WO2012151988A1

WO2012151988A1 - Multi-point channel information feedback method, system and terminal

Info

Publication number: WO2012151988A1
Application number: PCT/CN2011/083847
Authority: WO
Inventors: 陈艺戬; 孙云锋; 李儒岳; 徐俊
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-09-30
Filing date: 2011-12-12
Publication date: 2012-11-15
Also published as: CN102377469A; CN102377469B

Abstract

Disclosed is a multi-point channel information feedback method, comprising: a network side designating N sets of channel state information (CSI) to be fed back for periodic CSI feedback and/or non-periodic CSI feedback of a terminal, and configuring corresponding channel state information reference signals (CSI-RSs) for the CSI for measuring the channel state information; and the terminal selecting M sets of CSI in the N sets of CSI for feedback, and notifying the selection information of the CSI to the network side, or the network side selecting M' sets of CSI in the N sets of CSI and instructing the terminal to feed back the M' sets of CSI, where N is a natural number greater than 1, and M and M' are natural numbers greater than zero and not greater than N. Also correspondingly disclosed are a multi-point channel information feedback system and terminal. Through the present invention, the amount of feedback is reduced, and the real-time performance of CSI is ensured, thereby improving the performance of the system.

Description

一种多点信道信息反馈方法、 ***及终端技术领域 Multi-point channel information feedback method, system and terminal

本发明涉及移动通信技术领域，尤其涉及一种多点信道信息反馈方法、 ***及终端。皆景技术 The present invention relates to the field of mobile communications technologies, and in particular, to a multipoint channel information feedback method, system, and terminal. Scenery technology

随着 LTE-A需求的提出，人们对节点平均频谱效率和节点边缘频谱效率越来越重视，相比较而言，节点边缘的频谱效率最受人们关注，这主要是因为 LTE-A ***的上下行都是以正交频分复用（Orthogonal Frequency Division Multiplexing, OFDM ), 或者以 OFDM的某种变形为基本多址复用方式的频分***，与传统的以码分多址（ Code Division Multiple Access , CDMA ) 为基本多址复用方式的无线通信***不同， LTE-A ***没有处理增益，节点内部因为完全频分正交，所以几乎没有干扰问题，但在节点边缘处的干扰处理相对棘手。 With the introduction of LTE-A requirements, people pay more and more attention to the average spectral efficiency of nodes and the spectral efficiency of node edges. In comparison, the spectral efficiency of node edges is the most concerned, mainly because of the upper and lower LTE-A systems. The line is a frequency division system based on Orthogonal Frequency Division Multiplexing (OFDM), or a variant of OFDM as a basic multiple access multiplexing method, and the conventional code division multiple (Code Division Multiple) Access, CDMA) is different for wireless communication systems based on basic multiple access multiplexing. The LTE-A system has no processing gain. Because the internal frequency is orthogonal, there is almost no interference problem, but the interference processing at the edge of the node is relatively difficult. .

目前， LTE中对节点边缘处干扰的处理主要有以下三种方法： Currently, there are three main methods for handling interference at the edge of a node in LTE:

1、干扰随机化； 1. Randomization of interference;

2、干扰消除； 2. Elimination of interference;

3、干扰协调（棘避）。 3. Interference coordination (avoidance).

其中，干扰随机化的方法一般采用跳频、跳时、直扩或者跳码的方法在节点之间减轻干扰的影响，该方法优点是无需网络规划，几乎不需要信令的支持，但该方法只能减轻干扰，并不能从根本上消除干扰；干扰消除的方法虽然能使用某些算法消除干扰，但是一般需要额外的物理实体才能完成较好的干扰消除；干扰协调（棘避）的方法是通过交换节点间的一些信息，使用某些算法使得每个节点自动根据其他节点的反馈信息和自身的情况选择合适的资源进行传输，从而实现节点间资源的高效利用，尽量减轻节点间资源碰撞利用的机会，最终达到节点边缘性能的提升，尽量避免因节点间争用相同时频资源而造成干扰。由于节点边缘用户距离多个相邻节点的天线距离相差不大，因此，可以利用多个节点的发射天线来实现节点边缘处无线链路的较高容量和可靠传输。 The method for interference randomization generally uses frequency hopping, time hopping, direct spreading or code hopping to mitigate the influence of interference between nodes. The advantage of this method is that no network planning is needed, and signaling support is hardly needed, but the method It can only mitigate interference, and can not eliminate interference at all. Although the method of interference cancellation can use some algorithms to eliminate interference, it usually needs additional physical entities to complete better interference cancellation. The method of interference coordination (avoidance) is By exchanging some information between nodes, some algorithms are used to make each node automatically based on feedback information from other nodes and its own The situation selects the appropriate resources for transmission, so as to achieve efficient use of resources between nodes, minimize the opportunity of resource collision and utilization between nodes, and finally achieve the improvement of node edge performance, and try to avoid interference caused by the same time-frequency resources between nodes. Since the antenna distance of the node edge user is not much different from that of multiple adjacent nodes, the transmit antenna of multiple nodes can be utilized to achieve higher capacity and reliable transmission of the wireless link at the edge of the node.

现有多点协作 ( Coordinated Multiple Points transmission and reception, Coordinated Multiple Points transmission and reception,

CoMP )传输的处理流程为：网络侧配置测量集合，具体的集合指示可以是小区 ID 集合，也可以是多个传输节点对应的多套 CSI-RS ( Channel StatThe processing flow of the CoMP transmission is: the network side configures the measurement set, and the specific set indication may be a cell ID set, or may be multiple sets of CSI-RS corresponding to multiple transmission nodes (Channel Stat

Information Reference Resource ) 的集合，终端根据测量集合进行参考信号接收功率（Reference Signal Received Power, RSRP )、或参考信号接收质量 ( Reference Signal Received Quality , RSRQ )、或接收信号强度指示 ( Received Signal Strength Indicator, RSSI )测量，之后，基于该测量结果，由网络侧或终端确定多点协作测量集合，并基于确定的多点协作测量集合进行信道状态的测量和反馈。 A collection of Information Reference Resource ), the terminal performs Reference Signal Received Power (RSRP), or Reference Signal Received Quality (RSRQ), or Received Signal Strength Indicator according to the measurement set. The RSSI) measurement, and then, based on the measurement result, the multi-point coordinated measurement set is determined by the network side or the terminal, and the channel state measurement and feedback are performed based on the determined multi-point coordinated measurement set.

