WO2014019530A1

WO2014019530A1 - Method for feeding back channel state information and user equipment

Info

Publication number: WO2014019530A1
Application number: PCT/CN2013/080596
Authority: WO
Inventors: 李儒岳; 徐俊; 郭森宝; 任敏; 张峻峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-08-03
Filing date: 2013-08-01
Publication date: 2014-02-06
Also published as: CN103580812A; CN103580812B

Abstract

A method for feeding back channel state information and a user equipment. According to the number of ports of a CSI-RS and a pmi-RI-Report parameter configured at a base station side, a user equipment determines the feedback manner of channel state information to be one of the following: PMI, RI and CQI feedback; RI and CQI feedback; and CQI feedback. The above technical solution supports the switching of three feedback manner types, and can improve the flexibility and performance of the system and reduce the feedback overhead.

Description

一种信道状态信息的反馈方法及用户设备 Feedback method and user equipment for channel state information

技术领域 Technical field

本发明涉及信道状态信息的反馈技术，尤其涉及一种信道状态信息的反馈方法及用户设备。 The present invention relates to a feedback technique for channel state information, and in particular, to a method and a user equipment for feedback of channel state information.

背景技术 Background technique

在无线通信技术中，基站侧（例如演进的节点 B即 eNB )使用多根天线发送数据时，可以釆取空间复用的方式来提高数据传输速率，即在发送端使用相同的时频资源在不同的天线位置发射不同的数据，接收端（例如用户设备 UE )也使用多根天线接收数据。在单用户的情况下将所有天线的资源都分配给同一用户，此用户在一个传输间隔内独自占有基站侧分配的物理资源，这种传输方式称为单用户多入多出（SU-MIMO , Single User Multiple-Input Multiple-Out-put); 在多用户的情况下将不同天线的空间资源分配给不同用户，一个用户和至少一个其它用户在一个传输间隔内共享基站侧分配的物理资源, 共享方式可以是空分多址方式或者空分复用方式，这种传输方式称为多用户多入多出（MU-MIMO , Multiple User Multiple-Input Multiple-Out-put)，其中基站侧分配的物理资源是指时频资源。传输***如果要同时支持 SU-MIMO和 MU-MIMO, eNB则需要向 UE提供这两种模式下的数据。 UE在 SU-MIMO 模式或 MU-MIMO模式时，均需获知 eNB对于该 UE传输 MIMO数据所用的秩（Rank ) 。在 SU-MIMO模式下，所有天线的资源都分配给同一用户，传输 MIMO数据所用的层数就等于 eNB在传输 MIMO数据所用的秩；在 MU-MIMO模式下，对应一个用户传输所用的层数少于 eNB传输 MIMO数据的总层数，如果要进行 SU-MIMO模式与 MU-MIMO的切换， eNB需要在不同传输模式下通知 UE不同的控制数据。 In a wireless communication technology, when a base station side (for example, an evolved Node B or an eNB) transmits data using multiple antennas, spatial multiplexing may be used to increase the data transmission rate, that is, the same time-frequency resource is used at the transmitting end. Different antenna locations transmit different data, and the receiving end (eg, user equipment UE) also uses multiple antennas to receive data. In the case of a single user, resources of all antennas are allocated to the same user. The user occupies the physical resources allocated by the base station side in a single transmission interval. This transmission mode is called single-user multiple input and multiple output (SU-MIMO, Single User Multiple-Input Multiple-Out-put); allocates spatial resources of different antennas to different users in the case of multiple users, and one user and at least one other user share physical resources allocated by the base station side in one transmission interval, sharing The mode may be a space division multiple access mode or a space division multiplexing mode. The transmission mode is called Multiple User Multiple-Input Multiple-Out-put (MU-MIMO), where the base station side allocates the physics. Resources are time-frequency resources. If the transmission system is to support both SU-MIMO and MU-MIMO, the eNB needs to provide the UE with data in these two modes. When the UE is in the SU-MIMO mode or the MU-MIMO mode, it is necessary to know the rank (Rank) used by the eNB to transmit MIMO data to the UE. In SU-MIMO mode, all antenna resources are allocated to the same user, and the number of layers used to transmit MIMO data is equal to the rank used by the eNB to transmit MIMO data. In MU-MIMO mode, the number of layers used for one user transmission Less than the total number of layers of MIMO data transmitted by the eNB, if SU-MIMO mode and MU-MIMO handover are to be performed, the eNB needs to notify the UE of different control data in different transmission modes.

在长期演进（LTE, Long Term Evolution ) ***中，上行需要传输的控制信令有正确 /错误应答消息（ ACK/NACK , Acknowledgement/Negative Acknowledgement ) , 以及反映下行物理信道状态的信息（CSI, Channel State Information )的三种形式：信道质量指示 ( CQI, Channels Quality Information )、预编码矩阵指示（PMI, Pre-coding Matrix Indicator ) 、秩指示（RI, Rank Indicator ) 。 In the Long Term Evolution (LTE) system, the control signaling required for uplink transmission has an ACK/NACK, Acknowledgement/Negative Acknowledgement, and information reflecting the state of the downlink physical channel (CSI, Channel State). Three forms of Information: Channel Quality Information (CQI, Channels Quality Information), Pre-coding Matrix Indicator (PMI), Rank Indicator (RI, Rank Indicator).

LTE ***中， ACK/NACK应答消息在物理上行控制信道（PUCCH, Physical Uplink Control )上以格式 1/la/lb ( PUCCH format 1/1 al/b )传输，如果用户设备（UE, User Equipment )需要发送上行数据时，则在物理上行共享信道（PUSCH, Physical Uplink Shared Channel )上传输。 CQI/PMI, RI的反馈可以是周期性的反馈，也可以是非周期性的反馈，具体的反馈如下表 1 所示： In the LTE system, the ACK/NACK response message is transmitted on the physical uplink control channel (PUCCH, Physical Uplink Control) in the format 1/la/lb (PUCCH format 1/1 al/b), if the user equipment (UE, User Equipment) When uplink data needs to be transmitted, it is transmitted on a Physical Uplink Shared Channel (PUSCH). CQI/PMI, RI feedback can be periodic feedback or non-periodic feedback. The specific feedback is shown in Table 1 below:

表 1 周期性反馈和非周期性反馈对应的上行物理信道 Table 1 Uplink physical channel corresponding to periodic feedback and aperiodic feedback

其中，对于周期性反馈的 CQI/PMI、 RI而言，如果 UE不需要发送上行数据，则周期反馈的 CQI/PMI、 RI在 PUCCH上以格式 2/2a/2b ( PUCCH format2/2a/2b )传输，如果 UE需要发送上行数据时，则 CQI/PMLRI在 PUSCH 上传输；对于非周期性反馈的 CQI/PMI、 RI而言，只在 PUSCH上传输。 For CQI/PMI and RI of periodic feedback, if the UE does not need to send uplink data, the CQI/PMI and RI of the periodic feedback are in the format 2/2a/2b (PUCCH format2/2a/2b) on the PUCCH. Transmission, if the UE needs to send uplink data, then CQI/PMLRI is transmitted on the PUSCH; for non-periodic feedback CQI/PMI, RI, only on the PUSCH.

LTE的版本 8 ( R8, Release 8 )标准中定义了如下三种下行物理控制信道：物理下行控制格式指示信道（PCFICH, Physical Control Format Indicator The following three downlink physical control channels are defined in the LTE Release 8 (R8, Release 8) standard: Physical Downlink Control Format Indicator Channel (PCFICH, Physical Control Format Indicator)

Channel ) 、物理混合自动重传请求指示信道（ PHICH , Physical HybridChannel ) , physical hybrid automatic repeat request indication channel ( PHICH , Physical Hybrid

Automatic Retransmission Request Indicator Channel ) 和物理下行控制信道Automatic Retransmission Request Indicator Channel ) and physical downlink control channel

( PDCCH, Physical Downlink Control Channel ) 。其中 PDCCH用于承载下行控制信息（DCI, Downlink Control Information ) , 包括：上、下行调度信息，以及上行功率控制信息。 DCI的格式（DCI format )分为以下几种： DCI format 0、 DCI format 1、 DCI format 1A、 DCI format 1B、 DCI format 1C、 DCI format 1D、 DCI format 2、 DCI format 2A、 DCI format 3和 DCI format 3 A等；其中支持 MU-MIMO的传输模式 5利用了 DCI format ID的下行控制信息，而 DCI format ID中的下行功率域 ( Downlink power offset field ) ^_power._offset用于指示在 MU-MIMO模式中对于一个用户的功率减半（即 -101ogl0(2) )的信息，由于 MU-MIMO传输模式 5只支持两个用户的 MU-MIMO传输，通过此下行功率域， MU-MIMO传输模式 5可以支持 SU-MIMO模式和 MU-MIMO模式的动态切换，但是无论在 SU-MIMO模式或 MU-MIMO模式，此 DCI format 对一个 UE只支持一个流的传输，虽然 LTE Release 8在传输模式 4中支持最多两个流的单用户传输，但因为传输模式之间的切换只能是半静态的，所以在 LTE版本 8中不能做到单用户多流传输和多用户传输的动态切换。 (PDCCH, Physical Downlink Control Channel). The PDCCH is used to carry Downlink Control Information (DCI), and includes: uplink and downlink scheduling information, and uplink power control information. The DCI format (DCI format) is divided into the following types: DCI format 0, DCI format 1, DCI format 1A, DCI format 1B, DCI format 1C, DCI format 1D, DCI format 2, DCI format 2A, DCI format 3, and DCI Format 3 A, etc. The transmission mode 5 supporting MU-MIMO utilizes the downlink control information of the DCI format ID, and the downlink power domain (Downlink power offset field) ^ _power . _offset in the DCI format ID is used to indicate the MU-MIMO. Information in the mode for halving the power of one user (ie -101ogl0(2)), Since MU-MIMO transmission mode 5 only supports MU-MIMO transmission of two users, MU-MIMO transmission mode 5 can support dynamic switching of SU-MIMO mode and MU-MIMO mode through this downlink power domain, but in SU- MIMO mode or MU-MIMO mode, this DCI format supports only one stream transmission for one UE, although LTE Release 8 supports single-user transmission of up to two streams in transmission mode 4, but the switching between transmission modes can only It is semi-static, so in LTE Release 8, dynamic switching of single-user multi-stream transmission and multi-user transmission cannot be achieved.

