WO2012072028A1 - 一种上报信道状态的方法及装置 - Google Patents

一种上报信道状态的方法及装置 Download PDF

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Publication number
WO2012072028A1
WO2012072028A1 PCT/CN2011/083218 CN2011083218W WO2012072028A1 WO 2012072028 A1 WO2012072028 A1 WO 2012072028A1 CN 2011083218 W CN2011083218 W CN 2011083218W WO 2012072028 A1 WO2012072028 A1 WO 2012072028A1
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Prior art keywords
csi
ports
pmi
transmission scheme
data
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PCT/CN2011/083218
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English (en)
French (fr)
Inventor
苏昕
高秋彬
拉盖施
沈祖康
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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Application filed by Datang Mobile Communications Equipment Co Ltd filed Critical Datang Mobile Communications Equipment Co Ltd
Priority to KR1020137016846A priority Critical patent/KR101523687B1/ko
Priority to US13/991,152 priority patent/US9363700B2/en
Priority to EP11844919.8A priority patent/EP2648445B1/en
Priority to JP2013541196A priority patent/JP5711384B2/ja
Publication of WO2012072028A1 publication Critical patent/WO2012072028A1/zh
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/10Scheduling measurement reports ; Arrangements for measurement reports
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0417Feedback systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/063Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621Feedback content
    • H04B7/0632Channel quality parameters, e.g. channel quality indicator [CQI]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636Feedback format
    • H04B7/0639Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection

Definitions

  • the present invention relates to the field of communications, and more particularly to a method and apparatus for uplink state.
  • BACKGROUND OF THE INVENTION Channel shield information is an important basis for various adaptive adjustments and scheduling on the network side.
  • LTE Long Term Evolution
  • the UE needs to make a hypothesis on the transmission scheme of the PDSCH (Physical Downlink Shared Channel) according to the transmission mode in which the UE is located. For example, in the CQI calculation defined in LTE Rel-9 (Release 9), the hypothetical way of the PDSCH transmission scheme is shown in Figure 1.
  • PDSCH Physical Downlink Shared Channel
  • TM Transmission Mode
  • the UE (User Experience) needs to calculate and report the recommended PMI (Precoding Matrix Indicator) based on the detection of CRS (Cell-specific reference signals).
  • the precoding matrix indicates, and when the UE reports the CQI, it assumes that the eNB (evolved Node B) uses the PMI it reports.
  • TM7 non-codebook precoding is used.
  • the UE only needs to report CQI to e B, and e B calculates precoding or shaping vector.
  • the PMI and the non-PMI (non-PMI) feedback mode can be supported.
  • the UE can generate the report quantity (PMI/RI ( Rank Indication) according to the detection of the CRS according to the feedback mode of the high-level configuration and the specific reporting mode. CQI or CQI).
  • LTE-A LTE-Advanced, Extended Long Term Evolution
  • MIMO Multi-Input Multiple-Out-put
  • TM9 CSI reference signals
  • the demodulation method based on DMRS (De Modulation Reference Signal) is used in TM9.
  • the role of CSI-RS is only for detection and not demodulation. Similar to the TM8, the eNB can configure the reporting mode of the UE into a PMI or a non-PMI format through high layer signaling.
  • Embodiments of the present invention provide a method and apparatus for reporting a channel state, which are used to implement a CSI-RS based channel state.
  • a method for uplink state of a channel includes the following steps:
  • the user equipment UE detects the configuration information of the sounding reference signal CSI-RS;
  • the UE determines, according to the detection result, the number of ports required for reporting the channel state based on the CSI-RS;
  • the UE determines, according to the determined number of ports, the corresponding number of ports, and the transmission scheme, that the base station uses the CSI-RS based precoding matrix to indicate the PMI transmission scheme, and determines that the base station will perform the physical according to the codebook based precoding method.
  • the downlink shared channel PDSCH data is mapped to and transmitted on P CSI-RS ports, where the codebook is based on
  • the rank indicates the PDSCH data formed by the RI data layers, and represents the data formed by the P CSI-RS ports.
  • the UE calculates and reports channel state information according to the determined result.
  • a user equipment including:
  • a detecting module configured to detect configuration information of the sounding reference signal CSI-RS
  • a port number module configured to determine, according to the detection result, a number of ports required for reporting a channel state based on a CSI-RS; and a transmission mode module, configured to confirm the base station according to the determined number of ports, a preset number of ports, and a corresponding relationship between the transmission schemes
  • the CSI-RS-based precoding matrix is used to indicate the PMI transmission scheme, it is determined that the base station will map the data of the physical downlink shared channel PDSCH to the P CSI-RS ports according to the codebook-based precoding manner, and transmit the data.
