WO2011137752A1 - 一种基于pusch上报csi的方法及装置 - Google Patents

一种基于pusch上报csi的方法及装置 Download PDF

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WO2011137752A1
WO2011137752A1 PCT/CN2011/073717 CN2011073717W WO2011137752A1 WO 2011137752 A1 WO2011137752 A1 WO 2011137752A1 CN 2011073717 W CN2011073717 W CN 2011073717W WO 2011137752 A1 WO2011137752 A1 WO 2011137752A1
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csi
pmi
reporting
full bandwidth
subset
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PCT/CN2011/073717
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English (en)
French (fr)
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苏昕
缪德山
张然然
荆梅芳
高秋彬
孙韶辉
肖国军
拉盖施
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电信科学技术研究院
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Priority to EP11777173.3A priority Critical patent/EP2568646A4/en
Priority to US13/638,586 priority patent/US8982721B2/en
Publication of WO2011137752A1 publication Critical patent/WO2011137752A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • 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
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0634—Antenna weights or vector/matrix coefficients
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • H04L1/0031—Multiple signaling transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03426—Arrangements for removing intersymbol interference characterised by the type of transmission transmission using multiple-input and multiple-output channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03343—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for reporting CSI based on PUSCH. Background technique
  • the base station side can obtain channel state information (CSI), it can optimize the modulation mode, coding rate, and spatial distribution characteristics of the transmitted downlink signal, so that the downlink signal is transmitted. Matching the channel propagation characteristics to achieve enhanced signal reception reliability and reduced complexity of the receiving algorithm.
  • the base station side can perform scheduling decisions based on the CSI obtained, thereby implementing the system spectrum. Improve efficiency and avoid interference between cells.
  • LTE Rel-8/9 specifies that an evolved base station (eNB) can obtain CSI of a downlink channel by using channel reciprocity or feedback from a user equipment (UE), where physical downlink sharing is performed.
  • eNB evolved base station
  • UE user equipment
  • the main transmission modes of the Physical Downlink Shared Channel (PDSCH) use the codebook-based implicit CSI feedback method.
  • PMI Precoding Matrix Indicator
  • the UE measures the downlink based on the Cell-specific Reference Signal (CRS).
  • CRS Cell-specific Reference Signal
  • the channel reports to the eNB the rank indication (RI) and the PMI that the downlink can support to characterize the number of data streams, and also needs to report the channel quality information of each codeword ( CQI); wherein, in the calculation process of CQI, the UE needs to assume that the eNB uses the locally recommended RI/PML
  • the upper layer can configure the UE to use the uplink control channel (Physical Uplink).
  • the Control Channel performs periodic reporting of CSI and/or performs CSI non-period reporting by using the Physical Uplink Shared Channel (PUSCH).
  • PUSCH Physical Uplink Shared Channel
  • Table 1 for the PUSCH, there are five PUSCH reporting modes (also referred to as PUSCH reporting mode), and the PUSCH reporting mode used by the UE is semi-statically configured by the network side higher layer signaling.
  • Each PUSCH reporting mode corresponds to one or more PUSCH reporting types (ie, CQI/PMI feedback type), and the UE constructs a corresponding CSI according to the PUSCH reporting type corresponding to the PUSCH reporting mode specified by the network side, so-called CSI, which may be One or any combination of RI, PMI, and CQI.
  • PUSCH reporting types ie, CQI/PMI feedback type
  • CSI which may be One or any combination of RI, PMI, and CQI.
  • the existing PUSCH reporting mechanism used in LTE Rel-8/9 is designed for a single codebook structure, focusing on a single-user application scenario, and will be targeted at Rel-10 (for LTE-A).
  • the PUSCH reporting mechanism is further optimized to better support multi-user scenarios.
  • a dual-codebook-based PUSCH reporting mechanism is used in Rel-10.
  • CSI is classified into a relatively stable long-term/wideband CSI and a short-term/frequency with high time/frequency selectivity.
  • the UE may quantize the two CSIs by using two codebooks on the PUSCH according to different feedback periods.
  • the existing single-codebook-based CSI reporting mechanism does not distinguish between long-term/wideband CSI and short-term/frequency-selective CSI, so it is not suitable for the dual-codebook-based PUSCH reporting mechanism defined by Rel-10. Therefore, it is required to provide A new PUSCH reporting mechanism to achieve accurate reporting of long-term/wideband CSI and short-term/frequency-selective CSI. Summary of the invention
  • Embodiments of the present invention provide a method and apparatus for reporting CSI based on a PUSCH, which is used to implement accurate CSI based on a dual codebook.
