WO2013023543A1 - 一种传输cqi的方法及装置 - Google Patents

一种传输cqi的方法及装置 Download PDF

Info

Publication number
WO2013023543A1
WO2013023543A1 PCT/CN2012/079847 CN2012079847W WO2013023543A1 WO 2013023543 A1 WO2013023543 A1 WO 2013023543A1 CN 2012079847 W CN2012079847 W CN 2012079847W WO 2013023543 A1 WO2013023543 A1 WO 2013023543A1
Authority
WO
WIPO (PCT)
Prior art keywords
cqi
transmission point
transmission
base station
channel matrix
Prior art date
Application number
PCT/CN2012/079847
Other languages
English (en)
French (fr)
Inventor
倪浩
高秋彬
彭莹
张然然
Original Assignee
电信科学技术研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 电信科学技术研究院 filed Critical 电信科学技术研究院
Publication of WO2013023543A1 publication Critical patent/WO2013023543A1/zh

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092Error control systems characterised by the topology of the transmission link

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and apparatus for transmitting CQI. Background technique
  • the terminal needs to report the channel quality indicator (CQI) of the base station to the terminal.
  • CQI channel quality indicator
  • Each CQI corresponds to a certain time and frequency resource.
  • the user equipment (UE) needs to be performed according to reference signals such as cell-specific reference signals (CRS) or channel-state information reference signals (CSI-RS) transmitted by the base station: 3 ⁇ 4 Volume, and calculate and feedback CQI.
  • Feedback includes periodic feedback and aperiodic feedback.
  • the periodic feedback consists of 4 feedback modes: 1-0, 2-0, 1-1, and 2-1. These feedback modes include 1, la, 2, 2a, 2b, 2c, 3, 4, 5, and 6 total 9 Medium escalation type.
  • the reporting information of the reporting types 1, la, 2, 2b, 2c, and 4 includes the channel shield indication information.
  • the aperiodic feedback includes five feedback modes: 1-2, 2-0, 2-2, 3-0, and 3-1. These feedback modes include channel shield indication information feedback.
  • TDD Time Division Duplex
  • the base station can measure uplink channel information of the UE to the base station according to a sounding reference symbol (SRS) transmitted by the UE, and then utilize channel reciprocity.
  • SRS sounding reference symbol
  • the downlink channel information of the base station to the UE is obtained.
  • CQI the measurement result of the SRS to perform scheduling operations on the UE.
  • a multipoint coordinated transmission technique is currently proposed, which is a collaboration between a plurality of transmission points separated geographically.
  • the plurality of transmission points include base stations of different cells and a plurality of RRHs (remote radio heads) controlled by the base station.
  • Multi-point coordinated transmission technology can be divided into downlink cooperative transmission and uplink joint reception.
  • the embodiments of the present invention provide a method and an apparatus for transmitting CQI, which are used to implement CQI transmission for multiple transmission points, so as to improve scheduling accuracy and reduce interference between adjacent areas.
  • a method for transmitting CQI, which is applied to the UE side includes the following steps:
  • the calculated CQIs of the plurality of transmission points are transmitted to at least the primary transmission point.
  • a method for transmitting CQI, applied to the network side includes the following steps:
  • the primary transmission point receives the CQI sent by the user equipment UE, and the CQI is calculated according to the primary transmission point adhere and I n ,
  • I n is the sum of the interference and system noise power from the set of transmission points where the primary transmission point is located;
  • the base station corresponding to the primary transmission point performs modulation coding mode MCS selection according to the obtained CQI.
  • a user equipment UE including:
  • An interface module configured to receive a reference signal sent by multiple transmission points
  • a module configured, for each transmission point, constructing a channel matrix H ij n according to a reference signal sent by the transmission point; and a measuring module, configured to measure sum of interference and system noise power from the plurality of transmission points / admir; calculation module for ⁇ according to the main transmission point of multiple transmission points.
  • ⁇ ⁇ and ⁇ ⁇ calculate the channel shield indication CQI of the main transmission point, and for the other transmission points except the main transmission point
  • Each of the collaborative transmission points according to the ⁇ of the primary transmission point.
  • Calculating a coordinated transmission point ⁇ "and the amount of the coordinated transmission point shield channel indicator CQI, and instructs interface module calculates the transmission point of the plurality of CQI transmission at least to the main transmission point.
  • a base station comprising:
  • An interface module configured to receive a CQI sent by the user equipment UE, where the CQI is calculated according to the primary transmission point massage and I n , is a channel matrix constructed according to a reference signal sent by the primary transmission point, where I n is from the primary transmission point The sum of the interference and system noise power outside the set of transmission points;
  • a control module is configured to perform MCS selection according to the obtained CQI.
  • a transmission point device comprising:
  • a first interface module configured to receive a CQI sent by the user equipment UE, where the CQI is calculated according to the primary transmission point massage and I n , where is a channel matrix constructed according to a reference signal sent by the primary transmission point, where I n is from the primary The sum of the interference and system noise power outside the set of transmission points where the transmission point is located;
  • a second interface module configured to forward the received CQI to the corresponding base station, so that the base station performs the CQI according to the obtained
  • the CQI is calculated for a plurality of transmission points, especially considering the sum of the interference and the system noise power except for a plurality of transmission points, and the thus obtained CQI enables scheduling and link adaptation in the coordinated multi-point transmission. Adjustments and other operations are more accurate.
  • FIG. 1 is a flowchart of a method for a UE to transmit a CQI according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a main method for transmitting CQI on a network side according to an embodiment of the present invention
  • FIG. 3 is a flowchart of a detailed method for transmitting CQI on the network side according to an embodiment of the present invention
  • FIG. 4 is a structural diagram of a UE in an embodiment of the present invention.
  • FIG. 5 is a main structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 6 is a detailed structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 7 is a main structural diagram of a transmission point device according to an embodiment of the present invention.
  • FIG. 8 is a detailed structural diagram of a transmission point device according to an embodiment of the present invention. detailed description
  • the CQI is calculated for a plurality of transmission points, especially considering the sum of the interference and the system noise power except for a plurality of transmission points, and the thus obtained CQI enables scheduling and link adaptation in the coordinated multi-point transmission. Adjustments and other operations are more accurate.
  • a plurality of transmission points constitute a transmission point set, or a plurality of transmission points in this embodiment refers to a transmission point in the transmission point set.
  • one transmission point of the transmission point set ⁇ . is the primary transmission point, and the other transmission points are cooperative transmission points.
  • the primary transmission point refers to a transmission point that transmits a useful signal to the UE in cooperative scheduling/beamforming and dynamic transmission point selection, and a transmission point that the base station specifies or the UE selects to transmit a useful signal to the UE in the joint transmission. If there are multiple transmission points transmitting the useful signal, the primary transmission point is one of the plurality of transmission points transmitting the useful signal, designated by the base station or selected by the UE.
  • the transmission point can be a base station or a device such as an RRH.
  • Step 101 Receive a reference signal sent by multiple transmission points.
  • the reference signal includes a CRS or a CSI-RS or the like.
  • Step 102 Construct a channel matrix according to a reference signal sent by the transmission point for each transmission point
  • Step 103 Measure the sum of the interference and system noise powers from the plurality of transmission points.