  • S is PDSCH data consisting of RI data layers indicated by rank, indicating P CSI-RS ports
  • y a vector formed by the data; a reporting module, configured to calculate and report channel state information according to the determined result.
  • the UE determines the corresponding transmission mode according to the number of ports required for reporting the channel state based on the CSI-RS, and performs channel state information reporting by using the determined transmission scheme, which solves the problem that the CSI-RS cannot be used in the prior art.
  • the problem that the base station will use the transmission scheme and thus the channel state information cannot be reported.
  • FIG. 1 is a diagram showing a relationship between a transmission scheme and a transmission number in the prior art
  • FIG. 2 is a flowchart of a main method for reporting a channel state according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a method for transmitting channel state information on a non-PMI transmission scheme according to an embodiment of the present invention
  • FIG. 4 is a flowchart of reporting channel state information by using a CSI-RS based PMI transmission scheme according to an embodiment of the present invention
  • Method flow chart
  • FIG. 5 is a structural diagram of a UE according to an embodiment of the present invention.
  • the UE determines the corresponding transmission scheme according to the number of ports required for reporting the channel state based on the CSI-RS, and performs channel state information reporting by using the determined transmission scheme, which solves the CSI based on the prior art.
  • -RS cannot determine the transmission scheme that the base station will use and thus cannot report channel status information.
  • the main method for reporting channel state information in this embodiment is as follows:
  • Step 201 The UE detects configuration information of the CSI-RS.
  • Step 202 The UE determines, according to the detection result, the number of ports required for reporting the channel state based on the CSI-RS.
  • the configuration information of the CSI-RS includes the number of ports, and the UE can obtain the number of ports by detecting the configuration information.
  • Step 203 The UE determines a transmission scheme to be used by the base station according to the determined number of ports, the preset number of ports, and the corresponding relationship between the transmission schemes.
  • Step 204 The UE calculates and uplinks channel state information according to the determined transmission scheme.
  • the UE when the number of ports required for channel state reporting based on CSI-RS is 1, the UE assumes that the eNB transmits on the PDSCH through a single port (such as portO (port 0)), which is not required at this time.
  • the codebook is used, so the UE uses a non-PMI transmission scheme.
  • the UE assumes that the eNB maps the PDSCH data to the P CSI-RS ports according to the codebook-based precoding manner and transmits the data.
  • the codebook is used, so the UE uses a CSI-RS based PMI transmission scheme.
  • (0) CSI-RS based PMI transmission scheme
  • the codebook-based precoding method is represented by the formula y, where W is a P x RI dimensional matrix, and represents a codebook composed of a precoding matrix, in particular, a code composed of a precoding matrix defined by Rel-10. this.
  • S is the RI
  • the PDSCH data consisting of data layers
  • RI is the rank indication reported by the UE
  • y is the vector formed by the data on the P CSI-RS ports.
  • the CSI-RS port transmits, and at the same time, confirms that the base station maps the DMRS to the above P CSI-RS ends in the same manner.
  • Represents S , a k,l ( p ⁇ S, 14 + ⁇ ) Representing a symbol transmitted on the kth subcarrier, the first OFDM symbol, and the first CSI-RS port;
  • Step 301 After the UE accesses the network, the configuration information of the CSI-RS is obtained through system broadcast. Frequency position, period, and number of ports.
  • Step 302 The UE detects configuration information of the CSI-RS, and obtains a channel transmission matrix.
  • Step 303 The UE determines, according to the detection result of step 301, the number of ports required for reporting the channel state based on the CSI-RS, and finds that the number of ports is 1.
  • Step 304 The UE determines, according to the number of ports, that the eNB will transmit on the PDSCH through a single port.
  • Step 305 The UE determines a non-PMI transmission scheme according to an action of the eNB transmitting on the PDSCH through a single port.
  • Step 306 The UE calculates and reports the CQI according to the non-PMI transmission scheme.
  • a CQI is calculated and reported for each frequency domain reporting unit (such as a wideband or subband). Since the codebook is not needed at this time, only the CQI can be reported.
