WO2015161795A1 - 一种信道状态信息测量的方法、系统及设备 - Google Patents

一种信道状态信息测量的方法、系统及设备 Download PDF

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Publication number
WO2015161795A1
WO2015161795A1 PCT/CN2015/077170 CN2015077170W WO2015161795A1 WO 2015161795 A1 WO2015161795 A1 WO 2015161795A1 CN 2015077170 W CN2015077170 W CN 2015077170W WO 2015161795 A1 WO2015161795 A1 WO 2015161795A1
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reference signal
side device
network side
user equipment
reference signals
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PCT/CN2015/077170
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English (en)
French (fr)
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苏昕
李传军
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电信科学技术研究院
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Priority to KR1020167029644A priority Critical patent/KR101828733B1/ko
Priority to JP2016563984A priority patent/JP6456404B2/ja
Priority to US15/303,657 priority patent/US10333605B2/en
Priority to EP15782453.3A priority patent/EP3136616B1/en
Publication of WO2015161795A1 publication Critical patent/WO2015161795A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • 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
    • 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
    • H04B7/0617—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 for beam forming
    • 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
    • H04B7/0643—Feedback on request
    • 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
    • H04B7/12—Frequency diversity
    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices

Definitions

  • the present application relates to the field of wireless communication technologies, and in particular, to a method, system, and device for measuring channel state information.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • the radio access technology standards are all based on MIMO+OFDM (Orthogonal Frequency Division Multiplexing) technology.
  • the performance gain of MIMO technology comes from the spatial freedom that multi-antenna systems can obtain. Therefore, one of the most important evolution directions of MIMO technology in the development of standardization is the expansion of dimensions.
  • LTE Rel (version)-8 up to 4 layers of MIMO transmission can be supported.
  • Rel-9 focuses on MU-MIMO technology
  • MU-MIMO Multiple-user MIMO
  • Rel-10 further improves channel state information through the introduction of 8-port CSI-RS (Channel State Information Reference Signal), DMRS (Demodulation Reference Symbol) and multi-granular codebook.
  • CSI-RS Channel State Information Reference Signal
  • DMRS Demodulation Reference Symbol
  • multi-granular codebook The spatial resolution and further extend the transmission capability of SU-MIMO (Single-User MIMO) to a maximum of 8 data layers.
  • the channel state information accuracy that can be obtained by the network side directly determines the accuracy of precoding/beamforming and the performance of the scheduling algorithm, thereby affecting the overall system performance. Therefore, the acquisition of channel state information has always been one of the core issues in the standardization of MIMO technology.
  • FDD frequency division duplex
  • FDD systems generally employ a mechanism based on downlink reference signal measurements and feedback CSI. In this case, the spatial resolution of the channel state information is directly dependent on the number of ports of the reference signal.
  • the present application provides a method, a system, and a device for measuring channel state information, which are used to solve the performance advantages of the Massive MIMO in the prior art, and the current mechanism based on downlink reference signal measurement and feedback CSI will bring Significant time-frequency resource overhead issues.
  • the network side device sends a beamforming group of reference signals to the user equipment, so that the user equipment measures the reference signal, where each reference signal of the group of reference signals corresponds to a space in the sector;
  • the network side device determines, according to the information fed back by the user equipment, whether to adjust the shaping manner of the reference signal.
  • each reference signal in a sector corresponds to a different identification.
  • the network side device determines, according to the information fed back by the user equipment, whether to adjust the shaping manner of the reference signal, including:
  • the network side device determines whether to adjust the shaping manner of the reference signal according to the quality information corresponding to each reference signal.
  • the network side device determines, according to the information fed back by the user equipment, whether to adjust the shaping manner of the reference signal, and further includes:
  • the network side device After determining that the shaping mode of the reference signal needs to be adjusted, the network side device determines each space in a space corresponding to the reference signal with the best quality information;
  • the network side device adjusts the shaping manner of the reference signal corresponding to each space determined, and each space to be determined
  • the corresponding reference signal acts as a set of reference signals and returns a step of transmitting a beamformed set of reference signals to the user equipment.
  • the reference signal is a channel state information measurement reference signal CSI-RS.
  • each reference signal in one sector corresponds to a different CSI-RS configuration and/or a different CSI-RS port.
  • the set of CSI-RSs is a partial CSI-RS in a CSI-RS broadcast by the network side device;
  • the CSI-RSs of different user equipments are partially or completely the same.
  • the method further includes:
  • the network side device determines different reference signals by using part or all of the time domain, the frequency domain, and the code domain.
  • the user equipment measures the received beamformed set of reference signals from the network side device, wherein each of the set of reference signals corresponds to a space in the sector;
  • the user equipment feeds back information to the network side device according to the measurement result, so that the network side device determines whether to adjust the shaping manner of the reference signal according to the feedback information.
  • the user equipment feeds back information to the network side device according to the measurement result, including:
  • the user equipment feeds back, to the network side device, an identifier of the reference signal that is measured and corresponding quality information.
  • the user equipment feeds back information to the network side device according to the measurement result, including:
  • the user equipment sorts the identifier of each reference signal and the corresponding quality information according to the channel quality corresponding to the reference signal, and then feeds back to the network side device.
  • a sending module configured to send a beamforming group of reference signals to the user equipment, so that the user equipment measures the reference signal, where each of the reference signals corresponds to a space in the sector;
  • the processing module is configured to determine, according to the information fed back by the user equipment, whether to adjust the shaping manner of the reference signal.
  • each reference signal in a sector corresponds to a different identification.
  • the processing module is specifically configured to:
  • the processing module is further configured to:
  • the device determines each space in the space corresponding to the reference signal with the best quality information; and adjusts the shaping manner of the reference signal corresponding to each space determined, and each determined
  • the spatially corresponding reference signals act as a set of reference signals and return to the step of transmitting a beamformed set of reference signals to the user equipment.
  • the reference signal is a channel state information measurement reference signal CSI-RS.
  • each reference signal in one sector corresponds to a different CSI-RS configuration and/or a different CSI-RS port.
  • the set of CSI-RSs is a partial CSI-RS in a CSI-RS broadcast by the network side device;
  • the CSI-RSs of different user equipments are partially or completely the same.
  • the sending module is further configured to:
  • Different reference signals are determined by part or all of the time domain, the frequency domain and the code domain.
  • a measuring module configured to measure received beamforming a set of reference signals from a network side device, wherein each of the reference signals corresponds to a space in the sector;
  • a feedback module configured to feed back information to the network side device according to the measurement result, so that the network side device determines, according to the feedback information, whether to adjust a shaping manner of the reference signal.
  • the feedback module is specifically configured to:
  • the feedback module is specifically configured to:
  • a network side device configured to send a beamforming group of reference signals to the user equipment, so that the user equipment measures the reference signal, where each reference signal of the group of reference signals corresponds to a space in the sector Determining whether to adjust the shaping mode of the reference signal according to the information fed back by the user equipment;
  • a user equipment configured to measure received beamforming a set of reference signals from the network side device, where each of the reference signals corresponds to a space in the sector; according to the measurement result to the network
  • the side device feeds back information, so that the network side device determines whether to adjust the shaping mode of the reference signal according to the feedback information.
  • the network side device sends a group of reference signals that are beam-shaped to the user equipment, and determines whether to adjust the shaping mode of the reference signal according to the information fed back by the user equipment.