  • a method for reporting channel state information based on an uplink shared channel includes:
  • the first CSI and the second CSI are sent to the network side.
  • An apparatus for reporting channel state information based on an uplink shared channel includes:
  • the first communication unit receives the CSI report mode configuration signaling sent by the network side, and the CSI report mode configuration signaling carries at least the specified report mode identifier;
  • a processing unit configured to set a first CSI for the full bandwidth of the system according to the reporting type corresponding to the reporting mode identifier, and divide the full bandwidth of the system into at least two frequency band subsets, and identify corresponding to the upper four-dimensional mode identifier according to the The reporting type forms a second CSI for the specified subset of frequency bands;
  • the second communication unit is configured to send the first CSI and the second CSI to the network side when receiving the reporting indication signaling sent by the network side.
  • three new reporting modes are added to the PUSCH to support the two-level feedback mode for the dual codebook.
  • the original reporting information is redefined as short-term/frequency selective CSI.
  • the reporting information for long-term/wideband CSI is added, and the newly added long-term/wideband CSI information can be combined with the original short-term/frequency-selective CSI information.
  • Enables UEs to consider long-term/wideband CSI and short-term/frequency selectivity when reporting CSI CSI implements a two-stage feedback mechanism for dual codebooks based on PUSCH.
  • the reported long-term/wideband CSI and short-term/frequency selective CSI include PMI-1 and corresponding CQI under long-term/wideband
  • the corresponding CQI of PMI-2 under short-term/frequency selectivity facilitates SU/MU-MIMO (single-user MIMO and multi-user MIMO handover) operations and corresponding adaptive modulation coding (AMC) processing.
  • FIG. 1 is a flowchart of a method for a UE to report CSI based on a PUSCH according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a function of a UE according to an embodiment of the present invention.
  • a reporting mechanism based on PUSCH for CSI is proposed, which is applicable to the precoding process using a two-level codebook.
  • the UE may report long-term/wideband CSI (including PMI and/or corresponding CQI information) to the network side (eg, eNB) through the PUSCH, and specify a short-term/sub-band of the frequency band subset on the network side through the PUSCH.
  • Frequency selective CSI including PMI and/or corresponding CQI information).
  • a detailed process for a UE to report CSI based on a PUSCH is as follows:
  • Step 100 Receive channel state information sent by the network side CSI report mode configuration signaling, where the CSI report mode configuration signaling carries at least a specified report mode identifier (that is, a report mode identifier corresponding to the report mode that needs to be used).
  • the CSI report mode configuration signaling carries at least a specified report mode identifier (that is, a report mode identifier corresponding to the report mode that needs to be used).
  • Step 110 Set a first CSI for the full bandwidth of the system according to the reporting type corresponding to the reporting mode identifier, and divide the full bandwidth of the system into at least two frequency band subsets, and set the frequency band according to the reporting type corresponding to the reporting mode identifier.
  • the subset specifies the second CSI of the subset of bands.
  • the first CSI and the second CSI respectively include a rank indication RI, a precoding matrix indicating PMI, and One or any combination of channel quality information CQI.
  • the existing PUSCH reporting mode cannot support the two-stage feedback mode for the dual codebook. Therefore, in the embodiment of the present invention, it is proposed to introduce one or more new ones based on the existing PUSCH reporting mode.
  • Report mode The upper layer can configure the Rel-8/9 UE to use the original model-2, 2-0, 2-2, 3-0, 3-1, and the Rel-10 UE is configured to use the new reporting mode.
  • the new reporting mode it is necessary to include reporting information reflecting long-term/wideband CSI and reporting information reflecting short-term/frequency-selective CSI.
  • three new PUSCH reporting modes are given, which are denoted as model-3, 2-3 and 3-3, respectively. In order to support the two-level feedback mode for the dual codebook, it is necessary to introduce at least one of the three new reporting modes.
  • the specified escalation mode identifier can specify any one of model-3, 2-3, and 3-3.
  • the so-called designated frequency band subset may be a divided subset of all frequency bands, or may be a partial frequency band subset, for example, set M frequency band subsets.
  • the frequency band subset may be specified in a preset order; the frequency band subset may also be specified by signaling the number of the frequency band subset when the UE reports.
  • Each subset of frequency bands includes several physical resource blocks (PRBs), several sub-bands, and/or a number of bandwidth parts.
  • PRBs physical resource blocks
  • Step 120 When receiving the reporting indication signaling sent by the network side, send the first CSI and the second CSI to the network side.