  • the method for reporting channel state information by using a CSI-RS based PMI transmission scheme in this embodiment is as follows:
  • Step 401 After the UE accesses the network, the configuration information of the CSI-RS is obtained through system broadcast.
  • Step 402 The UE detects the configuration information of the CSI-RS, and obtains a channel transmission matrix.
  • Step 403 The UE determines, according to the detection result of step 401, the number of ports required for reporting the channel state based on the CSI-RS, and finds that the number of ports is greater than 1.
  • Step 405 The UE determines a CSI-RS based PMI transmission scheme according to the determined action of the eNB.
  • Step 406 The UE calculates and reports the reporting unit in each frequency domain according to the CSI-RS-based PMI transmission scheme.
  • PMI denotes the label corresponding to W in the codebook.
  • Step 407 The UE calculates and reports the RI for the full bandwidth according to the CSI-RS based PMI transmission scheme.
  • Step 408 The UE calculates and reports the CQI according to the CSI-RS-based PMI transmission scheme and the calculated RI.
  • a CQI is calculated and reported for each frequency domain reporting unit (such as a wideband or subband).
  • the UE calculates and counts 4 CQIs on 4 units per frequency domain.
  • the UE calculates and reports the CQI for the two codewords in units of 4 units in each frequency domain.
  • the internal structure and functions of the UE are introduced.
  • the UE in this embodiment includes: a detection module 501, a port number module 502, a transmission mode module 503, and a reporting module 504.
  • the detecting module 501 is configured to detect the sounding reference signal CSI-RS.
  • the detection module 501 is also used to obtain the channel h, ⁇ ⁇ ⁇ ⁇ h
  • the transmission matrix simultaneous detection module 501 can detect the received interference and noise.
  • the port number module 502 is configured to determine, according to the detection result, the number of ports required for channel state reporting based on CSI-RS.
  • the transmission mode module 503 is configured to determine, according to the determined number of ports, the corresponding number of ports, and the transmission scheme, the transmission scheme to be used by the base station.
  • the correspondence between the preset number of ports and the transmission scheme includes: the number of ports is 1, corresponding to the non-PMI transmission scheme; the number of ports is greater than 1, corresponding to the PSI transmission scheme based on CSI-RS.
  • the transmission mode module 503 determines that the eNB will transmit on the PDSCH through a single port, and then determines a non-PMI transmission scheme according to the number of ports. Alternatively, the transmission mode module 503 determines that the eNB will follow the codebook based preamble according to the number of ports greater than 1.
  • the coding mode maps the PDSCH data to the P CSI-RS ports and transmits them, thereby determining the CSI-RS based
  • the reported channel state information includes The channel shield indicates CQI, that is, the reporting module 504 calculates and reports the CQI.
  • the reported channel state information includes CQI, PMI, and RI, that is, the reporting module 504 calculates. And report CQI, PMI and RI.
  • the reporting module 504 calculates and uplinks 4 PMIs for each unit in the frequency domain according to the CSI-RS-based PMI transmission scheme, and according to the CSI-based The PMI transmission scheme of the RS calculates and reports the RI for the full bandwidth, and calculates the RI according to the CSI-RS based PMI transmission scheme and the calculated RI.
  • the upper 4 ⁇ CQL RI is equal to 1, the upper 4 ⁇ module 504 is at each frequency.
  • the upper block 504 includes a computing unit and an interface unit.
  • the calculation unit is used to calculate channel state information.
  • the interface unit is used to send channel status information.
  • the interface unit is further configured to acquire configuration information of the CSI-RS by using a system broadcast.
  • the UE determines the corresponding transmission mode according to the number of ports required for reporting the channel state based on the CSI-RS, and performs channel state information reporting by using the determined transmission scheme, which solves the problem that the CSI-RS cannot be used in the prior art.
  • the embodiment of the present invention provides a corresponding transmission mode for different number of ports, and specifically provides channel state information that needs to be calculated and reported.