  • Step 104 According to a channel matrix ⁇ of the primary transmission point in the plurality of transmission points. Lambda "and ⁇ ⁇ calculated transmission point of the main shield indicating the amount of the CQI channel, and a plurality of transmission points for each coordinated transmission point of the transmission point other than the master, 0. ⁇ The primary transmission point" and the coordinated transmission The channel shield quantity indicating the cooperative transmission point indicates the CQI.
  • Step 105 The CQI of the plurality of transmission points is calculated to be transmitted to at least the main transmission point. Specifically, the calculated CQI of each transmission point is separately sent to the corresponding transmission point, and the coordinated transmission point forwards the received CQI to the primary transmission point or the base station corresponding to the primary transmission point. Alternatively, the calculated CQIs of all transmission points are directly sent to the primary transmission point, and are transmitted by the primary transmission point to the corresponding base station.
  • the above process is implemented by the UE, and the calculated CQI is sent to at least the primary transmission point.
  • the UE receives the reference signal sent by each transmission point in the set of transmission points (for the set of transmission points of UE j).
  • the channel matrix is constructed by the received reference signal.
  • the dimension of the matrix is N R xN T i , where the number of receiving antennas of UE j is represented, and N T i represents the number of transmitting antennas of transmission point i.
  • EESM exposure effective SINR mapping
  • the channel matrix is obtained at the transmission point and it is difficult to schedule the scene to the same time.
  • the base station needs to obtain the CQI feedback of the coordinated transmission point, so that the accuracy of the scheduling can be effectively improved for the scenario. If the base station obtains a channel matrix from a plurality of transmission points and can schedule to the same time, or the base station obtains a channel matrix of a plurality of transmission points from the UE, CQI feedback of the cooperative transmission point may not be obtained.
  • the CQI increment is an increment of CQI when the CQI of the cooperative cell is not considered, and the CQI when the cooperative cell is disturbed. Considering the quantization range, transmitting CQI increments can improve the accuracy of CQI feedback.
  • the CQI formula used in conjunction with the CQI increment is preferably
  • Y 0j Q ⁇ g ⁇ Y 0 ' j n ⁇ )) . Since the present embodiment provides a CQI increment, it is necessary to improve the existing feedback mode and feedback type, or define a new feedback type.
  • the feedback mode and/or feedback type used to feed back the downlink channel information to the primary transmission point includes the CQI delta value.
  • the feedback mode and feedback type of periodic feedback support CQI incremental information feedback; the feedback mode of aperiodic feedback supports CQI incremental information feedback.
  • five feedback modes of a physical uplink shared channel (PUSCH) are extended, and feedback of the feedback mode 1-2 to the primary transmission point includes a broadband CQI increment value.
  • the feedback mode 3-0 and 3-1 feedback to the primary transmission point contains the CQI delta value for each subband in the subband set.
  • the feedback mode 2-0 and 2-2 feedback to the primary transmission point contains a CQI delta value on the subbands selected by the M UEs of size k, and M and k are preset parameters.
  • a new feedback type is added to the PUCCH periodic feedback, so that the feedback type of the periodic feedback supports the CQI incremental information feedback.
  • the feedback type of the periodic feedback supports the CQI incremental information feedback.
  • a new feedback type is defined.
  • the new feedback type supports wideband PMI, CQI, and CQI incremental information feedback based on the feedback type 2d; for example, defining a new feedback type, the new feedback type is Feedback types 4a, 4b support broadband CQI and CQI increments, or wideband CQI incremental information feedback, respectively.
  • the network side After receiving the CQI, the network side can perform scheduling and the like according to the CQI, and refer to the following embodiments.
  • the main method for transmitting CQI on the network side in this embodiment is as follows:
  • Step 201 The primary transmission point receives the CQI sent by the user equipment UE, and the CQI is calculated according to the primary transmission pointawning and I n , ′ is a channel matrix constructed according to the reference signal sent by the primary transmission point, and ⁇ is from the primary transmission. The sum of the interference and system noise power outside the set of transmission points.
  • Step 202 The base station corresponding to the primary transmission point performs MCS (Modulation and Coding Mode) selection according to the obtained CQI. If the primary transmission point is a base station, the CQI is directly obtained and MCS selection is performed. If the primary transmission point is not a base station, the received CQI is forwarded to the base station, and the base station performs MC S selection according to the obtained CQI. If the UE schedules the UE after obtaining the CQI, in order to improve the accuracy, the CQI needs to be calculated again, see the following embodiment.
  • MCS Modulation and Coding Mode
  • the detailed method for transmitting CQI on the network side in this embodiment is as follows:
  • Step 301 The base station obtains CQIs of multiple transmission points. For example, a base station obtains CQI from multiple transmission points. Alternatively, the base station obtains CQIs of a plurality of transmission points from the primary transmission point.
  • Step 302 The base station obtains a channel matrix I3 ⁇ 4 y of a plurality of transmission points. For example, the base station obtains a channel matrix y from a plurality of transmission points. Alternatively, the base station obtains a channel matrix y for a plurality of transmission points from the UE. Alternatively, the base station obtains a channel matrix I3 ⁇ 4 y for a plurality of transmission points from the primary transmission point. The base station can also adjust the H y corresponding to the same transmission point according to the received CQI to obtain the adjusted channel matrix whatsoever. Alternatively, the base station obtains a channel matrix from a plurality of transmission points, which is a channel matrix ⁇ obtained by each transmission point adjusting ⁇ corresponding to the same transmission point according to the received CQI.
  • Step 303 The base station calculates, according to the received CQI and the obtained channel matrix of the primary transmission point, the sum of the interference and the system noise power outside the set of transmission points where the autonomous transmission point is located. If the CQI increment is received, the base station according to the base station received
  • Step 304 The base station recalculates the CQI according to the obtained channel matrix of the multiple transmission points, and the precoding matrix. If the computational complexity allows, the base station may recalculate the CQI according to the obtained channel matrix, precoding matrix, linear detection matrix, and .
  • Step 305 The base station performs MCS selection according to the calculated CQI.
  • This embodiment is applicable to a base station for cooperative scheduling or joint transmission, and can also be used for single cell scheduling or transmission.
  • the accuracy of CQI can be significantly improved.
  • the base station obtains CQI information ⁇ ⁇ of a plurality of transmission points, and obtains a channel matrix y of a plurality of transmission points.
  • ses indicates the main transmission point
  • the channel matrix represents the adjusted channel matrix. This formula is also used if the channel matrix is adjusted by the transmission point. This adjustment is based on the transmit power of the UE to the base station (or transmission point), so the adjustment is not unique, for example, it can be adjusted with ⁇ ⁇ and the average on the set of subcarriers.
  • the base station can perform user scheduling by using the adjusted channel matrix, and calculate a precoding matrix of each transmission point.
  • the set of transmission points is Sj ., s . cc .
  • the set of final scheduled users in the set of transmission points Cj is set to be.
  • the precoding calculation of the base station obtains that the precoding matrix of the transmission point in the transmission point set sends a signal to the user j as W, mecanic, es, ⁇ , then the base station calculates the transmission point set outside the autonomous transmission point for the main transmission point. Disturbance and system
  • the formula for the sum of H, H, and noise power is: If the base station receives a CQI increment, the formula is i.
  • the base station maps the SINR on each subcarrier to one water
