CN108512578A - A kind of channel state information feedback method, device and system - Google Patents

本发明公开了一种信道状态信息反馈方法，包括：基站向目标用户终端发送预激活信令，用以通知所述目标用户终端准备激活多用户叠加传输(MUST)；所述基站向所述目标用户终端发送调度指示信令，用以指示所述目标用户终端传输信道状态信息；所述预激活信息和所述调度指示信令被接收后，由所述目标用户终端根据所述预激活信令和所述调度指示信令确定信道状态信息并反馈给所述基站；所述基站接收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述多用户叠加传输时，根据所述信道状态信息选择所述MUST的传输方式。本发明还公开了一种信道状态信息反馈装置和系统。

The present invention discloses a method for channel state information feedback, comprising: a base station sends a pre-activation signaling to a target user terminal to notify the target user terminal of preparing to activate multi-user superposition transmission (MUST); the base station sends the target user terminal The user terminal sends scheduling indication signaling to instruct the target user terminal to transmit channel state information; after the pre-activation information and the scheduling indication signaling are received, the target user terminal and the scheduling instruction signaling to determine channel state information and feed it back to the base station; the base station receives the channel state information fed back by the target user terminal, determines whether to activate the MUST according to the channel state information, and determines whether to activate the MUST During the multi-user superimposed transmission, the MUST transmission mode is selected according to the channel state information. The invention also discloses a channel state information feedback device and system.

一种信道状态信息反馈方法、装置和系统A channel state information feedback method, device and system

技术领域technical field

本发明涉及无线接入技术，尤其涉及一种信道状态信息反馈方法、装置和系统。The present invention relates to wireless access technology, in particular to a channel state information feedback method, device and system.

背景技术Background technique

在长期演进技术升级版(LTE-A，Long Term Evolution Advanced)系统与第五代移动通信技术(5G，5th-Generation)新空口设计中，非正交接入已经成为一种重要的无线接入方案，同时在第三代合作伙伴计划(3GPP，3rd Generation Partnership Project)R14版本(Rel-14)的标准化中，非正交接入已经被正式确定为一种重要的新型接入方式。In the design of the new air interface of the Long Term Evolution Advanced (LTE-A, Long Term Evolution Advanced) system and the fifth-generation mobile communication technology (5G, 5th-Generation), non-orthogonal access has become an important wireless access At the same time, in the standardization of the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) R14 version (Rel-14), non-orthogonal access has been formally determined as an important new access mode.

在LTE-A中，目前已经支持多用户叠加传输(MUST，Multiple UsersSuperposition Transmission)方案。如图1所示，在MUST传输方案中，基站侧可以在相同的时频域资源上调度两个用户终端(UE，User Equipment)，即被调度的两个UE的数据将会在相同的时频资源上叠加在一起传输。在数据分离方面，远端UE与近端UE透明，即远端UE并不知道近端UE的任何信息。远端UE通过大尺度衰落而弱化近端UE的干扰，从而顺利解调；近端UE则要基于基站(eNB)指示的远端UE的传输信息实现干扰消除。In LTE-A, a Multiple Users Superposition Transmission (MUST, Multiple Users Superposition Transmission) scheme has been supported at present. As shown in Figure 1, in the MUST transmission scheme, the base station can schedule two user terminals (UE, User Equipment) on the same time-frequency domain resource, that is, the data of the two scheduled UEs will be Superimposed on the frequency resources for transmission. In terms of data separation, the far-end UE is transparent to the near-end UE, that is, the far-end UE does not know any information about the near-end UE. The far-end UE weakens the interference of the near-end UE through large-scale fading, so as to successfully demodulate; the near-end UE needs to implement interference cancellation based on the transmission information of the far-end UE indicated by the base station (eNB).

在MUST传输方案中，两个UE在相同的时频资源上被调度。如图1所示，UE1与UE2分别被称为近端UE与远端UE。在近端UE和远端UE的调度中，基站为近端UE、即UE1配置远端UE、即UE2的传输信息，所述传输信息用来帮助近端UE正确接收自身的数据。而对于远端UE，基站一般不需要配置近端UE的信息，即近端UE对远端UE是透明的。In the MUST transmission scheme, two UEs are scheduled on the same time-frequency resource. As shown in FIG. 1 , UE1 and UE2 are respectively referred to as a near-end UE and a far-end UE. In the scheduling of the near-end UE and the far-end UE, the base station configures the transmission information of the far-end UE, ie, UE2, for the near-end UE, ie, UE1, and the transmission information is used to help the near-end UE correctly receive its own data. For the far-end UE, the base station generally does not need to configure the information of the near-end UE, that is, the near-end UE is transparent to the far-end UE.

目前，在MUST传输机制方面，有多种传输机制与参数配置并存，具体包括以下三个方面：At present, in terms of the MUST transmission mechanism, there are multiple transmission mechanisms and parameter configurations coexisting, including the following three aspects:

第一，在传输方式方面，MUST有三种传输方式：First, in terms of transmission methods, MUST has three transmission methods:

方式1：UE1(近端UE)与UE2(远端UE)基于相同的预编码方案叠加传输；Method 1: UE1 (near-end UE) and UE2 (far-end UE) are superimposed and transmitted based on the same precoding scheme;

方式2：UE1(近端UE)与UE2(远端UE)基于分集方案(相同的预编码)叠加传输；Mode 2: UE1 (near-end UE) and UE2 (remote UE) are superimposed and transmitted based on the diversity scheme (same precoding);

方式3：UE1(近端UE)与UE2(远端UE)基于不同的预编码方案叠加传输。Mode 3: UE1 (near-end UE) and UE2 (far-end UE) are superimposed and transmitted based on different precoding schemes.

第二，MUST传输还支持远端UE与近端UE采用不同的调制方式组合，当远端UE采用正交相移键控(QPSK，Quadrature Phase Shift Keyin)调制方式，而近端UE可以选择QPSK、正交幅度调制(16QAM，Quadrature Amplitude Modulation)、相正交振幅调制(64QAM，Quadrature Amplitude Modulation)三种调制方式；Second, MUST transmission also supports the combination of different modulation modes between the far-end UE and the near-end UE. When the far-end UE adopts the quadrature phase shift keying (QPSK, Quadrature Phase Shift Keyin) modulation method, the near-end UE can choose QPSK , Quadrature Amplitude Modulation (16QAM, Quadrature Amplitude Modulation), Phase Quadrature Amplitude Modulation (64QAM, Quadrature Amplitude Modulation) three modulation methods;

即对于近端UE与远端UE而言，可以支持的调制方式组合包括以下几种：(QPSK，QPSK)、(16QAM，QPSK)、(64QAM，QPSK)。That is, for the near-end UE and the far-end UE, the supported modulation combinations include the following: (QPSK, QPSK), (16QAM, QPSK), (64QAM, QPSK).

第三，近端UE与远端UE之间还有多种功率比的配置，从而实现不同的组合星座图调制。Third, there are multiple configurations of power ratios between the near-end UE and the far-end UE, so as to realize different combined constellation diagram modulations.

基于以上三个方面的传输机制与参数配置的描述，为实施MUST传输方案，eNB需要配置的参数包括传输方式(方式1、方式2、方式3)、调制方式组合((QPSK，QPSK)、(16QAM，QPSK)、(64QAM，QPSK))，以及近端UE与远端UE之间的功率比。Based on the description of the transmission mechanism and parameter configuration in the above three aspects, in order to implement the MUST transmission scheme, the parameters that eNB needs to configure include transmission mode (mode 1, mode 2, mode 3), modulation mode combination ((QPSK, QPSK), ( 16QAM, QPSK), (64QAM, QPSK)), and the power ratio between the near-end UE and the far-end UE.

为了获得良好的MUST传输性能，eNB必须合理配置以上参数，而要实现参数的合理配置，eNB需要基于准确的信道状态信息，这就需要近端UE反馈比较准确而全面的信道状态信息。In order to obtain good MUST transmission performance, the eNB must reasonably configure the above parameters. To achieve a reasonable configuration of the parameters, the eNB needs to be based on accurate channel state information, which requires the near-end UE to feed back relatively accurate and comprehensive channel state information.