  • 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 in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) in which computer usable program code is embodied.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • Radio Transmission System (AREA)

Description

一种上报信道状态的方法及装置
本申请要求在 2010年 12月 2日提交中国专利局、 申请号为 201010569722.0、 发明名称为
"一种上报信道状态的方法及装置 "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, 特别是涉及上 4艮信道状态的方法及装置。 背景技术 信道盾量信息是网络侧进行各种自适应调整与调度的重要基础。 LTE ( Long Term
Evolution, 长期演进)中将信道盾量量化为 4bit (比特)的 CQI ( Channel Quality Indicator, 信道盾量指示), 每个 CQI的标号都对应一种调制方式与编码速率的组合。 UE在计算 CQI 时, 需要根据其所处的传输模式对 PDSCH ( Physical Downlink Shared Channel, 物理下行 链路共享信道)的传输方案进行假设。 例如 LTE Rel-9 (版本 9 )中定义的 CQI计算时, 对 PDSCH传输方案的假设方式如图 1所示。
TM ( Transmission Mode, 传输模式) 4-6中 UE ( User Experience, 用户设备)都需要 根据对 CRS ( Cell-specific reference signals, 小区公共参考信号)的检测计算并上报其推荐 的 PMI( Precoding Matrix Indicator,预编码矩阵指示),而 UE上报 CQI时则假设 eNB( evolved Node B, 演进基站)使用了其上报的 PMI。 TM7中釆用了非码本的预编码方式, UE只需 要向 e B上报 CQI, 而由 e B对预编码或赋形矢量进行计算。 TM8中可以支持 PMI与 non-PMI (非 PMI )两种反馈方式, UE可以按照高层配置的反馈方式与具体上报模式根据 对 CRS的检测生成上报量( PMI/RI ( Rank Indication, 秩指示) /CQI或者 CQI )。
LTE-A ( LTE- Advanced , 升级的长期演进) 系统中为了支持更高阶的 MIMO ( Multiple-Input Multiple-Out-put, 多输入多输出)传输(最多支持 8个数据层) 以及后续 版本中的多小区联合处理功能, 引入了新定义的 CSI-RS ( CSI reference signals, 探测参考 信号)。 TM9中釆用了基于 DMRS ( De Modulation Reference Signal, 解调参考信号) 的解 调方式, CSI-RS的作用只是用于检测而非解调。 与 TM8类似, eNB可以通过高层信令将 UE 的上报模式配置为 PMI或 non-PMI形式。 工作于 TM9的 non-PMI上报模式时, UE的 CQI上报 基于 CRS进行; 工作于 TM9且被配置为 PMI上报的 UE则需要根据对 CSI-RS的检测才能生成 CQI/PMI/RI等上报信息。 在这种情况下, 由于不存在基于 CSI-RS的传输方案, UE在 CQI 计算时无法假设 PDSCH釆用了哪种基于 CSI-RS的传输方案,也就无法基于 CSI-RS进行信道 状态上报。 发明内容 本发明实施例提供一种上报信道状态的方法及装置, 用于实现基于 CSI-RS 的信道状 态上 4艮。
一种上 4艮信道状态的方法, 包括以下步骤:
用户设备 UE对探测参考信号 CSI-RS的配置信息进行检测;
UE根据检测结果确定基于 CSI-RS的信道状态上报所需的端口数量;
UE根据确定的端口数量、 预设的端口数量与传输方案的对应关系, 确认基站釆用基 于 CSI-RS的预编码矩阵指示 PMI传输方案时, 确定基站将按照基于码本的预编码方式将 物理下行共享信道 PDSCH的数据映射到 P个 CSI-RS端口上并进行传输,其中,基于码本
(0)
y
的预编码方式为公式 = f 所表示的方式, W表示预编码矩阵构成的码本, S为由