在反馈问题上，现有技术对每节点独立地进行信道状态信息反馈，并指出可以基于该方式进行增强。在第三代合作伙伴计划（3rd Generation Partnership Project, 3 GPP ) 长期演进（ Long Term Evolution, LTE ) 中，信道状态信息一般包括但不限于以下几种： On the feedback issue, the prior art independently performs channel state information feedback for each node and indicates that enhancement can be performed based on this mode. In the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE), channel status information generally includes but is not limited to the following:

信道的特征矢量信息，又称为预编码信息。由于使用码本反馈该预编码信息，也经常称其为预编码矩阵指示（ Precoding Matrix Indicator, PMI ) 信息； The feature vector information of the channel is also referred to as precoding information. Since the precoding information is fed back by using the codebook, it is also often referred to as Precoding Matrix Indicator (PMI) information;

信道质量信息（Channel Quality Information, CQI ), 表征信道的质量信息，以推荐的调制编码方式来表征信道质量，越高阶的调制编码方式表示性能越好， LTE*** 16种 CQI等级选择； Channel Quality Information (CQI), which characterizes the quality of the channel, characterizes the channel quality in the recommended modulation and coding scheme. The higher the order of the modulation and coding scheme, the better the performance. LTE supports 16 CQI level selections.

信道的秩信息（Rank Indication, RI ), 表示信道能支持的空间复用的层数，有时被称为层的信息。 RI为正整数，一般而言 RI的值不超过发射天线的个数 Nt。 Rank Indication (RI) of the channel, indicating spatial multiplexing supported by the channel The number of layers, sometimes referred to as layer information. RI is a positive integer. Generally, the value of RI does not exceed the number Nt of transmitting antennas.

LTE 中存在很多反馈模式，不同的传输模式下有不同的反馈模式，闭环空间复用的传输模式下， PMI/RI/CQI的反馈方式包括周期反馈和非周期反馈，其中，周期反馈主要承载在物理上行控制信道（ Physical Uplink Control Channel, PUCCH )上，是一种最常用的反馈，周期反馈是必须配置的；非周期反馈承载在物理上行共享信道（Physical Uplink Shared Channel , PUSCH )上，非周期反馈是不定期触发型的反馈，属于辅助的反馈方式，是用于提高精度的反馈，其开销一般较大。 There are many feedback modes in LTE. Different feedback modes exist in different transmission modes. In the closed-loop spatial multiplexing transmission mode, the PMI/RI/CQI feedback modes include periodic feedback and aperiodic feedback. The periodic feedback is mainly carried in The Physical Uplink Control Channel (PUCCH) is the most commonly used feedback. The periodic feedback must be configured. The aperiodic feedback is carried on the Physical Uplink Shared Channel (PUSCH). Feedback is an occasional trigger type feedback, which is an auxiliary feedback method, which is a feedback for improving accuracy, and its overhead is generally large.

基于现有技术，单点 CSI反馈只需要反馈一份 CSI, 而对于多点 CSI 反馈，需要反馈多份 CSI, 而 PUCCH上反馈 CSI的传输技术并没有增强，因此造成反馈量很大，具体的： Based on the prior art, single-point CSI feedback only needs to feed back one CSI, and for multi-point CSI feedback, multiple CSIs need to be fed back, and the transmission technology of feedback CSI on PUCCH is not enhanced, thus causing a large amount of feedback, specific :

单点的 CSI在 PUCCH上以模式 2-1进行反馈的情况如图 1所示，其中， WB PMI表示宽带的预编码指示， WB为 wideband缩写； WB CQI表示宽带的 CQI; SB CQI表示自带 CQI, SB为 subband的缩写。需要说明的是，模式 2-1还有一种情况，是 RI与 ΡΉ ( Preoder Type Indicator )联合编码的情况，适用于 8天线。 The case where the single-point CSI is fed back in mode 2-1 on the PUCCH is as shown in FIG. 1 , where WB PMI represents a wideband precoding indication, WB is a wideband abbreviation; WB CQI represents a wideband CQI; SB CQI represents a self-band CQI, SB is an abbreviation for subband. It should be noted that there is another case of mode 2-1, which is a case where RI is combined with Pre (Preoder Type Indicator) and is applied to 8 antennas.

单点的 CSI在 PUCCH上以模式 1-1进行反馈的情况如图 2所示，模式 1-1反馈的情况与模式 2-1类似，只是没有 SB CQI反馈，需要说明的是，模式 1-1还有一种情况，适用于 8天线，是 RI与 8天线码本的第一索引 il 联合编码的情况。 The case where the single-point CSI is fed back in mode 1-1 on PUCCH is as shown in FIG. 2. The mode 1-1 feedback is similar to mode 2-1 except that there is no SB CQI feedback. It should be noted that mode 1 - 1 There is also a case where it is applied to 8 antennas, which is a case where the RI is jointly encoded with the first index il of the 8 antenna codebook.

基于现有技术进行两点 CSI反馈的一种情况如图 3所示，开销较大，更多点的 CSI反馈与两点的 CSI反馈类似，开销会增加更多。 A situation in which two-point CSI feedback is performed based on the prior art is shown in FIG. 3, and the overhead is large. The CSI feedback of more points is similar to the CSI feedback of two points, and the overhead is increased more.

可以看到，由于现在各个节点的 CSI是时分反馈，会造成周期加倍，这样会影响 CSI的实时性，影响下行 MIMO和 COMP的性能。例如，在多个载波聚合 ( CA ) 时，各个载波分量（CC )也是时分的，以 5个载波和 3 个节点来估算， PUCCH上的反馈量会增大 15倍。发明内容 It can be seen that since the CSI of each node is time-division feedback, the cycle is doubled, which affects the real-time performance of CSI and affects the performance of downlink MIMO and COMP. For example, in more For carrier aggregation (CA), each carrier component (CC) is also time-divided, estimated by 5 carriers and 3 nodes, and the feedback amount on PUCCH is increased by 15 times. Summary of the invention

有鉴于此，本发明的主要目的在于提供一种多点信道信息反馈方法、 ***及终端，能够减少反馈量，保证 CSI的实时性，提高***性能。 In view of this, the main object of the present invention is to provide a multi-point channel information feedback method, system and terminal, which can reduce the feedback amount, ensure the real-time performance of CSI, and improve system performance.

