CN103812545A - Feedback method and device for channel state information - Google Patents
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Abstract
Description
技术领域 technical field
本发明是关于无线通信中的信道状态信息(CSI,channel state information)反馈,特别是关于信道状态信息的反馈方法与装置。The present invention relates to channel state information (CSI, channel state information) feedback in wireless communication, in particular to a feedback method and device for channel state information.
背景技术 Background technique
长期演进(LTE,Long Term Evolution)项目是近年来第三代合作伙伴计划(3GPP,3rd Generation Partnership Project)启动的最大的新技术研发项目,这种以正交频分复用/频分多址技术(OFDM/FDMA)为核心的技术被看作“准4G”技术。LTE将是今后全球最主要的广域宽带移动通信系统,未来所有的2G/3G/3.5G技术都将殊途同归,统一演进到LTE/LTE-A(LTE-Advanced)阶段。目前业内已有多个LTE/LTE-A的标准版本,如R10、R11,提出了很多富有前景的技术方案,如备受关注的多点协作(CoMP,Coordinated Multi-Point)。The Long Term Evolution (LTE, Long Term Evolution) project is the largest new technology research and development project launched by the Third Generation Partnership Project (3GPP, 3rd Generation Partnership Project) in recent years. Technology (OFDM/FDMA) as the core technology is regarded as "quasi-4G" technology. LTE will be the most important wide-area broadband mobile communication system in the world in the future. In the future, all 2G/3G/3.5G technologies will reach the same goal by different routes and will evolve to the LTE/LTE-A (LTE-Advanced) stage. At present, there are multiple LTE/LTE-A standard versions in the industry, such as R10 and R11, and many promising technical solutions have been proposed, such as Coordinated Multi-Point (CoMP, Coordinated Multi-Point) that has attracted much attention.
同时,作为一项处于不断发展与完善的技术,LTE/LTE-A也必然存在若干亟待解决的问题。譬如根据最新的多点协作技术,间距密集的交叉极化天线的簇形线性阵列(CLA,clustered linear array)相较于垂直极化天线的均匀线性阵列具有更高的优先权。而现有的码本,如R10所提供的码本主要是针对均匀线性阵列布置的天线。如果对簇形线性阵列布置的天线使用适用于均匀线性阵列布置的天线的码本,则由于码本不适造成的量化错误将导致多点协作中非基于码本的预编码(non-codebook-based precoding)的严重性能损失。At the same time, as a technology that is constantly developing and improving, LTE/LTE-A must also have some problems that need to be solved urgently. For example, according to the latest coordinated multi-point technology, a clustered linear array (CLA) of densely spaced cross-polarized antennas has a higher priority than a uniform linear array of vertically polarized antennas. However, the existing codebooks, such as the codebook provided by R10, are mainly aimed at antennas arranged in a uniform linear array. If a codebook suitable for uniform linear array antennas is used for clustered linear array antennas, quantization errors due to codebook inappropriateness will lead to non-codebook-based precoding in CoMP precoding) severe performance loss.
因此,提供一种适用于交叉极化天线的簇形线性阵列的码本,较佳地解决信道状态信息的反馈问题成为LTE/LTE-A中的又一重要课题。Therefore, it becomes another important subject in LTE/LTE-A to provide a codebook suitable for a clustered linear array of cross-polarized antennas and better solve the problem of channel state information feedback.
发明内容 Contents of the invention
本发明的目的之一在于提供一种适用于交叉极化天线的簇形线性阵列的码本。One of the objectives of the present invention is to provide a codebook suitable for clustered linear arrays of cross-polarized antennas.
本发明的一实施例提供一反馈信道状态信息的方法,其包含:将一个传输点上的若干交叉极化天线划分成多个天线组,每个天线组包含四对交叉极化天线或至少一根具有相同极化方向的天线;将每一个天线组定义为一个信道状态信息-参考资源CSI-RS资源;及发送所定义的CSI-RS资源的信息。An embodiment of the present invention provides a method for feeding back channel state information, which includes: dividing several cross-polarized antennas on a transmission point into multiple antenna groups, and each antenna group includes four pairs of cross-polarized antennas or at least one Antennas having the same polarization direction; defining each antenna group as a channel state information-reference resource CSI-RS resource; and sending information of the defined CSI-RS resource.