(P-i)
y
(0)
y
秩指示 RI个数据层构成的 PDSCH数据, 表示 P个 CSI-RS端口上的数据所构成的
CP— l)
y
向量;
UE根据确定结果计算并上报信道状态信息。
一种用户设备, 包括:
检测模块, 用于对探测参考信号 CSI-RS的配置信息进行检测;
端口数量模块, 用于根据检测结果确定基于 CSI-RS的信道状态上报所需的端口数量; 传输模式模块, 用于根据确定的端口数量、 预设的端口数量与传输方案的对应关系, 确认基站釆用基于 CSI-RS的预编码矩阵指示 PMI传输方案时, 确定基站将按照基于码本 的预编码方式将物理下行共享信道 PDSCH的数据映射到 P个 CSI-RS端口上并进行传输,
(0)
y
其中,基于码本的预编码方式为公式 = · 所表示的方式, W表示预编码矩阵构成
(P-i)
y
(0)
y
的码本, S为由秩指示 RI个数据层构成的 PDSCH数据, 表示 P个 CSI-RS端口上
CP— l)
y 的数据所构成的向量; 上报模块, 用于根据确定结果计算并上报信道状态信息。
本发明实施例中 UE根据基于 CSI-RS的信道状态上报所需的端口数量,确定对应的传 输模式, 并利用确定的传输方案进行信道状态信息上报, 解决了现有技术中基于 CSI-RS 无法确定基站将釆用的传输方案进而无法上报信道状态信息的问题。 附图说明 图 1为现有技术中传输方案与传输编号的关系图;
图 2为本发明实施例中上报信道状态的主要方法流程图;
图 3为本发明实施例中釆用 non-PMI传输方案上 ·ί艮信道状态信息的方法流程图; 图 4为本发明实施例中釆用基于 CSI-RS的 PMI传输方案上报信道状态信息的方法流 程图;
图 5为本发明实施例中 UE的结构图。 具体实施方式 本发明实施例中 UE根据基于 CSI-RS的信道状态上报所需的端口数量,确定对应的传 输方案, 并利用确定的传输方案进行信道状态信息上报, 解决了现有技术中基于 CSI-RS 无法确定基站将釆用的传输方案进而无法上报信道状态信息的问题。
参见图 2, 本实施例中上报信道状态信息的主要方法流程如下:
步骤 201 : UE对 CSI-RS的配置信息进行检测。
步骤 202: UE根据检测结果确定基于 CSI-RS的信道状态上报所需的端口数量。其中, CSI-RS的配置信息包含有端口数量, UE可通过对配置信息的检测来获得端口数量。
步骤 203: UE根据确定的端口数量、 预设的端口数量与传输方案的对应关系, 确定基 站将釆用的传输方案。
步骤 204: UE根据确定的传输方案计算并上 4艮信道状态信息。
其中,当基于 CSI-RS的信道状态上报所需的端口数量为 1时, UE假设 eNB在 PDSCH 上进行传输时, 是通过单端口 (如 portO (端口 0 ) )进行传输的, 此时不需要用到码本, 因此 UE釆用 non-PMI传输方案。当基于 CSI-RS的信道状态上报所需的端口数量 P大于 1 时, UE假设 eNB按照基于码本的预编码方式将 PDSCH的数据映射到 P个 CSI-RS端口上 并进行传输, 此时需要用到码本, 因此 UE釆用基于 CSI-RS的 PMI传输方案。 较佳的, (0)
y
= W - s
(P-i)
基于码本的预编码方式如公式 y 所表示的方式, 其中, W为 P x RI维矩阵, 表 示预编码矩阵构成的码本, 尤其是选取自 Rel-10定义的预编码矩阵构成的码本。 S为由 RI
(0)
y
CP— l)
个数据层构成的 PDSCH数据, RI为 UE上报的 rank (秩)指示, y 表示 P个 CSI-RS 端口上的数据所构成的向量。 uk,l uk,l
具体为: UE 确认基站釆用 = w 的方式将 PDSCH数据映射到 P
uk,l uk,l
CSI-RS端口进行传输, 同时,确认基站釆用相同方式将 DMRS映射到上述 P个 CSI-RS端
~{p)
表示 S , ak,l ( p = \ S, 14 + ϋ )
Figure imgf000006_0002
表示第 k个子载波、 第 I个 OFDM符号、 第 个 CSI-RS 端口上传输的符号;
{ Ρ = Ί, 6 + )表示第 k个子载波、 第 1个 OFDM符号、 第 p个端口上的 PDSCH 数据或 DMRS符号, "表示 PDSCH的层数, 其中, UE确认基站在上述映射过程中使用了 UE推荐的 PMI/RI, 该 PMI/RI对应于码本中的预编码矩阵 W。 由于有多种传输方案, 下面通过两个实施例来针对每种传输模式详细介绍上 4艮过程。 参见图 3 , 本实施例中釆用 non-PMI传输方案上 4艮信道状态信息的方法流程如下: 步骤 301 : UE接入网络之后, 通过系统广播获取 CSI-RS的配置信息。 配置信息包括: 时频位置、 周期以及端口数等。