  • a single CQI value, ie the SINR is quantized, the formula is g I B ⁇ ).
  • B represents the set of subcarriers scheduled by the base station, and the corresponding frequency band may be a resource block, a subband or an entire
  • the base station can determine the modulation coding mode and the amount of transmission information used by the user for downlink transmission.
  • the implementation process of transmitting CQI is understood by the above description.
  • the process is mainly implemented by the UE, the transmission point and the base station.
  • the internal functions and results of the three devices are introduced below.
  • the UE in this embodiment includes: an interface module 401, a construction module 402, a measurement module 403, and a calculation module 404.
  • the interface module 401 is configured to receive reference signals transmitted by multiple transmission points.
  • the constructing module 402 is configured to construct a channel matrix H ij n according to a reference signal transmitted by the transmission point for each transmission point.
  • the measurement module 403 is configured to measure the sum of the interference and system noise powers from the plurality of transmission points.
  • the calculation module 404 is configured to determine the ⁇ of the primary transmission point among the plurality of transmission points. ⁇ "and ⁇ ⁇ calculated transmission point of the main shield indicating the amount of the CQI channel, and a plurality of transmission points for each coordinated transmission point other than the primary transmission point, according to the main transmission points H 0. "The amount of the shield and cooperating channel transmission point of the transmission point cooperating CQI indication, the interface module 401 and indicating the calculated transmission point of the plurality of CQI transmission at least to the main transmission point.
  • the calculation module 404 is also used to determine the ⁇ according to the primary transmission point. ⁇ "and the CQI is calculated ⁇ ⁇ incremental point of the main transmission, and the interface module indicating the calculated delta CQI sent to at least the main transmission point. Delta CQI is the CQI without regard to cooperative cell scrambling thousand cells relative to consider collaborating The increment of the CQI at the time of the interference.
  • the interface module 401 separately sends the calculated CQI of each transmission point to the corresponding transmission point, and the coordinated transmission point forwards the received CQI to the primary transmission point; or, it will calculate The CQI of all transmission points is sent directly to the primary transmission point.
  • the feedback mode and/or feedback type used to feed back the downlink channel information to the primary transmission point includes the CQI delta value.
  • the feedback mode and feedback type of periodic feedback support CQI incremental information feedback; the feedback mode of aperiodic feedback supports CQI incremental information feedback.
  • feedback mode 1-2 includes a wideband CQI delta value for feedback to the primary transmission point.
  • the feedback mode 3-0 and 3-1 feedback to the primary transmission point contains the CQI delta value for each subband in the subband set.
  • the feedback mode 2-0 and 2-2 feedback to the primary transmission point includes a CQI delta value on the subband selected by the UE of size k, and M and k are preset parameters.
  • the feedback type of periodic feedback supports CQI incremental information feedback.
  • the base station in this embodiment includes: an interface module 501 and a control module 502.
  • the base station in this embodiment includes the function as a primary transmission point.
  • the interface module 501 is configured to receive a CQI sent by the user equipment UE, where the CQI is according to a primary transmission point.
  • ⁇ "and ⁇ ⁇ calculated, ⁇ . ⁇ " is the channel matrix reference signal configuration of the main transmission point transmission, ⁇ ⁇ from one thousand interference and system noise power outside of the set of points where the transmission of the main transmission point and.
  • Control module 502 is operative to perform MCS selection based on the obtained CQI.
  • the base station further includes: a calculation module
  • the calculation module 503 is used to recalculate the CQI.
  • Control module 502 performs MCS selection based on the calculated CQI.
  • the interface module 501 is further configured to obtain a channel matrix I3 ⁇ 4 y of the plurality of transmission points.
  • the calculation module 503 calculates the transmission point set where the autonomous transmission point is located according to the received CQI and the obtained channel matrix of the primary transmission point among the plurality of transmission points. The sum of the interference and the system noise power outside n ; the channel matrix, the precoding matrix and the devisrecalculation CQI according to the obtained multiple transmission points.
  • the interface module 501 obtains the channel matrix I3 ⁇ 4 y from a plurality of transmission points. Alternatively, the channel matrix lange for a plurality of transmission points is obtained from the UE.
  • the calculation module 503 is further configured to adjust the I3 ⁇ 4 y corresponding to the same transmission point according to the received CQI to obtain the adjusted channel matrix, or the interface module 501 obtains the channel matrix from multiple transmission points, which are based on the transmission points. Receive The CQI to the I3 ⁇ 4 y corresponding to the same transmission point. The adjusted channel matrix whatsoever.
  • the calculation module 503 can calculate ⁇ ⁇ based on the received CQI and CQI increments and the obtained channel matrix.
  • the calculation module 503 can calculate the CQI according to the obtained channel matrix, precoding matrix, linear detection matrix, andbread.
  • the transmission point device in this embodiment includes: a first interface module 701 and a second interface module 702.
  • the transmission point device is not a base station, such as an RRH.
  • the first interface module 701 is configured to receive a CQI sent by the user equipment UE, where the CQI is according to a primary transmission point. ⁇ paragraph and
  • the second interface module 702 is configured to forward the received CQI to the corresponding base station, so that the base station performs MCS selection according to the obtained CQI.
  • the second interface module 702 is further configured to obtain a channel matrix y about a plurality of transmission points, and send the obtained channel matrix to the corresponding base station. Specifically, the second interface module obtains the channel matrix I3 ⁇ 4 from other transmission points and locally. y . ⁇ / RTI> Alternatively, the channel matrix I3 ⁇ 4 y for a plurality of transmission points is obtained from the UE through the first interface module.
  • the transmission point device further includes: an adjustment module 703, as shown in FIG.
  • the adjusting module 703 is configured to adjust the I3 ⁇ 4 y corresponding to the same transmission point according to the received CQI to obtain the adjusted channel matrix, or the second interface module 702 obtains the channel matrix from other transmission points, which are based on the transmission points.
  • the received CQI pair corresponds to the same transmission point H y .
  • the second interface module 702 obtains the channel matrix from other transmission points, which are based on the transmission points.
  • the received CQI pair corresponds to the same transmission point H y .
  • the CQI is calculated for a plurality of transmission points, especially considering the sum of the interference and the system noise power except for a plurality of transmission points, and the thus obtained CQI enables scheduling and link adaptation in the coordinated multi-point transmission. Adjustments and other operations are more accurate.
  • the embodiment of the invention also calculates the CQI by using the CQI increment, the adjusted channel matrix and the linear detection matrix, improves the accuracy and accuracy of the CQI from multiple angles, and improves the base station scheduling and link adaptation in the coordinated multi-point transmission. Adjust the accuracy of operations such as.
  • the embodiments of the present invention improve multiple implementation manners in multiple links, which can reduce base station load or reduce network transmission resources.
  • 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 present invention is directed to a flowchart of a method, apparatus (system), and computer program product according to an embodiment of the present invention. And / or block diagram to describe. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本发明公开了一种传输CQI的方法,用于实现针对多传输点的CQI的传输,以提高调度的准确度,减少邻区之间的干扰。所述方法包括:接收多个传输点发送的参考信号;针对每个传输点,根据该传输点发送的参考信号构造信道矩阵Hij,n;测量来自所述多个传输点之外的干扰和系统噪声功率之和In;根据多个传输点中主传输点的信道矩阵Η0j,n和In计算该主传输点的信道盾量指示CQI,以及针对多个传输点中除主传输点之外的每个协作传输点,根据主传输点的Η0j,n和该协作传输点的Hij,n计算该协作传输点的信道盾量指示CQI;将计算出所述多个传输点的CQI至少发送给主传输点。本发明还公开了用于实现所述方法的装置。

