the indication information may occupy 1 bit or 2 bits or 3 bits.
  • the base station sends the 1-bit indication information to the terminal to instruct the terminal to perform aperiodic CSI feedback on the transmission point measurement information set including all the transmission point measurement information in the pre-configured measurement set; or
  • the base station sends 1-bit indication information to the terminal to instruct the terminal to perform aperiodic CSI feedback for the transmission point measurement information set including the first transmission point measurement information in the pre-configured measurement set; or, the base station sends 2 bits to the terminal.
  • 3-bit indication information to indicate that the terminal performs aperiodic CSI feedback for the first transmission point test information in the measurement set or the transmission point measurement information set in the measurement set, where the transmission point measurement information set includes Some or all of the measurement points in the measurement set measure information.
  • the base station sends the 2-bit or 3-bit indication information to the terminal to instruct the terminal to perform aperiodic CSI feedback on the current carrier where the indication information is located or the measurement set corresponding to the determined downlink carrier set.
  • the base station sends 2 bits or 3 bits or 4 bits of indication information to the terminal to instruct the terminal to perform aperiodic CSI feedback on the transmission point measurement information set in the measurement set corresponding to the determined downlink carrier set, where the transmission point measurement
  • the information set includes some or all of the transmission point measurement information in the measurement set corresponding to the determined downlink carrier set.
  • the base station needs to set the transmission point measurement information set in each measurement set, the measurement set corresponding to each downlink carrier set, and the transmission point in the measurement set corresponding to each downlink carrier set.
  • the information of the measurement information set is notified to the terminal through high layer signaling.
  • the terminal can learn the transmission point measurement information included in each measurement point measurement information set, the downlink carrier set corresponding to each measurement set, and the like according to the information.
  • the base station may send the indication information to the terminal by using DCI signaling on a PDCCH (Physical Downlink Control Channel).
  • PDCCH Physical Downlink Control Channel
  • the embodiment of the present invention provides a CSI feedback method.
  • the CSI feedback method provided by the embodiment of the present invention includes the following steps:
  • Step 40 The terminal receives the indication information that is sent by the base station and sends the measurement set corresponding to the transmission point measurement information set and/or the downlink carrier set to perform aperiodic CSI feedback.
  • Step 41 The terminal feeds back, according to the indication information, a CSI corresponding to the measurement set corresponding to the transmission point measurement information and/or the measurement set corresponding to the downlink carrier set to the base station.
  • the CSI corresponding to the transmission point measurement information set refers to the information included in the measurement set according to the transmission point.
  • the CSI corresponding to the measurement set corresponding to the downlink carrier set refers to the CSI measured according to each transmission point measurement information included in the measurement set.
  • the CSI corresponding to the measurement set corresponding to the transmission point measurement information set and the downlink carrier set refers to the CSI measured according to each transmission point measurement information included in the measurement point measurement information measurement set in the measurement set corresponding to the downlink carrier set.
  • the terminal may receive indication information that is sent by the base station to perform aperiodic CSI feedback on the transmission point measurement information set in the pre-configured measurement set, where the measurement point measurement information set includes the measurement set. Part or all of the transmission point measurement information;
  • step 41 the terminal feeds back, to the base station, the CSI corresponding to the transmission point measurement information set indicated by the indication information.
  • the terminal may receive indication information that is sent by the base station to perform aperiodic CSI feedback on the measurement set corresponding to the determined downlink carrier set.
  • step 41 the terminal feeds back, to the base station, the measured set corresponding to the downlink carrier set, and the corresponding CSI.
  • the terminal receives indication information of the transmission point measurement information set in the measurement set corresponding to the determined downlink carrier set sent by the base station to perform aperiodic CSI feedback, where the transmission point measurement information set includes Part or all of the transmission point measurement information in the measurement set corresponding to the determined downlink carrier set.
  • the terminal feeds back, to the base station, the transmission point measurement information set in the measurement set corresponding to the indicated downlink carrier set, and the corresponding CSI; the transmission point measurement information set includes part or all of the transmission in the measurement set. Point measurement information.
  • the indication information may occupy 1 bit or 2 bits or 3 bits, and the following examples are as follows:
  • the terminal feeds back to the base station a transmission point measurement information set including all the transmission point measurement information in the pre-configured measurement set, and the corresponding CSI; or
  • the base station transmits a transmission point measurement information set including the first transmission point measurement information in the pre-configured measurement set, and the corresponding CSI;
  • the terminal feeds back to the base station the first transmission point test information in the indicated measurement set or the transmission point measurement information set in the measurement set, and the corresponding CSI
  • the transmission point measurement information set includes some or all of the transmission point measurement information in the measurement set.
  • the terminal feeds back to the base station the CSI corresponding to the measurement set corresponding to the current carrier or the indicated downlink carrier set where the information is located;
  • the terminal feeds back, to the base station, the transmission point measurement information set in the measurement set corresponding to the indicated downlink carrier set, and the corresponding CSI; the transmission point measurement information set Contains some or all of the transmission point measurement information in the measurement set. Further, before the terminal receives the indication information, the terminal receives a transmission point measurement information set in each measurement set sent by the base station by using the high layer signaling, a measurement set corresponding to each downlink carrier set, and a measurement set corresponding to each downlink carrier set. The transmission point in the measurement information of the information set.
  • the terminal may receive the indication information by using DCI signaling on the PDCCH.
  • the base station determines, according to the result of the joint scheduling of the multiple transmission points, the measurement point measurement information set and/or the measurement set corresponding to the downlink carrier set for the aperiodic CSI feedback, and sends the measurement information set for the determined transmission point to the terminal. / or the indication set corresponding to the determined downlink carrier set performs indication information of the aperiodic CSI feedback.
  • the terminal receives the indication information of the transmission point measurement information set and/or the measurement set corresponding to the downlink carrier set sent by the base station to perform aperiodic CSI feedback; and according to the indication information, feed back the corresponding transmission point measurement information set and/or to the base station.
  • the CSI corresponding to the measurement set corresponding to the downlink carrier set is
  • the base station instructs the UE to perform aperiodic CSI feedback for the determined measurement set of the transmission point and/or the measurement set corresponding to the determined downlink carrier set by DCI signaling according to the result of the joint scheduling of the multiple transmission points. Specifically, the base station determines the number of bits used for the DCI signaling according to at least one of the system configuration of the UE, the result of the joint scheduling, and the content of the measurement set, and the number of bits may be 1-3 bits.
  • Case 1 configuring one measurement set for all downlink carriers, and each transmission point measurement information in the measurement set includes configuration information of downlink reference signals of all downlink carriers;
  • the 1-bit DCI signaling indication is used; the 2-bit DCI signaling may also be used to indicate the measurement information of some or all of the downlink carriers included in the measurement information of the transmission point.
  • Aperiodic CSI feedback is performed, for example, indicating that the measurement information of the primary carrier or the non-primary carrier included in the measurement information of the transmission point is subjected to aperiodic CSI feedback.
  • the measurement set contains multiple transmission point measurement information, it is indicated by 1 bit or 2 or 3 bits of DCI signaling.
  • Case 2 A measurement set is respectively configured for each downlink carrier set, and each transmission point measurement information in each measurement set includes configuration information of downlink reference signals of respective downlink carriers in the corresponding downlink carrier set.
  • the UE When the UE is configured with only one downlink carrier, it is indicated by 1 bit or 2 bits of DCI signaling.
  • the UE uses 1 bit or 2 bits or 3 bits of DCI signaling indication.
  • the terminal After receiving the DCI signaling sent by the base station, the terminal feeds back the CSI corresponding to the measurement set corresponding to the transmission point and/or the measurement set corresponding to the downlink carrier set according to the information included in the signaling.