  • the information of the beamformed reference information determines whether the shape of the reference signal is adjusted, and the purpose of measuring the channel state information is achieved, and the shaped reference signal is used, and the number of reference signals required corresponds to the number of beams.
  • the feedback overhead does not increase unrestricted as the number of antennas increases, thereby reducing the overhead of downlink reference signal measurement and feedback while ensuring the performance advantages of Massive MIMO; Resource utilization and system performance.
  • FIG. 1 is a schematic structural diagram of a system for measuring channel state information according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a reference signal beam group search according to Embodiment 2 of the present application.
  • FIG. 3 is a schematic structural diagram of a network side device in a system for measuring three-channel state information according to an embodiment of the present application
  • FIG. 4 is a schematic structural diagram of user equipment in a system for measuring four-channel state information according to an embodiment of the present application
  • FIG. 5 is a schematic structural diagram of a network side device in a system for measuring five-channel state information according to an embodiment of the present application
  • FIG. 6 is a schematic structural diagram of user equipment in a system for measuring six-channel state information according to an embodiment of the present application
  • FIG. 7 is a schematic flowchart of a method for measuring channel state information according to Embodiment 7 of the present application.
  • FIG. 8 is a schematic flowchart of a method for measuring eight-channel state information according to an embodiment of the present application.
  • the network side device sends a beamforming shaped reference signal to the user equipment, and determines whether to adjust the shaping mode of the reference signal according to the information fed back by the user equipment, so that the network side device can roughly determine the channel change. If the channel changes slowly, the base station may instruct the UE to further measure and feed back information in a more fine manner, thereby reducing the overhead of downlink reference signal measurement and feedback while ensuring the performance advantages of the Massive MIMO; Resource utilization and system performance.
  • the system for measuring channel state information in the embodiment of the present application includes: a network side device 10 and a user equipment 11.
  • the network side device 10 is configured to send a beamforming group of reference signals to the user equipment 11 to enable the user equipment 11 to measure the reference signal, where each of the reference signals corresponds to one of the sectors. Space; determining whether to adjust the shaping mode of the reference signal according to the information fed back by the user equipment;
  • the user equipment 11 is configured to measure a received beamforming reference signal from the network side device 10, where each reference signal of the group of reference signals corresponds to a space in the sector; according to the measurement result to the network
  • the information fed back by the side device is such that the network side device 10 determines whether to adjust the shaping mode of the reference signal according to the feedback information.
  • the embodiment of the present application divides a sector into a plurality of spaces, and each space can be further refined into a plurality of spaces according to requirements, and the refined space can be further refined into multiple spaces according to requirements, and so on.
  • the embodiment of the present application divides a sector by multiple beams.
  • the network side device determines different reference signals by using part or all of the time domain, the frequency domain, and the code domain.
  • the multi-antenna system can generate a specific beam by weighting the weights, that is, the shaping weight determines the direction and shape of the beam.
  • H and V beams can be set in the horizontal and vertical dimensions respectively, and for the two-dimensional planar array including N H and N V horizontal and vertical ports, the shaping rights of the [n h , n v ] beams
  • the value can be expressed as:
  • ( ⁇ ) T represents the transpose of the matrix.
  • the horizontal and vertical angles of the [n h , n v ] beams are respectively indicated, and ⁇ H and ⁇ V represent the minimum horizontal and vertical angle differences between adjacent beams, respectively.
  • a preferred approach is to achieve a layer-by-layer improvement in spatial resolution using a beam set of a multi-level tree structure.
  • the highest resolution primary reference signal beam set (each element corresponding to the leaf node of the digital structure) can be designed first, then divided into several subgroups, and a reference signal is selected for each subgroup.
  • the beam acts as its root (each subgroup + its root node forms a subtree).
  • the root of each subtree can be used as the leaf node of the subtree of the upper level (lower spatial resolution), and so on to form a multi-level tree structure.
  • Each of the reference signals corresponds to one space in the sector, and the spatial size of the reference signals of different groups may be different, for example, the reference signal A corresponds to one of a plurality of spaces divided by one sector, and the reference signal B corresponds to one of the spaces after the space has been refined.
  • each reference signal may be assigned an identifier. Since the feedback information is sent in units of groups, it is only necessary to ensure that each reference signal in one sector corresponds to a different identifier.
  • the number of reference signals and the manner of distinguishing may be agreed in advance or indicated by signaling.
  • the reference signal is a CSI-RS.
  • the network side device sends, to the user equipment, a set of CSI-RSs with beamforming, and the group of CSI-RSs with beamforming may be a subgroup in the broadcast, and the subgroups may partially overlap.
  • the beam resolution of different users can also be different.
  • Each reference signal corresponds to a different CSI-RS configuration and/or a different CSI-RS port.
  • the user equipment feeds back information to the network side device according to the measurement result
  • the user equipment feeds back to the network side device.
  • the quality information here includes but is limited to some or all of the following information:
  • CQI Channel Quality Indicator
  • TBS Transport Block Size
  • the user equipment records the ID of the reference signal with the best channel quality; when feeding back to the network side device, the ID corresponding to the best reference signal may be marked.
  • the user equipment sorts the identifier of each reference signal and the corresponding quality information according to the channel quality corresponding to the reference signal, and then feeds back to the network side device.
  • the best signal quality is A, followed by C, and the worst is B.
  • the order of signal quality in the feedback information is reference signal A, reference signal C and reference signal B, or Reference signal B, reference signal C and reference signal A.
  • the network side device determines, according to the information fed back by the user equipment, whether to adjust the shape information of the reference signal, and determines the quality information corresponding to each reference signal according to the identifier and the quality information fed back by the user equipment; The quality information determines whether the adjustment of the reference signal is adjusted.
  • the network side device may determine, according to the received quality information, a channel change situation in the time window or feedback a change of the channel quality corresponding to the N times or a channel quality of multiple user equipments to determine whether to further adjust the shape of the reference signal. the way.
  • the network side device can determine the speed of the channel change according to the information reported by the user equipment. If the channel changes faster than a certain range, the channel is considered unstable and needs to be adjusted. Otherwise, it is considered that no adjustment is needed.
  • a preferred method is that the network side device determines each space in the space corresponding to the reference signal with the best quality information, and determines the reference signal corresponding to each space as a set of reference signals, and Returning to the step of transmitting a beamformed set of reference signals to the user equipment.
  • the method of adjusting the beamforming can refer to the following formula:
  • ⁇ H1 and ⁇ V1 respectively represent the minimum horizontal and vertical angle differences between adjacent beams after refinement.
  • the network side device may determine the speed of the channel change according to the information, and determine whether further space needs to be divided, for example, determining the channel change. Is it too fast (whether the difference between the highest value and the lowest value exceeds a set threshold in a period of time), if the channel changes too fast, it can further divide each space after division to obtain multiple spaces. Then, the reference signal corresponding to each space determined last time is taken as a set of reference signals, and the step of transmitting a beamformed set of reference signals to the user equipment is returned.
  • the network side device determines each space in the space corresponding to the best reference signal of the quality information, if the space corresponding to the best reference signal of the quality information is not divided, the reference signal with the best quality information may be first matched. The space is divided to obtain a plurality of spaces, and then each space obtained is determined; if the space corresponding to the best reference signal of the quality information is divided in advance, the space corresponding to the reference signal having the best quality information can be directly determined. Space.