Description

一种传输 COI的方法及装置 本申请要求在 2011年 8月 16日提交中国专利局、 申请号为 201110234923.X、发明名称 为"一种传输 CQI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, 特别是涉及传输 CQI的方法及装置。 背景技术
为了协助基站进行用户调度和链路自适应, 长期演进(Long Term Evolution, LTE ) 系统中, 终端需要上报基站到该终端的信道盾量指示信息 ( Channel Quality Indicator, CQI )。 每个 CQI对应一定的时间和频率资源。 用户设备(User Equipment, UE )需要根 据基站发射的小区专用参考信号 ( cell-specific reference signals, CRS )或信道状态信息参 考信号 ( channel- state information reference signals, CSI-RS )等参考信号进行: ¾量, 并计算 和反馈 CQI。 反馈包括周期反馈和非周期反馈。 周期反馈包含 1-0、 2-0、 1-1和 2-1共 4种 反馈模式, 这些反馈模式共包含 1、 la、 2、 2a、 2b、 2c、 3、 4、 5和 6共 9中上报类型。 其中上报类型 1、 la、 2、 2b、 2c和 4的上报信息中包含了信道盾量指示信息。 非周期反馈 包含了 1-2、 2-0、 2-2、 3-0、 3-1共 5种反馈模式, 这些反馈模式中都包含信道盾量指示信 息反馈。
另一种方式是, 在时分双工 ( Time Division Duplex , TDD ) 系统中, 基站可以根 据 UE发射的探测参考信号( sounding reference symbol, SRS )测量 UE到基站的上行信道 信息, 然后利用信道互易性获得基站到 UE的下行信道信息。 或者同时参考 CQI和对 SRS 的测量结果对 UE进行调度等操作。
目前提出了多点协作传输技术, 该技术是地理位置上分离的多个传输点之间的协作。 多个传输点包括不同小区的基站和基站控制的多个 RRH (远程无线头)。 多点协作传输技 术可分为下行的协作传输和上行的联合接收。
然而, 现有测得的 CQI和对 SRS的测量, 均是针对单一传输点, 尚无针对多个传输 点的测量方案。 如果利用现有的 CQI和对 SRS的测量结果, 将影响调度和链路自适应调 整等操作的准确度。 发明内容 本发明实施例提供一种传输 CQI的方法及装置,用于实现针对多传输点的 CQI的传输, 以提高调度的准确度, 减少邻区之间的千扰。
一种传输 CQI的方法, 应用在 UE侧, 包括以下步骤:
接收多个传输点发送的参考信号;
针对每个传输点, 根据该传输点发送的参考信号构造信道矩阵 Hij n
测量来自所述多个传输点之外的千扰和系统噪声功率之和 /„;
根据多个传输点中主传输点的信道矩阵 Η。Λ„和 Ιη计算该主传输点的信道盾量指示
CQI, 以及针对多个传输点中除主传输点之外的每个协作传输点, 根据主传输点的 Η。Λ„和 该协作传输点的 计算该协作传输点的信道盾量指示 CQI;
将计算出的所述多个传输点的 CQI至少发送给主传输点。
一种传输 CQI的方法, 应用于网络侧, 包括以下步骤:
主传输点接收用户设备 UE发送的 CQI,该 CQI是根据主传输点 „和 In计算得到的,
„是根据主传输点发送的参考信号构造的信道矩阵, In是来自主传输点所在传输点集合 之外的千扰和系统噪声功率之和;
主传输点对应的基站根据获得的 CQI进行调制编码方式 MCS选择。
一种用户设备 UE, 包括:
接口模块, 用于接收多个传输点发送的参考信号;
构造模块, 用于针对每个传输点, 根据该传输点发送的参考信号构造信道矩阵 Hij n; 测量模块, 用于测量来自所述多个传输点之外的千扰和系统噪声功率之和 /„; 计算模块,用于根据多个传输点中主传输点的 Η。Λ„和 Ιη计算该主传输点的信道盾量指 示 CQI, 以及针对多个传输点中除主传输点之外的每个协作传输点, 根据主传输点的 Η。Λ„ 和该协作传输点的 计算该协作传输点的信道盾量指示 CQI, 并指示接口模块将计算出 所述多个传输点的 CQI至少发送给主传输点。
一种基站, 包括:
接口模块, 用于接收用户设备 UE发送的 CQI , 该 CQI是根据主传输点 „和 In计算 得到的, 是根据主传输点发送的参考信号构造的信道矩阵, In是来自主传输点所在传 输点集合之外的千扰和系统噪声功率之和;
控制模块, 用于根据获得的 CQI进行 MCS选择。 一种传输点设备, 包括:
第一接口模块, 用于接收用户设备 UE发送的 CQI , 该 CQI是根据主传输点 „和 In 计算得到的, „是根据主传输点发送的参考信号构造的信道矩阵, In是来自主传输点所 在传输点集合之外的千扰和系统噪声功率之和;
第二接口模块, 用于将收到的 CQI转发给对应的基站, 使基站根据获得的 CQI进行
MCS选择。
本发明实施例中针对多个传输点计算 CQI, 尤其是考虑到多个传输点之外的千扰和系 统噪声功率之和,这样得到的 CQI使得多点协作传输中的调度和链路自适应调整等操作更 准确。 附图说明
图 1为本发明实施例中 UE传输 CQI的方法流程图;
图 2为本发明实施例中网络侧传输 CQI的主要方法流程图;
图 3为本发明实施例中网络侧传输 CQI的详细方法流程图;
图 4为本发明实施例中 UE的结构图;
图 5为本发明实施例中基站的主要结构图;
图 6为本发明实施例中基站的详细结构图;
图 7为本发明实施例中传输点设备的主要结构图;
图 8为本发明实施例中传输点设备的详细结构图。 具体实施方式
本发明实施例中针对多个传输点计算 CQI, 尤其是考虑到多个传输点之外的千扰和系 统噪声功率之和,这样得到的 CQI使得多点协作传输中的调度和链路自适应调整等操作更 准确。
本实施例中多个传输点构成传输点集合 , 或者说本实施例中的多个传输点是指传输 点集合^.中的传输点。 相对某个 UE来说, 传输点集合^.的一个传输点为主传输点, 其它 传输点为协作传输点。 主传输点是指在协作调度 /波束赋形和动态传输点选择中向 UE发送 有用信号的传输点, 在联合传输中基站指定或 UE选择的一个向 UE发送有用信号的传输 点。 如果有多个发送有用信号的传输点, 则主传输点为该多个发送有用信号的传输点中的 一个, 由基站指定或 UE选择。 传输点可以基站或 RRH等设备。
参见图 1 , 本实施例中传输 CQI的方法流程如下: 步骤 101 : 接收多个传输点发送的参考信号。 参考信号包括 CRS或 CSI-RS等。
步骤 102: 针对每个传输点, 根据该传输点发送的参考信号构造信道矩阵
步骤 103 : 测量来自所述多个传输点之外的千扰和系统噪声功率之和 /„。
步骤 104: 根据多个传输点中主传输点的信道矩阵 Η。Λ„和 Ιη计算该主传输点的信道盾 量指示 CQI, 以及针对多个传输点中除主传输点之外的每个协作传输点, 根据主传输点的 Η0 .„和该协作传输点的 计算该协作传输点的信道盾量指示 CQI 步骤 105 : 将计算出所述多个传输点的 CQI至少发送给主传输点。 具体的, 将计算出 的每个传输点的 CQI分别发送给相应的传输点,以及协作传输点将收到的 CQI转发给主传 输点或主传输点对应的基站。或者,将计算出的所有传输点的 CQI都直接发送给主传输点, 由主传输点发送给相应的基站。
以上流程由 UE实现, 将计算出的 CQI至少发送给主传输点。