同时，在MUST传输过程中，近端UE与远端UE的信道条件会不断发生变化。因此，eNB必须及时了解信道的变化，并基于信道变化的信息灵活地配置MUST传输参数与配对用户，才能实现系统性能的优化。At the same time, during the MUST transmission process, the channel conditions of the near-end UE and the far-end UE will constantly change. Therefore, eNB must keep abreast of channel changes and flexibly configure MUST transmission parameters and paired users based on channel change information in order to optimize system performance.

如果UE反馈的信道状态信息不准确，则eNB所配置的MUST参数就会与UE的信道不匹配，这必将导致系统性能下降。因此，在MUST的调度与传输中，近端UE反馈的信道状态信息的准确性与全面性是保证MUST调度与传输性能优化的关键。If the channel state information fed back by the UE is inaccurate, the MUST parameters configured by the eNB will not match the channel of the UE, which will definitely lead to system performance degradation. Therefore, in MUST scheduling and transmission, the accuracy and comprehensiveness of the channel state information fed back by the near-end UE is the key to ensure MUST scheduling and transmission performance optimization.

而在当前的LTE反馈机制中，协议仅支持单用户多输入多输出系统(MIMO，Multiple-Input Multiple-Output)反馈。在单用户MIMO的反馈机制中，UE反馈的信道状态信息(CSI，Channel State Information)仅能提供单个UE的预编码矩阵指示(PMI，Precoding Matrix Indicator)、信道质量指示(CQI，Channel Quality Indicator)、秩指示(RI，rank indication)。对于MUST而言，单用户的信道状态信息并不全面，这些信息也不足以为eNB提供比较准确的信道状态信息，这就导致eNB也无法基于这些信道状态信息进行准确的MUST调度。However, in the current LTE feedback mechanism, the protocol only supports single-user Multiple-Input Multiple-Output (MIMO, Multiple-Input Multiple-Output) feedback. In the single-user MIMO feedback mechanism, the channel state information (CSI, Channel State Information) fed back by the UE can only provide the precoding matrix indicator (PMI, Precoding Matrix Indicator) and channel quality indicator (CQI, Channel Quality Indicator) of a single UE. , rank indication (RI, rank indication). For MUST, the channel state information of a single user is not comprehensive, and this information is not enough to provide more accurate channel state information for eNB, which makes it impossible for eNB to perform accurate MUST scheduling based on these channel state information.

发明内容Contents of the invention

为解决现有存在的技术问题，本发明实施例提供一种信道状态信息反馈方法、装置和系统，解决现有技术中存在的反馈方式不适合MUST传输导致用户终端反馈的信道状态信息不准确，基站不能准确实施MUST调度的问题。In order to solve the existing technical problems, the embodiments of the present invention provide a channel state information feedback method, device and system to solve the problem that the feedback mode in the prior art is not suitable for MUST transmission and the channel state information fed back by the user terminal is inaccurate. The problem that the base station cannot accurately implement MUST scheduling.

为达到上述目的，本发明的技术方案是这样实现的：In order to achieve the above object, technical solution of the present invention is achieved in that way:

本发明实施例提供了一种信道状态信息反馈方法，所述方法包括：An embodiment of the present invention provides a channel state information feedback method, the method comprising:

基站向目标用户终端发送预激活信令，用以通知所述目标用户终端准备激活MUST；所述目标用户终端为基站在相同时频域资源上调度两个用户终端中距离基站侧近的用户终端；The base station sends pre-activation signaling to the target user terminal to notify the target user terminal that it is ready to activate the MUST; the target user terminal is the user terminal closest to the base station side among the two user terminals scheduled by the base station on the same time-frequency domain resources ;

所述基站向所述目标用户终端发送调度指示信令，用以指示所述目标用户终端传输信道状态信息；所述预激活信息和所述调度指示信令被接收后，由所述目标用户终端根据所述预激活信令和所述调度指示信令确定信道状态信息并反馈给所述基站；The base station sends scheduling indication signaling to the target user terminal to instruct the target user terminal to transmit channel state information; after the pre-activation information and the scheduling indication signaling are received, the target user terminal determining channel state information according to the pre-activation signaling and the scheduling indication signaling and feeding it back to the base station;

所述基站接收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述MUST时，根据所述信道状态信息选择所述MUST的传输方式。The base station receives the channel state information fed back by the target user terminal, determines whether to activate the MUST according to the channel state information, and selects a transmission mode of the MUST according to the channel state information when determining to activate the MUST .

上述方案中，所述信道状态信息，包括：CQI；In the above solution, the channel state information includes: CQI;

所述预激活信令或所述调度指示信令，包括：所述MUST的传输方式、候选的功率比、调制方式组合、传输所述CQI的周期、所述CQI的数量、PMI的数量。The pre-activation signaling or the scheduling indication signaling includes: the transmission mode of the MUST, the candidate power ratio, the combination of modulation modes, the period for transmitting the CQI, the number of the CQI, and the number of PMIs.

上述方案中，所述根据所述信道状态信息确定是否激活所述多用户叠加传输，包括：In the above solution, the determining whether to activate the multi-user overlay transmission according to the channel state information includes:

根据反馈的所述信道状态信息确定吞吐率，判断激活所述多用户叠加传输的所述吞吐率是否高于未激活所述多用户叠加传输时的吞吐率，激活所述多用户叠加传输的所述吞吐率高于未激活所述多用户叠加传输时的吞吐率，则确定激活所述多用户叠加传输。Determine the throughput rate according to the fed-back channel state information, determine whether the throughput rate of the activated multi-user superimposed transmission is higher than the throughput rate when the multi-user superimposed transmission is not activated, and activate the multi-user superimposed transmission. If the throughput rate is higher than the throughput rate when the multi-user overlay transmission is not activated, it is determined to activate the multi-user overlay transmission.

上述方案中，所述选择所述多用户叠加传输的传输方式，包括：In the above solution, the selection of the transmission mode of the multi-user overlay transmission includes:

根据所述信道状态信息，确定不同传输方式时的所述目标用户终端和所述远端用户终端的性能，选择所述目标用户终端和所述远端用户终端的性能最优时的传输方式。According to the channel state information, determine the performance of the target user terminal and the remote user terminal in different transmission modes, and select the transmission mode when the performance of the target user terminal and the remote user terminal is optimal.

本发明实施例提供了一种信道状态信息反馈方法，所述方法包括：An embodiment of the present invention provides a channel state information feedback method, the method comprising:

基站向目标用户终端发送预激活信令，用以通知所述目标用户终端准备激活MUST；The base station sends a pre-activation signaling to the target user terminal to notify the target user terminal of preparing to activate the MUST;

所述基站向所述目标用户终端发送调度指示信令，用以指示所述目标用户终端传输信道状态信息；The base station sends scheduling indication signaling to the target user terminal to instruct the target user terminal to transmit channel state information;

所述目标用户终端接收预激活信息和所述调度指示信令后，根据所述预激活信令和所述调度指示信令确定信道状态信息并反馈给所述基站；After receiving the pre-activation information and the scheduling indication signaling, the target user terminal determines channel state information according to the pre-activation signaling and the scheduling indication signaling and feeds it back to the base station;

所述基站接收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述MUST时，根据所述信道状态信息选择所述MUST的传输方式。The base station receives the channel state information fed back by the target user terminal, determines whether to activate the MUST according to the channel state information, and selects a transmission mode of the MUST according to the channel state information when determining to activate the MUST .