在 LTE的版本 9 ( R9 )中，为了增强下行多天线传输，引入了双流波束赋形（Beamforming )的传输模式，定义为传输模式 8, 而下行控制信息增加了 DCI format 2B以支持这种传输模式，在 DCI format 2B中有一个扰码序列身份（SCID, scrambling identity ) 的标识比特以支持两个不同的扰码序列， eNB可以将这两个扰码序列分配给不同用户，在同一资源复用多个用户。另夕卜，当只有一个传输块使能的时候，非使能（Disabled ) 的传输块对应的新数据指示（NDI ) 比特亦用来指示单层传输时的天线端口。 In Release 9 (R9) of LTE, in order to enhance downlink multi-antenna transmission, a dual stream beamforming transmission mode is introduced, defined as transmission mode 8, and downlink control information is added to DCI format 2B to support such transmission. The mode, in the DCI format 2B, has an identification bit of a scrambling identity (SCID) to support two different scrambling code sequences, and the eNB can allocate the two scrambling code sequences to different users, in the same resource. Use multiple users. In addition, when only one transport block is enabled, the new data indication (NDI) bit corresponding to the non-enabled (Transabled) transport block is also used to indicate the antenna port for single layer transmission.

另外，在 LTE的版本 10 ( R10 )中，为了进一步增强下行多天线的传输, 增加了新的闭环空间复用的传输模式，定义为传输模式 9, 这种传输模式既可以支持单用户 MIMO, 又可以支持多用户 MIMO, 并且可以支持两者的动态切换，另外这种传输模式还支持 8天线的传输。这种新的传输模式已经确定了用解调导频（DMRS, Demodulation Reference Signal )来作解调用的导频， UE 需获取导频的位置，才可以在导频上做信道和干扰的估计。不同传输的总层数有不同的导频图案，例如在 LTE的版本号 10中初步定有三种不同的图案（DMRS Pattern ) , 传输的总层数或秩为 1或 2时，用第一个图案 ( DMRS pattern 1 ) , 传输的总层数或秩为 3或 4时用第二个图案（DMRS pattern 2 ) , 传输的总层数或秩为 5至 8中任一值时用第三个图案（DMRS pattern 3 )。在 SU-MIMO模式中，所有的传输层的数据都发送给同一个 UE, 所以 UE 只要获取秩就可以知道导频图案也可以知道导频的位置。在 SU-MIMO模式中， UE需获知秩和开始对该 UE进行传输的层数， UE也需获知传输用的导频图案才可以获取干扰的导频位置。除此之外，不同的 DMRS 端口使用不同的扩频码， UE还需获知传输用的扩频码才可以获取导频上的信息。在 RIO版本中， UE通过高层信令半静态（ semi-statically ) 的被设置为基于以下的一种传输模式（transmission mode ) , 按照用户设备专有 ( UE-Specific ) 的搜索空间的 PDCCH的指示来接收 PDSCH数据传输：传输模式 1：单天线端口；端口 0 ( Single-antenna port; port 0 ) 传输模式 2: 发射分集（ Transmit diversity ) In addition, in LTE Release 10 (R10), in order to further enhance downlink multi-antenna transmission, a new closed-loop spatial multiplexing transmission mode is added, which is defined as transmission mode 9, which can support single-user MIMO. It can also support multi-user MIMO, and can support dynamic switching between the two. In addition, this transmission mode also supports 8-antenna transmission. This new transmission mode has determined the pilot for demodulation using Demodulation Reference Signal (DMRS). The UE needs to obtain the position of the pilot before it can make channel and interference estimation on the pilot. . The total number of layers of different transmissions has different pilot patterns. For example, in LTE version number 10, three different patterns (DMRS Pattern) are initially determined. When the total number of layers or rank is 1 or 2, the first one is used. The pattern ( DMRS pattern 1 ), the total number of layers or ranks transmitted is 3 or 4 with the second pattern (DMRS pattern 2 ), and the total number of layers or ranks transmitted is any one of 5 to 8 with a third Pattern (DMRS pattern 3). In the SU-MIMO mode, all the data of the transport layer are transmitted to the same UE, so the UE can know that the pilot pattern can also know the position of the pilot as long as the rank is acquired. In the SU-MIMO mode, the UE needs to know the rank and the number of layers to start transmitting to the UE, and the UE also needs to know the pilot pattern for transmission to obtain the interference pilot position. In addition, different DMRS ports use different spreading codes, and the UE needs to know the spreading code for transmission to obtain the information on the pilot. In the RIO version, the UE is semi-statically set by higher layer signaling to be based on one of the following transmission modes, in accordance with the indication of the PDCCH of the user equipment-specific (UE-Specific) search space. To receive PDSCH data transmission: Transmission mode 1: Single antenna port; Port 0 (Single-antenna port; port 0) Transmission mode 2: Transmit diversity

传输模式 3：开环空间复用（ Open-loop spatial multiplexing ) Transmission mode 3: Open-loop spatial multiplexing

传输模式 4：闭环空间复用（ Closed-loop spatial multiplexing ) Transmission mode 4: Closed-loop spatial multiplexing

传输模式 5: 多用户多输入多输出（ Multi-user MIMO ) Transmission Mode 5: Multi-user Multiple Input Multiple Output (Multi-user MIMO)

传输模式 6: 闭环 Rank=l预编码（ Closed-loop Rank=l precoding ) 传输模式 7: 单天线端口；端口 5 ( Single-antenna port; port 5 ) 传输模式 8: 双流传输，即双流波束赋形 Transmission mode 6: Closed-loop Rank=l precoding Transmission mode 7: Single antenna port; Port 5 (Single-antenna port; port 5) Transmission mode 8: Dual stream transmission, ie dual stream beamforming

传输模式 9: 最多 8层的空间复用。 Transmission mode 9: Up to 8 layers of spatial multiplexing.

在 R10版本中，对于物理上行控制信道 PUCCH的反馈，传输模式 9支持模式 1-1和模式 2-1反馈方式。对于传输模式 9的模式 1-1反馈方式，进一步包括子模式 1 和子模式 2 , 通过高层配置信令 PUCCH—formatl -1—CSI— reporting— mode 来区分。对于物理上行共享信道 PUSCH的反馈，传输模式 9需要支持三种反馈方式，分别是模式 1-2、模式 2-2和模式 3-1。 In the R10 version, for the feedback of the physical uplink control channel PUCCH, the transmission mode 9 supports the mode 1-1 and the mode 2-1 feedback mode. For the mode 1-1 feedback mode of the transmission mode 9, further including the sub mode 1 and the sub mode 2, the high layer configuration signal PUCCH_formatl -1 - CSI - reporting mode is distinguished. For the feedback of the physical uplink shared channel PUSCH, the transmission mode 9 needs to support three feedback modes, namely mode 1-2, mode 2-2 and mode 3-1.