在一实施例中,当传输点上天线是3D交叉极化天线时,所述每一天线组的天线来自所述3D交叉极化天线中的同一行或同一列。该方法可进一步包含选择性配置所定义的CSI--RS资源中特定两者间的相位反馈,并使用无线资源控制信令发送该相位反馈配置。可将所定义的CSI--RS资源中的一个或多个配置至一用户设备的多点协作的测量集。在一实施例中,所定义的CSI-RS资源传输不同的数据给同一用户设备,在另一实施例中所定义的CSI-RS资源中仅部分传输数据给同一用户设备。In an embodiment, when the antennas on the transmission point are 3D cross-polarized antennas, the antennas of each antenna group are from the same row or column of the 3D cross-polarized antennas. The method may further include selectively configuring phase feedback between specific two of the defined CSI-RS resources, and sending the phase feedback configuration using radio resource control signaling. One or more of the defined CSI-RS resources can be configured to a CoMP measurement set of a UE. In one embodiment, the defined CSI-RS resources transmit different data to the same user equipment, and in another embodiment, only part of the defined CSI-RS resources transmit data to the same user equipment.
本发明的一实施例提供另一反馈信道状态信息的方法,该方法包含:自一个传输点上的一对交叉极化天线中选取一根天线,该对交叉极化天线定义第一信道状态信息-参考资源CSI-RS资源;将所选取的天线定义为第二CSI-RS资源;及使用该第二CSI-RS资源的信道状态信息校正该第一CSI-RS资源的信道状态信息。An embodiment of the present invention provides another method for feeding back channel state information. The method includes: selecting an antenna from a pair of cross-polarized antennas on a transmission point, and the pair of cross-polarized antennas defines the first channel state information. -referring to a CSI-RS resource; defining the selected antenna as a second CSI-RS resource; and correcting the channel state information of the first CSI-RS resource by using the channel state information of the second CSI-RS resource.
在一实施例中,该第一CSI-RS资源的秩指示符为1。该第二CSI-RS资源不传输数据给用户设备,但可该第二CSI-RS资源配置至一用户设备的多点协作的测量集。In one embodiment, the rank indicator of the first CSI-RS resource is 1. The second CSI-RS resource does not transmit data to the UE, but the second CSI-RS resource can be configured to a CoMP measurement set of the UE.
本发明的一实施例提供终端侧的反馈信道状态信息的方法,该方法包含:接收多个CSI-RS资源的信息,其中多个CSI-RS资源中的每一个由一天线组定义,该天线组是由一个传输点上的若干交叉极化天线划分得到,且每一天线组包含四对交叉极化天线或至少一根具有相同的极化方向的天线;接收多个CSI-RS资源中特定两者间的相位反馈配置;及基于所述相位反馈配置反馈这特定两者中一个相对于另一个的相位。An embodiment of the present invention provides a method for feeding back channel state information at the terminal side, the method including: receiving information of multiple CSI-RS resources, wherein each of the multiple CSI-RS resources is defined by an antenna group, and the antenna A group is obtained by dividing several cross-polarized antennas on a transmission point, and each antenna group includes four pairs of cross-polarized antennas or at least one antenna with the same polarization direction; receiving multiple CSI-RS resources specific a phase feedback configuration between the two; and feeding back the phase of the particular one of the two relative to the other based on the phase feedback configuration.
在一实施例中,相位反馈配置是通过无线资源控制信令接收的。In one embodiment, the phase feedback configuration is received through RRC signaling.
此外,本发明的一实施例提供一基站,包含:天线组划分装置,将一个传输点上的若干交叉极化天线划分成多个天线组,每个天线组包含四对交叉极化天线或至少一根具有相同极化方向的天线;CSI-RS资源定义装置,将每一个天线组定义为一个信道状态信息-参考资源CSI-RS资源;及发送装置,发送所定义的CSI-RS资源的信息。In addition, an embodiment of the present invention provides a base station, including: an antenna group division device, which divides several cross-polarized antennas on a transmission point into multiple antenna groups, each antenna group includes four pairs of cross-polarized antennas or at least An antenna with the same polarization direction; a CSI-RS resource definition device, which defines each antenna group as a channel state information-reference resource CSI-RS resource; and a sending device, which sends the information of the defined CSI-RS resource .