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, the technical solution of the present invention is achieved as follows:

一种多点信道信息反馈方法，包括： A multi-point channel information feedback method includes:

网络侧为终端的周期 CSI反馈和 /或非周期 CSI反馈指定 N套需要反馈的信道状态信息 CSI, 并为所述 CSI 配置相应的信道状态信息参考信号 CSI-RS用于信道状态信息测量； The network side is the period of the terminal CSI feedback and/or the aperiodic CSI feedback specifies N sets of channel state information CSI that need to be fed back, and configures a corresponding channel state information reference signal CSI-RS for the CSI for channel state information measurement;

终端选择所述 N套 CSI中的 M套 CSI进行反馈，并将 CSI的选择信息告知网络侧，或者，网络侧选择 N套 CSI中的 M，套 CSI, 并指示终端对所述 M，套 CSI进行反馈，其中， N为大于 1的自然数， M、 M，为大于零且不大于 N的自然数。 The terminal selects the M sets of CSIs in the N sets of CSIs for feedback, and informs the network side of the CSI selection information, or the network side selects the Ms of the N sets of CSIs, sets the CSI, and indicates the terminal to the M, the set of CSIs. Feedback is performed, where N is a natural number greater than 1, and M, M is a natural number greater than zero and not greater than N.

所述 M的取值预先规定或由网络侧通过信令配置。 The value of the M is pre-specified or configured by the network side through signaling.

所述 M或 M'的取值为 1或 2。 The value of the M or M' is 1 or 2.

所述 M或 M'为 q时，所述终端将 CSI的选择信息告知网络侧为：终端使用「log₂ C^bit信息或 (^个状态位来指示选择的 CSI, q为大于零且不大于 N的自然数。 When the M or M' is q, the terminal informs the network side of the CSI selection information that the terminal uses: "log ₂ C^bit information or (^ status bits to indicate the selected CSI, q is greater than zero and not A natural number greater than N.

所述终端将 CSI的选择信息告知网络侧为：所述终端通过上行物理层信道中的指示 CSI选择的信令将 CSI的选择信息告知网络侧。 The terminal informs the network side of the CSI selection information that: the terminal informs the network side of the CSI selection information by using the signaling indicating the CSI selection in the uplink physical layer channel.

所述终端通过指示 CSI选择的信令将 CSI的选择信息告知网络侧为：所述指示 CSI选择的信令与秩信息 RI进行联合编码，或者， The terminal notifies the network side of the CSI selection information by using the signaling indicating the CSI selection: the signaling indicating the CSI selection is jointly encoded with the rank information RI, or

所述指示 CSI选择的信令和 8天线第一预编码 il进行联合编码，或者，所述指示 CSI选择的信令和 RI、 PTI进行联合编码，或者，所述指示 CSI选择的信令和 RI、 8天线第一预编码 il进行联合编码。一种多点信道信息反馈***，包括网络侧和终端，其中， The signaling indicating the CSI selection and the 8-antenna first pre-coding il are jointly encoded, or the signaling indicating the CSI selection is jointly encoded with the RI and the PTI, or The signaling indicating the CSI selection and the RI, the 8 antenna first precoding il are jointly encoded. A multi-point channel information feedback system includes a network side and a terminal, where

所述网络侧，设置为为终端的周期 CSI反馈和 /或非周期 CSI反馈指定 The network side is set to specify the period CSI feedback and/or aperiodic CSI feedback of the terminal.

N套需要反馈的 CSI, 并为所述 CSI配置相应的 CSI-RS用于信道状态信息测量； N sets of CSIs to be fed back, and configuring corresponding CSI-RSs for the CSI for channel state information measurement;

所述终端，设置为选择所述 N套 CSI中的 M套 CSI进行反馈，并将 CSI的选择信息告知网络侧，其中， N为大于 1的自然数， M为大于零且不大于 N的自然数。 The terminal is configured to select the M sets of CSIs in the N sets of CSIs for feedback, and inform the network side of the CSI selection information, where N is a natural number greater than 1, and M is a natural number greater than zero and not greater than N.

所述 M为 q时，所述终端将 CSI的选择信息告知网络侧为：终端使用「log₂ ]bit信息或 (^个状态位来指示选择的 CSI。 When the M is q, the terminal informs the network side of the CSI selection information that the terminal uses the "log ₂ ] bit information or the (^ status bits to indicate the selected CSI.

所述指示 CSI选择的信令和 8天线第一预编码 il进行联合编码，或者，所述指示 CSI选择的信令和 RI、 PTI进行联合编码，或者， The signaling indicating the CSI selection and the 8-antenna first pre-coding il are jointly encoded, or the signaling indicating the CSI selection is jointly encoded with the RI and the PTI, or

所述指示 CSI选择的信令和 RI、 8天线第一预编码 il进行联合编码。一种多点信道信息反馈***，包括网络侧和终端，其中， The signaling indicating the CSI selection and the RI, the 8 antenna first precoding il are jointly encoded. A multi-point channel information feedback system includes a network side and a terminal, where

所述网络侧，设置为为终端的周期 CSI反馈和 /或非周期 CSI反馈指定 N套需要反馈的 CSI, 并为所述 CSI配置相应的 CSI-RS用于信道状态信息测量；以及选择 N套 CSI中的 M，套 CSI, 指示终端对所述 M，套 CSI进行反馈； The network side is configured to specify N sets of CSIs that need to be fed back for periodic CSI feedback and/or aperiodic CSI feedback of the terminal, and configure corresponding CSI-RSs for channel state information measurement for the CSI; and select N sets M in the CSI, set CSI, indicating that the terminal feeds back to the M and the set of CSI;

所述终端，设置为根据网络侧的指示对所述 M，套 CSI进行反馈，其中， N为大于 1的自然数， M'为大于零且不大于 N的自然数。一种多点信道信息反馈终端，包括：选择单元、反馈单元和通知单元；其中，反馈指定 N套需要反馈的信道状态信息 CSI, 并为所述 CSI配置相应的信道状态信息参考信号 CSI-RS用于信道状态信息测量的场景下，选择 N套 CSI中的 M套 CSI, 其中， N为大于 1的自然数， M为大于零且不大于 N 的自然数； The terminal is configured to feed back the M and the set of CSI according to an indication of the network side, where N is a natural number greater than 1, and M′ is a natural number greater than zero and not greater than N. A multi-point channel information feedback terminal includes: a selection unit, a feedback unit, and a notification unit; wherein, the feedback specifies N sets of channel state information CSI that need to be fed back, and configures a corresponding channel state information reference signal CSI-RS for the CSI In the scenario for channel state information measurement, select M sets of CSIs in N sets of CSI, where N is a natural number greater than 1, and M is a natural number greater than zero and not greater than N;

所述反馈单元，设置为对所述选择单元选择的 M套 CSI进行反馈；所述通知单元，设置为将所述 CSI的选择信息告知网络侧。 The feedback unit is configured to feed back the M sets of CSI selected by the selection unit, and the notification unit is configured to notify the network side of the selection information of the CSI.