在 R10版本中，新增加了传输模式 9和信道状态指示参考符号 (CSI-RS， Channel-State Information - Reference Symbol), 传输模式 9是基于 CSI-RS 进行信道测量，从而计算得到 CQI。其他传输模式是基于 CRS进行信道测量，从而计算 CQI。在 R10版本中，相应的也增加了一些 CSI-RS参数来表征其属性。对比 R8中的 CRS ,有些参数是类似的，有些参数是新增的。如 CSI-RS 端口数目在 R8中也有类似的 CRS端口数，而 CSI-RS子帧配置周期参数则是新增的。下面的参数是小区专有且由高层信令配置，用于 CSI-RS的定义，包括： CSI-RS端口数、 CSI-RS配置、 CSI-RS子帧配置参数 I_{CSH s}、子帧配置周期 T_CSI__RS、子帧偏量和用于 CSI反馈的 UE假设的参考 PDSCH发射功率等。在 RIO中，对于传输模式 9, 因为引入了 "双码本" 或者 "双 ΡΜΓ 的新概念，所以需要反馈两个 PMI; 对于 8天线，第一 PMI指示宽带的信道状态信息，第二 PMI指示子带的信道状态信息，只有获得两个 PMI才能得到完整的预编码矩阵信息，其中子带包括宽带的情况；对于 2天线和 4天线，第一 PMI指示的是单位阵，第二 PMI等价于原 R8协议的 PMI。 In the R10 version, a transmission mode 9 and a channel state information reference symbol (CSI-RS, Channel-State Information - Reference Symbol) are newly added, and the transmission mode 9 is a channel measurement based on the CSI-RS, thereby calculating a CQI. Other transmission modes are based on CRS for channel measurement to calculate CQI. In the R10 version, some CSI-RS parameters have also been added to characterize their properties. Compared to the CRS in R8, some parameters are similar, and some parameters are new. For example, the number of CSI-RS ports also has a similar number of CRS ports in R8, and the CSI-RS subframe configuration period parameters are new. The following parameters are cell-specific and configured by higher layer signaling for CSI-RS definition, including: CSI-RS port number, CSI-RS configuration, CSI-RS subframe configuration parameter I _{CSH s} , subframe configuration period T _CSI _ _RS , subframe offset and reference PDSCH transmit power assumed by the UE for CSI feedback, and the like. In RIO, for transmission mode 9, since a new concept of "double codebook" or "double" is introduced, two PMIs need to be fed back; for 8 antennas, the first PMI indicates broadband channel state information, and the second PMI indication The channel state information of the subband, only the two PMIs can obtain the complete precoding matrix information, wherein the subband includes the wideband case; for the 2 antenna and the 4 antenna, the first PMI indicates the unit matrix, and the second PMI is equivalent. The PMI of the original R8 protocol.

对于 R10 协议的传输模式 9, 其反馈方式支持有 PMI/RI反馈和没有 PMI/RI反馈两种方式，在 TDD方式下一般釆用没有 PMI/RI, 利用信道互易性获得下行的信道状态信息，但是信道互易性无法考虑下行的干扰情况，将导致基站无法准确知道下行的信道状态信息特别是秩指示 (RI)信息，因而无法实现秩的自适应传输，降低了***的灵活性和性能。 For the transmission mode 9 of the R10 protocol, the feedback mode supports PMI/RI feedback and no PMI/RI feedback. In the TDD mode, no PMI/RI is used, and channel reciprocity is used to obtain downlink channel state information. However, the channel reciprocity cannot consider the downlink interference situation, which will result in the base station not being able to accurately know the downlink channel state information, especially the rank indication (RI) information, and thus cannot implement the adaptive transmission of the rank, thereby reducing the flexibility and performance of the system. .

发明内容 Summary of the invention

本发明实施例要解决的技术问题是提供一种信道状态信息的反馈方法及用户设备，可以支持三种反馈方式类型的切换，提高***的灵活性、性能和减少反馈开销。 The technical problem to be solved by the embodiments of the present invention is to provide a feedback method for channel state information and a user equipment, which can support three types of feedback mode switching, improve system flexibility, performance, and reduce feedback overhead.

为解决上述技术问题，釆用如下技术方案： In order to solve the above technical problems, the following technical solutions are used:

一种信道状态信息的反馈方法，包括：用户设备根据基站侧配置的信道状态信息-参考符号 (CSI-RS)的端口数目和预编码矩阵指示-秩指示 -报告 (pmi-RI-Report)参数，确定信道状态信息的反馈方式为以下方式中的其中一种： A method for feeding back channel state information includes: a port number of a channel state information-reference symbol (CSI-RS) configured by a user equipment according to a base station side, and a precoding matrix indication-rank indication-report (pmi-RI-Report) parameter The method for determining the channel state information feedback is one of the following ways:

反馈预编码矩阵指示 (PMI)、秩指示 (RI)和信道质量指示 (CQI); Feedback Precoding Matrix Indicator (PMI), Rank Indicator (RI), and Channel Quality Indicator (CQI);

反馈 RI和 CQI; Feedback RI and CQI;

反馈 CQL Feedback CQL

可选地，所述用户设备确定信道状态信息的反馈方式的步骤包括：根据所述 CSI-RS的端口数目确定是否仅反馈 CQI, 所述 CSI-RS的端口数目为 1时，则确定反馈方式为仅反馈 CQI; Optionally, the step of determining, by the user equipment, the feedback mode of the channel state information includes: determining whether to feed back only the CQI according to the number of ports of the CSI-RS, and determining the feedback mode when the number of ports of the CSI-RS is 1. For feedback only CQI;

所述 CSI-RS的端口数目大于 1时，则根据所述 pmi-RI-Report参数选择以下两种反馈方式中的其中一种：反馈 PMI、 RI和 CQI; 反馈 RI和 CQI。可选地，所述用户设备根据所述 CSI-RS的端口数目和所述 pmi-RI-Report 参数确定信道状态信息的反馈方式的步骤包括： When the number of ports of the CSI-RS is greater than 1, one of the following two feedback modes is selected according to the pmi-RI-Report parameter: feedback PMI, RI, and CQI; feedback RI and CQI. Optionally, the step of determining, by the user equipment, the feedback manner of the channel state information according to the number of ports of the CSI-RS and the pmi-RI-Report parameter includes:

若所述 CSI-RS的端口数目为 1 , 则确定反馈方式为：反馈 CQI; If the number of ports of the CSI-RS is 1, the feedback mode is determined as: feedback CQI;

若所述 CSI-RS的端口数目大于 1且存在所述 pmi-RI-Report参数，则确定反馈方式为：反馈 PMI、 RI和 CQI; If the number of ports of the CSI-RS is greater than 1 and the pmi-RI-Report parameter exists, determining the feedback mode is: feedback PMI, RI, and CQI;

若所述 CSI-RS的端口数目大于 1且不存在所述 pmi-RI-Report参数，则确定反馈方式为：反馈 RI和 CQI。 If the number of ports of the CSI-RS is greater than 1 and the pmi-RI-Report parameter does not exist, the feedback mode is determined as: feedback RI and CQI.

可选地，针对当前的传输模式 N, 其中 N为大于等于 9的正整数，所述用户设备确定信道状态信息的反馈方式的步骤包括： Optionally, for the current transmission mode N, where N is a positive integer greater than or equal to 9, the step of the user equipment determining the feedback manner of the channel state information includes:

所述用户设备根据基站侧配置的所述 CSI-RS 的端口数目确定反馈模式 x-y的第二参数 y, 所述 CSI-RS的端口数目为 1时，则 y为 0; 所述 CSI-RS 的端口数目大于 1时，则 y大于 0; Determining, by the user equipment, a second parameter y of the feedback mode xy according to the number of ports of the CSI-RS configured by the base station side, where the number of ports of the CSI-RS is 1, then y is 0; the CSI-RS is When the number of ports is greater than 1, then y is greater than 0;

所述用户设备根据确定的所述第二参数 y和基站侧配置的反馈模式的第一参数 X, 确定反馈模式 x-y; 其中 X表示 CQI反馈类型， X为正整数； y表示 PMI反馈类型， y为 0或者正整数； Determining, by the user equipment, the feedback mode xy according to the determined second parameter y and the first parameter X of the feedback mode configured by the base station side; where X represents a CQI feedback type, X is a positive integer; y represents a PMI feedback type, y Is 0 or a positive integer;

所述用户设备根据基站侧配置的所述 pmi-RI-Report参数选择所述反馈模式 x-y中的以下两种反馈方式中的其中一种：反馈 PMI、 RI和 CQI; 反馈 RI和 CQI。 The user equipment selects one of the following two feedback modes in the feedback mode x-y according to the pmi-RI-Report parameter configured on the base station side: feedback PMI, RI, and CQI; feedback RI and CQI.

可选地，所述用户设备根据所述第一参数 X和所述第二参数 y确定反馈模式 x-y的步骤包括： Optionally, the step of determining, by the user equipment, the feedback mode x-y according to the first parameter X and the second parameter y includes:

对于周期反馈，所述第二参数 y为 0, 所述第一参数 X为 1或 2时，则确定的反馈模式分别为模式 1-0、模式 2-0; 所述第二参数 y大于 0, 所述第一参数 X为 1或 2时，则确定的反馈模式分别为模式 1-1、模式 2-1。 For periodic feedback, the second parameter y is 0, and when the first parameter X is 1 or 2, the determined feedback modes are mode 1-0 and mode 2-0, respectively; and the second parameter y is greater than 0. When the first parameter X is 1 or 2, the determined feedback modes are mode 1-1 and mode 2-1, respectively.

可选地，针对当前的传输模式 N, N为大于等于 9的正整数，所述用户设备确定信道状态信息的反馈方式的步骤包括： Optionally, for the current transmission mode, N, N is a positive integer greater than or equal to 9. The step of determining, by the user equipment, the feedback manner of the channel state information includes:

所述用户设备根据基站侧配置的第一参数 X和第二参数 y, 确定反馈模式 x-y; 其中，所述 CSI-RS的端口数目为 1时，则 y为 0; 所述 CSI-RS的端口数目大于 1时，则 y大于 0; 所述的用户设备根据基站侧配置的所述 pmi-RI-Report参数选择所述反馈模式 Mode x-y中的以下两种反馈方式中的其中一种：反馈 PMI、 RI和 CQI; 反馈 RI和 CQI。 The user equipment determines the feedback mode xy according to the first parameter X and the second parameter y configured on the base station side, where y is 0 when the number of ports of the CSI-RS is 1, and the port of the CSI-RS When the number is greater than 1, then y is greater than 0; The user equipment selects one of the following two feedback modes in the feedback mode Mode xy according to the pmi-RI-Report parameter configured by the base station side: feedback PMI, RI, and CQI; feedback RI and CQI.