具体的, UE接收传输点集合 (针对 UE j的传输点集合) 中的各传输点发送的参考 信号。 通过收到的参考信号构造信道矩阵 该矩阵的维度为 NR xNT i , 其中 表示 UE j接收天线数, NT i表示传输点 i发射天线数。 以及测量来自所述多个传输点之外的千 扰和系统噪声功率之和 /„。 然后通过公式^. N}))计算主传输点的 CQI,
Figure imgf000006_0001
H
其中, 设主传输点的序号为 0 , ^表示主传输点的 CQI, y0j n = 11 ° , Η。Λ„表示主传 输点的信道矩阵。 表示 CQI映射函数,具体的可以是 EESM ( exponential effective SINR mapping, 指数有效信千噪比映射)映射函数, N表示子载波集合, 其对应的频段可以是一 个资源块、 一个子带或整个系统频段。 ρ(·)表示量化函数, I I表示矩阵取模, 获得的是信 号功率 。 计算除主传输点之外 的 某个协 传输点 的 CQI 的公式为
7i] (^ , ≠0)。 考虑到基站从多
Figure imgf000006_0002
个传输点处获得信道矩阵而很难调度到同一时刻的场景,基站需获得协作传输点的 CQI反 馈, 这样对于该场景可有效提高调度的准确度。 如果基站从多个传输点处获得信道矩阵并 且能够调度到同一时刻, 或者基站从 UE处获得多个传输点的信道矩阵, 则可以不获得协 作传输点的 CQI反馈。
UE 还可以针对主传输点进一步计算 CQI 增量 , 计算公式为 : A0J = Q(g({r0] rie « E N})) , 其中 γ η , /。„为用户测量或计算得
Figure imgf000007_0001
到集合 内除主传输点之外其它传输点的用户接收功率之和。 CQI增量为不考虑协作小区 千扰时的 CQI相对考虑协作小区千扰时的 CQI的增量。 考虑到量化范围, 传输 CQI增量 可提高 CQI反馈的精度。
若 UE 上报了 CQI增量, 则较佳的, 与 CQI 增量配合使用的 CQI 的计算公式为
Y0j = Q{g{{Y0'j n^})) 。 由于本实施例提供了 CQI增量, 因此需对现有的反馈模式和反馈类型进行改进, 或者 定义新的反馈类型。
向主传输点反馈下行信道信息所釆用的反馈模式和 /或反馈类型中包括 CQI增量值。 周期反馈的反馈模式和反馈类型支持 CQI增量信息反馈; 非周期反馈的反馈模式支持 CQI 增量信息反馈。具体的,例如对物理上行共享信道(physical uplink shared channel, PUSCH ) 的 5种反馈模式进行扩展, 反馈模式 1-2对主传输点的反馈中包含宽带 CQI增量值。 反馈 模式 3-0和 3-1对主传输点的反馈中包含子带集合中每个子带的 CQI增量值。反馈模式 2-0 和 2-2对主传输点的反馈中包含 M个大小为 k的 UE选择的子带上的一个 CQI增量值, M 和 k为预设参数。
或者, 在 PUCCH周期反馈中增加新的反馈类型, 使周期反馈的反馈类型支持 CQI增 量信息反馈。 例如, 定义新的反馈类型, 该新的反馈类型是在反馈类型 lb、 lc、 Id的基础 上分别支持子带 PMI、 CQI和 CQI增量, 或子带 CQI和 CQI增量, 或子带 CQI增量信息 反馈。又如,定义新的反馈类型,该新的反馈类型是在反馈类型 2d的基础上支持宽带 PMI、 CQI和 CQI增量信息反馈; 又如, 定义新的反馈类型, 该新的反馈类型是在反馈类型 4a、 4b的基础上分别支持宽带 CQI和 CQI增量, 或宽带 CQI增量信息反馈。
网络侧收到 CQI后可根据该 CQI进行调度等操作, 参见下面的实施例。
参见图 2, 本实施例中网络侧传输 CQI的主要方法流程如下:
步骤 201:主传输点接收用户设备 UE发送的 CQI,该 CQI是根据主传输点 „和 In计 算得到的, „是根据主传输点发送的参考信号构造的信道矩阵, /„是来自主传输点所在 传输点集合之外的千扰和系统噪声功率之和。
步骤 202: 主传输点对应的基站根据获得的 CQI进行 MCS (调制编码方式)选择。 如 果主传输点是基站, 则直接获得 CQI并进行 MCS选择。 如果主传输点不是基站, 则将收 到的 CQI转发给基站, 由基站根据获得的 CQI进行 MC S选择。 如果基站获得 CQI后对 UE进行了调度, 为了提高准确度, 需再次计算 CQI, 参见下 面的实施例。
参见图 3 , 本实施例中网络侧传输 CQI的详细方法流程如下:
步骤 301 : 基站获得多个传输点的 CQI。 例如, 基站从多个传输点处获得 CQI。 或者, 基站从主传输点处获得多个传输点的 CQI。
步骤 302: 基站获得多个传输点的信道矩阵 I¾y.„。 例如, 所述基站从多个传输点处获 得信道矩阵 y.„。 或者, 所述基站从 UE处获得关于多个传输点的信道矩阵 y.„。 或者, 所述基站从主传输点处获得关于多个传输点的信道矩阵 I¾y.„。 基站还可以根据收到的 CQI对对应同一传输点的 Hy.„进行调整, 获得调整后的信道矩 阵 „。 或者, 基站从多个传输点处获得信道矩阵, 是各传输点根据收到的 CQI对对应同 一传输点的 η进行调整后的信道矩阵 η
步骤 303: 基站根据收到的 CQI和获得的主传输点的信道矩阵计算出来自主传输点所 在传输点集合之外的千扰和系统噪声功率之和 „。 如果收到 CQI增量, 则基站根据收到的
CQI和 CQI增量以及获得的信道矩阵计算出 ϊη。 步骤 304: 基站根据获得的多个传输点的信道矩阵、 预编码矩阵和 „重新计算 CQI。 如果计算复杂度允许, 基站可以根据获得的信道矩阵、 预编码矩阵、 线性检测矩阵和 „重 新计算 CQI。
步骤 305: 基站根据计算出的 CQI进行 MCS选择。
本实施例适用于基站进行协同调度或联合传输, 也可以用于单小区调度或传输。 对于 单小区调度或传输可明显提高 CQI的精度。
下面对图 3所示的实施例进行详细说明。
基站获得多个传输点的 CQI信息 γϋ , 以及获得多个传输点的信道矩阵 y.„。基站对信 道矩阵 Ηιι η进行调整的公式为: „ = H, (i e c ,. , ≠ 0)。 ή。 ,„表示主传输点
Figure imgf000008_0001
的信道矩阵, 表示调整后的信道矩阵。 如果是由传输点对信道矩阵进行调整, 也釆用 该公式。 该调整依据的是 UE到基站(或传输点) 的发射功率, 因此调整方式不唯一, 例 如可以用 Ηο 和 在子载波集合 Ν上的平均进行调整。 基站可以利用调整之后的信 道矩阵进行用户调度, 并计算各传输点的预编码矩阵
然 假设在子载波 n 上对用户 j 进行了调度, 向用户 j 发送有用信号的传输点数量为
M, M≥ 1 , 传输点集合为 Sj., s . c c . , 设传输点集合 Cj内最终调度用户的集合为 。 基站 的预编码计算得到传输点集合 中的传输点 对用户 j 发送信号的预编码矩阵为 W,„, e s,。 则基计站针对主传输点计算出来自主传输点所在传输点集合之外的千扰和系统
H, H, 噪声功率之和 / 的公式为: , 如果基站收到 CQI增量,则公式为 i,
j ,.„表示计算出的 SINR。 如果运算复杂度允许, 虑
Figure imgf000009_0001
利用线性检测矩阵计算 SINR, 则公式为 并
基站将每个子载波上的 SINR映射到一水
D ∑ 单一的 CQI值, 即对 SINR进行量化, 公式为 =g I B})。 表示最终计算得到 公 的 CQI, B表示基站调度的子载波集合, 其对应的频带可以是一个资源块、 一个子带或整
_式 个系统频带。 基站根据重新计算的用户 CQI, 可以决定用户下行传输使用的调制编码方 o式 和传输信息量的大小。