该基站可包含相位反馈配置装置,选择性配置所定义的CSI--RS资源中特定两者间的相位反馈,并使用无线资源控制信令发送该相位反馈配置。也可包含测量集配置装置,将所定义的CSI--RS资源中的一个或多个配置至一用户设备的多点协作的测量集。The base station may include a phase feedback configuration device for selectively configuring phase feedback between specific two defined CSI-RS resources, and sending the phase feedback configuration using radio resource control signaling. It may also include a measurement set configuration device, configured to configure one or more of the defined CSI-RS resources to a coordinated multi-point measurement set of a user equipment.
根据本发明另一实施例的基站包含天线选取装置,自一个传输点上的一对交叉极化天线中选取一根天线,该对交叉极化天线定义第一信道状态信息-参考资源CSI-RS资源;CSI-RS资源定义装置,将所选取的天线定义为第二CSI-RS资源;及校正装置,使用该第二CSI-RS资源的信道状态信息校正该第一CSI-RS资源的信道状态信息。The base station according to another embodiment of the present invention includes an antenna selection device, which selects an antenna from a pair of cross-polarized antennas on a transmission point, and the pair of cross-polarized antennas defines a first channel state information-reference resource CSI-RS resources; CSI-RS resource defining means, defining the selected antenna as a second CSI-RS resource; and correcting means, using the channel state information of the second CSI-RS resource to correct the channel state of the first CSI-RS resource information.
本发明还提供用户设备,根据本发明的一实施例,该用户设备包含:资源信息接收装置,接收多个CSI-RS资源的信息,其中多个CSI-RS资源中的每一个由一天线组定义,天线组是由一个传输点上的若干交叉极化天线划分得到,且每一天线组包含四对交叉极化天线或至少一根具有相同极化方向的天线;相位反馈配置接收装置,接收所述CSI-RS资源中特定两者间的相位反馈配置;及相位反馈装置,基于相位反馈配置反馈特定两者中一个相对于另一个的相位。The present invention also provides user equipment. According to an embodiment of the present invention, the user equipment includes: a resource information receiving device for receiving information of a plurality of CSI-RS resources, wherein each of the plurality of CSI-RS resources is controlled by an antenna group Definition, the antenna group is divided by several cross-polarized antennas on a transmission point, and each antenna group contains four pairs of cross-polarized antennas or at least one antenna with the same polarization direction; the phase feedback configuration receiving device, receiving A phase feedback configuration between the two specified in the CSI-RS resources; and a phase feedback device for feeding back a phase of one of the two specified relative to the other based on the phase feedback configuration.
本发明解决了LTE/LTE-A中关于簇形线性阵列的信道状态信息反馈问题,提高了簇形线性阵列的分散增益(diversity gain),可支持网络侧的多用户多数据流预编码和调度,且可实现标准的向下兼容和向上的发展。The present invention solves the channel state information feedback problem of the clustered linear array in LTE/LTE-A, improves the dispersion gain (diversity gain) of the clustered linear array, and can support multi-user and multi-data stream precoding and scheduling on the network side , and can achieve standard downward compatibility and upward development.
附图说明 Description of drawings
图1是根据本发明一实施例的信道状态信息反馈方法的流程图;FIG. 1 is a flowchart of a channel state information feedback method according to an embodiment of the present invention;
图2是根据本发明一实施例的信道状态信息反馈方法应用于两天线的交叉极化天线簇形线性阵列时的示意图;FIG. 2 is a schematic diagram of a channel state information feedback method applied to a two-antenna cross-polarized antenna cluster linear array according to an embodiment of the present invention;
图3示例了根据本发明一实施例的信道状态信息反馈方法的流程图;FIG. 3 illustrates a flowchart of a channel state information feedback method according to an embodiment of the present invention;
图4是根据本发明一实施例的信道状态信息反馈方法应用于交叉极化的3D天线时的示意图;4 is a schematic diagram of a channel state information feedback method applied to a cross-polarized 3D antenna according to an embodiment of the present invention;
图5是根据本发明一实施例的对于两天线的交叉极化天线的信道状态信息的反馈方法的流程图;5 is a flow chart of a method for feedbacking channel state information of a cross-polarized antenna with two antennas according to an embodiment of the present invention;
图6是图5所示的方法的一具体应用实例示意图;Fig. 6 is a schematic diagram of a specific application example of the method shown in Fig. 5;
图7是根据本发明一实施例的基站的结构示意框图;FIG. 7 is a schematic block diagram of a structure of a base station according to an embodiment of the present invention;
图8是根据本发明另一实施例的基站的结构示意框图;Fig. 8 is a schematic block diagram of a structure of a base station according to another embodiment of the present invention;
图9是根据本发明一实施例的用户设备的结构示意框图。Fig. 9 is a schematic block diagram of a structure of a user equipment according to an embodiment of the present invention.