步骤 302: UE对 CSI-RS的配置信息进行检测, 获得信道传输矩阵
Figure imgf000006_0001
其中 /^表示由第 j个发射天线到第 i个接收天线之间的信道传输系数, R和 T分别为接收 和发送天线的数目。 同时 UE可以对接收到的千扰与噪声进行检测。 步骤 303 : UE根据步骤 301检测结果确定基于 CSI-RS的信道状态上报所需的端口数 量, 并发现端口数量为 1。
步骤 304: UE根据端口数量为 1 , 确定 eNB将通过单端口在 PDSCH上进行传输。 步骤 305 : UE根据 eNB通过单端口在 PDSCH上进行传输的动作, 确定 non-PMI传 输方案。
步骤 306: UE根据 non-PMI传输方案, 计算并上报 CQI。 尤其是为每个频域上报单位 (如宽带或子带)计算并上报一个 CQI。 由于此时不需要码本, 所以只上报 CQI即可。
参见图 4 , 本实施例中釆用基于 CSI-RS的 PMI传输方案上报信道状态信息的方法流 程如下:
步骤 401: UE接入网络之后, 通过系统广播获取 CSI-RS的配置信息。
■■■ K
H =
、 ■■■ h。 步骤 402: UE对 CSI-RS的配置信息进行检测, 获得信道传输矩阵
同时, UE可以对接收到的千扰与噪声进行检测。 步骤 403 : UE根据步骤 401检测结果确定基于 CSI-RS的信道状态上报所需的端口数 量, 并发现端口数量大于 1。
(0)
y
= W - s
(P-i)
步骤 于 y
404: UE根据端口数量大 1 , 确定 eNB将按照 方式将 PDSCH的 数据映射到 P个 CSI-RS端口上并进行传输。 步骤 405: UE根据已确定的 eNB的动作, 确定基于 CSI-RS的 PMI传输方案。
步骤 406: UE根据基于 CSI-RS的 PMI传输方案, 为每个频域上报单位计算并上报
PMI。 PMI表示 W在码本中所对应的标号。
步骤 407: UE根据基于 CSI-RS的 PMI传输方案, 为全带宽计算并上报 RI。
步骤 408: UE根据基于 CSI-RS的 PMI传输方案及计算得到的 RI, 计算并上报 CQI。 尤其是为每个频域上报单位(如宽带或子带)计算并上报一个 CQI。 RI等于 1时, UE在 每个频域上 4艮单位上计算并上 4艮 1个 CQI。 RI大于 1时, UE在每个频域上 4艮单位上对两 个码字分别计算并上报 CQI。
通过以上描述了解了上报信道状态信息的实现过程, 该过程主要由 UE实现, 下面对
UE的内部结构和功能进行介绍。
参见图 5 ,本实施例中 UE包括:检测模块 501、端口数量模块 502、传输模式模块 503 和上报模块 504。
检测模块 501用于对探测参考信号 CSI-RS进行检测。 检测模块 501还用于获得信道 h、、 ■■■ h
H =
传输矩阵 同时检测模块 501可以对接收到的千扰与噪声进行检测 端口数量模块 502用于根据检测结果确定基于 CSI-RS的信道状态上报所需的端口数 量。
传输模式模块 503用于根据确定的端口数量、预设的端口数量与传输方案的对应关系, 确定基站将釆用的传输方案。 预设的端口数量与传输方案的对应关系包括: 端口数量为 1 , 对应非 PMI传输方案; 端口数量大于 1 , 对应基于 CSI-RS的 PMI传输方案。 传输模式模 块 503根据端口数量为 1 ,确定 eNB将通过单端口在 PDSCH上进行传输,进而确定非 PMI 传输方案; 或者, 传输模式模块 503根据端口数量大于 1 , 确定 eNB将按照基于码本的预 编码方式将 PDSCH的数据映射到 P个 CSI-RS端口上并进行传输, 进而确定基于 CSI-RS
(0)
y
的 PMI传输方案。 基于码本的预编码方式包括公式 = f 所表示的方式, 其中 W
(P-i)
y
(0)
y
表示预编码矩阵构成的码本, S为由 RI个数据层构成的 PDSCH数据, 表示 P个
CP— l)
y
CSI-RS端口上的数据所构成的向量。 的方式将 PDSCH数据映
Figure imgf000008_0001
射到 P个 CSI-RS端口进行传输, 同时, 确认基站釆用相同方式将 DMRS映射到上述 P个 表 S , ¾/
Figure imgf000008_0002