上述方案中，所述信道状态信息，包括：CQI；In the above solution, the channel state information includes: CQI;

所述预激活信令或所述调度指示信令，包括：所述MUST的传输方式、候选的功率比、调制方式组合、传输所述CQI的周期、所述CQI的数量、PMI的数量；The pre-activation signaling or the scheduling indication signaling includes: the transmission mode of the MUST, the candidate power ratio, the combination of modulation modes, the period for transmitting the CQI, the number of the CQI, and the number of PMIs;

所述目标用户终端根据所述预激活信令和所述调度指示信令确定信道状态信息，包括：The target user terminal determines channel state information according to the pre-activation signaling and the scheduling indication signaling, including:

所述目标用户终端根据所述传输方式选择所述目标用户终端的预编码矩阵和远端用户终端的预编码矩阵，根据所述候选的功率比选择使用的功率比；The target user terminal selects the precoding matrix of the target user terminal and the precoding matrix of the remote user terminal according to the transmission mode, and selects a power ratio to be used according to the candidate power ratio;

所述目标用户终端测量获得信道估计值和噪声功率后，结合所述功率比、所述目标用户终端的预编码矩阵和远端用户终端的预编码矩阵，计算获得至少一个CQI。After the target user terminal measures and obtains the channel estimation value and noise power, calculate and obtain at least one CQI by combining the power ratio, the precoding matrix of the target user terminal and the precoding matrix of the remote user terminal.

上述方案中，所述调度指示信息，还包括：物理上行链路控制信道物理上行链路控制信道(PUCCH，Physical Uplink Control Channel)或物理上行共享信道(PUSCH，Physical Uplink Shared Channel)的资源位置；In the above solution, the scheduling indication information further includes: a physical uplink control channel physical uplink control channel (PUCCH, Physical Uplink Control Channel) or a physical uplink shared channel (PUSCH, Physical Uplink Shared Channel) resource position;

所述信道状态信息，还包括：PMI；The channel state information also includes: PMI;

所述目标用户终端将信道状态信息反馈给所述基站，包括：The target user terminal feeds back channel state information to the base station, including:

根据所述CQI的数量提取至少一个CQI作为所述信道状态信息；或者，根据所述CQI的数量提取至少一个CQI，并根据所述PMI的数量提取至少一个PMI，将提取的CQI和PMI作为所述信道状态信息；Extracting at least one CQI according to the number of CQIs as the channel state information; or extracting at least one CQI according to the number of CQIs, and extracting at least one PMI according to the number of PMIs, and using the extracted CQI and PMI as the channel state information the channel state information;

根据所述传输方式、所述远端用户终端与所述目标用户终端的调制方式，按照所述传输所述CQI的周期，在指定的所述PUCCH或PUSCH的资源位置上反馈所述信道状态信息。According to the transmission mode, the modulation mode of the remote user terminal and the target user terminal, and according to the cycle of transmitting the CQI, feed back the channel state information at the designated resource position of the PUCCH or PUSCH .

本发明实施例提供了一种信道状态信息反馈装置，所述装置包括：第一发送模块、第二发送模块和确定模块；其中，An embodiment of the present invention provides a channel state information feedback device, the device includes: a first sending module, a second sending module and a determining module; wherein,

所述第一发送模块，用于向目标用户终端发送预激活信令，用以通知所述目标用户终端准备激活MUST；所述目标用户终端为基站在相同时频域资源上调度两个用户终端中距离基站侧近的用户终端；The first sending module is configured to send pre-activation signaling to the target user terminal to notify the target user terminal that it is ready to activate MUST; the target user terminal is for the base station to schedule two user terminals on the same time-frequency domain resource A user terminal close to the base station;

所述第二发送模块，用于向所述目标用户终端发送调度指示信令，用以指示所述目标用户终端传输信道状态信息；所述预激活信息和所述调度指示信令被接收后，由所述目标用户终端根据所述预激活信令和所述调度指示信令确定信道状态信息并反馈给所述基站；The second sending module is configured to send scheduling indication signaling to the target user terminal to instruct the target user terminal to transmit channel state information; after the pre-activation information and the scheduling indication signaling are received, determining channel state information by the target user terminal according to the pre-activation signaling and the scheduling indication signaling and feeding it back to the base station;

所述确定模块，用于收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述MUST时，根据所述信道状态信息选择所述MUST的传输方式。The determination module is configured to receive the channel state information fed back by the target user terminal, determine whether to activate the MUST according to the channel state information, and select the MUST according to the channel state information when it is determined to activate the MUST. The transmission method of MUST.

上述方案中，所述信道状态信息，包括：CQI；In the above solution, the channel state information includes: CQI;

所述预激活信令或所述调度指示信令，包括：所述MUST的传输方式、候选的功率比、调制方式组合、传输所述CQI的周期、所述CQI的数量、PMI的数量。The pre-activation signaling or the scheduling indication signaling includes: the transmission mode of the MUST, the candidate power ratio, the combination of modulation modes, the period for transmitting the CQI, the number of the CQI, and the number of PMIs.

上述方案中，所述确定模块，具体用于：根据反馈的所述信道状态信息确定吞吐率，判断激活所述多用户叠加传输的所述吞吐率是否高于未激活所述多用户叠加传输时的吞吐率，激活所述多用户叠加传输的所述吞吐率高于未激活所述多用户叠加传输时的吞吐率，则确定激活所述多用户叠加传输。In the above solution, the determination module is specifically configured to: determine the throughput rate according to the fed-back channel state information, and determine whether the throughput rate of the activated multi-user superimposed transmission is higher than that of the non-activated multi-user superimposed transmission If the throughput rate of the activated multi-user superimposed transmission is higher than the throughput when the multi-user superimposed transmission is not activated, then it is determined to activate the multi-user superimposed transmission.

上述方案中，所述确定模块，具体用于：根据所述信道状态信息，确定不同传输方式时的所述目标用户终端和所述远端用户终端的性能，选择所述目标用户终端和所述远端用户终端的性能最优时的传输方式。In the above solution, the determining module is specifically configured to: determine the performance of the target user terminal and the remote user terminal in different transmission modes according to the channel state information, and select the target user terminal and the remote user terminal The transmission mode when the performance of the remote user terminal is optimal.

本发明实施例提供了一种信道状态信息反馈系统，所述系统，包括：基站和目标用户终端；其中，An embodiment of the present invention provides a channel state information feedback system, the system includes: a base station and a target user terminal; wherein,

所述基站，用于向目标用户终端发送预激活信令，用以通知所述目标用户终端准备激活MUST，所述目标用户终端为基站在相同时频域资源上调度两个用户终端中距离基站侧近的用户终端；向所述目标用户终端发送调度指示信令，用以指示所述目标用户终端传输信道状态信息；及，接收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述MUST时，根据所述信道状态信息选择所述MUST的传输方式；The base station is configured to send pre-activation signaling to the target user terminal to notify the target user terminal that it is ready to activate the MUST, and the target user terminal is a mid-distance base station for the base station to schedule two user terminals on the same time-frequency domain resources a nearby user terminal; sending scheduling indication signaling to the target user terminal to instruct the target user terminal to transmit channel state information; and receiving the channel state information fed back by the target user terminal, according to the The channel state information determines whether to activate the MUST, and when determining to activate the MUST, selects the transmission mode of the MUST according to the channel state information;

所述目标用户终端，用于在接收预激活信息和所述调度指示信令后，根据所述预激活信令和所述调度指示信令确定信道状态信息并反馈给所述基站。The target user terminal is configured to, after receiving the pre-activation information and the scheduling indication signaling, determine channel state information according to the pre-activation signaling and the scheduling indication signaling and feed it back to the base station.

上述方案中，所述信道状态信息，包括：CQI；In the above solution, the channel state information includes: CQI;

所述预激活信令或所述调度指示信令，包括：所述MUST的传输方式、候选的功率比、调制方式组合、传输所述CQI的周期、所述CQI的数量、PMI的数量；The pre-activation signaling or the scheduling indication signaling includes: the transmission mode of the MUST, the candidate power ratio, the combination of modulation modes, the period for transmitting the CQI, the number of the CQI, and the number of PMIs;

所述目标用户终端，具体用于：根据所述传输方式选择所述目标用户终端的预编码矩阵和远端用户终端的预编码矩阵，根据所述候选的功率比选择使用的功率比；测量获得信道估计值和噪声功率后，结合所述功率比、所述目标用户终端的预编码矩阵和远端用户终端的预编码矩阵，计算获得至少一个CQI。The target user terminal is specifically configured to: select the precoding matrix of the target user terminal and the precoding matrix of the remote user terminal according to the transmission mode, and select a power ratio to be used according to the candidate power ratio; measure and obtain After the channel estimation value and the noise power, at least one CQI is calculated and obtained by combining the power ratio, the precoding matrix of the target user terminal and the precoding matrix of the remote user terminal.