具体实施方式 Detailed ways
为更好的理解本发明的精神,以下结合本发明的部分优选实施例对其作进一步说明。In order to better understand the spirit of the present invention, it will be further described below in conjunction with some preferred embodiments of the present invention.
在LTE/LTE-A R11中,用户设备可被配置成针对每一分量载波(CC:ComponentCarrier)报告一个或多个信道状态信息。而在多点协作的情况下,每个信道状态信息由信道部分和干扰部分的结合配置,其中信道部分是多点协作测量集中的一个非零功率(NZP,non-zero power)信道状态信息-参考信号(CSI-RS,Channel StateInformation-Reference Signal)资源。对于不同的信道状态信息,所配置的非零功率CSI-RS资源可以是不同的。In LTE/LTE-A R11, the user equipment can be configured to report one or more channel state information for each component carrier (CC: ComponentCarrier). In the case of CoMP, each channel state information is configured by a combination of a channel part and an interference part, where the channel part is a non-zero power (NZP, non-zero power) channel state information in the CoMP measurement set - Reference signal (CSI-RS, Channel State Information-Reference Signal) resource. For different channel state information, the configured non-zero power CSI-RS resources may be different.
随着LTE/LTE-A技术的发展,交叉极化天线的簇形线性阵列(CLA,clustered lineararray)将被愈来愈广泛的使用。而现有的码本,如R10所提供的码本主要用于2天线及4天线均匀线性阵列。如果对簇形线性阵列布置的极化天线直接使用R10提供的码本,则码本不适造成的量化错误必将带来的严重的性能损失,如降低分散增益。With the development of LTE/LTE-A technology, a clustered linear array (CLA, clustered linear array) of cross-polarized antennas will be more and more widely used. However, the existing codebook, such as the codebook provided by R10, is mainly used for 2-antenna and 4-antenna uniform linear arrays. If the codebook provided by R10 is directly used for the polarized antennas arranged in clustered linear arrays, quantization errors caused by inappropriate codebooks will inevitably lead to serious performance loss, such as reducing the dispersion gain.
根据本发明一实施例的信道状态信息反馈(包括网络侧的反馈配置和终端侧的反馈)方法与装置可解决上述问题。The method and device for channel state information feedback (including feedback configuration at the network side and feedback at the terminal side) according to an embodiment of the present invention can solve the above problems.
图1所示是根据本发明一实施例的信道状态信息反馈方法的流程图,该方法包含:在步骤10,在网络侧将一个传输点上的若干交叉极化天线划分成多个天线组,每个天线组包含四对交叉极化天线或至少一根具有相同极化方向的天线。在一实施例中可将2根或4根交叉极化天线划分为两组,每组内的天线具有相同的极化方向,例如都是垂直极化。在一实施例中可将8对16根交叉极化天线划分为2组,每组都是4对交叉极化天线。在步骤12,将划分得到的每一个天线组定义为一个CSI-RS资源。然后在步骤14,由网络侧,如基站发送所定义的CSI-RS资源的信息给终端侧,如用户设备。FIG. 1 is a flowchart of a channel state information feedback method according to an embodiment of the present invention, the method includes: at
图2所示即是根据本发明一实施例的信道状态信息反馈方法应用于两天线的交叉极化天线簇形线性阵列时的示意图。图2中X标识一对交叉极化天线,「/」或「\」分别标识不同极化方向的一根天线(后续同)。传输点20,即CSI-RS资源#1,包含两根极化天线。将两根天线分成两组22、24,每一组22、24定义为一个新的CSI-RS资源,第一组22为CSI-RS资源#1-1、第二组24为CSI-RS资源#1-2;然后把CSI-RS资源#1-1与CSI-RS资源#1-2的信息发送给相应的终端,从而完成信道状态信息的反馈配置。该终端可以自CSI-RS资源#1-1与CSI-RS资源#1-2分别接收数据,并根据接收的关于两者的反馈配置分别反馈CSI-RS资源#1-1与CSI-RS资源#1-2的信道状态信息。FIG. 2 is a schematic diagram of a channel state information feedback method applied to a two-antenna cross-polarized antenna cluster linear array according to an embodiment of the present invention. In Figure 2, X identifies a pair of cross-polarized antennas, and "/" or "\" respectively identify an antenna with a different polarization direction (the same follows). Transmission point 20, namely CSI-RS resource #1, includes two polarized antennas. Divide the two antennas into two groups 22, 24, each group 22, 24 is defined as a new CSI-RS resource, the first group 22 is CSI-RS resource #1-1, and the second group 24 is CSI-RS resource #1-2; then send the information of the CSI-RS resource #1-1 and the CSI-RS resource #1-2 to the corresponding terminal, thereby completing the feedback configuration of the channel state information. The terminal can receive data from CSI-RS resource #1-1 and CSI-RS resource #1-2 respectively, and feed back CSI-RS resource #1-1 and CSI-RS resource respectively according to the received feedback configuration about the two Channel status information of #1-2.