  • a preferred method is to transmit a reference signal with a higher spatial resolution to the user equipment. See Figure 2 for details.
  • the search may be first performed in a relatively low resolution in the current reference signal beam group.
  • the leaf of the subtree may be further used.
  • the node acts as the reference signal group for the next iteration. If the reference signal corresponding to the leaf node B is considered to be the best channel quality (ie, no adjustment is needed) in the subtree of the current resolution level, the reference signal group determined by the node B may be further used to perform beam selection and reporting.
  • One subgroup corresponds to one user equipment, and each subgroup contains several beams. Subgroups may overlap partially or completely. If the subgroups are completely overlapped, it means that the corresponding beam groups that need to be measured by multiple UEs are the same.
  • the network side device in the embodiment of the present application may be a base station (such as a macro base station, a home base station, etc.), or may be an RNC (Radio Network Controller) or other network side device, or may be a new network side device.
  • a base station such as a macro base station, a home base station, etc.
  • RNC Radio Network Controller
  • the network side device in the system for measuring three-channel state information in the embodiment of the present application includes:
  • the sending module 300 is configured to send a beamforming group of reference signals to the user equipment, so that the user equipment measures the reference signal, where each reference signal of the group of reference signals corresponds to a space in the sector;
  • the processing module 310 is configured to determine, according to the information fed back by the user equipment, whether to adjust the shaping manner of the reference signal.
  • each reference signal in a sector corresponds to a different identification.
  • the processing module is specifically configured to:
  • the processing module is further configured to:
  • the device determines each space in the space corresponding to the reference signal with the best quality information; and adjusts the shaping manner of the reference signal corresponding to each space determined, and each determined
  • the spatially corresponding reference signals act as a set of reference signals and return to the step of transmitting a beamformed set of reference signals to the user equipment.
  • the reference signal is a channel state information measurement reference signal CSI-RS.
  • each reference signal in one sector corresponds to a different CSI-RS configuration and/or a different CSI-RS port.
  • the set of CSI-RSs is a partial CSI-RS in a CSI-RS broadcast by the network side device;
  • the CSI-RSs of different user equipments are partially or completely the same.
  • the sending module 300 is further configured to:
  • Different reference signals are determined by part or all of the time domain, the frequency domain and the code domain.
  • the user equipment in the system for measuring four-channel state information in the embodiment of the present application includes:
  • the measuring module 400 is configured to measure the received beamforming group of reference signals from the network side device, where each of the reference signals corresponds to a space in the sector;
  • the feedback module 410 is configured to feed back information to the network side device according to the measurement result, so that the network side device determines, according to the feedback information, whether to adjust the shaping manner of the reference signal.
  • the feedback module 410 is specifically configured to:
  • the identifier of the reference signal for measurement and the corresponding quality information are fed back to the network side device.
  • the feedback module 410 is specifically configured to:
  • the identifier of each reference signal and the corresponding quality information are sorted and then fed back to the network side device.
  • the network side device in the system for measuring five-channel state information in the embodiment of the present application includes:
  • the processor 500 is configured to send, by the transceiver 510, a beamforming group of reference signals to the user equipment, so that the user equipment measures the reference signal, where each of the reference signals corresponds to a sector a space; determining whether to adjust the shaping mode of the reference signal according to the information fed back by the user equipment;
  • the transceiver 510 is configured to receive and transmit data under the control of the processor 500.
  • each reference signal in one sector corresponds to a different channel state information measurement reference signal CSI-RS configuration and/or a different CSI-RS port.
  • each reference signal in a sector corresponds to a different identification.
  • the processor 500 is specifically configured to:
  • the processor 500 is further configured to:
  • the device determines each space in the space corresponding to the reference signal with the best quality information; and adjusts the shaping manner of the reference signal corresponding to each space determined, and each determined
  • the spatially corresponding reference signals act as a set of reference signals and return to the step of transmitting a beamformed set of reference signals to the user equipment.
  • the reference signal is a channel state information measurement reference signal CSI-RS.
  • each reference signal in one sector corresponds to a different CSI-RS configuration and/or a different CSI-RS port.
  • the set of CSI-RSs is a partial CSI-RS in a CSI-RS broadcast by the network side device;
  • the CSI-RSs of different user equipments are partially or completely the same.
  • the processor 500 is further configured to:
  • Different reference signals are determined by part or all of the time domain, the frequency domain and the code domain.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 500 and various circuits of memory represented by memory 520.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 510 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.
  • the processor 500 is responsible for managing the bus architecture and general processing, and the memory 520 can store data used by the processor 500 when performing operations.
  • the user equipment in the system for measuring six-channel state information in the embodiment of the present application includes:
  • the processor 600 is configured to measure, by the transceiver 610, the received beamforming group of reference signals from the network side device, where each of the reference signals corresponds to a space in the sector; As a result, the information is fed back to the network side device by the transceiver 610, so that the network side device determines whether to adjust the shaping mode of the reference signal according to the feedback information.
  • the transceiver 610 is configured to receive and transmit data under the control of the processor 600.
  • the processor 600 is specifically configured to:
  • the identifier of the reference signal for measurement and the corresponding quality information are fed back to the network side device.
  • the processor 600 is specifically configured to:
  • the identifier of each reference signal and the corresponding quality information are sorted and then fed back to the network side device.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 600 and various circuits of memory represented by memory 620.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 610 can be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium.
  • the user interface 630 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.
  • the processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 can store data used by the processor 600 in performing operations.
  • the method for measuring state information and the method for feedback of state information are also provided in the embodiment of the present application. Since the principle of solving the problem is similar to the system for measuring state information in the embodiment of the present application, the implementation of the method may be See the implementation of the system, and the repetitions are not repeated here.
  • the method for measuring channel state information in the seventh embodiment of the present application includes:
  • Step 701 The network side device sends a beamforming group of reference signals to the user equipment, so that the user equipment measures the reference signal, where each reference signal of the group of reference signals corresponds to a space in the sector;
  • Step 702 The network side device determines, according to the information fed back by the user equipment, whether to adjust the shaping manner of the reference signal.
  • each reference signal in one sector corresponds to a different channel state information measurement reference signal CSI-RS configuration and/or a different CSI-RS port.
  • each reference signal in a sector corresponds to a different identification.
  • the network side device determines, according to the information fed back by the user equipment, whether to adjust the shaping manner of the reference signal, including:
  • the network side device determines the quality information corresponding to each reference signal according to the identifier and quality information fed back by the user equipment;
  • the network side device determines whether to adjust the shaping mode of the reference signal according to the quality information corresponding to each reference signal.
  • the network side device determines, according to the information fed back by the user equipment, whether to adjust the shaping manner of the reference signal, and further includes:
  • the network side device determines each space in the space corresponding to the reference signal with the best quality information
  • the network side device adjusts the shaping manner of the reference signal corresponding to each space, and determines the reference signal corresponding to each space as a set of reference signals, and returns a group of reference signals that are beamformed to the user equipment. A step of.
  • the reference signal is a channel state information measurement reference signal CSI-RS.
  • each reference signal in one sector corresponds to a different CSI-RS configuration and/or a different CSI-RS end. mouth.