上述方案中，所述调度指示信息，还包括：PUCCH或PUSCH的资源位置；In the above solution, the scheduling indication information further includes: the resource position of PUCCH or PUSCH;

所述信道状态信息，还包括：PMI；The channel state information also includes: PMI;

所述目标用户终端，具体用于：根据所述CQI的数量提取至少一个CQI作为所述信道状态信息；或者，根据所述CQI的数量提取至少一个CQI，并根据所述PMI的数量提取至少一个PMI，将提取的CQI和PMI作为所述信道状态信息；The target user terminal is specifically configured to: extract at least one CQI according to the number of CQIs as the channel state information; or extract at least one CQI according to the number of CQIs, and extract at least one CQI according to the number of PMIs PMI, using the extracted CQI and PMI as the channel state information;

根据所述传输方式、所述远端用户终端与所述目标用户终端的调制方式，按照所述传输所述CQI的周期，在指定的所述PUCCH或PUSCH的资源位置上反馈所述信道状态信息。According to the transmission mode, the modulation mode of the remote user terminal and the target user terminal, and according to the cycle of transmitting the CQI, feed back the channel state information at the designated resource position of the PUCCH or PUSCH .

本发明实施例所提供的信道状态信息反馈方法、装置和系统，基站向目标用户终端发送预激活信令，用以通知所述目标用户终端准备激活MUST；所述目标用户终端为基站在相同时频域资源上调度两个用户终端中距离基站侧近的用户终端；所述基站向所述目标用户终端发送调度指示信令，用以指示所述目标用户终端传输信道状态信息；所述预激活信息和所述调度指示信令被接收后，由所述目标用户终端根据所述预激活信令和所述调度指示信令确定信道状态信息并反馈给所述基站；所述基站接收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述多用户叠加传输时，根据所述信道状态信息选择所述MUST的传输方式。本发明实施例提供的方法、装置和系统，克服了现有LTE-A中存在的反馈方式不适合MUST传输，进而导致UE反馈的信道质量信息不够准确、基站不能准确实施MUST调度、系统性能下降的问题；较大幅度提高目标UE反馈的信道状态信息的全面性，为基站提供更加准确的信道状态信息。基于更加准确的信道状态信息，基站可以更加准确地实施MUST传输中的远端用户终端与目标用户终端的配对，进行比较优化的MUST传输方式的选择与传输参数的配置，从而获得较好的系统性能。In the channel state information feedback method, device and system provided by the embodiments of the present invention, the base station sends a pre-activation signaling to the target user terminal to notify the target user terminal that it is ready to activate the MUST; the target user terminal is the base station at the same time Scheduling the user terminal closest to the base station among the two user terminals on the frequency domain resource; the base station sends a scheduling indication signaling to the target user terminal to instruct the target user terminal to transmit channel state information; the pre-activation After the information and the scheduling indication signaling are received, the target user terminal determines channel state information according to the pre-activation signaling and the scheduling indication signaling and feeds it back to the base station; the base station receives the target The channel state information fed back by the user terminal determines whether to activate the MUST according to the channel state information, and selects the transmission mode of the MUST according to the channel state information when determining to activate the multi-user overlay transmission. The method, device and system provided by the embodiments of the present invention overcome the fact that the existing feedback mode in LTE-A is not suitable for MUST transmission, which leads to inaccurate channel quality information fed back by the UE, inability of the base station to accurately implement MUST scheduling, and system performance degradation problems; greatly improve the comprehensiveness of the channel state information fed back by the target UE, and provide more accurate channel state information for the base station. Based on more accurate channel state information, the base station can more accurately implement the pairing between the remote user terminal and the target user terminal in MUST transmission, and perform a more optimized selection of MUST transmission mode and configuration of transmission parameters, thereby obtaining a better system performance.

附图说明Description of drawings

图1为一种MUST传输系统的结构示意图；Fig. 1 is the structural representation of a kind of MUST transmission system;

图2为本发明实施例提供的一种信道状态信息反馈方法的流程示意图；FIG. 2 is a schematic flowchart of a channel state information feedback method provided by an embodiment of the present invention;

图3为本发明实施例提供的一种信道状态信息反馈装置的结构示意图；FIG. 3 is a schematic structural diagram of a channel state information feedback device provided by an embodiment of the present invention;

图4为本发明实施例提供的另一种信道状态信息反馈方法的流程示意图；FIG. 4 is a schematic flowchart of another channel state information feedback method provided by an embodiment of the present invention;

图5为本发明实施例提供的一种信道状态信息反馈系统的结构示意图；FIG. 5 is a schematic structural diagram of a channel state information feedback system provided by an embodiment of the present invention;

图6为本发明实施例提供的再一种信道状态信息反馈方法的流程示意图。FIG. 6 is a schematic flowchart of another channel state information feedback method provided by an embodiment of the present invention.

具体实施方式Detailed ways

在本发明的各种实施例中，基站向目标用户终端发送预激活信令，用以通知所述目标用户终端准备激活MUST；所述基站向所述目标用户终端发送调度指示信令，用以指示所述目标用户终端传输信道状态信息；所述预激活信息和所述调度指示信令被接收后，由所述目标用户终端根据所述预激活信令和所述调度指示信令确定信道状态信息并反馈给所述基站；所述基站接收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述多用户叠加传输时，根据所述信道状态信息选择所述MUST的传输方式。In various embodiments of the present invention, the base station sends pre-activation signaling to the target user terminal to notify the target user terminal that it is ready to activate MUST; the base station sends scheduling indication signaling to the target user terminal to Instructing the target user terminal to transmit channel state information; after the pre-activation information and the scheduling indication signaling are received, the target user terminal determines the channel state according to the pre-activation signaling and the scheduling indication signaling information and feed it back to the base station; the base station receives the channel state information fed back by the target user terminal, determines whether to activate the MUST according to the channel state information, and determines to activate the multi-user superimposed transmission according to the The channel state information selects the transmission mode of the MUST.

下面结合实施例对本发明再作进一步详细的说明。The present invention will be described in further detail below in conjunction with the examples.

图2为本发明实施例提供的一种信道状态信息反馈方法的流程示意图；如图2所示，所述方法，包括：Fig. 2 is a schematic flowchart of a channel state information feedback method provided by an embodiment of the present invention; as shown in Fig. 2, the method includes:

步骤101：eNB向目标UE发送MUST的预激活信令，用以通知所述目标用户终端准备激活MUST；Step 101: the eNB sends a MUST pre-activation signaling to the target UE to notify the target user terminal of preparing to activate the MUST;

这里，所述目标用户终端为基站在相同时频域资源上调度两个用户终端中距离基站侧近的用户终端；Here, the target user terminal is the user terminal closest to the base station side among the two user terminals scheduled by the base station on the same time-frequency domain resource;

基站在相同时频域资源上调度两个用户终端中距离基站侧远的用户终端，这里称为远端用户终端。The base station schedules the user terminal far from the base station side among the two user terminals on the same time-frequency domain resource, which is referred to as a remote user terminal here.

所述基站，用于调度目标UE与远端UE；所述基站基于自身所获取的信道状态信息，可以执行MUST传输模式的选择和MUST用户的配对。The base station is used to schedule the target UE and the remote UE; the base station can perform the selection of the MUST transmission mode and the pairing of the MUST users based on the channel state information acquired by itself.

所述预激活信令，用于指示UE准备激活MUST操作；这里，基站将MUST的预激活信令发送给所述目标UE，用于通知所述目标UE准备激活MUST操作。这里，所述预激活信令可以采用无线资源控制(RRC，Radio Resource Control)信令。The pre-activation signaling is used to instruct the UE to prepare to activate the MUST operation; here, the base station sends the MUST pre-activation signaling to the target UE to notify the target UE to prepare to activate the MUST operation. Here, the pre-activation signaling may use Radio Resource Control (RRC, Radio Resource Control) signaling.