所述 M为 q时，所述终端将 CSI的选择信息告知网络侧为：终端使用 When the M is q, the terminal informs the network side of the CSI selection information:

Γ^{1ο§2 C}^lbit信息或 < ^个状态位来指示选择的 CSI。 Γ ^{1ο§2 C} ^lbit information or < ^ status bits to indicate the selected CSI.

所述通知单元将 CSI的选择信息告知网络侧为：所述终端通过上行物理层信道中的指示 CSI选择的信令将 CSI的选择信息告知网络侧。 The notification unit notifies the network side of the selection information of the CSI to: the terminal notifies the network side of the selection information of the CSI by using the signaling indicating the CSI selection in the uplink physical layer channel.

所述通知单元通过指示 CSI选择信令将 CSI的选择信息告知网络侧为：所述指示 CSI选择的信令与秩信息 RI进行联合编码，或者， The notification unit notifies the network side of the CSI selection information by indicating the CSI selection signaling: the signaling indicating the CSI selection is jointly encoded with the rank information RI, or

所述指示 CSI选择的信令和 RI、 8天线第一预编码 il进行联合编码。一种多点信道信息反馈终端，设置为根据网络侧的指示对 M，套 CSI进行反馈，其中，网络侧为终端的周期 CSI反馈和 /或非周期 CSI反馈指定 N 套需要反馈的 CSI, N为大于 1的自然数， M，为大于零且不大于 N的自然数。 The signaling indicating the CSI selection and the RI, the 8 antenna first precoding il are jointly encoded. A multi-point channel information feedback terminal is configured to feed back the M and the set of CSI according to the indication of the network side, wherein the network side specifies the CSI, N, which needs feedback, for the periodic CSI feedback and/or the aperiodic CSI feedback of the terminal. For a natural number greater than 1, M is a natural number greater than zero and no greater than N.

本发明多点信道信息反馈方法、 ***及终端，网络侧为终端的周期 CSI 反馈和 /或非周期 CSI反馈指定 N套需要反馈的信道状态信息 CSI, 并为所述 CSI配置相应的信道状态信息参考信号 CSI-RS用于信道状态信息测量；终端选择所述 N套 CSI中的 M套 CSI进行反馈，并将 CSI的选择信息告知网络侧，或者，网络侧选择 N套 CSI中的 M，套 CSI,并指示终端对所述 M，套 CSI进行反馈，其中， N为大于 1的自然数， M、 M，为大于零且不大于 N的自然数。通过本发明，减少了反馈量，保证了 CSI的实时性，提高了 ***性能。附图说明 The multi-point channel information feedback method, system and terminal of the present invention, the network side specifies N sets of channel state information CSI to be fed back for periodic CSI feedback and/or aperiodic CSI feedback of the terminal, and configures corresponding channel state information for the CSI. The reference signal CSI-RS is used for channel state information measurement; The terminal selects the M sets of CSIs in the N sets of CSIs for feedback, and notifies the network side of the CSI selection information, or the network side selects the Ms of the N sets of CSIs, sets the CSI, and indicates the terminal to the M, the set of CSIs. Feedback is performed, where N is a natural number greater than 1, and M, M is a natural number greater than zero and not greater than N. Through the invention, the feedback amount is reduced, the real-time performance of the CSI is ensured, and the system performance is improved. DRAWINGS

图 1为现有技术中，单点的 CSI在 PUCCH上以模式 2-1进行反馈的情况示意图； 1 is a schematic diagram of a case where a single-point CSI is fed back in mode 2-1 on a PUCCH in the prior art;

图 2为现有技术中，单点的 CSI在 PUCCH上以模式 1-1进行反馈的情况示意图； 2 is a schematic diagram of a case where a single-point CSI is fed back on the PUCCH in mode 1-1 in the prior art;

图 3为基于现有技术进行两点 CSI反馈的一种情况示意图； FIG. 3 is a schematic diagram of a situation in which two-point CSI feedback is performed based on the prior art;

图 4为本发明多点信道信息反馈方法流程示意图。具体实施方式 4 is a schematic flow chart of a multi-point channel information feedback method according to the present invention. detailed description

本发明的基本思想是：网络侧为终端的周期 CSI反馈和 /或非周期 CSI 反馈指定 N套需要反馈的信道状态信息 CSI, 并为所述 CSI配置相应的信道状态信息参考信号 CSI-RS用于信道状态信息测量；终端选择所述 N套 CSI中的 M套 CSI进行反馈，并将 CSI的选择信息告知网络侧，或者，网络侧选择 N套 CSI中的 M，套 CSI, 并指示终端对所述 M，套 CSI进行反馈，其中， N为大于 1的自然数， M、 M，为大于零且不大于 N的自然数。。 The basic idea of the present invention is: the network side specifies N sets of channel state information CSI to be fed back for periodic CSI feedback and/or aperiodic CSI feedback of the terminal, and configures corresponding channel state information reference signal CSI-RS for the CSI. The channel status information is measured; the terminal selects the M sets of CSIs in the N sets of CSIs for feedback, and informs the network side of the CSI selection information, or the network side selects the M sets of the C sets of CSIs, sets the CSI, and indicates the terminal pair. The M, the set CSI performs feedback, wherein N is a natural number greater than 1, and M, M are natural numbers greater than zero and not greater than N. .