对于非周期反馈，所述第二参数 y为 0, 所述第一参数 X为 2或 3时，则确定的反馈模式分别为模式 2-0、模式 3-0; 所述第二参数 y大于 0, 所述第一参数 X为 1、 2或 3时，则确定的反馈模式分别为模式 1-2、模式 2-2或模式 3-1。 For the aperiodic feedback, the second parameter y is 0, and when the first parameter X is 2 or 3, the determined feedback modes are respectively mode 2-0, mode 3-0; the second parameter y is greater than 0. When the first parameter X is 1, 2, or 3, the determined feedback modes are mode 1-2, mode 2-2, or mode 3-1, respectively.

一种用户设备，所述用户设备包括反馈方式确定模块和反馈模块，其中：所述反馈方式确定模块设置成：根据基站侧配置的 CSI-RS 的端口数目和 pmi-RI-Report参数，确定信道状态信息的反馈方式为以下其中一种：反馈 PML RI和 CQI; 反馈 RI和 CQI; 反馈 CQI; A user equipment, where the user equipment includes a feedback mode determining module and a feedback module, where: the feedback mode determining module is configured to: determine a channel according to the number of ports of the CSI-RS configured by the base station side and the pmi-RI-Report parameter The feedback of status information is one of the following: feedback PML RI and CQI; feedback RI and CQI; feedback CQI;

所述反馈模块设置成：根据确定的所述反馈方式反馈相应的信道状态信息。 The feedback module is configured to: feed back corresponding channel state information according to the determined feedback manner.

可选地，所述反馈方式确定模块设置成按照如下方式确定信道状态信息的反馈方式： Optionally, the feedback mode determining module is configured to determine a feedback manner of the channel state information according to the following manner:

根据所述 CSI-RS的端口数目确定是否仅反馈 CQI, 所述 CSI-RS的端口数目为 1时，则确定反馈方式为仅反馈 CQI; Determining whether the CQI is only fed back according to the number of ports of the CSI-RS, and when the number of ports of the CSI-RS is 1, determining that the feedback mode is only feedback CQI;

所述 CSI-RS的端口数目大于 1时，则根据所述 pmi-RI-Report参数选择以下两种反馈方式中的其中一种：反馈 PMI、 RI和 CQI; 反馈 RI和 CQI。 When the number of ports of the CSI-RS is greater than 1, one of the following two feedback modes is selected according to the pmi-RI-Report parameter: feedback PMI, RI, and CQI; feedback RI and CQI.

可选地，所述反馈方式确定模块设置成按照如下方式根据所述 CSI-RS 的端口数目和所述 pmi-RI-Report参数确定信道状态信息的反馈方式： Optionally, the feedback mode determining module is configured to determine a feedback manner of the channel state information according to the number of ports of the CSI-RS and the pmi-RI-Report parameter according to the following manner:

若所述 CSI-RS的端口数目大于 1且存在所述 pmi-RI-Report参数，则确定反馈方式为：反馈 PMI、 RI和 CQI; 若所述 CSI-RS的端口数目大于 1且不存在所述 pmi-RI-Report参数，则确定反馈方式为：反馈 RI和 CQI。 If the number of ports of the CSI-RS is greater than 1 and the pmi-RI-Report parameter exists, determining a feedback manner is: feedback PMI, RI, and CQI; If the number of ports of the CSI-RS is greater than 1 and the pmi-RI-Report parameter does not exist, the feedback mode is determined as: feedback RI and CQI.

可选地，所述反馈方式确定模块设置成针对当前的传输模式 N, 其中 N 为大于等于 9的正整数，按照以下方式确定信道状态信息的反馈方式： Optionally, the feedback mode determining module is configured to determine a feedback mode of the channel state information according to a current transmission mode N, where N is a positive integer greater than or equal to 9.

根据基站侧配置的所述 CSI-RS的端口数目确定反馈模式 x-y的第二参数 y, 所述 CSI-RS的端口数目为 1时，则 y为 0; 所述 CSI-RS的端口数目大于 1时，则 y大于 0; Determining a second parameter y of the feedback mode xy according to the number of ports of the CSI-RS configured on the base station side, where y is 0 when the number of ports of the CSI-RS is 1, and the number of ports of the CSI-RS is greater than 1. When y is greater than 0;

根据确定的所述的第二参数 y和基站侧配置的反馈模式的第一参数 X, 确定反馈模式 x-y; 其中 X表示 CQI反馈类型， X为正整数； y表示 PMI反馈类型， y为 0或者正整数； Determining a feedback mode xy according to the determined second parameter y and a first parameter X of a feedback mode configured on the base station side; wherein X represents a CQI feedback type, X is a positive integer; y represents a PMI feedback type, and y is 0 or Positive integer

根据基站侧配置的所述 pmi-RI-Report参数选择所述反馈模式 x-y中的以下两种反馈方式中的其中一种：反馈 PMI、 RI和 CQI; 反馈 RI和 CQI。 Selecting one of the following two feedback modes in the feedback mode x-y according to the pmi-RI-Report parameter configured on the base station side: feedback PMI, RI, and CQI; feedback RI and CQI.

根据基站侧配置的第一参数 X和第二参数 y, 确定反馈模式 x-y; 其中，所述 CSI-RS的端口数目为 1时，则 y为 0; 所述 CSI-RS的端口数目大于 1 时，则 y大于 0; Determining the feedback mode xy according to the first parameter X and the second parameter y configured on the base station side; wherein, when the number of ports of the CSI-RS is 1, y is 0; when the number of ports of the CSI-RS is greater than 1 , then y is greater than 0;

上述技术方案通过高层信令配置的 CSI-RS端口数目及指示是否反馈预编码矩阵指示（PMI )和秩指示（RI ) 的高层信令信息唯一确定当前的反馈方式： CQI反馈， RI/CQI反馈， RI/PMI/CQI反馈三种形式，支持三种反馈方式类型的切换，解决了反馈方式确定问题，保证单层传输和 TDD 时候可以选择正确信道状态信息进行反馈；并且提高***的灵活性、性能和减少反馈开销；另外，上述技术方案没有增加任何***复杂度和信令开销，并且兼容之前的协议版本，保持了良好的兼容性。附图概述 The foregoing technical solution uniquely determines the current feedback mode by using the number of CSI-RS ports configured by the high-level signaling and the high-level signaling information indicating whether the precoding matrix indication (PMI) and the rank indication (RI) are fed back: CQI feedback, RI/CQI feedback RI/PMI/CQI feedback three forms, support three types of feedback mode switching, solve the problem of feedback mode determination, ensure correct channel state information feedback for single layer transmission and TDD; and improve system flexibility, Performance and reduced feedback overhead; In addition, the above technical solution does not add any system complexity and signaling overhead, and is compatible with the previous protocol version, maintaining good compatibility. BRIEF abstract

此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中： The drawings are intended to provide a further understanding of the invention, and are intended to be illustrative of the invention. In the drawing:

图 1是本发明实施例的信道状态信息的反馈方法的流程示意图。 FIG. 1 is a schematic flowchart diagram of a method for feeding back channel state information according to an embodiment of the present invention.

本发明的较佳实施方式 Preferred embodiment of the invention

为解决相关技术中存在的上述问题，本实施方式提供了一种信道状态信息的反馈方法，釆用如下技术方案： In order to solve the above problems in the related art, the present embodiment provides a feedback method for channel state information, and uses the following technical solutions:

用户设备根据高层信令配置的 CSI-RS 的端口数目和高层参数预编码矩阵指示-秩指示 -报告（pmi-RI-Report ) , 从以下三种方式中选择一种信道状态信息的反馈方式： PMI、 RI和 CQI; RI和 CQI; CQL The user equipment selects one channel state information feedback manner from the following three methods according to the number of ports of the CSI-RS configured by the high layer signaling and the high level parameter precoding matrix indication-rank indication-report (pmi-RI-Report): PMI, RI and CQI; RI and CQI; CQL

其中，在现有标准定义的传输模式 8和传输模式 9中，可以根据高层参数 pmi-RI-Report配置用户设备有 PMI/RI报告或者没有 PMI/RI报告。 Among them, in the transmission mode 8 and the transmission mode 9 defined by the existing standard, the user equipment may be configured with a PMI/RI report or no PMI/RI report according to the high-level parameter pmi-RI-Report.

可选地，所述用户设备根据所述 CSI-RS 的端口数目和高层参数 pmi-RI-Report选择反馈方式时，若所述 CSI-RS的端口数目为 1 , 则所述用户设备只反馈信道质量指示 (CQI); 若所述 CSI-RS的端口数目大于 1且存在高层参数 mi-RI-Report,则所述用户设备反馈 PMLRI和 CQI;若所述 CSI-RS 的端口数目大于 1 且不存在高层参数 pmi-RI-Report, 则所述用户设备反馈 RI和 CQI。 Optionally, when the user equipment selects a feedback mode according to the port number of the CSI-RS and the high-level parameter pmi-RI-Report, if the number of ports of the CSI-RS is 1, the user equipment only feeds back the channel. Quality indication (CQI); if the number of ports of the CSI-RS is greater than 1 and there is a high-level parameter mi-RI-Report, the user equipment feeds back PMLRI and CQI; if the number of ports of the CSI-RS is greater than 1 and not There is a high-level parameter pmi-RI-Report, and the user equipment feeds back RI and CQI.