所述预激活信令对应的信元(IE)可以放在PhysicalConfigDedicated与PhysicalConfigDedicatedSCell-r10下，用以指示用户终端预激活MUST。The information elements (IEs) corresponding to the pre-activation signaling may be placed under PhysicalConfigDedicated and PhysicalConfigDedicatedSCell-r10 to instruct the user terminal to pre-activate MUST.

步骤102：所述基站向所述目标用户终端发送调度指示信令(DCI，DownlinkControl Information)，用以指示所述目标用户终端传输信道状态信息；Step 102: The base station sends a scheduling indication signaling (DCI, Downlink Control Information) to the target user terminal to instruct the target user terminal to transmit channel state information;

所述预激活信息和所述调度指示信令被接收后，由所述目标用户终端根据所述预激活信令和所述调度指示信令确定信道状态信息并反馈给所述基站。After the pre-activation information and the scheduling indication signaling are received, the target user terminal determines channel state information according to the pre-activation signaling and the scheduling indication signaling and feeds it back to the base station.

具体地，所述信道状态信息，包括：CQI；Specifically, the channel state information includes: CQI;

所述预激活信令或所述调度指示信令，可以包括：传输CQI的周期、CQI的数量、PMI的数量、CQI的传输方式、候选的功率比和调制方式组合；The pre-activation signaling or the scheduling indication signaling may include: the period of transmitting CQI, the number of CQI, the number of PMI, the transmission mode of CQI, the candidate power ratio and the combination of modulation modes;

这里，所述候选的功率比为所述远端用户终端与所述目标用户终端的功率比。Here, the candidate power ratio is a power ratio between the remote user terminal and the target user terminal.

这里，所述CQI的传输方式，包括：方式1(case1)、方式2(case2)、方式3(case3)；其中，Here, the transmission mode of the CQI includes: mode 1 (case1), mode 2 (case2), mode 3 (case3); wherein,

case1：目标UE与远端UE基于相同的预编码方案叠加传输；case1: The target UE and the remote UE are based on the same precoding scheme for superimposed transmission;

case2：目标UE与远端UE基于相同的预编码叠加传输；case2: The target UE and the remote UE are based on the same precoding superposition transmission;

case3：目标UE与远端UE基于不同的预编码方案叠加传输。case3: The target UE and the remote UE are superimposed and transmitted based on different precoding schemes.

这里，远端UE与目标UE采用不同的调制方式组合。对于目标UE与远端UE而言，所述调制方式组合，可以包括：(QPSK，QPSK)、(16QAM，QPSK)、(64QAM，QPSK)。Here, the remote UE and the target UE adopt different combinations of modulation schemes. For the target UE and the remote UE, the combination of modulation schemes may include: (QPSK, QPSK), (16QAM, QPSK), (64QAM, QPSK).

具体来说，所述预激活信令可由RRC信令实现，配置所述预激活信令的方式如下：Specifically, the pre-activation signaling can be implemented by RRC signaling, and the manner of configuring the pre-activation signaling is as follows:

must-Enabled-r14 ENUMERATED{true}must-Enabled-r14 ENUMERATED{true}

说明：true表示预激活MUST；Description: true means pre-activation MUST;

must-Case ENUMERATED{0 1 2}must-Case ENUMERATED{0 1 2}

说明：0、1、2分别表示MUST的CQI传输方式case1、case2、case3；Note: 0, 1, and 2 respectively represent the CQI transmission modes case1, case2, and case3 of MUST;

must-CQI ENUMERATED{0 1 2 3}must-CQI ENUMERATED{0 1 2 3}

说明：0、1、2、3为反馈的CQI数量；Note: 0, 1, 2, 3 are the number of CQI feedback;

must-Powerratio ENUMERATED{0 1 2 3 4 5}must-Powerratio ENUMERATED{0 1 2 3 4 5}

说明：0、1、2、3、4、5分别为功率比的指示，分别对应不同的功率比比值；Note: 0, 1, 2, 3, 4, 5 are indications of power ratio, corresponding to different power ratio ratios;

must-Modumod ENUMERATED{0 1 2}must-Modumod ENUMERATED{0 1 2}

说明：0、1、2分别为调制方式组合，分别对应着(QPSK，QPSK)(16QAM，QPSK)(64QAM，QPSK)Explanation: 0, 1, and 2 are modulation combinations, corresponding to (QPSK, QPSK) (16QAM, QPSK) (64QAM, QPSK)

must-Pmi ENUMERATED{0 1 2 3}must-Pmi ENUMERATED{0 1 2 3}

说明：0、1、2、3为反馈的PMI数量的指示，分别对应不同的PMI数量。Note: 0, 1, 2, and 3 are indications of the number of PMIs to be fed back, corresponding to different PMI numbers.

需要说明的是，以上信息可以包含在所述预激活信令中传输，也可以包含在所述调度指示信令中传输，不作限定。It should be noted that the above information may be included and transmitted in the pre-activation signaling, and may also be included and transmitted in the scheduling indication signaling, which is not limited.

具体地，所述调度指示信令作为下行控制指令，用以向所述目标UE发送反馈多个CQI的指示。Specifically, the scheduling instruction signaling is used as a downlink control instruction to send an instruction to feed back multiple CQIs to the target UE.

这里，PMI/RI/CQI的上行反馈类型分为以下两种：Here, the uplink feedback types of PMI/RI/CQI are divided into the following two types:

周期反馈，主要承载在PUCCH上的反馈；Periodic feedback, which is mainly carried on the PUCCH;

非周期反馈，承载在PUSCH上的反馈。Aperiodic feedback, the feedback carried on the PUSCH.

所述调度指示信令，还包括：PUCCH或PUSCH的资源位置(时频资源)；The scheduling instruction signaling also includes: the resource position (time-frequency resource) of PUCCH or PUSCH;

这里，所述基站通过调度指示信令通知所述目标UE在指定的PUCCH或PUSCH的资源位置反馈多个CQI、PMI。Here, the base station notifies the target UE to feed back multiple CQIs and PMIs at a designated resource position of the PUCCH or PUSCH through scheduling instruction signaling.

例如，所述PUCCH的资源位置的配置方式如下式(1)所示：For example, the configuration mode of the resource location of the PUCCH is shown in the following formula (1):

n_PUCCH＝n_CCE+N⁽¹⁾ (1)n _PUCCH = n _CCE + N ⁽¹⁾ (1)

其中，n_PUCCH为CQI在PUCCH上的资源位置，n_CCE为所调度的远端UE的物理下行控制信道(PDCCH，Physical Downlink Control Channel)的控制信道单元(CCE，Control ChannelElement)号码，N⁽¹⁾为高层配置的参数。Among them, n _PUCCH is the resource location of CQI on PUCCH, n _CCE is the control channel element (CCE, Control ChannelElement) number of the Physical Downlink Control Channel (PDCCH, Physical Downlink Control Channel) of the remote UE being scheduled, N ^{(1 )} is a parameter configured by the upper layer.

具体地，基于MUST的原理，由于在相同的时频资源上叠加了干扰UE。两个UE(即目标UE和远端UE)的数据传输基于不同的功率比，两个UE的所述功率比可以参考当前协议(LTE-A或5G的协议)的规定来选择。Specifically, based on the principle of MUST, the interfering UE is superimposed on the same time-frequency resource. The data transmission of the two UEs (ie, the target UE and the remote UE) is based on different power ratios, and the power ratio of the two UEs can be selected with reference to the current protocol (LTE-A or 5G protocol).

两个UE的预编码矩阵也可以不同，这里，所述预编码矩阵可以基于规定的码本(LTE-A或5G的码本)与传输方式来确定。The precoding matrices of the two UEs may also be different. Here, the precoding matrix may be determined based on a prescribed codebook (LTE-A or 5G codebook) and a transmission mode.