图 4为本发明多点信道信息反馈方法流程示意图，如图 4所示，该方法包括： 4 is a schematic flowchart of a multi-point channel information feedback method according to the present invention. As shown in FIG. 4, the method includes:

步驟 401 : 网络侧为终端的周期 CSI反馈和 /或非周期 CSI反馈指定 N 套需要反馈的 CSI , 并为所述 CSI 配置相应的信道状态信息参考信号 ( CSI-RS )用于信道状态信息测量。步驟 402: 终端选择所述 N套 CSI中的 M套 CSI进行反馈，并将 CSI 的选择信息告知网络侧，或者，网络侧选择 N套 CSI中的 M，套 CSI, 并指示终端对所述 M，套 CSI进行反馈，其中， N为大于 1 的自然数， M、 M，为大于零且不大于 N的自然数。 Step 401: The network side specifies N sets of CSIs that need to be fed back for periodic CSI feedback and/or aperiodic CSI feedback of the terminal, and configures a corresponding channel state information reference signal (CSI-RS) for channel state information measurement for the CSI. . Step 402: The terminal selects the M sets of CSIs in the N sets of CSIs for feedback, and informs the network side of the CSI selection information, or the network side selects the Ms of the N sets of CSIs, sets the CSI, and indicates the terminal to the M. The CSI is used for feedback, where N is a natural number greater than 1, and M, M is a natural number greater than zero and not greater than N.

需要说明的是，所述 M的取值预先规定或由网络侧通过信令配置。需要说明的是，网络侧选择 N套 CSI中的 M，套 CSI后，指示终端对所述 M，套 CSI进行反馈的信息可以在在下行物理层控制信道传输，并且和触发非周期反馈的指示信令放在一个报告格式内，进一步的可以是 bitmap的方式。 It should be noted that the value of the M is preset or configured by the network side through signaling. It should be noted that the network side selects the M in the N sets of CSIs, and after the CSI is set, the information indicating that the terminal feedbacks the M and the set of CSIs may be transmitted on the downlink physical layer control channel, and the indication of triggering the aperiodic feedback is triggered. The signaling is placed in a report format, and further can be a bitmap method.

M或 M，为 q时， UE可以使用「^{lGg2 C}^bit信息或 ^C个状态位来指示选择的 CSI, q为大于零且不大于 N的自然数。 When M or M is q, the UE may use " ^{lGg2 C} ^bit information or ^C status bits to indicate the selected CSI, and q is a natural number greater than zero and not greater than N.

优选的， M或 M，的取值为 1或 2, N为 3的场景下，当 M为 1时， Preferably, if M or M is 1 or 2 and N is 3, when M is 1,

UE可以使用「^lQg2 bit信息或 N个状态位来指示选择的 CSI,当 M为 2时， The UE may use " ^lQg2 bit information or N status bits to indicate the selected CSI. When M is 2,

UE可以使用「^lQg2 bit信息或 N个状态位来指示选择的 CSI。 The UE may use " ^lQg2 bit information or N status bits to indicate the selected CSI.

对于步驟 402,终端可以通过上行物理层信道中的指示 CSI选择的信令将 CSI的选择信息告知网络侧。 For step 402, the terminal may inform the network side of the CSI selection information by using signaling indicating CSI selection in the uplink physical layer channel.

这里，所述终端通过指示 CSI选择的信令将 CSI的选择信息告知网络侧可以为： Here, the terminal notifying the network side of the selection information of the CSI by using the signaling indicating the CSI selection may be:

所述指示 CSI选择的信令与秩信息 RI进行联合编码，或者， The signaling indicating the CSI selection is jointly encoded with the rank information RI, or

所述指示 CSI选择的信令和 RI、 8天线第一预编码 il进行联合编码。本发明还相应地提出了一种多点信道信息反馈***，该***包括：网络侧和终端，其中，套需要反馈的 CSI, 并为所述 CSI配置相应的 CSI-RS用于信道状态信息测量； The signaling indicating the CSI selection and the RI, the 8 antenna first precoding il are jointly encoded. The present invention also correspondingly proposes a multi-point channel information feedback system, the system comprising: a network side and a terminal, wherein Configuring a CSI that needs to be fed back, and configuring a corresponding CSI-RS for the CSI for channel state information measurement;

所述终端 , 用于选择所述 N套 CSI中的 M套 CSI进行反馈，并将 CSI 的选择信息告知网络侧，其中， N为大于 1的自然数， M为大于零且不大于 N的自然数。 The terminal is configured to select the M sets of CSIs in the N sets of CSIs for feedback, and notify the network side of the CSI selection information, where N is a natural number greater than 1, and M is a natural number greater than zero and not greater than N.

所述指示 CSI选择的信令和 RI、 8天线第一预编码 il进行联合编码。本发明还相应地提出了一种多点信道信息反馈***，该***包括网络侧和终端，其中，套需要反馈的 CSI, 并为所述 CSI配置相应的 CSI-RS用于信道状态信息测量；以及选择 N套 CSI中的 M，套 CSI, 指示终端对所述 M，套 CSI进行反々矣. The signaling indicating the CSI selection and the RI, the 8 antenna first precoding il are jointly encoded. The present invention also provides a multi-point channel information feedback system, which includes a network side and a terminal, where a CSI that needs feedback is set, and a corresponding CSI-RS is configured for the CSI for channel state information measurement; And selecting M in the set of CSIs, and setting the CSI, instructing the terminal to counter the M and the set of CSI.

贝 , Shell,

所述终端，用于根据网络侧的指示对所述 M'套 CSI进行反馈，其中， N为大于 1的自然数， M'为大于零且不大于 N的自然数。 The terminal is configured to feed back the M′ set of CSI according to an indication of the network side, where N is a natural number greater than 1, and M′ is a natural number greater than zero and not greater than N.

本发明还相应地提出了一种多点信道信息反馈终端，该多点信道信息反馈终端包括：选择单元、反馈单元和通知单元；其中，所述选择单元，用于在网络侧为终端的周期 CSI反馈和 /或非周期 CSI 反馈指定 N套需要反馈的信道状态信息 CSI, 并为所述 CSI配置相应的信道状态信息参考信号 CSI-RS用于信道状态信息测量的场景下，选择 N套 CSI中的 M套 CSI, 其中， N为大于 1的自然数， M为大于零且不大于 N 的自然数； The present invention also provides a multi-point channel information feedback terminal, which includes: a selection unit, a feedback unit, and a notification unit; The selecting unit is configured to specify, according to the periodic CSI feedback and/or the aperiodic CSI feedback of the terminal, the N sets of channel state information CSI that needs to be fed back, and configure a corresponding channel state information reference signal CSI-RS for the CSI. In the scenario for channel state information measurement, select M sets of CSIs in N sets of CSI, where N is a natural number greater than 1, and M is a natural number greater than zero and not greater than N;

所述反馈单元，用于对所述选择单元选择的 M套 CSI进行反馈；所述通知单元，用于将所述 CSI的选择信息告知网络侧。 The feedback unit is configured to feed back the M sets of CSIs selected by the selecting unit, and the notifying unit is configured to notify the network side of the selection information of the CSI.