  • the first CSI and the second CSI are simultaneously sent to the network side.
  • any of the three new PUSCH reporting modes can be used, which are described in detail below:
  • Wl the structure of the primary codebook
  • the UE may select the corresponding direction of the direction of arrival with the strongest signal power, where the corresponding label of W-1 in the primary codebook is PMI-1. Similar operations in the following embodiments are based on the same principles and will not be described again.
  • the UE obtains PMI-2 for each frequency band subset according to the channel characteristics of each frequency band subset and the UE's own receiving algorithm (the PMI-2 of each frequency band subset may have one or more) as the second CSI; For example, the UE may select W-2 from the secondary codebook according to the downlink channel matrix and the W-1 synthesized equivalent channel HX W-1, so that the transmission signal passes through the synthesized channel H x W-1 X W-2 and the UE. The best signal quality can be obtained after the receiving process, wherein the corresponding label of W-2 in the primary codebook is PMI-2. Similar operations in the following embodiments are based on the same principles and will not be described again.
  • the meanings of the corresponding parameters are explained in the same way, and will not be described again.
  • the UE obtains PMI-1 for the full bandwidth of the system according to the channel characteristics of the full bandwidth of the system and its own receiving algorithm, as the first CSI;
  • the UE selects M frequency band subsets, and obtains PMI-2 for the M frequency band subsets according to channel characteristics on the M frequency band subsets and its own receiving algorithm (each frequency band subset of M frequency bands)
  • the set of PMI-2 may have one or more) as the second CSI;
  • RIx denotes a number less than or equal to R T ( R T represents a threshold of rank), which may be fixed or selected according to a certain rule
  • PMI-2X represents a R T xRIx dimensional precoding matrix, which may be a codebook The choice according to certain rules can also be fixed.
  • the UE obtains PMI-1 for the full bandwidth of the system according to the channel characteristics of the full bandwidth of the system and its own receiving algorithm, as the first CSI;
  • the UE obtains PMI-2 for each frequency band subset as a second CSI according to the channel characteristics of each frequency band subset and the receiving algorithm of the UE itself;
  • CQI(a,b,c) indicates that the UE assumes that the rank of the channel is a
  • the function G( ) represents a function that synthesizes a precoding matrix by a two-stage PMI.
  • an apparatus for reporting CSI based on PUSCH is also provided in the embodiment of the present invention.
  • the principle of solving the problem is similar to the method for the UE to report CSI based on the PUSCH, so the implementation of the device can refer to the method. Implementation, repetition will not be repeated.
  • a device for reporting CSI based on a PUSCH includes a first communication unit 10, a processing unit 11, and a second processing unit 12, where
  • the first communication unit 10 is configured to receive the CSI report mode configuration signaling sent by the network side, where the CSI report mode configuration signaling carries at least the specified report mode identifier;
  • the processing unit 11 is configured to set a first CSI for the full bandwidth of the system according to the reporting type corresponding to the reporting mode identifier received by the first communication unit 10, and divide the full bandwidth of the system into at least two frequency band subsets, and identify according to the reporting mode.
  • Corresponding reporting type constructs a second CSI for a specified subset of frequency bands in the divided frequency band subset;
  • the second communication unit 12 is configured to send the first CSI and the second CSI to the network side when receiving the reporting indication signaling sent by the network side.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention is applicable to one or more computer usable storage media (including but not limited to disk storage, including computer usable program code,
  • 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.
  • three new reporting modes are added to the PUSCH to support the two-level feedback mode for the dual codebook.
  • the original reporting information is redefined as short-term/frequency selective CSI.
  • the reporting information for long-term/wideband CSI is added, and the newly added long-term/wideband CSI information can be combined with the original short-term/frequency-selective CSI information. It is reflected in the calculation of CQI, that is, the calculation of CQI needs to consider PMI-1 and PMI-2), so that the UE can comprehensively consider long-term/wideband CSI and short-term/frequency selective CSI when reporting CSI, thereby implementing PUSCH-based.
  • the two-stage feedback method for dual codebooks includes long-term/wideband PMI-1 and corresponding CQI, and short-term/frequency selectivity due to reported long-term/wideband CSI and short-term/frequency-selective CSI.
  • the corresponding CQI of the PMI-2T facilitates SU/MU-MIMO operation and corresponding adaptive modulation and coding processing.