  • the measurement sets described above all include the primary transmission point. If the measurement set defined in the standard may not include the primary transmission point, the measurement set referred to in the present invention is the measurement set and the primary transmission point. Merge collections.
  • the transmission point measurement information mentioned above is generally the configuration information of the downlink reference signal corresponding to the transmission point, and the common one is the CSI-RS information corresponding to the transmission point.
  • Embodiment 1 Corresponding to the above case 1.
  • the 1-bit DCI signaling is used to instruct the terminal to perform aperiodic CSI feedback for the transmission point measurement information set including one transmission point measurement information in the measurement set; or
  • the bit DCI signaling indicates that the terminal performs aperiodic CSI feedback for measurement information of some or all of the downlink carriers in the transmission point measurement information.
  • Method 1 using 1-bit DCI signaling to instruct the terminal to perform aperiodic CSI feedback on a set of transmission point measurement information including measurement information of all transmission points in the measurement set;
  • Method 2 using 2-bit DCI signaling, instructing the terminal to perform aperiodic CSI feedback on the transmission point measurement information set in the measurement set, as follows:
  • the CSK corresponding to all non-primary transmission point measurement information in the feedback measurement set is for the inclusion of the measurement set except the main transmission point.
  • the CSK corresponding to all the primary transmission point measurement information in the feedback measurement set is measured for all transmission points in the included measurement set.
  • the transmission point of the information measures the information set for aperiodic CSI feedback
  • the corresponding CSI method 3 is set, and the 3-bit DCI signaling is used to instruct the terminal to perform aperiodic CSI feedback on the transmission point measurement information set in the measurement set, as follows:
  • each downlink carrier set includes one downlink carrier.
  • the set may use 1-bit DCI signaling to instruct the terminal to perform aperiodic CSI feedback for the measurement set; or
  • the 2-bit DCI signaling is used to instruct the terminal to perform aperiodic CSI feedback for the set of transmission point measurement information in the measurement set, for example:
  • each downlink carrier set corresponds to one measurement set.
  • the following methods can be used:
  • Method 1 using 1-bit DCI signaling to instruct the terminal to perform aperiodic CSI feedback for the measurement set corresponding to all downlink carrier sets;
  • the 2-bit DCI signaling is used to instruct the terminal to perform aperiodic CSI feedback on the measurement set corresponding to the partial downlink carrier set, for example:
  • a set of measurements should be taken for aperiodic CSI feedback
  • the CSI that feeds back a certain service carrier refers to the CSI corresponding to all the measurement information of the transmission points in the measurement set corresponding to a certain service carrier.
  • the CSI that feeds back a certain service carrier refers to the CSI corresponding to all the measurement information of the transmission points in the measurement set of a certain service carrier.
  • an embodiment of the present invention provides a base station, where the base station includes: a determining unit 50, configured to determine, according to a result of the joint scheduling of the multiple transmission points, a measurement set corresponding to the transmission point measurement information and/or a downlink carrier set for the terminal to perform aperiodic CSI feedback;
  • the sending unit 51 is configured to send, to the terminal, indication information for performing aperiodic CSI feedback on the determined measurement point measurement information set and/or the measurement set corresponding to the determined downlink carrier set.
  • the sending unit 51 includes one or any combination of a first indicating unit, a second indicating unit, and a third indicating unit, where:
  • the first indication unit is configured to send, to the terminal, indication information for performing aperiodic CSI feedback on a transmission point measurement information set in a pre-configured measurement set, where the transmission point measurement information set includes a part of the measurement set or All transmission point measurement information;
  • the second indication unit is configured to send, to the terminal, indication information for performing aperiodic CSI feedback on the measurement set corresponding to the determined downlink carrier set;
  • the third indication unit is configured to send, to the terminal, indication information for performing aperiodic CSI feedback on the transmission point measurement information set in the measurement set corresponding to the determined downlink carrier set, where the transmission point measurement information set includes the determined downlink carrier Collect some or all of the transmission point measurement information in the corresponding measurement set.
  • the indication information occupies 1 bit or 2 bits or 3 bits.
  • the first indication unit is configured to:
  • the measurement information set includes some or all of the transmission point measurement information in the measurement set.
  • the second indication unit is configured to:
  • the terminal sends two or three bits of indication information to the terminal to instruct the terminal to perform aperiodic CSI feedback on the current carrier where the indication information is located or the measurement set corresponding to the determined downlink carrier set.
  • the third indication unit is configured to:
  • the base station also includes:
  • the notification unit 52 is configured to: before transmitting the indication information to the terminal, transmit the transmission point in each measurement set
  • the measurement information set, the measurement set corresponding to each downlink carrier set, and the information of the transmission point measurement information set in the measurement set corresponding to each downlink carrier set are notified to the terminal by higher layer signaling.
  • the sending unit 51 is configured to:
  • the transmission point measurement information is: configuration information of a downlink reference signal corresponding to the transmission point, or an index of the configuration information, or a cell ID information corresponding to the transmission point.
  • an embodiment of the present invention provides a terminal, where the terminal includes:
  • the receiving unit 60 is configured to receive, by the base station, indication information for performing aperiodic CSI feedback on the measurement set corresponding to the transmission point measurement information and/or the downlink carrier set;
  • the feedback unit 61 is configured to feed back, according to the indication information, a CSI corresponding to the corresponding transmission point measurement information set and/or the measurement set corresponding to the downlink carrier set to the base station.
  • the receiving unit 60 is configured to:
  • the indication information occupies 1 bit or 2 bits or 3 bits.
  • the feedback unit 61 is used to:
  • the base station transmits a transmission point measurement information set including all the transmission point measurement information in the pre-configured measurement set, and the corresponding CSI; or
  • the base station transmits a transmission point measurement information set including the first transmission point measurement information in the pre-configured measurement set, and the corresponding CSI;
  • the transmission point measurement information set includes some or all of the transmission point measurement information in the measurement set; or, if the 2-bit or 3-bit indication information is received, the current carrier or the indicated downlink carrier where the indication information is located is fed back to the base station.
  • the indicated downlink is fed back to the base station.
  • the set of transmission point measurement information in the measurement set corresponding to the wave set, the corresponding CSI; the transmission point measurement information set includes some or all of the transmission point measurement information in the measurement set.
  • the receiving unit 60 is further configured to:
  • the receiving unit 60 is configured to:
  • the indication information is received through downlink control information DCI signaling on the physical downlink control channel PDCCH.
  • the transmission point measurement information is: configuration information of a downlink reference signal corresponding to the transmission point, or an index of the configuration information, or a cell ID information corresponding to the transmission point.
  • the beneficial effects of the present invention include:
  • the base station determines, according to the result of the joint scheduling of the multiple transmission points, the measurement point measurement information set and/or the measurement set corresponding to the downlink carrier set for the terminal to perform the aperiodic CSI feedback, and sends the measurement set corresponding to the downlink carrier set to the terminal. Determining the transmission point measurement information set and/or the measurement set corresponding to the determined downlink carrier set to perform indication information of the aperiodic CSI feedback, thereby implementing the transmission point measurement information set for the base station to indicate the aperiodic CSI feedback to the terminal and/or Or measure the set of plans.
  • the terminal receives the indication information of the transmission point measurement information set and/or the measurement set corresponding to the downlink carrier set sent by the base station to perform aperiodic CSI feedback, and feeds back the corresponding transmission point measurement information set and/or downlink to the base station according to the indication information.
  • the CSI corresponding to the measurement set corresponding to the carrier set thereby implementing a scheme for the terminal to perform aperiodic CSI feedback for the transmission point measurement information set and/or the measurement set according to the indication of the base station.