通过以上描述了解了传输 CQI的实现过程, 该过程主要由 UE、 传输点和基站实现, 下面对这三个设备的内部功能和结果进行介绍。
参见图 4, 本实施例中 UE包括: 接口模块 401、 构造模块 402、 测量模块 403和计算 模块 404。
接口模块 401用于接收多个传输点发送的参考信号。
构造模块 402用于针对每个传输点,根据该传输点发送的参考信号构造信道矩阵 Hij n。 测量模块 403用于测量来自所述多个传输点之外的千扰和系统噪声功率之和 。 计算模块 404 用于根据多个传输点中主传输点的 Η。Λ„和 Ιη计算该主传输点的信道盾 量指示 CQI, 以及针对多个传输点中除主传输点之外的每个协作传输点, 根据主传输点的 H0 .„和该协作传输点的 该协作传输点的信道盾量指示 CQI, 并指示接口模块 401将计 算出所述多个传输点的 CQI至少发送给主传输点。
计算模块 404还用于根据主传输点的 Η。Λ„和 Ιη计算该主传输点的 CQI增量, 并指示 接口模块将计算出的 CQI增量至少发送给主传输点。 CQI增量为不考虑协作小区千扰时的 CQI相对考虑协作小区千扰时的 CQI的增量。接口模块 401将计算出的每个传输点的 CQI 分别发送给相应的传输点, 以及协作传输点将收到的 CQI转发给主传输点; 或者, 将计算 出的所有传输点的 CQI都直接发送给主传输点。
向主传输点反馈下行信道信息所釆用的反馈模式和 /或反馈类型中包括 CQI增量值。 周期反馈的反馈模式和反馈类型支持 CQI增量信息反馈; 非周期反馈的反馈模式支持 CQI 增量信息反馈。 例如, 反馈模式 1-2对主传输点的反馈中包含宽带 CQI增量值。 反馈模式 3-0和 3-1对主传输点的反馈中包含子带集合中每个子带的 CQI增量值。 反馈模式 2-0和 2-2对主传输点的反馈中包含 Μ个大小为 k的 UE选择的子带上的一个 CQI增量值, M和 k为预设参数。 周期反馈的反馈类型支持 CQI增量信息反馈。
参见图 5 , 本实施例中基站包括: 接口模块 501和控制模块 502。 本实施例中基站包 括作为主传输点的功能。
接口模块 501用于接收用户设备 UE发送的 CQI,该 CQI是根据主传输点 Η。Λ„和 Ιη计 算得到的, Η。Λ„是根据主传输点发送的参考信号构造的信道矩阵, Ιη是来自主传输点所在 传输点集合之外的千扰和系统噪声功率之和。
控制模块 502用于根据获得的 CQI进行 MCS选择。
当控制模块 502在收到 CQI后对所述 UE进行了调度时, 所述基站还包括: 计算模块
503 , 参见图 6所示。 计算模块 503用于重新计算 CQI。控制模块 502根据计算得到的 CQI 进行 MCS选择。
接口模块 501还用于获得多个传输点的信道矩阵 I¾y.„。 计算模块 503根据收到的 CQI 和获得的多个传输点中主传输点的信道矩阵计算出来自主传输点所在传输点集合之外的 千扰和系统噪声功率之和 n ; 根据获得的多个传输点的信道矩阵、 预编码矩阵和 „重新计 算 CQI。 其中, 接口模块 501从多个传输点处获得信道矩阵 I¾y.„; 或者, 从 UE处获得关 于多个传输点的信道矩阵 „。
计算模块 503还用于根据收到的 CQI对对应同一传输点的 I¾y.„进行调整, 获得调整后 的信道矩阵 或者, 接口模块 501从多个传输点处获得信道矩阵, 是各传输点根据收 到的 CQI对对应同一传输点的 I¾y.„进行调整后的信道矩阵 „。 计算模块 503可以才 居收到的 CQI和 CQI增量以及获得的信道矩阵计算出 ϊη 。 另夕卜, 计算模块 503可以根据获得的信道矩阵、 预编码矩阵、 线性检测矩阵和 „重新计算 CQI。
参见图 7, 本实施例中传输点设备包括: 第一接口模块 701和第二接口模块 702。 本 实施例中传输点设备不为基站, 如为 RRH等设备。
第一接口模块 701用于接收用户设备 UE发送的 CQI,该 CQI是根据主传输点 Η。Λ„和
Ιη计算得到的, Η。Λ„是根据主传输点发送的参考信号构造的信道矩阵, Ιη是来自主传输点 所在传输点集合之外的千扰和系统噪声功率之和。
第二接口模块 702用于将收到的 CQI转发给对应的基站,使基站根据获得的 CQI进行 MCS选择。
第二接口模块 702还用于获得关于多个传输点的信道矩阵 y.„ , 并将获得的信道矩阵 发送给对应的基站。 具体的, 第二接口模块从其它传输点和本地获得信道矩阵 I¾y.„; 或者, 通过第一接口模块从 UE处获得关于多个传输点的信道矩阵 I¾y.„。
所述传输点设备还包括: 调整模块 703 , 参见图 8所示。 调整模块 703用于根据收到 的 CQI对对应同一传输点的 I¾y.„进行调整, 获得调整后的信道矩阵 或者, 第二接口 模块 702从其它传输点处获得信道矩阵,是各传输点根据收到的 CQI对对应同一传输点的 Hy.„进行调整后的信道矩阵 ,n
本发明实施例中针对多个传输点计算 CQI, 尤其是考虑到多个传输点之外的千扰和系 统噪声功率之和,这样得到的 CQI使得多点协作传输中的调度和链路自适应调整等操作更 准确。 本发明实施例还通过 CQI增量、 调整后的信道矩阵及线性检测矩阵计算 CQI, 从多 个角度提高了 CQI的准确度和精度,进而提高了多点协作传输时基站调度和链路自适应调 整等操作的准确度。 并且, 本发明实施例在多个环节提高了多种实现方式, 可减少基站负 荷或减少网络传输资源。
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、 一种传输信道盾量指示信息 CQI的方法, 其特征在于, 包括以下步骤:
接收多个传输点发送的参考信号;
针对每个传输点, 根据该传输点发送的参考信号构造信道矩阵 Hij n
测量来自所述多个传输点之外的千扰和系统噪声功率之和 /„;
根据多个传输点中主传输点的信道矩阵 Η。Λ„和 Ιη计算该主传输点的信道盾量指示 CQI, 以及针对多个传输点中除主传输点之外的每个协作传输点, 根据主传输点的 Η。Λ„和 该协作传输点的 计算该协作传输点的信道盾量指示 CQI;
将计算出的所述多个传输点的 CQI至少发送给主传输点。
2、如权利要求 1所述的方法,其特征在于,还包括步骤:根据主传输点的 Η。Λ„和 /„计 算该主传输点的 CQI增量, 并将计算出的 CQI增量至少发送给主传输点。
3、 如权利要求 2所述的方法, 其特征在于, 所述 CQI增量为不考虑协作传输点千扰 时的 CQI相对考虑协作传输点千扰时的 CQI的增量。
4、 如权利要求 2 所述的方法, 其特征在于, 向主传输点反馈下行信道信息所釆用的 反馈模式和 /或反馈类型中包括 CQI增量值。
5、如权利要求 4所述的方法, 其特征在于, 周期反馈的反馈模式和反馈类型支持 CQI 增量信息反馈; 非周期反馈的反馈模式支持 CQI增量信息反馈。
6、如权利要求 2所述的方法,其特征在于,根据多个传输点中主传输点的 Η。Λ„和 Ιη计 算该主传输点的信道盾量指示 CQI的步骤包括:根据多个传输点中主传输点的 Η。Λ„、 /„和 所述多个传输点中协作传输点的用户接收功率之和,计算该主传输点的信道盾量指示 CQI。
7、 如权利要求 1所述的方法, 其特征在于, 将计算出所述多个传输点的 CQI至少发 送给主传输点的步骤包括:
将计算出的每个传输点的 CQI 分别发送给相应的传输点, 以及协作传输点将收到的 CQI转发给主传输点; 或者
将计算出的所有传输点的 CQI都直接发送给主传输点。
8、 一种传输 CQI的方法, 其特征在于, 包括以下步骤:
主传输点接收用户设备 UE发送的 CQI,该 CQI是根据主传输点 Η。Λ„和 Ιη计算得到的, Η0 .„是根据主传输点发送的参考信号构造的信道矩阵, Ιη是来自主传输点所在传输点集合 之外的千扰和系统噪声功率之和; 主传输点对应的基站根据获得的 CQI进行调制编码方式 MCS选择。
9、 如权利要求 8所述的方法, 其特征在于, 主传输点接收用户设备 UE发送的 CQI 后, 如果所述基站对所述 UE进行了调度, 则还包括步骤: 主传输点对应的基站重新计算 CQI;
主传输点对应的基站根据获得的 CQI进行 MCS选择的步骤包括: 主传输点对应的基 站根据计算得到的 CQI进行 MCS选择。
10、 如权利要求 9所述的方法, 其特征在于, 主传输点对应的基站重新计算 CQI的步 骤包括:
所述基站获得多个传输点的信道矩阵 y.„;
所述基站根据收到的 CQI和获得的主传输点的信道矩阵计算出来自主传输点所在传输 点集合之外的千扰和系统噪声功率之和 ϊη
所述基站根据获得的多个传输点的信道矩阵、 预编码矩阵和 „重新计算 CQI。
11、如权利要求 10所述的方法,其特征在于,所述基站获得多个传输点的信道矩阵 I¾y.„ 的步骤包括:
所述基站从多个传输点处获得信道矩阵 I¾y.„; 或者 所述基站从 UE处获得关于多个传输点的信道矩阵 I¾y.„。
12、如权利要求 11所述的方法, 其特征在于, 所述基站从多个传输点处获得信道矩阵 ή „后, 还包括步骤: 所述基站根据收到的 CQI对对应同一传输点的 I¾y.„进行调整, 获得 调整后的信道矩阵 n; 或者
所述基站从多个传输点处获得信道矩阵,是各传输点根据收到的 CQI对对应同一传输 点的 y.„进行调整后的信道矩阵 „。
13、 如权利要求 10所述的方法, 其特征在于, 所述基站根据收到的 CQI和获得的信 道矩阵计算出来自主传输点所在传输点集合之外的千扰和系统噪声功率之和 ^的步骤包 括: 所述基站根据收到的 CQI和 CQI增量以及获得的信道矩阵计算出 ϊη
14、 如权利要求 10 所述的方法, 其特征在于, 所述基站根据获得的信道矩阵、 预编 码矩阵和 ^重新计算 CQI的步骤包括: 所述基站#>据获得的信道矩阵、 预编码矩阵、 线性 检测矩阵和 „重新计算 CQI。
15、 一种用户设备 UE, 其特征在于, 包括: 接口模块, 用于接收多个传输点发送的参考信号;
构造模块, 用于针对每个传输点, 根据该传输点发送的参考信号构造信道矩阵 Hij n; 测量模块, 用于测量来自所述多个传输点之外的千扰和系统噪声功率之和 /„; 计算模块,用于根据多个传输点中主传输点的信道矩阵 Η。Λ„和 Ιη计算该主传输点的信 道盾量指示 CQI, 以及针对多个传输点中除主传输点之外的每个协作传输点, 根据主传输 点的 Η。; 和该协作传输点的 计算该协作传输点的信道盾量指示 CQI, 并指示接口模块 将计算出的所述多个传输点的 CQI至少发送给主传输点。
16、 如权利要求 15所述的 UE, 其特征在于, 计算模块还用于根据主传输点的 H。 和
/„计算该主传输点的 CQI增量, 并指示接口模块将计算出的 CQI增量至少发送给主传输 点。
17、 如权利要求 16所述的 UE, 其特征在于, 所述 CQI增量为不考虑协作小区千扰时 的 CQI相对考虑协作小区千扰时的 CQI的增量。
18、 如权利要求 16所述的 UE, 其特征在于, 向主传输点反馈下行信道信息所釆用的 反馈模式和 /或反馈类型中包括 CQI增量值。
19、 如权利要求 18 所述的 UE, 其特征在于, 周期反馈的反馈模式和反馈类型支持
CQI增量信息反馈; 非周期反馈的反馈模式支持 CQI增量信息反馈。
20、 如权利要求 16所述的 UE, 其特征在于, 计算模块根据多个传输点中主传输点的 Η0 .„、 /„和所述多个传输点中协作传输点的用户接收功率之和, 计算该主传输点的信道盾 量指示 CQI。
21、 如权利要求 15所述的 UE, 其特征在于, 接口模块将计算出的每个传输点的 CQI 分别发送给相应的传输点, 以及协作传输点将收到的 CQI转发给主传输点; 或者, 将计算 出的所有传输点的 CQI都直接发送给主传输点。
22、 一种基站, 其特征在于, 包括:
接口模块, 用于接收用户设备 UE发送的 CQI, 该 CQI是根据主传输点 Η。Λ„和 /„计算 得到的, Η。Λ„是根据主传输点发送的参考信号构造的信道矩阵, Ιη是来自主传输点所在传 输点集合之外的千扰和系统噪声功率之和;
控制模块, 用于根据获得的 CQI进行 MCS选择。
23、 如权利要求 22所述的基站, 其特征在于, 当控制模块在收到 CQI后对所述 UE 进行了调度时, 所述基站还包括: 计算模块, 用于重新计算 CQI; 控制模块根据计算得到的 CQI进行 MCS选择。
24、 如权利要求 23 所述的基站, 其特征在于, 接口模块获得多个传输点的信道矩阵
计算模块根据收到的 CQI和获得的多个传输点中主传输点的信道矩阵计算出来自主传 输点所在传输点集合之外的千扰和系统噪声功率之和 „; 根据获得的多个传输点的信道矩 阵、 预编码矩阵和 „重新计算 CQI。
25、 如权利要求 24 所述的基站, 其特征在于, 接口模块从多个传输点处获得信道矩 阵 y.„; 或者, 从 UE处获得关于多个传输点的信道矩阵 y.„。
26、 如权利要求 25所述的基站, 其特征在于, 计算模块还用于根据收到的 CQI对对 应同一传输点的 I¾y.„进行调整, 获得调整后的信道矩阵 .„; 或者
接口模块从多个传输点处获得信道矩阵,是各传输点根据收到的 CQI对对应同一传输 点的 y.„进行调整后的信道矩阵 „。
27、 如权利要求 24所述的基站, 其特征在于, 计算模块根据收到的 CQI和 CQI增量 以及获得的信道矩阵计算出 ϊη
28、 如权利要求 24 所述的基站, 其特征在于, 计算模块根据获得的信道矩阵、 预编 码矩阵、 线性检测矩阵和 „重新计算 CQI。
29、 一种传输点设备, 其特征在于, 包括:
第一接口模块, 用于接收用户设备 UE发送的 CQI ,该 CQI是根据主传输点 Η。Λ„和 Ιη 计算得到的, Η。Λ„是根据主传输点发送的参考信号构造的信道矩阵, Ιη是来自主传输点所 在传输点集合之外的千扰和系统噪声功率之和;
第二接口模块, 用于将收到的 CQI转发给对应的基站, 使基站根据获得的 CQI进行 MCS选择。
30、 如权利要求 29 所述的传输点设备, 其特征在于, 第二接口模块还用于获得关于 多个传输点的信道矩阵 I¾y.„ , 并将获得的信道矩阵发送给对应的基站。
31、 如权利要求 30 所述的传输点设备, 其特征在于, 第二接口模块从其它传输点和 本地获得信道矩阵 I¾y.„; 或者 第二接口模块通过第一接口模块从 UE处获得关于多个传输点的信道矩阵 I¾y.„。
32、 如权利要求 30 所述的传输点设备, 其特征在于, 还包括: 调整模块, 用于根据 收到的 CQI对对应同一传输点的 I¾y.„进行调整, 获得调整后的信道矩阵 „。
33、 如权利要求 31 所述的传输点设备, 其特征在于, 第二接口模块从其它传输点处 获得信道矩阵, 是各传输点根据收到的 CQI对对应同一传输点的 I¾y.„进行调整后的信道矩 阵 "。
PCT/CN2012/079847 2011-08-16 2012-08-08 一种传输cqi的方法及装置 WO2013023543A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201110234923.X 2011-08-16
CN201110234923.XA CN102291740B (zh) 2011-08-16 2011-08-16 一种传输cqi的方法及装置