  • a group of CSI-RSs is a partial CSI-RS in a CSI-RS broadcast by the network side device;
  • the CSI-RSs of different user equipments are partially or completely the same.
  • the method further includes:
  • the network side device determines different reference signals through part or all of the time domain, the frequency domain, and the code domain.
  • the method for measuring eight-channel state information in the embodiment of the present application includes:
  • Step 801 The user equipment measures the received beamforming group of reference signals from the network side device, where each reference signal of the group of reference signals corresponds to a space in the sector;
  • Step 802 The user equipment feeds back information to the network side device according to the measurement result, so that the network side device determines, according to the feedback information, whether to adjust the shaping manner of the reference signal.
  • the information that the user equipment feeds back to the network side device according to the measurement result includes:
  • the user equipment feeds back the identifier of the reference signal and the corresponding quality information of the measurement to the network side device.
  • the information that the user equipment user equipment feeds back to the network side device according to the measurement result includes:
  • the user equipment sorts the identifier of each reference signal and the corresponding quality information according to the channel quality corresponding to the reference signal, and then feeds back to the network side device.
  • the network side device sends a beamforming shaped reference signal to the user equipment, and determines whether to adjust the shaping mode of the reference signal according to the information fed back by the user equipment, thereby ensuring Massive MIMO.
  • the overhead of downlink reference signal measurement and feedback is reduced; resource utilization and system performance are improved.
  • embodiments of the present application can be provided as a method, system, or computer program product.
  • the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware.
  • the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • These computer program instructions can also be stored in a particular computer capable of booting a computer or other programmable data processing device In a computer readable memory that operates in a computer readable memory, causing instructions stored in the computer readable memory to produce an article of manufacture comprising instruction means implemented in a block or in a flow or a flow diagram and/or block diagram of the flowchart The functions specified in the boxes.
  • 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.

Abstract

本申请实施例涉及无线通信技术领域，特别涉及一种信道状态信息测量的方法、系统及设备，用以解决现有技术中存在的在发挥Massive MIMO的性能优势的前提下，目前基于下行参考信号测量以及反馈CSI的机制会带来显著的时频资源开销的问题。本申请实施例提供的一种信道状态信息测量的方法，包括：网络侧设备向用户设备发送经过波束赋形的一组参考信号，以使用户设备对参考信号进行测量，其中一组参考信号中的每个参考信号对应扇区中的一个空间；网络侧设备根据用户设备反馈的信息，判断是否调整参考信号的赋形方式。采用本申请实施例的方案在保证Massive MIMO的性能优势的前提下，减小下行参考信号测量以及反馈带来的开销。

Description

一种信道状态信息测量的方法、系统及设备
本申请要求在2014年4月23日提交中国专利局、申请号为201410166094.X、发明名称为“一种信道状态信息测量的方法、系统及设备”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
本申请涉及无线通信技术领域，特别涉及一种信道状态信息测量的方法、系统及设备。
背景技术