  • the base station can instruct the terminal to perform aperiodic CSI feedback on the transmission point measurement information set and/or the measurement set, and the terminal performs CSI feedback according to the indication of the base station, so that the base station can obtain the CSI required for the CoMP transmission, and thus can support various types.
  • the CoMP transmission scheme results in significant throughput gain.
  • the present invention can simultaneously support feedback of CSI required for single point transmission and CoMP transmission.
  • the present invention is backward compatible and can be compatible with existing aperiodic CSI feedback methods.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

公开了一种信道状态信息CSI反馈指示及反馈方法和设备,涉及无线通信技术领域,用于实现终端根据基站的指示针对输点测量信息集合和/或测量集合进行非周期CSI反馈的方案。本发明中,基站根据多传输点联合调度的结果,确定终端进行非周期CSI反馈所针对的传输点测量信息集合和/或下行载波集合对应的测量集合;基站向终端发送针对确定的传输点测量信息集合和/或确定的下行载波集合对应的测量集合进行非周期CSI反馈的指示信息。终端根据指示信息进行非周期CSI反馈。采用本发明,终端能够根据基站的指示针对输点测量信息集合和/或测量集合进行非周期CSI反馈。

Description

信道状态信息反馈指示及反馈方法和设备 本申请要求在 2011年 8月 5日提交中国专利局、申请号为 201110224320.1发明名称为
"信道状态信息反馈指示及反馈方法和设备"的中国专利申请的优先权, 其全部内容通过 引用结合在本申请中。 技术领域 本发明涉及无线通信领域, 尤其涉及一种信道状态信息反馈指示方法和设备。 背景技术
CoMP ( Coordinated Multipoint Transmission/Reception, 多点协同传输 )技术是指 地理位置上分离的多个传输点之间的协作。一般来说,多个传输点是不同小区的基站, 或者同一个小区基站控制的多个 RRH ( Remote Radio Head射频拉远单元)。 通过多 个传输点之间的协作传输, 可以有效的降低不同传输点之间的千扰, 提高用户特别是 小区边缘用户的吞吐量。 下行多点协同传输技术方案主要分为两类: CS/CB ( cooperative scheduling/beamforming , 协同调度 /波束赋形 )和 Joint processing (联合 处理)。
协同调度是通过传输点之间的时间、 频率和空间资源的协调, 避免或者降低相互 之间的千扰。 小区间的千扰是制约小区边缘 UE ( User Equipment , 用户终端)性能 的主要因素, 因此协同调度通过降低小区间的千扰, 可以提高小区边缘 UE的性能。 如图 1所示, 通过三个传输点的协同调度, 将可能会相互千扰的三个 UE调度了到相 互正交的资源上, 有效的避免了传输点之间的千扰。 协同波束赋形通过对协作小区内 多个用户的赋形方向进行调度, 使不同小区用户的波束方向相互正交, 从而降低相互 之间的千扰。 类似于单小区的 MU-MIMO ( Multiple-user MIMO, 多用户多输入输出 ) 传输, 协同波束赋形主要通过发送端的千扰抑制处理来实现。 因此, 为了抑制本用户 的传输对其他用户传输的千扰, 需要在基站端获得协作小区的下行信道信息。
联合处理方案包括动态传输点切换和联合发送两种方式。 动态传输点切换中, 基 站可以动态的切换向用户发送信号的传输点, 从而每次选择最优的传输点传输数据。 为了实现动态的传输点切换, 基站需要通过反馈信道获得多个可选小区的信道信息, 或者获得最优传输点的信道信息。 联合发送方案中多个传输点同时向 UE发送数据 , 以增强 UE接收信号。如图 2所示, 三个传输点在相同的资源上向一个 UE发送数据, UE 同时接收多个小区的信号。 一方面, 来自多个小区的有用信号叠加可以提升 UE 接收的信号盾量, 另一方面, 降低了 UE受到的千扰, 从而提高系统性能。 这种方案 要求 UE反馈多个小区的信道信息, 甚至还要小区间的相对信道信息, 从而保证多个 小区可以联合进行调度、 预编码和数据发送。
在长期演进升级 (LTE-A ) 系统中, UE 根据基站配置的 CSI-RS ( Channel State Information Reference Signal, 信道状态信息测量参考信号 )估计出基站到 UE的信道 信息, 并计算出 CQI ( Channel Quality Indicator, 信道盾量指示)反馈到基站, 与 CQI 一同反馈的可能还有 PMI ( Precoding Matrix Indicator, 预编码矩阵索引)和 RI ( Rank Indication, 秩指示)。 基站可以通过 DCI ( Downlink Control Information, 下行控制信 息 )触发 UE进行非周期 CSI ( Channel State Information;信道状态信息)
的上报, UE接收到触发指令后, 通过 PUSCH ( Physical Uplink Shared Channel, 物理 上行共享信道)根据特定的反馈模式反馈下行的 RI/PMI/CQI。 此时如果小区配置了 多个下行载波, 还需要在触发指令中指示反馈哪个载波的信道信息。
在实现本发明的过程中, 发明人发现现有技术中存在以下技术问题:
现有技术中, 通过现有的 PUSCH, 基站只能获得单小区 (即 UE的服务小区) 的信道信息,并不能获得其他协作小区的信道信息,难以进行协同调度或者协同传输。 发明内容 本发明实施例提供一种信道状态信息反馈指示方法和设备,用于实现基站向终端 指示进行非周期 CSI反馈所针对的输点测量信息集合和 /或测量集合的方案。
一种信道状态信息 CSI反馈指示方法, 该方法包括:
基站根据多传输点联合调度的结果, 确定终端进行非周期 CSI反馈所针对的传 输点测量信息集合和 /或下行载波集合对应的测量集合;
基站向终端发送针对确定的传输点测量信息集合和 /或确定的下行载波集合对应 的测量集合进行非周期 CSI反馈的指示信息。
—种基站, 该基站包括:
确定单元, 用于根据多传输点联合调度的结果, 确定终端进行非周期 CSI反馈 所针对的传输点测量信息集合和 /或下行载波集合对应的测量集合;
发送单元, 用于向终端发送针对确定的传输点测量信息集合和 /或确定的下行载 波集合对应的测量集合进行非周期 CSI反馈的指示信息。