Abstract

一种基于PUSCH上报CSI的方法及装置，用于基于双码本实现CSI的准确上报。该方法为：接收网络侧发送的CSI上报模式配置信令，所述CSI上报模式配置信令中至少携带指定的上报模式标识；根据所述上报模式标识对应的上报类型组建针对系统全带宽的第一CSI；将系统全带宽划分为至少两个频带子集，并根据所述上报模式标识对应的上报类型组建针对指定频带子集的第二CSI；接收到网络侧发送的上报指示信令时，将所述第一CSI和第二CSI发往网络侧。这样，UE在上报CSI时，可以综合考虑长期/宽带CSI与短期/频率选择性CSI，进而实现了基于PUSCH双码本的两级反馈机制。

Description

一种基于 PUSCH上报 CSI的方法及装置 本申请要求在 2010年 5月 7日提交中国专利局、 申请号为 201010172043.X、 发明名称为"一种基于 PUSCH上报 CSI的方法及装置"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
本发明涉及通信领域， 特别涉及一种基于 PUSCH上报 CSI的方法及装置。 背景技术
在点对点通信系统中， 若基站侧能够获得信道状态信息 （Channel State Information, CSI ), 就能够对发送的下行信号的调制方式、 编码速率与信号功率 的空间分布特性进行优化， 令发送的下行信号与信道传播特性相匹配， 从而实 现增强信号接收可靠性、 降低对接收算法复杂度要求的效果， 特别是在多用户 应用场景下， 基站侧可以根据其获得的 CSI进行调度判决， 从而实现系统频谱 效率的改善以及避免小区之间的干扰。
目前，长期演进（ Long-Term Evolution, LTE )Rel-8/9中规定，演进基站（ eNB ) 可以利用信道互易性或用户设备（UE ) 的反馈获得下行信道的 CSI, 其中， 物 理下行共享信道（ Physical Downlink Shared Channel, PDSCH ) 的几种主要传输 模式都釆用了基于码本的隐式 CSI反馈方法。 上述协议中， 规定在传输模式 4、 5、 6, 以及传输模式 8的预编码矩阵指示 （Precodeing Matrix Indicator, PMI ) 上报模式中， UE基于公共参考符号（Cell-specific Reference Signal, CRS )测量 下行信道， 并根据其自身的接收处理算法向 eNB上报下行链路所能支持的用于 表征数据流数量的秩指示（RI )、 以及 PMI, 同时， 还需要上报每个码字的信道 质量信息 （CQI ); 其中， CQI的计算过程中 UE需假设 eNB使用了本地推荐的 RI/PML
在 LTE Rel-8/9中，规定高层可以配置 UE釆用上行控制信道 ( Physical Uplink Control Channel , PUCCH ) 进行 CSI 的周期性上报和 /或釆用上行共享信道 ( Physical Uplink Shared Channel, PUSCH )进行 CSI非周期上报。 参阅表 1所 示， 针对 PUSCH而言， 存在 5种 PUSCH上报模式（也称为 PUSCH reporting mode ), UE使用的 PUSCH reporting mode由网络侧高层信令进行半静态配置。 每一种 PUSCH reporting mode对应于一种或多种 PUSCH上报类型（即 CQI/PMI feedback type ), UE根据网络侧指定的 PUSCH reporting mode所对应的 PUSCH 上报类型组建相应的 CSI, 所谓 CSI, 可以是 RI、 PMI和 CQI中的一种或任意 组合。
Figure imgf000004_0001
表 1
然而， 现有的 LTE Rel-8/9中釆用的 PUSCH上报机制是针对单码本结构进 行设计的， 侧重于单用户应用场景， 而在 Rel-10 (针对 LTE-A制定） 中将针对 PUSCH上报机制做出进一步的优化， 以更好地支持多用户场景目。 目前， 已经 确定在 Rel-10中釆用基于双码本的 PUSCH上报机制， 在这种机制下， CSI被区 分为较为稳定的长期 /宽带 CSI 以及具有较高时间 /频率选择性的短期 /频率选择 性 CSI, UE可以按照不同的反馈周期在 PUSCH上釆用两个码本分别对上述两 种 CSI进行量化。