可选地，用户设备按照以下方式确定当前的传输模式 N (其中 N为大于等于 9的正整数）需要的反馈模式 (Mode) x-y: Optionally, the user equipment determines a feedback mode (Mode) x-y required for the current transmission mode N (where N is a positive integer greater than or equal to 9) in the following manner:

用户设备根据高层信令 CSI-RS的端口数目确定反馈方式的第二参数 y, 即根据 CSI-RS端口数目确定是否仅有 CQI反馈，若端口数目等于 1则 y=0, 即仅反馈 CQI; 否则，若端口数目大于 1则 y>0, 即反馈 RI/CQI或者反馈 RI/PMI/CQI; The user equipment determines the second parameter y of the feedback mode according to the number of ports of the high-level signaling CSI-RS, that is, whether the CQI feedback is only determined according to the number of CSI-RS ports, and if the number of ports is equal to 1, then y=0, that is, only the CQI is fed back; Otherwise, if the number of ports is greater than 1, then y>0, that is, feedback RI/CQI or feedback RI/PMI/CQI;

用户设备根据高层参数 mi-RI-Report从反馈模式 Mode x-y定义的以下两种反馈方式中选择一种反馈方式： PMI、 RI和 CQI; 或者 RI和 CQI。其中，反馈模式 x-y的第一参数 x表示 CQI反馈类型， X为正整数；第二参数 y表示 PMI反馈类型， y为 0或者正整数； The user equipment selects one of the following two feedback modes defined by the feedback mode Mode xy according to the high-level parameter mi-RI-Report: PMI, RI, and CQI; or RI and CQI. The first parameter x of the feedback mode xy represents a CQI feedback type, X is a positive integer; the second parameter y represents a PMI feedback type, and y is 0 or a positive integer;

反馈模式 Mode x-y定义的两种反馈方式，是指：如果选择的反馈方式是反馈 PMI、RI和 CQI,则按照现有的反馈模式 Mode x-y定义的规则报告 PMI、 RI和 CQI; 如果选择的反馈方式是反馈 RI和 CQI, 则按照现有的反馈模式 Mode x-y定义的规则上报 RI和 CQI, PMI则不再上报。 The two feedback modes defined by the feedback mode Mode xy are: If the selected feedback mode is feedback PMI, RI and CQI, the PMI, RI and CQI are reported according to the rules defined by the existing feedback mode Mode xy; if the feedback is selected The method is to report the RI and the CQI, and the RI and the CQI are reported according to the rules defined by the existing feedback mode Mode xy, and the PMI is not reported.

可选地，当高层信令配置的传输模式为传输模式 N, 周期反馈时，若用户设备根据 CSI-RI的端口数目确定的第二参数 y为 0, 基站侧配置的第一参数 X为 1或 2时，则确定的反馈模式分别为模式 1-0、模式 2-0; 若用户设备根据 CSI-RI的端口数目确定的第二参数 y大于 0, 且基站侧配置的第一参数 X为 1或 2, 则确定的反馈模式分别为模式 1-1、模式 2-1。 Optionally, when the transmission mode of the high-level signaling configuration is the transmission mode N, and the periodic feedback, if the second parameter y determined by the user equipment according to the number of ports of the CSI-RI is 0, the first parameter X configured by the base station side is 1 Or 2, the determined feedback mode is mode 1-0, mode 2-0; if the second parameter y determined by the user equipment according to the number of ports of the CSI-RI is greater than 0, and the first parameter X configured by the base station side is 1 or 2, the determined feedback modes are mode 1-1 and mode 2-1, respectively.

可选地，当高层信令配置的传输模式为传输模式 N, 非周期反馈时，若用户设备根据 CSI-RI的端口数目确定的第二参数 y为 0 , 基站侧配置的第一参数 X为 2或 3时，则确定的反馈模式分别为模式 2-0、模式 3-0; 若用户设备根据 CSI-RI的端口数目确定的第二参数 y大于 0, 基站侧配置的第一参数 X为 1、 2或 3 , 则确定的反馈模式分别为模式 1-2、模式 2-2或模式 3-1 ; Optionally, when the transmission mode of the high-level signaling configuration is the transmission mode N, and the aperiodic feedback, if the second parameter y determined by the user equipment according to the number of ports of the CSI-RI is 0, the first parameter X configured by the base station side is 2 or 3, the determined feedback mode is mode 2-0, mode 3-0; if the second parameter y determined by the user equipment according to the number of ports of the CSI-RI is greater than 0, the first parameter X configured on the base station side is 1, 2 or 3, then the determined feedback modes are mode 1-2, mode 2-2 or mode 3-1;

或者，若基站侧配置的第二参数 y为 0, 第一参数 X为 2或 3时，则确定的反馈模式分别为模式 2-0、模式 3-0;若基站侧配置的第二参数 y大于 0, 第一参数 X为 1、 2或 3 , 则确定的反馈模式分别为模式 1-2、模式 2-2或模式 3-1 ; Alternatively, if the second parameter y configured on the base station side is 0, and the first parameter X is 2 or 3, the determined feedback modes are mode 2-0 and mode 3-0, respectively; if the second parameter y configured on the base station side If the first parameter X is greater than 0, the first parameter X is 1, 2 or 3, and the determined feedback modes are mode 1-2, mode 2-2 or mode 3-1, respectively;

可选地，用户设备根据所确定的反馈方式反馈信道状态信息。 Optionally, the user equipment feeds back channel state information according to the determined feedback manner.

为了便于阐述本发明，以下将结合附图及具体实施例对本发明技术方案的实施作进一步详细描述。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。 In order to facilitate the description of the present invention, the implementation of the technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

实施例一 Embodiment 1

本实施例中假定基站为某个 UE配置了传输模式 N, 其中， N是大于等于 9的正整数。该 UE的 PDSCH的传输策略是支持最多 8层的闭环空间复用，同时支持版本 11的多点协作传输 (COMP)传输。另外，基站为该 UE配置了 8个 CSI-RS端口， CSI-RS端口号分别为： 15、 16、 17、 18、 19、 20、 21和 22。同时，假定基站为该 UE配置了 pmi-RI-Report。 In this embodiment, it is assumed that the base station configures a transmission mode N for a certain UE, where N is greater than or equal to A positive integer of 9. The UE's PDSCH transmission strategy supports up to 8 layers of closed-loop spatial multiplexing, while supporting version 11 of Multipoint Cooperative Transport (COMP) transmission. In addition, the base station configures eight CSI-RS ports for the UE, and the CSI-RS port numbers are: 15, 16, 17, 18, 19, 20, 21, and 22. At the same time, it is assumed that the base station configures the pmi-RI-Report for the UE.

如图 1所示，用户设备反馈信道状态信息的过程主要包括如下步骤：步骤 S201 , 用户设备根据高层信令确定 CSI-RS的端口数目； As shown in FIG. 1 , the process for the user equipment to feed back the channel state information mainly includes the following steps: Step S201: The user equipment determines, according to the high layer signaling, the number of ports of the CSI-RS.

步骤 S203 , 用户设备根据高层信令确定当前的传输模式； Step S203: The user equipment determines, according to the high layer signaling, a current transmission mode.

步骤 S205 , 用户设备根据高层参数 pmi-RI-Report、 CSI-RS的端口数目和当前的传输模式确定反馈方式，该步骤具体包括： Step S205: The user equipment determines the feedback mode according to the high-level parameter pmi-RI-Report, the number of ports of the CSI-RS, and the current transmission mode. The step includes:

用户设备根据 CSI-RS 的端口数目确定当前的传输模式需要的反馈模式 The user equipment determines the feedback mode required by the current transmission mode according to the number of ports of the CSI-RS.

Mode x-y的第二参数 y, 由于 CSI-RS端口数目等于 8 , 故 y>0; 并根据高层参数 mi-RI-Report从预定义的两种反馈方式中选择一种反馈方式： PMI、 RI 和 CQI, RI和 CQI。 The second parameter y of Mode xy, because the number of CSI-RS ports is equal to 8, so y>0; and according to the high-level parameter mi-RI-Report, one feedback mode is selected from two predefined feedback modes: PMI, RI and CQI, RI and CQI.