本方案中, 基站根据多传输点联合调度的结果, 确定终端进行非周期 CSI反馈 所针对的传输点测量信息集合和 /或下行载波集合对应的测量集合,并向终端发送针对 确定的传输点测量信息集合和 /或确定的下行载波集合对应的测量集合进行非周期 CSI反馈的指示信息, 从而实现了基站向终端指示进行非周期 CSI反馈所针对的输点 测量信息集合和 /或测量集合的方案。
本发明实施例提供一种信道状态信息反馈方法和设备,用于实现终端根据基站的 指示针对传输点测量信息集合和 /或测量集合进行非周期 CSI反馈的方案。
—种信道状态信息 CSI反馈方法, 该方法包括:
终端接收基站发送的针对传输点测量信息集合和 /或下行载波集合对应的测量集 合进行非周期 CSI反馈的指示信息;
终端根据所述指示信息, 向基站反馈相应传输点测量信息集合和 /或下行载波集 合对应的测量集合所对应的 CSI。
一种终端, 该终端包括:
接收单元, 用于接收基站发送的针对传输点测量信息集合和 /或下行载波集合对 应的测量集合进行非周期 CSI反馈的指示信息;
反馈单元, 用于根据所述指示信息, 向基站反馈相应传输点测量信息集合和 /或 下行载波集合对应的测量集合所对应的 CSI。
本方案中,终端接收基站发送的针对传输点测量信息集合和 /或下行载波集合对应 的测量集合进行非周期 CSI反馈的指示信息, 并根据所述指示信息, 向基站反馈相应 传输点测量信息集合和 /或下行载波集合对应的测量集合所对应的 CSI,从而实现了终 端根据基站的指示针对传输点测量信息集合和 /或测量集合进行非周期 CSI反馈的方 案。 附图说明 图 1为现有技术中的传输点协同调度示意图;
图 2为现有技术中的传输点联合发送示意图;
图 3为本发明实施例提供的方法流程示意图;
图 4为本发明实施例提供的另一方法示意图;
图 5为本发明实施例提供的设备结构示意图;
图 6为本发明实施例提供的另一设备结构示意图。 具体实施方式 本发明中, 需要基站预先通过高层信令等将测量集合配置给终端, 测量集合是包 含一个或多个传输点测量信息的集合,每个传输点测量信息可以包含一个或者多个下 行载波的下行参考信号的配置信息, 或者该配置信息的索引, 或者传输点所对应的小 区标识(ID )信息, 该下行参考信号的配置信息可以是 CSI-RS的配置信息, 也可以 包含下行参考信号所在的载波信息等。 终端可以根据配置信息的索引或小区 ID信息 在本地数据库中查找到对应的下行参考信号的配置信息。 本发明中所说的测量集合, 一般指当前 UE需要测量的所有传输点测量信息组成的集合。
在配置测量集合时, 可以针对所有下行载波配置一个测量集合, 该测量集合中的 各个传输点测量信息包含所有下行载波的下行参考信号的配置信息,或者该配置信息 的索引, 或者传输点所对应的小区 ID信息; 也可以针对每个下行载波集合分别配置 一个测量集合,每个测量集合中的各个传输点测量信息包含对应下行载波集合中的各 下行载波的下行参考信号的配置信息, 或者该配置信息的索引。
传输点测量信息集合是包含测量集合中的部分或全部传输点测量信息的集合。对 于一个配置的测量集合, 该测量集合对应的传输点测量信息集合(即该测量集合中的 传输点测量信息集合)可以有一个或多个, 例如, 测量集合包含 A、 B两个传输点测 量信息, 则该测量集合对应的传输点测量信息集合最多可以有三个: {A}、 {A、 B}、 {B}。
下行载波集合是包含一个或多个下行载波信息的集合, 例如, 若系统聚合了 a、 b 两个下行载波, 则最多可以有三个下行载波集合: {a}、 {a、 b}、 {b}。
为了实现基站向终端指示进行非周期 CSI反馈所针对的输点测量信息集合和 /或 测量集合的方案, 本发明实施例提供一种 CSI反馈指示方法。
如图 3 所示, 本发明实施例提供的 CSI反馈指示方法, 包括以下步骤:
步骤 30: 基站根据多传输点联合调度的结果, 确定终端进行非周期 CSI反馈所针 对的传输点测量信息集合和 /或下行载波集合对应的测量集合;
步骤 31 : 基站向终端发送针对确定的传输点测量信息集合和 /或确定的下行载波 集合对应的测量集合进行非周期 CSI反馈的指示信息。
步骤 31的具体实现可以釆用如下三种方式中的一种:
方式一, 基站向终端发送针对预先配置的测量集合中的传输点测量信息集合(该 传输点测量信息集合为步骤 31中确定的传输点测量信息集合)进行非周期 CSI反馈 的指示信息,该传输点测量信息集合中包含所述测量集合中的部分或全部传输点测量 信息;
方式二, 基站向终端发送针对确定的下行载波集合对应的测量集合进行非周期 CSI反馈的指示信息;
方式三, 基站向终端发送针对确定的下行载波集合对应的测量集合中的传输点测 量信息集合(该传输点测量信息集合为步骤 31 中确定的传输点测量信息集合)进行 非周期 CSI反馈的指示信息,该传输点测量信息集合中包含确定的下行载波集合对应 的测量集合中的部分或全部传输点测量信息。
方式一可以适用于针对所有下行载波配置一个测量集合的情况下。 方式一和方式 三可以适用于针对每个下行载波集合分别配置一个测量集合的情况下。
具体的, 所述指示信息可以占用 1比特或 2比特或 3比特。 下面举例说: 对于方式一, 基站向终端发送 1比特的指示信息, 以指示终端针对包含预先配置 的测量集合中的全部传输点测量信息的传输点测量信息集合, 进行非周期 CSI反馈; 或者,
基站向终端发送 1比特的指示信息, 以指示终端针对包含预先配置的测量集合中 的第一个传输点测量信息的传输点测量信息集合, 进行非周期 CSI反馈; 或者, 基站向终端发送 2比特或者 3比特的指示信息, 以指示终端针对所述测量集合中 的第一个传输点测试信息或者所述测量集合中的传输点测量信息集合进行非周期 CSI 反馈, 该传输点测量信息集合中包含所述测量集合中的部分或全部传输点测量信息。
对于方式二, 基站向终端发送 2比特或 3比特的指示信息, 以指示终端针对指示 信息所在的当前载波或者确定的下行载波集合对应的测量集合进行非周期 CSI反馈。
对于方式三, 基站向终端发送 2比特或者 3比特或者 4比特的指示信息, 以指示 终端针对确定的下行载波集合对应的测量集合中的传输点测量信息集合进行非周期 CSI反馈, 该传输点测量信息集合中包含确定的下行载波集合对应的测量集合中的部 分或全部传输点测量信息。
进一步的, 在基站向终端发送所述指示信息之前, 基站需要将各测量集合中的传 输点测量信息集合、 各下行载波集合对应的测量集合、 以及各下行载波集合对应的测 量集合中的传输点测量信息集合的信息, 通过高层信令通知给终端。 终端可以根据这 些信息获知各传输点测量信息集合所包含的传输点测量信息、各测量集合所对应的下 行载波集合等。
步骤 31中, 基站可以通过 PDCCH ( Physical Downlink Control Channel, 物理下 行控制信道)上的 DCI信令, 向终端发送所述指示信息。
为了实现终端根据基站的指示针对传输点测量信息集合和 /或测量集合进行非周 期 CSI反馈的方案, 本发明实施例提供一种 CSI反馈方法。
如图 4 所示, 本发明实施例提供的 CSI反馈方法, 包括以下步骤:
步骤 40: 终端接收基站发送的针对传输点测量信息集合和 /或下行载波集合对应 的测量集合进行非周期 CSI反馈的指示信息;
步骤 41 : 终端根据所述指示信息, 向基站反馈相应传输点测量信息集合和 /或下 行载波集合对应的测量集合所对应的 CSI。
这里, 传输点测量信息集合对应的 CSI , 是指根据传输点测量信息集合中包含的 各传输点测量信息测量得到的 CSI。 下行载波集合对应的测量集合所对应的 CSI是指 根据该测量集合中包含的各传输点测量信息测量得到的 CSI。 传输点测量信息集合和 下行载波集合对应的测量集合所对应的 CSI , 是指根据该下行载波集合对应的测量集 合中的传输点测量信息测量集合中包含的各传输点测量信息测量得到的 CSI。