所述指示 CSI选择的信令和 RI、 8天线第一预编码 il进行联合编码。本发明还相应地提出了一种多点信道信息反馈终端，该反馈终端用于根据网络侧的指示对 M，套 CSI进行反馈，其中，网络侧为终端的周期 CSI 反馈和 /或非周期 CSI反馈指定 N套需要反馈的 CSI, N为大于 1的自然数， The signaling indicating the CSI selection and the RI, the 8 antenna first precoding il are jointly encoded. The present invention also proposes a multi-point channel information feedback terminal, which is used for feeding back M and CSI according to the indication of the network side, wherein the network side is the periodic CSI feedback and/or the aperiodic CSI of the terminal. The feedback specifies N sets of CSIs that need feedback, and N is a natural number greater than 1.

M，为大于零且不大于 N的自然数。 M, is a natural number greater than zero and not greater than N.

下面结合具体实施例对本发明的技术方案作进一步详细说明。实施例 1 The technical solution of the present invention will be further described in detail below with reference to specific embodiments. Example 1

基站给 UE配置了 3套 CSI-RS, —般每个节点配置 1套 CSI, 但也有一些其他情况。 UE根据这 3套 CSI-RS, 并按照高层的配置参数按照规定进行测量，得到三套 CSI, CSI包括 RI、 CQI、 PMI中的一种或多种。 The base station configures three sets of CSI-RSs for the UE. Generally, one set of CSIs is configured for each node, but there are some other cases. According to the three sets of CSI-RS, the UE follows the high-level configuration parameters. The measurement is performed to obtain three sets of CSI, and the CSI includes one or more of RI, CQI, and PMI.

UE可以选择 3套 CSI中最好的一套，进行反馈，比如，选择了第 1套 The UE can select the best of the three sets of CSI and give feedback, for example, the first set is selected.

CSI。 CSI.

UE可以把选择的是第一套 CSI进行反馈的信息通过 PUCCH传输给基站，比如，通过 2bit, 4个状态的控制信令，具体状态如表 1所示： The UE may transmit the information that is selected by the first set of CSIs to the base station through the PUCCH, for example, through 2 bits, 4 states of control signaling, and the specific states are as shown in Table 1:

表 1 Table 1

UE可以增加一个 Report Type来反馈这 2bit信令。实施例 2 The UE can add a Report Type to feed back the 2 bit signaling. Example 2

基站给 UE配置了 3套 CSI-RS, —般每个节点配置 1套 CSI, 但也有一些其他情况。 UE根据这 3套 CSI-RS, 并按照高层的配置参数按照规定进行测量，得到三套 CSI, CSI包括 RI、 CQI、 PMI中的一种或多种。 The base station configures three sets of CSI-RSs for the UE. Generally, one set of CSI is configured for each node, but there are some other cases. The UE performs measurement according to the three sets of CSI-RSs according to the high-level configuration parameters, and obtains three sets of CSIs, and the CSI includes one or more of RI, CQI, and PMI.

CSI。 CSI.

UE可以把选择的是第一套 CSI进行反馈的指示信息通过 PUCCH传输给基站，比如 4个状态的控制信令与实施例 1类似。 The UE may transmit the indication information that is selected by the first set of CSIs to the base station through the PUCCH. For example, the control signaling of the four states is similar to that of Embodiment 1.

上述指示信息可以和选择的这一套 CSI 的 RI 进行联合编码。对于 COMP 来说，多个节点一般都是低秩的情况，因此对于需要多点反馈的情况，可以限制 RI的取值为 {1,2} ,那么联合编码涉及的状态可以如表 2所示：

010 选择第 2套 CSI,RI=1 The above indication information can be jointly encoded with the selected set of CSI RIs. For COMP, multiple nodes are generally low-rank, so for the case where multi-point feedback is required, the value of RI can be limited to {1, 2}, then the state involved in joint coding can be as shown in Table 2. :

010 Select the second set of CSI, RI=1

on 选择第 2套 CSI,RI=2 On Select the second set of CSI, RI=2

100 选择第 3套 CSI,RI=1 100 Select the third set of CSI, RI=1

101 选择第 3套 CSI,RI=2 101 Select the third set of CSI, RI=2

110 选择第 4套 CSI,RI=1 110 Select the fourth set of CSI, RI=1

111 选择第 4套 CSI,RI=2 111 Select the fourth set of CSI, RI=2

表 2 实施例 3 Table 2 Example 3

本实施例中，指示信息可以与 RI、 ΡΉ—起联合编码，具体情况如表 3 所示： In this embodiment, the indication information may be jointly coded with RI and ,, as shown in Table 3:

1100 选择第 4套 CSI,RI=1 , PTI=0

1100 Select the fourth set of CSI, RI=1, PTI=0

1101 选择第 4套 CSI,RI=1 , PTI=11101 Select the fourth set of CSI, RI=1, PTI=1

1110 选择第 4套 CSI,RI=2, PTI=01110 Select the fourth set of CSI, RI=2, PTI=0

1111 选择第 4套 CSI,RI=2, PTI=1 1111 Select the fourth set of CSI, RI=2, PTI=1

表 3 实施例 4 Table 3 Example 4

与实施例 2相似，被选择小区为 8天线时，指示信息可以与 RI、 il一起联合编码。限制 RI=1,2, Rl+il 目前为 4个 bit,可以增加 2个 bit的指示信 Similar to the second embodiment, when the selected cell is 8 antennas, the indication information can be jointly encoded with RI and il. Restriction RI=1,2, Rl+il is currently 4 bits, can add 2 bit indication

实施例 5 Example 5

UE可以选择 3套 CSI中最好的两套，进行反馈，比如，选择了第 1 , 2 套 CSI。 The UE can select the best two of the three sets of CSI and provide feedback, for example, selecting the first and second sets of CSI.