可选地，对于传输模式 N 的周期反馈，即一般通过物理上行控制信道 PUCCH反馈， UE可以根据高层信令直接确定 X , 并根据 CSI-RS端口数目确定 y>0,根据获得的 X和 y从模式 1-1、模式 2-1反馈模式中选择一个模式，该反馈方式是模式 x-l。其中， X等于 1或者 2; Optionally, for periodic feedback of the transmission mode N, that is, generally through the physical uplink control channel PUCCH feedback, the UE may directly determine X according to the high layer signaling, and determine y>0 according to the number of CSI-RS ports, according to the obtained X and y. A mode is selected from the mode 1-1 and the mode 2-1 feedback mode, and the feedback mode is the mode x1. Where X is equal to 1 or 2;

对于传输模式 N的非周期反馈，即一般通过物理上行共享信道 PUSCH 反馈，即 UE可以根据高层信令直接确定 x=l或者 x=2或者 3 ,并根据 CSI-RS 端口数目确定 y>0 ,最终从模式 1 -2、模式 2-2、模式 3-1中选择一个模式 χΟ-yO。其中， χθ等于 1或者 2或者 3; 如果 x0=l,2, 则 y0=2; 如果 x0=3 , 则 y0=l。 For the aperiodic feedback of the transmission mode N, that is, the PUSCH feedback is generally performed through the physical uplink shared channel, that is, the UE can directly determine x=l or x=2 or 3 according to the high layer signaling, and determine y>0 according to the number of CSI-RS ports. Finally, a mode χΟ-yO is selected from mode 1-2, mode 2-2, mode 3-1. Where χθ is equal to 1 or 2 or 3; if x0=l,2, then y0=2; if x0=3, then y0=l.

此处，用户设备的反馈方式釆用模式 Mode x-y表示；其中， x=l表示宽带 CQI/PMI; x=2表示 UE选择子带 CQI; x=3表示高层配置子带 CQI; y=0 表示没有 PMI; y=l表示单个 PMI; y=2表示多个 PMI, 此规则适用于周期和非周期上报。步骤 S207 , 用户设备根据确定的反馈方式，将信道状态信息报告发送给 eNB。实施例二 Here, the feedback mode of the user equipment is represented by the mode Mode xy; wherein x=l represents a wideband CQI/PMI; x=2 represents a UE selecting a subband CQI; x=3 represents a high layer configuration subband CQI; y=0 represents There is no PMI; y=l represents a single PMI; y=2 represents multiple PMIs, and this rule applies to periodic and aperiodic reporting. Step S207: The user equipment sends a channel state information report to the eNB according to the determined feedback manner. Embodiment 2

本实施例中假定基站为某个 UE配置了传输模式 N, 其中， N是大于等于 9的正整数，则该 UE的 PDSCH的传输策略是支持最多 8层的闭环空间复用，同时支持版本 11。另外，基站为该 UE只配置了 1个 CSI-RS端口， CSI-RS端口号是 15。 In this embodiment, it is assumed that the base station configures a transmission mode N for a certain UE, where N is a positive integer greater than or equal to 9, and the PDSCH transmission strategy of the UE supports up to 8 layers of closed-loop spatial multiplexing, and supports version 11 at the same time. . In addition, the base station configures only one CSI-RS port for the UE, and the CSI-RS port number is 15.

可选地，用户设备确定信道状态信息反馈方式的过程包括如下主要步骤： Optionally, the process of determining, by the user equipment, the channel state information feedback manner includes the following main steps:

A1.用户根据高层信令确定当前的传输模式； A1. The user determines the current transmission mode according to the high layer signaling;

B1.用户设备根据高层信令 CSI-RS的端口数目确定当前的传输模式需要的反馈模式 Mode x-y的第二参数 y;由于 CSI-RS端口数目等于 1 ,因此 y=0。 B1. The user equipment determines the feedback mode required for the current transmission mode according to the number of ports of the high-level signaling CSI-RS. The second parameter y of the mode x-y; since the number of CSI-RS ports is equal to 1, y=0.

此处，用户设备的反馈方式釆用模式 x-y表示；其中， x=l 表示宽带 Here, the feedback mode of the user equipment is represented by the mode x-y; wherein x=l represents broadband

CQI/PMI; x=2表示 UE选择子带 CQI; x=3表示高层配置子带 CQI; y=0表示没有 PMI; y=l表示单个 PMI; y=2表示多个 PMI, 此规则适用于周期和非周期上报。 CQI/PMI; x=2 indicates that the UE selects the subband CQI; x=3 indicates the high layer configuration subband CQI; y=0 indicates no PMI; y=l indicates a single PMI; y=2 indicates multiple PMIs, this rule applies to Periodic and aperiodic reporting.

对于传输模式 N的周期反馈，即通过物理上行控制信道 PUCCH的反馈， UE可以根据高层信令直接确定 X, 根据 CSI-RS端口数目确定 y=0, 根据获得的 X和 y从模式 1-0、模式 2-0反馈模式中选择一个模式，这个反馈模式是模式 x-0。其中， χθ等于 1或者 2。 For the periodic feedback of the transmission mode N, that is, the feedback of the physical uplink control channel PUCCH, the UE may directly determine X according to the high layer signaling, determine y=0 according to the number of CSI-RS ports, and according to the obtained X and y slave modes 1-0. Select one of the mode 2-0 feedback modes. This feedback mode is mode x-0. Where χθ is equal to 1 or 2.

对于传输模式 N的非周期反馈，即通过物理上行共享信道 PUSCH, 即 UE可以根据高层信令直接确定 x=2或者 3 ,根据 CSI-RS端口数目确定 y=0 , 最终实现从模式 2-0、模式 3-0中选择一个模式。这个反馈模式是模式 x-0。其中， χθ等于 2或者 3。 For the aperiodic feedback of the transmission mode N, that is, the physical uplink shared channel PUSCH, that is, the UE can directly determine x=2 or 3 according to the high layer signaling, and determine y=0 according to the number of CSI-RS ports, and finally implement the slave mode 2-0. , select a mode in mode 3-0. This feedback mode is mode x-0. Where χθ is equal to 2 or 3.

C1.用户设备根据高层参数 pmi-RI-Report从预定义的两种反馈模式中选择一种反馈模式： PMI、 RI和 CQI, RI和 CQI。其中，反馈模式 x-y定义了所述的两种预定义的反馈方式。 C1. The user equipment selects one feedback mode from the predefined two feedback modes according to the high-level parameter pmi-RI-Report: PMI, RI and CQI, RI and CQI. The feedback mode x-y defines the two predefined feedback modes described.

D1.用户设备根据确定的反馈方式反馈信道状态信息。 D1. The user equipment feeds back channel state information according to the determined feedback manner.

可选地，根据反馈方式（周期反馈或非周期反馈）和确定的反馈模式有以下几种情形： Optionally, depending on the feedback mode (periodic feedback or aperiodic feedback) and the determined feedback mode, there are the following situations:

周期反馈时，若确定的反馈模式为模式 1-0, UE将反馈宽带 CQI信息；若确定的反馈模式为模式 2-0, UE将反馈宽带 CQI和选择的子带 CQI。 During periodic feedback, if the determined feedback mode is mode 1-0, the UE will feed back the broadband CQI information; If the determined feedback mode is mode 2-0, the UE will feed back the wideband CQI and the selected subband CQI.

非周期反馈时，若确定的反馈模式为模式 1-0, 反馈宽带的 CQI; 若确定的反馈模式为模式 2-0, 反馈宽带的 CQI和 M个子带的 CQI; 若确定的反馈模式为模式 3-0, 为每个码字计算并反馈一个宽带 CQI值（即宽带 CQI索引， 4bit ) , 为每个子带计算并反馈一个子带 CQI值。 For aperiodic feedback, if the determined feedback mode is mode 1-0, feedback the wideband CQI; if the determined feedback mode is mode 2-0, feedback the wideband CQI and M subband CQI; if the determined feedback mode is mode 3-0, Calculate and feed back a wideband CQI value (ie, wideband CQI index, 4 bits) for each codeword, and calculate and feed back a subband CQI value for each subband.

需要说明的是，上文中所述的指示信息，可以是直接指示是否反馈 PMI 和 RI的信息，也可以是指示反馈方式类型（分为反馈 PMI/RI的反馈方式类型和不反馈 PMI/RI的反馈方式类型）的信息，本发明对此不做限定。 It should be noted that the indication information described above may be information indicating whether to directly feed back PMI and RI, or may indicate the type of feedback mode (the type of feedback mode that is divided into feedback PMI/RI and the non-feedback PMI/RI). The information of the feedback mode type is not limited by the present invention.

此外，对应于以上方法，本发明实施例中还提供了一种用户设备，该用户设备主要包括反馈方式确定模块和反馈模块，其中： In addition, corresponding to the above method, the embodiment of the present invention further provides a user equipment, where the user equipment mainly includes a feedback mode determining module and a feedback module, where:

反馈方式确定模块设置成：根据基站侧（高层信令）配置的 CSI-RS 的端口数目和高层参数 mi-RI-Report 从以下三种方式中选择一种方式进行信道状态信息的反馈： PML RI和 CQI; RI和 CQI; CQI; The feedback mode determining module is configured to: according to the number of ports of the CSI-RS configured by the base station side (high-level signaling) and the high-level parameter mi-RI-Report, the channel state information is fed back by selecting one of the following three methods: PML RI And CQI; RI and CQI; CQI;

反馈模块设置成：根据所确定的反馈方式反馈相应的信道状态信息。其中，在传输模式 8和传输模式 9中，可以根据高层参数 pmi-RI-Report 配置用户设备有 PMI/RI报告或者没有 PMI/RI报告。 The feedback module is configured to: feed back corresponding channel state information according to the determined feedback manner. In the transmission mode 8 and the transmission mode 9, the user equipment may be configured with a PMI/RI report or no PMI/RI report according to the high-level parameter pmi-RI-Report.