然而， 现有的基于单码本的 CSI上报机制， 不区分长期 /宽带 CSI和短期 / 频率选择性 CSI, 所以不适合于 Rel-10规定的基于双码本的 PUSCH上报机制， 因此， 需要提供一种新的 PUSCH上报机制， 以实现长期 /宽带 CSI和短期 /频率 选择性的 CSI的准确上报。 发明内容
本发明实施例提供一种基于 PUSCH上报 CSI的方法及装置，用以基于双码 本实现 CSI的准确上 ·¾。
本发明实施例提供的具体技术方案如下：
一种基于上行共享信道上报信道状态信息的方法， 包括：
接收网络侧发送的 CSI上报模式配置信令， 所述 CSI上报模式配置信令中 至少携带指定的上 ^艮模式标识；
根据所述上报模式标识对应的上报类型组建针对系统全带宽的第一 CSI; 将系统全带宽划分为至少两个频带子集， 并根据所述上报模式标识对应的 上报类型组建针对指定频带子集的第二 CSI;
接收到网络侧发送的上报指示信令时， 将所述第一 CSI和第二 CSI发往网 络侧。
一种基于上行共享信道上报信道状态信息的装置， 包括：
第一通信单元， 接收网络侧发送的 CSI上报模式配置信令， 所述 CSI上报 模式配置信令中至少携带指定的上报模式标识；
处理单元， 用于根据所述上报模式标识对应的上报类型组建针对系统全带 宽的第一 CSI, 以及将系统全带宽划分为至少两个频带子集， 并根据所述上 4艮模 式标识对应的上报类型组建针对指定频带子集的第二 CSI；
第二通信单元， 用于接收到网络侧发送的上报指示信令时，将所述第一 CSI 和第二 CSI发往网络侧。
本发明实施例在 PUSCH中增加三种新的上报模式用于支持针对双码本的 两级反馈方式， 在新的上报模式下， 原有的上报信息被重新定义为短期 /频率选 择性 CSI, 在此基础上， 又增加了表征长期 /宽带 CSI的上报信息， 并且新增加 的长期 /宽带 CSI的上 ^艮信息可以与原有的短期 /频率选择性 CSI的上 ^艮信息相组 合， 从而令 UE在上报 CSI时， 可以综合考虑长期 /宽带 CSI与短期 /频率选择性 CSI, 进而实现了基于 PUSCH的针对双码本的两级反馈机制， 同时， 由于上报 的长期 /宽带 CSI与短期 /频率选择性 CSI中包括了长期 /宽带下的 PMI-1和相应 的 CQI, 以及短期 /频率选择性下的 PMI-2相应的 CQI,便于进行 SU/MU-MIMO (单用户 MIMO与多用户 MIMO切换）操作以及相应的自适应调制编码（ AMC ) 处理。
附图说明
图 1为本发明实施例中 UE基于 PUSCH上报 CSI的方法流程图；
图 2为本发明实施例中 UE功能结构示意图。
具体实施方式
参照 Rel 10的相关规定， 为了基于双码本实现 CSI的准确上报， 本发明实 施例中，提出了一种基于 PUSCH的 CSI的上报机制， 适用于釆用两级码本的预 编码过程。 在该机制下， UE可通过 PUSCH向网络侧 （如， eNB )上报长期 /宽 带 CSI (包括 PMI和 /或相应的 CQI信息 ) , 以及通过 PUSCH向网络侧上 4艮指定 频带子集的短期 /频率选择性 CSI (包括 PMI和 /或相应的 CQI信息）。
下面结合附图对本发明优选的实施方式进行详细说明。
参阅图 1所示， 本发明实施例中， UE基于 PUSCH上报 CSI的详细流程如 下：
步骤 100: 接收网络侧发送的信道状态信息 CSI上报模式配置信令， 其中 CSI上报模式配置信令中至少携带指定的上报模式标识（即需要釆用的上报模式 对应的上报模式标识）。
步骤 110: 根据上报模式标识对应的上报类型组建针对系统全带宽的第一 CSI, 以及将系统全带宽划分为至少两个频带子集， 并根据上报模式标识对应的 上报类型组建针对划分后的频带子集中指定频带子集的第二 CSI。
较佳的， 第一 CSI和第二 CSI分别包括秩指示 RI、 预编码矩阵指示 PMI和 信道质量信息 CQI中的一种或任意组合。
基于上述原理，由于现有的 PUSCH上报模式均无法支持针对双码本的两级 反馈方式， 因此本发明实施例中， 提出了在现有 PUSCH上报模式的基础上引入 一种或多种新的上报模式。 高层可以配置 Rel-8/9 UE使用原有的 model-2、 2-0、 2-2、 3-0、 3-1 , 而 Rel-10 UE则被配置为使用新的上报模式。在新的上报模式中， 需要包含反映长期 /宽带 CSI 的上报信息与反映短期 /频率选择性 CSI的上报信 息。参阅表 2所示，给出了三种新的 PUSCH reporting mode,分别记为 model-3、 2-3与 3-3。 为了支持针对双码本的两级反馈方式， 需要引入 3种新的上报模式 中的至少一种。