作为一种实施例, 步骤 40 中, 终端可以接收基站发送的针对预先配置的测量集 合中的传输点测量信息集合进行非周期 CSI反馈的指示信息,该传输点测量信息集合 中包含所述测量集合中的部分或全部传输点测量信息;
相应的, 步骤 41中, 终端向基站反馈所述指示信息指示的传输点测量信息集合, 所对应的 CSI。
作为另一种实施例, 步骤 40 中, 终端可以接收基站发送的针对确定的下行载波 集合对应的测量集合进行非周期 CSI反馈的指示信息;
相应的, 步骤 41 中, 终端向基站反馈指示的下行载波集合对应的测量集合, 所 对应的 CSI。
作为又一种实施例, 步骤 40 中, 终端接收基站发送的针对确定的下行载波集合 对应的测量集合中的传输点测量信息集合进行非周期 CSI反馈的指示信息,该传输点 测量信息集合中包含确定的下行载波集合对应的测量集合中的部分或全部传输点测 量信息。
相应的, 步骤 41 中, 终端向基站反馈指示的下行载波集合对应的测量集合中的 传输点测量信息集合, 所对应的 CSI; 该传输点测量信息集合中包含该测量集合中的 部分或全部传输点测量信息。
所述指示信息可以占用 1比特或 2比特或 3比特, 下面举例说明:
若终端接收到 1比特的指示信息,则终端向基站反馈包含预先配置的测量集合中 的全部传输点测量信息的传输点测量信息集合, 所对应的 CSI; 或者,
若接收到 1比特的指示信息,则向基站反馈包含预先配置的测量集合中的第一个 传输点测量信息的传输点测量信息集合, 所对应的 CSI; 或者,
若终端接收到 2比特或者 3比特的指示信息, 则终端向基站反馈指示的所述测量 集合中的第一个传输点测试信息或者所述测量集合中的传输点测量信息集合,所对应 的 CSI;该传输点测量信息集合中包含所述测量集合中的部分或全部传输点测量信息。
若终端接收到 2比特或者 3比特的指示信息, 则终端向基站反馈指示信息所在的 当前载波或者指示的下行载波集合对应的测量集合, 所对应的 CSI;
若终端接收到 2比特或者 3比特或 4比特的指示信息,则终端向基站反馈指示的 下行载波集合对应的测量集合中的传输点测量信息集合, 所对应的 CSI; 该传输点测 量信息集合中包含该测量集合中的部分或全部传输点测量信息。 进一步的, 在终端接收所述指示信息之前,终端接收基站通过高层信令发送的各 测量集合中的传输点测量信息集合、 各下行载波集合对应的测量集合、 以及各下行载 波集合对应的测量集合中的传输点测量信息集合的信息。
步骤 40中, 终端可以通过 PDCCH上的 DCI信令, 接收所述指示信息。
基站与终端侧的交互实现方案如下:
首先, 基站根据多传输点联合调度的结果, 确定终端进行非周期 CSI反馈所针对 的传输点测量信息集合和 /或下行载波集合对应的测量集合;向终端发送针对确定的传 输点测量信息集合和 /或确定的下行载波集合对应的测量集合进行非周期 CSI反馈的 指示信息。
然后,终端接收基站发送的针对传输点测量信息集合和 /或下行载波集合对应的测 量集合进行非周期 CSI反馈的指示信息; 根据所述指示信息, 向基站反馈相应传输点 测量信息集合和 /或下行载波集合对应的测量集合所对应的 CSI。
在交互实现方案中基站和终端的具体实现可以参见上述分别对基站和终端侧的方 法描述, 这里不再赘述。
下面对本发明进行具体说明:
基站根据多个传输点联合调度的结果,通过 DCI信令指示 UE针对确定的传输点 测量信息集合和 /或确定的下行载波集合对应的测量集合, 进行非周期 CSI反馈。 具 体的, 基站根据 UE的系统配置、 联合调度的结果、 测量集合的内容中的至少一个信 息, 决定 DCI信令釆用的比特数, 该比特数可以为 1 -3比特。
情况 1 :针对所有下行载波配置一个测量集合, 测量集合中的各个传输点测量信 息包含所有下行载波的下行参考信号的配置信息;
当测量集合中只有一个传输点测量信息时,釆用 1比特的 DCI信令指示; 也可以 釆用 2比特的 DCI信令指示针对该传输点测量信息所包含的部分或全部下行载波的测 量信息进行非周期 CSI反馈, 比如指示针对该传输点测量信息所包含的主载波或非主 载波的测量信息进行非周期 CSI反馈。
当测量集合中包含多个传输点测量信息时, 釆用 1比特或 2比特或 3比特的 DCI 信令指示。
情况 2: 针对每个下行载波集合分别配置一个测量集合, 每个测量集合中的各个 传输点测量信息包含对应下行载波集合中的各下行载波的下行参考信号的配置信息。
当 UE只配置了一个下行载波时, 釆用 1比特或 2比特的 DCI信令指示。
当 UE配置了多个下行载波时, 釆用 1比特或 2比特或 3比特的 DCI信令指示。 终端接收到基站发送的 DCI信令后,根据该信令包含的信息反馈相应传输点测量 信息集合和 /或下行载波集合对应的测量集合所对应的 CSI。 特别说明, 以上所述的测量集合都是包含主传输点的, 如果标准中定义的测量集 合可以不包含主传输点,则本发明中所说的测量集合即为该测量集合和主传输点的合 并集合。 另外, 以上所说的传输点测量信息一般为传输点所对应的下行参考信号的配 置信息, 常见的为传输点对应的 CSI-RS信息。
实施例一: 对应于上述情况 1。
当测量集合中只有一个传输点测量信息时,釆用 1比特的 DCI信令指示终端针对 包含测量集合中的一个传输点测量信息的传输点测量信息集合, 进行非周期 CSI反 馈;或者釆用 2比特的 DCI信令指示终端针对该传输点测量信息中部分或全部下行载 波的测量信息进行非周期 CSI反馈。
当测量集合中配置了多个传输点测量信息时, 可以釆用如下方法:
方法 1 , 釆用 1比特的 DCI信令指示终端针对包含测量集合中的全部传输点测 量信息的传输点测量信息集合, 进行非周期 CSI反馈;
方法 2, 釆用 2比特的 DCI信令指示终端针对测量集合中的传输点测量信息集合 进行非周期 CSI反馈, 具体如下表:
DCI中的触发比特域 相应内容
'00' 不触发非周期 CSI反馈
只反馈主传输点测量信息对应的 CSK即针对
'or 仅包含测量集合中的主传输点测量信息的传输点
测量信息集合, 进行非周期 CSI反馈 )
反馈测量集合中所有非主传输点测量信息对 应的 CSK即针对包含测量集合中除主传输点外的
' 10'
全部传输点测量信息的传输点测量信息集合, 进 行非周期 CSI反馈)
反馈测量集合中所有主传输点测量信息对应 的 CSK即针对包含测量集合中的全部传输点测量
' 11'
信息的传输点测量信息集合, 进行非周期 CSI反 馈)
或者
DCI中的触发比特域 相应内容
'00' 不触发非周期 CSI反馈
'or 只反馈主传输点的 CSK即针对仅包含测量集 合中的主传输点测量信息的传输点测量信息集
合, 进行非周期 CSI反馈)
只反馈高层配置的第一个传输点测量信息集
' 10'
合对应的 CSI
只反馈高层配置的第二个传输点测量信息
ΊΙ'
集合对应的 CSI 方法 3 , 釆用 3比特的 DCI信令指示终端针对测量集合中的传输点测量信息集合 进行非周期 CSI反馈, 具体如下表:
Figure imgf000011_0001
实施例二: 对应于上述情况 2, 每个下行载波集合中包含一个下行载波。
当用户只配置了一个下行载波时, 此时只有一个下行载波集合, 也只有一个测量 集合,可以釆用 1比特的 DCI信令指示终端针对该测量集合进行非周期 CSI反馈;或 者,
釆用 2比特的 DCI信令指示终端针对该测量集合中的传输点测量信息集合进行非 周期 CSI反馈, 例如:
Figure imgf000012_0001
当用户配置了多个下行载波时, 存在多个下行载波集合, 每个下行载波集合对应 一个测量集合, 可以釆用如下方法:
方法 1 , 釆用 1比特的 DCI信令指示终端针对全部下行载波集合对应的测量集合 进行非周期 CSI反馈;
方法 2, 釆用 2比特的 DCI信令指示终端针对部分下行载波集合对应的测量集合 进行非周期 CSI反馈 , 例如:
DCI中的触发比特域 相应内容
'00' 不触发非周期 CSI反馈
只反馈主载波的 CSI(即针对主载波对应的
'or
测量集合, 进行非周期 CSI反馈 )
只反馈高层配置的第一个服务载波集合的
' 10' CSI (即针对高层配置的第一个服务载波集合对
应的测量集合, 进行非周期 CSI反馈 )
只反馈高层配置的第二个服务载波集合的
' 11' CSI (即针对高层配置的第二个服务载波集合对
应的测量集合, 进行非周期 CSI反馈 ) 其中,反馈某个服务载波的 CSI是指反馈某个服务载波对应的测量集合中所有传 输点测量信息对应的 CSI。
方法 3 , 釆用 3比特的 DCI信令指示终端针对部分下行载波集合对应的测量集合
Figure imgf000013_0001
其中,反馈某个服务载波的 CSI是指反馈某个服务载波的测量集合中所有传输点 测量信息对应的 CSI。
参见图 5 , 本发明实施例提供一种基站, 该基站包括: 确定单元 50, 用于根据多传输点联合调度的结果, 确定终端进行非周期 CSI反 馈所针对的传输点测量信息集合和 /或下行载波集合对应的测量集合;
发送单元 51 , 用于向终端发送针对确定的传输点测量信息集合和 /或确定的下行 载波集合对应的测量集合进行非周期 CSI反馈的指示信息。
所述发送单元 51包括第一指示单元、 第二指示单元、 第三指示单元中的一个或 任意组合, 其中:
所述第一指示单元, 用于向终端发送针对预先配置的测量集合中的传输点测量 信息集合进行非周期 CSI反馈的指示信息,该传输点测量信息集合中包含所述测量集 合中的部分或全部传输点测量信息;
所述第二指示单元, 用于向终端发送针对确定的下行载波集合对应的测量集合 进行非周期 CSI反馈的指示信息;
所述第三指示单元, 用于向终端发送针对确定的下行载波集合对应的测量集合 中的传输点测量信息集合进行非周期 CSI反馈的指示信息,该传输点测量信息集合中 包含确定的下行载波集合对应的测量集合中的部分或全部传输点测量信息。
所述指示信息占用 1比特或 2比特或 3比特。
所述第一指示单元用于:
向终端发送 1 比特的指示信息, 以指示终端针对包含预先配置的测量集合中的 全部传输点测量信息的传输点测量信息集合, 进行非周期 CSI反馈; 或者,
向终端发送 1 比特的指示信息, 以指示终端针对包含预先配置的测量集合中的 第一个传输点测量信息的传输点测量信息集合, 进行非周期 CSI反馈;
向终端发送 2比特或者 3 比特的指示信息, 以指示终端针对所述测量集合中的 第一个传输点测试信息或者所述测量集合中的传输点测量信息集合进行非周期 CSI 反馈, 该传输点测量信息集合中包含所述测量集合中的部分或全部传输点测量信息。
所述第二指示单元用于:
向终端发送 2比特或 3 比特的指示信息, 以指示终端针对指示信息所在的当前 载波或者确定的下行载波集合对应的测量集合进行非周期 CSI反馈。
所述第三指示单元用于:
向终端发送 2比特或者 3比特或者 4比特的指示信息, 以指示终端针对确定的 下行载波集合对应的测量集合中的传输点测量信息集合进行非周期 CSI反馈,该传输 点测量信息集合中包含确定的下行载波集合对应的测量集合中的部分或全部传输点 测量信息。
该基站还包括:
通知单元 52, 用于在向终端发送所述指示信息之前, 将各测量集合中的传输点 测量信息集合、 各下行载波集合对应的测量集合、 以及各下行载波集合对应的测量集 合中的传输点测量信息集合的信息, 通过高层信令通知给终端。
所述发送单元 51用于:
通过物理下行控制信道 PDCCH上的下行控制信息 DCI信令, 向终端发送所述 指示信息。
所述传输点测量信息为: 传输点所对应的下行参考信号的配置信息, 或者该配 置信息的索引, 或者传输点所对应的小区 ID信息。
参见图 6, 本发明实施例提供一种终端, 该终端包括:
接收单元 60, 用于接收基站发送的针对传输点测量信息集合和 /或下行载波集合 对应的测量集合进行非周期 CSI反馈的指示信息;
反馈单元 61 , 用于根据所述指示信息, 向基站反馈相应传输点测量信息集合和 / 或下行载波集合对应的测量集合所对应的 CSI。
所述接收单元 60用于:
接收基站发送的针对预先配置的测量集合中的传输点测量信息集合进行非周期 CSI反馈的指示信息, 该传输点测量信息集合中包含所述测量集合中的部分或全部传 输点测量信息; 或者,
接收基站发送的针对确定的下行载波集合对应的测量集合进行非周期 CSI反馈 的指示信息; 或者,
接收基站发送的针对确定的下行载波集合对应的测量集合中的传输点测量信息 集合进行非周期 CSI反馈的指示信息,该传输点测量信息集合中包含确定的下行载波 集合对应的测量集合中的部分或全部传输点测量信息。
所述指示信息占用 1比特或 2比特或 3比特。
所述反馈单元 61用于:
若接收到 1 比特的指示信息, 则向基站反馈包含预先配置的测量集合中的全部 传输点测量信息的传输点测量信息集合, 所对应的 CSI; 或者,
若接收到 1比特的指示信息,则向基站反馈包含预先配置的测量集合中的第一个 传输点测量信息的传输点测量信息集合, 所对应的 CSI; 或者,
若接收到 2比特或者 3 比特的指示信息, 则向基站反馈指示的所述测量集合中 的第一个传输点测试信息或者所述测量集合中的传输点测量信息集合,所对应的 CSI; 该传输点测量信息集合中包含所述测量集合中的部分或全部传输点测量信息; 或者, 若接收到 2比特或者 3 比特的指示信息, 则向基站反馈指示信息所在的当前载 波或者指示的下行载波集合对应的测量集合, 所对应的 CSI;
若接收到 2比特或者 3比特或 4比特的指示信息, 则向基站反馈指示的下行载 波集合对应的测量集合中的传输点测量信息集合, 所对应的 CSI; 该传输点测量信息 集合中包含该测量集合中的部分或全部传输点测量信息。
所述接收单元 60还用于:
接收基站通过高层信令发送的各测量集合中的传输点测量信息集合、 各下行载 波集合对应的测量集合、以及各下行载波集合对应的测量集合中的传输点测量信息集 合的信息。
所述接收单元 60用于:
通过物理下行控制信道 PDCCH上的下行控制信息 DCI信令, 接收所述指示信 息。
所述传输点测量信息为: 传输点所对应的下行参考信号的配置信息, 或者该配 置信息的索引, 或者传输点所对应的小区 ID信息。
综上, 本发明的有益效果包括:
本发明实施例提供的方案中, 基站根据多传输点联合调度的结果, 确定终端进 行非周期 CSI反馈所针对的传输点测量信息集合和 /或下行载波集合对应的测量集合, 并向终端发送针对确定的传输点测量信息集合和 /或确定的下行载波集合对应的测量 集合进行非周期 CSI反馈的指示信息, 从而实现了基站向终端指示进行非周期 CSI 反馈所针对的输点测量信息集合和 /或测量集合的方案。
终端接收基站发送的针对传输点测量信息集合和 /或下行载波集合对应的测量集 合进行非周期 CSI反馈的指示信息, 并根据所述指示信息, 向基站反馈相应传输点测 量信息集合和 /或下行载波集合对应的测量集合所对应的 CSI,从而实现了终端根据基 站的指示针对传输点测量信息集合和 /或测量集合进行非周期 CSI反馈的方案。
由于本发明中基站可以指示终端针对传输点测量信息集合和 /或测量集合进行非 周期 CSI反馈,终端根据基站的指示进行 CSI反馈,使得基站可以获得 CoMP传输所 需的 CSI, 进而可以支持各种 CoMP传输方案, 从而获得显著的吞吐量增益。