可选地，所述反馈方式确定模块根据所述 CSI-RS 的端口数目和高层参数 pmi-RI-Report选择反馈方式时，若所述 CSI-RS的端口数目为 1 , 则只反馈信道质量指示 (CQI), 不反馈预编码矩阵指示（PMI )和秩指示（RI ) ；若所述 CSI-RS的端口数目大于 1且存在高层参数 pmi-RI-Report,则反馈 PMI、 RI和 CQI;若所述 CSI-RS的端口数目大于 1且不存在高层参数 pmi-RI-Report, 则反馈 RI和 CQI。 Optionally, when the feedback mode determining module selects a feedback mode according to the port number of the CSI-RS and the high-level parameter pmi-RI-Report, if the number of ports of the CSI-RS is 1, only the channel quality indicator is fed back. (CQI), does not feed back precoding matrix indication (PMI) and rank indication (RI); if the number of ports of the CSI-RS is greater than 1 and there is a high-level parameter pmi-RI-Report, feedback PMI, RI and CQI; If the number of ports of the CSI-RS is greater than 1 and there is no high-level parameter pmi-RI-Report, the RI and CQI are fed back.

可选地，反馈方式确定模块根据 CSI-RS 的端口数目确定反馈方式的第二参数 y, 即根据 CSI-RS端口数目确定是否仅有 CQI反馈，若端口数目等于 1则只有 CQI反馈，否则有 RI/CQI反馈或者 RI/PMI/CQI反馈。反馈方式确定模块再根据高层参数 pmi-RI-Report从预定义的两种反馈方式中选择一种反馈方式： PMI、 RI和 CQI, RI和 CQI。可选地，所述高层信令配置的传输模式为传输模式 9, 周期反馈时，若确定的反馈模式第二参数 y为 0, 所述反馈模式的第一参数 X为 1或 2时，则确定的反馈模式分别为模式 1-0、模式 2-0; 若确定的反馈模式第二参数 y 大于 0,所述反馈模式的第一参数 X为 1或 2,则确定的反馈模式分别为模式 1-1、模式 2-1。 Optionally, the feedback mode determining module determines the second parameter y of the feedback mode according to the number of ports of the CSI-RS, that is, whether the CQI feedback is only determined according to the number of CSI-RS ports, and only CQI feedback if the number of ports is equal to 1, otherwise RI/CQI feedback or RI/PMI/CQI feedback. The feedback mode determining module selects a feedback mode from the predefined two feedback modes according to the high-level parameter pmi-RI-Report: PMI, RI and CQI, RI and CQI. Optionally, the transmission mode of the high-level signaling configuration is a transmission mode 9, and when the periodic feedback is performed, if the determined feedback mode second parameter y is 0, and the first parameter X of the feedback mode is 1 or 2, The determined feedback modes are mode 1-0 and mode 2-0, respectively; if the determined feedback mode second parameter y is greater than 0, and the first parameter X of the feedback mode is 1 or 2, the determined feedback mode is respectively mode 1-1, mode 2-1.

可选地，所述高层信令配置的传输模式为传输模式 9, 非周期反馈时，若确定的反馈模式第二参数 y为 0,所述反馈模式的第一参数 X为 2或 3时，则确定的反馈模式分别为模式 2-0、模式 3-0; 若确定的反馈模式第二参数 y 大于 0, 所述反馈模式的第一参数 X分 1、 2或 3 , 则确定的反馈模式分别为模式 1-2、模式 2-2或模式 3-1。 Optionally, the transmission mode of the high-level signaling configuration is the transmission mode 9, and when the non-period feedback is performed, if the determined feedback mode second parameter y is 0, and the first parameter X of the feedback mode is 2 or 3, Then the determined feedback mode is mode 2-0, mode 3-0; if the determined feedback mode second parameter y is greater than 0, the first parameter of the feedback mode is X, 1, 2 or 3, then the determined feedback mode They are mode 1-2, mode 2-2 or mode 3-1.

可理解的，本发明仅对用户设备区别于现有技术的功能模块进行了描述，对其他功能模块，本发明不做具体限定。 It is to be understood that the present invention is only described in terms of a user module that is different from the prior art. For other functional modules, the present invention is not specifically limited.

综上所述，本发明通过 CSI-RS 的端口数目及指示是否反馈预编码矩阵指示（ PMI )和秩指示（ RI )的指示信息确定是否需要反馈 PMI/RI,使得 R11 的传输模式可以支持三种反馈方式类型的切换，从而能够提高***的灵活性、性能和减少反馈开销。 In summary, the present invention determines whether the PMI/RI needs to be fed back through the number of ports of the CSI-RS and the indication information indicating whether to feed back the Precoding Matrix Indicator (PMI) and the Rank Indicator (RI), so that the transmission mode of the R11 can support three. Switching of feedback mode types can increase system flexibility, performance and reduce feedback overhead.

以上仅为本发明的优选实施案例而已，并不用于限制本发明，本发明还可有其他多种实施例，在不背离本发明精神及其实质的情况下，熟悉本领域的技术人员可根据本发明做出各种相应的改变和变形，但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。 The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. The present invention may be embodied in various other embodiments without departing from the spirit and scope of the invention. Various changes and modifications may be made to the invention, and such changes and modifications are intended to be included within the scope of the appended claims.

显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。工业实用性 Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. Industrial applicability

上述技术方案通过高层信令配置的 CSI-RS端口数目及指示是否反馈预编码矩阵指示（PMI )和秩指示（RI ) 的高层信令信息唯一确定当前的反馈方式： CQI反馈， RI/CQI反馈， RI/PMI/CQI反馈三种形式，支持三种反馈方式类型的切换，解决了反馈方式确定问题，保证单层传输和 TDD 时候可以选择正确信道状态信息进行反馈；并且提高***的灵活性、性能和减少反馈开销；另外，上述技术方案没有增加任何***复杂度和信令开销，并且兼容之前的协议版本，保持了良好的兼容性。因此本发明具有很强的工业实用性。 The foregoing technical solution uniquely determines the current feedback mode by using the number of CSI-RS ports configured by the high-level signaling and the high-level signaling information indicating whether the precoding matrix indication (PMI) and the rank indication (RI) are fed back: CQI feedback, RI/CQI feedback RI/PMI/CQI feedback three forms, support three types of feedback mode switching, solve the problem of feedback mode determination, ensure correct channel state information feedback for single layer transmission and TDD; and improve system flexibility, Performance and reduced feedback overhead; In addition, the above technical solution does not add any system complexity and signaling overhead, and is compatible with the previous protocol version, maintaining good compatibility. Therefore, the present invention has strong industrial applicability.

Claims

权利要求书 claims

1、一种信道状态信息的反馈方法，包括： 1. A feedback method for channel state information, including:

用户设备根据基站侧配置的信道状态信息-参考符号 (CSI-RS)的端口数目和预编码矩阵指示-秩指示 -报告 (pmi-RI-Report)参数，确定信道状态信息的反馈方式为以下方式中的其中一种： The user equipment determines the feedback method of the channel status information in the following manner according to the port number of the channel status information-reference symbol (CSI-RS) and the precoding matrix indication-rank indication-report (pmi-RI-Report) parameter configured on the base station side. One of:

反馈预编码矩阵指示 (PMI)、秩指示 (RI)和信道质量指示 (CQI); Feedback Precoding Matrix Indicator (PMI), Rank Indicator (RI) and Channel Quality Indicator (CQI);

反馈 RI和 CQI; Feedback RI and CQI;

反馈 CQL Feedback CQL

2、如权利要求 1所述的反馈方法，其中，所述用户设备确定信道状态信息的反馈方式的步骤包括： 2. The feedback method according to claim 1, wherein the step of the user equipment determining the feedback mode of the channel state information includes:

根据所述 CSI-RS的端口数目确定是否仅反馈 CQI, 所述 CSI-RS的端口数目为 1时，则确定反馈方式为仅反馈 CQI; Determine whether to feedback only CQI according to the number of ports of the CSI-RS. When the number of ports of the CSI-RS is 1, it is determined that the feedback mode is to feedback only CQI;

所述 CSI-RS的端口数目大于 1时，则根据所述 pmi-RI-Report参数选择以下两种反馈方式中的其中一种：反馈 PMI、 RI和 CQI; 反馈 RI和 CQI。 When the number of ports of the CSI-RS is greater than 1, one of the following two feedback methods is selected according to the pmi-RI-Report parameter: feedback PMI, RI and CQI; feedback RI and CQI.

3、如权利要求 1所述的反馈方法，其中，所述用户设备根据所述 CSI-RS 的端口数目和所述 pmi-RI-Report参数确定信道状态信息的反馈方式的步骤包括： 3. The feedback method according to claim 1, wherein the step of the user equipment determining the feedback mode of the channel state information according to the port number of the CSI-RS and the pmi-RI-Report parameter includes:

若所述 CSI-RS的端口数目为 1 , 则确定反馈方式为：反馈 CQI; If the number of ports of the CSI-RS is 1, then the feedback method is determined to be: Feedback CQI;

若所述 CSI-RS的端口数目大于 1且存在所述 pmi-RI-Report参数，则确定反馈方式为：反馈 PMI、 RI和 CQI; If the number of ports of the CSI-RS is greater than 1 and the pmi-RI-Report parameter exists, the feedback method is determined to be: feedback PMI, RI and CQI;

若所述 CSI-RS的端口数目大于 1且不存在所述 pmi-RI-Report参数，则确定反馈方式为：反馈 RI和 CQI。 If the number of ports of the CSI-RS is greater than 1 and the pmi-RI-Report parameter does not exist, then the feedback method is determined to be: feedback RI and CQI.