Figure imgf000007_0001
表 2
基于上述上报机制，参阅表 2所示，指定的上报模式标识可以指定 model-3、 2-3与 3-3中的任意一种。
本实施例中， 所谓的指定频带子集， 可以是划分出的全部频带子集， 也可 以是部分频带子集， 例如， 设定 M个频带子集。 实施中， 可以按照预先设定的 顺序指定频带子集；还可以在 UE上报时通过信令指示频带子集的编号指定频带 子集。 而每个频带子集包含若干物理资源块（PRB )、 若干子带 （sub-band )和 /或若干带宽部分（ bandwidth part )。
步骤 120: 接收到网络侧发送的上报指示信令时， 将第一 CSI和第二 CSI 发往网络侧。 较佳地， 将第一 CSI和第二 CSI同时发送给网络侧。
基于上述实施例， 在执行步骤 110时， 可以釆用三种新的 PUSCH reporting mode中的任意一种， 下面分别作出详细介绍：
1 )在 PUSCH reporting mode 1-3下：
UE根据系统全带宽的信道特性以及其自身的接收算法， 获得针对系统全带 宽的 PMI-1 , 作为第一 CSI; 例如， 假设一级码本的结构为 W-l= 1 其中
Figure imgf000008_0001
为 4 x 1向量， 表示下行信号的到达方向， UE可以选择具有最强信号功率 的到达方向所对应的 ^， 其中， W-1在一级码本中对应的标号即为 PMI-1。 以下 实施例中类似操作均基于相同原理， 不再赘述。
UE根据每一个频带子集的信道特性以及 UE自身的接收算法， 获得针对各 频带子集的 PMI-2 (每个频带子集的 PMI-2可以有一个或多个 ), 作为第二 CSI; 例如， UE可以根据下行信道矩阵与 W-1合成的等效信道 H X W-1 , 从二级码本 中选择 W-2使发送信号经过合成信道 H x W-1 X W-2以及 UE的接收处理之后能 够得到最好的信号质量， 其中， W-2在一级码本中对应的标号即为 PMI-2。 以下 实施例中类似操作均基于相同原理， 不再赘述。
UE根据下行信道特性及上报的 PMI-1与 PMI-2 , 获得针对系统全带宽上各 码字的第一 CQI, 作为第一 CSI; 第一 CQI = CQI ( RI, PMI-1, PMI-2 ) ,其中， UE需要将各频带子集对应的 PMI-2分别与 PMI-1组合成预编码矩阵来计算第一 CQI。 以下公式中均釆用同样方式解释相应参量的含义， 不再赘述。
上述 PMI-1、 PMI-2与第一 CQI的计算均假设下行信道 rank=RI。
2 )在 PUSCH reporting mode2-3下：
UE根据系统全带宽的信道特性以及其自身的接收算法， 获得针对系统全带 宽的 PMI-1 , 作为第一 CSI;
UE选择 M个频带子集， 并根据这 M个频带子集上的信道特性及其自身的 接收算法， 获得针对上述 M个频带子集的 PMI-2 ( M个频带子集中每个频带子 集的 PMI-2可以有一个或多个）， 作为第二 CSI;
UE根据下行信道特性及上报的 PMI-1 , 获得针对系统全带宽上各码字的第 — CQI, 作为第一 CSI, 其中， 第一 CQI=CQI(RIx, PMI-1 , PMI-2x)。 RIx表示 某个小于等于 RT ( RT表示一个 rank的门限）的数， 可以是固定的或按照某种规 律选择的， 而 PMI-2X表示 RTxRIx维预编码矩阵， 可以是从码本中按照某种规 律选择的， 也可以是固定的。
UE根据下行信道特性及上 ^艮的 PMI-1与 PMI-2, 获得针对 M个频率子集 上各码字的第二 CQI, 作为第二 CSI, 其中， 第二 CQI=CQI(RI,PMI-l,PMI-2), 进一步地， 为了节省反馈开销， 较佳的， 在上报第一 CQI和第二 CQI时， 除第一个码字的 CQI之外，其他各码字的 CQI可以只上报相较于第一个码字 CQI 的差值。
上述 PMI-1、 PMI-2与 CQI的计算均假设下行信道 rank=RI。
3 )在 PUSCH reporting mode3-3下：
UE根据系统全带宽的信道特性以及其自身的接收算法， 获得针对系统全带 宽的 PMI-1 , 作为第一 CSI;