鉴于MIMO(Multiple Input Multiple Output，多入多出)技术对于提高峰值速率与系统频谱利用率的重要作用，LTE(Long Term Evolution，长期演进)/LTE-A(LTE-Advanced，长期演进升级)等无线接入技术标准都是以MIMO+OFDM(Orthogonal Frequency Division Multiplexing)技术为基础构建起来的。MIMO技术的性能增益来自于多天线系统所能获得的空间自由度，因此MIMO技术在标准化发展过程中的一个最重要的演进方向便是维度的扩展。在LTE Rel(版本)-8中，最多可以支持4层的MIMO传输。Rel-9重点对MU-MIMO技术进行了增强，TM(Transmission Mode，传输模式)-8的MU-MIMO(Multiple-user MIMO，多用户多输入多输出)传输中最多可以支持4个下行数据层。Rel-10则通过8端口CSI-RS(Channel State Information Reference Signal，信道状态信息测量参考信号)、DMRS(Demodulation Reference Symbol，解调参考符号)与多颗粒度码本的引入进一步提高了信道状态信息的空间分辨率，并进一步将SU-MIMO(Single-User MIMO)的传输能力扩展至最多8个数据层。
在上述基础之上，随着AAS(Active Antenna System，有源天线系统)技术的成熟与二维平面AAS阵列的应用，产业界正在进一步地将MIMO技术向着三维化和大规模化的方向推进。目前，3GPP(3rd Generation Partnership Project，第三代移动通信标准化组织)正在开展3D信道建模的研究项目，其后预计还将继续开展8个天线端口及以下的EBF(elevation Beamforming，仰角波束形成)与超过8个端口(如16、32或64)的FD-MIMO(Full Dimension MIMO，全维多输入多输出)技术研究与标准化工作。而学术界则更为前瞻地开展了针对基于更大规模天线阵列(包含一百或数百根甚至更多阵子)的MIMO技术的研究与测试工作。学术研究与初步的信道实测结果表明，Massive(大量)MIMO技术将能够极大地提升系统频带利用效率，支持更大数量的接入用户。因此各大研究组织均将Massive MIMO技术视为下一代移动通信系统中最有潜力的物理层技术之一。
MIMO技术中，尤其是对MU-MIMO技术而言，网络侧能够获得的信道状态信息精度将直接决定预编码/波束赋形的精度与调度算法的效能，从而影响到整体系统性能。因此，信道状态信息的获取一直是MIMO技术标准化中最核心的问题之一。对于FDD(Frequency division duplex，频分双工)系统而言，由于上下行链路之间存在较大的频率间隔，一般很难直接通过对上行信道的测量获取下行信道状态信息，所以现有的FDD系统一般采用基于下行参考信号测量以及反馈CSI的机制。这种情况下，信道状态信息的空间分辨率直接取决于参考信号的端口数量。当天线阵列规模很大时，如果为了保证下行而引入新的参考信号端口，将会带来显著的时频资源开销。但是如果限制参考信号端口数，又不能保证下行信道状态信息测量的空间分辨率，从而无法发挥Massive MIMO的性能优势。
综上所述，在发挥Massive MIMO的性能优势的前提下，目前基于下行参考信号测量以及反馈CSI的机制会带来显著的时频资源开销。
发明内容
本申请提供一种信道状态信息测量的方法、系统及设备，用以解决现有技术中存在的在发挥Massive MIMO的性能优势的前提下，目前基于下行参考信号测量以及反馈CSI的机制会带来显著的时频资源开销的问题。
本申请实施例提供的一种信道状态信息测量的方法，包括：
网络侧设备向用户设备发送经过波束赋形的一组参考信号，以使所述用户设备对参考信号进行测量，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
所述网络侧设备根据所述用户设备反馈的信息，判断是否调整参考信号的赋形方式。
较佳地，一个扇区中的每个参考信号对应一个不同的标识。
较佳地，所述网络侧设备根据所述用户设备反馈的信息，判断是否调整参考信号的赋形方式，包括：
所述网络侧设备根据所述用户设备反馈的标识和质量信息，确定每个参考信号对应的质量信息；
所述网络侧设备根据每个参考信号对应的质量信息，判断是否调整参考信号的赋形方式。
较佳地，所述网络侧设备根据所述用户设备反馈的信息，判断是否调整参考信号的赋形方式之后，还包括：
若确定需要调整参考信号的赋形方式后，所述网络侧设备确定位于质量信息最好的参考信号对应的空间中的每个空间；
所述网路侧设备调整确定的每个空间对应的参考信号的赋形方式，将确定的每个空间 对应的参考信号作为一组参考信号，并返回向用户设备发送经过波束赋形的一组参考信号的步骤。
较佳地，所述参考信号为信道状态信息测量参考信号CSI-RS。
较佳地，一个扇区中的每个参考信号对应不同的CSI-RS配置和/或不同的CSI-RS端口。
较佳地，所述一组CSI-RS为所述网络侧设备广播的CSI-RS中的部分CSI-RS；
不同的用户设备的CSI-RS部分或全部相同。
较佳地，所述网络侧设备向用户设备发送经过波束赋形的一组参考信号之前，还包括：
所述网络侧设备通过时域、频域和码域中的部分或全部，确定不同的参考信号。
较佳地，不同的参考信号之间具有正交性。
本申请实施例提供的另一种信道状态信息测量的方法，包括：
用户设备测量收到的来自网络侧设备的经过波束赋形的一组参考信号，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
所述用户设备根据测量结果向所述网络侧设备反馈信息，以使所述网络侧设备根据反馈的信息判断是否调整参考信号的赋形方式。
较佳地，所述用户设备根据测量结果向所述网络侧设备反馈信息，包括：
所述用户设备向所述网络侧设备反馈进行测量的参考信号的标识和对应的质量信息。
较佳地，所述用户设备根据测量结果向所述网络侧设备反馈信息，包括：
所述用户设备按照参考信号对应的信道质量，对每个参考信号的标识和对应的质量信息进行排序后向所述网络侧设备反馈。
本申请实施例提供的一种信道状态信息测量的网络侧设备，包括：
发送模块，用于向用户设备发送经过波束赋形的一组参考信号，以使所述用户设备对参考信号进行测量，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
处理模块，用于根据所述用户设备反馈的信息，判断是否调整参考信号的赋形方式。
较佳地，一个扇区中的每个参考信号对应一个不同的标识。
较佳地，所述处理模块具体用于：
根据所述用户设备反馈的标识和质量信息，确定每个参考信号对应的质量信息；根据每个参考信号对应的质量信息，判断是否调整参考信号的赋形方式。
较佳地，所述处理模块还用于：
若确定需要调整参考信号的赋形方式后，设备确定位于质量信息最好的参考信号对应的空间中的每个空间；调整确定的每个空间对应的参考信号的赋形方式，将确定的每个空间对应的参考信号作为一组参考信号，并返回向用户设备发送经过波束赋形的一组参考信号的步骤。
较佳地，所述参考信号为信道状态信息测量参考信号CSI-RS。
较佳地，一个扇区中的每个参考信号对应不同的CSI-RS配置和/或不同的CSI-RS端口。
较佳地，所述一组CSI-RS为所述网络侧设备广播的CSI-RS中的部分CSI-RS；
不同的用户设备的CSI-RS部分或全部相同。
较佳地，所述发送模块还用于：
通过时域、频域和码域中的部分或全部，确定不同的参考信号。
较佳地，不同的参考信号之间具有正交性。
本申请实施例提供的一种信道状态信息测量的用户设备，包括：
测量模块，用于测量收到的来自网络侧设备的经过波束赋形的一组参考信号，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
反馈模块，用于根据测量结果向所述网络侧设备反馈信息，以使所述网络侧设备根据反馈的信息判断是否调整参考信号的赋形方式。
较佳地，所述反馈模块具体用于：
向所述网络侧设备反馈进行测量的参考信号的标识和对应的质量信息。
较佳地，所述反馈模块具体用于：
按照参考信号对应的信道质量，对每个参考信号的标识和对应的质量信息进行排序后向所述网络侧设备反馈。
本申请实施例提供的一种信道状态信息测量的系统，包括：
网络侧设备，用于向用户设备发送经过波束赋形的一组参考信号，以使所述用户设备对参考信号进行测量，其中一组参考信号中的每个参考信号对应扇区中的一个空间；根据所述用户设备反馈的信息，判断是否调整参考信号的赋形方式；
用户设备，用于测量收到的来自网络侧设备的经过波束赋形的一组参考信号，其中一组参考信号中的每个参考信号对应扇区中的一个空间；根据测量结果向所述网络侧设备反馈信息，以使所述网络侧设备根据反馈的信息判断是否调整参考信号的赋形方式。