本发明可以同时支持单点传输和 CoMP传输所需的 CSI的反馈。 本发明具有后 向兼容性, 可以兼容现有的非周期 CSI反馈方法。
本发明是参照根据本发明实施例的方法、 设备(系统)、 和计算机程序产品的流 程图和 /或方框图来描述的。应理解可由计算机程序指令实现流程图和 /或方框图中 的每一流程和 /或方框、 以及流程图和 /或方框图中的流程和 /或方框的结合。 可提 供这些计算机程序指令到通用计算机、 专用计算机、 嵌入式处理机或其他可编程数据 处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处 理器执行的指令产生用于实现在流程图一个流程或多个流程和 /或方框图一个方框 或多个方框中指定的功能的装置。 这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特 定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包 括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和 /或方框图一 个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上, 使得在 计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计 算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例, 但本领域内的技术人员一旦得知了基本创 造性概念, 则可对这些实施例作出另外的变更和修改。 所以, 所附权利要求意欲解释 为包括优选实施例以及落入本发明范围的所有变更和修改。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的 精神和范围。 这样, 倘若本发明的这些修改和变型属于本发明权利要求及其等同技术 的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种信道状态信息 CSI反馈指示方法, 其特征在于, 该方法包括: 基站根据多传输点联合调度的结果, 确定终端进行非周期 CSI反馈所针对的传输 点测量信息集合和 /或下行载波集合对应的测量集合;
基站向终端发送针对确定的传输点测量信息集合和 /或确定的下行载波集合对应 的测量集合进行非周期 CSI反馈的指示信息。
2、 如权利要求 1 所述的方法, 其特征在于, 所述基站向终端发送针对确定的传 输点测量信息集合和 /或确定的下行载波集合对应的测量集合进行非周期 CSI反馈的 指示信息包括:
基站向终端发送针对预先配置的测量集合中的传输点测量信息集合进行非周期
CSI反馈的指示信息, 该传输点测量信息集合中包含所述测量集合中的部分或全部传 输点测量信息; 或者,
基站向终端发送针对确定的下行载波集合对应的测量集合进行非周期 CSI反馈的 指示信息; 或者,
基站向终端发送针对确定的下行载波集合对应的测量集合中的传输点测量信息 集合进行非周期 CSI反馈的指示信息,该传输点测量信息集合中包含确定的下行载波 集合对应的测量集合中的部分或全部传输点测量信息。
3、 如权利要求 2所述的方法, 其特征在于, 所述指示信息占用 1比特或 2比特 或 3比特。
4、 如权利要求 3 所述的方法, 其特征在于, 所述基站向终端发送针对预先配置 的测量集合中的传输点测量信息集合进行非周期 CSI反馈的指示信息包括:
基站向终端发送 1比特的指示信息, 以指示终端针对包含预先配置的测量集合中 的全部传输点测量信息的传输点测量信息集合, 进行非周期 CSI反馈; 或者,
基站向终端发送 1比特的指示信息, 以指示终端针对包含预先配置的测量集合中 的第一个传输点测量信息的传输点测量信息集合, 进行非周期 CSI反馈; 或者, 基站向终端发送 2比特或者 3比特的指示信息, 以指示终端针对所述测量集合中 的第一个传输点测试信息或者所述测量集合中的传输点测量信息集合进行非周期 CSI 反馈, 该传输点测量信息集合中包含所述测量集合中的部分或全部传输点测量信息。
5、 如权利要求 3 所述的方法, 其特征在于, 所述基站向终端发送针对确定的下 行载波集合对应的测量集合进行非周期 CSI反馈的指示信息包括:
基站向终端发送 2比特或 3比特的指示信息, 以指示终端针对指示信息所在的当 前载波或者确定的下行载波集合对应的测量集合进行非周期 CSI反馈。
6、 如权利要求 3 所述的方法, 其特征在于, 所述基站向终端发送针对确定的下 行载波集合对应的测量集合中的传输点测量信息集合进行非周期 CSI反馈的指示信 息包括:
基站向终端发送 2比特或者 3比特或者 4比特的指示信息, 以指示终端针对确定 的下行载波集合对应的测量集合中的传输点测量信息集合进行非周期 CSI反馈,该传 输点测量信息集合中包含确定的下行载波集合对应的测量集合中的部分或全部传输 点测量信息。
7、 如权利要求 2-6中任一所述的方法, 其特征在于, 在基站向终端发送所述指示 信息之前, 进一步包括:
基站将各测量集合中的传输点测量信息集合、 各下行载波集合对应的测量集合、 以及各下行载波集合对应的测量集合中的传输点测量信息集合的信息,通过高层信令 通知给终端。
8、 如权利要求 1-6任一所述的方法, 其特征在于, 基站通过物理下行控制信道 PDCCH上的下行控制信息 DCI信令, 向终端发送所述指示信息。
9、 如权利要求 2-6任一所述的方法, 其特征在于, 所述传输点测量信息为: 传输 点所对应的下行参考信号的配置信息, 或者该配置信息的索引, 或者传输点所对应的 小区标识 ID信息。
10、 一种信道状态信息 CSI反馈方法, 其特征在于, 该方法包括:
终端接收基站发送的针对传输点测量信息集合和 /或下行载波集合对应的测量集 合进行非周期 CSI反馈的指示信息;
终端根据所述指示信息,向基站反馈相应传输点测量信息集合和 /或下行载波集合 对应的测量集合所对应的 CSI。
11、如权利要求 10所述的方法,其特征在于, 所述终端接收基站发送的针对传输 点测量信息集合和 /或下行载波集合对应的测量集合进行非周期 CSI反馈的指示信息 包括:
终端接收基站发送的针对预先配置的测量集合中的传输点测量信息集合进行非 周期 CSI反馈的指示信息,该传输点测量信息集合中包含所述测量集合中的部分或全 部传输点测量信息; 或者,
终端接收基站发送的针对确定的下行载波集合对应的测量集合进行非周期 CSI反 馈的指示信息; 或者,
终端接收基站发送的针对确定的下行载波集合对应的测量集合中的传输点测量 信息集合进行非周期 CSI反馈的指示信息,该传输点测量信息集合中包含确定的下行 载波集合对应的测量集合中的部分或全部传输点测量信息。
12、如权利要求 11所述的方法,其特征在于, 所述指示信息占用 1比特或 2比特 或 3比特。
13、 如权利要求 12 所述的方法, 其特征在于, 所述终端根据所述指示信息, 向 基站反馈相应传输点测量信息集合和 /或下行载波集合对应的测量集合所对应的 CSI 包括:
若终端接收到 1比特的指示信息, 则终端向基站反馈包含预先配置的测量集合中 的全部传输点测量信息的传输点测量信息集合, 所对应的 CSI; 或者,
若终端接收到 1比特的指示信息, 则终端向基站反馈包含预先配置的测量集合中 的第一个传输点测量信息的传输点测量信息集合, 所对应的 CSI; 或者,