4、如权利要求 3所述的反馈方法，其中，针对当前的传输模式 N, 其中 N为大于等于 9的正整数，所述用户设备确定信道状态信息的反馈方式的步骤包括： 4. The feedback method according to claim 3, wherein, for the current transmission mode N, where N is a positive integer greater than or equal to 9, the step of the user equipment determining the feedback mode of the channel state information includes:

所述用户设备根据基站侧配置的所述 CSI-RS 的端口数目确定反馈模式 x-y的第二参数 y, 所述 CSI-RS的端口数目为 1时，则 y为 0; 所述 CSI-RS 的端口数目大于 1时，则 y大于 0; The user equipment determines the second parameter y of the feedback mode xy according to the number of ports of the CSI-RS configured on the base station side. When the number of ports of the CSI-RS is 1, then y is 0; the CSI-RS When the number of ports is greater than 1, then y is greater than 0;

所述用户设备根据确定的所述第二参数 y和基站侧配置的反馈模式的第一参数 X, 确定反馈模式 x-y; 其中 X表示 CQI反馈类型， X为正整数； y表示 PMI反馈类型， y为 0或者正整数； The user equipment determines the feedback mode x-y according to the determined second parameter y and the first parameter X of the feedback mode configured on the base station side; where X represents the CQI feedback type, and X is a positive integer; y represents the PMI feedback type, y is 0 or a positive integer;

所述用户设备根据基站侧配置的所述 pmi-RI-Report参数选择所述反馈模式 x-y中的以下两种反馈方式中的其中一种：反馈 PMI、 RI和 CQI; 反馈 RI和 CQI。 The user equipment selects one of the following two feedback modes in the feedback mode x-y according to the pmi-RI-Report parameter configured on the base station side: feedback PMI, RI and CQI; feedback RI and CQI.

5、如权利要求 4所述的反馈方法，其中，所述用户设备根据所述第一参数 X和所述第二参数 y确定反馈模式 x-y的步骤包括： 5. The feedback method according to claim 4, wherein the step of the user equipment determining the feedback mode x-y according to the first parameter X and the second parameter y includes:

对于周期反馈，所述第二参数 y为 0, 所述第一参数 X为 1或 2时，则确定的反馈模式分别为模式 1-0、模式 2-0; 所述第二参数 y大于 0, 所述第一参数 X为 1或 2时，则确定的反馈模式分别为模式 1-1、模式 2-1。 For periodic feedback, when the second parameter y is 0 and the first parameter X is 1 or 2, the determined feedback modes are mode 1-0 and mode 2-0 respectively; the second parameter y is greater than 0 , when the first parameter X is 1 or 2, the determined feedback modes are mode 1-1 and mode 2-1 respectively.

6、如权利要求 3所述的反馈方法，其中，针对当前的传输模式 N, N为大于等于 9的正整数，所述用户设备确定信道状态信息的反馈方式的步骤包括： 6. The feedback method according to claim 3, wherein, for the current transmission mode N, N is a positive integer greater than or equal to 9, and the step of the user equipment determining the feedback mode of the channel state information includes:

所述用户设备根据基站侧配置的第一参数 X和第二参数 y, 确定反馈模式 x-y; 其中，所述 CSI-RS的端口数目为 1时，则 y为 0; 所述 CSI-RS的端口数目大于 1时，则 y大于 0; The user equipment determines the feedback mode x-y according to the first parameter X and the second parameter y configured on the base station side; wherein, when the number of ports of the CSI-RS is 1, then y is 0; When the number is greater than 1, then y is greater than 0;

所述的用户设备根据基站侧配置的所述 pmi-RI-Report参数选择所述反馈模式 Mode x-y中的以下两种反馈方式中的其中一种：反馈 PMI、 RI和 CQI; 反馈 RI和 CQI。 The user equipment selects one of the following two feedback modes in the feedback mode Mode x-y according to the pmi-RI-Report parameter configured on the base station side: feedback PMI, RI and CQI; feedback RI and CQI.

7、如权利要求 4或 6所述的反馈方法，其中，所述用户设备根据所述第一参数 X和所述第二参数 y确定反馈模式 x-y的步骤包括： 7. The feedback method according to claim 4 or 6, wherein the step of the user equipment determining the feedback mode x-y according to the first parameter X and the second parameter y includes:

对于非周期反馈，所述第二参数 y为 0, 所述第一参数 X为 2或 3时，则确定的反馈模式分别为模式 2-0、模式 3-0; 所述第二参数 y大于 0, 所述第一参数 X为 2或 3时，则确定的反馈模式分别为模式 1-2、模式 2-2或模式 3-1。 For aperiodic feedback, when the second parameter y is 0 and the first parameter X is 2 or 3, the determined feedback modes are mode 2-0 and mode 3-0 respectively; the second parameter y is greater than 0. When the first parameter X is 2 or 3, the determined feedback modes are mode 1-2, mode 2-2 or mode 3-1 respectively.

8、一种用户设备，所述用户设备包括反馈方式确定模块和反馈模块，其中： 8. A user equipment, the user equipment includes a feedback mode determining module and a feedback module, wherein middle:

所述反馈方式确定模块设置成：根据基站侧配置的 CSI-RS 的端口数目和 pmi-RI-Report参数，确定信道状态信息的反馈方式为以下其中一种：反馈 PML RI和 CQI; 反馈 RI和 CQI; 反馈 CQI; The feedback mode determination module is configured to: determine the feedback mode of channel state information to be one of the following according to the number of CSI-RS ports and pmi-RI-Report parameters configured on the base station side: feedback PML RI and CQI; feedback RI and CQI; feedbackCQI;

所述反馈模块设置成：根据确定的所述反馈方式反馈相应的信道状态信息。 The feedback module is configured to: feed back corresponding channel state information according to the determined feedback method.

9、如权利要求 8所述的用户设备，其中，所述反馈方式确定模块设置成按照如下方式确定信道状态信息的反馈方式： 9. The user equipment according to claim 8, wherein the feedback mode determination module is configured to determine the feedback mode of the channel state information in the following manner:

10、如权利要求 8或 9所述的用户设备，其中，所述反馈方式确定模块设置成按照如下方式根据所述 CSI-RS的端口数目和所述 pmi-RI-Report参数确定信道状态信息的反馈方式： 10. The user equipment according to claim 8 or 9, wherein the feedback mode determination module is configured to determine the channel state information according to the number of ports of the CSI-RS and the pmi-RI-Report parameter in the following manner. Feedback method:

11、如权利要求 10所述的用户设备，其中，所述反馈方式确定模块设置成针对当前的传输模式 N, 其中 N为大于等于 9的正整数，按照以下方式确定信道状态信息的反馈方式： 11. The user equipment according to claim 10, wherein the feedback mode determination module is set to determine the feedback mode of the channel state information for the current transmission mode N, where N is a positive integer greater than or equal to 9, in the following manner:

根据基站侧配置的所述 CSI-RS的端口数目确定反馈模式 x-y的第二参数 y, 所述 CSI-RS的端口数目为 1时，则 y为 0; 所述 CSI-RS的端口数目大于 1时，则 y大于 0; The second parameter y of the feedback mode x-y is determined according to the number of ports of the CSI-RS configured on the base station side. When the number of ports of the CSI-RS is 1, then y is 0; the number of ports of the CSI-RS is greater than 1. When , then y is greater than 0;

根据确定的所述的第二参数 y和基站侧配置的反馈模式的第一参数 X, 确定反馈模式 x-y; 其中 X表示 CQI反馈类型， X为正整数； y表示 PMI反馈类型， y为 0或者正整数； According to the determined second parameter y and the first parameter X of the feedback mode configured on the base station side, the feedback mode xy is determined; where X represents the CQI feedback type, and X is a positive integer; y represents PMI feedback Type, y is 0 or a positive integer;

根据基站侧配置的所述 pmi-RI-Report参数选择所述反馈模式 x-y中的以下两种反馈方式中的其中一种：反馈 PMI、 RI和 CQI; 反馈 RI和 CQI。 Select one of the following two feedback methods in the feedback mode x-y according to the pmi-RI-Report parameter configured on the base station side: feedback PMI, RI and CQI; feedback RI and CQI.

12、如权利要求 10所述的用户设备，其中，所述反馈方式确定模块设置成针对当前的传输模式 N, 其中 N为大于等于 9的正整数，按照以下方式确定信道状态信息的反馈方式： 12. The user equipment according to claim 10, wherein the feedback mode determination module is set to determine the feedback mode of the channel state information for the current transmission mode N, where N is a positive integer greater than or equal to 9, in the following manner:

根据基站侧配置的第一参数 X和第二参数 y, 确定反馈模式 x-y; 其中，所述 CSI-RS的端口数目为 1时，则 y为 0; 所述 CSI-RS的端口数目大于 1 时，则 y大于 0; Determine the feedback mode x-y according to the first parameter , then y is greater than 0;