本申请实施例网络侧设备向用户设备发送经过波束赋形的一组参考信号，根据所述用户设备反馈的信息，判断是否调整参考信号的赋形方式，由于本申请实施例通过用户反馈的针对经过波束赋形的参考信息的信息判断是否调整参考信号的赋形方式，达到了进行信道状态信息测量的目的，并且采用经过赋形的参考信号，所需的参考信号数量对应于波束的数量，而不是天线的数量，所以反馈开销不会随着天线数量的增加而无限制地增长，从而在保证Massive MIMO的性能优势的前提下，减小了下行参考信号测量以及反馈带来的开销；提高了资源利用率和系统性能。
附图说明
图1为本申请实施例一信道状态信息测量的系统结构示意图；
图2为本申请实施例二参考信号波束组搜索示意图；
图3为本申请实施例三信道状态信息测量的系统中网络侧设备的结构示意图；
图4为本申请实施例四信道状态信息测量的系统中用户设备的结构示意图；
图5为本申请实施例五信道状态信息测量的系统中网络侧设备的结构示意图；
图6为本申请实施例六信道状态信息测量的系统中用户设备的结构示意图；
图7为本申请实施例七信道状态信息测量的方法流程示意图；
图8为本申请实施例八信道状态信息测量的方法流程示意图。
具体实施方式
本申请实施例网络侧设备向用户设备发送经过波束赋形的一组参考信号，根据用户设备反馈的信息，判断是否调整参考信号的赋形方式，这样可以使网络侧设备粗略判断信道的变化情况，如果信道变化缓慢，基站可以指示UE进一步以更为精细的方式测量并反馈信息，从而在保证Massive MIMO的性能优势的前提下，减小了下行参考信号测量以及反馈带来的开销；提高了资源利用率和系统性能。
下面结合说明书附图对本申请实施例作进一步详细描述。
如图1所示，本申请实施例一信道状态信息测量的系统包括：网络侧设备10和用户设备11。
网络侧设备10，用于向用户设备11发送经过波束赋形的一组参考信号，以使用户设备11对参考信号进行测量，其中一组参考信号中的每个参考信号对应扇区中的一个空间；根据用户设备反馈的信息，判断是否调整参考信号的赋形方式；
用户设备11，用于测量收到的来自网络侧设备10的经过波束赋形的一组参考信号，其中一组参考信号中的每个参考信号对应扇区中的一个空间；根据测量结果向网络侧设备反馈的信息，以使网络侧设备10根据反馈的信息判断是否调整参考信号的赋形方式。
其中，本申请实施例将一个扇区分成多个空间，每个空间可以再根据需要进一步细化成多个空间，根据需要还可以对已经细化的空间进一步细化成多个空间，以此类推，这样就形成了不同空间分辨率的情况。比如将120度划分成4个空间，一个空间为30度，然后可以将30度细化成3个空间，每个空间10度，还可以将10度进一步细化。
其中，本申请实施例通过多个波束将扇区进行划分。
在实施中，网络侧设备通过时域、频域和码域中的部分或全部，确定不同的参考信号。
较佳地，对于不同的参考信号之间具有正交性。
在划分时，通过赋形权值加权可以使多天线系统产生特定波束，也就是说，赋形权值决定了波束的指向与形状。
下面列举确定赋形权值的方法：
例如可以在水平维和垂直维分别设置H和V个波束，则对于包含NH和NV个水平与垂直端口的二维平面阵列而言，第[nh,nv]个波束的赋形权值可以表示为：
Figure PCTCN2015077170-appb-000001
其中，
Figure PCTCN2015077170-appb-000002
表示矩阵的Kronecker积，(·)T表示矩阵的转置。
Figure PCTCN2015077170-appb-000003
及
Figure PCTCN2015077170-appb-000004
分别表示第[nh,nv]个波束的水平和垂直角度，△H和△V分别表示各相邻波束间的最小水平及垂直角度差。
针对空间和参考信号的关系，一种较佳地方式是采用多级树形结构的波束组实现空间分辨率的逐层提高。如图2所示，可以首先设计分辨率最高的一级参考信号波束组(每个元素对应于数形结构的叶子节点)，然后将其分成若干子组，并为每个子组选择一个参考信号波束作为其树根(每个子组+其树根节点构成一颗子树)。每个子树的树根又可作为上一级(空间分辨率较低)的子树的叶子节点，依此类推形成多级树形结构。
对于用户设备不需要获知当前需要进行测量的空间分辨率，只需要根据网络侧设备的指示对一组参考信号进行测量以及反馈即可。
一组参考信号中的每个参考信号对应扇区中的一个空间，而不同组的参考信号对应的空间大小可以不同，比如参考信号A对应一个扇区分成的多个空间中的一个，参考信号B对应一个空间经过细化后的空间中的一个。
在实施中，为了区分不同参考信号对应的反馈信息，可以为每个参考信号分配一个标识。由于在发送反馈信息时是以组为单位，所以只需要保证一个扇区中的每个参考信号对应一个不同的标识即可。
其中，参考信号的数量及区分方式可以事先约定或通过信令指示。
较佳地，参考信号为CSI-RS。
具体的，网络侧设备给用户设备发送的是一组带有波束赋形的CSI-RS，该组带有波束赋形的CSI-RS可以是广播中的一个子组，子组间可部分重叠，不同用户的波束分辨率也可不同。
每个参考信号对应于不同的CSI-RS配置和/或不同的CSI-RS端口。
相应的，用户设备根据测量结果向网络侧设备反馈的信息时，向网络侧设备反馈进行 测量的参考信号的标识和对应的质量信息。
这里的质量信息包括但并限于下列信息中的部分或全部：
CQI(Channel Quality Indicator，信道质量标识)、TBS(Transport Block Size，传输块容量)。
在实施中，用户设备记录信道质量最好的参考信号的ID；向网络侧设备反馈时，可以标记出最好的参考信号对应的ID。
较佳地，用户设备按照参考信号对应的信道质量，对每个参考信号的标识和对应的质量信息进行排序后向网络侧设备反馈。
比如参考信号A、B和C中，信号质量最好的为A，其次是C，最差的是B，则反馈信息中信号质量的排序就是参考信号A、参考信号C和参考信号B，或者参考信号B、参考信号C和参考信号A。
其中，网络侧设备根据用户设备反馈的信息，判断是否调整参考信号的赋形方式时，根据用户设备反馈的标识和质量信息，确定每个参考信号对应的质量信息；根据每个参考信号对应的质量信息，判断是否调整参考信号的赋形方式。
具体的，网络侧设备可以根据收到的质量信息，确定时间窗口中的信道变化情况或反馈N次对应的信道质量的变化情况或多个用户设备的信道质量判断是否进一步调整参考信号的赋形方式。
判断的方式有很多，比如可以根据用户设备上报的信息，查看在一定时间范围内的变动量是否超过某个预设的门限值，如果超过，则认为信道不稳定，需要调整，否则认为不需要调整。
还比如：网络侧设备可以根据用户设备上报的信息判断信道的变化快慢，如果信道的变化快超过一定范围，则认为信道不稳定，需要调整，否则认为不需要调整。
如果确定需要调整，一种较佳地方式是网络侧设备确定位于质量信息最好的参考信号对应的空间中的每个空间，将确定的每个空间对应的参考信号作为一组参考信号，并返回向用户设备发送经过波束赋形的一组参考信号的步骤。
在实施中，调整波束赋形的方法可以参考下列公式：
假定需要在第[nh,nv]个波束的基础上进一步细化出2M和2N个波束，则第[m,n]个波束可以表示为：
Figure PCTCN2015077170-appb-000005
其中
Figure PCTCN2015077170-appb-000006
与
Figure PCTCN2015077170-appb-000007
分别表示第 [m,n]个波的水平和垂直角度，△H1和△V1分别表示细化之后各相邻波束间的最小水平及垂直角度差。
在实施中，网络侧设备确定位于质量信息最好的参考信号对应的空间中的每个空间后，还可以根据信息判断信道的变化快慢程度，判断是否还需要进一步划分空间，比如判断信道的变化是否过快(一段时间内最高值和最低值之间的差距是否超过一设定门限值)，如果信道的变化过快，还可以对划分后的每个空间进一步进行划分，得到多个空间，然后将最后一次确定的每个空间对应的参考信号作为一组参考信号，并返回向用户设备发送经过波束赋形的一组参考信号的步骤。
网络侧设备确定位于质量信息最好的参考信号对应的空间中的每个空间时，如果对质量信息最好的参考信号对应的空间没有进行划分，则可以先对质量信息最好的参考信号对应的空间进行划分得到多个空间，然后确定得到的每个空间；如果预先对质量信息最好的参考信号对应的空间进行划分，可以直接确定位于质量信息最好的参考信号对应的空间中的每个空间。