Publications (1)

Publication Number Publication Date
WO2013023543A1 true WO2013023543A1 (zh) 2013-02-21

Family

ID=45337793

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/079847 WO2013023543A1 (zh) 2011-08-16 2012-08-08 一种传输cqi的方法及装置

Country Status (2)

Country Link
CN (1) CN102291740B (zh)
WO (1) WO2013023543A1 (zh)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102291740B (zh) * 2011-08-16 2014-05-21 电信科学技术研究院 一种传输cqi的方法及装置
CN104081695B (zh) 2012-01-30 2016-11-16 日本电气株式会社 无线电通信系统和方法
WO2013123671A1 (en) * 2012-02-24 2013-08-29 Nec (China) Co., Ltd. Method and apparatus for estimating channel quality information, base station and network central processing device
EP2919541B1 (en) * 2012-11-16 2018-02-28 Huawei Technologies Co., Ltd. Access method and device
CN103905102B (zh) 2012-12-27 2017-02-08 中兴通讯股份有限公司 协作多点数据传输方法及基站
WO2015066890A1 (zh) * 2013-11-08 2015-05-14 华为技术有限公司 一种传输控制方法、装置及系统
CN105634658A (zh) * 2014-10-31 2016-06-01 中国移动通信集团公司 一种进行发送处理的方法、设备及系统
CN106856612B (zh) * 2015-12-09 2020-03-03 中国联合网络通信集团有限公司 一种多点协同通信方法及基站
CN106888062B (zh) * 2015-12-10 2020-04-10 电信科学技术研究院 Cqi估计、sinr确定方法及相关设备
EP3385859A1 (en) * 2017-04-03 2018-10-10 Mitsubishi Electric R & D Centre Europe B.V. Method for building sinr data from power measurements data
CN113301602B (zh) * 2021-05-13 2022-02-08 深圳市云之声科技有限公司 5g智能网关

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101692735A (zh) * 2009-08-20 2010-04-07 中国科学院上海微系统与信息技术研究所 一种协作多点传输场景下的隐式信道反馈方法
US20100239036A1 (en) * 2009-03-18 2010-09-23 Koo Ja Ho METHOD AND APPARATUS FOR TRANSMITTING PRECODING MATRIX INDEX IN A WIRELESS COMMUNICATION SYSTEM USING CoMP SCHEME
CN102036393A (zh) * 2009-09-28 2011-04-27 大唐移动通信设备有限公司 多小区信道信息的确定方法和设备
CN102122977A (zh) * 2010-01-11 2011-07-13 电信科学技术研究院 反馈cqi信息及信道质量估计的方法、用户终端及基站
CN102149130A (zh) * 2011-04-22 2011-08-10 电信科学技术研究院 一种信道质量指示的上报方法、装置及系统
CN102291839A (zh) * 2011-08-16 2011-12-21 电信科学技术研究院 一种cqi信息的传输方法及装置
CN102291740A (zh) * 2011-08-16 2011-12-21 电信科学技术研究院 一种传输cqi的方法及装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100239036A1 (en) * 2009-03-18 2010-09-23 Koo Ja Ho METHOD AND APPARATUS FOR TRANSMITTING PRECODING MATRIX INDEX IN A WIRELESS COMMUNICATION SYSTEM USING CoMP SCHEME
CN101692735A (zh) * 2009-08-20 2010-04-07 中国科学院上海微系统与信息技术研究所 一种协作多点传输场景下的隐式信道反馈方法
CN102036393A (zh) * 2009-09-28 2011-04-27 大唐移动通信设备有限公司 多小区信道信息的确定方法和设备
CN102122977A (zh) * 2010-01-11 2011-07-13 电信科学技术研究院 反馈cqi信息及信道质量估计的方法、用户终端及基站
CN102149130A (zh) * 2011-04-22 2011-08-10 电信科学技术研究院 一种信道质量指示的上报方法、装置及系统
CN102291839A (zh) * 2011-08-16 2011-12-21 电信科学技术研究院 一种cqi信息的传输方法及装置
CN102291740A (zh) * 2011-08-16 2011-12-21 电信科学技术研究院 一种传输cqi的方法及装置

Also Published As

Publication number Publication date
CN102291740B (zh) 2014-05-21
CN102291740A (zh) 2011-12-21

Similar Documents

Publication Publication Date Title
WO2013023543A1 (zh) 一种传输cqi的方法及装置
KR101548577B1 (ko) 채널 품질 지시자의 보고 방법, 장치 및 시스템
JP5845545B2 (ja) 協調マルチポイントシステムにおけるリンク適応
CN108900224A (zh) 通信系统、通信系统中的网络节点、用户设备及方法
JP6054972B2 (ja) 通信システムにおけるフィードバック生成方法及び装置
WO2012146041A1 (zh) 信道状态信息处理方法、装置及系统
WO2014111051A1 (zh) 一种资源调度的方法、系统和设备
KR20120058532A (ko) 협력형 다중 전송에 있어서의 cqi값 결정 방법 및 장치
WO2014012509A1 (zh) 信道质量指示信息上报及确定方法和设备
KR102405408B1 (ko) 전차원 다중 입출력 시스템에서 채널 상태 정보를 송수신하는 방법 및 장치
CN106888062B (zh) Cqi估计、sinr确定方法及相关设备
JP6604378B2 (ja) 適応変調コーディングの方法および装置
CN105450332B (zh) 一种三维信道状态信息确定方法及装置
WO2014048363A1 (zh) 信道状态信息参考资源的指示和测量方法及设备
WO2014139121A1 (zh) 一种调度用户设备的方法及基站
WO2015196589A1 (zh) 终端能力指示参数的反馈、反馈处理方法及装置
US11817929B2 (en) Channel state information measurement method and apparatus and network side device
WO2014139073A1 (zh) 用于数据传输的方法和装置
WO2014169794A1 (zh) 传输调度方法和设备
KR20140114759A (ko) 무선 통신 시스템에서 간섭 제어를 위한 장치 및 방법
WO2014198032A1 (zh) 信道状态信息测量的方法及设备
WO2013170640A1 (zh) 上行传输参数选择方法和设备
WO2010003351A1 (zh) 一种信息调度方法、装置
JP6234714B2 (ja) 基地局装置、ユーザ装置およびセルラーシステム
WO2022083532A1 (zh) Csi计算方法、用户终端及计算机可读存储介质

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12823717

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12823717

Country of ref document: EP

Kind code of ref document: A1