( ^ = 15, 14 + υ )表示第 k个子载波、 第 /个 OFDM符号、 第 p个 CSI-RS端口上传输 的符号; ( p = 7, 6 + W )表示第 k个子载波、 第 1个 OFDM符号、 第 p个端口 上的 PDSCH数据或 DMRS符号, "表示 PDSCH的层数, 其中, 传输模式模块 503确认 基站在上述映射过程中使用了 UE推荐的 PMI/RI, 该 PMI/RI对应于码本中的预编码矩阵 W。 上 ·ίΜ莫块 504用于根据确定的传输方案计算并上 4艮信道状态信息。 当确定的传输方案 为非 ΡΜΙ传输方案时, 上报的信道状态信息包括信道盾量指示 CQI, 也就是上报模块 504 计算并上报 CQI。 当确定的传输方案为基于 CSI-RS的 PMI传输方案时, 上报的信道状态 信息包括 CQI、 PMI和 RI, 也就是上报模块 504计算并上报 CQI、 PMI和 RI。 具体的, 当确定的传输方案为基于 CSI-RS的 PMI传输方案时, 上报模块 504根据基于 CSI-RS的 PMI传输方案, 为每个频域上 4艮单位计算并上 4艮 PMI, 并根据基于 CSI-RS的 PMI传输方 案, 为全带宽计算并上报 RI, 以及根据基于 CSI-RS的 PMI传输方案及计算得到的 RI, 计 算并上 4艮 CQL RI等于 1时, 上 4艮模块 504在每个频域上 ·ί艮单位上计算并上 ·ί艮 1个 CQI; RI大于 1时, 上 4艮模块 504在每个频域上 4艮单位上对两个码字分别计算并上 4艮 CQI。
上 莫块 504包括计算单元和接口单元。 计算单元用于计算信道状态信息。 接口单元 用于发送信道状态信息。 接口单元还用于通过系统广播获取 CSI-RS的配置信息。
本发明实施例中 UE根据基于 CSI-RS的信道状态上报所需的端口数量,确定对应的传 输模式, 并利用确定的传输方案进行信道状态信息上报, 解决了现有技术中基于 CSI-RS 无法确定基站将釆用的传输方案进而无法上报信道状态信息的问题。 本发明实施例针对不 同的端口数量给出相应的传输模式, 并具体提供了需要计算和上报的信道状态信息。
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 可用存储介盾 (包括但不限于磁盘存储器和光学存储器等)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。
显然, 本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和 范围。这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内, 则本发明也意图包含这些改动和变型在内。

Claims

权 利 要 求
1、 一种上 4艮信道状态的方法, 其特征在于, 包括以下步骤:
用户设备 UE对探测参考信号 CSI-RS的配置信息进行检测;
UE根据检测结果确定基于 CSI-RS的信道状态上报所需的端口数量;
UE根据确定的端口数量、 预设的端口数量与传输方案的对应关系, 确认基站釆用基 于 CSI-RS的预编码矩阵指示 PMI传输方案时, 确定基站将按照基于码本的预编码方式将 物理下行共享信道 PDSCH的数据映射到 P个 CSI-RS端口上并进行传输,其中,基于码本
(0)
y
的预编码方式为公式 : 所表示的方式, W表示预编码矩阵构成的码本, S为由
(P-i)
y
(0)
y
秩指示 RI个数据层构成的 PDSCH数据, 表示 P个 CSI-RS端口上的数据所构成的
CP— l)
y
向量;
UE根据确定结果计算并上报信道状态信息。
2、 如权利要求 1 所述的方法, 其特征在于, 预设的端口数量与传输方案的对应关系 包括:
端口数量为 1 , 对应非 PMI传输方案;
端口数量大于 1 , 对应基于 CSI-RS的 PMI传输方案。
3、 如权利要求 2所述的方法, 其特征在于, 当确定的传输方案为基于 CSI-RS的 PMI 传输方案时, 上报的信道状态信息包括 CQI、 PMI和 RI。
4、 如权利要求 3所述的方法, 其特征在于, 当确定的传输方案为基于 CSI-RS的 PMI 传输方案时, UE根据确定结果计算并上 4艮信道状态信息的步骤包括:
UE根据确定的映射方式, 为每个频域上 4艮单位计算并上 4艮 PMI;
UE根据确定的映射方式, 为全带宽计算并上报 RI;
UE根据确定的映射方式以及 PMI和 RI , 计算并上 4艮 CQI。
5、 如权利要求 4所述的方法, 其特征在于, UE根据基于 CSI-RS的 PMI传输方案及 计算得到的 RI, 计算并上 4艮 CQI的步骤包括:
RI等于 1时, UE在每个频域上 ·ί艮单位上计算并上 ·ί艮 1个 CQI;
RI大于 1时, UE在每个频域上 4艮单位上对两个码字分别计算并上 4艮 CQI。
6、 如权利要求 1 - 5 任一项所述的方法, 其特征在于, UE 确定基站釆用公式 (0)
y
: 所表示的方式式将 PDSCH的数据映射到 P个 CSI-RS端口上并进行传输, 时, 包括: 的方式将 PDSCH数据映射到 P个 CSI-RS端口
Figure imgf000012_0001
进行传输, 同时, 确认基站釆用相同方式将 DMRS映射到所述述 P个 CSI-RS端口上进行 表示 s, a i ( ^ = 15,…… 14 + υ )表示第 k
Figure imgf000012_0002
个子载波、第 /个 OFDM符号、第 个 CSI-RS端口上传输的符号; i P二,, 6 + V ) 表示第 k个子载波、 第 /个 OFDM符号、 第 p个端口上的 PDSCH数据或 DMRS符号, " 表示 PDSCH的层数, 其中, UE确认基站在上述映射过程中使用了 UE推荐的 PMI/RI, 该 PMI/RI对应于码本中的预编码矩阵 W。
7、 一种用户设备, 其特征在于, 包括: 检测模块, 用于对探测参考信号 CSI-RS的配置信息进行检测;
端口数量模块, 用于根据检测结果确定基于 CSI-RS的信道状态上报所需的端口数量; 传输模式模块, 用于根据确定的端口数量、 预设的端口数量与传输方案的对应关系, 确认基站釆用基于 CSI-RS的预编码矩阵指示 PMI传输方案时, 确定基站将按照基于码本 的预编码方式将物理下行共享信道 PDSCH的数据映射到 P个 CSI-RS端口上并进行传输,
(0)
y
其中,基于码本的预编码方式为公式 : 所表示的方式, W表示预编码矩阵构成
(P-i)
y
(0)
y
的码本, S为由秩指示 RI个数据层构成的 PDSCH数据, 表示 P个 CSI-RS端口上
CP— l)
y
的数据所构成的向量; 上报模块, 用于根据确定结果计算并上报信道状态信息。
8、 如权利要求 7 所述的用户设备, 其特征在于, 预设的端口数量与传输方案的对应 关系包括: 端口数量为 1 , 对应非示 PMI传输方案;
端口数量大于 1 , 对应基于 CSI-RS的 PMI传输方案。
9、 如权利要求 8所述的用户设备, 其特征在于, 当确定的传输方案为基于 CSI - RS 的 PMI传输方案时, 上报的信道状态信息包括 CQI、 PMI和 RI。
10、 如权利要求 9所述的用户设备, 其特征在于, 当确定的传输方案为基于 CSI-RS 的 PMI传输方案时, 上报模块根据确定的映射方式为每个频域上报单位计算并上报 PMI, 并根据确定的映射方式为全带宽计算并上 4艮 RI, 以及根据确定的映射方式、 PMI和 RI, 计算并上报 CQI。
11、 如权利要求 10所述的用户设备, 其特征在于, RI等于 1时, 上报模块在每个频 域上 4艮单位上计算并上 4艮 1个 CQI; RI大于 1时, 上 4艮模块在每个频域上 4艮单位上对两个 码字分别计算并上报 CQI。
12、 如权利要求 11任一项所述的用户设备, 其特征在于, 传输模式模块确定基站
,(o)
y
釆用公式 所表示的方式式将 PDSCH的数据映射到 P个 CSI-RS端口上并进
(P-i)
y
行传输, 时, 包括: 的方式将 PDSCH数据映射到 P 水
Figure imgf000013_0001
CSI-RS端口进行传输, 同时,确认基站釆用相同方式将 DMRS映射到所述 P个 CSI-RS端
~(p) ~
表示 S, akJ ( ^ = 15,…… + υ )
Figure imgf000013_0002
表示第 k 个子载波、 第 I个 OFDM符号、 第 个 CSI-RS 端口上传输的符号; ,ι
( ρ = , 6 + t» )表示第 k个子载波、 第 1个 OFDM符号、 第 p个端口上的 PDSCH 数据或 DMRS符号, "表示 PDSCH的层数, 其中, 传输模式模块确认基站在上述映射过 程中使用了 UE推荐的 PMI/RI, 该 PMI/RI对应于码本中的预编码矩阵 W。
PCT/CN2011/083218 2010-12-02 2011-11-30 一种上报信道状态的方法及装置 Ceased WO2012072028A1 (zh)

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