上述内容可以看出，如果需要调整，一种较佳地方式是：向用户设备发送空间分辨率更高的参考信号。具体可以参见图2。对于网络侧设备可以首先在当前的参考信号波束组中按照相对较低的分辨率进行搜索，当选中某个子树之后(如图2中首先确定节点A)，可以进一步用这一子树的叶子节点作为下次迭代时的参考信号组。如果在当前分辨率级别的子树中认为叶子节点B对应的参考信号能够获得最佳信道质量(即不需要调整)，则可以进一步用节点B确定的参考信号组辅助终端进行波束选择与上报。
一个子组对应一个用户设备，每个子组包含若干波束。子组间可部分重叠或完全重叠。若子组完全重叠意味着对应的多个UE需要测量的波束组是相同的。
其中，本申请实施例的网络侧设备可以是基站(比如宏基站、家庭基站等)，也可以是RNC(无线网络控制器)或其他网络侧设备，也可以是新的网络侧设备。
如图3所示，本申请实施例三信道状态信息测量的系统中的网络侧设备包括：
发送模块300，用于向用户设备发送经过波束赋形的一组参考信号，以使用户设备对参考信号进行测量，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
处理模块310，用于根据用户设备反馈的信息，判断是否调整参考信号的赋形方式。
较佳地，一个扇区中的每个参考信号对应一个不同的标识。
较佳地，处理模块具体用于：
根据用户设备反馈的标识和质量信息，确定每个参考信号对应的质量信息；根据每个参考信号对应的质量信息，判断是否调整参考信号的赋形方式。
较佳地，处理模块还用于：
若确定需要调整参考信号的赋形方式后，设备确定位于质量信息最好的参考信号对应的空间中的每个空间；调整确定的每个空间对应的参考信号的赋形方式，将确定的每个空间对应的参考信号作为一组参考信号，并返回向用户设备发送经过波束赋形的一组参考信号的步骤。
较佳地，所述参考信号为信道状态信息测量参考信号CSI-RS。
较佳地，一个扇区中的每个参考信号对应不同的CSI-RS配置和/或不同的CSI-RS端口。
较佳地，所述一组CSI-RS为所述网络侧设备广播的CSI-RS中的部分CSI-RS；
不同的用户设备的CSI-RS部分或全部相同。
较佳地，发送模块300还用于：
通过时域、频域和码域中的部分或全部，确定不同的参考信号。
较佳地，不同的参考信号之间具有正交性。
如图4所示，本申请实施例四信道状态信息测量的系统中的用户设备包括：
测量模块400，用于测量收到的来自网络侧设备的经过波束赋形的一组参考信号，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
反馈模块410，用于根据测量结果向网络侧设备反馈信息，以使网络侧设备根据反馈的信息判断是否调整参考信号的赋形方式。
较佳地，反馈模块410具体用于：
向网络侧设备反馈进行测量的参考信号的标识和对应的质量信息。
较佳地，反馈模块410具体用于：
按照参考信号对应的信道质量，对每个参考信号的标识和对应的质量信息进行排序后向网络侧设备反馈。
如图5所示，本申请实施例五信道状态信息测量的系统中的网络侧设备，包括：
处理器500，用于通过收发机510向用户设备发送经过波束赋形的一组参考信号，以使用户设备对参考信号进行测量，其中一组参考信号中的每个参考信号对应扇区中的一个空间；根据用户设备反馈的信息，判断是否调整参考信号的赋形方式；
收发机510，用于在处理器500的控制下接收和发送数据。
较佳地，一个扇区中的每个参考信号对应不同的信道状态信息测量参考信号CSI-RS配置和/或不同的CSI-RS端口。
较佳地，一个扇区中的每个参考信号对应一个不同的标识。
较佳地，处理器500具体用于：
根据用户设备反馈的标识和质量信息，确定每个参考信号对应的质量信息；根据每个参考信号对应的质量信息，判断是否调整参考信号的赋形方式。
较佳地，处理器500还用于：
若确定需要调整参考信号的赋形方式后，设备确定位于质量信息最好的参考信号对应的空间中的每个空间；调整确定的每个空间对应的参考信号的赋形方式，将确定的每个空间对应的参考信号作为一组参考信号，并返回向用户设备发送经过波束赋形的一组参考信号的步骤。
较佳地，所述参考信号为信道状态信息测量参考信号CSI-RS。
较佳地，一个扇区中的每个参考信号对应不同的CSI-RS配置和/或不同的CSI-RS端口。
较佳地，所述一组CSI-RS为所述网络侧设备广播的CSI-RS中的部分CSI-RS；
不同的用户设备的CSI-RS部分或全部相同。
较佳地，处理器500还用于：
通过时域、频域和码域中的部分或全部，确定不同的参考信号。
较佳地，不同的参考信号之间具有正交性。
其中，在图5中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器500代表的一个或多个处理器和存储器520代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机510可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。处理器500负责管理总线架构和通常的处理，存储器520可以存储处理器500在执行操作时所使用的数据。
处理器500负责管理总线架构和通常的处理，存储器520可以存储处理器500在执行操作时所使用的数据。
如图6所示，本申请实施例六信道状态信息测量的系统中的用户设备包括：
处理器600，用于通过收发机610测量收到的来自网络侧设备的经过波束赋形的一组参考信号，其中一组参考信号中的每个参考信号对应扇区中的一个空间；根据测量结果通过收发机610向网络侧设备反馈信息，以使网络侧设备根据反馈的信息判断是否调整参考信号的赋形方式；
收发机610，用于在处理器600的控制下接收和发送数据。
较佳地，处理器600具体用于：
向网络侧设备反馈进行测量的参考信号的标识和对应的质量信息。
较佳地，处理器600具体用于：
按照参考信号对应的信道质量，对每个参考信号的标识和对应的质量信息进行排序后向网络侧设备反馈。
其中，在图6中，总线架构可以包括任意数量的互联的总线和桥，具体由处理器600代表的一个或多个处理器和存储器620代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。收发机610可以是多个元件，即包括发送机和接收机，提供用于在传输介质上与各种其他装置通信的单元。针对不同的用户设备，用户接口630还可以是能够外接内接需要设备的接口，连接的设备包括但不限于小键盘、显示器、扬声器、麦克风、操纵杆等。
处理器600负责管理总线架构和通常的处理，存储器620可以存储处理器600在执行操作时所使用的数据。
基于同一发明构思，本申请实施例中还提供了状态信息测量的方法和状态信息反馈的方法，由于这些方法解决问题的原理与本申请实施例状态信息测量的系统相似，因此这些方法的实施可以参见系统的实施，重复之处不再赘述。
如图7所示，本申请实施例七信道状态信息测量的方法包括：
步骤701、网络侧设备向用户设备发送经过波束赋形的一组参考信号，以使用户设备对参考信号进行测量，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
步骤702、网络侧设备根据用户设备反馈的信息，判断是否调整参考信号的赋形方式。
较佳地，一个扇区中的每个参考信号对应不同的信道状态信息测量参考信号CSI-RS配置和/或不同的CSI-RS端口。
较佳地，一个扇区中的每个参考信号对应一个不同的标识。
较佳地，网络侧设备根据用户设备反馈的信息，判断是否调整参考信号的赋形方式，包括：
网络侧设备根据用户设备反馈的标识和质量信息，确定每个参考信号对应的质量信息；
网络侧设备根据每个参考信号对应的质量信息，判断是否调整参考信号的赋形方式。
较佳地，网络侧设备根据用户设备反馈的信息，判断是否调整参考信号的赋形方式之后，还包括：
若确定需要调整参考信号的赋形方式后，网络侧设备确定位于质量信息最好的参考信号对应的空间中的每个空间；
网路侧设备调整确定的每个空间对应的参考信号的赋形方式，将确定的每个空间对应的参考信号作为一组参考信号，并返回向用户设备发送经过波束赋形的一组参考信号的步骤。
较佳地，参考信号为信道状态信息测量参考信号CSI-RS。
较佳地，一个扇区中的每个参考信号对应不同的CSI-RS配置和/或不同的CSI-RS端 口。
较佳地，一组CSI-RS为网络侧设备广播的CSI-RS中的部分CSI-RS；
不同的用户设备的CSI-RS部分或全部相同。
较佳地，网络侧设备向用户设备发送经过波束赋形的一组参考信号之前，还包括：