具体地，所述由目标用户终端根据所述预激活信令和所述调度指示信令确定信道状态信息，包括：Specifically, the determining the channel state information by the target user terminal according to the pre-activation signaling and the scheduling indication signaling includes:

所述目标UE根据接收的所述传输方式分别确定所述目标UE的预编码矩阵和远端UE的预编码矩阵；The target UE respectively determines a precoding matrix of the target UE and a precoding matrix of the remote UE according to the received transmission mode;

所述目标UE根据接收的所述候选的功率比选择当前使用的功率比；The target UE selects a currently used power ratio according to the received candidate power ratio;

所述目标UE测量获得目标UE的信道估计值和噪声功率；The target UE measures and obtains the channel estimation value and noise power of the target UE;

根据所述目标UE的预编码矩阵、远端UE的预编码矩阵、当前使用的所述功率比、所述目标UE的信道估计值和噪声功率，计算获得至少一个CQI。Calculate and obtain at least one CQI according to the precoding matrix of the target UE, the precoding matrix of the remote UE, the currently used power ratio, the channel estimation value of the target UE, and the noise power.

具体地，所述信道状态信息，还可以包括：PMI、RI和/或功率比推荐值等，由所述目标UE根据接收的信息计算获得。例如：Specifically, the channel state information may further include: PMI, RI and/or recommended power ratio, etc., which are calculated and obtained by the target UE according to the received information. E.g:

由所述目标用户终端根据所述预激活信令和所述调度指示信令确定PMI，包括：Determining the PMI by the target user terminal according to the pre-activation signaling and the scheduling indication signaling includes:

所述目标UE基于容量最优或信号与干扰加噪声比(SINR，Signal toInterference plus Noise Ratio)最高等准则选择PMI。The target UE selects the PMI based on a criterion such as optimal capacity or highest Signal to Interference plus Noise Ratio (SINR, Signal to Interference plus Noise Ratio).

步骤103：所述基站接收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述MUST，则根据所述信道状态信息选择所述MUST的传输方式。Step 103: The base station receives the channel state information fed back by the target user terminal, determines whether to activate the MUST according to the channel state information, determines to activate the MUST, and then selects the MUST according to the channel state information the transmission method.

具体地，通过判断激活MUST是否有利于提高系统吞吐率来确定是否激活MUST。Specifically, it is determined whether to activate the MUST by judging whether activating the MUST is beneficial to improving the system throughput.

所述根据所述信道状态信息确定是否激活所述MUST，包括：The determining whether to activate the MUST according to the channel state information includes:

根据确定的信道状态信息确定系统吞吐率，判断激活所述多用户叠加传输的所述吞吐率是否高于未激活所述多用户叠加传输时的吞吐率，激活所述多用户叠加传输的所述吞吐率高于未激活所述多用户叠加传输时的吞吐率，则确定激活所述多用户叠加传输。Determine the system throughput rate according to the determined channel state information, determine whether the throughput rate of the activated multi-user superimposed transmission is higher than the throughput when the multi-user superimposed transmission is not activated, and activate the multi-user superimposed transmission. If the throughput rate is higher than the throughput rate when the multi-user superimposed transmission is not activated, it is determined to activate the multi-user superimposed transmission.

具体地，确定每个UE性能最优时的传输方式作为MUST的传输方式。Specifically, the transmission mode when the performance of each UE is optimal is determined as the MUST transmission mode.

所述根据所述信道状态信息选择所述MUST的传输方式，包括：The selection of the MUST transmission mode according to the channel state information includes:

根据所述信道状态信息，确定不同传输方式时的所述目标UE的性能，选择所述目标UE的性能最优时的传输方式。According to the channel state information, the performance of the target UE in different transmission modes is determined, and the transmission mode when the performance of the target UE is optimal is selected.

本发明实施例中，针对目标UE计算CQI做以下说明：In the embodiment of the present invention, the calculation of CQI for the target UE is described as follows:

目标UE基于eNB发送的MUST传输方式、参数配置信息及远端UE配对的假设，进行多个CQI与PMI的计算与选择。举例来说，计算CQI与PMI的方法，包括：The target UE calculates and selects multiple CQIs and PMIs based on the MUST transmission mode sent by the eNB, parameter configuration information, and the assumption of remote UE pairing. For example, the method for calculating CQI and PMI includes:

假设，接收的RRC信令配置参数为(case3，QPSK+QPSK，0.75，2)，可以确定：远端UE与目标UE采用case3的传输方式，即远端UE与目标UE采用不同的预编码；远端UE与目标UE的调制方式均为QPSK；远端UE与目标UE的功率比为(0.75:1-0.75)；反馈两个最好的CQI；Assuming that the received RRC signaling configuration parameters are (case3, QPSK+QPSK, 0.75, 2), it can be determined that: the remote UE and the target UE adopt the transmission mode of case3, that is, the remote UE and the target UE adopt different precoding; The modulation methods of the remote UE and the target UE are both QPSK; the power ratio of the remote UE and the target UE is (0.75:1-0.75); the two best CQIs are fed back;

根据传输方式确定远端UE与目标UE的预编码矩阵，根据远端UE与目标UE的功率比确定当前的功率比；Determine the precoding matrix of the remote UE and the target UE according to the transmission mode, and determine the current power ratio according to the power ratio of the remote UE and the target UE;

测量获得所述目标UE的信道估计值和噪声功率；Obtaining the estimated channel value and noise power of the target UE by measurement;

按下式(2)计算CQI：Calculate the CQI according to formula (2):

其中，CQI_n为第n个CQI，α为远端UE与目标UE的功率比，α＝0.75；P₁、P₂为远端UE和近端UE的预编码矩阵；s₁、s₂分别为远端UE与目标UE的符号功率；H₁为所述目标UE的信道估计值；N为噪声功率，可以通过测量有关资源块的功率确定。Among them, CQI _n is the nth CQI, α is the power ratio between the far-end UE and the target UE, α=0.75; P ₁ and P ₂ are the precoding matrices of the far-end UE and the near-end UE; s ₁ and s ₂ are respectively is the symbol power of the remote UE and the target UE; H ₁ is the channel estimation value of the target UE; N is the noise power, which can be determined by measuring the power of the relevant resource block.

基于式(2)计算可以算出多个CQI，并可以根据接收的所述CQI的数量、所述PMI的数量选择最好的几个CQI和PMI，并将选择的CQI的量化值和PMI反馈到所述基站。Multiple CQIs can be calculated based on formula (2), and the best CQIs and PMIs can be selected according to the number of received CQIs and PMIs, and the quantized value and PMI of the selected CQIs can be fed back to the base station.

图3为本发明实施例提供的一种信道状态信息反馈装置的结构示意图；如图3所示，所述装置，包括：第一发送模块、第二发送模块和确定模块；其中，Fig. 3 is a schematic structural diagram of a channel state information feedback device provided by an embodiment of the present invention; as shown in Fig. 3 , the device includes: a first sending module, a second sending module, and a determining module; wherein,

所述第一发送模块，用于向目标用户终端发送预激活信令，用以通知所述目标用户终端准备激活MUST；The first sending module is configured to send pre-activation signaling to the target user terminal to notify the target user terminal that it is ready to activate MUST;

所述第二发送模块，用于向所述目标用户终端发送调度指示信令，用以指示所述目标用户终端传输信道状态信息；所述预激活信息和所述调度指示信令被接收后，由所述目标用户终端根据所述预激活信令和所述调度指示信令确定信道状态信息并反馈给所述基站；The second sending module is configured to send scheduling indication signaling to the target user terminal to instruct the target user terminal to transmit channel state information; after the pre-activation information and the scheduling indication signaling are received, determining channel state information by the target user terminal according to the pre-activation signaling and the scheduling indication signaling and feeding it back to the base station;

所述确定模块，用于接收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述多用户叠加传输，则根据所述信道状态信息选择所述MUST的传输方式。The determination module is configured to receive the channel state information fed back by the target user terminal, determine whether to activate the MUST according to the channel state information, and determine to activate the multi-user superposition transmission, then according to the channel state information Select the transmission mode of the MUST.

具体地，所述信道状态信息，包括：CQI；Specifically, the channel state information includes: CQI;

所述预激活信令或所述调度指示信令，包括：所述MUST的传输方式、候选的功率比、调制方式组合、传输所述CQI的周期、所述CQI的数量、PMI的数量。The pre-activation signaling or the scheduling indication signaling includes: the transmission mode of the MUST, the candidate power ratio, the combination of modulation modes, the period for transmitting the CQI, the number of the CQI, and the number of PMIs.