UE根据每个频带子集的信道特性以及 UE自身的接收算法， 获得针对各频 带子集的 PMI-2, 作为第二 CSI;
UE根据下行信道特性及上报的 PMI-1与 PMI-2 , 获得针对系统全带宽上各 码字的第一 CQI, 作为第一 CSI, 其中， 第一 CQI=CQI(RI,PMI-l,PMI-2)。
UE根据下行信道特性及上报的 PMI-1与 PMI-2 , 获得针对各个频带子集上 各码字的第二 CQI, 作为第二 CSI, 其中， 第二 CQI=CQI(RI,PMI-l,PMI-2), 进一步地， 为了节省反馈开销， 较佳的， 在上报第一 CQI和第二 CQI时， 除第一个码字的 CQI之外，其他各码字的 CQI可以只上报相较于第一个码字 CQI 的差值。
在上述三种上报模式下， CQI(a,b,c)表示 UE假设信道的 rank为 a, 而 eNB 使用了与 PMI-l=b且 PMI-2=c所对应的合成预编码矩阵 PM=G(PMI-l,PMI-2)。 函数 G( )表示由两级 PMI合成预编码矩阵的函数。
基于同一发明构思， 本发明实施例中还提供了一种用于基于 PUSCH 上报 CSI的装置， 由于该装置解决问题的原理与 UE基于 PUSCH上报 CSI的方法相 似， 因此该装置的实施可以参见方法的实施， 重复之处不再赘述。
参阅图 2所示， 本发明实施例中， 用于基于 PUSCH上报 CSI的装置 （如， UE ) 包括第一通信单元 10, 处理单元 11和第二处理单元 12, 其中，
第一通信单元 10,用于接收网络侧发送的 CSI上报模式配置信令，其中 CSI 上报模式配置信令中至少携带指定的上报模式标识；
处理单元 11 ,用于根据第一通信单元 10接收的上报模式标识对应的上报类 型组建针对系统全带宽的第一 CSI, 以及将系统全带宽划分为至少两个频带子 集， 并根据上报模式标识对应的上报类型组建针对划分后的频带子集中指定频 带子集的第二 CSI;
第二通信单元 12, 用于接收到网络侧发送的上报指示信令时， 将第一 CSI 和第二 CSI发往网络侧。
本领域内的技术人员应明白， 本发明的实施例可提供为方法、 系统、 或计 算机程序产品。 因此， 本发明可釆用完全硬件实施例、 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， 本发明可釆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。
本发明实施例在 PUSCH 中增加三种新的上报模式用于支持针对双码本的 两级反馈方式， 在新的上报模式下， 原有的上报信息被重新定义为短期 /频率选 择性 CSI, 在此基础上， 又增加了表征长期 /宽带 CSI的上报信息， 并且新增加 的长期 /宽带 CSI的上 ^艮信息可以与原有的短期 /频率选择性 CSI的上 ^艮信息相组 合（组合体现在 CQI的计算方面， 即 CQI的计算需要考虑 PMI-1和 PMI-2 ) , 从而令 UE在上报 CSI时，可以综合考虑长期 /宽带 CSI与短期 /频率选择性 CSI, 进而实现了基于 PUSCH的针对双码本的两级反馈方式， 同时， 由于上报的长期 /宽带 CSI与短期 /频率选择性 CSI中包括了长期 /宽带下的 PMI-1和相应的 CQI, 以及短期 /频率选择性下的 PMI-2T相应的 CQI, 便于进行 SU/MU-MIMO操作 以及相应的自适应调制编码处理。 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、 一种基于上行共享信道上报信道状态信息的方法， 其特征在于， 包括： 接收网络侧发送的信道状态信息 CSI上报模式配置信令， 其中所述 CSI上 报模式配置信令中至少携带指定的上报模式标识；
根据所述上报模式标识对应的上报类型组建针对系统全带宽的第一 CSI,以 及将系统全带宽划分为至少两个频带子集， 并根据所述上报模式标识对应的上 报类型组建针对划分的频带子集中指定频带子集的第二 CSI;
接收到网络侧发送的上报指示信令时， 将所述第一 CSI和所述第二 CSI发 往网络侧。
2、 如权利要求 1所述的方法， 其特征在于， 所述频带子集包含至少两个物 理资源块 PRB、 至少两个子带 sub-band或者至少两个带宽部分 bandwidth part。