UE可以把选择的是第一套 CSI进行反馈的信息通过 PUCCH传输给基站，比如通过 2bit, 4个状态的控制信令，具体状态如表 4所示： The UE may transmit the information that is selected by the first set of CSIs to the base station through the PUCCH, for example, through 2 bits, 4 states of control signaling, and the specific states are as shown in Table 4:

表 4 Table 4

实施例 6 基站给 UE配置了 1套 CSI-RS, —般每个节点配置 1套 CSI, 但也有一些其他情况。 UE根据这 2套 CSI-RS, 并按照高层的配置参数按照规定进行测量，得到 2套 CSI, CSI包括 RI、 CQI、 PMI中的一种或多种。 Example 6 The base station configures one set of CSI-RSs for the UE. Generally, one set of CSI is configured for each node, but there are some other cases. The UE performs measurement according to the two sets of CSI-RSs according to the high-level configuration parameters, and obtains two sets of CSIs, and the CSI includes one or more of RI, CQI, and PMI.

UE可以选择 2套 CSI中最好的 1套，进行反馈，比如，选择了第 1套 CSI。 The UE can select the best of the 2 sets of CSI and provide feedback, for example, selecting the first set of CSI.

UE可以把选择的是第一套 CSI进行反馈的信息通过 PUCCH传输给基站，比如通过 lbit, 2个状态的控制信令，具体状态如表 5所示：

The UE may transmit the information that is selected by the first set of CSIs to the base station through the PUCCH, for example, through lbit, two state control signaling, and the specific states are as shown in Table 5:

表 5 实施例 7 Table 5 Example 7

基站可以通过 RRC信令，通知给 UE, 告知其应该从 N套 CSI种选出少套来反馈。实施例 8 The base station can notify the UE through RRC signaling that it should select a small set of feedback from the N sets of CSIs. Example 8

基站可通过高层信令为 UE配置了 4套 CSI-RS, —般每个节点配置 1 套 CSI, 但也有一些其他情况。 The base station can configure four sets of CSI-RSs for the UE through high-level signaling. Generally, one set of CSI is configured for each node, but there are some other cases.

基站进一步的可以通过信令指出，非周期反馈时，每次测量是基于哪一套 CSI-RS的： The base station can further indicate by signaling whether, for acyclic feedback, each measurement is based on which CSI-RS:

比如，通过信令触发一次非周期的 CSI反馈，并指示具体是测量哪一套 CSI-RS对应的 CSI: For example, triggering a non-periodic CSI feedback through signaling, and indicating which CSI-RS corresponding CSI is measured:

指示信令可以是 bitmap的方式，如此处 4套 CSI-RS, 因此需要 4bit 指示信令，可以和非周期 CSI反馈的触发信令一起传输： The indication signaling may be a bitmap mode, such as 4 sets of CSI-RSs here, so 4bit indication signaling is required, which can be transmitted together with the trigger signaling of the aperiodic CSI feedback:

比如，触发第 1套 CSI反馈，可以是 0001指示，触发 1,3套 CSI反馈，可以是 0101 , 触发第 2套可以是 0010。终端得到指示后，根据基站的指示，测量和反馈相应的 CSI信息。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。 For example, triggering the first set of CSI feedback may be 0001 indication, triggering 1, 3 sets of CSI feedback, which may be 0101, and triggering the second set may be 0010. After the terminal is instructed, the corresponding CSI information is measured and fed back according to the indication of the base station. 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驟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驟，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驟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。 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.

Claims

1、一种多点信道信息反馈方法，其中，该方法包括： A multi-point channel information feedback method, wherein the method comprises:

网络侧为终端的周期信道状态信息 CSI反馈和 /或非周期 CSI反馈指定 N 套需要反馈的 CSI, 并为所述 CSI 配置相应的信道状态信息参考信号 CSI-RS用于信道状态信息测量； The network side is the periodic channel state information of the terminal, and the CSI feedback and/or aperiodic CSI feedback specifies N sets of CSIs that need to be fed back, and configures corresponding channel state information reference signals CSI-RS for the CSI for channel state information measurement;

2、根据权利要求 1所述的多点信道信息反馈方法，其中，所述 M的取值预先规定或由网络侧通过信令配置。 The multi-point channel information feedback method according to claim 1, wherein the value of the M is pre-specified or configured by the network side through signaling.

3、根据权利要求 1所述的多点信道信息反馈方法，其中，所述 M或 M'的取值为 1或 2。 The multi-point channel information feedback method according to claim 1, wherein the value of the M or M' is 1 or 2.

4、根据权利要求 1所述的多点信道信息反馈方法，其中，所述 M或 M'为 q时，所述终端将 CSI的选择信息告知网络侧为：终端使用「log₂ C^bit 信息或个状态位来指示选择的 CSI, q为大于零且不大于 N的自然数。 The multi-point channel information feedback method according to claim 1, wherein, when the M or M' is q, the terminal informs the network side that the CSI selection information is: the terminal uses "log ₂ C^bit information. Or a status bit to indicate the selected CSI, q is a natural number greater than zero and no greater than N.

5、根据权利要求 1至 4任一项所述的多点信道信息反馈方法，其中，所述终端将 CSI的选择信息告知网络侧为：所述终端通过上行物理层信道中的指示 CSI选择的信令将 CSI的选择信息告知网络侧。 The multi-point channel information feedback method according to any one of claims 1 to 4, wherein the terminal informs the network side of the CSI selection information that: the terminal selects CSI through the uplink physical layer channel. The signaling informs the network side of the selection information of the CSI.

6、根据权利要求 5所述的多点信道信息反馈方法，其中，所述终端通过指示 CSI选择的信令将 CSI的选择信息告知网络侧为： The multi-point channel information feedback method according to claim 5, wherein the terminal informs the network side of the selection information of the CSI by signaling indicating CSI selection:

所述指示 CSI选择的信令和 8天线第一预编码 il进行联合编码，或者，所述指示 CSI选择的信令和 RI、 ΡΉ进行联合编码，或者，所述指示 CSI选择的信令和 RI、 8天线第一预编码 il进行联合编码。The signaling indicating the CSI selection and the 8-antenna first pre-coding il are jointly encoded, or the signaling indicating the CSI selection is jointly encoded with the RI and the ,, or The signaling indicating the CSI selection and the RI, the 8 antenna first precoding il are jointly encoded.