网络侧设备通过时域、频域和码域中的部分或全部，确定不同的参考信号。
较佳地，不同的参考信号之间具有正交性。
如图8所示，本申请实施例八信道状态信息测量的方法包括：
步骤801、用户设备测量收到的来自网络侧设备的经过波束赋形的一组参考信号，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
步骤802、用户设备根据测量结果向网络侧设备反馈信息，以使网络侧设备根据反馈的信息判断是否调整参考信号的赋形方式。
较佳地，用户设备根据测量结果向网络侧设备反馈的信息，包括：
用户设备向网络侧设备反馈进行测量的参考信号的标识和对应的质量信息。
较佳地，用户设备用户设备根据测量结果向网络侧设备反馈的信息，包括：
用户设备按照参考信号对应的信道质量，对每个参考信号的标识和对应的质量信息进行排序后向网络侧设备反馈。
从上述内容可以看出：本申请实施例网络侧设备向用户设备发送经过波束赋形的一组参考信号，根据用户设备反馈的信息，判断是否调整参考信号的赋形方式，从而在保证Massive MIMO的性能优势的前提下，减小了下行参考信号测量以及反馈带来的开销；提高了资源利用率和系统性能。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请实施例的方法、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。
尽管已描述了本申请的优选实施例，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申请范围的所有变更和修改。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (25)

  1. 一种信道状态信息测量的方法，其特征在于，该方法包括：
    网络侧设备向用户设备发送经过波束赋形的一组参考信号，以使所述用户设备对参考信号进行测量，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
    所述网络侧设备根据所述用户设备反馈的信息，判断是否调整参考信号的赋形方式。
  2. 如权利要求1所述的方法，其特征在于，一个扇区中的每个参考信号对应一个不同的标识。
  3. 如权利要求2所述的方法，其特征在于，所述网络侧设备根据所述用户设备反馈的信息，判断是否调整参考信号的赋形方式，包括：
    所述网络侧设备根据所述用户设备反馈的标识和质量信息，确定每个参考信号对应的质量信息；
    所述网络侧设备根据每个参考信号对应的质量信息，判断是否调整参考信号的赋形方式。
  4. 如权利要求1所述的方法，其特征在于，所述网络侧设备根据所述用户设备反馈的信息，判断是否调整参考信号的赋形方式之后，还包括：
    若确定需要调整参考信号的赋形方式后，所述网络侧设备确定位于质量信息最好的参考信号对应的空间中的每个空间；
    所述网路侧设备调整确定的每个空间对应的参考信号的赋形方式，将确定的每个空间对应的参考信号作为一组参考信号，并返回向用户设备发送经过波束赋形的一组参考信号的步骤。
  5. 如权利要求1～4任一所述的方法，其特征在于，所述参考信号为信道状态信息测量参考信号CSI-RS。
  6. 如权利要求5所述的方法，其特征在于，一个扇区中的每个参考信号对应不同的CSI-RS配置和/或不同的CSI-RS端口。
  7. 如权利要求5所述的方法，其特征在于，所述一组CSI-RS为所述网络侧设备广播的CSI-RS中的部分CSI-RS；
    不同的用户设备的CSI-RS部分或全部相同。
  8. 如权利要求1～4任一所述的方法，其特征在于，所述网络侧设备向用户设备发送经过波束赋形的一组参考信号之前，还包括：
    所述网络侧设备通过时域、频域和码域中的部分或全部，确定不同的参考信号。
  9. 如权利要求1～4任一所述的方法，其特征在于，不同的参考信号之间具有正交性。
  10. 一种信道状态信息测量的方法，其特征在于，该方法包括：
    用户设备测量收到的来自网络侧设备的经过波束赋形的一组参考信号，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
    所述用户设备根据测量结果向所述网络侧设备反馈信息，以使所述网络侧设备根据反馈的信息判断是否调整参考信号的赋形方式。
  11. 如权利要求10所述的方法，其特征在于，所述用户设备根据测量结果向所述网络侧设备反馈信息，包括：
    所述用户设备向所述网络侧设备反馈进行测量的参考信号的标识和对应的质量信息。
  12. 如权利要求11所述的方法，其特征在于，所述用户设备所述用户设备根据测量结果向所述网络侧设备反馈信息，包括：
    所述用户设备按照参考信号对应的信道质量，对每个参考信号的标识和对应的质量信息进行排序后向所述网络侧设备反馈。
  13. 一种信道状态信息测量的网络侧设备，其特征在于，该网络侧设备包括：
    发送模块，用于向用户设备发送经过波束赋形的一组参考信号，以使所述用户设备对参考信号进行测量，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
    处理模块，用于根据所述用户设备反馈的信息，判断是否调整参考信号的赋形方式。
  14. 如权利要求12所述的网络侧设备，其特征在于，一个扇区中的每个参考信号对应一个不同的标识。
  15. 如权利要求13所述的网络侧设备，其特征在于，所述处理模块具体用于：
    根据所述用户设备反馈的标识和质量信息，确定每个参考信号对应的质量信息；根据每个参考信号对应的质量信息，判断是否调整参考信号的赋形方式。
  16. 如权利要求12所述的网络侧设备，其特征在于，所述处理模块还用于：
    若确定需要调整参考信号的赋形方式后，设备确定位于质量信息最好的参考信号对应的空间中的每个空间；调整确定的每个空间对应的参考信号的赋形方式，将确定的每个空间对应的参考信号作为一组参考信号，并返回向用户设备发送经过波束赋形的一组参考信号的步骤。
  17. 如权利要求12～16任一所述的网络侧设备，其特征在于，所述参考信号为信道状态信息测量参考信号CSI-RS。
  18. 如权利要求17所述的网络侧设备，其特征在于，一个扇区中的每个参考信号对应不同的CSI-RS配置和/或不同的CSI-RS端口。
  19. 如权利要求17所述的网络侧设备，其特征在于，所述一组CSI-RS为所述网络侧设备广播的CSI-RS中的部分CSI-RS；
    不同的用户设备的CSI-RS部分或全部相同。
  20. 如权利要求12～16任一所述的网络侧设备，其特征在于，所述发送模块还用于：
    通过时域、频域和码域中的部分或全部，确定不同的参考信号。
  21. 如权利要求12～16任一所述的网络侧设备，其特征在于，不同的参考信号之间具有正交性。
  22. 一种信道状态信息测量的用户设备，其特征在于，该用户设备包括：
    测量模块，用于测量收到的来自网络侧设备的经过波束赋形的一组参考信号，其中一组参考信号中的每个参考信号对应扇区中的一个空间；
    反馈模块，用于根据测量结果向所述网络侧设备反馈信息，以使所述网络侧设备根据反馈的信息判断是否调整参考信号的赋形方式。
  23. 如权利要求22所述的用户设备，其特征在于，所述反馈模块具体用于：
    向所述网络侧设备反馈进行测量的参考信号的标识和对应的质量信息。
  24. 如权利要求23所述的用户设备，其特征在于，所述反馈模块具体用于：
    按照参考信号对应的信道质量，对每个参考信号的标识和对应的质量信息进行排序后向所述网络侧设备反馈。
  25. 一种信道状态信息测量的系统，其特征在于，该系统包括：
    网络侧设备，用于向用户设备发送经过波束赋形的一组参考信号，以使所述用户设备对参考信号进行测量，其中一组参考信号中的每个参考信号对应扇区中的一个空间；根据所述用户设备反馈的信息，判断是否调整参考信号的赋形方式；
    用户设备，用于测量收到的来自网络侧设备的经过波束赋形的一组参考信号，其中一组参考信号中的每个参考信号对应扇区中的一个空间；根据测量结果向所述网络侧设备反馈信息，以使所述网络侧设备根据反馈的信息判断是否调整参考信号的赋形方式。
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