3、 如权利要求 1或 2所述的方法， 其特征在于， 所述第一 CSI和所述第二 CSI分别包括秩指示 RI、预编码矩阵指示 PMI和信道质量信息 CQI中的一种或 任意组合。
4、 如权利要求 3 所述的方法， 其特征在于， 组建第一 CSI 以及组建第二 CSI时， 包括：
根据系统全带宽的信道特性， 获得针对系统全带宽的第一 PMI;
根据每一个频带子集的信道特征， 获得针对各频带子集的第二 PMI;
根据下行信道特性及所述第一 PMI和所述第二 PMI, 获得针对系统全带宽 上各码字的第一 CQI。
5、 如权利要求 3 所述的方法， 其特征在于， 组建第一 CSI 以及组建第二 CSI时， 包括：
根据系统全带宽的信道特性及本地的接收算法， 获得针对系统全带宽的第 — PMI;
根据部分频带子集的信道特征及本地的接收算法， 获得针对部分频带子集 的第二 PMI;
根据下行信道特性及所述第一 PMI, 计算获得针对系统全带宽上各码字的 第一 CQI;
根据下行信道特性及所述第一 PMI和所述第二 PMI, 获得针对所述部分频 带子集上各码字的第二 CQI。
6、 如权利要求 3 所述的方法， 其特征在于， 组建第一 CSI 以及组建第二 CSI时， 包括：
根据系统全带宽的信道特性及本地的接收算法， 获得针对系统全带宽的第 — PMI;
根据每一个频带子集的信道特征及本地的接收算法， 获得针对各频带子集 的第二 PMI;
根据下行信道特性及所述第一 PMI和所述第二 PMI, 获得针对系统全带宽 上各码字的第一 CQI;
根据下行信道特性及所述第一 PMI和所述第二 PMI, 获得针对所述各频带 子集上各码字的第二 CQI。
7、 一种基于上行共享信道上报信道状态信息的装置， 其特征在于， 包括： 第一通信单元， 接收网络侧发送的信道状态信息 CSI上报模式配置信令， 其中所述 CSI上报模式配置信令中至少携带指定的上报模式标识；
处理单元， 用于根据所述上报模式标识对应的上报类型组建针对系统全带 宽的第一 CSI, 以及将系统全带宽划分为至少两个频带子集， 并根据所述上 ^艮模 式标识对应的上报类型组建针对划分的频带子集中指定频带子集的第二 CSI; 第二通信单元， 用于接收到网络侧发送的上报指示信令时，将所述第一 CSI 和所述第二 CSI发往网络侧。
8、 如权利要求 7所述的装置， 其特征在于， 所述处理单元具体用于： 根据所述上报模式标识对应的上报类型组建针对系统全带宽的第一 CSI,以 及根据所述上报模式标识对应的上报类型组建针对指定频带子集的第二 CSI时， 根据系统全带宽的信道特性， 获得针对系统全带宽的第一预编码矩阵指示 PMI, 根据每一个频带子集的信道特征及本地的接收算法， 获得针对各频带子集的第 二 PMI, 以及根据下行信道特性及所述第一 PMI和第二 PMI, 获得针对系统全 带宽上各码字的第一信道质量信息 CQI。
9、 如权利要求 7所述的装置， 其特征在于， 所述处理单元具体用于： 根据所述上报模式标识对应的上报类型组建针对系统全带宽的第一 CSI,以 及根据所述上报模式标识对应的上报类型组建针对指定频带子集的第二 CSI时， 根据系统全带宽的信道特性及本地的接收算法， 获得针对系统全带宽的第一预 编码矩阵指示 PMI, 根据部分频带子集的信道特征， 获得针对所述部分频带子 集的第二 PMI, 以及根据下行信道特性及所述第一 PMI, 计算获得针对系统全 带宽上各码字的第一信道质量信息 CQI, 并根据下行信道特性及所述第一 PMI 和第二 PMI, 获得针对所述部分频带子集上各码字的第二 CQI。
10、 如权利要求 7所述的装置， 其特征在于， 所述处理单元具体用于： 根据所述上报模式标识对应的上报类型组建针对系统全带宽的第一 CSI,以 及根据所述上报模式标识对应的上报类型组建针对指定频带子集的第二 CSI时， 根据系统全带宽的信道特性， 获得针对系统全带宽的第一预编码矩阵指示 PMI, 根据每一个频带子集的信道特征， 获得针对各频带子集的第二 PMI, 以及根据 下行信道特性及所述第一 PMI和第二 PMI, 获得针对系统全带宽上各码字的第 一信道质量信息 CQI, 并根据下行信道特性及所述第一 PMI和第二 PMI, 获得 针对所述各频带子集上各码字的第二 CQI。
11、 一种用户设备， 其特征在于， 该用户设备包括权利要求 7 ~ 10中任一所 述的基于上行共享信道上报信道状态信息的装置。
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