7、一种多点信道信息反馈***，其中，该***包括网络侧和终端，其中， A multi-point channel information feedback system, wherein the system comprises a network side and a terminal, wherein

所述网络侧，设置为为终端的周期 CSI反馈和 /或非周期 CSI反馈指定 N套需要反馈的 CSI, 并为所述 CSI配置相应的 CSI-RS用于信道状态信息测量； The network side is configured to specify N sets of CSIs that need to be fed back for periodic CSI feedback and/or aperiodic CSI feedback of the terminal, and configure corresponding CSI-RSs for channel state information measurement for the CSI;

8、根据权利要求 7所述的多点信道信息反馈***，其中，所述 M的取值预先规定或由网络侧通过信令配置。 The multi-point channel information feedback system according to claim 7, wherein the value of the M is specified in advance or configured by the network side by signaling.

9、根据权利要求 7所述的多点信道信息反馈***，其中，所述 M为 q 时，所述终端将 CSI的选择信息告知网络侧为：终端使用「log₂ C^bit信息或个状态位来指示选择的 CSI。 The multi-point channel information feedback system according to claim 7, wherein, when the M is q, the terminal notifies the network side of the selection information of the CSI to: the terminal uses "log ₂ C^bit information or status" Bit to indicate the selected CSI.

10、根据权利要求 7至 9任一项所述的多点信道信息反馈***，其中，所述终端将 CSI的选择信息告知网络侧为：所述终端通过上行物理层信道中的指示 CSI选择的信令将 CSI的选择信息告知网络侧。 The multi-point channel information feedback system according to any one of claims 7 to 9, wherein the terminal informs the network side of the CSI selection information that: the terminal selects CSI through the uplink physical layer channel. The signaling informs the network side of the selection information of the CSI.

11、根据权利要求 10所述的多点信道信息反馈***，其中，所述终端通过指示 CSI选择的信令将 CSI的选择信息告知网络侧为： The multi-point channel information feedback system according to claim 10, wherein the terminal informs the network side of the selection information of the CSI by signaling indicating CSI selection:

所述指示 CSI选择的信令和 RI、 8天线第一预编码 il进行联合编码。 The signaling indicating the CSI selection and the RI, the 8 antenna first precoding il are jointly encoded.

12、一种多点信道信息反馈***，其中，该***包括网络侧和终端，其中，所述网络侧，设置为为终端的周期 CSI反馈和 /或非周期 CSI反馈指定 N套需要反馈的 CSI, 并为所述 CSI配置相应的 CSI-RS用于信道状态信息测量；以及选择 N套 CSI中的 M，套 CSI, 指示终端对所述 M，套 CSI进行反馈； 12. A multi-point channel information feedback system, where the system includes a network side and a terminal, where The network side is configured to specify N sets of CSIs that need to be fed back for periodic CSI feedback and/or aperiodic CSI feedback of the terminal, and configure corresponding CSI-RSs for channel state information measurement for the CSI; and select N sets M in the CSI, set CSI, indicating that the terminal feeds back to the M and the set of CSI;

所述终端，设置为根据网络侧的指示对所述 M，套 CSI进行反馈，其中， N为大于 1的自然数， M'为大于零且不大于 N的自然数。 The terminal is configured to feed back the set of CSI according to the indication of the network side, where N is a natural number greater than 1, and M' is a natural number greater than zero and not greater than N.

13、一种多点信道信息反馈终端，其中，该多点信道信息反馈终端包括：选择单元、反馈单元和通知单元；其中，反馈指定 N套需要反馈的信道状态信息 CSI, 并为所述 CSI配置相应的信道状态信息参考信号 CSI-RS用于信道状态信息测量的场景下，选择 N套 CSI中的 M套 CSI, 其中， N为大于 1的自然数， M为大于零且不大于 N 的自然数； A multi-point channel information feedback terminal, wherein the multi-point channel information feedback terminal comprises: a selection unit, a feedback unit, and a notification unit; wherein, the feedback specifies N sets of channel state information CSI to be fed back, and is the CSI In the scenario where the corresponding channel state information reference signal CSI-RS is configured for channel state information measurement, M sets of CSIs in N sets of CSI are selected, where N is a natural number greater than 1, and M is a natural number greater than zero and not greater than N ;

14、根据权利要求 13所述的多点信道信息反馈终端，其中，所述 M为 q时，所述终端将 CSI的选择信息告知网络侧为：终端使用「^{1()g2 C}^bit信息或 < ^个状态位来指示选择的 CSI。 The multi-point channel information feedback terminal according to claim 13, wherein, when the M is q, the terminal notifies the network side of the selection information of the CSI to: the terminal uses " ^{1()g2 C} ^bit information or < ^ status bits to indicate the selected CSI.

15、根据权利要求 13所述的多点信道信息反馈终端，其中，所述通知单元将 CSI的选择信息告知网络侧为：所述终端通过上行物理层信道中的指示 CSI选择的信令将 CSI的选择信息告知网络侧。 The multi-point channel information feedback terminal according to claim 13, wherein the notification unit notifies the network side of the selection information of the CSI to: the terminal sends the CSI through the signaling indicating the CSI selection in the uplink physical layer channel. The selection information informs the network side.

16、根据权利要求 13所述的多点信道信息反馈终端，其中，所述通知单元通过指示 CSI选择信令将 CSI的选择信息告知网络侧为： The multipoint channel information feedback terminal according to claim 13, wherein the notification unit notifies the network side of the selection information of the CSI by instructing CSI selection signaling:

所述指示 CSI选择的信令和 8天线第一预编码 il进行联合编码，或者，所述指示 CSI选择的信令和 RI、 PTI进行联合编码，或者，所述指示 CSI选择的信令和 RI、 8天线第一预编码 il进行联合编码。 The signaling indicating the CSI selection and the 8-antenna first pre-coding il are jointly encoded, or The signaling indicating the CSI selection is jointly coded with the RI and the PTI, or the signaling indicating the CSI selection and the RI, the 8 antenna first precoding il are jointly encoded.

17、一种多点信道信息反馈终端，其中，该多点信道信息反馈终端用于根据网络侧的指示对 M，套 CSI进行反馈，其中，网络侧为终端的周期 CSI反馈和 /或非周期 CSI反馈指定 N套需要反馈的 CSI, N为大于 1的自然数， M，为大于零且不大于 N的自然数。 A multi-point channel information feedback terminal, wherein the multi-point channel information feedback terminal is configured to feed back a set of CSI according to an indication of the network side, wherein the network side is a periodic CSI feedback and/or aperiodic of the terminal. The CSI feedback specifies N sets of CSIs that need to be fed back. N is a natural number greater than 1, and M is a natural number greater than zero and not greater than N.