这里，所述候选的功率比为所述远端用户终端与所述目标用户终端的功率比。Here, the candidate power ratio is a power ratio between the remote user terminal and the target user terminal.

具体地，所述确定模块，具体用于：根据反馈的所述信道状态信息确定吞吐率，判断激活所述多用户叠加传输的所述吞吐率是否高于未激活所述多用户叠加传输时的吞吐率，激活所述多用户叠加传输的所述吞吐率高于未激活所述多用户叠加传输时的吞吐率，则确定激活所述多用户叠加传输。Specifically, the determining module is specifically configured to: determine the throughput rate according to the fed-back channel state information, and judge whether the throughput rate of the activated multi-user superimposed transmission is higher than that of the deactivated multi-user superimposed transmission Throughput rate, if the throughput rate of the activated multi-user superimposed transmission is higher than the throughput when the multi-user superimposed transmission is not activated, then it is determined to activate the multi-user superimposed transmission.

具体地，所述确定模块，具体用于：根据所述信道状态信息，确定不同传输方式时的所述目标用户终端和所述远端用户终端的性能，选择所述目标用户终端和所述远端用户终端的性能最优时的传输方式。Specifically, the determining module is specifically configured to: determine the performance of the target user terminal and the remote user terminal in different transmission modes according to the channel state information, and select the target user terminal and the remote user terminal The transmission mode when the performance of the end-user terminal is optimal.

图4为本发明实施例提供的另一种信道状态信息反馈方法的流程示意图，如图4所示，所述方法包括：Fig. 4 is a schematic flowchart of another channel state information feedback method provided by an embodiment of the present invention. As shown in Fig. 4, the method includes:

步骤201、基站向目标用户终端发送预激活信令，用以通知所述目标用户终端准备激活MUST；Step 201, the base station sends a pre-activation signaling to the target user terminal to notify the target user terminal of preparing to activate the MUST;

步骤202、所述基站向所述目标用户终端发送调度指示信令，用以指示所述目标用户终端传输信道状态信息；Step 202, the base station sends a scheduling indication signaling to the target user terminal to instruct the target user terminal to transmit channel state information;

具体地，步骤201、202与所述步骤101、102相同，不再赘述；Specifically, steps 201 and 202 are the same as the steps 101 and 102, and will not be described again;

步骤203、所述目标用户终端接收预激活信息和所述调度指示信令后，根据所述预激活信令和所述调度指示信令确定信道状态信息并将所述信道状态信息反馈给所述基站；Step 203: After receiving the pre-activation information and the scheduling indication signaling, the target user terminal determines channel state information according to the pre-activation signaling and the scheduling indication signaling and feeds back the channel state information to the base station;

具体地，所述信道状态信息，包括：CQI；Specifically, the channel state information includes: CQI;

所述预激活信令或所述调度指示信令，包括：所述MUST的传输方式、候选的功率比、调制方式组合、传输所述CQI的周期、所述CQI的数量、PMI的数量；The pre-activation signaling or the scheduling indication signaling includes: the transmission mode of the MUST, the candidate power ratio, the combination of modulation modes, the period for transmitting the CQI, the number of the CQI, and the number of PMIs;

所述目标用户终端根据所述预激活信令和所述调度指示信令确定信道状态信息，包括：The target user terminal determines channel state information according to the pre-activation signaling and the scheduling indication signaling, including:

所述目标用户终端根据所述传输方式选择所述目标用户终端的预编码矩阵和远端用户终端的预编码矩阵，根据所述候选的功率比选择使用的功率比；The target user terminal selects the precoding matrix of the target user terminal and the precoding matrix of the remote user terminal according to the transmission mode, and selects a power ratio to be used according to the candidate power ratio;

所述目标用户终端测量获得信道估计值和噪声功率后，结合所述功率比、所述目标用户终端的预编码矩阵和远端用户终端的预编码矩阵，计算获得至少一个CQI。After the target user terminal measures and obtains the channel estimation value and noise power, calculate and obtain at least one CQI by combining the power ratio, the precoding matrix of the target user terminal and the precoding matrix of the remote user terminal.

具体地，所述调度指示信息，还包括：PUCCH或PUSCH的资源位置；Specifically, the scheduling indication information also includes: the resource location of PUCCH or PUSCH;

所述信道状态信息，还包括：PMI；The channel state information also includes: PMI;

所述目标用户终端将信道状态信息反馈给所述基站，包括：The target user terminal feeds back channel state information to the base station, including:

根据所述CQI的数量提取至少一个CQI作为所述信道状态信息；或者，根据所述CQI的数量提取至少一个CQI，并根据所述PMI的数量提取至少一个PMI，将提取的CQI和PMI作为所述信道状态信息；Extracting at least one CQI according to the number of CQIs as the channel state information; or extracting at least one CQI according to the number of CQIs, and extracting at least one PMI according to the number of PMIs, and using the extracted CQI and PMI as the channel state information the channel state information;

根据所述传输方式、所述远端用户终端与所述目标用户终端的调制方式，按照所述传输所述CQI的周期，在指定的所述PUCCH或PUSCH的资源位置上反馈所述信道状态信息。According to the transmission mode, the modulation mode of the remote user terminal and the target user terminal, and according to the cycle of transmitting the CQI, feed back the channel state information at the designated resource position of the PUCCH or PUSCH .

步骤204、所述基站接收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述MUST时，根据所述信道状态信息选择所述MUST的传输方式。Step 204, the base station receives the channel state information fed back by the target user terminal, determines whether to activate the MUST according to the channel state information, and selects the MUST according to the channel state information when determining to activate the MUST the transmission method.

具体地，步骤204与所述步骤103相同，不再赘述；Specifically, step 204 is the same as step 103, and will not be repeated;

相应地，本发明实施例还提供了一种信道状态信息反馈系统，图5为本发明实施例提供的一种信道状态信息反馈系统的结构示意图；如图5所示，所述系统，包括：基站和目标用户终端；其中，Correspondingly, an embodiment of the present invention also provides a channel state information feedback system, and FIG. 5 is a schematic structural diagram of a channel state information feedback system provided by an embodiment of the present invention; as shown in FIG. 5 , the system includes: base station and target user terminal; where,

所述基站，用于向目标用户终端发送预激活信令，用以通知所述目标用户终端准备激活MUST，所述目标用户终端为基站在相同时频域资源上调度两个用户终端中距离基站侧近的用户终端；向所述目标用户终端发送调度指示信令，用以指示所述目标用户终端传输信道状态信息；及，接收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述MUST时，根据所述信道状态信息选择所述MUST的传输方式；The base station is configured to send pre-activation signaling to the target user terminal to notify the target user terminal that it is ready to activate the MUST, and the target user terminal is a mid-distance base station for the base station to schedule two user terminals on the same time-frequency domain resources a nearby user terminal; sending scheduling indication signaling to the target user terminal to instruct the target user terminal to transmit channel state information; and receiving the channel state information fed back by the target user terminal, according to the The channel state information determines whether to activate the MUST, and when determining to activate the MUST, selects the transmission mode of the MUST according to the channel state information;

所述目标用户终端，用于在接收预激活信息和所述调度指示信令后，根据所述预激活信令和所述调度指示信令确定信道状态信息并反馈给所述基站。The target user terminal is configured to, after receiving the pre-activation information and the scheduling indication signaling, determine channel state information according to the pre-activation signaling and the scheduling indication signaling and feed it back to the base station.

具体地，所述信道状态信息，包括：CQI；Specifically, the channel state information includes: CQI;

所述预激活信令或所述调度指示信令，包括：所述MUST的传输方式、候选的功率比、调制方式组合、传输所述CQI的周期、所述CQI的数量、PMI的数量；The pre-activation signaling or the scheduling indication signaling includes: the transmission mode of the MUST, the candidate power ratio, the combination of modulation modes, the period for transmitting the CQI, the number of the CQI, and the number of PMIs;

所述目标用户终端，具体用于：根据所述传输方式选择所述目标用户终端的预编码矩阵和远端用户终端的预编码矩阵，根据所述候选的功率比选择使用的功率比；测量获得信道估计值和噪声功率后，结合所述功率比、所述目标用户终端的预编码矩阵和远端用户终端的预编码矩阵，计算获得至少一个CQI。The target user terminal is specifically configured to: select the precoding matrix of the target user terminal and the precoding matrix of the remote user terminal according to the transmission mode, and select a power ratio to be used according to the candidate power ratio; measure and obtain After the channel estimation value and the noise power, at least one CQI is calculated and obtained by combining the power ratio, the precoding matrix of the target user terminal and the precoding matrix of the remote user terminal.