若终端接收到 2比特或者 3比特的指示信息, 则终端向基站反馈指示的所述测量 集合中的第一个传输点测试信息或者所述测量集合中的传输点测量信息集合,所对应 的 CSI;该传输点测量信息集合中包含所述测量集合中的部分或全部传输点测量信息; 或者,
若终端接收到 2比特或者 3比特的指示信息, 则终端向基站反馈指示信息所在的 当前载波或者指示的下行载波集合对应的测量集合, 所对应的 CSI; 或者,
若终端接收到 2比特或者 3比特或 4比特的指示信息, 则终端向基站反馈指示的 下行载波集合对应的测量集合中的传输点测量信息集合, 所对应的 CSI; 该传输点测 量信息集合中包含该测量集合中的部分或全部传输点测量信息。
14、 如权利要求 11-13 中任一所述的方法, 其特征在于, 在终端接收所述指示信 息之前, 进一步包括:
终端接收基站通过高层信令发送的各测量集合中的传输点测量信息集合、 各下行 载波集合对应的测量集合、以及各下行载波集合对应的测量集合中的传输点测量信息 集合的信息。
15、 如权利要求 10-13任一所述的方法, 其特征在于, 终端通过物理下行控制信 道 PDCCH上的下行控制信息 DCI信令, 接收所述指示信息。
16、 如权利要求 11-13任一所述的方法, 其特征在于, 所述传输点测量信息为: 传输点所对应的下行参考信号的配置信息, 或者该配置信息的索引, 或者传输点所对 应的小区标识 ID信息。
17、 一种基站, 其特征在于, 该基站包括:
确定单元, 用于根据多传输点联合调度的结果, 确定终端进行非周期 CSI反馈所 针对的传输点测量信息集合和 /或下行载波集合对应的测量集合;
发送单元,用于向终端发送针对确定的传输点测量信息集合和 /或确定的下行载波 集合对应的测量集合进行非周期 CSI反馈的指示信息。
18、 如权利要求 17所述的基站, 其特征在于, 所述发送单元包括第一指示单元、 第二指示单元、 第三指示单元中的一个或任意组合, 其中:
所述第一指示单元, 用于向终端发送针对预先配置的测量集合中的传输点测量信 息集合进行非周期 CSI反馈的指示信息,该传输点测量信息集合中包含所述测量集合 中的部分或全部传输点测量信息;
所述第二指示单元, 用于向终端发送针对确定的下行载波集合对应的测量集合进 行非周期 CSI反馈的指示信息;
所述第三指示单元, 用于向终端发送针对确定的下行载波集合对应的测量集合中 的传输点测量信息集合进行非周期 CSI反馈的指示信息,该传输点测量信息集合中包 含确定的下行载波集合对应的测量集合中的部分或全部传输点测量信息。
19、 如权利要求 18所述的基站, 其特征在于, 所述指示信息占用 1比特或 2比 特或 3比特。
20、 如权利要求 19所述的基站, 其特征在于, 所述第一指示单元用于: 向终端发送 1比特的指示信息, 以指示终端针对包含预先配置的测量集合中的全 部传输点测量信息的传输点测量信息集合, 进行非周期 CSI反馈; 或者,
向终端发送 1比特的指示信息, 以指示终端针对包含预先配置的测量集合中的第 一个传输点测量信息的传输点测量信息集合, 进行非周期 CSI反馈;
向终端发送 2比特或者 3比特的指示信息, 以指示终端针对所述测量集合中的第 一个传输点测试信息或者所述测量集合中的传输点测量信息集合进行非周期 CSI反 馈, 该传输点测量信息集合中包含所述测量集合中的部分或全部传输点测量信息。
21、 如权利要求 19所述的基站, 其特征在于, 所述第二指示单元用于: 向终端发送 2比特或 3比特的指示信息, 以指示终端针对指示信息所在的当前载 波或者确定的下行载波集合对应的测量集合进行非周期 CSI反馈。
22、 如权利要求 19所述的基站, 其特征在于, 所述第三指示单元用于: 向终端发送 2比特或者 3比特或者 4比特的指示信息, 以指示终端针对确定的下 行载波集合对应的测量集合中的传输点测量信息集合进行非周期 CSI反馈,该传输点 测量信息集合中包含确定的下行载波集合对应的测量集合中的部分或全部传输点测 量信息。
23、 如权利要求 18-22中任一所述的基站, 其特征在于, 该基站还包括: 通知单元, 用于在向终端发送所述指示信息之前, 将各测量集合中的传输点测量 信息集合、 各下行载波集合对应的测量集合、 以及各下行载波集合对应的测量集合中 的传输点测量信息集合的信息, 通过高层信令通知给终端。
24、 如权利要求 17-22任一所述的基站, 其特征在于, 所述发送单元用于: 通过物理下行控制信道 PDCCH上的下行控制信息 DCI信令,向终端发送所述指 示信息。
25、 如权利要求 18-22任一所述的基站, 其特征在于, 所述传输点测量信息为: 传输点所对应的下行参考信号的配置信息, 或者该配置信息的索引, 或者传输点所对 应的小区标识 ID信息。
26、 一种终端, 其特征在于, 该终端包括:
接收单元,用于接收基站发送的针对传输点测量信息集合和 /或下行载波集合对应 的测量集合进行非周期 CSI反馈的指示信息;
反馈单元,用于根据所述指示信息, 向基站反馈相应传输点测量信息集合和 /或下 行载波集合对应的测量集合所对应的 CSI。
27、 如权利要求 26所述的终端, 其特征在于, 所述接收单元用于:
接收基站发送的针对预先配置的测量集合中的传输点测量信息集合进行非周期 CSI反馈的指示信息, 该传输点测量信息集合中包含所述测量集合中的部分或全部传 输点测量信息; 或者,
接收基站发送的针对确定的下行载波集合对应的测量集合进行非周期 CSI反馈 的指示信息; 或者,
接收基站发送的针对确定的下行载波集合对应的测量集合中的传输点测量信息 集合进行非周期 CSI反馈的指示信息,该传输点测量信息集合中包含确定的下行载波 集合对应的测量集合中的部分或全部传输点测量信息。
28、 如权利要求 27所述的终端, 其特征在于, 所述指示信息占用 1比特或 2比 特或 3比特。
29、 如权利要求 28所述的终端, 其特征在于, 所述反馈单元用于:
若接收到 1比特的指示信息,则向基站反馈包含预先配置的测量集合中的全部传 输点测量信息的传输点测量信息集合, 所对应的 CSI; 或者,
若接收到 1比特的指示信息,则向基站反馈包含预先配置的测量集合中的第一个 传输点测量信息的传输点测量信息集合, 所对应的 CSI; 或者,
若接收到 2比特或者 3比特的指示信息,则向基站反馈指示的所述测量集合中的 第一个传输点测试信息或者所述测量集合中的传输点测量信息集合, 所对应的 CSI; 该传输点测量信息集合中包含所述测量集合中的部分或全部传输点测量信息; 或者, 若接收到 2比特或者 3比特的指示信息,则向基站反馈指示信息所在的当前载波 或者指示的下行载波集合对应的测量集合, 所对应的 CSI; 或者,
若接收到 2比特或者 3比特或 4比特的指示信息,则向基站反馈指示的下行载波 集合对应的测量集合中的传输点测量信息集合, 所对应的 CSI; 该传输点测量信息集 合中包含该测量集合中的部分或全部传输点测量信息。
30、 如权利要求 27-29中任一所述的终端, 其特征在于, 所述接收单元还 用于:
接收基站通过高层信令发送的各测量集合中的传输点测量信息集合、 各下行载波 集合对应的测量集合、 以及各下行载波集合对应的测量集合中的传输点测量信息集合 的信息。
31、 如权利要求 26-29任一所述的终端, 其特征在于, 所述接收单元用于: 通过物理下行控制信道 PDCCH上的下行控制信息 DCI信令,接收所述指示信息。
32、 如权利要求 27-29任一所述的终端, 其特征在于, 所述传输点测量信息为: 传输点所对应的下行参考信号的配置信息, 或者该配置信息的索引, 或者传输点所对 应的小区标识 ID信息。
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