根据本发明的一实施例的信道状态信息反馈方法还进一步包含在网络侧选择性配置所定义的CSI--RS资源中特定两者间的相位反馈,并使用无线资源(RRC,RadioResource Control)信令发送该相位反馈配置。例如,对于图2所示的实施例,可以配置用户设备反馈CSI-RS资源#1-2相对于CSI-RS资源#1-1的相位,具体配置如表1所示。The channel state information feedback method according to an embodiment of the present invention further includes specifying the phase feedback between the two in the CSI-RS resources defined by selective configuration on the network side, and using radio resource (RRC, RadioResource Control) information command to send the phase feedback configuration. For example, for the embodiment shown in FIG. 2 , the user equipment may be configured to feed back the phase of the CSI-RS resource #1-2 relative to the CSI-RS resource #1-1, and the specific configuration is shown in Table 1.
表1选择性相位反馈配置Table 1 Selective Phase Feedback Configuration
相应的,在终端侧,图3示例了根据本发明一实施例的信道状态信息反馈方法的流程图。如图3所示,该信道状态信息反馈方法包含:在步骤30接收多个如前所述的依天线组定义的CSI-RS资源的信息,如上述CSI-RS资源#1-1与CSI-RS资源#1-2。在步骤32接收多个CSI-RS资源中特定两者间的相位反馈配置,如接收如表1所述的关于CSI-RS资源#1-1与CSI-RS资源#1-2的相位反馈配置。然后在步骤34基于接收的相位反馈配置反馈两者中一个相对于另一个的相位,例如报告相对于CSI-RS资源#1-1的相位。Correspondingly, on the terminal side, FIG. 3 illustrates a flowchart of a channel state information feedback method according to an embodiment of the present invention. As shown in FIG. 3 , the method for channel state information feedback includes: at
在本发明的另一实施例中,可以将所定义的CSI--RS资源中的一个或多个配置至一用户设备的多点协作的测量集,该配置对该用户设备是透明的。In another embodiment of the present invention, one or more of the defined CSI-RS resources may be configured to a coordinated multi-point measurement set of a user equipment, and the configuration is transparent to the user equipment.
这些依天线组定义的CSI-RS资源不限于向同一用户设备传输相同的数据,可以传输不同的数据,可以都不传数据或者仅部分CSI-RS资源传输数据。就图2所示的实施例而言,CSI-RS资源#1-1与CSI-RS资源#1-2可以都发送数据给用户设备,也可以都不发,或仅其中之一如CSI-RS资源#1-1发送。These CSI-RS resources defined according to the antenna group are not limited to transmitting the same data to the same user equipment, but may transmit different data, may transmit no data or only part of the CSI-RS resources transmit data. As far as the embodiment shown in FIG. 2 is concerned, both CSI-RS resource #1-1 and CSI-RS resource #1-2 can send data to the user equipment, or neither can send data, or only one of them is like CSI-RS resource #1-2. RS resource #1-1 transmits.