具体地，所述调度指示信息，还包括：PUCCH或PUSCH的资源位置；Specifically, the scheduling indication information also includes: the resource location of PUCCH or PUSCH;

所述信道状态信息，还包括：PMI；The channel state information also includes: PMI;

所述目标用户终端，具体用于：根据所述CQI的数量提取至少一个CQI作为所述信道状态信息，或者，根据所述CQI的数量提取至少一个CQI，并根据所述PMI的数量提取至少一个PMI，将提取的CQI和PMI作为所述信道状态信息；The target user terminal is specifically configured to: extract at least one CQI according to the number of CQIs as the channel state information, or extract at least one CQI according to the number of CQIs, and extract at least one CQI according to the number of PMIs PMI, using the extracted CQI and PMI as the channel state information;

根据所述传输方式、所述远端用户终端与所述目标用户终端的调制方式，按照所述传输所述CQI的周期，在指定的所述PUCCH或PUSCH的资源位置上反馈所述信道状态信息。According to the transmission mode, the modulation mode of the remote user terminal and the target user terminal, and according to the cycle of transmitting the CQI, feed back the channel state information at the designated resource position of the PUCCH or PUSCH .

相应地，本发明实施例还提供了一种信道状态信息反馈方法，应用于所述信道状态信息反馈系统；所述方法包括：Correspondingly, an embodiment of the present invention also provides a channel state information feedback method, which is applied to the channel state information feedback system; the method includes:

基站向目标用户终端发送预激活信令，用以通知所述目标用户终端准备激活MUST；The base station sends a pre-activation signaling to the target user terminal to notify the target user terminal of preparing to activate the MUST;

所述基站向所述目标用户终端发送调度指示信令，用以指示所述目标用户终端传输信道状态信息；The base station sends scheduling indication signaling to the target user terminal to instruct the target user terminal to transmit channel state information;

所述目标用户终端接收预激活信息和所述调度指示信令后，根据所述预激活信令和所述调度指示信令确定信道状态信息并反馈给所述基站；After receiving the pre-activation information and the scheduling indication signaling, the target user terminal determines channel state information according to the pre-activation signaling and the scheduling indication signaling and feeds it back to the base station;

所述基站接收所述目标用户终端反馈的所述信道状态信息，根据所述信道状态信息确定是否激活所述MUST，确定激活所述MUST时，根据所述信道状态信息选择所述MUST的传输方式。The base station receives the channel state information fed back by the target user terminal, determines whether to activate the MUST according to the channel state information, and selects a transmission mode of the MUST according to the channel state information when determining to activate the MUST .

具体地，所述信道状态信息，包括：CQI；Specifically, the channel state information includes: CQI;

所述预激活信令或所述调度指示信令，包括：所述MUST的传输方式、候选的功率比、调制方式组合、传输所述CQI的周期、所述CQI的数量、PMI的数量；The pre-activation signaling or the scheduling indication signaling includes: the transmission mode of the MUST, the candidate power ratio, the combination of modulation modes, the period for transmitting the CQI, the number of the CQI, and the number of PMIs;

所述目标用户终端根据所述预激活信令和所述调度指示信令确定信道状态信息，包括：The target user terminal determines channel state information according to the pre-activation signaling and the scheduling indication signaling, including:

所述目标用户终端根据所述传输方式选择所述目标用户终端的预编码矩阵和远端用户终端的预编码矩阵，根据所述候选的功率比选择使用的功率比；The target user terminal selects the precoding matrix of the target user terminal and the precoding matrix of the remote user terminal according to the transmission mode, and selects a power ratio to be used according to the candidate power ratio;

所述目标用户终端测量获得信道估计值和噪声功率后，结合所述功率比、所述目标用户终端的预编码矩阵和远端用户终端的预编码矩阵，计算获得至少一个CQI。After the target user terminal measures and obtains the channel estimation value and noise power, calculate and obtain at least one CQI by combining the power ratio, the precoding matrix of the target user terminal and the precoding matrix of the remote user terminal.

具体地，所述调度指示信息，还包括：PUCCH或PUSCH的资源位置；Specifically, the scheduling indication information also includes: the resource location of PUCCH or PUSCH;

所述信道状态信息，还包括：PMI；The channel state information also includes: PMI;

所述目标用户终端将信道状态信息反馈给所述基站，包括：The target user terminal feeds back channel state information to the base station, including:

根据所述CQI的数量提取至少一个CQI作为所述信道状态信息，或者，根据所述CQI的数量提取至少一个CQI，并根据所述PMI的数量提取至少一个PMI，将提取的CQI和PMI作为所述信道状态信息；Extracting at least one CQI according to the number of CQIs as the channel state information, or extracting at least one CQI according to the number of CQIs, and extracting at least one PMI according to the number of PMIs, and using the extracted CQI and PMI as the channel state information the channel state information;

根据所述传输方式、所述远端用户终端与所述目标用户终端的调制方式，按照所述传输所述CQI的周期，在指定的所述PUCCH或PUSCH的资源位置上反馈所述信道状态信息。According to the transmission mode, the modulation mode of the remote user terminal and the target user terminal, and according to the cycle of transmitting the CQI, feed back the channel state information at the designated resource position of the PUCCH or PUSCH .

图6为本发明实施例提供的再一种信道状态信息反馈方法的流程示意图；如图6所示，所述方法，包括：FIG. 6 is a schematic flowchart of another channel state information feedback method provided by an embodiment of the present invention; as shown in FIG. 6, the method includes:

为进行MUST传输预激活，所述eNB向目标UE发送预激活信令；其中，所述预激活信令，可以包括所述eNB指示所述目标UE执行MUST多种CQI计算的各项配置信息，包括：CQI的周期、CQI的数量、PMI的数量、CQI的传输方式、候选的功率比和调制方式组合。In order to perform MUST transmission pre-activation, the eNB sends pre-activation signaling to the target UE; wherein the pre-activation signaling may include various configuration information for the eNB to instruct the target UE to perform MUST multiple CQI calculations, Including: CQI period, CQI quantity, PMI quantity, CQI transmission mode, candidate power ratio and modulation mode combination.

随后，所述eNB向目标UE发送DCI；其中，所述调度指示信令为所述eNB向所述目标UE发送的关于传输多种CQI的上行资源指示，即PUCCH或者PUSCH的资源位置。Subsequently, the eNB sends DCI to the target UE; wherein, the scheduling indication signaling is an uplink resource indication about transmission of various CQIs sent by the eNB to the target UE, that is, a resource position of a PUCCH or a PUSCH.

所述调度指示信令也可以包含部分或全部所述预激活信令中所包含的配置信息。The scheduling indication signaling may also include part or all of the configuration information included in the pre-activation signaling.

所述目标UE收到所述预激活信令与所述调度指示信令以后，将按照所述预激活信令中的配置信息执行CQI的计算过程，并基于所述预激活信令中提供的配置信息以及所述调度指示信令中的上行资源指示执行反馈多种CQI选择与反馈机制。After the target UE receives the pre-activation signaling and the scheduling indication signaling, it will perform a CQI calculation process according to the configuration information in the pre-activation signaling, and based on the information provided in the pre-activation signaling The configuration information and the uplink resource indication in the scheduling indication signaling execute and feed back various CQI selection and feedback mechanisms.

基于反馈多种CQI选择与反馈结果，所述eNB确定是否激活MUST过程并确定MUST传输方式。Based on feeding back multiple CQI selections and feedback results, the eNB determines whether to activate the MUST process and determines the MUST transmission mode.

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，本发明可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of a hardware embodiment, a software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take 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.) having computer-usable program code embodied therein.

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。The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

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。These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

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。These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

以上所述，仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。The above description is only a preferred embodiment of the present invention, and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.