图4是根据本发明一实施例的信道状态信息反馈方法应用于交叉极化的3D天线时的示意图。在对3D极化天线进行分组是需按行或列的方式进行分组,不同行且不同列的极化天线不会被分到同一天线组;而且不需要对所有的行或列都进行分组。本实施例中,第一CSI-RS资源40(CSI-RS资源#4)包含的3D天线是两行4列共16根天线的组合。分组后将第二行的四对交叉天线定义为第二CSI-RS资源42(CSI-RS资源#4-1)、将第一列的4根交叉天线按极化方向又分为两组分别定义为第三CSI-RS资源44(CSI-RS资源#4-2)及第三CSI-RS资源46(CSI-RS资源#4-3);第一行未用于定义新的CSI-RS资源。在其它实施例中,也可将第一行的交叉天线分为一组,也可将第一行或第二行的交叉天线按极化方向作进一步分组;同样,对各列亦如此。FIG. 4 is a schematic diagram of a channel state information feedback method applied to a cross-polarized 3D antenna according to an embodiment of the present invention. When grouping 3D polarized antennas, it is necessary to group them in rows or columns, and polarized antennas in different rows and columns will not be grouped into the same antenna group; and it is not necessary to group all rows or columns. In this embodiment, the 3D antennas contained in the first CSI-RS resource 40 (CSI-RS resource #4) are a combination of 16 antennas in two rows and four columns. After grouping, the four pairs of cross antennas in the second row are defined as the second CSI-RS resource 42 (CSI-RS resource #4-1), and the four cross antennas in the first column are divided into two groups according to the polarization direction, respectively Defined as the third CSI-RS resource 44 (CSI-RS resource #4-2) and the third CSI-RS resource 46 (CSI-RS resource #4-3); the first line is not used to define a new CSI-RS resource. In other embodiments, the cross antennas in the first row may also be grouped, and the cross antennas in the first row or the second row may be further grouped according to the polarization direction; similarly, the same is true for each column.
对于图4所示的实施例,可以选择配置用户设备反馈CSI-RS资源#4-3相对于CSI-RS资源#4-2的相位,具体配置如表2所示。For the embodiment shown in FIG. 4 , it is optional to configure the user equipment to feed back the phase of the CSI-RS resource #4-3 relative to the CSI-RS resource #4-2. The specific configuration is shown in Table 2.
表1选择性相位反馈配置Table 1 Selective Phase Feedback Configuration
根据本发明另一实施例,对于两天线的交叉极化天线,为避免所接收的信道状态信息反馈,如预编码矩阵索引(PMI,Precoding Matrix Indicator)/信道质量指示(CQI,Channel Quality Indicator)不准确,可选取其中一根天线的信道状态信息对其进行校正。图5是根据本发明一实施例的对于两天线的交叉极化天线的信道状态信息的反馈方法的流程图,图6是图5所示的方法的一具体应用实例示意图。结合图5、6,该方法包含,在步骤50自一个传输点60,即第一CSI-RS资源60(CSI-RS资源#1)上的一对交叉极化天线中选取一根天线,较佳的该第一CSI-RS资源的秩指示符(RI,RankIndicator)为1;在步骤52将所选取的天线定义为第二CSI-RS资源62(CSI-RS资源#1-1);在步骤54使用该第二CSI-RS资源62的信道状态信息校正该第一CSI-RS资源60的信道状态信息。由于第二CSI-RS资源62仅有一个天线端口,用户设备仅会反馈一个信道质量指示,因而可使用第二CSI-RS资源62的信道质量指示校正原CSI-RS资源即第一CSI-RS资源的CQI/PMI反馈。According to another embodiment of the present invention, for a cross-polarized antenna with two antennas, in order to avoid feedback of received channel state information, such as a precoding matrix index (PMI, Precoding Matrix Indicator)/channel quality indicator (CQI, Channel Quality Indicator) Inaccurate, the channel state information of one of the antennas can be selected to correct it. Fig. 5 is a flow chart of a method for feeding back channel state information of cross-polarized antennas with two antennas according to an embodiment of the present invention, and Fig. 6 is a schematic diagram of a specific application example of the method shown in Fig. 5 . 5 and 6, the method includes, in
第二CSI-RS资源62仅用作协助校正信道状态信息反馈,而不传输数据给用户设备,但可配置至用户设备的多点协作的测量集,该配置对用户设备同样是透明的。The second CSI-RS resource 62 is only used to assist in correcting channel state information feedback, and does not transmit data to the user equipment, but can be configured to the CoMP measurement set of the user equipment, and this configuration is also transparent to the user equipment.
此外,本发明还提供了实施上述信道状态信息反馈方法的信道状态信息反馈装置,如基站或用户设备。图7是根据本发明一实施例的基站70的结构示意框图。该基站70包含天线组划分装置700,将一个传输点上的若干交叉极化天线划分成多个天线组,每个天线组包含四对交叉极化天线或至少一根具有相同极化方向的天线。当然传输点上天线是3D交叉极化天线时,每一天线组的天线来自3D交叉极化天线中的同一行或同一列;CSI-RS资源定义装置702,将每一个天线组定义为一个信道状态信息-参考资源CSI-RS资源;及发送装置704,发送所定义的CSI-RS资源的信息给用户设备。In addition, the present invention also provides a channel state information feedback device implementing the above channel state information feedback method, such as a base station or user equipment. Fig. 7 is a schematic block diagram of the structure of a
在其它实施例中,该基站70进一步包含相位反馈配置装置,选择性配置所定义的CSI--RS资源中特定两者间的相位反馈,并使用无线资源控制信令发送该相位反馈配置。其也可测量集配置装置,将所定义的CSI--RS资源中的一个或多个配置至一用户设备的多点协作的测量集。In other embodiments, the
图8是根据本发明另一实施例的基站80的结构示意框图。该基站80包含天线选取装置800,自一个传输点上的一对交叉极化天线中选取一根天线,该对交叉极化天线定义第一信道状态信息-参考资源CSI-RS资源;CSI-RS资源定义装置802,将所选取的天线定义为第二CSI-RS资源;及校正装置804,使用该第二CSI-RS资源的信道状态信息校正该第一CSI-RS资源的信道状态信息。Fig. 8 is a schematic structural block diagram of a
该基站80同样可包含测量集配置装置,将该第二CSI-RS资源配置至一用户设备的多点协作的测量集。The
图9是根据本发明一实施例的用户设备90的结构示意框图。该用户设备90包含资源信息接收装置902,接收多个CSI-RS资源的信息,其中多个CSI-RS资源中的每一个由一天线组定义,天线组是由一个传输点上的若干交叉极化天线划分得到,且每一天线组包含四对交叉极化天线或至少一根具有相同极化方向的天线;相位反馈配置接收装置904,接收多个CSI-RS资源中特定两者间的相位反馈配置;及相位反馈装置906,基于相位反馈配置反馈特定两者中一个相对于另一个的相位。Fig. 9 is a schematic block diagram of a structure of a
本发明通过对交叉极化天线依极化方向进行分组,降低了信道状态信息反馈的量化误差,提高了簇形线性阵列的分散增益,而且可支持网络侧的多用户多数据流预编码和调度。不仅适用于多点协作也适用于多用户-多进多出(MU-MIMO,MultipleUser-Multiple Input Multiple Output)系统。The invention reduces the quantization error of the channel state information feedback by grouping the cross-polarized antennas according to the polarization direction, improves the dispersion gain of the clustered linear array, and can support multi-user multi-data stream precoding and scheduling on the network side . It is not only suitable for multi-point cooperation but also for multi-user-multiple input multiple output (MU-MIMO, Multiple User-Multiple Input Multiple Output) system.
需要指出的是,由于技术的发展和标准的更新,具有相同功能的部件往往具有多个不同的称呼。本发明专利申请书中所使用的技术名词是为解释和演示本发明的技术方案,应以其在本技术领域内所共识的功能为准,而不能仅以名称的异同任意解读。It should be pointed out that due to the development of technology and the updating of standards, components with the same function often have multiple different names. The technical terms used in the patent application of the present invention are for explaining and demonstrating the technical solutions of the present invention, and should be based on their functions agreed in the technical field, rather than being interpreted arbitrarily based on the similarities and differences of the names.
本发明的技术内容及技术特点已揭示如上,然而熟悉本领域的技术人员仍可能基于本发明的教示及揭示而作种种不背离本发明精神的替换及修饰。因此,本发明的保护范围应不限于实施例所揭示的内容,而应包括各种不背离本发明的替换及修饰,并为本专利申请权利要求书所涵盖。The technical content and technical features of the present invention have been disclosed above, but those skilled in the art may still make various substitutions and modifications based on the teaching and disclosure of the present invention without departing from the spirit of the present invention. Therefore, the protection scope of the present invention should not be limited to the content disclosed in the embodiments, but should include various replacements and modifications that do not depart from the present invention, and are covered by the claims of this patent application.
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